5th Chemical Congress of North America Cancun, Mexico November

final p r o g r a m

5th Chemical Congress of North America Cancun, Mexico November 11-15,1997

T

he 5th Chemical Congress of North America will be held Nov. 11-15 in Cancun, on Mexico's Yucatan Peninsula. The three sponsoring societies are the Sociedad Quimica de Mexico, the American Chemical Society, and the Canadian Society for Chemistry. The Federacion Latinoamericana de Asociaciones Quimicas is an official participating organization of this congress. The international flavor of the program is reflected in the nearly 100 symposia in 12 topical areas and a late-breaking topic segment. About 2,700 papers and posters will be presented. A breakdown of the technical program according to the topical areas begins on page 45. The list of papers, which is organized chronologically, begins on page 50. An exposition will be held as part of the congress; descriptions of the more than 30 companies and organizations participating begins on page 41. The exposition will be held in the convention center. The deadline for registration and housing is Oct. 3. The housing form is on page 44, and the registration form is on page 49. Tour information is not repeated here; it is in the preliminary program (C&EN, June 2, page 43) and on the Internet at the web site given below. Information about this congress—including registration and reservation forms—is available on the Internet at http://www.acs.org/ meetings/5nacc.

other countries, appreciably discounted fees are in effect as an incentive to register in advance. The scale of fees is shown below. Either payment in full or authorization to charge to a credit card (American Express, MasterCard, or VISA) must accompany your registration form. Purchase orders and training requests will not be honored. Payment should be made in U.S. dollars. Checks should be made payable to ACS or American Chemical Society. Non-U.S. registrants paying by bank transfer must include payment to cover any bank charges. If making payment by wire transfer, the following address and account information must be used: NationsBank, 1501 Pennsylvania Ave., N.W., Washington, D.C. 20013, ACS Account No. 2080589526, ABA (Routing & Transit No.) 054001204, Telex No. 6491302, Swift Account No. NABKUS3AWDC. Mail the completed form with payment to: 5NACC Secretariat, c/o American Chemical Society, P.O. Box 18598, 20th St. Station, Washington, D.C. 20036-8598. Please allow at least three weeks to process your registration. Meeting badges and receipts will be mailed to all registrants, including those residing outside the U.S., at the address shown on the registration form. If a registrant's affiliation and business address are not available, please provide home address. On-Site Registration. On-site registration facilities will be located in the Cancun Convention Center. The hours for registration will be Tues-

day, Nov. 11, 1 to 7 PM; Wednesday, Nov. 12, through Friday, Nov. 14, 8 AM to 3 PM; and Saturday, Nov. 15, 8 AM to noon. On-site, the currency accepted for registration and abstracts will be the Mexican peso. Abstracts. Abstracts will be mailed upon completion, about Oct. 23, to U.S. residents paying the additional postage fee. If a United Parcel Service address (street address) is not provided for the shipment of the abstract book, receipt prior to the meeting is not guaranteed. Receipt cards will be mailed to all other registrants ordering the abstracts; receipts can be exchanged for books in the registration area. Refunds. All registration cancellations and requests for refunds must be submitted in writing and sent via fax to the 5NACC Secretariat at (202) 872-6013, (202) 872-6128 or (202) 872-6131; or in writing to the address given previously. Refund requests will not be accepted by telephone. Cancellations received before Oct. 24 entitle the registrant to a full refund. Cancellations received after Oct. 24 but prior to Dec. 1 entitle the registrant to an 80% refund. No refunds will be made after Dec. 1. Refund requests for tour tickets will be honored if the tickets are returned to the 5NACC Secretariat by Oct. 24. Tickets are nonrefundable after Oct. 24; however, in case of an emergency on-site, staff at the Tour Service Desk will attempt to resell your tickets and then issue a refund.

Registration

Fee

The deadline for advance registration for the 5th Chemical Congress of North America (5NACQ is Oct 3. The registration form is on page 49. Please allow at least 10 days for your registration to reach the 5NACC Secretariat. Registrations received after the deadline will be returned. A separate form must be provided for each registrant, including accompanying persons. Registration payment should not be combined with any other payment—meeting registration has a separate mailing address. Residents of Mexico should contact Sociedad Quimica de Mexico for information about registration fees; phone 5-386-29-05, fax 5-386-02-55. For residents of Canada, the U.S., and all

On-site

|

Advance (U.S. dollars)

U.S. dollars

Pesos

$240

$290

2,320

240

290

2,320

290

350

2,800

Spouse/guest

25

25

200

Student: less than postdoctoral status High school teacher: member ornonmember

25

25

200

50

50

400

Abstract book

20

20

160

Classification of registrant

Member: ACS, CSC, or FLAQ

|

Member: SQM (contact SQM at the numbers given in text) National affiliate: ACS or CSC Nonmember: technical professional eligible for membership in a sponsoring or participating society

SEPTEMBER 15, 1997 C&EN 4 1

final

program

5NACC has appointed Travel Planners Inc. (TPI) as the official housing and travel coordinator. TPI can facilitate your total convention requirements, including housing, air transportation, pre- or postcongress tours, individual arrangements in conjunction with the congress, and documentation. You will receive a confirmation/billing directly from TPI within 10 working days following receipt of your reservation form. Any balance due is payable by Oct. 3. Housing Residents of Mexico. Contact the Sociedad Quimica de Mexico for housing information; phone 5-386^29^)5; fax 5-386^)2-55. Residents of Canada, the U.S., and Other Countries. Sleeping rooms have been reserved at participating Cancun hotels near the convention center (see page 43) at special convention rates that are available only through advance reservation. The special rates are not available directly through the hotels. The convention rate applies three days prior to and three days following the meeting days, based on availability. Stays beyond these dates will be confirmed subject to hotel availability and applicable rate. On the housing and transportation reservation form (page 44), be sure to indicate four hotel preferences. Your reservation will be confirmed when it is received. You are encouraged to mail your reservation form early to ensure a hotel of your choice. Should all of your hotel choices be sold out, you will be confirmed at a hotel based on location or rate, as indicated on your form. Rooms will be confirmed only upon receipt of a one-night deposit payable to TPI by personal or company check (U.S. funds only) or guaranteed to a major credit card. Your deposit will be forwarded to the hotel and will appear as an opening credit on your room account. The balance due for room, taxes (currently 10% VAT plus 2% Cancun hotel tax), and any personal charges made to your room account is payable in full upon checkout. The hotels accept all major credit cards, travelers checks, U.S. dollars and/or the equivalent in Mexican pesos. Personal checks are not accepted. Ground Transportation Arrival transfers ($10 per person) may be prearranged for Sunday, Nov. 9; Monday, Nov. 10; Tuesday, Nov. 11; and Wednesday, Nov. 12. Transfers must be ordered in advance. Transfers include bilingual (Spanish/English) staff at the airport, transportation with luggage to the hotel, and gratuities to airport staff. Special encoded luggage tags to expedite luggage handling will be sent to those who prearrange for arrival transfers; these tags must be on your bags when you check them at the beginning of your trip. (Tips to hotel porters are not included and should be handled on an individual basis.) Departures at the conclusion of the meeting may be arranged by taxis, which are available at all the hotels. 42

SEPTEMBER 15, 1997 C&EN

Airline Information To Residents of Mexico. downtown Contact the Sociedad Cancun Quimica de Mexico for airline information; phone 5-386-29-05, fax 5-38602-55. Residents of Canada. The Canadian Society for Chemistry has appointed Canadian Airlines International as the official Canadian carrier for 5NACC. Travel will be on Canadian Airlines International in conjunction with American Airlines. To make reservations, phone Canadian Airlines International at (800) 665-5554 and mention File No. MJ01308. If you elect to use a travel agent, please provide your agent with the above information and file number. Residents of the U.S. TPI has reserved blocks of seats from U.S. gateway cities on major airlines for travel to Cancun on Sunday, Nov. 9, through Tuesday, Nov. 11; returning from Cancun on Saturday, Nov. 15, through Monday, Nov. 17, at guaranteed fares; that is, fares not subject to increase before travel commences. These seats are limited and are available only through TPI, which will confirm them on a first-request basis. Book early to take advantage of these savings. When guaranteed fares are no longer available, TPI will confirm reservations from general airline inventory at prevailing fares in effect. In all cases, TPI will arrange transportation from your home city to Cancun, based on the most economical fares and convenient schedules available. Residents of Other Countries. If traveling to 5NACC from countries other than the U.S., Canada, or Mexico, please check with international airlines or a travel agent in your country of origin for the most advantageous fares and schedules to Cancun. Changes and Cancellations. Cancun hotel cancellations received 72 hours or less before scheduled arrival—including no shows— are subject to a one-night penalty charged by the hotel, plus an administrative fee of $25. Don't be a no show. Cancellations of Mérida pre- and post-congress tours are subject to a fee of $50 per person before θ α . 9 and of $100 per person thereafter. All changes and cancellation notices must be received by TPI in writing, either by mail or fax. Reminders and Check List *> Use one form per room. Forms may be duplicated. list full legal name(s) of all per­ sons occupying a room. V Make a copy of your completed forms and retain for your records. f* Mail or fax reservation form. Do not do both, because this will result in duplicate bookings. ** Include payment. A one-night hotel de­ posit is required and is payable by check or

&Msi$L

Convention Center

Caribbean

To airport

draft in U.S. funds only or by major credit card guarantee. You will be billed for the bal­ ance due on pre- or post-congress tours, trans­ fers, and/or airline tickets. Airline tickets may be charged to a credit card. M* International payments may be wired di­ rectly to Travel Planners Inc.: Account No. 024224-1, Broadway National Bank, San Antonio, Texas. The routing number (ABA number) for Broadway National Bank is 114021933. Wire should be "Type 12," which ensures that TPI will be advised immediately of the transfer of your funds. Remit in U.S. funds and be sure to include funds to cover all wire transfer fees. Also, be sure your name, company name, and 5th North Amer­ ican Chemical Congress are referenced to ensure you receive proper credit. *^ If after three weeks you have not re­ ceived a confirmation from TPI, do not assume that your hotel choice has been confirmed. Contact TPI for verification. u* Check your confirmation carefully and report any discrepancies to TPI. u* If you have any questions or need further assistance, contact ΤΠΡΙ directly from 8:30 AM to 5:30 PM central daylight time, Monday through Friday; phone (210) 341^8131, fax (210) 3415252, e-mail: [email protected].

Documentation for All Attendees. U.S. and Canadian citizens will need a Mexican Tourist Permit—which can be obtained from TPI, other travel agents, or as you check in for your flight to Mexico, with final documents— along with proof of citizenship (for example, current passport, certified birth certificate, or original U.S. Naturalization papers; the latter

Hotels in Cancun Single or Double

Hotel

1 Camino Real 2 Continental Plaza

$110

Additional person

$25

$405 up

i>

Έ

._!.

II

V

12 years

Yes

Yes

Yes

Yes

Yes

î

Suites

II

80

20

138 up

12

Yes

Yes

No

Yes

Yes

3 Fiesta Americana Cancun

110

25

170 up

12

Yes

Yes

No

Yes

Yes

4 Fiesta Americana Coral Beach (Headquarters hotel)

120

30

195 up

12

Yes

Yes

Yes

Yes

Yes

5 Hyatt Regency

110

25

400 up

12

Yes

Yes

Yes

Yes

Yes

6 Krystal

105

25

320 up

12

Yes

Yes

Yes

Yes

Yes

98

25

305 up

16

Yes

Yes

Yes

Yes

Yes

7 Présidente Intercontinental

Note: Rates listed do not include Mexico taxes (currently 10% VAT and 2% occupancy tax per room per night). Taxes are subject to change. Rates also inculde a pro­ cessing fee. Hotels allow a maximum of three adults per room. A maximum of two children of the ages listed or younger stay free when sharing a room with parent(s). Children older than the ages listed will be charged the additional adult rate. Suites will be confirmed subject to availability. All hotels listed are beachfront properties located on the Caribbean side of Cancun Island. They all have air-conditioning, outdoor swimming pools, and tennis courts. Accessible rooms for the disabled are available in limited numbers at each hotel. Please reserve early if you have special needs. Most hotels are within easy walking distance of the convention center. Public buses run the length of the hotel zone, past the convention center, with pick-up and drop-off points designated by blue rectangular signs. The one-way fare is 3 pesos per person (about 50 cents). Please have correct fare in pesos ready when boarding. Taxis are federally regulated and relatively inexpensive. Fares within the hotel zone are approximately 35-40 pesos. There are no meters in the taxis, so it is recommended that you inquire about the fare before entering a cab.

Key:

Ί Γ = Children of this age or younger are free

™l 111

, - ^ — x , = Room service | j = Cafe and/or restaurant

= Babysitting/child care may be arranged from the hotel concierge; rates range from $7.00 to $10 per hour = Exercise or fitness room

(tj

= Accessible rooms for persons with disabilites

two must be supported by a photo I.D.). This applies to each person, regardless of age. In addition, children traveling to Mexico with only one parent must have a notarized letter of consent from the other parent. Citizens of other countries should contact their nearest Mexican Consulate for specific en­ try requirements. It is imperative that you pro­ vide your full legal name on the reservation form, as it appears on your passport or other proof of citizenship, so that your airline tickets may be issued properly. Otherwise, the airlines could deny boarding.

(35-mm) slide projector with remote control, overhead projector, screen, electric pointer, lighted podium, and lapel microphone. Re­ quests for other special equipment must be received, in writing, by the 5NACC opera­ tions staff by Sept. 30. There may be an addi­ tional charge for special equipment. Poster boards will be 4 feet χ 6 feet.

Traveling the City. All technical sessions will be held within walking distance (2-3 blocks) of the convention center. The city bus service is convenient, reliable, and inexpensive. Spe­ cial shuttle service during 5NACC will not be provided.

Climate and Dress. Cancun has more than 300 days of sunshine each year, and tempera­ tures average from 68 to 80 °C year round. Dress for daytime activities is casual.

Persons with Disabilities. The facilities used for 5NACC functions are readily accessi­ ble. Please check the box on the advance reg­ istration form if you have a disability and would like to be contacted prior to 5NACC concerning your requirements. You can also submit your request by e-mail to d_ruddy@ acs.org or by using the telecommunications relay service to call the 5NACC Secretariat at (202) 872-6286. Please submit your require­ ments no less than six weeks prior to the con­ gress; we may not be able to accommodate last-minute requests. You will receive a confir­ mation of your request after it has been ful­ filled. If you must cancel, please notify the 5NACC Secretariat immediately. Speaker Information. Each meeting room will be equipped as follows: 2-inch x 2-inch

9 AM-12:30 PM 9AM-12:30PM 1:30-3:30 PM 3:30-7 PM 7:30-9:30 PM 8-10:30 PM

Currency Exchange. All financial transac­ tions at 5NACC will take place in Mexican pe­ sos. Currency exchange can be accomplished at any local bank or in many of the hotels.

THURSDAY, NOV. 13 8:30 AM-4:30 PM 9AM-12:30PM 3-5:30 PM 3:30-5:30 PM 6-9:30 PM

Schedule of Events TUESDAY, NOV. 1 1 7-7:45 PM Opening ceremony 8-9 PM Ballet Folklorico de Yucatan 9-11 PM Opening mixer

WEDNESDAY, NOV. 12 8:30 AM-4:30 PM Exhibition, convention center

Morning symposia Workshop, Hemispheric Collaboration in Science Poster sessions Afternoon symposia Poster sessions Special symposium, Science Policy & Scientific Cooperation in the Americas

Exhibition, convention center Morning symposia Presentation on Codex Badiano Poster sessions Evening symposia

FRIDAY, NOV. 14 9AM-12:30PM Morning symposia 1:30-3:30 PM Poster sessions 3:30-7 PM Afternoon symposia 7-9 PM Poster sessions

SATURDAY, NOV. 15 9 AM-12:30 PM 2-5:30 PM 7-8:30 PM 9-11 PM

Morning symposia Afternoon symposia Ballet Folklorico Closing party

SEPTEMBER 15, 1997 C&EN 4 3

HOUSING & TRANSPORTATION RESERVATION FORM 5TH CHEMICAL CONGRESS OF NORTH AMERICA Cancun, Mexico

Nov. 11-15 Use this form to request Cancun housing, airline reservations, ground transportation, and/or pre- or post-congress tours. Do not send this form to the Congress Secretariat or CSC. Reservations cannot be made by telephone, but are accepted by fax if you wish to guarantee the hotel deposit to a credit card.

Complete and mail or fax this form to: Travel Planners Inc., 800 N.W. Loop 410, Suite 150-S, San Antonio, Texas 78216; phone: (210) 341-8131, fax: (210) 341-5252, e-mail: [email protected] Deadline for receipt at TPI: Oct. 3 MAIL ACKNOWLEDGMENT TO:

Organization/Department.

Name Street Address. City Phone (w).

Fax

(h).

HOUSING Read housing information on page 42 before completing this form. Indicate your hotel preference by placing a #1, #2, #3, and #4 next to the hotels listed. Hotel preference based primarily on: D Rate Camino Real

. Fiesta Americana Cancun

Hyatt Regency

. Présidente Intercontinental

. Fiesta Americana Coral Beach

Krystal

Room type (check one) D Single (1 person, 1 bed) D Twin (2 people, 2 beds) D Double (2 people, 1 bed) D Triple (3 people, 2 beds) D Suite (Junior, 1 or 2 bedrooms) (Request basis only) Arrival day/date:

Departure day/date:

GROUND TRANSPORTATION Arrival transfers will be provided on Sunday, Nov. 9; Monday, Nov. 10; Tuesday, Nov. 11; and Wednesday, Nov. 12 only. Cost: $10 per person, including luggage handling at the airport. Passengers @ $10 per person = $ TOURS TO MÉRIDA (see C&EN, June 2, page 46) D Pre-congress tour (Nov. 9-11) D Post-congress tour (Nov. 16-18) D Single room D Twin/Double D Triple List names of occupants (if different than Cancun hotel) Adults: Surname, first name

Children: First name, age

1.

1.

2.

2.

3. A deposit of $75 per person is required to reserve space on one of these tours. Balance is payable by Oct. 3.

Total No. of nights No. of persons in room:

Adults

Children

Print all names (including your own) to occupy room below. (Use a separate form for each room. Maximum 3 adults or 2 adults/2 children per room. Adults: Surname, first name

Children: First name, age

1. 2. 3.

1. 2.

AIRLINE RESERVATIONS Read special airline information on page 42 before completing this form. Please arrange the following air transportation: From: (City, State, Country) To Cancun on (Day/Date):

If so, please specify: D Nonsmoking room (if available)

Return on (Day/Date)

If you must arrive or depart Cancun at a specific time of day, indicate here: D Early AM D Late AM

D Check here if you require any special accommodations because of a disability.

D Other requests:

Please note: The hotels will do everything possible to fulfill special requests, for example, nonsmoking rooms or king-size beds, to the extent available at time of check-in. We regret such requests cannot be guaranteed in advance. Payment: All hotels require a one-night advance deposit to guarantee the reservation. A check or credit card guarantee must accompany this form to confirm your request. See space below to reserve using credit card. D Check/draft enclosed in U.S. funds, payable to Travel Planners Inc. D Use credit card to guarantee room reservation (see below) Changes/Cancellations: All changes to confirmed reservations and/or cancellations must be sent to Travel Planners Inc. via mail or fax. Room assignments will be made in the order received. Incomplete information will result in a delay in processing your request. (Read Housing information for cancellation information.)

D Evening

D Early afternoon

Π l/we are participating in the pre-congress tour to Mérida (Nov. 9-11) D l/we are participating in the post-congress tour to Mérida (Nov. 16-18) Flights will be confirmed accordingly. If you wish stopovers en route to or returning from Cancun, please attach a separate note giving exact dates and names of places to be visited. Airline preference (if any) Airline frequent flier No D Senior citizen? If so, what is your age? ( ) Preferred seating: D Window D Aisle D Smoking if permitted D Requirements due to disability or dietary restrictions: Payment: D Invoice me for airline tickets. Tickets will be issued at fare in effect when payment is received. D Charge airline tickets to my credit card, information provided on this form.

CREDIT CARD INFORMATION

PAYMENT SUMMARY (In U.S. dollars) Hotel deposit: one night @ $

D MasterCard

D American Express

Card No. Authorized Signature American Express Only: Extended Payment D 3, D 6, D 9, or D 12 months

SEPTEMBER 15, 1997 C&EN

D Late afternoon

D Other (specify)

D VISA

=

$

Transfers and tour deposits are only payable by check. Cancun ground transfers:

Cardholder name (please print)

44

E-mail.

D Location

Continental Plaza

Country _

. Zip/Postal Code.

State/Province _

Expiration date:

transfers @ $10 per person = Tours to Mérida:

people @ $75 per person =

_

Total Amount Enclosed $ _ (In U.S. dollars only)

Technical Program Summary AREA 01 Agrochemistry Symposium title

AREA 04 Computer/Information w\ τ \F \S

(number)

liitlff

Phytochemicals & pharmaceuticals (503) Flavor & chemistry of ethnic (international) foods (504) -i

Food safety (521) Functional properties of food components (547) Structure & properties of lignocellulosic materials (611)

~" International pesticide registration requirements (613) Chemical & biological aspects of beer (630)

(number)

W Τ F

S

W Τ F

S

Chemical information: academic training (520) Internet in the Americas (637)

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Chemistry of kenaf: properties & materials (505) \ '

1

Symposium title

l|iil| 1 Τ "KB ill! lllfll

AREA 05 Education

Il 1

Symposium title

(number)

Microscale chemistry experiments (501) Integrated laboratories (507)

AREA 02 Biochemical/Medicinal/Pharmaceutical

International cooperation & chemistry olympiads (511) Teacher training in high school chemistry (533) Reform in high school chemistry (534)

j Symposium title

(number)

W Τ F

S

Chemical education in 2010 (536)

Chemistry of vanadium compounds (506)

Public outreach of chemistry (538)

| Drug targeting of topoisomerases (509)

Relevant content for general chemistry (540)

j Inhibitors of terpene biosynthesis (512)

Multimedia authorware programs (542)

| Chemical syntheses using biotransformations (518)

Hands-on science for children, students (543)

j Peptides & peptide mimetics (524)

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\ Design of anti-inflammatory drugs (526) j Strategies for decreasing drug toxicity (529)

Workshop on cooperative learning (548)

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Distance education in science, technology (558)

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j Chemicals via higher plant bioengineering (546)

| Chemical intervention in cellular activation (609)

.... Accommodating students with disabilities (614)

j Design & screening of small molecule libraries (557) \ Applications of synthetic carbohydrates (564)

Atomic & molecular structure teaching (544)

ift-

^;r-;

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,-ι

| Nickel in biology & catalysis (612)

AREA 06 Energy/Industrial/Applied/Engineering

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| Inhibition of nitric oxide synthases (619) ; r v •• \ •;"•(••?;:[

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j Oncogenes & antioncogenes in cancer (636)

AREA 03 Business & Economies Applied to Chemistry

[ " j Symposium title

' (number)

(number)

\ Chemistry law & regulations in North America (519)

\W\T\F\S

*! I

S

\ Environmental catalysis (515)

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| Separations science: future directions (545)

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j Heavy crude oil conversion (549)

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j General petroleum refining (550) j Advanced coating processes in manufacturing (559)

Symposium title

j

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j Mixing in industrial chemical processes (573) Food & fermentation chemistry (610) L

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SEPTEMBER 15, 1997 C&EN 4 5

final p r o g r a m

Symposium title

(number)

W Τ F S

Symposium title

(number)

Coating technology (617)

2nd century of carbocation chemistry (517)

Asphaltene & related substances (635)

Supramolecular structures (523)

W Τ F s j

Molecular modeling & theoretical chemistry (551) Natural product synthesis (552) Natural products of biological interest (553)

AREA 07 Environment

Organometallic transformations in synthesis (555) Reactive intermediates: mechanistic organic (556) Cubane compounds: synthesis & chemistry (615)

Symposium title

(number)

W Τ F S

Theoretically interesting molecules (628) Origins of organic matter in early Earth (629)

Pollution prevention through green chemistry (574) Atmospheric chemistry: pollution (608) Portable instrumentation for the environment (620)

AREA 10 Special Topics in Inorganic Chemistry

Remediation of NAPL-contaminated aquifers (621) Oxygenated fuels & urban air quality (623) Industrial cleaning without CFCs (627)

Symposium title

(number)

W Τ F S

Organometallic chemistry of group 3 & f elements (513) Transition-metal group 13 compounds (514)

AREA 08 Macromolecular

Organo-, inorganometallics in materials science (530) Bioinorganic chemistry of metalloproteins (582) Organometallic catalysis (583)

Symposium title

(number)

W Τ F S

Polymers from acetylenic compounds (528) Polymer reactions (576)

AREA 11 Special Topics in Physical Chemistry

Polymers for adhesives (578) Nanostructured materials (605) Characterization of catalytic materials (606) High-performance catalysts & composites (618)

Symposium title

Natural polymers as advanced materials (626)

Functional solids by design (516)

Kinetics & modeling of polymerization (632)

Density-functional theory (525)

Liquid crystalline polymers (633)

Stochastic processes in chemistry (527)

Polymers at surfaces (634)

Dynamics & chemistry of thin-film growth (531)

(number)

Laser control of electrons & molecules (532) Transition-metal clusters & metal-ligand interactions (585)

AREA 09 Special Topics in Organic Chemistry

Surface & interphase phenomena (597) Electrochemical technology (599) Kinetics & reactivity (600) Surface-enhanced Raman spectroscopy (6l6)

Symposium title

(number)

Biocatalysis in organic chemistry (502)

46

SEPTEMBER 15, 1997 C&EN

W Τ F S

Time propagation methods in chemistry (622) Relativistic effects in quantum chemistry (624)

W Τ F S

AREA 12 Special Topics in Analytical Chemistry Symposium title (number)

W Τ F S

AREA 13 Late-Breaking Topics Symposium title (number)

Environmental analytical chemistry (586)

Science policy (561)

Total quality & lab accreditation (587)

SQM awards (562)

Analytical chemistry of the 21st century (589)

Materials chemistry (596)

W Τ F S

Hemispheric scientific cooperation workshop (638)

Exposition Admission to the exposition is complimen­ tary for all 5NACC registrants. While plan­ ning your schedule in Cancun, reserve some time to visit the exposition. In addition to func­ tioning as a showcase for the most up-to-date scientific products and services, the exposition also serves as a valuable source of continuing education for 5NACC attendees. Located on the third level of the Cancun Convention Center, the exposition will be open Wednesday, Nov. 12, and Thursday, Nov. 13, from 8:30 AM to 4:30 PM. The exposition will consist of 34 booths, representing more than 30 companies and organizations displaying a variety of prod­ ucts of interest to chemists. Each exhibiting or­ ganization will have technical personnel present to give demonstrations, answer ques­ tions, and discuss your needs and interests. Admission Requirements. Although admis­ sion to the exposition is complimentary for all 5NACC registrants, your meeting badge will be required to enter the exhibit hall. Free 5NACC Tote Bag. If you're one of the first 2,000 visitors to the exposition, we'll give you a free 5NACC tote bag. Stop by booth num­ ber 34 in the exposition area. Ace Glass, 1430 Northwest Blvd., Vineland, N.J. 08360, (609) 692-3333, fax (609) 692-8919, e-mail: inquiry@aceglass. Exhibiting solid-phase reaction vessels, air-driven vacuum pump, pressure reaction equipment, high-temperature quartz tubes, threaded chromatography columns, hydrogénation glassware, and microscale glassware. 26 American Chemical Society Publications, 1155— 16th St., N.W., Washington, D.C. 20036, (202) 8724600, (800) 227-5558, fax (202) 872-4615, Internet: http://pubs.acs.org. Many of the American Chemical Society's 35 journals and magazines will be displayed along with the latest information on their Internet and CD-ROM availability. Select books will be exhibited. 7 Altus Biologies, 40 Allston St., Cambridge, Mass. 02139-4211, (617) 499-0500, fax (617) 499-2480, e-mail: [email protected], Internet: www.altus.com. Exhibiting CLEC products, which are pure, insoluble, crystalline catalysts that conduct clean chemistry.

CLEC catalysts can be reused and recycled in most reaction environments. Altus' initial products have been developed for chemical manufacturing including pharmaceutical, fine chemical, environmental, agricultural, and biomedical applications. Two product lines include ChiroCLEC catalysts for the resolution of a wide range of chiral compounds and PeptiCLEC catalysts for racemization-free peptide coupling. 5

analyzer, controlled-growth mercury electrode, microelectrodes, cells, and electrodes. DigiSim cyclic voltammetric digital simulation software will be demonstrated with BAS quantitative analysis software. Also on display will be an electrochemical detector for HPLC and flow-injection analysis. Manufactures instruments for electrochemistry, liquid chromatography, and in vivo microdialysis. 18

AXS—Analytical X-Ray Systems, Siemens Allée 84, Karlsruhe 76187, Germany, (49) 721-595-2888, fax (49) 721-595-4346, e-mail: [email protected]. de. Designs and manufactures X-ray systems. Three methods—X-ray fluorescence analysis, X-ray diffraction, and single-crystal diffraction—are used in a wide range of applications, from nondestructive multielemental analysis to determination of molecular structures, textures, and phase analysis. Systems are configured to meet needs in research and development investigation in biotechnology, pharmaceutical, and materials research, as well as in automated production and quality control. 23

Bruker Mexicana S.A. de C.V., Pico de Sorata 280, No. 5, Mexico, D.F. 14210, Mexico, (525) 630-5747, fax (525) 630-5746, e-mail: [email protected]. Bruker Instruments, Manning Park, 19 Fortune Dr., Billerica, Mass. 01821, (508) 667-9580, fax (508) 6673954, e-mail: [email protected]. Presenting advances in instrumentation in the areas of NMR with continuing innovation in the Avance systems; optics with a high level of technology in FTIR, FT-Raman, and FT-near-IR spectroscopy; daltonics with mass spectrometry applications for LC-MS, MALDI, TOF, and FT-MS; EPR with applications for EMS, EMX, and ESP systems that range from simple to demanding; and QA/QC with Minispec, which provides solutions in low-resolution NMR. 20, 21

Bayer Pharmaceutical Division, 400 Morgan La., West Haven, Conn. 06516-4175, (203) 812-2564, fax (203) 812-3188, e-mail: susan.o'connor.b@bayer. com. Pharmaceutical Division has responsibility for the research and development of treatments for cancer, metabolic disorders, rheumatic diseases, infectious diseases, cardiovascular diseases, and dementia. Recruiting for talented M.SJPh.D. chemists with degrees either in synthetic organic chemistry or organic synthesis. 32

Caframo Ltd., RR 2, Airport Rd., Wiarton, Ontario NOH 2TO, Canada, (800) 567-3556, fax (519) 5341088, e-mail: [email protected]. Displaying the new rotary evaporator series LR4000 by Heidolph. This series includes the integrated rotary evaporator designed with vacuum pump, vacuum pump controller, and chiller. Also displaying overhead stirrers and accessories. Models such as the lab standards RZR1, RZR50, and RZR2000 will be displayed. Other products include the new Vortex Mixer Reax. All products have a two-year guarantee and are represented by dealers throughout North America. 4

Beilstein Information Systems, 15 Inverness Way East, Englewood, Colo. 80112-5776, (800) 275-6094, (303) 792-2652, fax (303) 792-2818, e-mail: [email protected]. Presenting CrossFire Abstracts, titles and abstracts from the organic chemistry literature from 1980 to the present. Combined with structure, substructure, and reaction searching navigation through information in the Beilstein database using hyperlinks. CrossFire Abstracts, which is integrated into CrossFireplusReactions, creates a powerful and unique integrated chemoinformatics system. The CrossFireplusReactions system combines a highperformance search engine with the Beilstein database containing information on 7 million compounds, 5 million reactions, and extensive physical property data. The CrossFire system also gives users access to the Gmelin database of inorganic and organometallic chemistry. CrossFire is searchable from a personal computer or a Macintosh. Also exhibiting AutoNom 2.1 Gold with integration with ISIS/Draw and "The Beilstein Handbook for Organic Chemistry." 8

Chemical Abstracts Service, 2540 Olentangy River Rd., Columbus, Ohio 43202, (614) 447-3600, fax (614) 447-3709, e-mail: [email protected]. Publishes Chemical Abstracts, the world's foremost reference journal in the fields of chemistry, chemical engineering, biochemistry, and pharmacology. For 90 years, CAS has covered thousands of research publications comprehensively and thoroughly. For the past 14 years, CAS has offered on-line access to Chemical Abstracts and other pharmaceutical databases through the STN International on-line information retrieval service. STN hosts more than 200 scientific and technical databases, and STN Easy, the new point-and-click Internet-based path to STN, provides convenient access to millions of scientific research records. CAS also offers Chemical Abstracts on CD-ROM, as well as other currentawareness CD-ROM products. 6

Bioanalytical Systems, 2701 Kent Ave., West Lafayette, Ind. 47906, (765) 463-4527, (800) 845-4246, fax (765) 497-1102, e-mail: [email protected], Internet: www.bioanalytical.com. Exhibiting the latest Electrochemistry for the Chemist instrumentation and accessories: model CV-50W Windows voltammetric

Coulter, P.O. Box 169015, Mail Stop 195-10, Miami, Fla. 33116-9015, (305) 885-0131, fax (305) 883-6877, e-mail: [email protected], Internet: www. coulter.com. Exhibiting particle-analysis instrumentation. On display will be the LS 230 enhanced laser diffraction particle-size analyzer with dry-powder and

SEPTEMBER 15, 1997 C&EN 4 7

Elevator

Cancun Convention Center

si 30^

Third Level

29^

10

7 LAIAIAJ Exhibits

12 13 14 15 16 17 18 19 20 21 22 23 24 25

small-volume modules. The SA 3100 surface-area analyzer will also be shown. Offering comprehensive training courses at its Miami location. 24 DowElanco, 9330 Zionsville Rd., Indianapolis, Ind. 46220, (317) 337-3000, fax (317) 337-3257, e-mail: [email protected]. A research-based agri­ cultural company in North America, DowElanco has a Discovery Research organization with a com­ pound acquisition program to obtain compounds for screening. Its interest is in compounds that are nov­ el or untested relative to their bioactivity for agricul­ tural applications. The ultimate goal is to develop discovered activity into useful products. 16 Equipar S.A. de C.V., Juan Sanchez Azcona No. 1447, Col. Del Valle, Mexico, D.F. 03100, Mexico, (525) 605-7400, fax (525) 605-5671, e-mail: [email protected]. Supplier of laboratory, in­ dustry, and quality-control sector needs. Distributes equipment from Cole-Parmer, Τ A. Instruments, Parr, Buchi, Labconco, Barnstead, and others. Of­ fers solutions in thermal analysis, fluid transfer, tem­ perature control, water analysis, spectrophotometry, purification, and pH. 29 Innovative Technology, 2 New Pasture Rd., Newburyport, Mass. 01950, (508) 462-4415, fax (508) 462-3338, e-mail: [email protected]. Exhibiting System One-M glove box and gaspurification system, including oxygen and moisture analyzers. Custom configurations are a specialty. Freezers to -80 °C, cryogenic traps, microscopes, and a complete line of accessories. 15 Jenway, University Park Plaza, 743 Alexander Rd., Suite 10-12, Princeton, N.J. 08540-9659, (609) 9879659, fax (609) 987-0403, e-mail: jenwayinc@aol. com. Worldwide manufacturer of laboratory equip­ ment, including pH, conductivity, dissolved oxy­ gen, and ion-analysis meters; flame photometers; turbidimeters; colorimeters; chloride meters; spec­ trophotometers; fluorimeters; humidity meters; hot plate/stirrers; and temperature meters/probes. Two-year parts and labor warranty, ISO9001 and CE certified. 25 JEOL USA, 11 Dearborn Rd., Peabody, Mass. 01960, (508) 535-5900, fax (508) 536-2205, e-mail: [email protected]. The Eclipse+ NMR Series is avail­ able at 300-, 400-, and 500-MHz field strengths and features a Silicon Graphics workstation as the host computer. The Eclipse+ spectrometer is controlled by easy-to-use Delta software, which runs in a mul­ tiple Windows environment and is mouse driven, much like a PC. The degree of flexibility offered by Delta sets a new standard in the NMR market. Also offering the TE series (100, 200, and 300) of highsensitivity, high-reliability ESR spectrometers that employ a low-noise, high-stability gun diode on a new automatic type of microwave unit. 19 Lancaster Synthesis, P.O. Box 1000, Windham, N.H. 03087, (603) 889-3306, fax (603) 889-3326, e-mail: [email protected]. Pro­ vides specialty organic chemicals in research and semibulk quantities that are sold through the Lan­ caster Synthesis catalog. The 1,500-page catalog

48

SEPTEMBER 15, 1997 C&EN

lists 12,500 organic intermediates that are usually available from stock for immediate shipment. Also offers custom synthesis of organic chemicals on a gram to multikilogram scale. 9 Matec Applied Sciences, 56 Hudson St., Northborough, Mass. 01532, (508) 393-0155, fax (508) 393-5476, e-mail: [email protected]. Exhibiting instrumentation for particle characterization: highresolution submicron particle-size distributions, ideal for OC, by the new CHDF-2000; and the ESA-8000, for zeta potential measurements in concentrates. 14 OLIS: On-Line Instrument Systems, 130 Conway Dr., Suites A & B, Bogart, Ga. 30622, (706) 3536547, (800) 852-3504, fax (706) 353-1972, e-mail: [email protected], Internet: www.olisweb.com. Offers dual-beam, rapid-scanning spectrophotome­ ters configured for absorbance/fluorescence, stopped-flow, and rapid-scanning CD, in addition to stand-alone UV-Vis. Also offers computer interfaces, electronic modernizations, and software for some older spectrometers as well as custom spectrome­ ters for high-speed techniques involving light. 27 Omega Scientific S.A. de C.V., Francisco Marquez No. 20B, Col. Josefa Ortiz de Dominguez, Mexico, D.F. 03430, Mexico, (525) 590-1000, fax (525) 5901577, Internet: www.micromass.co.uk or www. labconco.com. Radiometer analytical systems in four ranges designed to meet current and future needs: MeterLab, reliable and accurate measure­ ments for pH, ion, conductivity, and dissolved oxy­ gen; TitraLab, specific for titration; TraceLab, a trace-level detection partner; and VoltaLab, versatile instrumentation for electrochemistry. Micromass has been providing excellence in MS for more than 25 years, and Labconco excels in helping protect your lab environment. 30 Prous Science, P.O. Box 540, Barcelona, Spain 08080, (343) 459-2220, fax (343) 458-1535, e-mail: [email protected], Internet: www.prous.com. Infor­ mation provider in the fields of R&D, pharmacology, and medical chemistry produces a variety of print and electronic publications. In late 1995, introduced the Internet and has since launched three innovative Internet services. The company has been awarded the European Commission's WWW business award for best site. 12 Puerto Rico Chemists Association, Box 11183, San Juan, Puerto Rico 00922, (787) 753-2027, fax (787) 753-2022. Delivering information on the XXIII Latin American Chemical Congress to be held in Puerto Rico on July 26-31, 1998. 31 Q-Chem, 317 Whipple St., Pittsburgh, Pa. 15218, (412) 828-7106, fax (412) 828-0483, e-mail: [email protected]. Exhibiting the Q-Chem sys­ tem, software that brings together a variety of ad­ vanced computational methods and tools in an inte­ grated ab initio quantum chemistry software package, solving theoretical problems faster than existing sys­ tems with no loss in accuracy of computations. Re­ searchers will now be able to address larger molecu­ lar structures than is currently possible. 22

SGE, 2007 Kramer La., Austin, Texas 78758, (512) 837-7190, fax (512) 836-9159, e-mail: [email protected], Internet: www.sge.com. Exhibiting capillary GC col­ umns and accessories, capillary injectors and split­ ters, ferrules, septa, gas filters, injection liners, mi­ crovolume syringes, glass-lined metal tubing, jet separators, multidimensional systems for GC, and HPLC columns and accessories. 28 Silicon Graphics Computer Systems, 2011 North Shoreline Blvd., Mountain View, Calif. 94039-7311, (415) 960-1980, fax (415) 932-6577, Internet: www.sgi.com/ChemBio. Highlighting the latest work­ station and server technologies including 02 and Octane desktop systems, Origin200/2000 servers, Onyx2 visual supercomputers, and Cray supercom­ puters. Demonstrating advances in 3-D molecular visualization and computational power for molecular modeling, computational chemistry, bioinformatics, chemical databases, and collaborative computing. 3 Sistemas y Equipos de Vidrio, Priv. Universidad de Tamaulipas 1616, Col. Universidades, CP 72589, Puebla, Puebla, Mexico, 52 (22) 333-690, fax 52 (22) 458-665, e-mail: [email protected]. com. Manufacturer of glass instruments, condens­ ers, distillation apparatus, extractor filters, flasks, joints, microscale equipment, and custom-designed systems. Also displaying baths and circulators, evaporators, fume hoods, heating equipment, man­ tles with temperature control, and orbital shakers.W TCI America, 9211 North Harborgate St., Port­ land, Ore. 97203, (800) 423-8616, fax (503) 2831987, e-mail: [email protected], Internet: www. tciamerica.com. Provides custom synthesis and con­ tract research services for the pharmaceutical, cos­ metic, electronic, and biotechnology researcher. Most recent catalog lists more than 13,000 high-purity spe­ cial organic chemicals in packaging convenient for re­ agent usage. Manufacturing facilities offer kilogram- to ton-lot production utilizing many reaction capabilities. Modern facilities can provide cGMP manufacturing and are registered with FDA. Free catalog. 2 TechniKrom, 1801 Maple Ave., Evanston, III. 60201, (800) 865-4100, fax (800) 293-5059, e-mail: [email protected], Internet: www.technikrom. com. Provides engineering solutions and custombuilt equipment for manufacturing processes requir­ ing HPLC, LPLC, buffer preparation, peptide synthe­ sis, and fermentation to attain lowest final perki log ram production cost. Validated (IQ/OQ) industrial equipment reduces manufacturing costs by automating processes (unattended 24 hours per day) through precise feedback and control. Also of­ fers contract method development, scale-up, and purification, as well as technical support by a staff that includes experienced engineers, chemists, and chromatographers. 1 University Science Books, 55 D Gate Five Rd., Sausalito, Calif. 94965, (415) 332-5390, fax (415) 332-5393, e-mail: [email protected]. Exhibiting recently published "Physical Chemistry: A Molecular Approach," by McQuarrie and Simon; "Molecular Mechanics Across Chemistry, " by Rappe and Casewitt; "Spin Choreography: Basic Separations in High-Resolution NMR," by Freeman; "Principles of Bioinorganic Chemistry," by Lippard and Berg; plus many backlist classics. Examination copies will be available. 13 Varian S.A., C. Beistegui No. 109, Col. Del Valle, Mexico, D.F. 03100, Mexico, (525) 523-9161, fax (525) 523-9472, e-mail: [email protected]. mx. Exhibiting instruments for GC, MS, GC/MS, AA, ICP, UV/Vis/near-IR, NMR, and LC. 33 Waters S.A. de C.V., Adolfo Prieto 1634, Col. Del Valle, Mexico, D.F., 03100, Mexico, (525) 524-1590, fax (525) 524-9376. Exhibiting high-performance liq­ uid chromatography systems; Alliance 2690 liquid chromatography columns and precolumns; Symme­ try solid-ρ hase extraction devices, syringe filters, microsyringes, and vials; SEP-PAKs and Gelman spare parts and accessories; chromatography datamanagement systems and networks; and Millenni­ um 32 and Millennium 2020. 11 Wavefunction, 18401 Von Karman Ave., Suite 370, Irvine, Calif. 92612, (714) 955-2120, fax (714) 9552118, e-mail: [email protected]. Provides molec­ ular modeling software for both research and educa­ tion that is easy to use and understand. This soft­ ware is available on all major platforms and provides fully integrated environment for analysis, display, and presentation of complex molecular information. Methods ranging from Merck molecular mechanics to ab initio and BP86 density functional are easily accessed via graphical interface. 17

ADVANCE REGISTRATION 5TH CHEMICAL CONGRESS OF NORTH AMERICA Cancun, Mexico

Nov. 11-15, 1997

Forward this form with payment to: 5NACC Secretariat % American Chemical Society P.O. Box 18598 20th St. Station Washington, D.C. 20036-8598 USA

D Dr. D Mr. • Ms. D Mrs.

Surname

0 3 +0. R. Hernandez, M. Hernan­ dez, E. Carmona, J. Campos, J. Echave, D. Clary 738. Enthalpy of combustion and formation of tetraphenylporphyrin. L. A. Torres. R. Patino, M. Campos Ruiz de la Pena, M. Gruintal 739. Bonding in (arene) M(CO)5 complexes (M = Cr, Mo, W). G. R. Dobson, J. P. Smit, S. Ladogana 740. Pyrolysis of acetone. P. D. Pacey, S. H. Mousavipour

741. Relation between the structure, interac­ tion, and viscoelastic properties of triblock copolymer micelles in aqueous solution. S-H. Chen, Y. C. Liu 742. Organometallic anion hosts. K. T. Holman, J. L. Atwood Analytical Chemistry: General 743. New molecular design of porphyrin as an ultrahighly sensitive chromogenic reagent and its applications to biological and envi­ ronmental samples. T. Kawakami, S. Igarashi 744. New spectrophotometric analysis of ironporphyrin complex based on destructive catalytic reaction. K. Takahata, S. Igarashi 745. TPR-TPD characterization of palladium supported on zinc aluminate catalysts. (Sp) R. Flores, M. A. Valenzuela, G. Silva, P. Bosch 746. Simultaneous determination of methyl tert-butyl ether and fert-amyl methyl ether in gasoline by gas chromatography-mass spectrometry. (Sp) J. A. Garcia Martinez 747. Physical and chemical study of heavy metals to determine the type of alimentation in the Pleistocene period in Mexico. (Sp) G. Osuna, P. Quevedo, G. Romero 748. Application of the bivarriante spectrophoto­ metric method for the determination of aspirin and caffeine. (Sp) P. L. Lopez-de-Alba, L. Lopez-Martinez, L. I. Michelini-Rodriguez, J. Amador-Hemandez, K. Wrobel-Zasada, K. Wrobel-Kaczmarczyk 749. Simultaneous fluorimetric determination of pyridoxal, pyridoxamine, and pyridoxic acid by PLS-1 method using nonlinear vari­ able angle synchronous spectra. J. J. Berzas, J. A. Murillo, J. Amador, M. A. Gomez 750. Magnetic properties of metal clusters. L. N. Mulay Centro de Convenciones Bacalar 4 Symposium on General Petroleum Refining (550) 751. Catalytic properties of MCM-41 materials in isobutane-butenes alkylation and 2-propanol dehydration reactions. M. GomezCisneros, G. Carrizales-Martinez, G. Sandoval-Robles, J. M. Dominguez-Esquival 752. Synthesis and characterization of Al-Zr mixed oxides prepared by sol-gel methods and their use in HDT and alcohol dehydra­ tion catalytic reactions. J. L. Hernandez, G. Sandoval, J. M. Dominguez 753. Study of the precursors and properties of hydrothermally stable pillared clays. A. Lopez-Ortega, J. M. Dominguez, A. RojasHernândez, A. Benitez-Patricio, M. Salmon 754. Synthesis, characterization, and evaluation of catalytic properties of mesoporous materials MCM-41 and MCM-48. E. Terrés, J. M. Dominguez, S. Ramirez, A. Toldedo 755. Influence of sulfation and fluorination of aluminophosphates (AIP04-5) on the isomerization of 1-butènes. F. A. Hernandez, G. Carrizales, G. Sandoval, J. M. Dominguez, R. I. Conde 756. Effect of Mo on alumina acidity in the 2-propanol dehydration. M. I. Lezama-Rodriguez, R. Silva-Rodrigo, P. Salas-Castillo, A. Vazquez-Rodriguez, G. Sandoval-Robles, S. Robles-Andrade, M. L. Durân-Martinez 757. Partial oxidation of η-butane on VPO cat­ alyst doped with Fe. R. Garcia-Alamilla, S. Robles-Andrade, G. Sandoval-Robles 758. Apidic acid from cyclohexane in a single stage. R. Garcia-Alamilla, S. Robles-And­ rade, G. Sandoval-Robles 759. HDS and HDN of vacuum heavy gas oil by transition-metal nitrides. J. A. MeloBanda, J. Dominguez-Esquivel, G. San­ doval-Robles, A. Castillo-Mares, D. Acosta, E. Lopez-Salinas, M. Sanchez-Garcia 760. Hydrocracking reduction using Wox on Pt/Al 2 0 3 reforming catalyst. J. L. Con­ treras, G. A. Fuentes Energy/lndustrial/Applied/Engineering: General 761. Decrease of phenolics contents in canola meal. K. Lacki, Z. Duvnjak 762. Fermentation conversion for food pro­ duction. M. Moo-Young, Y. Chisti 763. Evaluation of brewer's spent grain as a renewable feedstock for fuel ethanol pro­ duction. K. L. Kadam, R. E. Landucci, M. A. Yancy, F. T. Varani

764. Alkylation of benzene with propylene to produce cumene over sulfonic acid resins as catalysts. (Sp) J. Alcaraz-Cienfuegos, C. Islas-Flores, M. Hernândez-Luna 765. Determination of precious metals using the neutron activation analysis technique. L. C. Longoria, H. Arriola, J. N. Mènera 766. Modeling of osmotic dehydration. (Sp) P. Genina-Soto, R. M. Castellanos, G. F. Gutierrez 767. Functional properties of hydrolysates from proteolysis of denatured plant proteins. (Sp) R. Briones-Martinez, M. I. CortésVazquez 768. Myofibrillar proteins hydrolysis with hemisphaericin. M. I. Cortés-Vâzquez, R. BrionesMartinez 769. Dispersion-free solvent extraction and SLM separation of Cd(ll) and Pb(ll) using macrocyclic compounds as carriers. J. C. Aguilar, J. De Gyves 770. ELG approach to measure cabron formation over a catalyst during operation. F. P. Ramirez-Garcia, M. E. Cortés-lslas, J. D. Nunez-Martinez, E. Sânchez-Acufia, J. L. Padilla-Larios 771. Fundamental approach to lower sulfur content in FCC gasoline through desulfurization of the heavy naphtha. E. AguilarRodriguez, A. Moreno-Tovar, R. NaresOchoa, J. Cuéllar-Mata 772. Catalyst deactivation in a commercial vacuum gas oil hydrodesulfuhzation unit. M. Amemiya, K. Date 773. Radiation sensitivity of cyanocobalamin. X. Juanchi, G. Albarrân, A. NegronMendoza 774. Features of Pd/Ni-substituted Y-type zeolite in hydrodesulfuhzation. M. Nomura, K. Kaneda, T. Wada, S. Murata 775. Model for diffusion and reaction in systems with solid deposition. J. O. Marroquin, J. A. Ochoa, T. Viveros 776. Transient behavior of the effectiveness factor in a CSTR. J. O. Marroquin, J. A. Ochoa, T. Viveros 777. Approximate effectiveness factors for systems with key reagent depletion. J. O. Marroquin, J. A. Ochoa, T. Viveros 778. Computational simulations of first-order and continuous-phase transitions. (Sp) G. Amaya 779. Thermal modeling of phase changes of refrigerant in a pressure vessel. S. EstradaFlores 780. Finite element method approach of milk microwave pasteurization. (Sp) G. Amaya, S. Martinez 781. Comparison of different methods for the prediction of the interaction pair parameter in a cubic equation of state. (Sp) A. J. Austrich S., F. Hernandez P., R. Aguilar E., A. Salas P. 782. Detection of trace elements in colorectal cancer by NAA. H. Arriola, L. C. Longoria, A. Quintero, M. Gutierrez 783. Silicon's effect as agent of acidity in PtRe and Pt-Sn catalysts for reforming naphtha. (Sp) J. M. Bautista, M. L. Ramirez, R. Zârate, O. Bermudez 784. Impact of environmental legislation on the transport sector and refining industry in Mexico. G. Bazan, S. Castillo, M. MoranPineda, L. Gonzalez 785. On the solid-phase extraction of Cu(ll), Cd(ll), Pb(ll), Zn(ll), and Fe(lll) by chemically modified silica gel. J. P. Bernai, J. De Gyves 786. Thermodynamics of liquid-vapor equilibria of acid gases alkanolamine-water systems. (Sp) E. Buenrostro Gonzalez 787. Technology updating and new catalysts development for resid feedstocks hydrocracking. (Sp) M. T. Cortez, R. Medellin, T. A. Beltrân, E. Galvân, R. Zârate, O. Bermudez 788. Two syntheses of 4,4'-methylene bis (2chloraniline): The choice of a chemical route. M. Cruz Morales, L. A. ReyesChumacero, J. Noriega-Bemechea 789. Health parameters and low dose effects. M. E. Cortés-lslas, F. P. Ramirez-Garcia Centro de Convenciones Cozumel 2 Symposium on Phytochemicals and Phytopharmaceuticals (503) 790. Radical scavenging activity of Maillard reaction compounds. M. Kawane, Y. Yoshiki, K. Okubo

791. Radical scavenging activity of horseradish peroxidase associated with gallic acid. Y. Yoshiki, K. Okubo 792. Active oxygen scavenging compounds isolated from adzuki beans. T. Ida, Y. Yoshiki, K. Okubo 793. Steroidal saponins from asparagus and their biological activity. Y. Shao, C-K. Chin, C-T. Ho, M-T. Huang 794. Antioxidative and cytotoxic phenolic glycosides from the leaves of Rosmarinus officinalis L. Y. Shao, M. Wang, C-K. Chin, M-T. Huang, C-T. Ho 795. Isolation of antioxidative fractions from betle leaves (Piper betle L.). N. Andarwulan, T. J. Susanto, R. Syarief 796. Antioxidants of evening primrose. F. Shahidi, M. Wettasinghe, R. Amarowicz, A. Khan 797. Brassica phytoalexins and analogs: Tricking fungal phytopathogens. M. S. C. Pedras, A. Q. Khan, F. I. Okanga 798. Extraction, isolation, and identification of quinolizidine alkaloids. (Sp) G. O. Davila, J. H. Martinez Agrochemistry: General 799. Proximal chemical composition of proteic concentration of the blood plasma of bovine. A. Cortes, R. Castellaneous, F. Martinez, C. Cruz 800. Effect of some secondary metabolites from Helianthella quinquenervis on respiration, germination, and biomass production of three weed species. (Sp) P. Castaneda, R. Mata, Β. Lotina-Hennsen 801. Fodder tree chemical composition in the Altiplano Central Mexicano. L. Morfin-Loyden, D. Camacho-Morfin 802. Lipid chemical deterioration in frozen pork and chicken meat. P. Balarezo, F. Iturbe 803. Thermal generation volatiles in roselle. S-H. Chen, T-C. Huang, C-T. Ho, P-J. Tsai 804. Hydrodynamics and drying kinetics stud­ ies of peas (Pisum sativum) in a continuous fluidized bed dryer. (Sp) J. N. LizarragaCamacho, T. Santiago-Pineda, G. F. Gutier­ rez-Lopez, M. Mendoza-Vizcarra 805. Sorption isotherms in commercial bread's powder. (Sp) M. E. Mascorro-Cortes, H. Y. Hemandez-Unzon 806. Metabolism of fenbuconazole in goat and hen. A. K. Sharnia, H. Schuck, C. A. Schieber, L. Mazza 807. Instant pozole. (Sp) L. E. Olguin-Martinez, A. M. Ramirez-Schoettlin.T. Favela-Torres, I. Rojas-Hernandez, I. Esquivel-lbarra 808. Chemical composition of the edible grasshopper (Sphenarium purpurascens). S. E. Valdes-Martinez, E. Vilchiz-Jaimez, C. Moreno-Ramos, A. Vazquez-Mora 809. Fatty acid composition of the grasshop­ per's fat {Sphenarium purpurascens) deter­ mined by gas chromatography-mass spec­ trometry. S. E. Valdes-Martinez, E. VilchizJaimez, R. Miranda, C. Moreno-Ramos, A. Vazquez-Mora 810. Tomato dessert. (Sp) L. Olguin-Martinez, A. Ramirez-Schoettlin, L. Rojas-Her­ nandez, A. H. Vela, T. Favela-Torres, I. Esquivel-lbarra 811. Production of defense aldehydes C6-C9 due to thermal stress in Agave tequilana. A. Orozco, T. Ogura, E. Legorreta, L. Soffchi, L. Salinas, I. Kubo 812. Determination of fat from meat, dairy, and egg products using an open-vessel micro­ wave-assisted process (MAP) method. J. R. J. Paré, G. Matni, V. A. Yaylayan, J. M. R. Bélanger 813. Chocolate malted milk shake imitation. (Sp) P. P. Oliverio, P. O. Pacheco, M. J. E. Mendoza, B. M. Quiroz, G. J. Ortiz, H. B. Barragan 814. Microwave-assisted extraction of fatty acids and cholesterol derivatives from silkworms and earthworms. J. R. J. Pare, V. A. Yaylayan, G. Matni, J. M. R. Bélanger, G. C. Hsiung 815. Elaboration of a light sausage: Adding substitutes by means of starch. Β. Μ. Qui­ roz, P. M. Mendoza, M. J. Mendoza, P. O. Pacheco, G. J. Ortiz, H. B. Barragan 816. Susceptibility of immature Ixodes scapularis (Acari: Ixodidae) to plant-derived acaricides. N. A. Panella, J. Karchesy, G. O. Maupin, J. C. S. Malan, J. Piesman 817. Fibroham: Technology for the develop­ ment of a ham modified with dietetic fiber. M. J. Mendoza, Β. Μ. Quiroz, P. O. Pache­ co, H. B. Barragan, G. J. Ortiz, C. J. Sotelo

818. Zinniol and related phytotoxins from Alternaria tagetica: Spectroscopic assign­ ment and structure-activity correlations. M. M. Gamboa-Angulo, F. Alejos-Gonzalez, K. Garcia-Sosa, F. Escalante-Erosa, G. Delgado-Lamas, L. M. Pena-Rodriguez 819. Pavo-ham: "Light" turkey ham. Β. Μ. Qui­ roz, M. J. Mendoza, H. B. Barragan, P. O. Pacheco, G. J. Ortiz, C. J. Sotelo 820. Chemical and functional properties of globin protein from bovine blood. (Sp) C. Gomez-Juarez, R. M. Castellanos 821. Cheese and pineapple ham. (Sp) A. M. Ramirez-Schoettlin, L. Olguin-Martinez, T. Favela-Torres, L. Rojas-Hernandez, J. E. Mendoza-Madrid, Β. Μ. Quiroz 822. Wastewater irrigation effects on soil and horticultural production. L. B. Reyes, P. Gonzalez 823. Estrogen receptor binding, cholesterol lowering, and bone metabolic effects of representative environmental estrogens. J. A. Dodge, A. L. Glasebrook, L. L. Short, D. L. Phillips, M. Sato, D. E. Magee, H. U. Bryant 824. Casos de intoxicacion por el uso inadecuado de plaguicidas. (Sp) L. A. Alba, F. G. A. Olaiz, H. J. Papaqui, G. M. Capetillo, C. N. Chavando 825. Removal of unstable protein in grape juice and wine by adsorbent resins. Β. Η. Gump, C-F. Huang 826. Process status in a continuous process. A. Skoglund, A. Brundin, C. Mendenlus 827. Volatile compounds formed from various sugars with β-alanine in a dry heat system. S. Nishibori, T. Osawa, S. Kawakishi 828. Aristolochia aff. orbicularis Duchr essen­ tial oil: Composition and effect on Sitophilus zeamais. (Sp) R. M. Guillen, J. Rauscher, G. Gonzalez, M. Albores, O. Vostrowsky, A. Gomez Campos 829. Callus culture of Aristotelia chilensis: Growth and indole alkaloid production. C. Cespedes, M. Silva, M. Bittner, J. Jakupovic 830. Quality control of organic matter deter­ mination for obtaining certification of a lab­ oratory of agricultural chemistry. (Sp) F. M. Leon-Rodriguez, A. Aguilar-Marquez, A. Aguirre-Gomez, J. Garibay-Bermudez 831. Effect of coordination compounds of Co(ll) with ethyl 4-methyl-5-imidazole carboxylate on photosynthesis, respiration, and germination. (Sp) B. King-Diaz, J. Montes-Ayala, N. Barba-Behrens, R. Iglesias-Prieto, B. Lotinna-Hennsen 832. Analysis of RH-2485 (methoxyfenozide) residues in milk using extraction by matrix solid-phase dispersion (MSPD) by HPLC and LC/MS. S. Wu, C. K. Hofmann Symposium on Chemistry, Biochemistry, and Therapeutic Applications of Vanadium Compounds (506) 833. Vanadium(V) equilibria: Stability con­ stants and thermodynamic quantities for the various ionic species. J. J. Cruywagen, J. B. B. Heyns, A. N. Westra 834. Estimating formation constantsforvanadium(V)-pentose complexes. D. C. Crans, F. Xin 835. Solution chemistry of bis(1,2-dimethyl-3hydroxy-4-pyhdinonate)oxovanadium(IV) in water. M. Rangel, M. Castro, W. Schlindwein, R. Matia, B. Castro, C. Geraldes, J. Burgess 836. Synthesis and characterization of trigo­ nal bipyramidal vanadyl complexes: Struc­ tural and electronic constraints on molecu­ lar geometry. C. R. Cornman, K. M. Geiser-Bush, P. D. Boyle 837. Reactions of vanadate with thiol com­ pounds: Complex formation and redox chemistry. D. C. Crans, B. Zhang, A. D. Keramidas, F. Xin 838. Composition and structure of vanadium(V) peroxo complexes. P. Schwendt, M. Sivak 839. From the speciation of peroxovanadium complexes in aqueous solution to the chem­ istry of haloperoxidases. V. Conte, F. Di Furia, S. Moro 840. Bis-peroxo-oxovanadium(V) complexes of histidine-containing peptides as models for vanadium halo-peroxidases. J. A. Guevara-Garcia, G. Mendoza-Diaz, N. BarbaBehrens

841. Vanadium chloroperoxidase models: Solvent dependence of chloride oxidation rates by vanadate. C. Slebodnick, G. J. Colpas, V. L. Pecoraro 842. Catalytic oxidations with biométrie vanadium systems. I. W. Arends, R. A. Sheldon 843. Application of vanadium peroxidases as novel biocatalysts. H. B. ten Brink, W. Hemrika, H. L. Dekker, H. E. Schoemaker, R. Wever 844. Exploring the active site of vanadium chloroperoxidase. R. Renirie, W. Hemrika, H. L. Dekker, P. Barnett, R. Wever, E. C. Slater 845. Possible role for amavadine in some Amanita fungi. C. M. M. Matoso, A. J. L. Pombeiro, J. J. R. Frausto da Silva, M. F. C. Guedes da Silva, J. A. L. Silva 846. What is the active vanadium species inhibiting growth of S. cerevisiae in high phospate growth medium? G. R. Willsky, D. Crans 847. Determination of the vanadate-mediated NAD(P)H or NADH oxidation mechanism by superoxide radical. I. Nieves-Martinez, C. J. Olivo-Delgado, R. P. Mason 848. Influence of vanadate on glycolysis, intracellular sodium, and pH in perfused rat hearts. C. F. G. C. Geraldes, M. M. C. A. Castro, R. Ramasamy, A. D. Sherry 849. Vanadate and pervanadate stimulate glucose uptake in L6 skeletal muscle cells by a mechanism independent of phosphatidylinositol 3-kinase and protein kinase. I. G. Fantus, E. Tsiani, A. Sorisky 850. New vanadium coordination compounds in the treatment of diabetes-induced rats. J. A. Guevara-Garcia, E. Brambila Colombres, E. Gonzalez-Vergara, R. TapiaBenavides, C. E. Weinmann, B. Reyes Perez, J. Robles Aguila Biochemical/Medicinal/Pharmaceutical: General 851. Tyrosine phosphorylation pattern induced by vanadium derivatives in osteoblasts. (Sp) S. B. Etcheverry, A. M. Cortizo, V. C. Salice 852. Mechanism of accumulation of vanadium by ascidians: Some progress toward an understanding of this unusual phenomenon. H. Michibata 853. Synthesis of mercaptoacetyltriglycine analogs. (Sp) M. V. Albores, O. R. Martinez 854. Chloroplast movements during periods of strong irradiation of Vallisneria spiralis. F. A. Garcia, J. F. Arroyo 855. Synthesis and biological evaluation of new antiandrogens. E. Bratoeff, G. Flores, Ε. Ramirez, Ν. Valencia 856. New nifurtimox and benznidazole analogs: Synthesis and activity against Trypanosoma cruzi. J. Carballo P., R. Pozas H., L Reyes T., P. Melchor M., J. Rubio L, C. Castro H. 857. Synthesis and biological activity of 1-methylbenzimidazoles against Trichinella spiralis. R. Castillo, R. Sanchez, R. Cedillo, A. Her­ nandez-Campos, F. Hernandez-Luis, L. Yepez, R. Morales, N. Viveros, O. Munoz 857a. Development and validation of HPLC method for quantification lysine clonixin in plasma. (Sp) L. Diaz, I. Fuentes 858. Biological and chemical study of Aristolochiaceae of Mexico. O. Espejo, A. LiraRocha, E. Naranjo-Rodriguez, F. Aguilar F., M. Chinchot F., F. Vargas, V. Solano-Mendez 859. Synthesis and fasciolicidal efficacy of a triclabendazole isotere. A. Hernandez-Cam­ pos, R. Castillo, F. Hernandez-Luis, Y. Vera, F. Ibarra, E. Garcia 860. Preparation of potential pro-prodrugs of methyl 5-carboxy-1 H-benzimidazole-2-carbamate. F. Hernandez-Luis, H. GarridoHemandez, E. Alcantara-Priego, A. Hernan­ dez-Campos, R. Castillo 861. Chemical structure and biological activ­ ity relationships of melatonin analogs. A. Lira-Rocha, O. Espejo, Ε. Β. Naranjo-Rodri­ guez, C. Reyez-Vazquez, M. Mendez-Diaz 862. Novel bisintercalating anthracyclines. W. Priebe, J. B. Chaires, T. Przewloka, I. Fokt, Y-H. Ling, A. H-J. Wang, G. Grynkiewicz, R. Perez-Soler 863. Production of phenolic compounds in response to UV-A and heavy metals in seedlings of Acer saccharum and A. platanoides. A. M. Zobel, P. A. Clarke, J. M. Lynch, T. Switzer

SEPTEMBER 15, 1997 C&EN 5 9

THURSDAY/TECHNICAL PROGRAM

THURSDAY MORNING Session 1 Area 01—Agrochemistry Hotel El Camino Real Camino Real III Symposium on Flavor Chemistry of Ethnic (International) Foods (504)

F. Shahidi, A. Sotelo Lopiz, Presiding 9:00—Introductory Remarks. 9:05—864. Flavor and functional properties of extruded blue Hopi corn. J. A. Maga, W-C. Sung, D. L. Johnson 9:35—865. Volatile compounds formed from various sugars with β-alanine in a dry heat system. S. Nishibori, T. Osawa, S. Kawakishi 9:55—866. Tequila aroma. M. G. Lopez 10:15—Intermission. 10:35—867. Changes in flavor-related com­ pounds in meat treated with organic acids. I. Guerrero, H. Escalona, S. Ogden, A. J. Taylor 10:55—868. Phenolic compounds in black tea liquors. E. Ponce, A. J. Taylor 11:15—869. Flavor volatiles of cured and uncured seal meat. F. Shahidi, M. Liu, R. B. Pegg Centro de Convenciones Xcaret 1 Symposium on Structure and Properties of Lignocellulosic Materials (611) Characterization of Material Properties of Lignocellulosics

B. J. W. Cole, Presiding 9:00—870. Prediction of pulp strength prop­ erties using spectroscopy and multivariate data analysis. U. Edlund 9:30—871. Lignin analysis by permanganate oxidation. R. C. Francis, S. K. Bose, K. L. Wilson, D. H. Pugliese 10:00—872. Isolation and characterization of residual lignin. T. L. Tamminen, B. R. Hortling 10:30—873. Lignocellulosic materials separa­ tion and structure evaluation on the basis of experimental shear deformation under highpressure treatment and general fractalgeometry methodology. J. Gravitis, A. Kokorevics, R. Teeaar 11:00—874. Atomic force microscopy of cot­ ton fibers. T. C. Pesacreta, L. C. Carlson, B. A. Triplett 11:30—875. Surface energy characterization of wood particles by contact angle analy­ sis and inverse gas chromatography. D. J. Gardner, W. Tze, Q. Shi 12:00—876. Chemical modification of ligno­ cellulosic fibers and polymers: Why, how, and how much? W. G. Glasser, R. K. Jain

11:40—882. Pharmacokinetics of vanadium following oral dosing with vanadyl sulfate in patients with NIDDM. G. R. Willsky, A. B. Goldfine, C. R. Kahn, P. J. Kostyniak 12:00—883. Vanadium salts in the treatment of human diabetes mellitus. C. R. Kahn, A. B. Goldfine Centro de Convenciones Cancun 1 Symposium on Chemical Synthesis Using Biotransformations (518)

D. R. Dodds, Presiding 9:00—Introductory Remarks. 9:05—884. Enzymatic synthesis of biologi­ cally active oligosaccharides. M. M. Palcic 9:40—885. Molecular evolution of enzymes and metabolic pathways by DNA shuffling. J. Minshull, W. P. C. Stemmer, A. Crameri 10:15—Intermission. 10:35—886. Methods of immobilization. W. Tischer 11:10—887. Application, purification, and char­ acterization of (S)-carbonyl reductase from Ζ rouxii. M. Zmijewski Centro de Convenciones Cozumel 5 Symposium on Peptide and Peptide Mimetics (524) Biochemical, Structural, and Design Aspects

G. Lajoie, L. Possani, Presiding 9:00—888. Engineering peptide ion chan­ nels. A. Woolley, L. Lien, D. Jaikaran, A. Starostin, A. James 9:40—889. Analysis and design of ion-channel proteins. W. F. DeGrado, J. D. Lear, G. R. Dieckmann, J. Schneider, L. H. Pinto, C. S. Gandhi, R. A. Lamb 10:20—890. Design of cyclic antibacterial peptides through structure-activity relation­ ships. B. Hodges, L. H. Kondejewski 11:00—Intermission. 11:10—891. Protein domain minimization: Moving from energetic hot spots to potent peptide mimetics. W. L. DeLano, A. C. Braisted, J. A. Wells 11:50—892. Bonding combinatorial libraries. A. Krantz Centro de Convenciones Cancun 3 Symposium on New Advances in Design of Anti-inflammatory Drugs (526)

A. Marfat, Presiding 9:00—893. Structure-based design of stoichio­ metric inhibitors of human nonpancreatic se­ cretory phospholipase A2. E. D. Mihelich 9:40—894. Phosphodiesterase 4 (PDE4) in­ hibitors as anti-inflammatory agents. T. J. Torphy 10:20—Intermission. T. Torphy,

Area 02—Biochemical/Medicinal/ Pharmaceutical Centro de Convenciones Xcaret 2 Symposium on Chemistry, Biochemistry, and Therapeutic Application of Vanadium Compounds (506)

D. C. Crans, Presiding 9:00—877. Coordination chemistry of insulinmimetic vanadium compounds. C. Orvig, J. H. McNeill 9:30—878. On the insulin-like effects of vana­ dium salts. Y. Shechter, G. Elberg, N. Sekar, Z-B.He, D. Gefel, J. Meyerovitch, R. Bruck, E. Gershonov, A. Shishevia, D. C. Crans, R. Segar, M. Fridkin, Y. Goldwasser, J. Li 10:00—Intermission. 10:10—879. Vanadium bioactivity on cells in culture. S. B. Etcheverry, A. M. Cortizo 10:4—880. Mechanism of action of peroxovanadium compounds. B. I. Posner, A. Shaver 11:10—881. Structure-activity relationships of the insulin-mimetic vanadyl complexes. H. Sakurai

60

SEPTEMBER 15, 1997 C&EN

10:05—900. Production of capsaicin by in vitro chili pepper {Capsicum annuum L.) cultures. N. Ochoa-Alejo 10:35—Intermission. 10:55—901. Biochemical and molecular tools for the production of useful terpene prod­ ucts from Capsicum annuum. E. LozoyaGloria 11:25—902. Strategies to improve isoprenoid yield in plant cell cultures. A. C. RamosValdivia, R. van der Heijden, R. Verpoorte 11:55—903. Use of hairy roots for the produc­ tion of chemicals. V. M. Loyola-Vargas

Presiding

10:30—895. Potential clinical and pharmaco­ logical implications of PDE4 inhibition. J. Cheng, J. Pillar, J. Umland, J. Shirley 11:10—896. Development of potent type IV phosphodiesterase inhibitors for the treat­ ment of bronchial asthma in humans. D. Pon, M. Plant, N. Stallwood, E. Muise, J. Tkach, M. Cirino, Z. Huang, P. Masson, C. Savoie, L. Boulet, I. W. Roger 11:50—897. 7-Oxo-4,5,6,7-tetrahydro-1 H-pyrazolo[3,4-c]pyridines as novel inhibitors of phosphodiesterase 4. A. J. Duplantier, C. J. Andresen, J. B. Cheng, V. L. Cohan, C. Decker, F. M. DiCapua, K. G. Kraus, K. L. Johnson, C. R. Turner, J. P. Umland, J. W. Watson, R. T. Wester, A. S. Williams, J. A. Williams Hotel El Camino Real Camino Real IV Symposium on Chemicals via Higher Plant Bioengineering (546) A. Lopez,

Presiding

9:00—Introductory Remarks. 9:05—898. Novel fatty-acid profiles of oil­ seeds for the year 2005. K. Downey 9:35—899. Recombinant protein production in plant seeds using oleosin partitioning technology. M. M. Moloney

Area 03—Business and Economics Applied to Chemistry Fiesta Americana Coral Beach Coral Island II Symposium on Impact of Laws and Regulations on the Utilization of Chemistry in North America (519) Ο. Μ. Becerril,

Presiding

9:00—904. Impact of NAFTA on Mexican trade­ mark legal system. A. Lopez-Velarde 9:35—Panel Discussion. R. B. Racine 11:10—Intermission. 11:20—905. Availability of environmental tech­ nology for the chemical industry in develop­ ing countries: What should be done to im­ prove environmental conditions? L. M. Guerra 11:55—906. NAFTA and the environment. G. C. Kubrick

Area 05—Education Centro de Convenciones Isla Mujeres 3 & 4 Symposium on International Cooperation Based on the Chemistry Olympiad (511)

C M . Castro-Acuna, Presiding 9:00—Introductory Remarks. 9:05—907. Chemistry Olympiads in Mexico, 1992-97. C. M. Castro-Acuna, A. DosalGomez 9:35—908. Chemistry curriculum within the International Chemistry Olympiads. R. D. Cook 10:05—909. Selecting students for the USNCO-lab practical development. M. Tinnesand 10:35—910. Organization of an International Chemistry Olympiad. R. D. Cook 11:05—911. Goals and strategies for the U.S. National Chemistry Olympiad program. L. P. Eubanks 11:35—912. Experimental aspects in Chem­ istry Olympiad programs. M. A. Dosai 12:05—Concluding Remarks. Centro de Convenciones Isla Mujeres 1 & 2 Symposium on Multimedia Authorware Programs (542)

R. Sandoval Marquez, Presiding 8:50—Introductory Remarks. R. Sandoval 9:00—913. Multimedia does make a differ­ ence. J. Kotz 9:40—914. Web and CD-ROM-based chemis­ try simulations. W. Vining, R. Day, B. Botch, D. Hart, B. Woolf 10:30—915. Uses and abuses of multimedia in the large general chemistry lecture. P. Kelter, T. Johnson, J. Gundman, J. Carr 11:10—916. Multimedia in the faculty of chemistry. R. Sandoval 11:40—917. Introductory college-level chem­ istry and physics on a CD-ROM. B. Sanc­ tuary Centro de Convenciones Cozumel 1 Symposium on New Trends in Atomic and Molecular Structure Teaching (544) Theoretical Chemistry Research in the Teaching of Modern Chemistry

R. G. Parr, Presiding 9:00—Introductory Remarks. 9:05—918. Density-functional theory: A tool for researchers and educators. L. J. Bartolotti

9:35—919. Integration of formal training and research in "molecular modeling curricu­ lum. A. Tropsha 10:05—920. Density-functional theory con­ cepts of chemical reactivity. J. L. Gâzquez 10:35—Intermission.

W. Yang, Presiding 11:00—921. Chemistry in terms of property and current densities from the action principle. R. F. W. Bader 11:30—922. Atomic and molecular structure teaching at the high school level. P. Sosa 12:00—923. Symbolic mathematics in the quantum chemistry classroom: The UAM-I experience. A. Vela, J. Garza

Area 06—Energy/lndustrial/Applied/ Engineering Fiesta Americana Coral Beach Coral Garden I Symposium on Separations Science: Directions for the Future (545)

J. Palacios, Presiding 9:00—Introductory Remarks. 9:05—924. Polymer-supported reagents and their application to metal-ion separations. S. D. Alexandratos 9:35—925. Metal-ion separations with protonionizable lariat ethers. R. A. Bartsch, V. J. Huber, S. N. Ivy, J. Lu, W. Walkowiak 10:05—926. Solvent extraction and electrowinning recovery of copper in cyanide solutions. D. B. Dreisinger 10:35—Intermission. 10:50—927. Cation separations by polymeric membranes. J. de Gyves, E. Rodriguez de San Miguel 11:20—928. Recovery of copper, cobalt, and zinc from the Boleo property in Mexico. R. E. Molnar, C. A. Fleming, C. J. Ferron, J. M. Lommen, D. B. Dreisinger 11:50—929. Models applied to chemical separations. M. Torres Hotel El Camino Real Camino Real V Symposium on Heavy Crude Oil (549) Production Geochemistry

K. E. Peters, Presiding 8:30—Introductory Remarks. 8:35—930. Field allocation of pipeline oils using oil fingerprints. R. J. Hwang, D. K. Baskin, S. C. Teerman 9:00—931. Geochemical characterization of the Dom Joâo oil field, Recôncavo Basin, Brazil. L. A. F. Trindade, J. R. Cerqueira, A. M. P. Mizusaki, R. L. A. Santos, R. P. Philp 9:25—932. Use of metal organic complexes in crude oils for defining reservoir compartments, quantifying contributions from multiple zones, and detecting asphaltene precipitation. S. D. Olsen, I. Horstad, D. Brincat, S. R. Larter 9:50—933. Multiparameter statistical approach for geochemical definition of reservoir compartments: Centro Lago Field, Venezuela. L. W. Elrod, K. K. Bissada, J. E. Lacey, L. Vierma, P. A. Kelley 10:15—Intermission. 10:25—934. Pattern recognition techniques in petroleum geochemistry. L. S. Ramos, B. G. Rohrback 10:50—935. Predicting diamond molecular behaviors for gas processing planning. R. Lin, P. N. Taylor, T. C. Ratcliffe, R. Gamble 11:15—936. Time-dependent changes in waxes and asphaltenes during oil production. R. P. Philp, E. Chouparova 11:40—937. Plant biomarkers in biodegraded crude oil and their application to identifying mixtures of crude oils. R. Alexander, T. P. Bastow, R. I. Kagi 12:05—938. Mixed marine and lacustrine input to an oil-cemented sandstone breccia from Brora, Scotland. K. E. Peters, M. Clutson, G. Robertson 12:30—939. Niger Delta, Nigeria: Petroleumfilling history of multireservoir fields from

geochemical study of oil and gas accumulations. C. M. Ekweozor

Centro de Convenciones Xcaret 4 Symposium on Mixing in Industrial Chemical Processes (573)

R. S. Brodkey, F. Muzzio, Presiding 8:30—940. Impact of fat crystals on the coalescence rates of oil drops. A. W. Nienow, A. W. Pacek, A. J. Nixon 9:00—941. Evolution of the microstructure and rheology of o/w emulsions during the emulsification process. M. C. Sanchez, A. F. Guerrero, E. Brito de la Fuente, C. Gallegos 9:30—942. Mixing in pneumatically agitated multiphase contactors. M. Moo-Young, Y. Chisti 10:00—943. Mixing of a four-phase model fermentation system involved in the production of aroma compounds. A. Sanchez, L. Serrano, E. Galindo 10:30—944. Solid-liquid mass transfer in a shaking-vessel-type bioreactor with current pole. Y. Kato, S. Hiraoka, Y. Tada, T. Nomura 11:00—945. Oxygen transfer efficiency of a helical ribbon-flat blade turbine impeller in non-Newtonian liquids. A. Tecante, N. Chavarria-Hernândez, E. Brito de la Fuente, P. A. Tanguy 11:30—946. In situ rheological monitoring of semibatch emulsification for cosmetic cream production. L. Choplin, S. Torandell, J. Servoin, G. Pagniez 12:00—947. Influence of elongational flow characteristics in continuous rotor-stator dispersing processes for complex food systems. E. Windhab Hotel El Camino Real Camino Real II Symposium on Advances in the Chemistry of Asphaltenes and Related Substances (635) Theoretical and Experimental Structural Studies

I. Kowalewski, J. Murgich, Presiding 9:00—948. Computer modeling of micelles of an Athabasca asphaltene and some resins. J. Murgich, J. Abanero, O. Strausz 9:30—949. Asphaltene stacking and aggregation: Models and scattering data. M. A. J. Michels, H. C. A. Brandt, R. Haswell, A. J. Markvoort 10:00—950. Computerized studies of asphaltene structures. M. S. Lin, E. T. Premuzic, C. Liu 10:30—Intermission. 10:45—951. Molecular modeling of various geochemical types of asphaltenes. I. Kowalewski, M. Vandenbroucke, F. Behar, S. Kressmann, F. Morel, O. Strausz 11:15—952. Structure and reactivity of petroleum-derived asphaltene. M. Nomura, Y. Miyatani, Y. Su, W. Trisunaryanti, K. Kaneda, M. Miura 11:45—953. Asphaltene and wax deposition envelope revisited. K. J. Leontaritis 12:10—954. Extraction of carboxylic acids from asphaltenes of Cerro Negro extraheavy crude oil, and their molecular interfacial characterization. G. Escobar, S. Acevedo, M. Ranaudo, J. Khazen, M. Garcia

Area 07—Environment Centro de Convenciones Tulum 2 Symposium on Atmospheric Chemistry: From Local to Global Pollution (608)

M. J. Molina, L. T. Molina, Organizers M. J. Molina, Presiding 9:00—Introductory Remarks. 9:10—955. Freezing of type 1 polar stratospheric clouds. J. J. Sloan, A. K. Bertram 9:35—956. Halide oxidation in the sea salt aerosol. M. Mozurkewich, J-M. Regimbai, C. Anastasio 10:00—957. Interactions of particles and gases with solar radiation in Mexico City. G. B. Raga, A. C. Raga, L. G. RuizSuârez, D. Baumgardner 10:25—958. Formation and properties of secondary atmospheric aerosols. S. N. Pandis

10:50—959. Halogen atoms in the troposphere: Indirect estimates based on changes in patterns of nonmethane hydrocarbons. J. Rudolph 11:10—Intermission. 11:35—960. Organic carbon in Mexico City aerosols. L. G. Rui'z-Suârez, O. AmadorMunoz, G. L. Andraca-Ayala, R. VillalobosPietrini 12:00—961. Formation of hydroxycarbonyls from anthropogenic and biogenic VOCs. R. Atkinson, J. Arey, E. S. C. Kwok, E. C. Tuazon, S. M. Aschmann, A. Alvarado

Area 08—Macromolecular Hotel El Camino Real Camino Real I Symposium on Polymer Reactions (576) G. Burillo, A. Singh, W. H. Daly, Organizers W. H. Daly, Presiding 9:00—Introductory Remarks. 9:05—962. Zwitterionic cyclopolymers: A new class of polyampholytes containing sulfobetaine and carboxybetaine moieties. R. S. Armentrout, Y. Hu, M. F. Richardson, C. L. McCormick 9:35—963. Chemical transformations of hydroxy and amino polyimides. D. LiKhatchev, L. Alexandrova, R. Vera 10:05—964. Regenerable polymeric reagents bearing triphenylphosphine dichloride and diisopropylphenylphosphine dichloride groups. A. Licea-Claverie, I. A. Rivera, B. L. Garcia, M. S. Morales, M. G. Moreno 10:25—965. Oxidative doping and synthesis of self-doped poly-3-(undecanyl-2,2'-bithiophene). C. D. Edmond, L. M. Tolbert, J. Kowalik 10:45—966. Measurement of cellulase kinetics and initial product formation. D. B. Johnston, J. R. Whitaker, S. P. Shoemaker, G. M. Smith 11:05—967. Intermediary 4-[2-hydroxy-1phenyl)ethyl]-pyridine from 4-styrylpyridine and benzaldehyde reaction. J. Percino, V. M. Chapela 11:25—968. Polymerization of o- and p-methacryloylamlnophenylarsenic acids. T. Zayas, J. Percino, V. M. Chapela, J. Cardoso Fiesta Americana Coral Beach Grand Coral II Symposium on Nanostructured Materials (605)

M. J. Yacaman, K. Gonsalves, Presiding 9:00—969. Molecular metal nanocrystals and their arrays. R. L. Whetten 9:40—970. Chemically prepared nanostructures: Atomic scale structure and properties. M. Benaissa 10:10—971. Use of fullerenes for grain-size and phase stabilization of nanostructured materials. E. Barrera, X. Sheng, B. Mayeaux, L. Zheng, S. Wang, K. Lozano, V. Provenzano 10:40—Intermission. 11:00—972. Semiempirical study of silicongermanium mixed clusters: Size- and composition-dependent properties. J. Robles, J. Gomez 11:30—973. Chemical synthesis of nanostructured materials. K. Gonsalves, J. G. Carlson 12:00—974. Complexes of polyelectrolyte gels with surfactants as nanostructured environment for metal nanoparticles formation. L. M. Bronstein, O. A. Platonova, P. M. Valetsky, A. T. Dembo, E. E. Makhaeva, A. R. Khokhlov Fiesta Americana Coral Beach Grand Coral I Symposium on Liquid-Crystalline Polymers (633)

D. Gui I Ion, Presiding 9:00—975. Structural properties and molecular dynamics of ferroelectric liquid-crystalline polymers and elastomers. F. Kremer, H. Brodowsky, W. Lehmann, H. Skupin, L Hartmann, S. Shilov 9:30—976. Main-chain ferroelectric liquid-crystalline polymers. P. Keller, D. M. Walba, R. Shao

10:00—977. Solid opalescent films originating from semi-IPNs of helical polymers. R. Zentel, M. Miiller, G. Maxein, E. Szych 10:30—978. Simultaneous organization on different molecular length scales in liquidcrystalline polymers. C. K. Ober 11:00—979. Organosiloxane liquid crystals: From virtual polymers to optoelectronic reality. H. Coles 11:30—980. Effects of low polymer content in liquid-crystal displays. L. C. Chien

Area 09—Special Topics in Organic Chemistry Centra de Convenciones Cozumel 3 Symposium on Supramolecular Structures: Characterization and Physical Aspects (523)

L. Rodriguez-Hahn, Presiding 9:00—981. Construction and properties of open supramolecular networks. J. D. Wuest 9:45—982. Supramolecular catalysis and sensing. E. V. Anslyn, A. Metzger, D. Kneeland, K. Worm 10:30—Intermission. 10:50—983. Molecular encapsulation. J. C. Sherman 11:35—984. Modular approach to supramolecular structures: Covalent vs. noncovalent synthesis. D. N. Reinhoudt Centro de Convenciones Cancun 5 Symposium on Natural Products of Biological Interest (553)

L. Quijano, A. D. Kinghorn, Presiding 8:55—Introductory Remarks. 9:00—985. From natural products to bioactive substances. A. San Feliciano, J. L. LopezPérez, M. Gordaliza 9:40—986. Discovery and development of natural insecticides from higher plants. M. B. Isman 10:20—987. Bioactive natural products of medicinal and agrochemical interest from selected Mexican plants. R. Mata 11:00—Intermission. 11:15—988. Ecology-based strategies for the discovery of new bioactive natural products from fungi. J. B. Gloer 11:55—989. Metabolic engineering: Problems and prospects in increasing plant secondary metabolite production. R. Verpoorte Centro de Convenciones Cancun 4 Symposium on Organometallic Transformations in Synthesis (555)

L. S. Liebeskind, N. A. Petasis, H. Alper, C. Alvarez-Toledano, E. Pena-Cabrera, Organizers N. A. Petasis, Presiding 9:00—990. Titanium carbenes in organic synthesis. N. A. Petasis 9:40—991. Recent applications of alkene metathesis in natural product chemistry. A. G. M. Barrett, S. P. D. Baugh, D. C. Braddock, K. Flack, V. C. Gibson, P. A. Procopiou 10:20—992. Transition-metal-catalyzed biomimetic oxidation reactions. S. Murahashi 11:00—993. Organometallic chemistry of iron complex with unsaturated ligands. C. Alvarez-Toledano, R. A. Toscano, O. GarciaMellado 11:40—994. Regio-, stereo-, and enantioselective organic synthesis via transition-metal carbonyl complexes. H-J. Knôlker, A. Braier, W. Frohner, H. Hermann, C. Hofmann, G. Schlechtingen, G. Weingàrtner Centro de Convenciones Tulum 3 & 4 Symposuim on Theoretically Interesting Molecules (628)

G. J. Bod well, Presiding 9:00—995. Cubene and cubane-diyl: Versatile building blocks. P. Eaton 9:30—996. Vinyl aliène oxides: An ab initio study of their thermal rearrangements to 2-cyclopenten-1-one. B. A. Hess Jr., L. Smentek

10:00—997. Topological stereoisomers. J. S. Siegel 10:30—998. Synthesis of substituted phthalocyanines. C. C. Leznoff 11:00—999. Dehydrobenzoannulenes revisited: A new look at an old molecular system. M. L. Bell, S. C. Brand, C. A. Johnson, J. J. Pak, M. M. Haley 11:30—1000. Double Diels-Alder macroannulation of bisdienes by bisdienophiles: Synthesis of macrocyclic belt-shaped cyclophanes as precursors to cyclacenes and related molecular hoops. R. M. Cory, A. J. Dikmans, C. L. McPhail, D. Carrozzella, C. J. Scott 12:00—1001. Annelated semibullvalenes: Ground-state neutral homoaromatics? R. V. Williams 12:25—Concluding Remarks. Centro de Convenciones Cozumel 4 Symposium on Origins of Organic Matter in the Early Earth: Endogenous vs. Exogenous Sources (629)

F. Raulin, Presiding 9:00—Introductory Remarks. 9:05—1002. Biological molecules in very hot environments. V. A. Basiuk, R. NavarroGonzâlez 9:35—1003. Hydrogen cyanide polymers: Endogeneous/exogeneous sources of prebiotic polypeptides and nitrogen heterocycles. C. N. Matthews 10:05—Intermission.

K. Kobayashi, Presiding 10:30—1004. Role of methane in the origin of life and in paleoclimates of Earth and Mars. J. F. Kasting, L. L. Brown 11:00—1005. Chemical syntheses by volcanic lightning. R. Navarro-Gonzâlez, V. A. Basiuk 11:30—1006. Reduction of carbon dioxide to organic compounds underneath the ocean floor. N. G. Holm

Area 10—Special Topics in Inorganic Chemistry Centra de Convenciones Tulum 1 Symposium on Organometallic Chemistry of Group 3 and the f-Elements (513) C. J. Burns, Presiding 9:00—1007. Synthesis and reactivity of lanthanide metals in new coordination environments. W. J. Evans 9:30—1008. Recent developments in lanthanide chemistry using phosphide ligands. G. W. Rabe, G. P. A. Yap, L. M. LiableSands, I. A. Guzei, A. L. Rheingold 10:00—1009. Utility of uranium complexes in organic synthesis. M. Ephritikhine, R. Adams, O. Maury, C. Villiers 10:30—Intermission. 10:50—1010. Ligand design for the early metals and the lanthanides. M. D. Fryzuk, J. B. Love, S. J. Rettig 11:20—1011. Approaches to computer-aided design of f-element complexes. M. T. Benson, T. R. Cundari, E. W. Moody, L. C. Saunders, S. O. Sommerer 11:50—1012. Chiral donor-stabilized organolanthanide complexes. H. Schumann, F. Erbstein, M. Glanz, D. Karasiak, E. C. E. Rosenthal 12:20—Concluding Remarks. Centro de Convenciones Xcaret 3 & 4 Symposium on Organometallic Catalysis (583) M. J. Rosales-Hoz, Presiding 9:00—Introductory Remarks. 9:05—1013. Palladium- and nickel-catalyzed formation of aryl amines, aryl ethers, and a-aryl ketones: Fundamentals and applications. J. Hartwig 9:45—1014. Polymerization of olefins using late-transition-metal complexes. M. Brookhart, L. K. Johnson, C. M. Killian, D. J. Tempel

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10:25—1015. Catalytic synthesis of sulfur-containing macrocycles from thietanes and thiiranes by metal carbonyl complexes. R. D. Adams, W. Huang, J. Long, J. Perrin, J. H. Yamamoto 11:05—1016. Thiaplatinacycles derived from thiophenes. J. Garcia 11:45—1017. Models for bimetallic catalysts. R. J. Puddephatt 12:25—Concluding Remarks.

Area 11-Special Topics in Physical Chemistry Hotel El Camino Real Del Sol Symposium on Crystal Engineering: Functional Solids by Design (516) Applications and Properties

R. D. Rogers, M. J. Zaworotko, Organizers R. D. Rogers, Presiding 9:00—1018. Control of the bulk magnetic properties of manganoporphyrin-based magnets via crystal engineering. J. S. Miller, A. J. Epstein 9:30—1019. Gas/solid reactivity of molecular solids. M. Olivân, A. Marchenko, J. Coalter, K. G. Caulton 10:00—1020. Synthesis, properties, and applications of hybrid organic-inorganic compounds. V. M. Castano 10:30—1021. Noncovalent derivatization: Environmentally benign synthesis via self-assembly. J. C. Warner 11:00—Intermission. 11:10—1022. Disappearing polymorphs. J. Bernstein, J. O. Henck 11:40—1023. Rational design of multicomponent calix[4]arene-based supermolecules and control of their solid-state structure. L. R. MacGillivray, J. L. Atwood, L. J. Barbour 12:10—1024. Engineering crystals for the construction of macroscopic devices. A. W. Coleman, P. Goreloff, R. Lamartine, F. Lequever, J. Mugnier, M. Gamoudi 12:40—Concluding Remarks. Hotel Krystal Krystal I Symposium on Stochastic Processes in Chemistry (527)

K. Lindenberg, Presiding 9:00—1025. Observations of pattern formation in reaction-diffusion systems. H. L. Swinney 9:35—1026. Nonclassical kinetics in tubular spaces: Theory, simulations, and experiments. R. Kopelman, A. Lin, E. Monson, M. Feldman, P. Argyrakis 10:10—1027. Diffusion equations and pattern formation in confined systems. C. Varea 10:45—1028. Determinism vs. stochasticity in diffusive growth. H. Levine 11:20—1029. Pattern formation in surface chemical reactions. L. M. Sander 11:55—1030. Coarsening processes in reactive sytems. S. Redner, E. Ben-Nairn, P. Krapivsky, F. Leyvraz Fiesta Americana Coral Beach Coral Sea I Symposium on Laser Control of Electrons and Molecules (532)

R. Lefebvre, Presiding 8:30—1031. Stirap-based active control of product formation in a reaction. S. A. Rice 9:10—1032. Laser phase control of vibrational excitations and electron ionization. A. D. Bandrauk, S. Chelkowski, H. Yu 9:40—1033. Long wavelength limit of fieldinduced dynamics. L F. DiMauro, B. Sheehy 10:10—Intermission. 10:30—1034. Two-color phase control of the electron and proton emission directions in strong field, multiphoton excitation of H 2 + . K. C. Kulander, F. H. Mies

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11:00—1035. Wavepacket control of the dissociative ionization of H 2 in an IR laser field. T. T. Nguyen-Dang, F. Châteauneuf 11:30—1036. Strong field control of photochemistry. Y. Chen 12:00—1037. Molecular optics. P. B. Corkum, C. Ellert, C. Milne, H. Stapelfeldt, H. Sakai

THURSDAY AFTERNOON Session 2 Poster Program

Hotel Krystal Krystal II Symposium on Surface and Interface Phenomena (597)

3:30-5:30 PM

L. Blum, Presiding

1056. Preliminary toxicological studies of three derivatives of the herbicide Dicamba on mice. (Sp) K. Aoki, A. Romero, G. James, C. Juarez, G. Pieza, J. Haro 1057. Effect of Dicamba and three derivatives on tomato biomass production. (Sp) A. Romero, G. James, C. Juarez, G. Pieza, B. Miramontes, J. Haro 1058. Monodentate coordination vs. chelate formation in metallic adducts of phytopharmaceutical interest. (Sp) A. Lopez-Sandoval, Y. Quintero-Romano, C. Suârez-Ruiz, N. Barba-Behrens, M. Brito, F. J. MartinezMartinez, I. I. Padilla-Martinez 1059. Microstructure of cheese analogs as influenced by fat type. (Sp) C. Lobato Calleros, J. E. Vernon Carter, I. Guerrero Legarreta 1060. Use of fat blends in cheese analogs: Influence on the sensory and instrumental characteristics. (Sp) C. Lobato Calleros, E. J. Vernon Carter, I. Guerrero Legarreta, E. Aguirre Mandujano

9:00—1038. Shapes and textures of domains in Langmuir monolayers. C. M. Knobler 9:45—1039. Phase diagrams of Langmuir monolayers of a family of long-chain esters. J. Ruiz-Garcia, D. Valdez-Pérez 10:20—1040. Textures and phase transitions in monolayers of fatty acids. R. Castillo, S. Ramos, J. Ruiz-Garcia 10:55—Intermission. 11:00—1041. Structure and properties of metal-aqueous electrolyte solution interfaces. G. Patey, D. R. Berard, M. Kinoshita, J. Shelley 11:35—1042. Simulation of adsorption on stepped surfaces. W. Steele, M. J. Bojan 12:10—1043. The puzzling physics of liquid water and amorphous ice. H. E. Stanley, S. T. Harrington, O. Mishima, P. H. Poole, F. Sciortino Fiesta Americana Coral Beach Coral Island I Symposium on Surface-Enhanced Raman Spectroscopy: Twentieth Anniversary Symposium (616)

R. Aroca, Presiding 9:00—1044. Raman scattering from adsorbates on facets and vicinal faces of copper. A. Otto, A. Bruckbauer, C. Siemes, J. Grewe 9:30—1045. Surface-enhanced Raman spectroscopy: Application to the study of molecules of biological and environmental interest. J. V. Garcia-Ramos, S. Sânchéz-Cortes, J. A. Sanchez-Gil 10:00—1046. On the mechanism of chemical enhancement in surface-enhanced Raman scattering. A. Campion, P. Kambhampati, C. M. Child, M. C. Foster, J. E. Ivanecky III 10:30—Intermission. 10:50—1047. Photochemical decomposition of quinoxaline adsorbed on silver colloid surface. J. S. Suh, N. H. Jang, D. H. Jeong, M. Moskovits 11:20—1048. Applications of surface-enhanced Raman spectroscopy to gas-phase heterogeneous catalysis on transition metals. M. J. Weaver, C. T. Williams, H. Y. H. Chan, S. Zou, C. G. Takoudis 11:50—1049. Surface-enhanced Raman scattering study on the photopolymerization process of a polydiacetylene derivative in Langmuir-Blodgett films. K. Itoh, Y. Urai, E. Shirai Hotel Krystal Krystal III Symposium on Relativistic Effects in Quantum Chemistry (624)

M. C. Zerner, Presiding 9:00—1050. Importance of relativity for periodic trends within a transition-metal triad: A DFT study on spectroscopy, thermochemistry, and kinetics. T. Ziegler 9:35—1051. Exact incorporation of negativeenergy orbitals in relativistic configuration interaction. C. F. Bunge, R. Jauregui, E. Ley-Koo 10:10—1052. Cost-effective relativistic allelectron methods. K. Dyall 10:45—Intermission. 11:05—1053. Effects of relativity and correlation upon scattering factors and Compton profiles. V. Smith 11:40—1054. Relativistic density-functional studies on heavy transition-metal clusters and complexes. N. Rôsch 12:15—1055. The notion of optimal decoupling of positive-energy and negative-energy orbitals in relativistic electronic structure calculations beyond Hartree-Fock. R. Jauregui, C. Bunge

Centro de Convenciones Bacalar 1 Agrochemistry: General

Biochemical/Medicinal/Pharmaceutical: General 1061. Automated design of site-directed combinatorial libraries using partially fixed docking. D. Bouzida 1062. Enantio- and regioselective preparation of chiral monomer by lipase-catalyzed kinetic resolution. X. Zhang, R. J. Kazlauskas 1063. Synthesis of 1,2,3,4-tetrahydroisoquinolines containing electron-withdrawing groups. E. Vazquez, G. J. Quallich, T. M. Makowski, A. F. Sanders, F. J. Urban 1064. Structural definition of the C5a C-terminus: A deuterium exchange study. X Zhang, W. Boyar, M. Toth, L. Wennogle, N. C. Gonnella 1065. Derivatives of benzene carboxylic acids as inhibitors of Ras protein farnesyl transferase. D. M. Stout, D. L. Arendsen, S-C. Ng, J. Cohen, B. Saeed, H. Zhang, H. Stein, S. H. Rosenberg 1066. Novel bisintercalating anthracyclines. W. Priebe, J. B. Chaires, T. Przewloka, I. Fokt, Y-H. Ling, A. H-J. Wang, G. Grynkiewicz, R. Perez-Soler 1067. Descriptive mathematical model of the biochemical processes of habituation in PC-12 cells. S. Barrientos, A. Obaya, G. Flores, V. Tchijov 1068. Lactones and lactone adducts of NSAID derivatives with increased growth inhibitory activity. G. J. Sperl, R. Pamukcu, G. Piazza, D. S. Alberts, K. Brendel, P. H. Gross 1069. EPR studies of the erythrocyte membrane of hypertensive rats. A. Pezeshk, D. Dalhouse 1070. Differential diagnosis of invasive amebiasis by Western blot. (Sp) M. S. FloresCastaneda, G. L. Mena, F. Castaneda, S. Said-Fernandez 1071. Isolation by isoelectrofocusing of an Entamoeba histolytica immunodominant protein. (Sp) R. Rangel, E. Tamez, R. Tijerina, A. Isibasi, M. S. Flores-Castaneda 1072. Modulation of G-protein expression by nitric oxide synthase inhibition: Relationship with adenylyl cyclase. M. B. AnandSrivastava, F. DiFusco 1073. Initiatives in drug design and synthesis to modulate signal transduction. D. J. Witter, A. L. Castelhano 1074. Pharmaceutical biochemical applications of tris buffer. A. Eachus, C. Treu 1075. Androgenic and anabolic effect on ornamental fish induced by trenbolone acetate. (Sp) H. Salgado, A. Azpeitia, V. Demesa, S. Maranon

1076. Hypoglycemic effect of triterpenoids of Bouvardia terniflora. R. M. Pérez G., C. Pérez G., M. A. Zavala S., S. Pérez G., R. Vargas S. 1077. Geometry control of the formation of promazines. P. Lugo-Mas, C. Garcia, L. E. Pinero, S. Amaro, A. Morales 1078. Geometry control of Smiles phenothiazine synthesis. J. Garcia, C. Garcia, L. E. Pinero 1079. Mandelate racemase from Pseudomonas putida: Activity studies in organic solvents. U. Felfer, M. Boy, H. Voss, K. Faber 1080. Initiatives in drug design and synthesis to modulate signal transduction. D. J. Witter, A. L. Castelhano 1081. Structural basis for construction of mimetics of an anti-HIV proteinase /V-terminus reactive antibody. J. Brynda, R. Stouracova, J. Lescar, M. Fabry, M. Horejsi, V. Chitarra, M-M. Riottot, J. Sedlacek, G. A. Bentley 1082. Peptide mimetics of an anti-HIV proteinase flap-reactive monoclonal antibody. R. Stouracova, J. Brynda, J. Lescar, M. Fabry, M. Horejsi, V. Chitarra, M-M. Riottot, J. Sedlacek, G. A. Bentley 1083. Myoglobin- and hemoglobin-catalyzed monooxygenase and oxidase reactions. W. H. Fuchsman Computer/Information: General 1084. Software for polymer education/training. J-M. Charrier, B. Sanschagrin 1085. NMR and X-ray diffraction study of intramolecular hydrogen bonding in oxamide derivatives. (Sp) J. B. Saavedra-Ramirez, R. C. Rojas-Damiân, E. Geniz-Dominguez, M. A. Brito, I. I. Padilla-Martinez, F. J. Martinez-Martinez 1086. QSAR of the antihypertensive activity of tryptophan analogs, using neural networks. (Sp) M. L. Velazquez Μ., Μ. A. Ordorica V., J. G. Ordorica V., P. A. Lehmann F. 1087. Superimposition with the serotonin pharmacophore makes it possible to get descriptors for QSAR analysis. (Sp) J. G. Ordorica V., M. A. Ordorica V., M. L. Velazquez M., P. A. Lehmann F. 1088. Ab initio molecular dynamics study of proton transfer in malonaldehyde. K. Wolf, W. Mikenda, E. Nusterer, K. Schwarz 1089. Molecular interactions in a DNA-daunomycin complex. L. Chacon-Garcia, J. A. Cogordan, R. Martinez Centro de Convenciones Bacalar 2 Symposium on Crystal Engineering: Functional Solids by Design (516) 1090. 1-D polymers and 2-D grids formed by lanthanide-ethanediphosphonic acid complexation. L. M. Rogers, C. V. K. Sharma, R. D. Rogers 1091. Design of 2-D networks in cadmium halide complexes. R. P. Swatloski, C. V. K. Sharma, R. D. Rogers 1092. 1-D and 2-D open framework coordi­ nation polymers. C. Seward, M. J. Zawo­ rotko, N. White, K. Biradha 1093. Organometallic anion hosts. K. T. Holman, J. L. Atwood Symposium on Stochastic Processes in Chemistry (527) 1094. Stochastic study of the Lorenz system. K. M. Garcia-Ruiz, R. Peralta-Fabi, V. M. Romero-Rochin 1095. Correlated-bond percolation model for polymerization. R. Hernandez, M. Vogt 1096. Maximum entropy principle and the stochastic aspects of the deterministic chaos. J. L. del Rio-Correa, L. S. GarciaColin Inorganic Chemistry: General 1097. Direct chemical and electrochemical syntheses of copper dimethyldithiocarbamate: Influence of ultrasound. (Sp) L. M. Blanco Jerez, B. I. Kharisov, A. D. Garnovskii, M. Salinas 1098. Nickel peptide complexes containing thiolate or thioether coordination through amino acid side chains. J. D. Van Horn, C. J. Burrows

1099. New diorganotin heterocycles derived from 2-substituted 2-amino-benzimidazole and benzothiazole ligands. N. AndradeLopez, M. P. Fialon, M. Gayosso, A. Cruz, R. Contreras 1100. Synthesis and reactivity study of α and γ hydroxyacids and hydroxyamides with boron reagents. A. Vâsquez-Badillo, R. Salas-Coronado, A. Flores-Parra 1101. Synthesis and reactivity of chiral C-2 substituted dithiazines. V. M. GonzalezDiaz, C. Guadarrama-Pérez, A. FloresParra 1102. New lithium complexes of β-chloro and β-hydroxysulfonamides. R. Salas-Corona­ do, A. Flores-Parra 1103. Reaction of n-alkyl-1,3,5-thiadiazine and n-alkyl-1,3,5-dioxazine with BF3-OEt2 and BCI3. S. A. Sanchez-Ruiz, A. FloresParra 1104. Metal complexes of telluroamides and selenoamides. G. M. Li, R. A. Zingaro 1105. Coordination compounds of 5-benzimidazolecarboxylic acid. (Sp) A. Rosas-Zavala, N. Barba-Behrens, S. Castillo-Blum 1106. [2-(/v,/V-Dimethylaminoethyl)cylopentadienyl]-ligand in bimetallic M/E complexes (M = Fe, Ni, Pt; Ε = AI, Ga, In). H. Hoff­ mann, R. A. Fischer, S. Nlate, E. Herdtweck, L Zsolnai 1107. Inhibition of mitochondrial calcium-ion transport by a ruthenium red analog. A. Garza-Ortiz, M. E. Sosa-Torres, E. Cha­ vez, C. Zazueta 1108. Evaluation of the reactivity of ligands Xn~ in the synthesis of compounds of the type [Fe(Picdien)Xn+. L. A. Ortiz-Frade, V. M. Ugalde-Saldivar, M. E. Sosa-Torres, I. Gonzalez 1109. Magnetic study of new compounds formed with pentadentate ligands and iron. M. Méndez-Ortiz, M. E. Sosa-Torres, R. Escudero, R. W. Gomez 1110. Formation of a diketo diiron compound. L. O. Spreer, S. Krenn, S. Gong, C. Lange, J. W. Otvos, M. Calvin, H. Hope 1111. Exchange reactions of thiaplatinacycles with thiophenes. A. Arévalo, S. Bernés, J. Garcia, F. Del Rio, B. Quiroz, P. Maitlis 1112. Synthesis and crystal structures of main-group and transition-metal triazenides. P. J. Walsh, P. Gantzel, S. Baker 1113. Synthesis, single X-ray structure, 1 H NMR spectroscopy, and electrochemistry of the frans-dichloro(TTP)rhodium(lll) chloride, dihydrate(TTP = 1,4,8,11-tetratiocyclotetradecane). C. Pérez-Casas, V. M. Ugalde-Saldivar, M. E. Sosa-Torres, I. Gonzalez, R. A. Toscano 1114. Synthesis and X-ray characterization of 1-[M-dithio-bis-(tricarbonyl)]-2-(p-fî-benzoyl)ethane complexes (2a, 2b, 2c, and 2d). C. Alvarez, J. Enriquez, R. A. Toscano, E. Cortes, O. Garcia 1115. Infrared and Raman spectra (solidstate) of diamminediiodidecadmium(ll) complex with 15N and 2 H isotopic substitution. (Sp) C. A. Téllez S., D. N. Ishikawa 1116. Coordinant capacity of the heterocycles 1-ox-4,6-dithia-5-stibocane, and 1,3,6 trithia-2-stibocane toward sulfur electrondonating ligands. (Sp) E. M. Lopez, P. E. Garcia, A. Millân, M. A. Campos, R. Cea 1117. Direct electrosynthesis of metal (Cu, Cd, and Zn) coordination compounds of oxicams in nonaqueous medium. (Sp) M. A. Méndez-Rojas, G. Gojon, M. A. Quiroz, E. Gonzalez 1118. Silver complexes derived from naphtholligands. (Sp) J. G. Robles-Martinez, A. Salméron-Valverde, J. Arguelles-Ramirez 1119. Synthesis and study of the coordination behavior of iminodiace-toamidas. M. Robles-Romero, A. R. Tapia-Benavides 1120. Variation of the degree of charge transfer in TTF molecular complexes with nitrocarboxylated fluorene derivatives. (Sp) A. Salmeron-Valverde, J. G. Robles-Martinez, J. Garcia-Serrano, R. Gomez, R. M. Ridaura, M. Quintana 1121. Crystal structure of tetrachlorocuprate(ll) salts of aminoguanidones. J. Valdés-Martinez, D. X. West, J. AlstrumAcevedo, R. A. Toscano, S. HernandezOrtega, G. Espinosa-Pérez

1122. Electrical and magnetic properties of the Nd186Ce0.i4CuO4 system under several reductive media. J. Feuchtwanger, G. Tavizon 1123. Crystalline structure refinement in the synthesis of materials. A. Garcia-Ruiz. X. Bokhimi, A. Morales 1124. Colored-glass preparation at low temperature without silica. (Sp) M. Meijueiro M., M. Chavez M. 1125. Tetragonal nanophase stabilization in sol-gel zirconia. X Bokhimi, A. Morales, O. Novaro, T. Lopez, F. Tzompantzi, R. Gomez, M. Portilla 1126. Fluorination of Pr 2 Cu0 4 and its physical properties. F. Romero, G. Tavizon, J. P. Bernai, J. O. Flores, J. M. Saniger 1127. Electrical and magnetic properties of the (Ca, Sr^RExCuOp+ô system: RE = Nd, Gd, and Dy. G. Tavizon, R. Escudero 1128. Two new condensation complexes of salicylaldoxime and dimethyltin(IV) oxide. M. Gielen, R. Willem, C. Camacho Camacho, A. Bouhdid, M. Biesemans, E. R. T. Tiekink 1129. Κ and Na adsorption in shale. (Sp) R. Monsalvo, L. G. de Pablo, M. L. G. Cha­ vez, C. Avilés, M. G. P. Miranda 1130. Stability of shale in Ca and Mg solutions. (Sp) M. G. P. Miranda, L. G. de Pablo, M. L. G. Châvez, C. Avilés, R. V. Monsalvo Physical Chemistry: General 1131. Surface tension of mixtures of acetonitrile and water close to the UCST. L. M. Trejo, J. Garcia 1132. Transient foaminess, surface activity, and incompatibility in nonaqueous binary systems. L. M. Trejo, B. Kronberg 1133. Thermodynamic efficiency and the fundamental equation. A. Valderrama-Cano 1134. Corrosion of titanium heat-transfer equipment in the process to obtain cathodic copper. (Sp) R. C. Vâsquez 1135. Theoretical study of small rhodium clusters by means of DFT. A. G. Zacarias, J. Seminario, M. Castro Centra de Convenciones Bacalar 3 Organic Chemistry: General 1136. Synthesis of new heterocycles from 2-aminobenzothiazole and carbon disulfide. A. Cruz, M. Gayosso, H. Tlahuext, R. Contreras 1137. Synthesis and 13C NMR studies of furoindolic enamine derivatives. O. R. Suârez-Castillo, M. S. Morales-Rios, P. Joseph Nathan 1138. Molecular rearrangements on the sixmembered ring of longipinenes. C. A. Flores-Sandoval, C. M. Cerda-Garcia-Rojas, P. Joseph-Nathan 1139. Photochemical reactivity of longipinene derivatives. M. Meléndez-Rodriguez, C. M. Cerda-Garcia-Rojas, C. A. N. Catalan, P. Joseph-Nathan 1140. Longipinene derivatives from Stevia lucida. D. Guerra-Ramirez, C. M. CerdaGarcia-Rojas, A. M. Puentes, P. JosephNathan 1141. Controlling the stereochemistry 3 and 4 carbons distant from a nitrogen using the charge-accelerated [1,3] sigmatropic rearrangement of 3-alkylamino-4-phenylthio-1,5-hexadienes. D. Macdonald, C. Stephenson, H. Perrier 1142. Selective chemical transformations on the echinocandin class of antifungal agents. M. J. Rodriguez, M. J. Zweifel, P. S. Borromeo, J. A. Jamison, L. L. Zornes, R. E. Stratford, V. Vasudevan, W. W. Turner 1143. Lewis-acid-catalyzed exocyclic acyl imine cyclizations. M. P. DeNinno, C. Eller 1144. Synthetic approach to Herbindole A utilizing the Diels-Alder reaction of a 3-vinyl-1-(phenylsulfonyl)pyrrole. D. M. Ketcha, S. J. Glass 1145. Lithiation of sydnones. K. Turnbull, D. M. Krein 1146. Tandem vs. bis-(2-substituted)ethynl coupling in the synthesis of conjugated diyne-ene-[3]cumulenes. J. Gabriel Garcia, B. Asfaw 1147. Synthesis of oxygenated benzo[c]pyrans. C. B. de Koning, J. P. Michael, J. R. Oliveira

1148.1,3-Dimethyl-l ,2,3,4-tetrahydroisoquinolines and 1,3-dimethylbenzo[c]pyrans: Precursors to the michellamines and their oxygen analogs. C. B. de Koning, J. P. Michael, W. A. van Otterlo 1149. Novel synthesis of substituted phenanthrenes. C. B. de Koning, A. L. Rousseau, J. P. Michael 1150. (1-4)-3-Deoxyselenodisaccharides from levoglucosenone. Z. J. Witczak, R. Chhabra, H. Chen 1151. Biocatalytic approach to the synthesis of epibatidine. H. F. Olivo, M. S. Hemenway, M. H. Gezginci 1152. Unsymmetrically acylated enterobactins and analogs. E. L. Bolanos, J. Y. Nagasawa, R. B. Amador, R. J. A. Ramirez, C. G. Gutierrez 1153. Electrochemical synthesis of azo compounds. Ν. Ε. Gascon, M. A. Dosai 1154. Synthesis of novel aromatic porphyrinoids by the "3 + 1" approach. T. D. Lash, M. J. Hayes, S. T. Chaney, J. C. Petryka, D. T. Richter Centra de Convenciones Bacalar 4 Symposium on Natural Polymers as Advanced Materials (626) 1155. Use of edible coatings to extend postharvest life of fresh fruits. R. Baez-Sanudo, E. Bringas-Taddei, J. Ojeda Con­ treras, G. Gonzâlez-Aguilar, A. M. Mendoza-Wilson 1156. Study on the property-structure relationship for cross-linked styrene-acrylic copolymers. W. Manzano, M. A. Cruz, W. Ramirez. M. Aguilar 1157. Effect of foaming agents' composition on the drying kinetics of tamarind foammat. H. Romero-Tehuitzil, E. J. VernonCarter, M. G. Vizcarra-Mendoza 1158. Thermochemical processes for derivatization of natural polymers. R. E. Wing, J. L. Willett 1159.Studiesonpoly(hydroxyalkanoates)-ethylcellulose blends. H. Raval 1160. Controlled release of pentachlorophenol from various biodegradable polymer matrix systems. H. Raval 1161. Keratin films from wool. A. E. Pavlath, C. Houssard, W. Camirand, G. H. Robertson 1162. Mechanical behavior of lignocellulosic fillers-PE materials. A. Camara, M. Garcia Ramirez, J-Y. Cavaillé, N. Bahlouli 1163. HPLC studies of exopolysaccharide biopolymer from Rhizobium loti. G. A. N. Soto, T. J. Keller, R. R. Castro, L. E. Rios, R. S. Reginensi, E. Angeles 1164. Investigation of amphipathic biopolymers for the stabilization of hydrophobic interfaces in aqueous systems. J. Kahalley.'M. F. Richardson, G. G. Martin, G. C. Cannon, C. L. McCormick 1165. Biodegradable coatings for polysaccharide-based materials. R. Shogren, L. Wang 1166. Immobilization of an enzyme-coupled system as reagent phase for a future bilirubin sensor. M. M. Vidal, M. H. Gil, I. Delgadillo, J. C. Alonso 1167. Cellulose derivative membranes as supports for immobilization of enzymes. R. Lagoa, D. Murtinho, M. Gil Computer/Information: General 1168. Electrostatic dissipating properties of poly(ethylene oxide) segmented polyamides and polyurethanes. J. J. Lin, M. Y. Young, Y. C. Chen, T. Y. Lin 1169. Soda-formaldehyde as pretreatment agents for Populus deltoïdes CMP pulps. J. Ramos, F. Dâvalos, J. Sandoval 1170. Fluorine-containing polyacrylates. J. B. Oba, J. W. Fitch, Ρ Ε. Cassidy 1171. Dispersion copolymerization of styrenedivinyl benzene in polar media. C. Soto, J. Revilla 1172. Dispersion copolymerization of vinylacetate/n-butyl acrylate in polar media. R. Rodriguez, J. Revilla 1173. Synthesis of nanocrystals in bicontinuous cubic phase. B. R. Ratna, J. P. Yang, E. F. Skelton, Q. B. Qadri

1174. Correlation between morphology and properties on zwitterionic polymers. R. Montiel, J. Cardoso, N. Batina 1175. Synthesis and conformation of optical­ ly active poly(aromatic isocyanatejs. K. Maeda, Y. Okamoto 1176. Synthesis of SBS block copolymers in the presence of triethyl-o-acetate and 1,2diethoxyethane used as structure modifi­ ers. R. C. Tsiang 1177. Mannich-Michael thermosets. N. M. Irving 1178. Kinetics and modeling of condensation polymers. W. H. Ray, F. W. Mallon, K. J. Beers 1179. Effect of crystallinity on optical appear­ ance in PET bottles. F. Mijangos-Santiago, R. M. Cruz-Hernândez 1180. Electrochemical supercapacitors based on conducting polymers. J. P. Ferraris, M. Eissa, D. C. Loveday, A. Moxey, C. J. Neef 1181. Synthesis and evaluation of naphthalene-HALS derivatives as ultraviolet stabilizer for polyolefins. (Sp) R. Acosta O., N. Allen, E. Romero S. 1182. Preparation and electroluminescence studies of poly(alkyl thiophene-3-carboxylates). M. Pomerantz, Y. Cheng, R. K. Kasim, R. L. Elsenbaumer 1183. Photolytic generation of an oquinodimethane derivative and its reactions with unsaturated polymers. M. F. Farona, G. K. Jordan 1184. Synthetic and architectural control of a lyotropic liquid-crystalline composite material containing PPV. R. C. Smith, D. L. Gin 1185. Hexagonally ordered, fluorescent, nanostructured materials via polymerizable thermotropic liquid crystals. B. P. Hoag, D. L. Gin 1186. Tuning nanocomposite architecture through transition-metal-containing lyotropic liquid-crystalline monomers. D. H. Gray, H. Deng, D. L. Gin 1187. Synthesis of highly ordered nanocomposites via polymerizable lyotropic liquid crystals. D. L. Gin, D. H. Gray, R. C. Smith, W. M. Fischer, H. Deng 1188. Micromechanical testing of weathered PETG sheets. S. M. Setz, R. S. Duran, D. R. Fagerburg Centra de Convenciones Cancun 2 Computer/Information: General 1189. Rotational constant of the interstellar species MgNc as predicted by quantum chemical methods. (Sp) A. Palma, N. Aquino, L. Sandoval 1190. Computation for complete group theory analysis of IR/Raman activity of normal modes of vibration. M. Scarlete, J. Seminario, N. Schmitt 1191. Theoretical study of the mechanism of the OH-propene reaction in an inert atmosphere. I. Diaz-Acosta, J. R. Alvarez-Idaboy, A. Vivier-Bunge 1192. Tabu search applied to the protein folding problem. R. Garduno-Juarez, L. B. Morales 1193. Semiempirical study of the Baeyer and Villiger rearrangement of p-substituted acetophenones with peformic acid. L. Reyes, R. Cardenas, R. Cetina, J. Lagunez-Otero 1194. Equilibria and analytic behavior of 2,4diamino-5-phenylthiazole in solution as modeled by calculated multiple minima hypersurfaces. (Sp) L. A. Montero-Cabrera, A. M. Esteva-Guas, J. Molina, A. Zapardiel, E. Bermejo, L. Hernandez 1195. Geographic digitized information in gas transportation/distribution projects. C. M. Doormann 1196. Density-functional study of neutral and charged copper and silver oxide systems. P. Calaminici, A. M. Koster, K. Jug 1197. Structural and molecular modeling studies of oligopeptide inhibitors of protein tyrosine phosphatases. N. R. Glover, A. S. Tracey 1198. New experience in teaching the information systems in Mexico. (Sp) M. I. Velazquez, J. Sierra, C. Halbinger 1199. Pigmalion: Improve design in chemical engineering applications. (Sp) R. Abrajan, F. Aguilar, R. Hernandez, A. Estrada, S. Gallegos 1200. Strategic partnering for knowledge management. S. P. Cristina

SEPTEMBER 15, 1997 C&EN 6 3

THURSDAY/TECHNICAL PROGRAM

1201. Comparison of ab initio HF/6-31G** calculatedvibrationalfrequenciesof/V-methyldihydrodithiazine with the gas-phase spectrum. L M. R. Martinez-Aguilera, M. Galvan, E. R. Alvarez, A. Flores-Parra 1202. Theoretical study of the reactivity of H2 in the presence of the CuPt catalyst. (Sp) A. Cruz, J. M. Martinez-Magadan, A. Cuan, S. Castillo 1203. Molecular embedded modeling of the strong metal support interaction (SMSI) for the Pd-Ti0 2 system. (Sp) A. Cuan, J. M. Martinez-Magadan, Y. Borodko, M. Castro 1204. "Order-disorder" phenomena in a dif­ fusion-reaction model of interacting dipoles on a surface: Exact numerical and analyti­ cal solutions. R. A. Garza-Lopez, L Naya, J. Angulo, R. Derby-Talbot 1205. Computers and information: Essential tools for the teaching of chemistry. A. Garcia-Luna, M. Garza-Obregon 1206. Molecular embedded modeling of the π-heptane reactivity within the supercell cage of a Y-zeolite. (Sp) J. M. MartinezMagadan, A. Cuan, A. Cruz, J. Capilla, M. Castro 1207. Rearrangement of 2,3-dihydro-1,2diazepin-40LS: Theoretical study. (Sp) J. G. Garcia, G. Ramirez, M. F. Rubio 1208. Computer simulation of the hydration in­ fluence on interactions, tautomerization, and coding properties of nucleic acid bases. (Sp) E. Gonzalez, J. Miller, A. Teplukhin, G. Malenkov, V. Poltev 1209. Bioactive conformation of a potent stromelysin inhibitor determined by X-nucleus filtered and multidimensional NMR spectroscopy. N. C. Gonnella, Y-C. Li, X. Zhang, C. G. Paris 1210. Interaction energy and conformational studies of protein complexes. N. C. Braier, S. Bogusz, E. Billings, B. R. Brooks 1211. Theoretical study of the photoreaction of Cd(4s1, 4p 1 ; 1P and 3P) with SiH4. H. Luna-Garcia, M. Morales-Rodriguez, E. J. Solano, S. Castillo, A. Ramirez-Solis 1212. Molecular mechanics study of correla­ tions between DNA chemical modification and its biological properties. V. Poltev, S. Filippov, E. Nesterova, V. Chuprina, A. Teplukhin, E. Gonzalez 1213. Identification of chemical nonstationary processes based on Gaussian smoothing technique. T. I. Poznyak, A. S. Poznyak 1214. Monte Carlo modeling of molecular or­ dering in monomolecular adlayers. A. Trokhymchuk, A. Huerta, O. Pizio, S. Sokolowski, N. Batina 1215. Theory and computer modeling of chemical association with directional bond­ ing. A. Trokhymchuk, I. Garcia Olmedo, S. Sokolowski 1216. Correlation between thermal electron absorbities and electronic properties of steroids by PM3 method. (Sp) L. Ugarte, J. Mendieta P., C. Kubli G. Symposium on Microscale Chemistry Experiments (501) 1217. Microscale flame analysis. (Sp) M. S. Aguayo 1218. Microscale changes of state. (Sp) N. Zamudio-Abarca 1219. Analysis of water for industrial use. (Sp) G. Castaneda 1220. Practical microscale organic synthesis for undergraduates. (Sp) M. Roa, E. Reynoso, M. Albores 1221. Microscale chemistry at the FES-Zaragoza of the Universidad Nacional Autonoma de Mexico. (Sp) A. G. Rojas-Fernândez 1222. Microscale techniques for the removal of heavy metals in contaminated soils. (Sp) M. C. Doria, R. Jimenez 1223. Demonstration of the efficiency of wastewater disinfection by chemical agents using microscale techniques. (Sp) M. C. Doria, R. Jimenez 1224. Colored chemical tests for identifying carbohydrates: A microscale version. (Sp) J. A. Rodriguez-Arzave, E. Velâzquez-Barron 1225. Microscale chlorine obtention. (Sp) I. A. Valeriano, L. F. Castro 1226. Dialysis at the microscale level. (Sp) V. Cervantes-Nemer 1227. Characterization of industrial effluents. (Sp) E. Garcia-Pintor

64

SEPTEMBER 15, 1997 C&EN

Education: General 1228. Differential Aptitude Test (DAT): An instrument that determines whether students show a significant difference in aptitude between beginning and finishing a course of study. R. L. R. Cornejo, A. R. Garritz, J. P. Patlan 1229. System for the creation and use of serialized documents in chemical education. J. J. Lagowski, A. Mcintosh, S-L. Yang 1230. Differential Aptitude Test (DAT): An instrument that measures aptitudes developed during the study of a career. R. L. R. Cornejo, A. R. Garritz, J. P. Patlan 1231. Chemical equilibrium constant: A lab experiment. (Sp) R. E. Dominguez, M. T. Herrera 1232. First on-line course in chemistry. S. Gupta 1233. Esters as derivatives of carboxylic acids, in an organic chemistry laboratory: Their importance in the perfumery and food industries. (Sp) P. Elizalde-Galvan, F. Leon-Cedeno, E. Santos-Santos 1234. Strategy for the educational resource optimization. D. D. Ramiro, L. L. Mercedes, G. R. Andoni, D. R. Rosa Luz 1235. Instructional software for teaching and learning: The next generation. L. W. Fine, N. J. Turro 1236. A World Wide Web NMR spectrometer for distance education. M. L. Buszko 1237. Teaching infrared spectroscopy in undergraduate education computational programs. (Sp) L. L. Ballester, A. M. Galano, J. Centeno 1238. Impact of student advisers in a university thermodynamics course. N. de la Torre, K. Almeida, F. Reyes, R. Bernai 1239. Practical demonstrations in an interfacial phenomena course. N. de la Torre, L. Acevedo, R. Huesca 1240. Inorganic components of avocado peels: Paper chromatography detection. A. E. Dominguez-Perez, V. Diaz-Lopez 1241. Potentiometric determination of nicotine and total alkaloids in tobacco extract. (Sp) G. I. Fernandez, A. G. Lira 1242. Development of general documentation for a quality system in higher education. (Sp) C. B. Giral, M. S. R. Alpizar, M. E. M. Jaimes, N. M. Gonzalez 1243. Practice of pharmacy in Mexico toward international standards. (Sp) C. Giral, M. P. Garcia 1244. Silver and gold electrodes as an alternative to the calomel and platinum ones, in reduction oxidation titrations between FeS0 4 and KMn0 4 . F. G. Garcia, Μ. V. Atilano, Ε. R. Hernandez, L. G. Leon, J. J. S. Perez 1245. Learning experiences with chromatog­ raphy applied to oil by-products. A. GarciaOsornio, P. Garcia-Estrada, V. O. Hernandez-Palacios, M. V. Tapia-Sanchez 1246. Benzoin oxidation. (Sp) C. Garcia-Manrique, E. Santos-Santos 1247. Studies of Paal-Knorr and the ClausonKaas modification for the synthesis of pyr­ roles, using aniline and its derivatives. (Sp) J. Gomez-Duenas, R. Lopez-Santiago, E. Morales-Zamudio, E. Santos-Santos, G. Salazar-Vela, F. Leon-Cedeno 1248. Graduates of higher education study of the five careers related to pharmacy at the university. N. M. Gonzalez, C. B. Giral, S. A. Ramos 1249. Mechanisms of enzymatic reactions in metabolic processes. (Sp) M. Y. Gonzalez-Quezada, F. Aguilar-Perez 1250. "Damas Chinas" as a tool for teaching the principles of solid-state chemistry. E. Gonzalez-Vergara 1251. Parametric representation and cubic re­ gression techniques in the classroom. Ν. Ε. Hernandez, J. Noriega 1252. Teaching the use of neural networks to chemical engineering students. (Sp) R. P. Hernandez-Garcia, G. Amaya-Ventura 1253. Educational software for electrochemi­ cal principles. (Sp) A. M. Romero, E. G. Ramirez, J. C. Rodriguez, F. Hervert 1254. Teaching materials as a tool in order to achieve meaningful learning. (Sp) M. Ramirez-Manzano, I. M. Covarribias-Silva, F. Dominguez-Sanchez, E. A. Chapa-Resendez, M. Trujillo-Flores 1255. Active methods: Expectations, achieve­ ments, and necessities. (Sp) R. J. Socorro, A. C. Carlos, M. M. Anastasia, M. A. Soledad

1256. Is AG°R < 0 an effective prediction fac­ tor? (Sp) M. Ramirez-Manzano, E. A. Chapa-Resendez, I. M. Covarrubias-Silva 1257. Increasing interest in chemistry. (Sp) J. Rocha, N. Cavazos, E. Torres, G. Garcia 1258. Computer program to homologate data in the international units system. C. E. Roquero-Garcia, R. Mendoza-Serna, M. Cruz-Millan 1259. Material models for atomic and bond­ ing concepts. (Sp) M. Guzman, E. Loyo, G. Rosales 1260. Chemical education: A prospective point of view. (Sp) L. B. Santos-Aquino, E. Tena-Lopez 1261. IPN against the struggle in science and technology. (Sp) E. Tena-Lopez, L. B. Santos-Aquino 1262. New trends on the implementation of microscale procedures in laboratory cours­ es: Our experience with undergraduates majoring in clinical chemistry. (Sp) E. Torres, J. L. Lopez, J. P. Castrellon 1263. Optimization strategy. (Sp) Ν. Ν. Trevino 1264. Methodology of thermodynamics teach­ ing: Constructivist vision. (Sp) M. A. Valderrabano, E. Ramirez, H. Luna, L. R. Ortiz, R. Hernandez, L. F. Castillo 1265. Projection of experiments on chemical reactions. S. Tejada, E. Guevara 1266. Reference-states and activities. A. Valderrama-Cano 1267. Teaching of chemical engineering in the faculty of chemistry at UNAM. A. ValienteBarderas 1268. Surface phenomena workshop—I. (Sp) M. Vargas, I. Vargas, M. Rivera, A. Obaya 1269. Experimental classes? No! Experimen­ tal solutions. (Sp) J. Viades-Trejo 1270. Laboratory manual. (Sp) M. Trevino de Ortega, B. E. Villarreal de Salinas, F. Cantu, V. Hinojosa, S. M. Sanchez 1271. Study guide for organic chemistry. (Sp) B. E. Villarreal de Salinas, M. Trevino de Ortega, F. Cantu, V. Hinojosa, S. M. San­ chez 1272. Technical college education and its lack of bonds with social sciences. (Sp) B. Zamora Celis, I. M. Covarrubias Silva, A. M. Atencio de la Rosa Centro de Convenciones Cozumel 2 Symposium on Chemistry of Kenaf: Properties and Materials (505) 1273. Standardizing kenaf plot yield determi­ nation. J. W. Sij, M. S. Nunez 1274. Genetic transformation of kenaf. R. H. Smith, M. Srivatanakul, J. W. Sij, C. L. Webber III 1275. Chemical relationships of kenaf growth in saline soils. M. S. Bhangoo, C. G. Cook 1276. Chemical and physical factors involved in reproductive growth for kenaf seed. C. G. Colorado, D. B. Mullens Jr. 1277. Allelopathic activity of kenaf plant ma­ terial. C. L. Webber III, D. L. Myers, V. M. Russo 1278. Kenaf as a cut-and-carry crop for tropical small farmers. C. Cross, N. M. Redozno 1279. Benefits of separating the bark and core fibers and a technical and economic analysis of the alternative technologies available. A. F. Kaldor 1280. Some chemical constituents of four cultivars of kenaf. P. Chow, M. Raheel, R. J. Lambert, R. Meimban, D. S. Bajwa, C. G. Cook 1281. Characterization of kenaf core and bast using pyrolysis mass spectrometry. W. H. Morrison III, D. E. Akin 1282. Effect of solvent extraction on the sur­ face energy of kenaf powder. M. A. Tshabalala, J. S. Han 1283. Validity of plant fiber length measure­ ment: A review of fiber length measurement based on kenaf as a model. J. S. Han 1284. Chemical composition of kenaf seed oil. C. L. Webber III, A. Mohamed, H. Bhardwaj, A. Hamama 1285. DMNQ (3,8-dimethy-1 ^-naphthoquin­ one): A class of phytoalexins isolated from kenaf (Hibiscus cannabinus). J. A. Veech, A. A. Bell 1286. Bleaching and dyeing of kenaf fibers. S. Romanoschi, O. Romanoschi, B. J. Col­ lier, J. R. Collier, I. I. Negulescu

1287. Yarns and fabrics made from kenaf and cotton. P. Bel-Berger, L. Kimmel, G. N. Ramaswamy 1288. Nonwoven kenaf fiber mat as a sub­ strate for establishing high-quality soilless sod. B. S. Baldwin, K. Hensler, J. M. Goatley 1289. Production properties of industrialgrade kenaf particleboard. C. L. Webber III, C. D. Ray, R. E. Bledsoe 1290. Kenaf composite sports wheelchair. M. Bhuta, H. L. Hall, J. M. Zimmerman, T. N. Burcham, E. P. Columbus, M. J. Fuller 1291. Chemical and structural study of kenaf fiber in oil adsorption. J. S. Han, B. Lee 1292. Kenaf fiber as a stormwater filtration substrate. J. S. Han, E. S. Miyashita, Y. Lin 1293. Commercial application of kenaf in pet­ rochemical industries: Environmentally re­ sponsible solutions. J. A. Pearson 1294. Refiner mechanical pulping of kenaf bast fiber. D. Mohta, D. N. Roy, P. Whit­ ing, A. Chatterjee Symposium on Structure and Properties of Lignocellulosic Materials (611) 1295. TCF bleaching sequences with oxygenbased agents: Influence of enzyme, acid, and reductive stages on selectivity and car­ bohydrates. M. B. Roncero, A. L. Torres, J. F. Colom, T. Vidal 1296. Network characterization of phenolformaldehyde thermosetting wood adhe­ sive. R. G. Schmidt, C. E. Frazier 1297. Thermal analysis of wood/polymer composites. T. G. Rials 1298. Lignin oxidation reactions: Results from computational chemistry. T. Elder 1299. Aldehyde content determined by the copper number method as an indication of labile sites in pulp polysaccharides. T. L. Tamminen, A. G. M. Fuhrmann, U. J. Suppanen, I. V. Forsskahl 1300. Process status in a continuous process. A. Skoglund, A. Brundin, D. F. Mandenlus 1301. Liquid-mode AFM analysis of changing cellulose microfibrillar structure with the change of crystalline structure during wood cell wall formation. T. Kondo, Y. Kataoka 1302. Analysis of noncrystalline regions of drawn cellulose films by a deuterationFTIR method. Y. Hishikawa, E. Togawa, T. Kondo 1303. Structure of drawn cellulose films pre­ pared from water-swollen cellulose. E. To­ gawa, T. Kondo 1304. Upgrading spent liquors from NSSC process. (Sp) M. C. Area, F. E. Felissia, C. E. Nunez, A. Venica, J. L. Valade 1305. Mass spectrometric studies of the pho­ tochemical reactions of lignin compounds. N. A. Weir 1306. Ester cross-linking of cellulose and the properties of cotton textiles and paper. C. Q. Yang 1307. Microscopic strain mapping of lignocel­ lulosic fibers. S. Shaler, L. Mott, L. H. Groom 1308. Cellulose ester blends. S. Kelley, M. F. Davis, M. D. Myers 1309. Topochemistry of laccasse/A/-hydroxybenzothazole bleaching of kraft pulps. K. Haynes, A. Ragauskas 1310. 1H and 13C spectroscopy in investiga­ tion of lignin solvation. M. Y. Zarubin, M. Kiryushina, T. Fedulina, T. Sokolova 1311. Chemical heterogeneity in the wood lignins. Y-Z. Lai, M. Funaoka, H-T. Chen 1312. N-Functionalization of kraft lignin by catalytic ammoxidation. V. Gonzalez, A. Martinez, A. Curvelo, V. Zuniga-Partida 1313. Fundamental investigation into alkaline extraction reactions of kraft lignins. T. Runge, A. Ragauskas Symposium on International Pesticide Product Registration Requirements: Similarities, Differences, and the Road to Mutual Acceptability (613) 1314. Metabolism of 14C-CL 299263 in wheat, corn, soybeans, and field peas. J. M. Lansinger, T. Y. Chiu, J. Zulalian, D. H. John­ son, R. J. McDonell, W. E. Horion 1315. Pharmacokinetics, absorption, disposi­ tion, and metabolism of 14C-CL 299263 in rats. T. Y. Chiu, S. M. Kenny, R. J. Mc­ Donnell, W. E. Horton

1316. Moxidectin: Metabolic fate and blood pharmacokinetics of 14C-labeled moxidec­ tin in equids. J. Afzal, A. B. Burke, P. L. Batten, R. L. DeLay, P. Miller 1317. Bioassay: Guided isolation of the most active compound of Argentinian Melia azedarach L. against Epilachna paenulata. M. C. Carpinella, C. E. Vaccarini, C. G. Ferrayoli, R. A. Alonso, S. M. Palacios 1318. Alteration of seed germination induced by pesticides. I. Sanchez, G. Flores-Rosales

THURSDAY LATE AFTERNOON Special Event

Fiesta Americana Coral Beach Coral Sea I Symposium on International Pesticide Product Registration Requirements: Similarities, Differences, and the Road to Mutual Acceptability (613)

A. Velez, Presiding 3:00-5:30 PM Centro de Convenciones

Agrochemistry: General

Cozumel 5 Presentation on Codex Badiano

1319. Tejocote jam. (Sp) A. M. RamirezSchoettlin, L. Olguin-Martinez, L. Rojas-Hernandez, Y. Lira, T. Favela-Torres, I. Esquivel-lbarra 1320. Evaluation of phenolic acids in leaves of two maize lines with different response to attach southwestern corn borer, Diatraea grandiosella. (Sp) F. C. Rangel, E. L. Rios, B. Zuniga, P. Guevara, M. B. Perez-Amador, J. Herreras 1321. Phytotoxic metabolites from Phoma sp. (Sp) F. Rivero, G. Garcia, C. Perez, A. Gamboa, R. Mata 1322. Corn volatiles: A partial strategy to avoid stored-grain infestation. J. Saenz, J. Gutierrez, E. Rojas, M. Ailbores 1323. Ca and Mg in Agave tequilana. (Sp) L. Salinas, T. Ogura, E. Legorreta, L. Soffchi, J. Avila 1324. Study on corn macromolecules during storage. (Sp) L S. Sanchez, M. A. Valdivia, J. Sandoval, E. Moreno 1325. Biotechnology in agricultural land ento­ mology. V. Melo, M. Alarcon 1326. Edible wood caterpillar Aplagiognathus spinosus high in protein. V. Melo, M. Bar­ ron, G. Barjau, L. Jimenez 1327. Seasonal effect on soil organic carbon and nitrogen compounds in a tropical de­ ciduous forest ecosystem in western Mex­ ico. (Sp) M. G. Oliva, A. Hernandez, F. Garcia-Oliva 1328. Lycopene extraction from standard to­ matoes for use as a food colorant. S. E. Valdes-Martinez, A. Michel, E. AngelesAnguiano 1329. Strain selection and adaptation of Pleorotus ostreatus for culture in a rural commu­ nity at Morelos State, Mexico. (Sp) L. G. Vierna, J. A. Alvarez, C. Burguette 1330. Treatment of avocado pastes by sev­ eral techniques. (Sp) M. E. Jimenez-Vieyra, L. Dorantes-Alvarez, H. Hernandez-San­ chez, M. Gonzalez-Valdes 1331. 4,2',5'-Trihydroxychalcone and other fungistatic compounds from Platymiscium yucatanum heartwood. (Sp) M. JimenezEstrada 1332. Additional insecticidal limonoids from Swietenia humilis Zucc. (Meliaceae). (Sp) A. Jimenez, R. Mata, J. T. Arnason 1333. Phytotoxic activity of Sicyos deppei {Cucurbitaceae). B. Hernandez-Bautista, A. L. Anaya, A. Torres-Barragan, G. Rios-Lopez, R. Mata 1334. Glycoalkaloids content in four wild po­ tato species. (Sp) V. J. Hernandez-Abad, A. Sotelo, M. Deciga, A. Ruiz-Cancino 1335. Photosynthetic activities of maduramicin and related polyether antibiotics pro­ duced by the actinomycete MIV2B(31). M. T. Gutierrez-Lugo, B. Lotina-Hennsen, A. Farres, S. Sanchez, R. Mata 1336. Pineapple partially dehydrated. H. R. Guerrero, I. I. Esquivel, T. T. Favela 1337. Lemon eggnog. T. T. Favela, G. J. Or­ tiz, R. J. Manriquez, M. L. Olguin, R. E. Su­ va, G. A. Camacho, Y. Lira 1338. Vizcaine cabbage development tech­ nology. I. I. Esquivel, H. R. Guerrero, G. S. Cerero, T. T. Favela 1339. Pasteurized lime juice. I. I. Esquivel, H. R. Guerrero, S. A. Ramirez 1340. Sensorial effect of lactic cultivates in vegetarian sausage made of soya. A. Cortes 1341. Functional properties of proteic concen­ trations of bovine blood plasma. A. Cortes, R. Castellanos, F. Martinez, C. Cruz 1342. Manufacture of a pork-sausage-type product using chicken meat: Treatment with lactic bacterias. A. Cortes 1343. Protein efficient relation (PER) of the blood plasma of bovine obtained by acid pre­ cipitation and drying by sprinkling. A. Cortes, R. Castellanos, F. Martinez, C. Cruz

M. Sanjurjo, Speaker

THURSDAY EVENING Session 3 Area 01—Agrochemistry Hotel El Camino Real Camino Real III Symposium on Phytochemicals and Phytopharmaceuticals (503)

F. Shahidi, Presiding 6:00—Introductory Remarks. 6:05—1344. Comparing research incentives for functional foods and phytochemicals: U.S. policy and industry preference. Ν. Μ. Childs, R. Witwer 6:25—1345. Antioxidant activity of quercetin and (-)-epicatechin in rat plasma: Intragastrical administration and their metabo­ lites. J. Terao, M. Piskula, E. L. da Silva 6:45—1346. Physiological activity of dietary phenolic antioxidants. T. Osawa 7:05—1347. Protective role of curcuminoids in oxidative stress. T. Osawa 7:25—Intermission. 7:45—1348. Opportunities bringing technolo­ gy-based foods to the food market. J. W. Finley 8:05—1349. Inhibition of carcinogenesis by tea constituents and the mechanisms in­ volved. C. S. Yang, G-Y. Yang, J. Landau, L. Chen, M-J. Lee 8:25—1350. Antitumor activity of an extract of the gum resin exudate of Boswellia serrata. C-T. Ho, Y. Shao, W. Ma, V. Badmaev, C-K. Chin, M-T. Huang 8:45—1351. Antitumor-promoting activity of an extract of the gum resin exudate of Bo­ swellia serrata. M-T. Huang, J-G. Xie, Y-R. Lou, Y-P. Lu, V. Badmaev, C-T. Ho 9:05—1352. Antibacterial actions of tea poly­ phenols and their practical applications in humans. Y. Hara Centro de Convenciones Cozumel 5 Symposium on Chemistry of Kenaf: Properties and Materials (505)

J. R. Collier, Presiding 6:00—Introductory Remarks. 6:02—1353. Chemical and structural proper­ ties of kenaf cell types. D. E. Akin, W. H. Morrison III, L. L. Rigsby 6:20—1354. Some important physical char­ acteristics of kenaf fiber bundles and of the ultimate kenaf fibers. W. Tao, T. A. Calamari Jr. 6:40—1355. Value-added textile products made from kenaf. O. Romanoschi, J. R. Collier, S. Romanoschi, B. J. Collier 7:00—1356. End-use performance of kenaf/ cotton textiles. G. N. Ramaswamy 7:20—1357. Rheological properties of kenaf lyocell solutions. O. Ramanoschi, J. R. Collier, B. J. Collier, I. I. Negulescu 7:40—Intermission. 8:00—1358. Use of kenaf for bioremediation of soil contaminated with creosote, pentachlorophenol, and/or polychlorinated biphenyls. S. V. Diehl, A. Borazjani, D. A. Strobel 8:20—1359. Kenaf as an absorbent, body feed filter aid and coalescence aid. T. G. Cleveland, W. G. Rixey, F. M. Tiller, Β. Κ. Varghese, H. Liu 8:40—1360. Development and evaluation of kenaf-based (peat-free) growth media for horticultural crops. N. A. Relchert, B. S. Baldwin

5:55—Introductory Remarks. 6:00—1361. Pesticides registration process in Mexico. J. P. Serres 6:30—1362. Good laboratory practices and pesticide regulation in Mexico. A. Velez 7:00—1363. Laboratory registration/certifica­ tion services in Brazil: INMETRO. D. A. Liechoscki, G. G. Bicho 7:30—1364. Brazil environmental asessment of pesticides. R. D. Trein, S. M. S. M. Filgueiras, G. S. J. Dubois, E. R. Santos 8:00—1365. Brazilian and South American pesticide registration: Perspective from the industry. T. R. Machado 8:30—1366. Registration of plant protection products: Comparison of the Americas and EU models. H. F. Galicia 9:00—1367. Status of pesticides control in Cordoba, Argentina. M. Nassetta Centro de Convenciones Cancun 1 Symposium on Chemical and Biological Aspects of the Manufacturing Process of Beer (630)

A. Canales, Presiding 6:00—1368. Importance of the chemical com­ position of brewing water. M. J. McGarrity 6:3fJ—1369. Advanced analytical chemistry in the brewing industry. S. Dupire 7:00—1370. Lightstruck reaction in beer. A. C. Weedon 7:30—1371. Application of CADE in optimiz­ ing fermentation parameters for special­ ized high-gravity fermentations. G. Casey, A. Liedtke, L. Stenroos 8:00—Intermission. 8:15—1372. Sensorial analysis/taste testing session.

Area 02—Biochemical/Medicinal/ Pharmaceutical Hotel El Camino Real Camino Real IV Symposium on Chemicals via Higher Plant Bioengineering (546)

G. Fuller, Presiding 6:00—Introductory Remarks. 6:05—1373. Production of food colorants by plant cell culture: The case of betalains. A. R. Jimenez, M. Rodriquez, G. Gutierrez 6:35—1374. Recent progress in biotechnolo­ gy of Mexican medical plants. M. L. Villarreal 7:05—1375. Ricinoleate production and lipid incorporation by castor microsomes. J-T. Lin, C. L. Woodruff, T. A. McKeon 7:35—Intermission. 7:55—1376. Molecular strategies to improve the nutritional quality of legume protein. B. O. de Lumen, A. F. Galvez, J. M. Revilleza 8:25—1377. Metabolic engineering of tomato for improved fruit quality. A. B. Bennett Centro de Convenciones Cancun 3 Symposium on Combinatorial Chemistry (557)

H. M. Geysen, Presiding 6:00—Introductory Remarks. 6:05—1378. Heterocyclic positional scanning combinatorial libraries. R. A. Houghten 6:50—1379. Application of the "one-bead, one-compound" combinatorial library meth­ od for signal transduction research. K. S. Lam 7:35—1380. New perspectives in syntheses and characterization of supported com­ pounds. K. Burgess, D. Lim, W. Li, A. J. Zhang, C. Martinez 8:20—1381. Encoded combinatorial libraries. H. M. Geysen 9:05—1382. Automated approaches to chemistry development for small-molecule combinatorial libraries. P. van Eikeren, O. Gooding, J. Labadie, J. Porco

Centro de Convenciones Cozumel 4 Symposium on the Role of Nickel in Biology and Catalysis (612) Ni in Catalysis

J. G. Reynolds, Presiding 6:00—Introductory Remarks. 6:20—1383. Nickel in petroleum refining. J. G. Reynolds 7:00—1384. Synthesis of geochemically sig­ nificant porphyrins with fused carbocyclic rings. T. D. Lash, W. Li 7:30—1385. Desulfurization mechanisms on single-crystal nickel surfaces. D. R. Huntley 8:00—1386. Olefin polymerizations cata­ lyzed by nickel complexes. L. Johnson, S. Arthur, A. Bennett, B. Coughlin, J. Feldman, S. Ittel, K. Kreutzer, E. McCord, S. McLain, L. Nelson, A. Parthasarathy, L. Wang, Y. Wang 8:30—1387. Applications of low-valent nickel phosphine complexes to the preparation of chlorofluorocarbon (CFC) alternatives. R. T. Baker, R. P. Beatty, R. L. Wallace, A. C. Sievert, R. L. Harlow 9:00—1388. Nickel metallacrowns: Inorganic molecular recognition agents. V. L. Pecoraro, A. J. Stemmler, J. Bodwin, J. Halfen, J. Kampf 9:30—1389. Design and synthesis of polydentate metal-thiolate complexes as func­ tional models for the nickel center in pro­ teins. M. Millar

Area 03—Business and Economics Applied to Chemistry Fiesta Americana Coral Beach Coral Island II Symposium on Impact of Laws and Regulations on the Utilization of Chemistry in North America (519) Environmental Matters

A. O. Robertson, Presiding 6:00—1390. Mexican-environmental regula­ tory system and NAFTA: Impact on the chemical industry. Ε. Μ. Ranger 6:35—1391. Regulation of chemical sub­ stances in North America: Lessons to be learned or ignored. J. C. Powell 7:10—1392. Council of the Commission for Environmental Cooperation Resolution #955. T. M. Schauer 7:45—1393. Mock trial: Exposure to toxic chemicals. J. C. Carver

Area 05—Education Centro de Convenciones Isla Mujeres 3 & 4 Symposium on Teacher Training in High School Chemistry (533)

D. E. Jones, Presiding 6:30—Introductory Remarks. 6:35—1394. History of the chemical scienc­ es: Educational perspectives. M. W. Orna 7:05—1395. Can chemistry be cool? G. Lind 7:35—1396. Changing the focus: From lec­ ture to inquiry, from teacher to student. S. Ware 8:05—1397. Demonstration assessments in chemistry. W. C. Deese, L. L. Ramsey, D. L. Radford Centro de Convenciones Xcaret 3 Symposium on Relevant Content for General Chemistry (540)

S. J. Hawkes, Presiding 6:00—Introductory Remarks. 6:10—1398. General chemistry: Content or methodology? G. Hernândez-Millân 6:40—1399. Abilities development through general chemistry. C. Reza-Garcia 7:10—1400. Reconceptualization of our approach to teaching bonding in the first-year course. G. Bodner 7:40—Intermission. 7:50—1401. Bonding without orbitals: The analysis of electron densities and the domain model. R. Gillespie 8:20—1402. Explanation of molecular structure in general chemistry. J. Ogilvie 8:50—Discussion.

SEPTEMBER 15, 1997 C&EN 6 5

THURSDAY/FRIDAY/TECHNICAL PROGRAM

Centro de Convenciones Isla Mujeres 1 & 2 Symposium on Multimedia Authorware Programs (542)

R. Sandoval, Presiding 6:00—1403. Industrial process-based curric­ ulum for chemical technology students. P. Kelter, J. Grundman, T. Johnson, J. Carr 6:40—1404. Pulling out all the stops: Apply­ ing technology to every facet of chemical education. J. Reeves 7:30—1405. Multimedia applications in ana­ lytical chemistry. A. Quere 8:10—1406. Multimedia applications in the aromaticity concept. C. Ruis-Alonso 8:40—1407. Using hypermedia to teach inter­ pretation of spectroscopic data. P. Schatz Centro de Convenciones Cozumel 1 Symposium on New Trends in Atomic and Molecular Structure Teaching (544) J. Robles,

Presiding

6:00—Introductory Remarks. 6:05—1408. Symmetry eigenfunction tools for research and training. G. Cisneros 6:35—1409. Molecular modeling in biochem­ istry. S. Zimmermann 7:05—1410. Practical electronic structure methods. W. Hehre Centro de Convenciones Xcaret 2 Symposium on Methods for Accommodating Students with Disabilities in Chemistry Programs (614)

J. E. Teggins, Presiding 6:00—Introductory Remarks. 6:05—1411. Accommodation of students with physical disabilities. J. E. Teggins, C. A. L. Mahaffy, R. Richardson, N. B. McDaniel, G. L. Wolfe, R. L. Bigelow 6:25—1412. Physically disabled students in chemistry: The Swedish experience. M. Lundberg 6:45—1413. Focusing on strengths in lecture and laboratory courses. C. Colaci 7:05—1414. Students with disabilities major­ ing in science, engineering, mathematics, and technology. J. Blackorby 7:25—Discussion.

C. Colaci, Presiding 7:45—1415. Use of a terminal appliance to augment a paralyzed hand to allow a col­ lege student to participate in classroom and laboratory activities. J. A. Katz 8:05—1416. Novel tactile molecular models by laser stereolithography. W. J. Skawinski, A. D. Ofsievich, C. A. Venanzi 8:25—1417. Students with disabilities in chemistry: A student's perspective. B. Lendrum 8:45—1418. Chemistry laboratory accommo­ dations for students with disabilities in the undergraduate laboratory. C. A. L. Mahaf­ fy, J. E. Teggins 9:05—Concluding Remarks. C. A. L. Mahaffy

Area 06—Energy/Industrial/Applied/ Engineering Fiesta Americana Coral Beach Coral Garden I Symposium on Environmental Catalysis (515)

R. G. Herman, Presiding 6:00—1419. Plenary Lecture. Catalysis of the synthesis of oxygenates. K. Klier 6:45—1420. Alkali-promoted spinel oxide catalysts for the synthesis of alcohol fuels. D. M. Minahan, W. M. Hart, W. S. Epling, G. B. Hoflund 7:10—1421. Synthesis of higher alcohols on metal-base bifunctional catalysts. M. Xu, M. Gines, A-M. Hilmen, E. Iglesia 7:35—Intermission. 7:50—1422. Chemicals, transportation fuels, and transportation fuel additives from syn­ thesis gas. F. J. Waller, P. J. A. Tijm, B. A. Toseland

66

SEPTEMBER 15, 1997 C&EN

8:15—1423. Novel large-scale DME manu­ facture for clean diesel fuel applications. T. H. Fleisch, A. Basu, M. J. Gradassi, J. B. Hansen, I. Dybkjaer 8:40—1424. Novel technology for environ­ mentally benign synthesis of methyl methacrylate. J. J. Spivey, M. R. Gogate, J. R. Zoeller, R. D. Colberg, G. N. Choi 9:05—1425. Mechanistic and kinetic analysis of CO insertion reaction on Rh-supported catalyst. S. S. C. Chuang, M. A. Brundage

Area 07—Environment Fiesta Americana Coral Beach Coral Island I Symposium on Field-Portable Instrumentation for Environmental Analysis (620)

V. D. Adams, Presiding 6:00—Introductory Remarks. K. J. Voorhees 6:10—1426. Advances in field-portable GCMS. B. Eckenrode 6:35—1427. New field method for analysis of VOCs by field-portable GC-MS. S. J. DeLuca, J. W. Peeler, L. L. Kinner 7:00—1428. Rapid subsurface detection of volatile organic compounds in groundwater. G. Robitaille, P. Kelley 7:25—Intermission. 7:40—1429. Development and applications of field-portable ion trap mass spectrome­ ters. S. A. Lammert, M. B. Wise, Κ. Η. Hart, C. V. Thompson 8:05—1430. Bacterial detection and differenti­ ation with a field-portable pyrolysis ion trap mass spectrometer. F. Basile, K. J. Voor­ hees 8:30—1431. Chemical biological mass spec­ trometer. D. W. Sickenburger 8:55—1432. Portable mass spectrometers in special applications. J. Franzen, A. Brekenfeld, M. Rather Centro de Convenciones Press Room Symposium on Oxygenated Fuels and Urban Air Quality in the Americas (623) H. Bravo Α., Presiding 6:00—1433. Atmospheric chemistry of alco­ hols and ethers. D. Grosjean, E. Grosjean 6:40—1434. Impact of reformulated gasoline on ambient air quality in the South Coast Air Basin, California. B. Zielinska, G. Harshfield, J. Shire, J. Sagebiel 7:20—1435. Effects of using oxygenated fuels on carbon monoxide concentrations and carbon monoxide and nitrogen oxides emis­ sions in Denver, Colo. L. G. Anderson, J. A. Lanning, E. Wilkes, P. Wolfe 8:00—Intermission. 8:15—1436. Atmospheric levels of formalde­ hyde and acetaldehyde and their relation­ ship with the vehicular fleet composition in Salvador, Bahia, Brazil. J. B. de Andrade, M. V. S. de Andrade, H. L. C. Pinheiro 8:55—1437. Comparison of PAN levels with ozone and nitrogen oxide concentrations in Mexico City air. J. S. Gaffney, N. A. Marley, J. L. A. Colina Fiesta Americana Coral Beach Coral Garden II Symposium on Industrial Cleaning without Chlorofluorocarbons (627)

S. S. Seelig, Presiding 6:00—Introductory Remarks. 6:05—1438. Industrial cleaning chemistries without ozone depletion and global warm­ ing: Where do we go from here? S. S. Seelig 6:40—1439. Total equivalent warming impact: An approach to evaluate the overall green­ house warming potential of cleaning sys­ tems. H. Magid 7:15—1440. Volatile methyl siloxanes: Envi­ ronmentally benign solvents. D. E. Wil­ liams 7:50—1441. Aqueous industrial waste: A new challenge. S. Bolkan, G. Sanko 8:25—1442. C0 2 pellet cleaning technology. S. J. Cooke, B. Green, K. Zeedyk 9:00—1443. Gas plasma: A dry process for cleaning and surface treatment. D. A. Doane, L. A. Rigali

Area 08—Macromolecular Hotel El Camino Real Camino Real I Symposium on Polymers from Acetylenic Compounds (528)

Β. Μ. Foxman, Presiding 6:00—Introductory Remarks. 6:10—1444. Acetylene polymerization under chiral nematic reaction field. G-Z. Piao, S. Haramizu, S. Kaneko, K. Akagi, H. Shirakawa 6:45—1445. Substituted ionic polyacetylenes. A. Blumstein 7:20—1446. Polyphenylacetylenes capable of chiral discrimination and detection. Y. Okamoto, E. Yashima 7:55—1447. Synthesis and characterization of acetylene-containing hyperbranched poly­ mers and well-defined oligomers. S. Fomine, L. Fomina, P. Guadarrama, R. Salcedo 8:30—1448. Synthesis and characterization of polymers consisting of organometallic πcomplexes and alkyne or butadiyne units. U. H. F. Bunz, S. Setayesh, M. W. Altmann Hotel El Camino Real Camino Real II Symposium on Compositional and Morphological Aspects of Higher Performance Catalysts and Composites (618) Catalysis M. Viniegra Ramirez,

Presiding

6:00—Introductory Remarks. 6:10—1449. Bimetallic catalysts for (NO)x re­ duction. G. Diaz 6:50—1450. Low-temperature isomerization catalysts. J. Domingues Esquivel 7:30—1451. Semiconductor-mediated photocatalysis for multistep organic synthesis. H. Wang, L. Wang, R. Partch, Y. Li 8:10—1452. Mixed oxides and composites as supports for hydrotreating catalysts. T. Viveros-Garcia, J. A. de los Reyes-Heredia Hotel El Camino Real Camino Real V Symposium on Natural Polymers as Advanced Materials (626)

R. H. Marchessault, Presiding 6:00—1453. Recent insights into cellulose hy­ drolysis by microorganisms. N. Gilkes, D. Kilburn, E. Kwan, S. Mansfield, J. Saddler, H. Stalbrand, P. Tomme, T. Warren 6:35—1454. Blends of cellulose with synthet­ ic polymers. R. S. J. Manley 7:00—1455. Parenchyma cell cellulose from sugar beet pulp: Extraction, characteriza­ tion, and prospects. E. Dinand, H. Chanzy, M. R. Vignon 7:25—1456. Nanocomposite materials of ther­ moplastic polymers reinforced by polysac­ charide fillers. J. Y. Cavillé, A. Dufresne 7:50—1457. Biodegradable polymers for the delivery of neuroactive agents to the nervous system. D. Maysinger 8:15—1458. New carbohydrate-derived materials for biomedical applications. M. Yalpani 8:40—1459. Interpenetrating polymer networks of proteins. S. J. Huang Fiesta Americana Coral Beach Grand Coral I Symposium on Polymers at Surfaces (634) R. Alexander-Katz, R. E. Prud'homme, Presiding 6:00—Introductory Remarks. 6:05—1460. Segregation strategies toward protein-resistant surfaces. A. M. Mayes, D. G. Walton, J. F. Hester 6:45—1461. Interfacial assembly of macromolecular and bioactive amphiphiles. M. Tirrell 7:25—1462. Theoretical studies on the adsorption of polymers on surfaces. F. Aguilera-Granja 8:05—1463. Self-assembly between polymercoated surfaces. A. C. Balazs, S. S. Chern, G. T. Pickett, E. B. Zhulina, C. Singh

8:45—1464. Controlling polymer surface properties by end-group modification. J. T. Koberstein 9:25—1465. Processing effects on surface formation and related optical properties. R. Alexander-Katz, R. G. Barrera, R. Montiel

Area 09—Special Topics in Organic Chemistry Centro de Convenciones Tulum 3 & 4 Symposium on Moving Toward the Second Century of Carbocation Chemistry (517)

T. T. Tidwell, Presiding 6:00—Introductory Remarks. 6:05—1466. From alkyl cations to protioalkyl dications (alkane dications). G. A. Olah 6:50—1467. X-ray crystal structure analyses of carbocations stabilized by bridging or hyperconjugation. T. Laube 7:25—1468. Experimental and quantum chemical NMR investigations of carbocations. H-U. Siehl 8:05—1469. Flash photolysis study of unusually long-lived carbocations. R. A. McClelland 8:45—1470. Accurate structures for carbocations. P. V. R. Schleyer Centro de Convenciones Cozumel 3 Symposium on Molecular Modeling and Theoretical Chemistry (551) S. Wolfe,

Presiding

6:00—1471. Recent work in molecular mechanics. N. L. Allinger 6:50—1472. Enthalpic and entropie contributions to the conformational preference of sulfide, sulfinyl, and sulfonyl substituents in cyclohexane. E. Juaristi, S. Antunez, V. Labastida 7:20—1473. Computational study of anomeric segments that incorporate sulfur atoms. G. Cuevas 7:50—1474. Ion pair SN2 reactions. A. Streitwieser, G. S-C. Choy, F. Abu-Hasanayn 8:40—1475. Alkyl transfer with retention and inversion of configuration. S. Wolfe, K. Yang, N. Weinberg, Z. Shi, Y-H. Hsieh, R. D. Sharma, S. Ro, R. Batchelor, F. W. B. Einstein, C-K. Kim Centro de Convenciones Cancun 4 Symposium on Natural Products Synthesis (552) S. F. Martin,

Presiding

6:00—Introductory Remarks. 6:05—1476. Recent advances in the enantioselective synthesis of a- and β-amino acids. E. Juaristi, H. Lopez-Ruiz, M. Balderas, A. Reyes, J. L. Leon 6:45—1477. Cycloaddition and fragmenta­ tion reactions and their applications to nat­ ural product synthesis. M. Lautens 7:30—1478. New method for the amide alcoholysis: Scope of the reaction and synthet­ ic applications. A. B. Charette 8:15—1479. Recent developments in marine natural products total synthesis. L. E. Over­ man Centro de Convenciones Xcaret 1 Symposium on Carbon Cage Compounds: Synthesis, Functionalization, and Reactive Intermediates (615) S. M. Bachrach,

Presiding

6:00—Introductory Remarks. Κ. Κ. Laali 6:05—1480. Nitrocubanes: Search and re­ ward. P. E. Eaton 6:25—1481. Polycyclic cage compounds: Re­ agents, substrates, and materials for the 21st century. A. P. Marchand 6:45—1482. Systematic structural deforma­ tions in substituted cubanes and polycubanes. R. Gilardi 7:05—1483. Cubane cage: A sensible probe for substituent effects in four-membered rings. H. Irngartinger, S. Strack, F. Gredel 7:25—Intermission.

A. Bashir-Hashemi, Presiding 7:45—1484. Electron-deficient intermediates involving cubane skeleton. G. K. S. Prakash 8:05—1485. Solvolysis and rearrangement in unsaturated carbon cage compounds. A. J. Bennet, D. T. H. Chou, X. Huang 8:25—1486. Novel molecular structures based upon cubane. R. M. Moriarty 8:45—1487. Chemistry of cage-shaped polyquinanes. T. J. Chow 9:05—1488. Novel tandem 1,3-dipolar cy­ cloaddition reactions of munchnones: An approach to pentaprismane. G. W. Gribble, W. R. Sponholtz III, F. L. Switzer, M. P. Byrn

Area 10—Special Topics in Inorganic Chemistry Centra de Convenciones Tulum 1 & 2 Symposium on Transition-Metal Group 13 Complexes Including Their Roles in Catalytic Processes (514) Transition-Metal Boryl Complexes

S. A. Westcott, Presiding 6:00—Introductory Remarks. 6:05—1489. Complexes containing metalboron bonds: Synthesis, reactions, and structures. H. Noth, C. Stauhal, R. Schur 6:35—1490. Studies of the mechanisms of transition-metal-catalyzed alkyne and alkene diboration reactions. D. G. Musaev, Q. Cui, K. Morokuma 7:05—1491. Boryl complexes of ruthenium and osmium: Syntheses, structures, and reactions. W. R. Roper, G. R. Clark, G. J. Irvine, A. Williamson, L. J. Wright 7:35—1492. Diborane(4) compounds: Proper­ ties and transition-metal-catalyzed dibora­ tion reactions. W. Clegg, F. J. Lawlor, N. C. Norman, N. L. Pickett, C. R. Rice, E. G. Robins, A. J. Scott, C. Dai, G. Lesley, P. Nguyen, A. G. Orpen, M. J. Quayle, N. J. Taylor, T. B. Marder, G. R. Whittell 8:05—1493. Role of transition-metal boryl complexes in homogeneous catalysis. T. B. Marder, C. Dai, F. Souza, G. Lesley, P. Nguyen, S. A. Westcott, E. G. Robins, C. R. Rice, N. L. Pickett, N. C. Norman, A. J. Scott, W. Clegg, C. Wiesauer, W. Weissensteiner 8:35—1494. Early metal boryl and late metal borane complexes: σ-Bond coordination and alkane functionalization. J. F. Hartwig, C. N. Muhoro, K. M. Waltz 9:05—1495. Synthesis, structure, and reac­ tions of boryl and borylene transition-metal complexes. H. Braunschweig, C. Kollann, M. Koster Centra de Convenciones Cancun 5 Symposium on Novel Applications of Organometallic and Inorganometallic Chemistry in Materials Science Novel Polymers (530)

J. F. Harrod, Presiding 6:00—Introductory Remarks. J. F. Harrod 6:10—1496. New organometallic and inor­ ganic macromolecules. H. R. Allcock 6:40—1497. Synthesis and properties of polymetallocenes derived from ring-opening po­ lymerization of highly strained ring-tilted metallocenophanes. I. Manners 7:10—1498. New organometallic electroactive polymers. M. D. Curtis, G. Southard 7:40—Intermission. 8:00—1499. Linear and hyperbranched polycarbosilanes with Si-CH2-Si bridging groups: A convenient synthetic platform for construc­ tion of new functional polymeric materials. L. V. Interrante, I. Rushkin, Q. Shen, B. Farmer 8:30—1500. Polyferrocenylene-silylene, -germylene, -stannylene films. K. H. Panned, L. Espada, H. Sharma, M. Shadaram 9:00—1501. Metal-catalyzed dehydropolymerization route to polysilanes and polystannanes. T. D. Tilley, V. Lu, S. Bukalov, L. Leites

Area 11—Special Topics in Physical Chemistry Hotel El Camino Real Del Sol Symposium on Crystal Engineering: Functional Solids by Design (516) Porous Solids

R. D. Rogers, M. J. Zaworotko, Organizers M. J. Zaworotko, Presiding 6:00—Introductory Remarks. 6:05—1502. Construction of porous organic materials by the strategy of molecular tec­ tonics. J. D. Wuest 6:35—1503. Supramolecular design of po­ rous coordination solids. O. M. Yaghi, H. Li, C. E. Davis, T. L Gray 7:05—1504. Supramolecular isomerism in dianionic salts of pyromellitic acid. M. J. Zaworotko, K. Biradha 7:35—Intermission. 7:55—1505. Predictable porous structures from preassembled trigonal topologies. S. Lee, G. B. Gardner, Y-H. Kiang, Z. Xu 8:25—1506. Crystal engineering of pyrimidine metal complexes. C. V. K. Sharma, R. D. Rogers 8:55—1507. Nanosized spherical host held together by 60 hydrogen bonds. L. R. MacGillivray, J. L. Atwood 9:25—Concluding Remarks. Hotel Krystal Krystal III Symposium on Density-Functional Theory: Recent Advances and Critical Assessment (525)

N. C. Handy, Presiding 6:00—1508. Higher derivatives using den­ sity-functional theory. M. J. Frisch, H. B. Schlegel 6:40—1509. Accurate DFT calculations of core-electron binding energies. D. P. Chong 7:20—1510. Confined many electron atoms in density-functional theory. A. Vela, J. Garza, R. Vargas 8:00—Intermission. 8:20—1511. GIAO-DFT approach to the calcu­ lation of NMR and ESR parameters: Quan­ titative results and qualitative interpreta­ tions. G. Schreckenbach, Y. Ruiz-Morales, S. K. Wolff, Y. Kahndogin, T. Ziegler 9:00—1512. Density functionals in the hydro­ gen-bonding arena. D. R. Salahub Hotel Krystal Krystal I Symposium on Stochastic Processes in Chemistry (527)

R. Kapral, Presiding 6:00—1513. Surface morphology and insta­ bilities in epitaxial growth. F. Family 6:35—1514. Pattern formation in elastic mate­ rials. T. Lookman, A. Saxena, A. R. Bish­ op, S. R. Shenoy 7:10—1515. Stochastic processes in granu­ lar materials: Avalanches and arching. R. Peralta-Fabi, V. Romero-Rochin, R. Rechtman, E. Morales-Gamboa, C. Malaga 7:45—1516. Surface growth by molecular beam heteroepitaxy: Phase segregation and elastic effects. R. C. Desai, F. Léonard 8:20—1517. Modeling and computer simulations in statistical physics and chemistry of macromolecules: Polymers, catalysis, and absorption. V. E. Tchijov, J. Keller, S. Rodriguez-Romo 8:55—1518. Computer simulation of randomly crosslinked polymers. M. Plischke Centra de Convenciones Xcaret 4 Symposium on Dynamics and Chemistry of Thin-Film Growth (531)

A. C. Jones, M. Henzler, Presiding 6:00—1519. In situ molecular beam scattering and related studies of CVD diamond growth. J. S. Foord 6:30—1520. Selective deposition and patterning of metallic thin films by MOCVD. G. S. Girolami, W. Lin, R. G. Nuzzo, N. L Jeon 7:00—1521. Doping sources for lll-N materials. C. R. Abernathy 7:30—Discussion.

7:45—1522. Contemporary CVD metallization processes for semiconductor applications. J. A. T. Norman 8:15—1523. lon-beam-assisted phase transformation in the Fe-N system. M. Behar, E. C. Moreira, L. Amaral 8:45—1524. Molecular dynamics simulation of the electrical response of a polymerdispersed liquid-crystal thin-film display. J. J. Castro, E. Yépez, A. Calles, R. M. Valladares, P., McCumber 9:15—Discussion. Hotel Krystal Krystal II Symposium on Surface and Interface Phenomena (597)

A. Robledo, Presiding 6:00—1525. New approach to fluids in disordered porous media. G. Stell, E. Kierlik, M. L. Rosinberg, G. Tarjus 6:45—1526. Random-field fluids. D. Cannel, B. Frisken, Z. Zhuang, A. Bailey, A. Casielles 7:20—Intermission. 7:35—1527. Relation between the structure, interaction, and viscoelastic properties of triblock copolymer micelles in aqueous solution. S. H. Chen, Y. C. Liu 8:20—1528. Transport of solvent and ions through ion-exchanging membranes. P. Turq, A. Lehmani, O. Bernard 8:55—1529. Dynamical and structural properties of water confined at the interface of nonionic amphiphile aggregates. F. Mallamace, D. Lombardo, N. Micali, C. Vasi

Area 12—Special Topics in Analytical Chemistry Fiesta Americana Coral Beach Coral Garden III Symposium on Analytical Chemistry in the 21st Century (589) M. A. Dosai, Presiding 6:00—Introductory Remarks. 6:05—1530. Modern mass spectrometry in analytical chemistry. H. Gomez 6:35—1531. Advanced ion trap mass spectral techniques in environmental analysis. B. C. Lynn Jr. 7:05—1532. On-line solid-phase extraction and HPLC determination for organic trace analysis in aqueous matrices. L. E. VeraAvila, M. R. Covarrubias, M. P. Padilla, J. L. Meraz, J. Reza 7:35—1533. Reactions in molecular volumes and arrays. R. L. McCarley, S. L. Caston, S. Lin, P. Moberg, J. S. Peanasky, C. Schomburg, R. J. Willicut 8:05—1534. Long-distance teaching: A challenge for analytical chemistry. I. Gomez del Rio, J. S. Durand Alegria, M. A. Garcia Mayor, M. D. Alvarez Jimenez, S. de Vicente Perez

FRIDAY MORNING Session 1 Area 01—Agrochemistry Hotel El Camino Real Camino Real IV Symposium on Functional Properties of Food Components (547)

R. Y. Yada, Presiding 9:00—Introductory Remarks. 9:05—1535. Computer-aided optimization of site-directed mutagenesis of food ingredients. S. Nakai, S. Nakamura, C. Seaman 9:35—1536. Behavior of proteins at interfaces. S. Damodaran 10:05—1537. Thermal denaturation and gelation characteristics of β-lactoglobulin ge­ netic variants. C-Y. Ma 10:35—Intermission. 10:55—1538. Production of high-protein flours to be used as milk substitutes. S. H. Guzmân-Maldonado, Ο. Parades-Lopez 11:25—1539. On the evaluation of Theologi­ cal food properties using mixing. E. BritoDe La Fuente, J. A. Nava, L. M. Lopez, L. Medina, P. A. Tanguy 11:55—1540. Computer analysis of protein functional properties. A. Rojo-Dominguez Fiesta Americana Coral Beach Coral Sea I Symposium on International Pesticide Product Registration Requirements: Similarities, Differences, and the Road to Mutual Acceptability (613)

R. Turle, Presiding 8:55—Introductory Remarks. 9:00—1541. Field trials in Latin America: Se hable GLP? S. West 9:30—1542. International multicountry field studies: GLP problems and solutions. M. M. Jensen 10:00—1543. Canadian pesticide registration system in the context of international har­ monization. D. Chaput 10:30—1544. Quality assurance for environ­ mental laboratories in Canada. R. Turle 11:00—1545. GLP and pesticide regulation in Japan. F. Ichinohe 11:30—1546. GLP national status and facili­ ties in India for pesticide product registra­ tion. B. V. David 12:00—1547. Registration in France: A chang­ ing scene. GLP accreditation: Two plays in one. D. Ambrosi, C. Touratier

Area 02—Biochemical/Medicinal/ Pharmaceutical Centra de Convenciones Xcaret 2 Symposium on Drug Targeting of Topoisomerases (509)

S. M. Kerwin, Presiding

FRIDAY MORNING Special Event 10:00 AM-noon Hotel El Camino Real Camino Real V SQM National Awards Symposium (562) 1534a. Education Award Address. M. I. A. Anaya Durand 1534b. Investigation Award Address. L. Quijano 1534c. Chemical Technology Award Address. M. Hernandez 1534d. Technical Development Award Address. E. Campos Lopez Luna

9:00—Introductory Remarks. 9:15—1548. Heat shock and topoisomerase II (gyrase) in Escherichia coli. M. C. GomezEichelmann, T. Lara-Ortiz, F. Lopez-San­ chez, J. Ramirez-Santos 10:15—1549. Kinetic analysis of the mecha­ nism of a type I topoisomerase (Topo I). J. T. Stivers, T, K. Harris, A. S. Mildvan 11:15—1550. Eukaryotic DNA topoisomer­ ase I: A mediator of DNA relaxation and structural reorganization. X. Wang, T. Arslan, K. A. Henningfeld, S. M. Hecht Centra de Convenciones Cancun 1 Symposium on Chemistry and Biochemistry of Inhibitors of Terpene Biosynthesis Prenyl Transfer Reactions and Early-Stage Sterol Biosynthesis (512)

G. D. Prestwich, Presiding 9:00—Introductory Remarks. 9:05—1551. Protein farnesyltransferase: Mechanism and inhibition. C. D. Poulter, B. C. Frey, J. M. Dolence, D. B. Rozema

SEPTEMBER 15, 1997 C&EN 6 7

FRIDAY/TECHNICAL PROGRAM

9:40—1552. Chain termination mechanism of prenyltransferase family: Insight for de­ sign of inhibitor and artificial enzyme. S-l. Ohnuma 10:15—1553. Transition-metal complexes as enantioselective catalysts for the synthesis of polyketides and terpenes. E. M. Carreira 10:50—Intermission. 11:00—1554. Molecular enzymology and func­ tion of protein isoprenylation-methylation. R. R. Rando 11:35—1555. Effects of farnesyl transferase inhibitors on protein prenylation and cellular transformation. W. R. Bishop, P. Kirschmeier 12:10—1556. Synthesis of first-generation heteroatom-containing analogs of squalene oxide and their inhibition of squalene oxidelanosterol cyclases. A. C. Oehlschlager

10:50—1570. Nickel(ll) dioxygen chemistry: Ligand oxidation and DNA modification. C. J. Burrows, R. J. Perez, J. G. Muller, C-C. Cheng, J. Gulia, R. Zabinski, S. E. Rokita 11:20—1571. Superoxide dismutase contain­ ing nickel. S-O. Kang 11:50—1572. Mechanisms of nickel transport in Helicobacter pylori: A requirement for synthesis of catalytically active urease metalloenzyme. H. L. T. Mobley, J. Fulkerson 12:30—1573. Nickel metabolism in Escherichia coli. L-F. Wu, M. A. Mandrand-Berthelot

Area 05—Education Centro de Convenciones Isla Mujeres 1 & 2 Symposium on Microscale Chemistry Experiments (501)

J. G. Ibanez, Presiding Centro de Convenciones Cozumel 5 Symposium on Peptides and Peptide Mimetics (524) New Approaches for Peptide Mimetics

M. Kahn, G. Lajoie, Presiding 9:00—1557. Synthesis, analysis, and use of azacycloalkane amino acids to mimic pep­ tide secondary structure. W. D. Lubell 9:40—1558. Anodic electrochemistry and pep­ tide mimetics: Developing a systematic ap­ proach for probing peptide-protein interac­ tions. K. D. Moeller, W. Chu, Y. Tong, Β. Long 10:20—1559. Amine oxides as powerful hydrogen-bonding control elements in peptidelike structures. I. A. O'Neil, N. D. Miller, A. J. Potter, J. M. Southern, C. D. Turner, S. B. Kalindjian 11:00—Intermission. 11:10—1560. Generation of glycine-derived radicals via a 1,5-hydrogen atom-transfer reaction: Applications to γ-lactam forma­ tion. J. Rancourt, E. Jolicoeur, V. Gorys 11:50—1561. Peptides and peptidomimetics for blocking cell adhesion receptors. H. Kessler Centro de Convenciones Cancun 3 Symposium on Combinatorial Chemistry (557)

S. Hall, Presiding 9:00—Introductory Remarks. 9:05—1562. Generation of universal librar­ ies: Are we there yet? S. Hall 9:50—1563. Synthesis and biological evalua­ tion of encoded peptidomimetic inhibitor li­ braries of aspartic acid proteases. R. E. Dolle, T. Herpin, Y. Shimshock, C. Cavallero, M. Orlowski, C. D. Carroll 10:35—1564. Combinatorial chemistry on large-bead polystyrene resins: New linkers and technologies. D. F. Veber 11:20—1565. Generation of heterocyclic com­ pound libraries via encoded combinatorial synthesis. M. A. Gallop 12:05—1566. Combinatorial chemistry of polymer-bound isocyanates. M. Scialdone Centro de Convenciones Cozumel 4 Symposium on the Role of Nickel in Biology and Catalysis (612) Environmental and Toxicological Aspects and Metabolism

9:00—Introductory Remarks. 9:10—1574. Construction and use of low-cost and effective microscale chemistry glass­ ware prepared by students. M. M. Singh, Z. Szafran, R. M. Pike 9:45—1575. Microscale chemistry at the high school level. M. Garcia-Guerrero 10:20—1576. Microscale or downsized? D. E. Berry 10:55—Intermission. 11:10—1577. Developing small-scale practi­ cal examinations for assessing cognitive laboratory skills. R. G. Silberman 11:45—1578. Microscale chemistry at UIAMexico City. A. Fregoso

G. Diaz, Presiding 9:00—1593. New developments in the photocatalytic conversion of methane to methanol. C. E. Taylor, R. P. Noceti, J. R. D'Esté 9:25—1594. Cation, stoichiometry, and additive effects in oxidation processes on hydroxyapatites. J. B. Moffat, H. Hayashi, H. Kanai, Y. Matsumura, S. Sugiyama 9:50—1595. Selective dehydrogenation of isobutane over supported Pt/Sn. R. D. Cortright, J. M. Hill, J. A. Dumesic 10:15—Intermission. 10:30—1596. Chemistry of olefins production by ZSM-5 addition to catalytic cracking units. J. S. Buchanan 10:55—1597. Recent developments in catalysts for reformulated gasolines. O. Bermudez Mendizâbal 11:20—1598. Influence of the preparative method on the activity of highly acidic WOxZr0 2 and the relative acid activity compared with zeolites. J. G. Santiesteban, J. C. Vartuli, S. Han, R. D. Bastian, C. D. Chang 11:45—1599. Mono- and bifunctional routes in carbon dioxide reforming of methane. J. H. Bitter, K. Seshan, J. A. Lercher

Centro de Convenciones Isla Mujeres 3 & 4 Symposium on Teacher Training in High School Chemistry (533)

M. V. Orna, Presiding

O. P. Strausz, Presiding

9:30—1579. ChemSource: A support system for preservice and inservice chemistry teachers. M. V. Orna, D. Gabel 10:00—1580. Interdisciplinary science course for education majors. L. L. Ramsey, D. L. Radford, W. C. Deese 10:30—1581. Developing science teacher leaders for the 21st century. D. J. Antion, S. F. Wieland 11:00—1582. Teacher/teaching enhancement through "van" projects. D. E. Jones

9:00—1600. Characterization of solid deposits from Mexican oilfields. A. Cosultchi-Marcu, C. Leon J. A. Perez-Ortiz, A. Munos-Herrera, C. Lira-Galeana 9:30—1601. Effect of light gas on heavy organic deposition of Mexican crude oils. M. A. Aquino-Olivos, J. L. Mendoza de la Cruz, A. Cosultchi-Marcu, C. Lira-Galeana 9:50—1602. Pyrolysis/gas chromatography/ mass spectrometry in the characterization of asphaltenes and their fractions. L. Montanari, M. Nali 10:20—Intermission. 10:40—1603. Characterization of asphaltenes and asphaltenic crudes by field desorption mass spectrometry. K. A. Ferworn, J. A. Nighswander, M. Rawluk, W. Y. Svrcek 11:10—1604. Settling of asphaltenes in bituminous systems. A. J. Babchin, B. Tremblay, Ε. Ε. Isaacs 11:30—1605. Interfacial activity of resins ex­ tracted from Boscan crude oil. A. Davila, R. Anton, J-L. Salager, N. F. Carnahan 12:00—1606. On the nature of inhibiting prop­ erties of petroleum dispersed systems. V. A. Martynova, F. G. Linger

Centro de Convenciones Xcaret 3 Symposium on Relevant Content for General Chemistry (540)

G. Hernandez, Presiding 9:00—Introductory Remarks. 9:10—1583. Chemistry, contents, and evalu­ ation. J. L Cordova 9:40—1584. Thermodynamics in general chemistry. J. Spencer 10:10—1585. Curriculum design for introduc­ tory environmental chemistry. N. Bunce 10:40—Intermission. 10:50—1586. Advance boldly, by stepping back 40 years. M. Laing 11:20—1587. How should we decide what topics to teach? S. J. Hawkes 11:50—Discussion. Centro de Convenciones Cozumel 1 Symposium on Hands-on Science for Children and Young Students (543)

M. J. Maroney, Presiding

R. M. Catalâ, Presiding 9:00—Introductory Remarks. 9:05—1588. New, free, science books for elementary school in Mexico. A. Sanchez 9:35—1589. Real chemistry for real elementary students. L. M. Hogue 10:05—1590. Alternative conceptions and conceptual change in chemical education. A. I. Leon 10:35—Intermission. 10:50—1591. Science-catalyzed learning for elementary children. A. M. Sarquis 11:20—1592. "Vamos a Explorar" (Let's Explore): A program for hands-on science in the classroom. C. Lapiedra, M. Y. Rosas, R. M. Catalâ

SEPTEMBER 15, 1997 C&EN

Fiesta Americana Coral Beach Coral Garden I Symposium on Environmental Catalysis (515)

Hotel El Camino Real Camino Real II Symposium on Advances in the Chemistry of Asphaltenes and Related Substances (635) Structure, Reactivity, Flocculation

9:00—1567. Environmental and toxicological aspects of nickel and its compounds. A. R. Oiler 9:40—1568. Molecular biology of nickel car­ cinogenesis. M. Costa 10:20—1569. Inhibition sites of nickel(ll) imidazolic and benzimidazolic compounds on photosynthesis. N. Barba-Behrens

68

Area 06—Energy/lndustrial/Applied/ Engineering

Fiesta Americana Coral Beach Coral Island I Symposium on Field-Portable Instrumentation for Environmental Analysis (620)

M. De La Paz Carpio, Presiding 9:00—1612. Palm-sized ion mobility spec­ trometers for chemical analyses in the field. C. S. Hardin, D. B. Schoff, D. M. Davis, R. G. Ewing 9:25—1613. High-speed and 2-D gas chro­ matography. J. Phillips 9:50—1614. High-speed gas chromatography using a solvating mobile phase: Application to field analysis. Y. Shen, N. Wu, M. Lee 10:15—Intermission. 10:30—1615. Development of a field-portable GC for analysis of volatile and semivolatile analytes. E. B. Overton, K. R. Carney, U. Ehrmann, H. P. Dharmasena 10:55—1616. Infrared spectroradiometry. R. Kroutil, R. J. Combs, R. B. Knapp, G. W. Small 11:20—1617. Analytical performance of a field-portable X-ray analyzer for in situ char­ acterization of contaminated soil and liquid hazardous waste. S. Piorek 11:45—1618. International monitoring of toxic pollutants in the New River system. M. De La Paz Carpio-Obesco, K. K. Tanji Hotel El Camino Real Del Sol Symposium on Bioremediation of NAPL-Contaminated Aquifers: Is What Is Technologically Possible Also Economically Feasible? (621)

U. Zoller, Presiding 9:00—Introductory Remarks. 9:05—1619. Remediation of NAPL-contaminated aquifers: Is the cure worth the cost? B. Kent, G. C. Bianchi-Mosquera 9:35—1620. Investigation and remediation of a DNAPL-contaminated aquifer in north­ eastern Brazil. A. D. Daus 10:05—1621. Dense nonaqueous-phase liq­ uids in situ remediation technologies: Com­ parison of cost estimates. D. Sorel 10:35—Intermission. 10:50—1622. DNAPL source zones and im­ plications for remediation. G. C. Patrick 11:20—1623. Comparison of ex situ and in situ bioremediation of unsaturated soils contaminated by petroleum. J. Wik, J. Carberry 11:50—1624. Prediction and optimization of remediation of NAPL-contaminated aqui­ fers by numerical modeling of multiphase flow and transport. C. Forkel, V. Lagendijk, J. Koengeter 12:20—Discussion. Fiesta Americana Coral Beach Coral Island II Symposium on Industrial Cleaning without Chlorofluorocarbons (627)

M. Simard-Normandin, Presiding Area 07—Environment Centro de Convenciones Tulum 2 Symposium on Atmospheric Chemistry: From Local to Global Pollution (608)

M. J. Molina, L. T. Molina, Organizers J. J. Sloan, Presiding 9:00—1607. Photochemical modeling of the Lower Fraser Valley, British Columbia. D. L. Singleton, M. Hedley, W. Jiang 9:25—1608. Atmospheric chemistry of the LGP components. M. E. Ruiz, E. Ortiz, F. Hernandez 9:50—1609. Fast, accurate sensitivity analy­ sis of large-scale atmospheric chemistry and transport models: Applications to Los Angeles, the Mexico-U.S. border, and Switz­ erland. A. Russell 10:15—1610. Air quality and atmospheric chemistry in the Mexico City Metropolitan Area. R. Lacy 10:40—1611. Design of cost-effective strate­ gies for improving air quality when there are uncertainties. G. J. McRae 11:05—Intermission. 11:20—Panel Discussion. M. J. Molina

9:00—Introductory Remarks. 9:05—1625. Chemistry of HCFC 225. G. E. Albert 9:40—1626. Solution thermodynamics con­ siderations for subcritical and supercritical cleaning and processing applications. R. Kohli 10:15—1627. Life under the NESHAP: Halogenated solvents have risen from the dead! J. Durkee, J. Baker 10:50—1628. Ozone-friendly formulations for industrial cleaning applications. A. N. Mer­ chant, K. T. Dishart 11:25—1629. Ultrasonic cleaning process and application. S. B. Awad

Area 08—Macromolecular Hotel El Camino Real Camino Real III Symposium on Compositional and Morphological Aspects of Higher Performance Catalysts and Composites (618)

R. Partch, Presiding 9:00—Introductory Remarks. 9:10—1630. Microstructural and composition­ al tailoring of silicon nitride ceramics for high toughness and strength. P. F. Bêcher, E. Y. Sun, K. B. Alexander, C. H. Hsueh, H. T. Lin

9:50—1631. Porosity engineering in sol-gelderived silica: From aerogels to molecular sieves. C. J. Brinker 10:30—1632. Synthesis, properties, and applications of advanced composites: From molecular topology to engineering. V. M. Castano 11:10—1633. Interface engineering in oxide fiber-oxide matrix composites. K. K. Chawla 11:50—1634. Advances in use of Teflon particles as lubricant additives. H. Shaub, R. Partch Hotel El Camino Real Camino Real I Symposium on Natural Polymers as Advanced Materials (626) Polymer Application and Characterization

J. M. Castro, Presiding 9:00—Introductory Remarks. 9:05—1635. Two food applications of biopolymers: Edible coatings to control microbial surface spoilage, and using chitosan to recover proteins from aqueous processing wastes. J. A. Torres 9:35—1636. Use of natural polymers as edible films in foods. J. Welti, F. Vergara, H. Mujica, A. Valdez 10:05—1637. Using 13C NMR to monitor and characterize poly(P-hydroxyalkanoates), PHAs, in vivo and in vitro. S. E. Browne, J. M. Curley, R. W. Lenz, R. C. Fuller 10:35—1638. Effect of nutrient and oxygen starvation on the kinetics of poly(P-hydroxyalkanoates) production by Pseudomonas oleovorans. J. Romero, M. F. Martinez, E. M. Vazquez, G. Guillermo 11:05—1639. Natural polymers for better bioremediation. B. R. Zaidi 11:35—1640. Polysaccharide-based plastics: Their biodégradation in laboratory studies. N. K. Arévalo, S. H. Imam, S. H. Gordon, L. J. Galân 12:05—1641. Use of natural polymer flocculating agents to control agricultural soil loss. W. J. Orts, G. M. Glenn Fiesta Americana Coral Beach Grand Coral I Symposium on Liquid-Crystalline Polymers (633)

H. Coles, Presiding 9:00—1642. Design of liquid-crystalline polymeric materials using ionic complexation. C. G. Bazuin 9:30—1643. Ordered structures of comblike copolymers obtained by hydrogen bonding between homopolymers and end-functionalized oligomers. G. ten Brinke, O. Ikkala 10:00—1644. Molecular and polymer pyridinium liquid crystals. D. Navarro-Rodriguez, E. Bravo-Grimaldo, D. Guillon 10:30—1645. Supramolecular main-chain LCPs: Hydrogen-bonded association chains. A. C. Griffin, C-M. Lee, C. He, C. D. Terrell 11:00—1646. New approach to liquidcrystalline polymers of noncovalent bonds by graft polymerization. G. Burillo, E. Bucio, M. P. Carreon, D. J. Guzman, R. Aliev 11:30—1647. Molecular, macromolecular, and supramolecular liquid crystals from nonconventional architecture. V. Percec

Area 09—Special Topics in Organic Chemistry Centro de Convenciones Tulum 3 & 4 Symposium on Biocatalysis in Organic Chemistry (502)

H. L. Holland, Presiding 9:00—Introductory Remarks. 9:10—1648. Enzymatic oxidative phenolic coupling. C. J. Sih 10:10—1649. Biocatalysis in eutectic mixtures and supersaturated substrate solutions. E. N. Vulfson 10:50—1650. Enantioselective oxidation of sulfides catalyzed by cyclohexanone monooxygenase. G. Carrea, S. Colonna, N. Gaggero, G. Ottolina, P. Pasta 11:30—1651. Epoxide hydrolases as new tools for the synthesis of enantiopure epoxides and vicinal diols. R. Furstoss

Centro de Convenciones Cozumel 3 Symposium on Supramolecular Structures: Characterization and Physical Aspects (523)

M. Garcia-Garibay, Presiding 9:00—1652. Perturbation of excited-state reactivity by covalent attachment of photoactive molecules to metal surfaces. M. A. Fox, M. Wolf, W. Li, M. Wooton 9:45—1653. Noble gases inside fullerenes: A review. M. Saunders, H. A. Jimenez-Vazquez, R. J. Cross, R. Shimshi, A. Khong 10:30—Intermission. 10:50—1654. Nanoporous organominerals. C. Detellier 11:35—1655. Supramolecular assemblies of dyes and aromatics: Relation between aggregate structure and resultant molecular assembly properties. H. Chen, C. Geiger, K. Liang, J. Perlstein, X. Song, T. Xiao, D. Whitten Centro de Convenciones Cancun 4 Symposium on Natural Products Synthesis (552)

M. Lautens, Presiding 9:00—1656. Progress toward the synthesis of physostigmine-type alkaloids. M. S. Morales-Rios, P. Joseph-Nathan 9:45—1657. New methods for construction of carbon-carbon bonds via coppers-mediated reactions. E. Piers 10:30—1658. Combinatorial synthetic design. P. A. Bartlett 11:15—1659. New methods for the synthesis of macrolides. S. D. Rychnovsky 12:00—1660. General strategies for the synthesis of bioactive molecules. S. F. Martin Centro de Convenciones Xcaret 1 Symposium on Cubanes, Homocubanes, Secocubanes, and Heterocubanes (X = P, As, N): Synthesis and Chemistry (615) Heterocubanes and Their Building Blocks

A. P. Marchand, A. J. Bennet, Presiding 9:00—Introductory Remarks. Κ. Κ. Laali 9:05—1661. Phosphorus-carbon cage com­ pounds by cyclooligomerization of phosphaalkynes. M. Regitz, T. Wettling, M. Birkel, B. Breit, R. Gôller, A Mack 9:30—1662. Building novel cations and molecules with tetraphosphacubanes, phosphaalkynes, and phosphirenes. Κ. Κ. Laali 9:55—1663. Novel cage compounds contain­ ing phosphorus derived from di- and triphosphacyclopentadienyl rings. J. F. Nixon 10:20—Intermission. 10:40—1664. Metallophosphaalkenes as synthons in organometallic chemistry. L. Weber 11:05—1665. Toward azacubanes: Synthesis of norcubanes. A. Bashir-Hashemi 11:30—1666. Theoretical studies of strained cyclic organophosphorus and organoarsenic compounds. S. M. Bachrach, B. C. D. Gailbreath 11:55—1667. Computed properties of nitrocubanes and nitroazacubanes. P. Politzer, M. E. Grice, J. J. M. Wiener 12:20—Discussion. 12:25—Concluding Remarks. Κ. Κ. Laali

Area 10—Special Topics in Inorganic Chemistry Centro de Convenciones Tulum 1 Symposium on Transition-Metal Group 13 Complexes Including the Roles in Catalytic Processes (514) Metal-Catalyzed Additions of B-X Bonds T. B. Marder,

Presiding

9:00—Introductory Remarks. 9:05—1668. Organolanthanide-mediated cat­ alytic reactions involving B-H and Si-H bonds. T. J. Marks 9:35—1669. Palladium-catalyzed asymmetric hydroboration of 1,3-enynes forming axially chiral allenylboranes. T. Hayashi

10:05—1670. Rhodium-catalyzed asymmet­ ric hydroboration of olefins using chiral ferrocenyl ligands. A. Togni 10:35—Intermission. 10:55—1671. Transition-metal-catalyzed ad­ dition and cross-coupling reactions of tetra(alkoxo)diborons. N. Miyaura 11:25—1672. Roles of M-B bonds in stoichio­ metric and catalytic transfer of B-X bonds to unsaturated substrates. M. R. Smith 11:55—1673. Metal-catalyzed diboration of imines and nitriles: Direct routes to a-aminoboronic acids. R. T. Baker, A. Appel, S. A. Westcott, T. M. Cameron Centro de Convenciones Cancun 5 Symposium on Novel Applications of Organometallic and Inorganometallic Chemistry in Materials Science (530)

K. H. Pannell, D. H. Berry, Presiding 9:00—1674. New high-yield routes to group 14 polymers. D. H. Berry, J. A. Reichl, S. M. Katz 9:30—1675. Synthesis, structure, and ringopening behavior of new [1]ferrocenylsilanes containing amido and alkoxy substituents at silicon. P. Nguyen, M. Twardowski, A. J. Lough, I. Manners 9:50—Intermission. 10:00—1676. Porosity engineering in sol-gelderived silica: From aerogels to molecular sieves. C. J. Brinker 10:30—1677. Solid-state NMR studies on trimethylsilylated natural silicates. J. Cer­ vantes, E. Rodriguez, G. Mendoza-Diaz 11:00—1678. Controlled cleavage of com­ pletely condensed silsesquioxane frame­ works. F. Feher, D. Soulivong, A. G. Eklund 11:30—1679. New homogeneous tin oxide materials. L. Sita 12:00—1680. Hybrid materials from silses­ quioxane cubes. R. M. Laine

Area 11—Special Topics in Physical Chemistry Hotel Krystal Krystal I Symposium on Stochastic Processes in Chemistry (527)

S. Rodriguez-Romo, Presiding 9:00—1681. Nonlinear effects in Brownian motion. E. Braun, M. Romero-Bastida 9:35—1682. Connection between thermody­ namic and stochastic theory of nonequilibrium chemical systems. K. L. C. Hunt, P. M. Hunt, M. Yamato, A. Hjelmfelt, J. Ross 10:10—1683. Scaling properties in randomwalk and Ornstein-Zernike systems. A. Robledo 10:45—1684. Direct simulation of noise-in­ duced kinetics in bistable bivariate sys­ tems. I. L'Heureux, S. Guillouzic 11:20—1685. Is turbulence a stochastic pro­ cess? E. G. Pina 11:55—1686. Escape rates over potential bar­ riers: Variational principles and the Hamilton-Jacobi equation. E. Cortes, F. Espinosa Centro de Convenciones Xcaret 4 Symposium on Dynamics and Chemistry of Thin-Film Growth (531)

W. L. Gladfelter, J. S. Foord, Presiding 9:00—1687. Understanding chemical vapor deposition using in situ X-ray scattering in real time during growth. D. W. Kisker, P. H. Fuoss, G. B. Stephenson, S. Brennan 9:30—1688. Growth kinetics of semiconduc­ tor quantum dots. A. Zangwill 10:00—1689. Initial growth process of ZnSe films on GaAs and Si substrates by molec­ ular beam epitaxy. M. Lopez-Lopez 10:30—Discussion. 10:45—1690. Growth and properties of insu­ lating epitaxial films. M. Henzler

11:15—1691. Comparison of photoemission oscillation and reflection high-energy elec­ tron diffraction techniques as in situ probes of growth dynamics. J. J. Zinck, M. F. Gyure, D. H. Chow 11:45—1692. Flux monitoring and control in chemical vapor deposition. T. P. Pearsall, N. Brown, N. L. Ricker, M. C. Johnson 12:15—Discussion. Hotel Krystal Krystal II Symposium on Metal Clusters and Metal-Ligand Interactions (585)

M. Castro, M. Zerner, Presiding 9:00—1693. Studies on the initial chemical events in nitrogen fixation. K. K. Stavrev, M. C. Zerner 9:30—1694. Quantum chemical studies of transition-metal-catalyzed enzyme reac­ tions. P. E. M. Siegbahn 10:00—1695. Photochemistry of transitionmetal complexes: Reassessment of the role of ligand-field and charge-transfer excita­ tions. E. J. Baerends 10:30—1696. Explanation of the enhanced photosensitivity of some tetraazamacrocyclic coordination compounds. M. FloresAlamo, A. Solano-Peralta, M. Castro, M. E. Sosa-Torres, R. Escudero 10:50—Intermission. 11:10—1697. Reactivity of metal-oxygen and other multiple metal-ligand bonds. T. K. Woo, M. Torrent, L. Deng, P. Margl, O. Gonzales, K. Monteyne, T. Ziegler 11:40—1698. DFT calculations for transitionmetal clusters and metal-ligand interac­ tions: What are the error bars? Progress with the LAP functional. D. R. Salahub 12:10—1699. Molecular dynamics study of transition and noble metal nanoclusters. I. L. Garzon, A. Posada-Amarillas Hotel Krystal Krystal III Symposium on Electrochemical Technology (599)

O. Savadogo, Y. Meas, Presiding 9:00—Introductory Remarks. 9:05—1700. Modeling of transient and steady-state behaviors for an electrolyzer working under gas lift conditions. P. Ozil, S. Mitu, M. Aurousseau 9:35—1701. New materials for electrochemi­ cal technologies. O. Savadogo 10:05—1702. Innovative technology for remov­ ing heavy-metal ions like Pb2+ and Hg2+ in ppm concentration range from wastewater via rotary electrode separator. S. W. Lin, R. M. Felix 10:35—1703. Treatment of industrial waste­ waters by electrochemical techniques. Y. Meas, Vong, R. Ortega Berges 11:05—1704. Electrochemical sensors: De­ tection of organic compounds using redoxdependent receptors. D. Smith 11:35—1705. Electrochemical mediators in the treatment of wastewaters. A. Diaz

Area 12—Special Topics in Analytical Chemistry Fiesta Americana Coral Beach Coral Garden III Symposium on Analytical Chemistry in the 21st Century (589)

A. Kaifer, Presiding 9:00—Introductory Remarks. 9:05—1706. Molecular recognition at electro­ chemical interfaces. A. E. Kaifer 9:35—1707. Electrochemical methods as al­ ternative tools for the study of different chemical processes. I. Gonzalez 10:05—1708. DNA recognition at microfabricated electrochemical chips. J. Wang 10:35—1709. Capillary electrophoresis: Trends and mistakes—what is being done to achieve a higher impact? R. RojoCallejas 11:05—1710. Chemical weapons convention from the analytical point of view. M. A. Dosal-Gomez 11:35—Concluding Remarks.

SEPTEMBER 15, 1997 C&EN 6 9

FRIDAY/TECHNICAL PROGRAM

Fiesta Americana Coral Beach Coral Garden II Symposium on Advances in Environmental Analytical Chemistry (586)

M. E. Espinosa, Presiding 9:00—1711. Porphyrins as probe molecules in the detection of gaseous pollutants: New sol-gel films containing porphyrins. C. J. Bied-Charreton, D. Delmarre 9:20—1712. Validation of a rapid solid sample extraction using the microwave-assisted process (MAP). J. M. R. Bélanger, J. R. J. Paré, R. D. Turpin, R. Singhvi 9:40—1713. Gas-phase extraction using the microwave-assisted process (MAP) for the analysis of environmental contaminants. J. M. R. Bélanger, J. R. J. Paré, R. Singhvi, R. D. Turpin 10:00—Intermission. 10:15—1714. Analysis of near-infrared spectra of aqueous solutions by multiple linear regression. D. Littlejohn, D. Lucas, L. H. Espinoza 10:35—1715. Determination of benzene- and naphthalenesulfonates in wastewaters by solid-phase extraction and HPLC. W. Giger, S. Riediker, B. Altenbach, M. J-F. Suler 10:55—1716. New waste minimization method for radiological volatile organic analysis. L Bustos, M. Cournoyer, W. Sandoval, L. Ortega, D. Quintana 11:15—1717. Filia determination of imazethapyr herbicide in water. M. Lee, T. D. Spittier, R. A. Durst, D. R. Forney 11:45—1718. New trends in environmental analytical chemistry. S. P. Cram 12:15—Discussion.

FRIDAY AFTERNOON Session 2 Poster Program 1:30-3:30 Centro de Convenciones Bacalar 1 Environment: General 1719. Simultaneous spectrophotometric determination of demetridazole and furaltadone by bivariate calibration and derivative spectrophotometry. (Sp) L. Lopez-Martinez, P. L. Lopez-de-Alba, K. Wrobel-K., K. WrobelZ., L. Flores-Lopez 1720. Spectrophotometric determination of natural indigo. (Sp) L. I. Michelini-Rodriguez, L. Lopez-Martinez, P. L. Lopezde-Alba, C. Arias-Castro 1721. Micro and macro standards of quality. (Sp) M. Lara-Villa 1722. Detection limits of three natural contaminants of peroxisomicine A1 isolated out of Karwinskia parvifolia. G. M. Molina, A. Pineyro, M. L. Salazar, N. Waksman 1723. Determination of oxidation products in edible oils by Fourier transform infrared spectroscopy. M. del C. M. Moya-Moreno, D. Mendoza-Olivares, F. de J. AmézquitaLopez 1724. Trace determination of chloro- and nitrophenols in water by one-line solidphase extraction coupled to liquid chromatography. (Sp) A. M. Nuhez-Gaytân, L. E. Vera Avila, M. R. Covarrubias Herrera 1725. Solvent extraction of Hg(ll) with co-thiocaprolactam on diluted media of hydrochloric acid. (Sp) M. E. Nunez-Gaytân, J. de Gyves Marciniak, E. Rodriguez de San Miguel 1726. Byproduct quantification in microalgal biomass using HPLC and GC techniques. (Sp) R. Olvera, E. L Rios, R. V. Canizares, M. Coria, T. N. Ponce, C. C. Rojas, F. Rangel 1727. Experimental determination of water solubility for hydrophobic substances. J. Reza, A. Trejo, L. E. Vera-Avila

1728. Evaluation of purity assessment of peroxisomicine by HPLC with a diode array detector. (Sp) M. L. Salazar, A. PiheyroLopez, N. Waksman 1729. Quantitative analysis of carbamazepine and its main metabolites by highperformance liquid chromatography. (Sp) M. L. Salazar, V. Torres 1730. Development of analytical methodology for trace metal [Fe(lll), Cu(ll), and Zn(ll)] determination in biological tissues by ICPAES. (Sp) L. J. Serrano, M. T. J. Rodriguez, J. de Gyves 1731. Mictlantecutli: An example of determination of ancient hemoglobin. E. Ortiz, R. D. Martinez, R. Vargas-Sanders 1732. Chemical behavior of a diprotic acid could be approximated with that of a monoprotic acid? An example: Oxalic acid. J. F. Pérez, A. Rojas-Hernéndez, M. E. Carbajal 1733. Analytical comparison of the nernstian slope of the systems POSAI-316 in the valuations of HF with the behavior of the conventional glass electrode in the valuations of H3PO4. J. Pérez, G. Rosales V. 1734. Oxide films (OFs) as sensors in the quantification of Fe(ll) and Fe(lll) with K 2 Cr 2 0 7 and KMn0 4 . N. R. Ramirez, A. Martinez Estrada, J. J. Pérez Saavedra 1735. Evaluations of Re, Ru, and Pd as matrix modifiers in the determination of As by ETAAS. (Sp) M. T. Rodriguez S., M. L. Ballinas C , J. de Gyves 1736. Studies of the synthesis of (D,L)-phenylgycine: Determination of the structure of one subproduct in the Strecker's synthesis of amino acids. (Sp) E. Rojas-Escudero, M. Bustos-Villanueva, M. Menes-Arzate, P. Elizalde-Galvân, F. Leon-Cedeno 1737. Correlation between mass spectrometric and anodic reactivity of perezone. (Sp) L. Velasco, F. Pérez, J. Aceves, R. Garduno, R. Miranda 1738. On-line solid-phase extraction and HPLC determination for organic trace analysis in aqueous matrixes. L. E. Vera-Avila, M. R. Covarrubias, M. P. Padilla, J. L. Meraz, J. Reza Energy/Industrial/Applied/Engineering: General 1739. Evaluation of clinoptilolite for removal of ammoniacal nitrogen produced in aquaculture by neutron activation analysis and UVVis spectrophotometry. L. Bibiano Cruz, J. L. Iturbe Garcia, B. E. Lopez Muhoz, V. Martinez-Miranda 1740. Co-oxidation study on Cu-Co/Si-AIzeolite environmental catalysts. R. DiazReal, J. Lopez-Rubio, J. Cruz-Olivares, R. Ocampo-Pieza 1741. Sulfuric acid influence on liquid-liquid extraction of Co(ll) and Zn(ll) by MIBK from NH4SCN medium. (Sp) M. Avila, J. A. Barron, A. Alatorre, R. Navarro, T. I. Saucedo 1742. Extraction studies of Cd(ll) and Ni(l) with impregnated resins containing Cyanex 272. (Sp) T. I. Saucedo, R. Navarro, M. Avila, T. Armenia 1743. Science and technology base projects in CST-12: The organic chemistry group. (Sp) M. E. Cournoyer, R. Aguino, S. M. Trujillo, D. Martinez 1744. Simulation of evaporators: Single and multiple effect. M. T. Colli Serrano, R. Cruz Salinas, A. Rios Hernandez 1745. Application of HETP models to predict mass transfer efficiency in columns filled with structured packings. R. H. Chavez, R. E. Ortega 1746. Comparison of the capacity and mass transfer efficiency in an absorption tower filled with different types of packings. R. H. Châvez, S. Zârate 1747. Nitration of 2-methylimidazole using Fe(N03)3-tonsil. (Sp) C. Pérez Gonzalez, S. Pérez Gutierrez, M. A. Zavala Sanchez, R. M. Pérez Guitiérrez, H. Salgado Zamora 1748. Future directions on the separation of gases by polymeric membranes. (Sp) J. Palacios-Alquisira Centro de Convenciones Bacalar 2 Symposium on Electrochemical Technology (599) 1749. Industrial wastewater desalting by electrodialysis. F. Castaneda, D. Beltrân, R. Ortega, Y. Meas 1750. Underpotential deposition of Cu on partially oxidized surfaces of polycrystalline Rh. (Sp) L. Salgado, Y. Meas

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1751. Oxygen reduction on Co 3 0 4 synthesized by sol-gel in 0.5 M KOH. (Sp) U. Morales, A. Campero, O. Solorza-Feria 1752. Silver-gold alloys prepared by pulseplating: Modeling of the chemical composition. (Sp) H. Sanchez 1753. Silver deposition onto vitreous carbon surface from ammonium electrolytic bath. N. Batina, M. Miranda-Hernândez, M. Palomar-Pardave, I. Gonzalez 1754. Electrochemical system based in a flowby reactor with reticular vitreous carbon electrode for lead ion removal. M. T. Oropeza, G. Carreno-Aguilera, C. Ponde de Leon, I. Gonzalez 1755. Determination of Cr(lll) and Cr(VI) in aqueous media by adsorptive differential pulse voltammetry. (Sp) J. E. Alvarez, R. Navarro 1756. Reduction of hexavalent chromium by polypyrrole deposited on different carbon substrates. (Sp) S. Gutierrez, J. G. Ibanez, U. Pâramo, J. L Bravo 1757. HPLC with electrochemical detection for the determination of fungicides Folpet, Captan, and Captafol after cloud-point preconcentration. (Sp) R. Carabias Martinez, E. Rodriguez Gonzalo, G. Garcia Jimenez, C. Pinto, J. L. Pavon, J. Hernandez 1758. Study of the rhodium deposition reaction from chloride and sulfate solutions. D. Pletcher, R. I. Urbina 1759. Photopolymerized amperometric "wired" enzyme electrodes. K. Sirkar, M. V. Pishko Physical Chemistry: General 1760. Control of homoepitaxial growth of Cu(001) by oxygen adatoms. M. Yata, H. Rouch, K. Nakamura 1761.0MVPEof AIN, GaN, and InN using organometallic group-13 azides as single-molecule precursors. W. Rogge, R. A. Fischer 1762. Adsorption sites on amorphous surfaces. W. A. Steele, L. E. Cascarini de Torre, E. J. Bottani 1763. GaN, Au, and Al 2 0 3 deposition on functionalized self-assembled monolayers (SAMs) on gold- and silver-coated substrates. C. C. Winter, J. Weiss, J. Kàshammer, P. Wohlfahrt, S. Mittler-Neher, R. A. Fischer 1764. Characterization of n-alkanoic acid selfassembled monolayers on oxidized aluminum. R. A. Fifer, R. Pesce-Rodriguez, L D. Seger, J. P. Rasimas 1765. Physical and electrochemical study of nickel modified by CSVT. M. M. Dâvila, M. P. Elizalde, F. Silva, R. Silva 1766. Electrochemical generation of hypochlorite for a large-scale uranium recovery process. W. H. Smith, T. M. Foreman 1767. Electrochemistry of solid oxygen ion conductors. J. M. Aceves 1768. Kinetics of corrosion in the interphase steel/concrete. R. G. Nava-Galve, M. G. Lôpez-Buisân 1769. Repeated use of S natural clay as catalyst in the synthesis of e-caprolactam. J. G. Penieres, A. Flores, G. Mendoza, C. Alvarez, O. Garcia, J. M. Aceves, J. Garcia 1770. Physicochemical studies in nickeldoped anionic surfactant systems. C. E. Drennan, R. J. Hughes, V. C. Reinsborough, O. O. Soriyan 1771. Thermodynamics of multilayer adsorptions at solid-liquid interfaces. F. Berger, I. Dékâny 1772. Dynamics of micelles of PEO-PPOPEO block copolymers in aqueous solution. R. Zana, B. Michels, G. Waton 1773. Microviscosity and micropolarity of micelles of surfactant oligomers in aqueous solution. R. Zana, M. In 1774. Partitioning in reverse micelles via cation-π interactions. K. K. Karukstis, C. T. Loftus, A. S. Tuan, A. A. Frazier 1775. Molecular dynamics simulations of Langmuir-Blodgett monolayers. N. C. Braier 1776. Calorimetrical study of oils, marga­ rines, and butters. C. Cruz-Hernandez, R. M. Cruz-Hernândez, F. Mijangos-Santiago 1777. Influence of surface structure and laser polarization on the chemical mechanism of surface-enhanced Raman scattering. P. Kambhampati, C. Child, M. C. Foster, A. Campion

1778. Particles confined in 2-D at the airwater interface. S. M. Setz, E. Wolert, M. Hoderle, R. Mulhaupt, R. S. Duran 1779. Fluorinated microemulsions obtained from a novel diblock amphiphile. P. Lo Nostro, S-M. Choi, S-H. Chen 1780. Atomic layering of Bi-Sr-Ca-Cu-0 superconducting films and X-ray analysis using specular reflection technique. T. Hatano, A. Ishii 1781. Othobaric liquid and vapor densities of the mixtures of tetramethylsilane and 2,2dimethylpropane up to the gas-liquid critical line. J. M. Barbarin-Castillo, I. A. McLure 1782. Physicochemical properties of gels applied to protein crystallization. A. Moreno, T. Hernândez-Pérez 1783. Poisoning of Cu electrode on C0 2 electrochemical reduction on aqueous solution. (Sp) A. Garcia-Vera, L. Carrera-Sânchez, A. Ramos-Mejia Centro de Convenciones Bacalar 3 Symposium on Supramolecular Structures: Characterization and Physical Aspects (523) 1784. Solid-state molecular motion in macrocyclic crown ethers and their complexes as studied by carbon-13 and deuterium nuclear magnetic resonance spectroscopy. G. W. Buchanan, M. Gerzain 1785. From charged corannulenes to C 60 6_ with endohedral 3He. M. Rabinovitz, A. Weitz, L. T. Scott, M. Saunders, R. C. Haddon 1786. Characterization of the highly ordered molecular arrays on the iodine-modified gold single-crystal surfaces: In situ STM study. N. Batina, M. Kunitake, T. Kimura, K. Itaya 1787. Structural and functional characterization of immobilized protein films. S. S. Saavedra, L. L. Wood, P. L. Edmiston, J. E. Lee, S. B. Mendes, D. R. Dunphy, R. T. Robertson, E. A. Gabbard 1788. Redox chemistry of homo- and heterobinuclear complexes of 6,6'-C-spirobi(cyclam) and bis(cyclam). A. McAuley, S. Subramanian 1789. Redox-switched chiroptical properties of supramolecular coordination complexes. J. W. Canary, S. Zahn 1790. Thermal stability of mexicain: DSC studies. M. C. Oliver-Salvador, M. Juarez, J. L. Munoz-Sânchez and M. Soriano-Garcia 1791. Probing the dynamics of complexation to bile salt aggregates with triplet excited states. C. Bohne, C. Ju, M. H. Kleinman, O. Rinco 1792. Porous silicon-based multilayer sensing I: Design and characterization. V. S-Y. Lin K. Motesharei, M. J. Sailor, M. R. Ghadiri 1793. Porous silicon-based multilayer sensing II: Sensing of organic and biomolecular interactions. K. Motesharei, V. S-Y. Lin, M. J. Sailor, M. R. Ghadiri 1794. 2-Substituted benzothiazoles as fluorescent acid sensors for nonaqueous media. G. Pohlers, T. Connolly, S. Current, J. C. Scaiano 1795. Self-assembly of catenanes through transition-metal coordination: Molecular magic rings. M. Fujita, F. Ibukuro, M. Aoyagi 1796. Cation exchange-pillaring, and grafting of four smectite clays: An environmental perspective. H. Drame, C. Detellier 1797. l29Xe NMR spectroscopy of Xe in pillared clays. A. Szabo, C. Detellier, J. Ripmeester 1798. Interlamellar grafting of organic moieties in magadiite and in kenyaite. M-J. Binette, L. Mercier, C. Detellier 1799. Peptide aggregation and the formation of chromophore pairs: Self-assembly of photosynthetic models. G. Jones II, V. I. Vullev 1800. Photosynthetic models based on helix bundles. G. Jones II, V. I. Vullev, E. Braswell, D. Zhu 1801. Dynamics of the micellization process of block copolymers in aqueous solutions. J. F. Holzwarth, P. Alexandridis, I. Goldmints, T. A. Hatton, M. Kositza 1802. Monolayer films from fullerene derivatives. L. Echegoyan, F. Arias, O. Dominguez

Organic Chemistry: General 1803. Reaction of A/,A/-disubstituted anilines with bentonitic clay and microwave ener­ gy. G. Penieres, J. G. Lopez, C. Alvarez, O. Garcia, G. Espinosa 1804. Anti-inflammatory activities of some de­ rivatives of the pseudoguayanolide cumanine, isolated from Ambrosia psilostachya: A structure-activity relationship. (Sp) A. L. Lastra, M. T. Ramirez Α., J. L. Villasenor, M. Martinez-Vazquez 1805. Isolation of 8-oxo-a-erythroidine from seeds of Erythrina americana. M. Martin­ ez-Vazquez, M. Soto-Hernandez, G. Espi­ nosa P. 1806. Effects of substitution on the electro­ chemical reduction of 2-anilino-1,^naph­ thoquinones in aprotic medium and in the presence of a proton donor. N. R. Macias, B. Lotina-Hennsen, M. E. Jimenez, M. M. Aguilar 1807. Synthesis of L-kynurenine derivatives. (Sp) S. Meza, J. Sandoval, D. Crich 1808. Efficient desilylation of some nucleo­ side dérivâtes with f-BuOK in DMF. (Sp) G. Negron, F. Vâsquez, G. Calderon, G. Islas, R. Gavino, R. Cruz 1809. Addition of trimethysilylcyanide to aromatic aldehydes. (Sp) I. A. Rivero, A. Ochoa, A. Gama, R. Somanathan 1810. Synthesis of 5-( O-methoxyphenoxymethyl)-2- oxyazolidinone. (Sp) I. A. Rivero, A. Ochoa 1811. 13-Membered macrocyclic pyrrolizidine alkaloids from Senecio species. (Sp) A. L Pérez-Castorena, A. Arciniegas, A. Castro, J. L. Villasenor, A. Romo de Vivar 1812. New triterpene from Parthenium argentatum and the anti-inflammatory activities of argentatines A, B, and D. (Sp) M. Pineda H., T. Ramirez Α., G. Espinosa P., M. Martinez-Vazquez 1813. Chemical manipulation of peroxisomincine A v (Sp) O. C. B. R. Ramirez, A. Gar­ cia, N. Waksman, A. Pineyro-Lopez 1814. Addition of TMSCN to aromatic alde­ hydes catalyzed by chiral lanthanide re­ agents. (Sp) I. A. Rivero, R. Somanathan 1815. Synthetic studies of 17-oxaestradiol di­ methyl ether. (Sp) D. Méndez-lturbide F. Leon-Cedeno 1816. Synthesis of 17oc-acetoxy-4-bromo4,6-pregnadiene-3,20-dione(lll). (Sp) J. M. Méndez-Stivalet, A. Jaime Novas, J. A. Ruiz Garcia, E. Bratoeff T. 1817. Baker's yeast catalyzed reductive ringopening of 5-amino-3-alkyl-4-phenylisoxazoles. (Sp) A. Navarro-Ocana, E. Bârzana, D. Lopez-Gonzâlez, M. Jimenez-Estrada, H. F. Olivo 1818. Synthesis and X-ray structure of 3, 3,6,6-tetramethyl-9-(2-nitrophenyl)-3,4,5, 6,9,10-hexahydroacridin-1,8(2H,7H)-dione. (Sp) G. Ramirez, M. Brito-Arias, F. J. Martinez, I. Padilla, E. Molins, W. Maniukiewicz 1819. Synthesis of 17p-cyano-17a-hydroxyandrost-4-ene-3-one(lll): A study of the reaction kinetics by HPLC. (Sp) M. del C. Rodriguez Montero, J. A. Ruiz Garcia, Y. Alvarez Ginarte, J. E. Rodriguez Chanfrau 1820. New synthesis of 2-phenylaminothiazoles from amidines. M. Romero, A. Aviles, A. Fuentes, C. Gonzalez 1821. Reduction of trichloromethyl compounds with sodium thiophenolate in thiophenol. M. Romero, A. Fuentes, C. Gonzalez, D. Morales 1822. Synthesis of coumarine derivatives for the determination of its possible immunoactivity. (Sp) N. Ruiz-Paredes, M. LopezMartinez, E. Rojas-Escudero, P. ElizaldeGalvân, F. Leon-Cedeno Centro de Convenciones Bacalar 4 Symposium on Biocatalysis in Organic Chemistry (502) 1823. Formation of terminally substituted chiral 2-alkanols by microbial biotransformation. H. L. Holland, J-X. Gu 1824. Reinvestigation into enzymatic acyl transfer of frans-1,2-cycloalkanediols. H. Kaga, Y. Yamauchi, K. Yokota, K. Kakuchi

1825. Immobilization of Zymomonas mobilis cells onto carriers for the production of sorbitol in supercritical fluids. B. G. Larsen, M. Peinecke, R. L. Legge 1826. Synthesis of model fatty acid desaturases. R. A. Abramovitch, J. C. Fanning, S. Jiagao 1827. Formation of chiral methionine and ethionine sulfoxides by biocatalysis. F. M. Brown, H. L. Holland Symposium on Reactive Intermediates-Mechanistic Organic (556) 1828. Photochemical source of the real isopropylchlorocarbene and tert-butylchlorocarbene. I. R. Likhotvorik, M. Robert, M. S. Platz 1829. Photoenolization of indanyl-, tetrahydronapthyl-, and benzosuberanyl-carboxaldehydes and ketones. T. J. Connolly, T. Durst, J. C. Scaiano 1830. Kinetics and mechanism of the conjugate addition of arylmercaptans to cyclohexenone. R. Meza-Gordillo, B. Gordillo 1831. 1,2-Shift of hydrogen in [1-13C]phenyl radical. A. Necula, L. T. Scott 1832. Neighboring tin effect in the oxidation of α-stannyl phenyl vinyl sulfides. R. S. Glass, Q. Guo, Y. Liu 1833. Disastereoselective reactions of chiral, nitrogen-substituted oxyallyl cations. M. A. Walters, D. J. Sponholtz Organic Chemistry: General 1834. Study of the structure, and tautomeric equilibrium of imadazolidines by 13C and 15 N NMR. A. Ariza-Castolo, A. Moncayo 1835. Deuterium isotope effects on 13C NMR chemical shifts in indoles. I. SalgadoEscobar, M. S. Morales-Rios, G. Zepeda, P. Joseph-Nathan 1836. Preparation of cyclobutenes under mild and neutral conditions. H. Juteau, Y. Gareau 1837. Terpenes, coumarins, and alkaloids from Esenbeckia litoralis. A. B. Arguilar, M. Y. Rios, G. Delgado 1838. Analysis of tullidinol and analogs in plants of the genus Karwinskia. (Sp) G. A. Benavides, N. Waksman, M. Salazar, A. Pineyro-Lopez 1839. Oxidation studies of cholic acid with 13 C NMR. (Sp) I. A. Rivero, I. Cordova 1840. Synthesis and spectral properties of 2-(o- and p-substituted-anilino)-3H,4-(pmethyl phenyl)-7- (o-, m-, and p-methylphenoxy)-1,5-benzodiazepines. E. Cortés C, M P. Sanchez B. 1841. Synthesis and spectral properties of isomeric [(10-/V-methyl) and (12-/V-methyl)]11-(o- and p-substituted-anilino)-5H-dibenzo [b,e] [7,4]-deazepines. E. Cortés, M. Martinez 1842. Synthesis of chiral 1-aryl-2-benzazepines. R. Cruz-Almanza, R. Gâmez, S. Juarez, A. Fuentes, G. Negron 1843. Formation of unsymmetrical dithioacetals: A study of the mechanism. E. Martins, J. Y. Gauthier 1844. Friedel-Crafts acylation using triphosgene. (Sp) I. A. Rivero, I. J. Delgadillo 1845. Synthesis of faguside. (Sp) I. A. Rivero, M. Meza, I. J. Delgadillo 1846. Generation of conjugated ketenes by photolysis of alkynyl-cyclohexendienones. (Sp) M. Fernandez 1847. Medicinal plant complexes: Bioactive sesquiterpenes from Roldana gentry, Psacalium radulifolia and Isotephane heterophylla (Compositae). M. I. Aguilar, A. Trejo, E. Bandala, S. Olivares, R. Figueroa, R. Bye, E. Linares, G. Delgado 1848. Correlation between the reduction potentials and Hammett's σ-constants of Λ/-(2methylpropyl)-3-phenyl-(2E)-propenamide and its derivatives. M. M. Aguilar, E. R. Ambrosio, N. R. Macias, B. Lotina-Henn­ sen, L. T. Reyes, R. R. Cetina 1849. Antimycotic spirostanol glycoside from Solarium chysotrichum SCHLDL. L. Al­ varez, C. Pérez, G. Delgado, V. Navarro, J. L. Gonzalez, M. L. Villarreal 1850. Synthesis of chiral selectors for enantiomeric separations by centrifugal partition chromatography (CPC). (Sp) L. GJ. Argumedo-Amador, E. Camacho-Frias, B. Flores-Pérez, M. Romero-Avila 1851. Chemistry with (S)-glutamic acid. L. J. Brena-Valle, R. Cruz-Almanza, R. CarreonSânchez, O. Guadarrama-Morales

1852. Prenyl-flavanones, coumarins, triterpenes, and other constitutents from Mexican Esenbeckia species (Rutaceae). A. E. Cano, M. Espinoza, J. L. Bucio, A. RuizCancino, G. Delgado 1853. Electrochemical generation in situ of sodium hypoidide and the iodoform synthesis (haloform). L. Farrera Gamboa, M. Cruz-Morales, L. A. Reyes-Chumacero 1854. Scientific research within reach of all. H. M. Santillân, B. Magana, N. R. Mercado, Y. Diaz, M. A. Castillo 1855. Molecular electronic structure calculations at the Hartree-Fock level on [Ni(racMe6[14]aneN4)](C14H704)2 and [Ni(mesoMe6[14]4,11dieneN4)](C14H604). (Sp) S. Rios Camacho, J. A. Cogordan, J. Gomez Lara 1856. Molecular interactions in a DNA-daunomycin complex. L Chacon-Garcia, J. A. Cogordan, R. Martinez Centro de Convenciones Cozumel 2 Symposium on Environmental Catalysis

(515) 1857. Reduction of NO by CO on PdOMo0 3 /Si0 2 catalysts. A. Gomez-Cortés, J. M. Arellano, G. Diaz 1858. Alkylation of biphenyl with propylene using solid-acid catalysts. J. Aquilar, A. Corma, F. V. Melo, E. Sastre 1859. On the W(20)P(X)/AI2O3 system: Characterization and catalytic activity. Y. Muhoz, J. Cruz-Reyes, M. del Valle, M. AvalosBorja, N. Bogdanchikova, S. Fuentes 1860. In situ on-line biomass monitoring of TNT bioremediation. J. Tharakan, E. Teasley Symposium on Heavy Crude Oil (549) 1861. Improved upgrading process for heavy oils and bitumens. D. S. Scott, D. Radlein, J. Piskorz, P. Majerski, T. J. W. deBruijn 1862. Catalytic activity of pentasil-type zeolites in the ethylation of toluene. (Sp) M. Suârez C , N. Elizondo V., E. Rodriguez G. 1863. Optimizing operation conditions in the ethylation of toluene on pentasil-type synthetic zeolites. (Sp) N. Elizondo V., M. Suârez C , E. Ramirez, R. Obregon, M. Montante 1864. Influence of radical inhibitor in the ethylation of toluene using pentasil-type zeolites. (Sp) N. Elizondo V., I. I. Ivanova, B. V. Romanovsky 1865. Use of Magnetic Resonance Imaging as a tool for the study of foamy oil behavior for Hamaca crude oil. J. Espidel, M. Huerta, D. B. Fisher, L. Randall, J. Goldman, K. Green 1866. Flocculation point and total polar content in oil samples through electrical conductivity measurements. H. Prieto Energy/lndustrial/Applied Engineering: General 1867. Skeletal isomerizaton of n-butenes using acidic η- and γ-alumina. S. G. Espino­ za, G. L. Diaz, R. R. Zârate, M. O. Bérmudez, J. M. A. Cortés 1868. Obtainment of hemisphericine to a pilot plant scale using an ultrafiltration process. (Sp) R. Gonzalez, R. Robles, C. Romero, G. Méndez, D. Blanco, T. Rodriguez, F. Garcia 1869. Removal of volatile organic compounds from contaminated water using air-sparged hydrocyclone stripping technology. D. Lelinski, J. D. Miller 1870. Performance evaluation of the radiostrontium-selective inorganic ion exchangers. L. Bortun, A. Bortun, A. Clearfield 1871. Novel inorganic ion exchangers for toxic metals and radionuclides separation. A. Bortun, L. Bortun, A. Clearfield 1872. Future directions on the separation of gases by polymeric mebranes. (Sp) J. Palacios-Alquisira 1873. Attractive option for sulfur reduction in commercial gasolines. A. Pérez A., G. Marroquin S., G. Betancourt R., R. Nares O., A. Moreno T. 1874. Acetaldehyde production from ethanol by immobilized whole cells in a gas-solid bioreactor. (Sp) S. Pérez-Munguia, E. Bârzana

1875. Comparisons of equations of state in describing PVT relation for pure gases and mixtures of gases. L. A. Reyes-Chumacero, L F. Moreno-Molina 1876. Hydrogen recovery from Miguel Hidalgo Refinery streams: A technical and economic analysis. (Sp) A. Salas Padron, A Cortes Reynoso, A. Olivares Fuentes, S. Chow Pangtay 1877. Cobalt chelate preparation for a fixedbed sweetening process. S. J. Palomeque, H. F. Javier, H. P. Schacht, A. E. Diaz 1878. Analysis of alternatives to reduce sulfur content in Mexican gasoline pools. (Sp) S. M. Vazquez, R. L. Mancilla, L. M. Chavez, F. Hernandez, A. Najera 1879. Improvements in hydrodesulfurization step permits to eliminate clay treatment. (Sp) O. Bermudez M., A. Garcia L., R. Lopez L, P. Vega M., S. Ramirez Α., R. Agueda R., M. Codez P., T. Beltran O. 1880. Straight-run diesel desulfurization by fermentation using Rhodococcus rhodochrous. (Sp) J. Villafaha-Rojas, G. T. Castorena-Cortes, M. G. De la Fuente-Betancourt, M. P. Bremauntz-Michavila 1881. Sizing of knockout drums. (Sp) R. Her­ nandez, R. Del Rosal, R. Abrajan, A. Es­ trada 1882. Field allocations of pipeline oils using oil fingerprints. R. J. Hwang, D. K. Baskin, S. C. Teerman 1883. Catalytic properties of MCM-41 materi­ als in isobutane-butane-butenes alkylation and 2-propanol dehydration reactions. (Sp) M. Gomez-Cisneros, G. Carrizales-Martinez, G. Sandoval-Robles, J. M. Dominguez-Esquivel 1884. Organic phase-change materials for en­ ergy conservation. D. Banu, F. Haghighat, J. Paris, D. W. Hawes, D. Feldman 1885. Efficiency of rapid fluid mixing in a square-shaped continuous system. V. Milos­ evic, R. Litvinjenko 1886. Comparison of mixing criteria in vis­ cous mixing applications. P. A. Tanguy, F. Bertrand, D. Rauline, P. Carreau 1887. Mixing in pneumatically agitated mul­ tiphase contactors. M. Moo-Young, Y. Chisti 1888. Finite element method prediction of the velocity profile in extrusion of polymers. (Sp) G. Amaya Ventura, G. Garcia Manzo 1889. Finite element simulation of electrolytic process controlled by charge transfer. (Sp) G. Amaya Ventura, Y. Castro Priego 1890. SLM indium recovery in presence of high concentrations of iron using D2EHPA as carrier. L Ballinas, J. de Gyves, E. Ro­ driguez de San Miguel 1891. Comparison between Cyanex 272 and D2EHPA for solvent extraction of Fe(lll), Pb(ll), Cd(ll), and Cu(ll) from nitrate media. L. Ballinas, E. Rodriguez de San Miguel, J. de Gyves 1892. Chlorobenzene hydrodechlorination in aqueous media employing Pd/C, Pt/C, Rh/ C, and Ru/C. (Sp) J. L Benitez, G. del Angel 1893. IMP-NSH-9704 hydrocarbon-soluble neutralizer for its use in primary and vacu­ um distillation plant development. (Sp) J. L. Benitez, R. Roldan, V. Flores 1894. Furnace prototype at low cost and high yield for the curing of green vanilla beans. (Sp) A. Cid, A. Hernandez 1895. Isolation of methyldibenzothiophenes from diesel feedstock. C. M. Cortés, Y. Figueroa, G. C. Laredo 1896. Type and distribution pattern of aromatic compounds in light gas oil and light cycle oil by LC. (Sp) C. M. Cortes, Y. Figueroa, G. C. Laredo, M. T. Mares, J. L. Cano 1897. Assembling and characterization of an instrument to determine the humidity sorption isotherms based on mixtures of dried and satured air. (Sp) L. O. Cuevas-Canales, R. Arana-Errasquin, Y. Ticante-Garcia 1898. Expanded index in biofilm fluidized bed reactor. (Sp) J. Cervantes-Ruiz, A TorresAldaco, R. S. Ruiz-Martinez 1899. Development of an automatic sequential methodology for the operation of turbo pumps. (Sp) A. Estrada, L. Silva, R. Hernandez, R. Abrajan 1900. Bisimidazolines and bisamides: Synthesis and evaluation as corrosion inhibitors. (Sp) E. Rivera, E. Ramirez, J. Eguia Lis 1901. Preparation and evaluation of thiazoline as a corrosion inhibitor in hot hydrocarbon. G. Guzman, J. C. Eguia Lis, N. A. Rodriguez

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1902. Imidazoline-type corrosion inhibitors applied for catalytic cracking and hydrocracking plants. (Sp) G. Guzman P., J. Nava A. 1903. Cation separations by polymeric membranes. J. de Gyves, E. Rodriguez de San Miguel 1904. Open-loop dynamic behavior of a reactive distillation column. A. Flores-Tlacuahuac, E. Fuentes 1905. New catalyst for FCC feedstocks and light gas oil hydrotreatment. E. Galvân, T. Beltrân, B. Medellin, M. T. Cortez, R. Zârate 1906. Influence of the oxidation state of metals deposited in FCC catalysts. R. Garcia, F. Hernandez, O. Bermudez, L. Garcia 1907. New IMP'S hydrodesulfurization catalyst surpasses expections. (Sp) O. Bermudez, R. Agueda, P. Vega, S. Ramirez, A. Garcia 1908. Generalization of composition-dependent mixing rules for multicomponent systems: Prediction of vapor-liquid and liquidliquid equilbria. F. Garcia-Sanchez 1909. Comparative activity studies in benzene alkylation reaction on zeolites. (Sp) F. Javier, P. Schachat, E. Diaz 1910. Equation of state associated with activity coefficient models for predicting lowand high-pressure vapor-liquid equilibria. O. Hernandez-Garduza 1911. Supercritical extraction of paraffinic compounds from lubricants with C0 2 . (Sp) F. Hernandez, R. Espinosa, A. Austrich, A. Salas 1912. Comparative study of Pt/Al203 and Pt/ mordenite catalysts on paraffin isomerization. (Sp) R. Luna, G. Hernandez, R. Zârate, L. Diaz, P. Schachat, O. Bermudez 1913. MTBE synthesis on solid-acid zeolitebased catalysts. (Sp) C. Marin, E. Diaz, S. Reyes, E. Rodriguez, M. Ortiz 1914. The chile—a very Mexican flavor: A phytochemical study. F. Navarro 1915. Influence of feedstock chemical nature on fluid catalytic cracking performance. F. X. Ortega, C. Cureno, A. A. Neri 1916. Technological design for whole-wheat breadmaking in a microindustry. (Sp) C. G. Duenas, A. Navarrete 1917. Technological design for making nutritive cookies in a microindustry. (Sp) C. G. Duenas, A. Navarrete, L. Tenorio, R. Rivera, T. Hernandez 1918. Preparation of LiF: Mg, Cu, P+PTFE thermoluminescent dosimeters to be used in medical applications of ionizing radiation. (Sp) P. R. Gonzalez, J. Azorin, Ramirez 1919. Naphthenic acids, sulfur compounds, and chlorides in Mexican crudes: Characterization and corrosive effects. (Sp) G. C. Laredo S., C. R. Lopez C , J. J. Castillo M., J. L. Cano D., C. Cotero 1920. Nitrogen compound identification in light gas oil and light cycle oil by GC/MS. (Sp) G. C. Laredo S., M. T. Mares G., S. Leyva T., J. L. Cano D. 1921. Production of high-quality emission diesel from Mexican crudes. (Sp) G. C. Laredo S., G. H. Moreno V., C. M. Cortes R., J. L. Cano D., G. Bazân N., L. Gonzalez C. 1922. Thermal stabilization of Ti0 2 with lanthanide and actinide materials. J. H. Mendoza, G. Hernandez, P. Schachat, E. Diaz, R. Garcia 1923. Fruit stabilization for making yogurt using guar gum. (Sp) A. L. Navarrete, C. Duenas 1924. Osmosis control in natural yogurt. (Sp) A. L. Navarrete, C. Duenas 1925. Separation of medium distillates in hydrocarbon types by flash chromatography. H. Palencia, E. Santos, Y. Figueroa, G. Laredo 1926. SLM separation of indium(lll) using LIX 984 and Cyanex 272 as carrier reagents. E. Rodriguez de San Miguel, J. de Gyves 1927. Catalytic conversion of propylene oxide on a super acid sulfonic clay (SASC) system. (Sp) M. Salmon Business and Economics Applied to Chemistry: General 1928. Proposal for regulation products employed in phytotherapy. B. Velasco, A. Obaya, R. Miranda, R. Garcia 1929. How to do business with a national laboratory: A chemist's viewpoint. M. E. Cournoyer 1930. Natural gas vs. LPG. C. Doormann 1931. New right of Canadian and Mexican inventors to prove invention in the U.S. by activities in their countries. A. Bloom

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Centro de Convenciones Cancun 2 Symposium on Relevant Content for General Chemistry (540) 1932. Changes that are needed in introductory chemistry. S. J. Hawkes 1933. General chemistry: A proposal for chemistry majors. A. Garritz-Ruiz, G. Hernândez-Millan, P. Montagut-Bosque 1934. Chemical knowledge, conceptual structures, and achievement in general chemistry. J. P. Suits, J. J. Lagowski 1935. Student opinion of general chemistry content: Effect of instructor. R. J. Christensen 1936. Student opinion of general chemistry content: Change over time. R. J. Christensen 1937. Using case studies to make the general chemistry textbook more relevant. T. A. Holme 1938. Reliability and validity of a food chemistry exam. A. Aguirre, A. Obaya Symposium on Multimedia Authorware Program (542) 1939. Software support for biochemistry teaching. L. Rivera-Fernândez-Rio 1940. Animated organic mechanisms using inexpensive presentation software. G. D. Frederick, J. Go Education: General 1941. General chemistry course based on competencies. (Sp) J. Sepulveda, P. Valdéz, J. Escobedo 1942. Independent work in chemistry teaching and learning in the Preparatoria Agricola of the Universidad Autonoma Chapingo. (Sp) A. G. Ranferi 1943. Teaching stoichiometry using chemical reactions in the classroom in a cooperative learning environment. E. C. Balocchi, M. M. Martinez, R. F. Ceron 1944. Cooperative learning in general chemistry: Use of peer team leaders. L. S. Kogut 1945. Computer program about bromatology and nutritional values in foods. (Sp) L. Aguilar-Santelises, M. Cruz-Millân, V. CorveraPillado, C. E. Roquero-Garcia, R. Mendoza-Serna, J. A. Rojas-Zamorano 1946. Chemistry importance in the curriculum of agricultural professions in the Universidad Autonoma Chapingo. (Sp) R. J. A. Anaya 1947. Use of guided reading materials in a cooperative learning setting. M. L. James, K. C. Holder, T. C. Pentecost 1948. Integration of molecular modeling into the undergraduate chemistry curriculum. N. H. Martin 1949. Importance of a course on electricity parallel to a chemistry course in the structure of the new curriculum (Sp) J. L. Aragon, J. A. Anaya 1950. High school chemistry teacher training program at the IPN-México. E. M. ArceEstrada, J. C. Reza-Garcia, E. M. ChapaReséndez, M. E. Navarro-Clemente, L. R. Ortiz-Esquivel 1951. Art of teaching science: From textbooks and test tubes to drama and dance. Ζ. Μ. Lerman 1952. Use of active teaching methods in gen­ eral chemistry to pharmaceutical sciences studies. (Sp) M. Gomez, L. A. Bello, M. Sanfeliz 1953. Expert system to help in space and time assignment for chemical curricula. E. Arce-Medina, R. Mendoza-Serna, C. E. Roquero-Garcia, M. Cruz-Millân 1954. Project development: A new subject in the curriculum for chemistry majors. C. Villar-Rubio, L Fuentes-Rubio, N. Gascon-Orta, I. Jiménez-Garcia, E. Leyva-Ramos, S. Leyva-Ramos, Y. Sandoval-Zarate, L. Valle-Aguilera, G. Zapata-Zapata 1955. Excellency in the academic preparation of a graduate in chemistry in Cuban universities. (Sp) L. Yafiez-Gonzalez 1956. Computation of energy spectrum and wave functions by sine collocation. A. Barranon Cedillo, S. Castillo Animas 1957. Basic chemistry and environmental contamination. (Sp) M. T. Castafieda Briones, J. Becerril A. 1958. Developing small-scale practical examinations for assessing cognitive laboratory skills. R. G. Silberman 1959. Withdrawn.

1960. Evaluation of cooperative learning in the chemistry laboratory. M. M. Cooper, T. S. Kerns 1961. Educational application of a network for the optimization of instrumental analysis teaching. G. Pérez-Caballero, A. RojasHernândez, P. A. Morales, S. T. Ramirez, A. F. Perez 1962. Interrelationship between molecular structure, vibrations, and reactions of compounds in the stratosphere: An ongoing project in physical chemistry lab. J. F. Caballero, D. F. Harris 1963. Integrated environmental/analytical laboratories using real samples from south Texas. D. F. Harris 1964. New educational reference material set for instructional calibration training of chemical technicians in UV-vis absorption spectrophotometry. J. D. Messman, A. C. Reeves 1965. Calibration paradigm for UV-vis absorption spectrophotometers. J. D. Messman, A. C. Reeves 1966. Basic chemistry for engineering careers. (Sp) M. T. Castaneda-Briones, R. Soto, F. Nunez, J. Becerril Α., A. Cardenas, H. Goni, M. Chavez, L. Ortiz, C. Reza, S. Delgadillo, A. Dominguez, Μ. Ε. Borrego 1967. Microcalorimetry studies of supported Ru catalysts for the reduction of nitric oxide with hydrogen. R. Gomez Enriquez, Β. Ε. Handy, M. G. Cardenas Galindo 1968. Chemistry in integrated science lecture and laboratory courses. D. L. Adams 1969. Investigation at UNAM's high school. Y. Castells Garcia, C. Avendano Zatarain, M. E. Del Rey Lefiero 1970. Development of a cooperative-learningbased laboratory sequence for non-science majors. M. D. B. Dillingham, M. M. Cooper 1971. Experiments and insruments in 19th century chemistry texts. (Sp) M. Izquierdo, M. D. L. Pérez-Garrido 1972. Concept building in electrochemistry. (Sp) M. Alvarez, S. A. Flores 1973. Stoichiometry and meaningful learning. (Sp) A. Bascunân 1974. Microscopic concept of matter. (Sp) A. Bascunân 1975. What happened to the sodium? A didactic problem related to a daily life experience. (Sp) A. Bascunân 1976. New didactic attempt to simplify and rationalize the teaching of the ion-electron method. (Sp) A. Bascunân 1977. Didactics for chemistry in high school, through inductive strategies. J. R. Barragân, S. G. Bello, J. A. Toledo 1978. Synthesis and characterization of azoic colorants. (Sp) R. L. Cornejo, Y. A. Caballero, F. Garcia, J. M. Méndez, G. Martinez, F. Jimenez, M. Cruz, R. M. Dominguez, J. Medina 1979. Construction of knowledge in chemistry. (Sp) Y. A. Caballero, G. V. Salazar 1980. Experimental teaching on microbiological corrosion. A. P. Carranco Pérez, S. C. Tejada Castaneda 1981. Distinguishing between heat and temperature. (Sp) L O. Cervantes, S. A. Flores, G. Sanchez 1982. Microscale audiovisual workshop with glass materials. (Sp) F. Caloso R., R. M. Gonzâlez-Muradâ S., P. Montagut B., R. M. Sandoval M., C. Sanson O. 1983. First impressions of senior high school teachers to a change in the study program. J. C. Romero, J. Gomez 1984. Incidence of strategic planning of the educational process in the chemistry area of the Universidad Autonoma de Chapingo. (Sp) M. E. Aguirre, H. H. Rueda, C. C. Beltrân, U. A. Gonzalez 1985. Application of questionnaires when using newpaper/magazine articles, audiovisua l , and lab experiences as valuable auxiliaries within chemistry teaching. (Sp) M. E. del Rey, C. Avendano 1986. Connotative meaning of the concept of "chemistry" in ENP students: Differences between two groups—chemical-biological area vs. social sciences area. C. Avendano Zatarain, M. Solorio Galguera

1987. Identification of environmental pollution agents by chemistry high school students. Y. Castells Garcia, C. Avendano Zatarain, A. R. Barron Ruiz 1988. Student's opinion poll about ENP's [Escuela Nacional Preparatoria, Universidad Nacional Autonoma de Mexico (UNAM)] chemistry III program. T. Flores de Labardini 1989. Clearinghouse for chemical information instructional materials (CCIIM). G. Wiggins 1990. Upward bound chemistry at Los Angeles City College: Designing a curriculum. B. E. Ruiz Silva, F. Fate, D. Mitchell, M. Estick, E. Carter, J. Rountree, R. Olvina 1991. Teaching enzyme kinetics: Illusions about enzyme-substrate and enzyme-inhibitor intermediates. W. H. Fuchsman

FRIDAY LATE AFTERNOON Session 3 Area 01—Agrochemistry Hotel El Camino Real Camino Real III Symposium on Phytochemicals and Phytopharmaceuticals (503)

L. M. Pena Rodriquez, Presiding 3:30—Introductory Remarks. 3:35—1992. Plants as medicine: The role of phytochemicals in optimal health. C. M. Hasler 3:55—1993. Curcumin, kojic acid, tangeretin, malton, carnosol, and epigallocatechin gallate modulate tumor suppressor and oncogene gene. Y-L. Saux, C. Boyd, C-T. Ho, R. Rosen, G. Ghai, K. Csiszar 4:15—1994. Diet, nutraceuticals, disease prevention, and marketplace. G. Ghai, C. Boyd, K. Y. Chen, K. Csiszar, C-T. Ho, H. Passmore, W. Tong, R. Rosen 4:35—1995. Novel neutraceuticals for health benefits. O. Y. Zheng, K. He, Y. Shao 4:55—1996. MALDI-MS analysis of potato glycoalkaloids. D. C. Abell, D. Driedger, P. Sporns 5:15—Intermission. 5:35—1997. Stop-flow kinetic study of the free-radical-scavenging action of epicatechin and related compounds in homogeneous and micellar solutions. K. Mukai, Y. Kanesaki, Y. Egawa, S. Nagaoka 5:55—1998. Serum antioxidant capacity assessed by an iron-dependent assay in carotid stenosis. T. R. Watkins, D. K. Kooyenga, M. L. Bierenbaum 6:15—1999. Intake of flavonoids and isoflavonoids from foods by Japanese. S. Watanabe, M. Uchara, H. Aldercreutz Centro de Convenciones Cozumel 5 Symposium on Chemistry of Kenaf: Properties and Materials (505)

T. A. Rymsza, Presiding 3:30—Introductory Remarks. 3:35—2000. Organosolv pulping of kenaf by the Alcell process. J. H. Lora, R. P. Sundara, S. R. Winner, E. K. Pye 3:55—2001. Properties of kenaf from various cultivars, growth, and pulping conditions. J. S. Han, E. S. Miyashita 4:15—2002. Recycling potential of kenaf fibers. H. Pande, D. N. Roy 4:35—2003. Characteristics of the kenaf bark and core fibers for pulp and paper production using soda-AQ cooking process. A. F. Kaldor 4:55—2004. Biomechanical pulping of kenaf and other agro-based materials. R. A. Young, S. Sabharwal, M. Akhtar 5:15—Intermission. 5:35—2005. Properties of kenaf-polypropylene composites. R. M. Rowell, A. Sanadi, R. Jacobson, D. Caulfield 5:55—2006. Performance of hardboards made from kenaf. J. H. Muehi, A. Krzysik, J. A. Youngquist, P. Chow, Z. Bao 6:15—2007. Properties of low-density composites made of kenaf core fiber. T. Sellers Jr.

Hotel El Camino Real Camino Real IV Symposium on Functional Properties of Food Components (547)

F. S hah id i, Presiding 3:30—Introductory Remarks. 3:35—2008. Understanding structure-func­ tion relationships in milk-clotting enzymes: A model. R. Y. Yada, T. Tanaka 4:05—2009. Functional properties of whey proteins in forming networks. E. A. Foegeding, E. A. Gwartney 4:35—2010. Industrial whey protein concen­ trates and isolates: Processes, functional­ ity, and applications. P. Jelen 5:05—Intermission. 5:25—2011. Functional properties of soy pro­ teins. N. S. Hettiarachchy, U. Kalapathy 5:55—2012. Functional properties of meat pro­ teins. M. I. Guerrero, A. Totosaus, P. Lara 6:25—2013. Effect of acylation on flax pro­ tein on functionality. F. Shahidi, P. K. J. P. D. Wanasundara Fiesta Americana Coral Beach Coral Sea I Symposium on International Pesticide Product Registration Requirements: Similarities, Differences, and the Road to Mutual Acceptability (613)

F. Liem, Presiding 3:25—Introductory Remarks. 3:30—2014. Registration procedures for agrochemicals in the European Union. J-l. Celorio 4:00—2015. GLP in the European Union: Reg­ ulations, implementation, and experiences. J. Lange, J-l. Celorio 4:30—2016. Exotoxicity and GLP: European requirements and practices. N. J. Dent 5:00—2017. GLP considerations on the road to mutual acceptability: A Swiss perspec­ tive. I. R. Wuthrich 5:30—2018. GLP deficiencies of recent ori­ gin. W. Garner 6:00—2019. Validation of complete GC and HPLC systems in analytical chemistry: Is validation of individual system components really necessary? M. Williams 6:30—2020. Verification-validation: Possibleprobable. R. Cooney

Area 02—Biochemical/Medicinal/ Pharmaceutical Centro de Convenciones Xcaret 2 Symposium on Drug Targeting of Topoisomerases (509)

S. M. Kerwin, Presiding 3:30—Introductory Remarks. 3:40—2021. Studies of the quinobenzoxazines and analogs: Molecular models for DNA binding and topoisomerase inhibition. Q. Zeng, Y. Kwok, L. H. Hurley, S. M. Kerwin 4:40—2022. "Positional poison model" for the actions of topoisomerase ll-targeted anti­ cancer drugs. P. S. Kingma, N. Osheroff 5:40—2023. Molecular and cellular interac­ tions of camptothecins and DNA topo­ isomerase I (top 1). Y. Pommier Centro de Convenciones Cancun 1 Symposium on Chemistry and Biochemistry of Inhibitors of Terpene Biosynthesis Prenyl Transfer Reactions and Early-Stage Sterol Biosynthesis (512)

A. C. Oehlschlager, Presiding 3:30—2024. Second half of the oxidosqualene cyclase problem. J. H. Griffin 4:05—2025. Triterpene synthases. S. T. P. Matsuda, J. B. Reyna, L. A. Darr, L. Hua, M. A. Lovato, Ε. A. Hart 4:40—2026. Inhibitors of squalene synthetase and the control of cholesterol synthesis. H. J. Harwood Jr., S. F. Petras, S. Lindsey, L. D. Pellarin 5:10—Intermission.

5:25—2027. Active-site probes for proteins that bind isoprenoids. G. D. Prestwich, I. Abe, D. M. Marecak, Y. F. Zheng, H-K. Lee, T. Dang 6:00—2028. Squalene epoxidase inhibitors in the control of cholesterol biosynthesis. S. Halazy, J. P. Gotteland, D. Junquero, P. Oms, A. Delhon 6:30—2029. Oxidosqualene cyclase inhibi­ tors: A novel class of lipid-lowering agents. M. Mark, B. Eisele, P. Muller, R. Maier Centro de Convenciones Cancun 3 Symposium on Combinatorial Chemistry (557)

Ν. Η. Sigal, Presiding 3:30—Introductory Remarks. 3:35—2030. New screening paradigms for the exploration of molecular and genetic diver­ sity. N. H. Sigal 4:15—2031. Screening of large libraries cre­ ated via bead-based encoded combinato­ rial synthesis. R. W. Barrett 4:55—2032. New directions in the synthesis of small-molecule libraries. M. D. Shair 5:35—2033. Yeast-based technologies for as­ say development and drug discovery. J. I. Paul, C. Klein, J. Trueheart, A. J. Murphy, J. Manfredi, L. Silverman, D. R. Webb, J. R. Broach 6:20—2034. Fluorescent sensors of intracel­ lular signal transduction: Applications to pharmaceutical screening. R. Y. Tsien, A. B. Cubitt, J. E. Gonzalez, R. Heim, J. Llopis, A. Miyawaki, G. Zlokarnik Centro de Convenciones Cozumel 4 Symposium on the Role of Nickel in Biology and Catalysis (612) Ureases and C^ Biochemistry

G. Voordouw, Presiding 3:30—2035. Urease activation and mecha­ nism. R. P. Hausinger, G. J. Colpas, K. Yamaguchi, L. O. Michel, R. A. Schaller 4:15—2036. In vitro activation of recombinant Helicobacter pylori apo-urease and blocking of activation by chemical modification or site-directed mutagenesis. G. Soman, W. Thomas Jr., T. P. Monath, S. K. Ackerman 4:45—2037. Role of nickel in methanogenesis from acetate. J. G. Ferry 5:30—2038. Snapshots through the reaction pathway of methyl-coenzyme M reductase from methanogenic Archaea. R. K. Thauer 6:00—2039. Synthetic and mechanistic mod­ els for CO dehydrogenase and methyl co­ enzyme M reductase. C. G. Riordan 6:30—2040. Role of nickel in CO oxidation and acetyl-CoA synthesis. S. W. Ragsdale, J. Seravalli, M. Kumar, S. Arendsen 7:00—2041. Structure and function of the nickel and iron-sulfur centers in carbon monoxide dehydrogenase. P. A. Lindahl, D. P. Barondeau, J. Xia, W. K. Russell, D. M. Fraser, Β. Ε. Wilson, E. L. Maynard

Centro de Convenciones Cozumel 1 Symposium on Hands-On Science for Children and Young Students (543)

A. M. Sarquis, Presiding 3:30—Introductory Remarks. 3:35—2049. Science teaching strategies for concept construction in the new chemistry curricula for high school in Mexico. A. Ramirez 4:05—2050. Chemistry ambassadors en­ gage elementary and high school students in industrial chemistry. M. S. Sabo, A. M. Sarquis 4:35—2051. Show and tell to teach and com­ municate chemistry problems. J. Valdés 5:05—Intermission. 5:20—2052. Teaching science with toys: Activities for the middle school classroom. J. L. Sarquis 5:50—2053. New chemistry program for middle school: Three years of experience. J. A. Chamizo, A. Sanchez 6:20—2054. Experimental chemistry in the middle school classroom. M. E. Colsa, C. Lapiedra, R. M. Catalâ, R. Camba

6:50—Discussion. Centro de Convenciones Xcaret 3 Workshop on Cooperative Learning (548)

A. Rugarcia, Presiding 3:30—2055. Promoting skill development with cooperative learning. A. Rugarcia, R. M. Felder, R. Brent

Area 06—Energy/Industrial/Applied/ Engineering Fiesta Americana Coral Beach Coral Garden I Symposium on Environmental Catalysis (515)

J. G. Santiesteban, Presiding

Area 05—Education

3:30—2056. Plenary Lecture. Catalytic fixation of C0 2 : C0 2 purity and H2 supply. J. N. Armor 4:15—2057. Regenerable solid sorbents for SOx and H2S removal from tailgas: The Mobil Oil SOx treatment process (MOST). D. L. Stern, K. E. Nariman, J. S. Buchanan, N. A. Bhore, D. L. Johnson 4:40—2058. Structure and potential role of atmospheric nanoparticles in photocatalytic and thermal production of atmospheric pollutants. M. J. Yacamân, R. R. Chianelli 5:05—Intermission. 5:20—2059. Zeolites as agents for advanced pollution control. J. W. Bryne, M. Deeba 5:45—2060. Mechanistic investigations of NO reduction by CH4 over ZSM-5 exchanged with transition-metal cations. A. T. Bell 6:10—2061. Pd on acidic supports as selective catalysts for NO reduction by methane. D. E. Resasco, A. Ali 6:35—2062. Structural and catalytic properties of Pd-Al 2 0 3 catalysts. S. Fuentes, N. Bodganchikova, G. Diaz, M. Avalos, M. H. Farias

Centro de Convenciones Isla Mujeres 3 & 4 Symposium on Integrated Laboratories (507)

Hotel El Camino Real Camino Real V Symposium on Heavy Crude Oil (549)

A. J. Fry, Presiding

J. G. Reynolds, C. Song, Presiding

3:30—2042. Integrated laboratories: Intro­ duction and overview. A. J. Fry 3:45—2043. Advanced integrated laboratory course for chemistry majors. J. W. Bruno 4:15—2044. Thirty years of a unified laborato­ ry program at Ithaca College. H. F. Koch 4:45—2045. "Superlab": Twenty-nine years of an upper-level integrated laboratory course. C. F. MacKay 5:15—2046. Unified laboratory program. A. Obaya 5:45—2047. Integrated laboratories in the general and organic discovery curriculum at Holy Cross: General principles. R. S. Herrick, R. M. Jarret, P. D. McMaster, R. W. Ricci 6:15—2048. Integrated laboratories in the gen­ eral and organic discovery curriculum at Holy Cross: Specific experiments. R. M. Jarret, R. S. Herrick, P. D. McMaster, R. W. Ricci

3:30—Introductory Remarks. 3:35—2063. Heavy crude oil at PEMEX refining process. A. L. Santa Ana 4:15—2064. Understanding resid cracking through molecular feed characterization. B. A. Lerner, F. L. Himpsl 4:45—2065. Comparison of feed analysis and FCC-catalyst testing methods using Isthmus gas oil, Maya gas oil, and Maya residuum. R. G. McClung, R. Alwarez, F. Hernandez, A. Sweezey, P. Gamero 5:15—Intermission. 5:55—2066. Molecular changes in the sulfur compounds during hydrocracking of Athabasca bitumen. O. P. Strausz, E. M. Lown, T. W. Mojelsky 6:25—2067. Slurry-phase hydroconversion of heavy feedstocks: A novel approach. N. Panariti, A. Del Bianco, G. Garuti, S. Rosi

6:55—2068. New catalytic steam conversion technology for residues upgrading. P. Pereira-Almao, R. Marzin, L. Zacarias, J. Cordova, M. Marino, G. Thompson, M. McGrath 7:25—2069. Evaluation of catalysts based on nonstable heteronuclear hydroxides for heavy oil conversion. M. N. Kopylovich, A. K. Baev, A. A. Chernik Fiesta Americana Coral Beach Coral Island I Symposium on Advanced Coating Processes in Manufacturing (559) See on-site program for papers. Hotel El Camino Real Camino Real II Symposium on Advances in the Chemistry of Asphaltenes and Related Substances: Structure, Reactivity, and Flocculation (635)

N. Camahan, O. Mullins, Presiding 3:30—2070. Asphalts and asphaltenes: Molecular structure, flow, and precipitation. M. Sahimi 4:00—2071. Flocculation onset titration of asphaltenes: Fundamentals and applications. S. I. Andersen 4:30—2072. Phase diagrams of asphaltenes: Experimental technique, results, and modeling of some North Sea crude oils. P. Fotland, H. Anfinsen, H. Foerdedal, H. P. Hjermstad 5:00—Intermission. 5:20—2073. Asphaltene micellization in model solvent systems and precipitation reversibility and inhibition in crude oil systems. R. S. Mohamed, W. Loh, A. C. Ramos 5:50—2074. Flocculation of low asphaltenic crudes. M. B. Manek 6:20—2075. Onset of asphaltene precipitation: Relationship between microscopic observations and refractive index measurements. J. S. Buckley

Area 07—Environment Fiesta Americana Coral Beach Coral Island I Symposium on Field-Portable Instrumentation for Environmental Analysis (620)

E. W. Sarver, Presiding 3:30—2076. Rapid screening methods to isolate and identify proliferation-related compounds using solid-phase microextraction technology. A. Alcaraz, S. S. Hulsey, B. D. Andresen 4:00—2077. Analysis of highly toxic materials in the field. D. J. Reutter, C. E. Henry, M. J. Heyl, J. E. Brzezinski 4:30—2078. MS-MS on-site screening techniques for chemical weapons convention. E. W. Sarver, D. K. Rohrbaugh 5:00—Intermission. 5:15—2079. Sample preparation and GC-MS analysis in support of the chemical weapons convention. M. Rautio 5:45—2080. Field identification of munitions by neutron interrogation. A. J. Caffrey, A. E. Egger, J. K. Hartwell, K. M. Krebs, G. D. McLaughlin 6:15—2081. Ruggedized capillary electrophoresis system with UV and conductivity detection for field environmental analysis. W. R. Jones, D. W. Hanna, S. Willhoite Hotel El Camino Real Del Sol Symposium on Bioremediation of NAPL-Contaminated Aquifers: Is What Is Technologically Possible Also Economically Feasible? (621)

S. Lesage, Presiding 3:30—2082. Field test of NAPL remediation by alcohol flooding. R. W. Falta, C. M. Lee, S. E. Brame 4:00—2083. Demonstration of surfactant flooding of an alluvial aquifer contaminated with DNAPL. G. A. Pope, C. L. Brown, M. Delshad, D. C. McKinney, W. H. Wade, V. Dwarakanath, R. E. Jackson, J. T. Londergan, H. W. Meinardus, T. Oolman 4:30—2084. Evaluation of a surfactant-alcohol mixture for in situ NAPL solubilization as a single-phase microemulsion. M. D. Annable, J. W. Jawitz, P. S. C. Rao, D. Rhue

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5:00—Intermission. 5:15—2085. Surfactant-enhanced remediation of mixed NAPL wastes: Solubilization vs. mobilization. R. C. Knox, D. A. Sabatini, B. Shiau, J. H. Harwell 5:45—2086. Processes and concepts for optimizing the economics of surfactantenhanced remediation. J. H. Harwell, D. A. Sabatini, R. C. Knox, b. Shiau 6:15—2087. Feasibility of NAPL-contaminated aquifer bioremediation by biodegradable nutrient-surfactant mix. U. Zoller, H. Rubin 6:45—Discussion. Centro de Convenciones Press Room Symposium on Oxygenated Fuels and Urban Air Quality in the Americas (623)

V. D. Adams, Presiding 3:30—2088. Analytical methodology for determination of methanol and ethanol in air using field cryosampling and HPLC-ECD. M. L. Botelho, S. T. Oliva, T. M. Tavares 4:10—2089. High-temperature ozone chemiluminescent detection of oxygenates: Potential gas chromatographic detection of methyl-tert-butylether (MTBE). N. A. Marley, J. S. Gaffney 4:50—2090. Impact of California phase 2 RFG on light-duty vehicle emissions. A. W. Gertler, J. C. Sagebiel, W. A. Dippel, C. M. O'Connor 5:30—Intermission. 5:45—2091. Potential air-quality effects of ethanol-gasoline fuel use: A field study in urban and rural New Mexico. R. S. Martin, C. J. Popp, L. G. Reyes, R. W. Dixon, J. S. Gaffney, N. A. Marley 6:25—2092. Ambient concentrations of MTBE and ethanol: A one-year study in Porto Alegre, Brazil. D. Grosjean, E. Grosjean, R. A. Rasmussen

Area 08—-Macromolecular Hotel El Camino Real Camino Real I Symposium on Polymers from Acetylenic Compounds (528)

S. K. Tripathy, Presiding 3:30—2093. Structure and chromism in poly(diacetylenes). J. B. Lando, J. A. Mann Jr. 4:05—2094. Preparation and characterization of ladder-structured polydiacetylenes. H. Nakanishi 4:40—2095. Crystal structure-linear spectroscopy relationship for polydiacetylenes and related topics. D. J. Sandman 5:15—2096. Synthesis of some novel diynes for use in display devices. G. H. W. Milburn, J. Wright, R. Chalkley 5:50—2097. Synthesis and chromic behavior of new diacetylene-functionalized multiphase segmented copolymers. M. E. Rubner, K. Zemach 6:25—2098. Oxidative coupling polymerization of terminal bisacetylenes. S. Hernandez, S. Fomine, T. Ogawa Fiesta Americana Coral Beach Coral Garden III Symposium on Characterization of Catalytic Materials: Connection Between Measured Properties and Catalytic Behavior Microscopic Characterization (606) G. L. Haller, Presiding 3:30—2099. Characterization of nanoscaled metals using high-resolution TEM and computer simulations. M. J. Yacamén, J. A. Ascencio, M. E. Espinosa-Pesqueira, C. Guitiérrez-Wing, M. Marin-Almazo 4:15—2100. Characterization of sulfide catalysts by high-resolution transmission electron microscopy. S. Fuentes, M. AvalosBorja 4:45—2101. Electron microscopy for catalyst characterization in the DOE2000 Materials Microcharacterization Collaborator. L. F. Allard, E. Voelkl 5:30—2102. HRTEM characterization of silicaincorporated CuO catalysts prepared by solgel. G. Diaz, M. Benaissa

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Fiesta Americana Coral Beach Grand Coral I Symposium on Polymers at Surfaces (634)

Centro de Convenciones Cancun 4 Symposium on Organometallic Transformations in Synthesis (555)

J. Schultz, J. Koberstein, Presiding

L. S. Liebeskind, N. A. Petasis, H. Alper, C. Alvarez-Toledano, E. Pena-Cabrera, Organizers E. Pena-Cabrera, Presiding

3:30—2103. Formation of 2-D soap-froth and cluster structures by PS latex particles. J. R. Garcia-Ruiz, R. Gâmez-Corrales, B. I. Ivlev 4:10—2104. Direct measurements of interaction forces between polymer and surfactant in water. S. Giasson, T. Abraham 4:50—2105. Fluorescence studies of polymer interfaces. M. A. Winnik, A. Yekta, O. Tcherkasskaya, S. Ni, L. Li, J. Feng, L. Chen 5:30—2106. Interpenetrating networks of polyphosphates and thermoplastics. F. Galembeck, E. Fatima de Souza 6:10—2107. Polymer aggregation at the mesoscale: Polymorphism in fibril formation. M. F. Paige, M. C. Goh 6:50—2108. Effect of interfacial slip on viscoelastic adhesion. M. Chaudury

Area 09—Special Topics in Organic Chemistry Centro de Convenciones Tulum 3 & 4 Symposium on Biocatalysis in Organic Chemistry (502)

J. B. Jones, Presiding 3:30—2109. Procreators of c/'s-cyclohexadiene diols and other motley products. D. T. Gibson 4:30—2110. Current state of indigo production from glucose in E. coli: In situ biodégradation of isatin, a by-product in the process. W. Weyler, G. Whited, D. Wendt 5:10—2111. Phylogeny and the biotransformation capabilities of microorganisms. W. R. Abraham 5:50—2112. Recent advances in the application of the concept of reversible anchor/ protecting groups in biohydroxylation. H. Griengl Centro de Convenciones Xcaret 1 Symposium on Moving Toward the Second Century of Carbocation Chemistry (517)

G. K. Surya Prakash, J. Tamariz, Presiding • 3:30—2113. Advances in the chemistry of a-carbonyl, α-thiocarbonyl, and a-oximino carbocations. X. Creary, C. Zhu, Z. Jiang 4:10—2114. oc-Heteroatom-substituted carbenium ions. H. Grutzmacher, G. S. Chen, C. Marchand, R. Glaser, C. Widauer, G. Frenking 4:50—2115. How do reaction mechanisms change? Specific- and general-acid cataly­ sis of cleavage of benzaldehyde acetals and the lifetimes of α-alkoxy benzyl carbo­ cation intermediates. J. P. Richard, V. Jagannadham, Κ. Β. Williams 5:35—2116. Intrinsic properties of carbocat­ ions based on gas-phase ion-molecule equilibrium. M. Mishima 6:15—2117. H/D exchange studies between small alkanes and liquid superacids. J. Sommer, J. Bukala, M. Hachoumy, R. Jost Centro de Convenciones Cozumel 3 Symposium on Molecular Modeling and Theoretical Chemistry (551)

J. J. Gajewski, Presiding 3:30—2118. Transition states of epoxidations: Models for stereoselectivity. Κ. Ν. Houk, J. Liu, T. Strassner 4:20—2119. Origin of 13C NMR chemical shifts. K. B. Wiberg, J. Hammer, J. Cheeseman, K. Zilm 5:10—2120. Site-specificity of oxidative dam­ age in proteins. D. Yu, A. Rauk, J. Taylor, G. V. Shustov, D. A. Block, D. A. Arm­ strong 6:00—2121. Carbohydrates, peptides, and glycopeptides: A prelude to ab initio struc­ tural biology and ab initio drug design. I. G. Csizmadia, P. Csaszar, G. I. Csonka, K. Elias, G. Endredi, O. Farkas, M. A. McAllister, A. Perczel, S. J. Salpietro, C. P. Sosa, Z. Szekely, L. L. Torday

3:30—2122. Molecular mechanics predic­ tions and experimental testing of asym­ metric palladium-catalyzed allylation reac­ tions using new chiral phenanthroline ligands. E. Pena-Cabrera, P-O. Norrby, M. Sjogren, A. Vitagliano, V. De Felice, J. Oslob, S. Ishii, D. O'Neill, B. Akermark, P. Helquist 4:10—2123. Heterodienyl ligands in organo­ metallic compounds. M. A. Paz-Sandoval 4:50—2124. Trends in samarium iodide chem­ istry: The intermolecular reduction coupling of α,β-unsaturated ketones. A. Cabrera 5:30—2125. Z-3-Methylene-2-ferrocenylmethylenequinuclidine in cyclodimerization and dimerization reactions. E. I. Klimova, L. Ruiz, M. Martinez 5:50—2126. Transition-metal-mediated exoselective and enantioselective Diels-Alder reactions. M. E. Welker, J. J. Chapman, B. M. Richardson 6:10—2127. Transition-metal-centered C-C coupling of isonithles and acetylenes. D. Rehder, D. Rodewald, C. Collazo, C. Bôttcher Centro de Convenciones Isla Mujeres 1 & 2 Symposium on Reactive Intermediates-Mechanistic Organic (556)

M. S. Platz, L. Johnson, Presiding 3:30—2128. Study of the reaction of β-aminoalcohols with 1,2-diketones. N. FarfânGarcia 3:55—2129. Synthesis and kinetic studies of the epimerization of five- and six-membered ring c/s-phosphites. G. B. Gordillo 4:20—2130. Elucidating DNA damage processes involving radical intermediates. M. M. Greenberg 4:45—2131. Nucleophilic attack at carbonyl groups. C. M. Hadad, H. M Sulzbach, Μ. Τ Gordon, Β. Τ. Frink 5:10—2132. 1,4-Dihydrodioxins: Masked orfho-quinones as photochemically activat­ ed DNA cleaving agents. K. A. Schnapp, A. Faulkner, C. McFadden, N. Jackson, A. Harsch, R. M. Wilson, K. Bendinskas, R. Midden 5:35—2133. Iminopropadienones, RN=C= C=C=0. C. Wentrup 6:00—2134. Pericyclic routes to reactive in­ termediates. R. P. Johnson, A. Z. Brad­ ley, R. C. Burrell, K. J. Daoust 6:25—2135. Photocatalytic degradation of chlorophenols over Cr 2 0 3 -Ti0 2 . E. Leyva, E. Moctezuma, E. Monreal, R. Guajardo

Area 10—Special Topics in Inorganic Chemistry Centro de Convenciones Tulum 1 & 2 Symposium on Transition-Metal Group 13 Complexes Including Their Roles in Catalytic Processes (514)

R. T. Baker, Presiding 3:30—Introductory Remarks. 3:35—2136. Preparation and reactions of C1-bridged phosphaboranes. M. Srebnik 4:05—2137. Routes from catalytic hydrometallation into organic synthesis. J. M. Brown, M. W. Hooper, E. Fernandez, H. Doucet 4:35—2138. Dinuclear μ-diborylcarbene com­ plexes: Derivatives of planar methane. W. Siebert, A. Gunale, D. Steiner, D. Schweikart, I. Hyla-Kryspin, H. Pritzkow, A. Berndt, R. Gleiter 5:05—Intermission. 5:25—2139. Group 4 metallocene-boron-betaine chemistry. W. Ahlers, B. Temme, J. Karl, R. Frôhlich, G. Erker

5:55—2140. Metal-catalyzed hydrometallations for the control of regio- and enantioselectivity. M. Lautens 6:25—2141. Reactivity of highly electrophilic boranes with early metal organometallics. W. Piers, Y. Sun, R. E. Spence, G. P. Yap, M. Parvez, S. J. Rettig Centro de Convenciones Cancun 5 Symposium on Novel Applications of Organometallic and Inorganometallic Chemistry in Materials Science: Novel Polymers (530)

R. M. Laine, I. Manners, Presiding 3:30—2142. Thermoplastic hybrid materials from polyhedral oligomeric silsesquioxane (POSS) reagents. J. Lichtenhan, T. Haddad, J. J. Schwab 4:00—2143. Organometallic-templated syntheses of zeolites and related materials. K. J. Balkus Jr., A. Ramsaran, M. Biscotto, J. Shi 4:20—2144. Processing and properties of a poly(methylsilsesquioxane)-polyacetylene hybrid by titanocene-cataiyzed redistribution of tetramethylcyclotetrasiloxane and in situ acetylene polymerization. J. F. Harrod, L. Hao, T. Grasczyk 5:00—Intermission. 5:30—2145. Preceramic routes to novel ceramics. R. Riedel 6:00—2146. Carbosilane dendrimers: Molecules with many possibilities. D. Seyferth, S. Krska, R. Wyrwa, B. lungwitz, M. Kropfgans, T. Sugimoto 6:30—2147. Polymers with linear gold(l) or diplatinum(l) centers in the backbone. R. Puddephatt, M. J. Irvin 7:00—2148. Metallocenes in mesoporous silicates: Novel materials and catalysts. D. O'Hare, J. Tudor, S. O'Brien Hotel Krystal Krystal I Symposium on Materials Chemistry (596)

R. Gomez, Presiding 3:30—Introductory Remarks. 3:35—2149. History of sol-gel catalytic materials. T. Lopez 4:05—2150. Sol-gel preparation of supported metal catalysts. R. D. Gonzalez, C. K. Lambert 4:35—2151. Synthesis and crystallography of nanostructured oxides. X. Bokhimi 5:05—2152. TGA/FTIR studies of the deactivation of sulfated zirconia catalysts. R. D. Gonzalez, B. Li 5:35—2153. Lithium insertion reactions of different phases of the Nb 2 0 5 -W0 3 binary system. A. F. Fuentes, L. M. Torres-Martinez 6:05—2154. Study of superconductor-insulator transition in ceramic materials. E. Chavira 6:35—2155. Initial permeability and impedance spectroscopy: Complementary characterization techniques on polycrystalline ferrites. M. P. Gutierrez, R. Valenzuela

Area 11—Special Topics in Physical Chemistry Hotel Krystal Krystal III Symposium on Density-Functional Theory: Recent Advances and Critical Assessment (525)

J. P. Perdew, Presiding 3:30—2156. Why Dirac was wrong and how Schroedinger covered it up. P. M. W. Gill 4:10—2157. Determining functionals from ab initio data. N. C. Handy, D. J. Tozer 4:50—2158. General properties of density functionals. J. A. Pople 5:30—Intermission. 5:50—2159. Density-functional theory: Qualitative and quantitative. R. G. Parr 6:30—2160. Chemical reactions: The hardness and softness viewpoint. J. L. Gazquez

Hotel Krystal Krystal II Symposium on Metal Clusters and Metal-Ligand Interactions (585)

W. C. Lineberger, M. D. Morse, Presiding 3:30—2161. Energetics of the reactions of tran­ sition-metal cluster ions. P. B. Armentrout 4:00—2162. Calculation of accurate metalligand bond energies. C. Bauschlicher Jr., H. Partridge, A. Ricca 4:30—2163. Trends in gas-phase metal clus­ ter reactivity with hydrocarbons: Modeling systems without significant cluster size or structure. R. D. Lafleur, D. B. Pedersen, J. M. Parnis, D. M. Rayner 5:00—2164. Nonadditive forces in atomic clusters: The case of silver. R. Santamaria, I. L. Garzon, I. G. Kaplan, O. Novaro 5:20—Intermission. 5:30—2165. Ligand binding energies in multimetal complexes: Transition-metal carbonyl cluster anions. K. Ervin 6:00—2166. Theoretical studies on reactivi­ ties of metal clusters and cluster complex­ es. K. Morokuma, Q. Cui, S. Dapprich, D. G. Musaev 6:30—2167. Size-dependence in metal clus­ ter reaction kinetics: The classic case of Nbn + H2 revisited. S. A. Mitchell, S. Ander­ son, A. Berces, L. Lian, D. M. Rayner Centro de Convenciones Tulum 2 Symposium on Time Propagation Methods in Chemistry (622)

S. D. Schwartz, Presiding 3:30—2168. Semiclassical initial value repre­ sentation for electronically nonadiabatic dynamics. W. H. Miller 4:10—2169. Multiple timescale intramolecu­ lar dynamics. R. E. Wyatt 4:50—2170. Spectra of transition-state ox­ ides from solutions of the time-dependent Schroedinger equation. T. Carrington, B. Cromp, C. Reber 5:30—Intermission. 5:40—2171. Correction of potential energy surface using inverse perturbation via sin­ gular value decompositon. J. Ζ. Η. Zhang, Q. Wu 6:20—2172. Wave packet propagation and quantum sensitivity to initial conditions. R. Dumont

FRIDAY EVENING Session 4

Poster Program 7:00-9:00 PM Centro de Convenciones Bacalar 1 Symposium on Microscale Chemistry Experiments (501) 2173. Discovery learning using microscale techniques on coordination chemistry. (Sp) M. Meijueiro, M. Rodriguez 2174. Adapting traditional laboratory experi­ ments to a microscale system. (Sp) R. Diaz-Martin 2175. Experimental proposal from a constructivist conception in microscale. (Sp) E. Nieto C , M. Carrillo C. 2176. Microscale oxidation-reduction. (Sp) M. Carrillo-Châvez, R. Gonzâlez-Muradas, A. Chaidez 2177. Microscale techniques for the high school level. (Sp) M. R. Armenta-Ortiz, A. Montes-Diaz, M. Tejeda-Gutiérrez 2178. Water treatment experiments in microand semimicroscale for environmental chemistry and engineering students. (Sp) M. Hernandez-Esparza 2179. Is it possible to dye fabrics in microscale? (Sp) R. M. Mainero

2180. Thermal energy storage: A microscale experimental demonstration. (Sp) M. Gomez-Alvarez, J. G. Ibânez 2181. Teaching protein crystallization in capillary tubes by the gel acupuncture technique. A. Moreno, V. M. Bolanos-Garcia, M. Soriano-Garcia Education: General 2182. Computer program to support the teaching of chemical species nomenclature. (Sp) M. Cruz-Millén, C. E. Roquero-Garcia, R. Mendoza-Serna, L. Aguilar-Santelises 2183. Physics in pharmaceutical education. A. O. Olvera, S. Reyes 2184. Analysis of the questions of organic chemistry used in the Iberoamerican Chemistry Olympiads. E. Cervera Flores, G. Pérez Cendejas, F. Leon Cedeno, J. M. Mendez Stivalet 2185. Complete set of approximate pH equations that can be applied in the aqueous dissolution of a diprotic acid of initial molar concentration C0. J. F. Pérez, A. RojasHernândez, M. E. Carbajal 2186. Comparative study of three generations in the personality profiles of first-year students entering school of chemistry. (Sp) F. D. Quintero, A. E. Garcia 2187. Variance structural analysis of the academic yield in an educational program in UNAM, Mexico. (Sp) P. Rius de la Pola, L. Valiente-Banuet 2188. Faculty assessment in the school of chemistry: National Autonomous University, Mexico. (Sp) P. Rius de la Pola, R. Morales Cuento 2189. Context in chemical education. C. A. Rueda 2190. Proposals of innovation of educational practice worked with group. R. Ruiz Mendoza, M. G. Carballo Balvanera, J. L. Gonzalez Chavez 2191. Preparation of pyridines using the Hantzsch synthesis. (Sp) F. Leon-Cedeho, G. Salazar-Vela, M. Soto-Hernândez, J. M. Juârez-Ruiz 2192. Study of the catalytic effect power of sulfuric and hydrochloric acids in an hydroxyalkylation reaction. (Sp) G. SalazarVela, M. Soto-Hernândez, E. Santos 2193. Centenary of the discovery of polonium and radium. J. M. Juarez Calderon 2194. Problems in solving physical chemistry problems. J. M. Juarez Calderon 2195. Structures and names software. (Sp) M. E. Maya-Yescas, J. A. Haro-Castellanos, S. E. Ledesma-Vazquez, A. Romero-Martinez, G. James-Molina 2196. Analytical method validation software. (Sp) M. E. Maya-Yescas, J. A. Haro-Castellanos, S. E. Ledesma-Vâzquez, A. Romero-Martinez, G. James-Molina 2197. Computer program to express the composition of a chemical mixture. (Sp) R. Mendoza-Serna, C. E. Roquero-Garcia, M. Cruz-Millan 2198. Some heuristic methods used for teaching at the National Polytechnical Institute. (Sp) M. de las M. Molina Α., R. Hernandez M., M. de la L. A. Valderrâbano Α., C. E. Ramirez L., Âvila G. 2199. Development of thinking skills in the teaching of problem solving for meaningful learning. (Sp) L. R. Ortiz E., J. L. Cordova-F., H. Luna P., M. de la Luz Valderrâbano Α., Ε. Ramirez L. 2200. Linking biological science with profes­ sional practice. (Sp) M. G. Osuna, A. Hurtado 2201. Actualization course for science teach­ ers. (Sp) P. P. Margarita, C. Z. Pablo 2202. Comics: A didactic device in teaching chemistry. (Sp) A. Ramirez, F. Leon, H. Murillo 2203. Microscale flame analysis. (Sp) M. S. Aguayo 2204. Proton NMR-shielding model for the face of a phenyl ring. N. H. Martin, N. W. Allen III, L. Vo 2205. Model construction of fullerenes and de­ rivatives and spreadsheet calculation of vi­ brational normal modes. (Sp) J. A. Guevara-Garcia, R. Carreon-Sânchez, A. PérezBen itez 2206. Microscale or downsized? D. E. Berry 2207. How to communicate science. (Sp) A. Borsese 2208. Microscale chemistry at UIA-Mexico City. A. Fregoso

2209. Microscale audiovisual workshop with glass materials. R. M. Gonzalez-Muradas, P. Montagut B., R. Sandoval M., C. O. Sanson, F. Caloso R. 2210. Agrochemistry: Flocculation-deflocculation, a pH effect and greenhouse effect. L. B. Reyes 2211. Analysis of water for industrial use. G. Castaneda 2212. Science on wheels: An integrated precollege outreach program. R. Camacho, W. de Jesus, W. Nazario, Y. Munoz, J. L. Garriga 2213. Operation chemistry program in Puerto Rico. N. L. Monserrate, M. del C. Gomez, J. B. Lora-Geronimo, M. E. Maldonado 2214. Operation chemistry workshops. M. E. Maldonado, N. L. Nonserrate, J. Serrano, G. Franqui, L. Santos, I. Santaliz, A. Guzman-Cruz 2215. Operation chemistry summer camp. J. B. Lora-Geronimo, M. E. Maldonado, M. del C. Gomez, G. Franqui, L. Santos, I. Santaliz, A. Guzmân-Cruz 2216. Dialysis at the microscale level. V. Cervantes-Nemer 2217. Microscale techniques for the removal of heavy metals in contaminated soils. M. C. Doria, R. Jimenez 2218. Demonstration of the efficiency of wastewater disinfection by chemical agents using microscale techniques. M. C. Doria, R. Jimenez 2219. Microscale chemistry at the high school level. M. Garcia-Guerrero 2220. Recycled chemical culture. C. Hernandez Cristina, G. B. L. Edith, G. C. Arcelia 2221. Energy. (Sp) de Ita C. M. Angel 2222. Water, ham, milk, tortillas, and vitamins. Ν. Ε. Diaz Centro de Convenciones Bacalar 2 Symposium on Materials Chemistry (596) 2223. SnS thin-film modification in fluorine and oxygen atmospheres. J. Elizalde-Torres, M. T. S. Nair, P. K. Nair, J. M. Saniger 2224. Characterization of the corrosion prod­ ucts formed on Zn and Zn alloy electrodeposits exposed to a humid tropical climate. (Sp) P. Quintana R. Ramanauskas, M. A. Pech-Canul, L. Maldonado 2225. Thermal dilatation coefficient measure­ ments of aluminum thin film. P. Quintana, A. L. Oliva, M. Aguilar, E. Corona, O. Ceh, M. J. Rodriquez 2226. Infrared study of magnetite dispersed in a polymeric matrix. M. F. Mata-Zamora, J. M. Saniger 2227. Calcium substitution in B 14 Ti 3 0 12 sys­ tem. (Sp) S. De La Parra, A. Buanosta, E. Chavira, L. Banos 2228. Calorimetric study of mixed oxides zirconia-alumina. T. Lopez, M. Asomoza, S. Solis, M. May 2229. Spectroscopic characterization of Zr0 2 Si0 2 and sulfated-derived gel materials. T. Lopez, R. Gomez, J. L. Boldu, E. Munoz, O. Novaro 2230. Synthesis and characterization of solgel irradiated silica. T. Lopez, R. Gomez, E. Adem, J. L. Boldu, E. Munoz, O. Novaro 2231. Colored-glass preparation at low tem­ perature without silica. (Sp) M. Meijueiro M., M. Chavez M. 2232. Electron microscopy studies of lead titanate ceramics obtained by sol-gel pro­ cess. R. M. Lima, S. S. Sevilla, R. Her­ nandez, V. Castano 2233. Synthesis of iron zircon pigments. E. Carreto, C. Pina, V. Castano 2234. Synthesis of ZnCr 2 0 4 spinel pigment and Rietveld refinement of the structure. A. L. Fernandez, L. de Pablo 2235. Crystalline structure refinement in the synthesis of materials. A. Garcia-Ruiz, X. Bokhimi, A. Morales 2236. Κ and Na adsorption in shale. (Sp) R. Monsalvo, L. de Pablo, M. L. Chavez, C. Avilés, M. G. Miranda 2237. Stability of shale in Ca and Mg solutions. (Sp) M. G. Miranda, L. de Pablo, M. L. Châvez, C. Avilés, R. Monsalvo 2238. Tetragonal nanophase stabilization in sol-gel zirconia. X. Bokhimi, A. Morales, O. Novaro, M. Portilla, T. Lopez, F. Tzompantzi, R. Gomez

2239. Electrical and magnetic properties of the (Ca, Sr)1_xRExCu02+s system: RE = Nd, Gd, and Dy. G. Tavizon, R. Escudero 2240. Electrical and magnetic properties of the Nd186Ce0.-|4CuO4 system under several reductive media. J. Feuchtwanger, G. Tavizon 2241. Fluorination of Pr 2 Cu0 4 and its physical properties. F. Romero, G. Tavizon, J. P. Bemal, J. O. Flores, J. M. Saniger 2242. System Li3Ta04-NiO. Vega G., M. A. Castellanos 2243. Clay minerals identification in Yucatan, Mexico: Possibilities of application. (Sp) M. A. Castellanos, B. Gomez, P. Quintana, J. L. Pefia, W. Cahuich, A. R. Cuaik, J. Rodriguez Symposium on Dynamics and Chemistry of Thin-Film Growth (531) 2244. Low-thermal budget processing for incorporation of monolayer concentrations of nitrogen and minimization of interfacial transition regions at silicon-silicon dioxide interfaces. G. Lucovsky 2245. Heteroepitaxy of dissimilar materials: Characterization of MBE-grown Mn-based binary compounds on GaAs. A. H. Bensaoula, L-C. Chen, D. A. Caldwell, C. J. Palmstram 2246. Epitaxial regrowth of GaAs through solid-phase interfacial decomposition reactions of NixGaAs with As, Ga, and AI. D. A. Caldwell, A. H. Bensaoula, C. J. Palmstrom 2247. Approach of interface bond-angle tailoring for dissimilar materials epitaxial growth. L-C. Chen, D. A. Caldwell, A. H. Bensaoula, C. J. Palmstrom 2248. Real-time monitoring of surface reactions chemistry during heteroepitaxial growth on Si (001) by P-polarized reflectance. N. Dietz 2249. Real-time monitoring and analysis of nucleation and coalescence of heteroepitaxial thin films under conditions of chemical vapor deposition. M. Fang, S. LeSure, K. Bachmann 2250. New method for the synthesis of ceramic thin films: Cracked-polymer vapor deposition. M. Scarlete, N. Schmitt 2251. Self-assembling structures during Ostwald ripening growth. M. Zinke-Allmang, T. Lookman 2252. Semiconducting thin films of CuxMySz (M = Bi, Sb) formed by annealing MySzCuS thin-film stacks. M. T. S. Nair, Y. Pefia, O. L. Arenas, V. M. Garcia, P. K. Nair 2253. CuxS thin films by chemical bath deposition technique. M. T. S. Nair, L. Guerrero, Y. Pena, V. M. Garcia, P. K. Nair 2254. Electrohydrodynamical deposition of thin films by spray pyrolysis and investigation of the electronic processes occurring at the interface. D. Vasilevski 2255. Thermodynamic approach to crackedpolymer vapor deposition (CP-VD). M. Scarlete, N. Schmitt Symposium on Metal Cluster and Metal Ligand Interactions (585) 2256. Role of entrance-channel effects in neutral transition-metal cluster chemistry. D. B. Pedersen, J. M. Parnis, D. M. Rayner 2257. Negative ion photoelectron spectroscopy of metal cluster monoxides. S. M. E. Green, D. G. Leopold 2258. Investigation of V3 and V 3 + from a density-functional study: Ground-state structure determinations and PFI-ZEKE spectrum simulation. P. Calaminici, A. M. Kôster, N. Russo, D. R. Salahub 2259. Photochemistry of carbonyl sulfide adsorbed on silver clusters. L. A. Brown, D. M. Rayner 2260. Reaction of a Cr atom with H2, N2, 0 2 , and NO: A density-functional study. A. Martinez 2261. Synthesis and characterization of (DPF) 4 Rh 2 C=CC 6 H 5 , where DPF is diphenylformamidinate. B. Han, S. Huang, J. L. Bear, K. M. Kadish

SEPTEMBER 15, 1997 C&EN 7 5

FRIDAY/SATURDAY/TECHNICAL PROGRAM

Centro de Convenciones Bacalar 3 Symposium on Molecular Modeling and Theoretical Chemistry (551) 2262. Quantum Monte Carlo calculations of the structure and energetics of carbon clus­ ters. J. B. Anderson 2263. Modeling cyclopentene-fused PAH com­ pounds and products derived from groundand excited-state reactions. B. R. Plummer, L. K. Steffen, D. Goodman 2264. Computer simulation of the ring-puck­ ering and oxygen-wagging dynamics in the S0 and T-i electronic states of cyclobutanone. D. C. Moule, W. Fraessdorf, C. Munoz-Caro, A Nino 2265. Theoretical study of the thio-ene reac­ tion. S. M. Bachrach, S. Jiang 2266. Substituent effects in 6-π cyclizations of 2-vinyl phenyl cumulenes. W. R. Dolbier Jr., M. D. Bartberger 2267. Optimization and characterization of transition structures. R. A. Poirier, J. D. Xidos, C. C. Pye 2268. Small barriers for forming three-membered rings: An ab initio study. S. Gronert, M. Friedman, K. Nguyen, T. Hall, J. Jamerson, K. Azizian 2269. Two experimental challenges to theo­ ry: Hydrogen-bond symmetry in solution and steric hindrance to ionic solvation. C. L. Perrin 2270. Low-barrier-hydrogen bonds: An ab ini­ tio and DFT investigation. M. A. McAllister, A. Ganeshkumar, Y. Pan, J. Smallwood 2271. Dissociative model of water. L. R. Corrales 2272. Structure and dynamics of nucleic acid base pairs: Ab initio quantum chemical and empirical potential calculations. P. Hobza, J. Sponer 2273. Amino acid conformations in nonaque­ ous media: An ab initio study. T. J. Venanzi, C. A. Venanzi 2274. Computational design, synthesis, and antihelmintic activity studies of 4-(fl)-ethylphenylcarbamates. E. Moreno, R. Martin­ ez, P. Martinez, C. Minero, K. Pacheco, R. Castillo, E. Angeles 2275. Ab initio conformational analysis of captopril fragments. L. L. Torday, P. Csaszar, G. I. Csonka, O. Farkas, A. Perczel, Z. Szekely, R. Brooks, J. G. Papp, I. G. Csizmadia 2276. Can B0 2 , C0 2 , and N0 2 + exist in bent and cyclic forms? L. L. Torday, P. Csas­ zar, G. I. Csonka, O. Farkas, A. Perczel, R. Brooks, A. K. Fuezery, B. Penke, I. G. Csizmadia 2277. CH-stretching overtone spectra and in­ ternal methyl rotation in 2,6-difluorotoluene. C. Zhu, H. G. Kjaergaard, B. R. Henry 2278. Phase equilibria of alkane mixtures: A Gibbs ensemble Monte Carlo study. M. G. Martin, J. I. Siepmann 2279. Quantum Monte Carlo simulations of mass effects on the glass transition. D. J. Lacks 2280. Role of complexes in carbene cycload­ ditions. A. E. Keating, M. A. GarciaGaribay, K. N. Houk 2281. Steric parameters corrected for bond length difference. M. Charton, B. Charton 2282. Theoretical studies of the mechanism of the Wittig olefination reaction. F. Mari, A. Restropo-Cossio, H. Cario, C. Gonzalez 2283. Experimental and theoretical studies on the electrocyclizations of 2Z,7£)-divinylallenes. A. R. de Lera, J. G. Rey, D. Hrovat, S. Lopez, B. Eglesias, A. Torrado 2284. Addition of bromine to benzobicylooctadiene: A modeling study. W. B. Smith Symposium on Organic SynthesisNatural Products Synthesis (552) 2285. Synthesis of phenylhydrazines from bis(2,2,2-trichloroethyl)azodicarboxylates and electron-rich arènes. C. Dufresne, Y. Leblanc, C. Berthelette, C. McCooeye

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2286. Novel intramolecular Diels-Alder reactions of dienophilic ortfro-quinonoid species directed toward the efficient synthesis of Viridin and congeners. R. Carlini, R. Rodrigo 2287. Synthesis of Ocimin, a naturally occurring 1,5-diene by Ti(0)-and Ti(ll)-mediated coupling. (Sp) M. Gaxiola, G. Rodriquez, V. Ratnasamy, Somanathan, M. Parra-Hake 2288. Synthesis of 1,3-bis aryl triazenes as potential precursors for mono-, di-, and trianionic thazenide ligands. G. Rodriquez V., M. Parra-Hake, P. J. Walsh 2289. Role of fine solids in the coking of vacuum residues. K. Tanabe, M. R. Gray 2290. Synthesis and in vitro cytotoxicity of cryptophycins and related analogs. J-F. Lavallée, J-M. de Muys, R. Rej, D. Nguyen, B. Go, S. Fortin 2291. Thiopyran route to polypropionates. D. E. Ward, C. Guo, C. C. Man 2292. General synthesis of methylenebis(phosphonate) analogs of diphosphates of biological interest: NAD, FAD, ADP-ribose, CDP-DAG, and CDP-ethanolamine. K. W. Pankiewicz, K. Lesiak 2293. General and facile synthesis of 1,3diaryl-4-pyrazoleacetic acids. D. Xu, K. Prasad, O. Repic, T. J. Blacklock 2294. Expedient synthesis of yingzhao peroxides. J. Boukouvalas, M. Trudeau, Y. Frechette, R. Pouliot 2295. Toward the total synthesis of plakortones. J. Boukouvalas, G. Fortier, Y-K. Cheng, P. Suter 2296. Resolution of meso/D,i_ stereoisomeric diols through phosphorus heterocycles. Z. J. Dominquez, B. Gordillo 2297. Influence of electronic effects on the stereochemistry of the oxidation of arylthiophosphates. M. Salas, J. Hernandez, B. Gordillo 2298. Diastereoselectivity in the tandem formation of thiofuranose derivatives. E. Juârez-Loera, B. Gordillo 2299. Approach to the total synthesis of kempane diterpenes. D. J. Burnell, C. Liu 2300. Electrophilic aromatic substitution catalyzed by bentonite earth. (Sp) M. Santos, B. Zârate, B. Villaneda, E. Moreno, E. Angeles, R. Martinez 2301. Alkylating agents: New chlorambucilamide and cyclophosphamide sugar derivatives. (Sp) J. M. Vega, J. I. Candela, I. Romero, F. Iglesias, F. Alcudia 2302. Asymmetric synthesis of sulfoxides and phosphine oxides. (Sp) F. Alcudia, N. Khiar, I. Fernandez, A. Alcudia, A. Benabra 2303. Synthesis, stereochemistry, and pharmacological properties of some 4,4-disubstituted 1 -(2-ethoxyethyl)-3-methylpiperidines. V. K. Yu, K. D. Praliev Centro de Convenciones Bacalar 4 Environment: General 2304. NO reduction by C2H6 over Pd/a-AI203. (Sp) A. M. Pisanu, C. E. Gigola 2305. Improvement of the aerobic degradation of wastewaters by previous ozonation. F. J. Benitez, J. Beltran-Heredia, J. L. Acero 2306. Development of sampling and analytical methods for concerted determination of commonly used organochlorine herbicides in hand wash, dermal patch, and air samples. S. P. Tucker, J. M. Reynolds, D. C. Wickman, C. J. Hines, J. B. Perkins 2307. Behavior of the DBS-Na precipitation found on wastewaters considering the detergent's inherent additives. J. Alvarez, L. Rosas, L. M. Mayorga, H. Sosa 2308. Gas-phase determination of aldehydes, hydrogen peroxide, and acids at three sites in Mexico City. (Sp) G. L. A. Andraca, L. G. Ruiz-Suârez, G. Montera 2309. Influence of chemical reactions on apparent dry deposition velocities. E. C. McDonald-Buller, H. M. Liljestrand 2310. Nitrogen dioxide heterogeneous-phase chemistry in polluted atmospheres. (Sp) M. Muriel, R. M. Ceron 2311. Inferential predictions of boiler emissions using neural networks. E. Arce-Medina, R. Mendoza-Serna, M. Cruz-Millan, C. E. Roquero-Garcia 2312. Potential air-quality effects of ethanolgasoline fuel use: A field study in urban and rural New Mexico. R. S. Martin, C. J. Popp, L. G. Reyes, R. W. Dixon, J. S. Gaffney, N. A. Marley

2313. Evaluation of a method for the head space analysis in gasoline. A. D. Cervantes, R. Ordunez, M. E. Vega, V. Mugica 2314. Optimization of MTBE content and reduction of emissions from gasoline combustion in the metropolitan area of Mexico City. I. Schifter, E. D. Gamas, M. Vera, L. Diaz, G. Bazan 2315. Determination of polycyclic aromatic hydrocarbons associated to airborne particles in several sites in Mexico City. (Sp) G. L. Andraca, O. Amador-Munoz, L. G. RuizSuarez, R. Villalobos-Pietrini, S. GomezArroyo 2316. Chemical characterization of experimental particulate atmospheres for inhalation studies. D. Bérubé, P. Kumarathasan, R. Vincent, M. Potvin, J. Guénette 2317. Selective catalytic reduction of NOx over novel ZSM-5-based catalysts with enhanced stability. M. D. Famos, J. P. McWilliams, D. S. Shihabi 2318. Clearing the air: One library's response to indoor air pollution. S. S. Chadwick, M. H. Kay 2319. Model validation of a wastewater treatment plant. E. Arce-Medina 2320. Electrochemical treatment of industrial wastewater and drainage water. S. Koetzner, T. Engelhardt, U. Nickel, H. Weib, M. S. Terrazas 2321. Aluminum speciation in drinking water treatment/distribution networks. D. Bérubé, D. Brûlé, Dabeka, A. Santagati 2322. Electrochemical behavior and decomposition of 2,4,6-trinitroresorcinol in industrial wastewater. T. Engelhardt, S. Koetzner, U. Nickel, H. Weib, M. S. Terrazas 2323. Design of a facultative and compact organic wastewater system. (Sp) E. Arias, D. Aguilar, A. Chilpa, E. Salgado 2324. Diagnosis and minimization of the chemical wastes generated by the Food Technology Academy of the University of Sonora. (Sp) C. R. Alvarez, M. A. Valencia, M. E. Arce 2325. Determination of the emission factors and inventory of the regulated compounds of exhaust and evaporative emissions from motor vehicles using LP gas in the metropolitan area of Mexico City. M. Castillo, L. Diaz, F. Ramos, C. Medina 2326. Application of synthetic strategy to green chemical process development. W. C. Hollinsed 2327. Phytomass separation into fiber and high-value chemical products using separation technologies. J. Gravitis, G. Pauli, N. Vedernikov, J. Zandersons, A. Kokorevics 2328. Electrochemical restoration of heavymetal-contaminated soils. J. M. Aceves 2329. X-ray applications in the mineral fraction study of atmospheric particles in the Laguna Verde area, Veracruz, Mexico. (Sp) M. A. Castellanos, I. Alcalde S., B. Gomez L, S. Salazar L., A. Tejeda 2330. Corrosion evaluation as a consequence of the resulting emissions of the petroleum activities in Tabasco state (Sp) D. Arroyo, L. Garcia, G. Quirarte 2331. Experimental courses in organic chemistry: Toward optimization and zero discharge of wastes. I. C. Gavilân, J. G. Avila, N. R. Lopez, E. Santos 2332. Statistic analysis for treatment methods of wastes. I. C. Gavilân, Ε. Santos, Ν. R. Lopez, S. M. Costa 2333. Lead determination in whole blood by atomic absorption with graphite furnace. G. Espejel, L. Saldivar, D. Namihira 2334. Study of the efficiency of the destruction of sharp objects with the devices available in the market. S. D. Diaz, I. C. Gavilân, V. Garcia, E. Santos 2335. Trace-level determination of methidathion in drinking water samples by using liquid chromatography and two solid-phase preconcentration methods. (Sp) M. P. Garcia de Llasera, M. E. Hernandez Rojas, M. C. Durân de Bazua 2336. Study of different ways of treating wastes containing zinc and copper in organic synthesis reactions. E. Santos, I. C. Gavilân, N. R. Lopez, S. M. Costa

2337. Comparative study of the quality of the kinds of potable water available for human use. R. Hernandez, N. Hernandez 2338. Computer simulation of volatile organic compounds (VOCs) dispersion in urban smogs generated under high traffic pollution. G. D. Zurita, J. Garcia Α., F. Montoya R., C. Angeles G., G. Anita G., O. I. Figueroa de la R., M. Martinez S., G. Rodriguez F. Centro de Convenciones Cozumel 2 Symposium on Functional Properties of Food Components (547) 2339. Rheological investigation of gellan gum gelation kinetics. (Sp) G. Martin-Cruz, A. Tecante 2340. Purification and characterization of cys­ tine lyase in broccoli. E. C. Ramirez, J. R. Whitaker 2341. Amino acid sequence of a Bowman-Birk inhibitor from tepary bean (Phaseolus acutifolius) seeds. J. Campos, J. R. Whitaker, T. T. Yip, T. W. Hutchens, A. Blanco-Labra 2342. Amino acid chemisorption by philosilicate clays. G. Camarena, J. M. Dominguez, C. M. Flores, J. Diaz De Leon 2343. Characterization of macromolecular in­ teraction in egg white proteins by laser light scattering. Y. Mine Symposium on Peptides and Peptide Mimetics (524) 2344. Physicochemical analysis of the lipidbinding domain of CETP demonstrated the existence of a previously nondescribed amphipathic α-helix. (Sp) V. M. BolanosGarcia, M. Soriano-Garcia, J. Mas-Oliva 2345. Functionalized cyclodextrins as peptidomimetics: Glycosamino-glycan sulfate bind­ ing, neurite growth, and inhibition. G. R. J. Thatcher 2346. 2',6'-Dimethylp