NEW PRODUCTS
Fraction collector can collect as many as 120 fractions using any size container or test tube. The unit allows for collection by time, number of drops, fraction volume, or external signal. Wa ters Chromatography Division of Millipore 201
Instrumentation Nucleic acids. Nucleobond AX 2000 cartridges are designed for the lowpressure liquid chromatographic iso lation of large quantities of nucleic acids. Recoveries range from 85% to 100% with no cross-contamination of DNA with RNA. The Nest Group 202 Chromatography. QuantaSep 2000, designed for the automation of large-scale chromatography, includes h a r d w a r e a n d software for lowp r e s s u r e s e p a r a t i o n s in columns ranging from 200 mL to 20 L. The system accommodates isocratic or gradient programming. Sepragen Corp. 203 Sample handling. Biomatrix sam ple processing system uses 96 dispos able tips to transfer liquid samples from tube racks to microtitration plates, specialty plates, or other tube racks. Throughput is up to 200 plates or racks per hour. Jouan 204 Titration. Model CHG-310 sample changer for automatic titration anal ysis accommodates either 12 or 18 samples using standard beaker sizes. The unit, which includes predefined sampling sequences, can also be pro grammed for nonstandard titration sequences. Kyoto Electronics Manu facturing USA 205
Microtome. Microm 350 microtome, designed for biomedical, clinical, and industrial applications, features mo torized cutting and maintenance-free roller bearing guideways. The unit is suitable for sectioning foams, foils, and emulsions, and for semithick sec tioning at 0.25 μιη. Carl Zeiss 206
gram and microgram quantities of large- a n d medium-sized biomolecules. Columns are available for reversed-phase, ion-exchange, gel fil t r a t i o n , affinity, a n d hydrophobic interaction chromatography. Phar macia LKB Biotechnology 212
Nucleic acids. SE 1600 Poker Face II nucleic acid sequencer accommodates gel sizes of 33 χ 41 cm and 20 χ 41 cm. An electrically isolated aluminum plate in contact with the gel sandwich allows for even heat distribution over the entire surface of the gel. Hoefer Scientific Instruments 207
Software
D N A . Gene S c a n n e r f l u o r e s c e n t fragment analyzer is an automated system for the analysis of DNA frag ments. Results can be displayed as a four-color, digitized gel; as individual sample electrophoretograms; or in tabular form showing fragment size, dye labeling, and fluorescence peak area and height. Applied Biosystems 208 Chromatography. PeakTrak is an on-line peak detector/autozero mod ule t h a t connects to any HPLC, GC, IC, or SFC system. Outputs are pro vided for operating a fraction collec tor, valve, or other device in response to the appearance of peaks at the de tector. Axxiom Chromatography 209 Nitrogen/sulfur d e t e c t i o n . Model 7000VSA nitrogen/sulfur analyzer is an automated system for total nitro gen and/or sulfur analyses of solid samples weighing up to 500 mg. The system includes a temperatureprogrammable inlet furnace a n d a 20-position solids autosampler. Antek Instruments 210 C e n t r i f u g e s . GS-6 series tabletop a n d kneewell centrifuges feature speeds up to 6400 rpm, sample capac ity up to 3 L with a swinging bucket rotor, and operating temperatures to - 1 0 °C for r e f r i g e r a t e d s y s t e m s . Beckman Instruments 211 LC. Smart system is an integrated LC system for the isolation of nano
424 A · ANALYTICAL CHEMISTRY, VOL. 63, NO. 7, APRIL 1, 1991
P e r i o d i c table. Periodic Plus is a comprehensive database containing detailed information on the chemical, thermodynamic, a n d spectroscopic properties of t h e elements. Histo g r a m s , comparative c h a r t s , or 3D graphs can be generated. Spectral In telligence Corp. 213 Experimental d e s i g n . Mixture-De sign is a pair of computer programs that aids the user in the setup and analysis of experimental designs in volving t h r e e - or four-component m i x t u r e s . The software g e n e r a t e s factor combinations that include ver tex, edge, and centroid design points. Statistical Programs 214
ACS Publications and Services Biotechnology. Free pamphlet de fines and describes biotechnology, ex plains its uses, a n d addresses its present and future benefits and risks. 12 pp. 215 Handbook. Chemical Risk Communi cation: Preparing for Community Interest in Chemical Release Data is written for public health officials and other com munity leaders. Free handbook pre sents a basic understanding of risk assessment concepts and communi cation techniques that can be used when a community is affected by chemicals in the environment. A list of resources is included. 28 pp. 216
Companies interested in a listing in this department should send their releases directly to ANALYTICAL CHEMISTRY, Attn:
New Products, 1155 16th Street, N.W., Washington, DC 20036.
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PRODUCTS dents and college undergraduates, describing the challenges and oppor tunities provided by chemistry ca reers. Different specialties are high lighted by interviews with people in the field. Educational and financial considerations are discussed, and a resource list is included. 32 pp. 218
Manufacturers' Literature Life s c i e n c e s . Brochure highlights products for life sciences research, in cluding t h e r m o s t a b l e DNA poly merase, genomic-grade restriction enzymes, and nylon blotting mem branes. 16 pp. Amersham Corp. 219 DNA Thermal Cycler 480 System is a 48-well DNA amplification system that features an extended temperature range of -5 to 100 °C, storage of as many as 93 user-defined files, and a temperature verification system. Perkin-Elmer Cetus 217
Careers. Careers in Chemistry is a free booklet, directed to high school stu
LC. Booklet describes the analysis of foods and beverages using Aminex HPLC columns. Carbohydrate and organic acid, alcohol, and base sepa rations are discussed. 34 pp. Bio-Rad Laboratories 220 Liquid h a n d l i n g . Brochure high lights Models 221 and 222 autosamplers. Applications include FIA, ICP, DCP, and AA spectrometry. Gilson Medical Electronics 221
LABORATORY FLUORESCENT MICROSPHERES Distinctive colors for biology, diagnostics, physiology, aerosols, and filter testing. Diameters from 0.025 to 165 ..τη in red, green, blue fluorescence. Assorted surface properties for protein coupling. Free catalog available. Toll Free 800-334-3883. In Calif. 415-962-1100. FAX 415-962-0718 Duke Scientific Corporation
1135D SAN ANTONIO ROAD PALO ALTO, CALIF. 94303
FREE CATALOG GRAPH: great for scientific plotting and standard curve calculations, MINSQ: non-linear curve fitting and modeling, EQUIL: solution chemical equilibrium calculations, and more! Prices from $150.
1-800-942-MATH MicroMath, Salt Lake City, UT 84121-0550
To quickly amass data on all of the products you need, consult the Lab Data Service section on our Analytical Chemistry reader reply card insert.
Catalogs M o l e c u l a r b i o l o g y . Catalog con tains a hybridization incubator, pro g r a m m a b l e t e m p e r a t u r e cyclers, high-temperature microplates, and a chiller/pump unit. 8 pp. Techne 223 Filtration. Catalog features microfiltration products for process appli cations. Included are depth filters, cartridges, capsules, and filter hous ings. Gelman Sciences 224
For more information on instrumenta tion and software products, and/or to obtain the free available information on other listed items, please circle the appropriate numbers on one of our Readers' Service Cards.
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C h r o m a t o g r a p h y . Protein Purifica tion Notes, Vol. 1, No. 1, contains arti cles on a method for purifying highly active proteins from crude mixtures and on automated buffer blending. Waters Chromatography Division of Millipore 222
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426 A · ANALYTICAL CHEMISTRY, VOL. 63, NO. 7, APRIL 1, 1991
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