RESEARCH
DO YOU ANALYZE
T h e new center combines in one location GE's bearing and lubricant development facilities. A t one time, these were divided between a company plant at Lynn, Mass., and the General Engineering Lab at Schenectady. The combined facility now has a staff of 3 0 , which will b e doubled in the future.
SULFUR IN OIL? OIL ADDITIVES? RUBBER?
COAL?
COKE? OR OTHER
CARBONS
If you e n g a g e in this activity WRITE
IMMEDIATELY
FOR INFORMATION ABOUT THIS NEW
Leco
DEVELOPMENT!
From Leco, a completely new procedure for the analysis of sulfur i n oil, oil additives, rubber, coal, coke, hydrocarbons . . . reducing analysis of these materials to a fraction of the time required for conventional methods. Write today for complete information!
Leco sulfur determina tors for
IRON STEEL OIL COAL
· · · ·
COKE
ORES CATALYSTSRUBBER
· · ·
Leco Automatic Sulfur Titrator with Leco Induction Furnace It will pay you to follow the example of America's leading industrial testing laboratories, today using more LECO Sulfur Determinators for iron a n d steel analyses than all other makes combined. See the new LECO A u t o m a t i c Sulfur T i t r a t o r * . Frees t h e operator during analysis, eliminates human error in determining the end point. A fast, positive, labor-saving laboratory technique! •Patents Pending
Send Today f o r FREE CATALOG!
5394
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An experimental high-temperature lubricant is heated at GE's new bearing and lubricant center. Taking flow measurement data is Vendos Shedigian
GE Opens New Center New bearing and lubricant lab to aim work a t high speed problems of the space age GENERAL
ELECTRIC
has
officially
opened its new million dollar bearing and lubricant development center at Schenectady, N. Y. GE says it is the largest facility of its kind in American industry. Scientists will use the center to explore a host of new concepts in bearing design and lubrication—concepts brought on by the era of supersonic speed. The new lab, says R. 0 . Fehr, of the company's General Engineering Lab, will allow GE to expand research programs to meet demands for faster jet engines, guided missiles, and also for automation and advanced powergenerating equipment. One such program planned for the immediate future is air-lubricated bearings. While not an entirely new field, the air bearings are particularly intriguing for high temperature and high speed problems, since these bearings greatly reduce or, in some cases eliminate, friction. Another research area involves the use of molten metals or molten glass as supersonic lubricants. Still other programs call for close studies of many oils, greases, synthetic and solid lubes, for various high and low temperature applications.
• Dislocation strains in silicon single crystals can be detected. Silicon is transparent in the near infrared, and measured photoelastic constants are large enough that strains of 1 p .p.m. can be detected by infrared microscope and infrared photography. The studies, conducted b y W. L. Bond of Bell Telephone Laboratories, show that growth striations due to small periodic variations of impurity concentration appear almost devoid of dislocations, suggesting that less energy is needed to incorporate small amounts of impurity atoms in a crystal by elastic distortion without making dislocations than by making dislocations. • Goiter m a y result from overconsumption of certain foods, says Monte A. Greer. Using radioactive iodine, the University of Oregon medical school scientist found that rutabaga and turnip contain relatively high amounts of goitrin, L-5-vinyl, 2-thiooxasolidone. This goiter-causing compound is also obtained in other Brassicae—cabbage, cauliflower, Brussel sprouts, and kale, for example—Greer told a Symposium on Endocrines and Nutrition held at the University of Michigan. • The adrenal glands of dogs with edema secrete excess aldosterone, according to Wilmot C. Ball, Jr., and associates of National Heart Institute. Until now the origin of this excess was unknown—did it accumulate because of some defect in the normal mechanism for destroying it in the body or was it the result of overproduction. Analysis of adrenal blood of dogs indicates the latter. • Sominat, a hypnotic-sedative drug, is a molecular complex of chloral hydrate with antipyrine, a mild analgesic. The unfortunate characteristics of chloral hydrate, such as unpleasant smell and taste and a tendency to irritate the gastrointestinal tract, are eliminated with the complex, says National Drug. Sominat is said to produce sleep almost as effectively as barbiturates, with considerably less danger of becoming habit-forming. • A n e w evacuant from Schenley Laboratories combines a wetting agent di-
New conveyor belt made with MYLAR® helps solve another industrial problem In m a n y plants throughout the coun try, abrasive, corrosive and sticky prod ucts are raising havoc with conven tional conveyor belts. But thanks t o a new type of conveyor belt made with "Mylar" polyester film, firms such as S. F. Whitman Co. and Sons, Inc., Philadelphia, have extended conveyor belt life while cutting plant mainte nance costs. Where special problems exist, con veyor belts made with "Mylar" are giv ing excellent performance because they are: D i m e n s i o n a l l y S t a b l e — " M y l a r " is not affected when exposed t o extremes of mois ture o r temperature. Service range is from - 6 0 ° to 150°C. S m o o t h Surfaced—"Mylar" provides excellent release for sticky substances. T h e surface is smooth and stays that way. C h e m i c a l l y Resistant—"Mylar" resists at tack by most solvents a n d chemicals; it's unaffected b y hot oils or greases. Strong and Durable—"Mylar", because of high tensile strength, withstands high ten sions to which conveyor belts are subjected. C l e a n and Sanitary—"Mylar" is unaf fected by bacteria. It has n o ridges or valleys to h o l d dirt- It's easy to clean and keep clean.
T h i s is another example of how Du Pont "Mylar" is helping improve established products and create new ones. Whether you make guided mis siles or ladies' handbags, "Mylar" may help improve performance or increase the over-all value of your product. For more information on "Mylar" or prod ucts made with"Mylar" send in coupon. Da Pont manufactures the basic material "Mylar" —not finished conveyer belts. • Products like hot, sticky doughnuts with highly abra•"MYLAR"* is Du Pont's registered trademark sive sugar are rough on most conveyor belts, reports o n e for its brand of polyester film. of the nation's largest bakers. But when made with tough, durable "Mylar", belts resist abrasion—last longer.
DU PONT REG. U.S.PAT.OFF.
BETTER THINGS FOR BETTER LIVING . . . THROUGH CHEMISTRY
•»11I:T.»H
I.UWilrJ
POLYESTER; F I L M
-Plaques made with "Mylar" help S Sons, I n c . , achieve a smooth finish their famous chocolate candies. "Mylar" helps maintain a tradition
F.Whitman.Co & o n all surfaces of Bacteria-resistant o f top quality.
In Canada, "Mylar" is sold by the Du Pont Company of Canada Limited, Films Div., P. 0. Box 660, Montreal. Quebec. Ε. Ι. du Pont de Nemours & Co. (Inc.) Film Dept., Room C-11, Nemours Building, Wilmington 9 8 , Delaware. Π Please s e n d me names o f firms who manufacture conveyor belts made with "Mylar" polyester film. Π Please s e n d me information o n properties, applications and types of "Mylar" available (MB-4).
Application. Name
Firm Address. . State_
City
NOV.
5,
1956
C&EN
5395
RESEARCH
NOW...
octyl sodium sulfosuccinate and a peri staltic stimulant 1, 8-dihydroxyanthraquinone (Dorbane). The company recommends the product, Dorbantyl, for management and treatment of con stipation.
Dynamic Separation for fruit and vegetable juice processing
Contrast compositions for radiog raphy of the internal organs can b e stabilized by addition of carboxymethyl dextran. Rapid settling of the barium sulfate, bismuth sulfate, or other mate rials used to outline the organs resulted in undesirable contrasts and accumula tion of the material in pockets of the viscera. Midland Chemical, 1771 Springfield St., Dayton 3, Ohio, will license the process.
FEED
HELIX
SCREEN CONE (SCREEN SUPPORTS)
• Battelle Memorial Institute is un dertaking a thorough and critical evaluation of the present knowledge of metal cutting. Study is supported b y a $37,600-contract from American So ciety of Tool Engineers.
LIQUID HILTRATE
SOLIOS DISCHARGE HELIX DRIVE SHAFT 2460 R.P.M.
CONE DRIVE SHAFT 2400 R.P.M.
MERCONE MODEL 400 SCREENING CENTRIFUGE
the Mercone Screening Centrifuge Dynamic?
Yes, both in operation and performance the Mercone Screening Centrifuge i s designed to provide continuously, high rate separation of pulp into dry solids and liquid filtrate. Basically, operation consists of subjecting a high rate, positive feed to centrifugal force along an increasing diameter screen. Liquid is spun through the screen by a force of 18O0 centrifugal gravities, solids are moved spirally down the screen by a helix conveyor. With the increase of screen diameter higher G.'s are encountered and solids form a dense bed through which the liquid passes. This filtering action results in greater filtrate clarity than screen openings would normally indicate. The feasibility of this new separation principle has been proven con clusively in small scale test runs. Applied to the dejuicing and/or dewatering of pineapple juice (milk and beverage), apple, tomato and carrot pulps and the dewatering vegetable matter, Mercone centrifugal screening has consistently produced results ranging from good t o ex cellent both in desired'clarity and capacity. Perhaps you require higher capacities or better performance in your present operation or more specifically there may be a "problem separa tion" in your flowsheet. If so, high speed Mercone centrifugal screening may produce answers of a particularly advantageous nature to you. For more complete information just drop a line outlining your particu lar application, t o Dorr-Oliver Incorporated, Stamford, Connecticut.
φ New Virus in Blood
Mercone is a t r a d e m a r k o f Dorr-Oliver Incorporated
A whole new family of viruslike agents may be present in the human blood stream, according to research by I. William McLean, Jr. (right), and Fred D . Stimpert of Parke-Davis. About 25% of normal blood serum specimens produce degenerative changes in a special culture of human bone marrow cells; almost 100% of specimens from victims of infectious hepatitis produce the changes. This evidence, McLean told the International Symposium, Hepatitis Frontiers, held in Detroit, strongly suggests that the changes are due to the hepatitis virus. The work may he a preliminary step in develop ment of a hepatitis vaccine and estab lishment of reliable tests for detecting hepatitis in human blood and serum.
DORR-OLIVER INCORPORATED
WORLD - WIDE RESEARCH ENGINEERING EQUIPMENT S
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