NEW
PRODUCTS
Water treatment. Series Ε-Plus re verse osmosis water treatment sys tems feature high recovery rates, modular membrane construction, in ternal connections t h a t eliminate bulky external piping, and high-per formance membranes. In addition, a waste flow control valve and a low feedwater pressure shutdown control are included. Culligan 416
IgM p u r i f i c a t i o n . I m m u n o P u r e IgM purification kit uses mannanbinding protein to selectively bind IgM. HPLC analysis shows that the eluted IgM product is at least 90% pure. Each run isolates ~ 3 mg of mouse IgM. The kit provides enough IgM purification buffers to perform 10 purifications. Pierce 419
DNA. Genetic thermal cycling sys tems, designed for DNA and gene amplification, enzyme digestion, en zyme catalysis, and DNA denaturing, consist of a GTC-2 thermal cycler and a low-temperature cooling mod ule. The unit holds up to 48 0.5-mL microfuge tubes in the sample block, which provides uniform tempera tures (±0.5 °C) between sample wells. Precision Scientific 417
Software
Detector. Model 7215 UV detector for HPLC features a motor-driven monochromator, low baseline noise (< 5 χ 10~ 5 ABU/hr at 250 nm), autozero, and variable outputs for a va riety of recorders and integration systems. Applied Chromatography Systems 418
D a t a b a s e . REGMAT database al lows regulatory references of chemi cals to be r e t r i e v e d by chemical name, CAS registry number, or UN hazard class number. Records can also be searched by a regulatory pro gram or agency. Chemical Informa tion Systems 420 Data management. Facilities infor mation reporting systems technology (FIRST) software monitors and re ports processes as required by the hazardous waste treatment storage and disposal facilities organic air emission standards for process vents and equipment, as well as the im pending national emissions standard
ΜΙΙΕΠίΙΕΙίΊΙ'ι'ΜΚΠΕΜ
for h a z a r d o u s air pollutants. Orr Safety 421 S p r e a d s h e e t . DataTalk software version 2.0 collects information from two RS-232 i n s t r u m e n t s simulta neously, i m p o r t s the d a t a into a spreadsheet, and exports it in a cus tomized format. Labtronics 422
ACS Publications and Services Intern program—information for s t u d e n t s . Brochure describes the application, selection, and place ment processes of the 1992 Summer Intern Program for college students sponsored by the ACS Division of An alytical Chemistry. 423
For more information on instrumen tation and software products, and/or to obtain the free available informa tion on other listed items, please cir cle the appropriate numbers on one of our Readers' Service Cards.
From Caveman to Chemist Circumstances and Achievements.
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The newAlltech catalog contains 700 pages of products and applications for chromatography •GC •HPLC •IC •TLC •Sample Prep •Filtration •Standards •Instrumentation
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hat was the connection between early chemistry and magic? What was the logic that made alchemists think they could make gold out of lead? Why were gases not recognized until the 17th century? Why did it take 49 years before Avogadro's hypothesis was accepted? In From Caveman to Chemist, author Hugh Salzberg traces the oddities of chem istry, examining cultural and political influ ences on the ideas of chemists. He follows the evolution of chemistry from the Stone Age beginnings of ceramics and metallurgy, through the rise and decline of alchemy, to the culmination of classical chemistry in the late 19th century. Chapters 1 through 9 lead from prehistoric technology, through ancient and medieval science to the study of chemicals and reactions that resulted in the 16th century birth of scientific chemistry. Subsequent chapters focus on key chemists such as Sala, Boyle, Black, Lavoisier. Dalton, Berzelius, Laurent, and Arrhenius as they developed the ideas that led to classical chemistry and the concepts of molecules, chemical reactions, homology, valence, and molecular formulas and structures, among others. Twenty topical illustrations enhance the text. Six timelines and two maps help readers understand the influences of early history on chemistry. Hugh W. Salzberg, Editor 300 pages (1991) Clothbound: ISBN 0-8412-1786-6 Paperbound: ISBN 0-8412-1787-4 $24.95 $14.95 Order from: American Chemical Society, Distribution Office, Dept. 88 1155 Sixteenth St., N.W., Washington, DC 20036
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