Amino Acid Profiles
DESIGN
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Copies of the 24-p technical paper, "Determination of Amino Acid Pro files in Biological Samples by Gas Chromatography," by R. F. Adams are available from the company. PerkinElmer Corp. 462 GC Valves The latest issue of "Current Peaks" features a practical guide to the selec tion and installation of gas chromato graphic valves and discusses Carle's "sequential analysis" valve system. Carle Instruments, Inc. 445 1975 Product Guide Analog Devices's 1975 product guide will prove useful to designers of mea surement instrumentation and com puter-based control systems which ac cept, analyze, and process analog sig nals. Analog Devices, Inc. 464 OSHA Concentration Limits for Gases Wilks Scientific Corp. is offering a 3 X 2-ft wall chart with updated maxi mum tolerable limits set by OSHA for more than 400 gases and vapors. In frared analytical data for most of the substances listed are included. Wilks Scientific Corp. 465
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Computer Analysis and Control "Computer Analysis and Control of Biochemical Processes," 16 p, dis cusses the state-of-the-art methods of monitoring process parameters and advances in dynamic analysis. New Brunswick Scientific Co., Inc. 466 Multipurpose Transducer UniMeasure/80 is a multipurpose transducer that adapts to an unlimit ed variety of measurements including position, displacement, acceleration, weight, strain, torque, pressure, and force. The company's 6-p brochure gives full details. UniMeasure 467 Neutron Analysis Systems Neutron Analysis Systems for process and product quality control, 4 p, pro vides details on the basic concepts of the instrumentation and describes some typical applications. Columbia Scientific Industries 468 Micro-Miniature Tools A full line of micro and miniature tools is shown in this company's 14-p brochure of handtools for microscopicwork. Tool kits, micro-drills, and dia mond scribing tools are included. Minitool Products 460
Anaerobic Biological Treatment Processes
ADVANCES IN CHEMISTRY SERIES No. 105 Nine papers from a symposium spon sored by the Division of Water, Air, and Waste Chemistry, chaired by Frederick G. Pohland. Process balance is the crucial key to the future of anaerobic decomposition in water pollution control. This volume explores this problem and other ques tions relating to the present state of the art and future of this field. Topics include methane fermentation; volatile acid formation, toxicity, synergism, antagonism, pH control, heavy metals, light metal cations; dynamic and steady-state models; energetics and kinetics of anaerobic treatment; phase separation by dialysis; and the applica tion of process kinetics in the design of these systems. 196 pages w i t h index Cloth (1971) $ 9 . 0 0 . Postpaid in U.S. and Canada; plus 4 0 cents elsewhere. Set of L.C. cards w i t h library orders upon request. Order from: Special Issues Sales American Chemical Society 1 1 5 5 Sixteenth St., N.W. Washington, D . C 2 0 0 3 6
ANALYTICAL CHEMISTRY, VOL. 47, NO. 7, JUNE 1975 · 725 A
