TheNewPtoduct Bulletin Board from J.T. Baker SpemUn-puritied The J.T. Baker PHOTREX" line of high-qualityspectrophotomeric solvents has had 20 new additions: Glycerol Carbon Disulfide Heptane Methyl iso-Butyl Ketone Reagent Alcohol, Denatured Nitromethane Pentane Tetrachloroethylene Methyl Ethyl Ketone Plus 11 other new PHOTREX solvents. Now the PHOTREX line numbers 35 superior solvents, all with the actual lot analysis on the label. How do I learn more? 1. Check your new J.T. Baker cata log 750: page 288.
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Books techniques, and statistical analysis. These sections are concise and espe cially well suited for the beginner. The last section is also well written but more theoretical than practical. In particular, actual statistical applica tions would have enriched this section. In addition, with the increasing em phasis on the use of immobilized en zymes and ion electrodes, a more updated review would have been ap propriate. Section Β of this volume is devoted to biochemical reagents. Its appear ance at the beginning of the series is helpful, but it is the opinion of this re viewer that the section on enzymes, which is concise and easy to follow, might better have been incorporated into volume 2. For the next edition, the authors might consider incorpo rating the section on concentration of metabolites in tissues, which now ap pears in volume 4 as another part of the general introduction. Volume 2 includes the methods for the determination of enzyme activity, following the nomenclature system recommended by the Committee on Biochemical Nomenclature (1972). Sufficient information is provided (re agents, preparation of solutions, equipment, etc.) so that the worker need have no problem in the use of any method. It would be of some bene fit to the reader if the table on nomen clature, which appears in the appen dix, had been placed at the beginning of the volume. Volumes 3 and 4 cover most of the metabolites which can be determined enzymatically: carbohydrate, citric acid cycle, proteins, polypeptides, amino acids, and finally nucleic acids presented in volume 1; these sections provide a richer background on each of the enzyme systems employed. However, most of the metabolites cov ered are not reviewed beyond 1971. On balance, this four-volume series is an excellent addition to any library.
J.T. Baker Chemical Co. 222 Red School Lane Phillipsburg, New Jersey 08865
New Books
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Nuclear Quadrupole Resonance in Chemistry. G. K. S e m i n , T. A . B a b u s h k i n a , and G. G. Y a k o b s o n . χ + 5 1 7 p a g e s . Halsted Press, 6 0 5 Third A v e . , N e w Y o r k , N.Y. 1 0 0 1 6 . 1 9 7 5 . $ 4 7 . 5 0
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This book is translated from the Russian by A. Barouch and the trans lation is edited by A. J. Pick. Since the book is intended for chemists inter ested in the application of nuclear quadrupole resonance in solving
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