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VOLUME 33, NO. 12, DECEMBER. 1956 and the solubilized collagens, whereas the thesis of branched-chain compounds,'' chemistry and reactivity are given scant by Konrad Bloch; "Some metabolic prodattention only. These Isst are the princi- ucts of hasidiomyeetes," by M. Anchel; pal issues of this hook. The presentation "The development of a plasm& volume has been arranged to suit the nonspecial- expander," by M. Bovarnick and M. R. ist as well as the specialist." The problem Bovarnick; "Problems in lipidc metaboof cross linking of collagen is covered lism," hy S. Gurin; "Tetrwoles as carboxylie acid analogs," by R. M. Herhst; comprehensively. The background for this monograph is "The structural basis for the differentiathe author's intensive work with collagen tion of identical groups in asymmetric in the form of hides and skins for nearly 40 reactions," by H. Hirschmsnn; "The years. I t is s. most comprehensive treatise metabolism of inositol in microorganisms: and in the opinion and knowledge of the a study of molecular conformation and reviewer the best work an the subject now biochemical reactivity," by B. Magaexisting. It is also a beautiful example of ssnik; "The biochemistry of ferritin," by A. Mrtzur; "The biosynthesis of porthe printers' art. ARTHUR W. THOMAS phyrins," by D. Shemin; "The role of carbohydrates in the biosynthesis of are: co,,nller* U N l V E n s l T r matic compounds," by D. B. Sprinson; NEWYORK.NEW YORK "Glycogen turnover," by D. Stetten, Jr., and M. R. Stetten; and "The veratrum alkamines," by 0 . Wintersteiner. ESSAYS IN BIOCHEMISTRY In summary, the following statement Edited by Samuel Gmff. John Wiley h from the preface is apropos: "The essaySons, Inc., New York, 1956. x 345 pp. ists were accorded free rein in regard to subject and style. The articles, for the Figs. and tables. 15.5 X 23.5 cm. $6.50. most part, are neither reviews nor experiwas written mental reports. Some me critical discus"ESSAYSIN BIOCHEMISTHT" in tribute to Professor Hans Tbacher sions of the status of a biochemical pprobClarke by former students and academic lem at the time of writing, whereas others associates on the occasion of his retirement. are frankly speculative or deliberately Twenty-five biochemical subjects are sur- provocative." Students, teachers, and reveyed by experienced researchers in essays searchers dike will find "Essays" stimuwhich give the reader an evaluation of the lating reading. present status of research on the problem ORVILLE G. BENTLEY concerned and an over-all appraisal of Otlro Aemooman~fiEXPEBI~ENT STATION hypotheses now being experimentally W o o s ~ e Onro ~. tested in various laboratories. To many readers, the philosophy of the research a p proxh expressed in the following essays will stimulate some reflective thinking: BLOOD GROUP SUBSTANCES: "Very big and very small-remarks on THEIR CHEMISTRY AND conjugated proteins," by E. Chargaff; IMMUNOCHEMISTRY "Biochemistry of lysogeny," by E. Borek; "Unbalanced growth and death, a study Elvin A. Kabat, Deparbnents of Microin thymine metabolism," by S. S. Cohen; biology and Neurology. College of Physi"The chemical basis of heredity deter- cians and Surgeons, Columbia University, minants," by Stephen Zamenhof; "Some and Neurological Institute, Presbyterian thoughts on the biochemistry of steroid Hospital, New York. Academic Press, Inc., hormones,'' by L. L. Engel; and "On the New York, 1956. i s 330 pp. Many bigness of enzymes by D. Rittcnberg. figs. and tables. 16 X 23.5 em. 58. It is not surprising that "Biosynthesis of T m s little volume is an attempt by one peptide bonds," by J. S. Fruton, "On determining the chemical structure of pro- of the expert workers in the field to collect teins," by W. H. Stein, "Some aspects of together the information now available nitrogen transfer in biosynthetic mech- on hlood group substances. "The term anisms," by 8. Ratner, and "Thenitrogen- blood group substance refers to any of a sparing effect of glucose," by H. D. Hober- number of substances on or in the surface man, are found among the titles since the of erythrocytes which are present in cersubject of proteins is so vital to the field tain individuals of a species but lacking these scientists represent. Likewise, "He6 in others." At the present time in huerogeneity of deoxyribonucleic acid," by mans alone about 50 different substances A. Bendich, "The biochemistry of the of this kind have been detected. In genbacterial viruses," by E. A. Evans, Jr,, eral they are complex structures contain"On the nature of cancer," by S. Graff, ing hoth polysaccharide and amino acid dong with articles previously mentioned, units. Only a few, however, have been by S. S. Cohen and S. Zamenhof, present the subject of detailed chemical investithe challenge to the modern biological gation. Dr. Kabat devote8 about half scientist-the chemical basis for the trans- the hook to a, disoussion of the purification mission of genetic characteristics of living and chemical reactivity of these few. The teacher of chemistry will find here cells. The diversity of subjects covered is sug- a wealth of information illustrating the methods for studying complex molecules. gested by the following titles: "Biosyn-
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Many fields of science are used in the work. "The chemistry of the hlood group substances has been studied in few laboratories, but these investigations have had a considerable impact on and have drawn considerably from the related fields of Immunochemistry, Immunology, Carbohydrate and Protein Chemistry, Thermodynamics and Physical Chemistry, Genetics, and Clinical Medicine." A stimulating feature of the hook is the comments on the many aspects of the studies that are still incomplete either far lack of enough work or for lack of a. goad idea. Such suggestions ought to be a source of interest to the more mature students as they consider the kinds of chemical problems still waiting solution. Dr. Kabat has given anexcellent present* tion of a subject filled with technical complications. LAURENCE E. STRONG Enn~nnuC o m m e R~cnuoao,INDIANA
ION EXCHANGE TECHNOLOGY Edited by F. C. Nachod, SterlingWinthrop Research Institute, and Jack Schubert, Argonne National Laboratory. Academic Press. Inc., New York, 1956. x 660 pp. Many figs. and tables. 16 X 23.5 cm. 515.
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THE growth of the importance of ion exchangers in technical operations has made this comprehensive survey of their present applications a welcome addition to any reference ~helf. The fact that the contributors judiciously weigh the limitations as well as the advantages of employing ion exchange resins, and that the chapters deal with the design, equipment, operation, and economics of the process makes the book so much the more valusble. Nearly every chapter is alive with ideas, hoth explicit and implicit, for additional applications and for fruitful research. The editors aspired to produce "a book on ion exchange which would serve hoth as a reference and as a textbook for technologists and engineers." They succeeded in compiling a reference work for chemists as well. Only as a text is it Limited to technologists and engineers. The twenty chapters by thirty-faur contributors are divided into two sections: fundamental aspects and applications. The treatment of fundamental aspects suffers from the absence of a unified discussion of the physical chemistry of inn exchangers. Instead, topics such as the mechanism of exchange and the cause of swelling are dealt with whenever a contributor felt the necessity for discussing them. As a result, previous knowledge of ion exchange chemistry is often required for a full appreciation of the discussions. The applications that are discussed include both commercial and not yet commercial uses: water treatment, metals
