Chemical Thermodynamics (McGlashan, ML) - ACS Publications

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BOOH REVIEWf current interest in solutions of electrolytes would seem to dictate a mare complete treatment. There are nu tables of thermodynamic data such as are usually contained in hooks an

very few exampl&-worked out in the text. The namine of ouantities and choice of

become accustomed to but is used carefully and consistently throughout the book. The printing of the book is welldone. Onlv one typographical error was found (line 2 on page 134). The paper and binding are barely adequate. Fur the price one would hope for better. The book is an excellent text for the student who wants to learn what thermodynamics is all about. I t contains nothing that will have to be set aside a8 unimportant or only half true. The book is not a typical textbook of thermodynamics but an elegant discussion of the essence of thermodynamics by one whose understanding of and affection for the subject are clearly evident. RICHARD L. SNOW Brigham Young University Provo. UT 84602

Topics in Enzyme and Fermentation Biotechnology 3 Afan Wiseman. (Editor), University of Surrey. Guildford,Ellis Horwood Limited, ChiChester. 1979. v 295 pp. Figs. and tables. 23 X 15.5 cm.$54.95

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This volume is the third in a continuing series of separately authored chapters on widely-ranging topics in the general area of enzyme technology. The sin chapters are entitled: Uses of Oxyanions in Enzyme Equilibrium Displacement, Developments in Microbial Extracellular Enzymes, "Rennets" and Cheese, Scale-Up of Fermentation Processes, and New and Modified Invertases and Their Aoolieatinns.

great deal of useful information on eomplexing of anions suchas borate, germanate, molybdate, and tungstate to polyhydroxylic structures, a great many of which are esrbohydrates and rekted substances such as NAD and glycoprotein enzymes. The effects of oxyanions on enzyme-catalyzed aldose-ketoae intercanversions for a number of carbahydrate pairs is described together with some

somewhat incomplete and some of the references are quite dated. Nevertheless, the information on the chemistry and role, or potential role, of one polyanion or another in shifting the equilibrium position of such reactions so as to increase the yield of the desired form will be very useful to those who plan either basic laboratory experiments in

A178

Journal

of Chemical Education

order to gain new fundamental information or to others who have practical applications in bind. The chapter by Fogarty and Kelly, "Develooments in Microbial Extracellular Enzymes," contains a detailed survey of sources and types of a-amylase, &amylase, other amylases, amyloglucosidase, amylopeetin debranching enzymes, cellulases, pectinolytic enzymes, and proteases. A short section an general factors to be considered in enzyme production is included, along with brief descri~tionsof new methods for oroductian and puGfication of certain of the knzymes listed above. I t would seem, considering the increased interest in hiomass fermentations, that the section on cellulases will be of particular interest. Another section on immobilized enzymes is alsovery timely. The authors have madea useful survey of the types and applications of immobilization. However, this subject is mueh too large and complex to receive full treatment here. Particularly missing are the chemistry of immobilization and the effects of immobilization on behavior of enzymes. The chapter entitled "Rennets" and Cheese, by R. Scott, is highly specialized, but it is a valuable source of information to food processors, especially those in the area of dairy manufacturing. I t gives a good view of the comolexitv of the casein svstem. the t ~ r s ~

zymes from numerous enzyme sources which can have a "rennet" function. Also treated are the types of cheese and the proteases used in their manufacture as well as applications (or lack of aoolieation) of immobilized en^ The chapter, "Scale-Up of Fermentation Processes," is a small textbook concerning management of cultures, sterilization procedures and physical conditions for making the transition from laboratory scale to much larger fermentations. In this case, as is comman in the applications area, the word "fermentat,ion" is used in a broad sense to mean conversion by microorganisms of a material to products under either anaerobic or aerobic

probably he by those engaged in the conversion of a laboratory process to pilot plant and higher scale; however, there is also very valuable information for those research scientists who wish to "scale-up" newly discovered processes in their laboratory using one of the several commerciallyavailable, but not necessarily small, laboratory fermentors. Such investigators, often coming from a variety of fields, may not he aware of the many factors involved and hence succeed subopti~ mally, marginally, or not a t all. The chapter by Wiseman, New and Modified Invertases and Their Applications, presents a comprehensive survey of the chemistry of invertasen from various sources. His treatment of the subject matter (in particular, the section on chemical stabilization and immobilization) is very thorough and obviously well researched. However, portions of the chapter suffer from some excess verbiage, overuse of parenthetical expression, and inclusion of unnecesJary information which detract from an otherwise smoothly flowing treatise. Overall this vt I L I W , c.p-c~:~Il,~ ~ , , : ~ t with t i >