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Book Review Organic Semiconductors. Dark- and Photoconductivity of Organic Solids. By H. Meier

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(Enzymes: Isolation, Analysis and Control). By A. Betz. Verlag Chemie
GmbH, Weinheim 1974. 1st edit., XII, 197 pp., 64 figs.,
7 tables, bound, D M 28.80.
German textbooks on enzymes were hitherto a rarity in the
bookshops, so the appearance of one by Augustin Betz on
enzymology in the “chemie paperback” series is particularly
welcome. This book is intended to provide the reader with
basic knowledge of enzymology and is designed in the first
place for students of biology and medicine. This purpose
is fulfilled in every respect. All that is important about enzymes
is summarized in eleven chapters: structure, biological function, mode of action and isolation, as well as applications
in analysis, therapy, and industry. The presentation is very
skilful and clear, and it is especially commendable that
emphasis is repeatedly laid on techniques. For a new edition
it remains only to hope that the chapter on allosteric enzymes
will be made more detailed and that hydrophobic interactions
will bedescribed. The book can be most warmly recommended
to all students who wish to enter the field of enzymology.
Horst Sund [NB 254 IE]
Organic Semiconductors. Dark- and Photoconductivity of
Organic Solids. By H. Meier. Monographs in Modern
Chemistry 2. Verlag Chemie GmbH, Weinheim 1974. 1st
edit., XV, 661 pp., 150 figs., 70 tables, bound, DM 138.-.
Here, from the hand of a skilful researcher, we have a
monograph in which the phenomena of photoconductivity
in organic substances are placed in the foreground. There
is undoubtedly a need for such a presentation, as physical
processes in the field of biology and similar questions are
matters of topical interest.
In the first part of the book the author has succeeded
convincingly in picking up the sometimes complete analogies
and the specific differences between the properties of inorganic
crystals and those of solid organic substances. A chapter on
the methods used for investigating organic substances, is followed by a second part which deals with electrical conductivity
and chemical structure on a large number of examples.
In the third part the reader finds a treatment of darkand photoconductivity, mainly from theoretical points of view.
The fourth part gives applications from, inter a h , the fields
of photobiological and industrial processes; photosynthesis,
the processes of vision, conduction in membranes, and
heterogeneous catalysts are only a few of the keywords. There
is also a discussion of the extent to which inorganic materials
can be replaced by organic compounds in electronic systems.
The author has succeeded in his aim of providing an intelligible presentation in spite of the high information density.
Precise formulations in a text that has been kept brief are
supplemented by numerous illustrations, more than 75 structural formulas and tables, and an unusually detailed bibliography with more than 2600 references. In this way it has been
possible to make contact with the scientist who wants a review
of this field, as well as providing the specialist interested
in the properties of specific substances with useful ideas.
H. Pagnia [NB 255 IE]
Lehrprogramm Enzymkinetik (Enzyme Kinetics-A Learning
Program). By H . N . Christensen and G . A . Palmer. Translated by H . U . Wolf. Pocketbook 23,Verlag Chemie GmbH,
Weinheim 1974. 1st edit., VI, 134 pp., 51 figs., 10 tables,
bound, D M 14.80.
This book by Christensen and Palmer, which now appears
in excellent translation, has won a special place among student
texts, being ideally suited to the treatment of enzyme kinetics
for a course of self-study. It is intended equally for students
of biology, chemistry and medicine, not only because such
students should know about enzymes but also because the
facts about enzyme kinetics can also be applied to pharmacological problems and to transport processes. The difficulty of
the program increases continuously from relatively easy beginnings, and on reaching the end one has the feeling of having
mastered enzymology. This applies not only to students but
also to specialists whose student days are long past and who
use the program as a refresher course-for them too it is
excellently suited. Everything about enzyme kinetics is described: the derivation of the Michaelis-Menten equation, the
importance of kinetic parameters and methods of their determination, the types of inhibition, allosteric enzymes (here
the text could be made somewhat more detailed in a new
edition), and also the pH and temperature dependence of
enzyme-catalyzed reactions. The reader can check his progress
from the problems. The book can be recommended unreservedly to all who wish to refresh their knowledge of enzyme
kinetics or require supplementary information to lecture notes.
Horst Sund [NB 256 IE]
Registered names, trademarks. etc. used in this journal, eoen without specific indication thereof, are not to be considered unprotected by law
0 Verlag Chemie. GmbH, D-6940 Weinheim. 1975. - Printed in Germany by Zechnersche Buchdruckerei. Speyer/Rhein.
AU rights resmcd (including those of translation into foreign languages). No part of this issue may be reproduced in any form - by photoprint, microfilm, or any other means - nor transmitted or translated into a machine language without written permission from the publishers. Only single copies of contributions, or parts thereof, may be reproduced for personal use. Copies
reproduced and used other than for private purposes in an industrial or commercial undertaking are subject to copyright and, in such cases, a copyright fee must be paid to the VG Wissenschaft GmbH. FrankfurtJMain 1. Grosser Hirschgraben 17/21. from whom conditions of payment can be obtained on request.
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Editor: H . Griinewald . Transistion Editors: A. J . Rackstraw and A . Stimson.
Publirben: Verlag Chemie, GmbH. (Managing Directors hirgen Kreuzhage and Ham Schermer) Pappelallee 3, D-6940 Weinheim, Germany
and Academic Press Inc. (President Charles Hutr). 1 1 1 Fifth Avenue, New York 3, N . Y . , USA. and Berkeley Square House. Berkeley Square, London, W. 1.. England
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dark, solids, meier, book, organiz, semiconductor, photoconductivity, review
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