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Book Review Bakterien- Phagen- und Molekulargenetik (Bacterial Phage and Molecular Genetics). By U. Winkler R

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is carried out at 4O&-55O0C in a fluidized bed with continuous
regeneration of the catalyst with air (burning off of C). The
C content of the catalyst is adjusted by suitable choice of
the regeneration conditions. [DOS 2203 384; Riitgerswerke
AG, Frankfurt]
[PR 181 IE G I
To prepare heat-curable acrylic polymers, polyacrylic esters
containing hydroxy groups are mixed with a polyfunctional
1,3,4-dioxazol-2-one (nitrile carbonate) having the formula
( I ) and cured at 120 to 150°C. The polymers containing
hydroxy groups are obtained by copolymerization of acrylic
or methacrylic esters with hydroxyethyl or hydroxypropyl
Esters of N,N‘-ethylenedicarbamicand ethylenedithiocarbamic
acids having the formula ( 1 ) (R, R3=alkyl; R’, R Z = H , lower
alkyl; X, X’=O, S), in particular the compound (2) with
0 C&
I/
I
H O
Alk-S-C-N-CH2-CH2-PI.-~-S-*lk
(2)
Alk = C3, C4-alkyl,are insect metamorphosis inhibitors similar
to the natural juvenile hormone. [DOS 2324020; Stauffer
Chemical Co., New York (USA)]
[PR 183 IE S]
(meth)acrylates. The hydroxyl values are between 20 and 150,
and the acid values between 0 and 25mg of KOH/g of substance. The preferred nitrile carbonate is adiponitrile carbonate
(Z), R =-(CH,),-,
n = 2. On curing, free isocyanate groups
are forqed, and th‘qse crosslink with the hydroxy groups.
Adiponitrile carbonate is used mainly as a crosslinking agent
for acrylic varnishes. [DOS 2220806; Atlantic Richfield Co.,
New York (USA)]
[PR 186 IE W]
BOOK R E V I E W S
Bakterien-, Phagen- und Molekulargenetik (Bacterial, Phage,
and Molecular Genetics). By U . Winkler, R . Riiger, and
W Wackernagel.Springer Verlag, Berlin-Heidelberg-New
York 1972. 1st ed., xi, 285 pp., 15 figures, stitched DM
14.80.
The present book is an attempt to fill a gap among the
German-language practical textbooks for universities. It appears to me that the attempt has been successful. The book
contains a large number of carefully written experimental
procedures for practical courses in molecular genetics. Each
experiment is preceded by an introduction giving the theoretical background. This is followed by aim, materials, procedure,
evaluation, literaturedata, and sometimes exercises for practice
(with answers). Thedescription of theexperiments is so detailed
that the student can profitably work through an experiment
even if he has not carried it out. Each experiment is followed
by a suggestion regarding the recording of the results, a safe
didactic form that can save the course supervisor a great
deal of irritation, but in some cases also slightly relieves the
student of the need to think over the experiment.
Besides many experiments with Escherichia coli and corresponding phages, the book contains a surprisingly large
number of experiments with Servatia marcescens and Serratia
phages. The main reason why so much space is devoted to this
second bacterium is probably that it is one of the author‘s
working organisms. In my opinion it would have been better
from the student’s point of view to extend the experiments with
E. coli, the “pet” of molecular biologists. For example, the
book fails to describe an experiment as important as the
penicillin selection of auxotrophic mutants in E. coli. The
authors are not consistent in their use of abbreviations; alongside the German DNS, RNS, etc., they use English abbreviations such as EDTA and cpm. A detailed subject index should
be regarded as an absolute necessity for the next edition.
The usefulness of the present book to the advanced student
would undoubtedly have been increased by more frequent
indications of the relationships with current research work?
and not just with reviews. The book should be very useful
as a German-language introduction and as a handbook for
3 54
practical courses in molecular genetics. It is to be hoped
that it will give many students an understanding of molecular
genetics“].
Klaus Willecke [NB 180 IE]
Koordinationsverbindungen (Coordination Compounds). By S.
F. A. Kettle. Taschentext Vol. 3. Verlag Chemie, Weinheim
1972. 1st ed., xii, 245 pp., 106 figures and 25 tables, bound
DM 16.80.
The “representative coverage” of a field of chemistry as
large as modern coordination chemistry in a handy volume
of theTaschentext (“pocket text”) series is nowadays practically
impossible without drastic limitations. The book by Kettle,
which was first published in English in 1969 and is now
available in a German translation, is thus confined mainly
to the coordination chemistry of the transition metal ions,
omitting all organometallic, compounds and systems containing metal ions in lower oxidation states. The book is
arranged not according to groups of substances but according to general aspects such as “Nomenclature and Geometrical Structure” (Chapter 2), “Preparation” (Chapter 3), “Stability” (Chapter 4), “Crystal Field Theory” (Chapter 5), “Ligand
Field Theory” (Chapter 6), “Electronic SpectIa” (Chapter 7)
“Magnetic Properties” (Chapter 8), “Other Methods for the
Investigation of Coordination Compounds” (Chapter 9),
“Thermodynamic and Related Aspects of Crystal Fields”
(Chapter lo), and “Reaction Kinetics” (Chapter 11).
The author’s marked interest in problems of electronic
structure and static bonding in transition metal complexes
can be seen e.g. from the fact that Chapters 5 to 8 together
with the “theoretically” oriented Appendix occupy more than
125 of the 242 pages in the book, whereas the treatment
of e.g. equally important topics of reaction kinetics and
mechanisms is clearly too short, covering only 17 pages.
[‘I For more advanced requirements and as a source of technical hints
relating to E. coli genetics. see the recent work by J . H . Millur-”Experirnents in
Molecular Genetics”, Cold Spring Harbor Laboratory, 1972
Angrw. C h m inrernar Edit.
/ Vol. 13 (19741 J No. 5
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