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Book Review Adsorption from Solutions of Non-Electrolytes. By J. J. Kipling

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Adsorption from Solutions of Non-Electrolytes. By J. J. Kipling, Academic Press, London-New York 1966. 1st Edit.,
xii, 328 pp., numerous Illustrations, 73 s.
This monograph sets out to familiarize the reader with a
field that up to now has received little attention, on the one
hand becausethemeasurementsaredifficult to carry out and on
the other because the results of such measurements frequently
yield only a complex expression that is difficult to interpret.
The book offers a good survey of the simultaneous adsorption of components of a liquid, as well as of a solution of a
solid in a n organic solvent, at the solidjliquid or gas/liquid
interface.
The term “solution” in the title can be misleading, since it
implies particularly the special case in which one component
is normally present in large excess, and this is not the case in
many of the systems treated. This term should perhaps only
be used, where one component is actually present in excess
(e.g. a solid in an organic solvent).
Methods of investigation are next considered, and these are
principally concerned with the analysis of liquid mixtures.
As a result, a clear distinction is made between individual and
composite isotherms; the former are concerned with the adsorption of a single component of a mixture or a solution,
and the latter with the simultaneous adsorption of all components. The different behavior of polar and nonpolar organic
compounds at liquid/solid and gas/liquid interfaces is demonstrated with the aid of many examples. In most cases a
monomolecular adsorption layer may be assumed; multimolecular adsorption occurs less frequently, and is thus
difficult to estimate quantitatively. The sorption properties
of molecular sieves, whose importance in analysis continues
to increase, are unfortunately treated only very briefly.
The thermodynamic calculations are useful, particularly the
evaluations of various isotherms. However, molecularphysical concepts based o n quantum mechanics, which have
been applied more recently to adsorbed gases and solids, are
completely lacking in the field under consideration.
The purpose of the book - to give to the research worker
interested in fundamentals a clear and well arranged exposition of a relatively complex field - is in general fully achieved.
It is to be hoped that the book will provide an impetus to
wider investigations in the field of adsorption phenomena.
G. Peschel [NB 727 IE]
Halogen Chemistry. By V.Gurmann. Academic Press, LondonNew York 1967.Vol. 1.lst Edit., xiii, 473 pp., several figures
and tables, bound $21.00 E6.
Halogen chemistry has recently become technically and
scientifically very interesting, and has consequently undergone a very rapid development. This collection of reviews of
important areas of the field by eminent specialists is therefore
welcome.
A. G . Sharpe presents a concise but easily understandable
discussion of the “Physical Inorganic Chemistry of the Halogens’’. The author has approached the problems from various
angles instead of simply listing the physical data. M. F. A.
Dove and D. B. Sowerby describe “Isotope-Halogen Exchange Reactions”. This article contains considerable experimental material, which is particularly valuable in preparative work. The “Physical and Chemical Properties of the
Halogen Fluorides” are described by L. Stein. This is followed
by a very good review by A . J . Popoil on “Polyhalogen Complex Ions”, which should prove an incentive to further investigations. The chapter on “Electronic Structure and MO
Treatment of Halogen and Inert Gas Complexes in Positive,
Negative, and Indefinite Oxidation States” by C. Jmgenseiz
IS a clear and understandable account of the theoretical
aspects of the halogen complexes. H. Selig finally describes
the recent “Fluorine Chemistry of the Inert Gases”.
The author and subject indexes at the end of the volume are
particularly useful. The authors do not all use the same
system for references, and in some chapters the references are
not indicated by numbers, which makes reading difficult. As
is to be expected in a work of this kind, some of the contributions are relatively short, while others give a wider description of the field. The book is a valuable aid to chemists working in every field as a source not only of information on what
has already been done, but also of inspiration for new re0. Gleinser [NB 735 IE]
search projects.
Chemistry and Enzymology of Marine Algal Polysaccharides.
By E. Percival and R. H. McDowell. Academic Press, London-New York 1967. 1st Edit., XII, 219 pages, several
figures and tables, bound, 60 s.
The authors have endeavored to present a critical review of
the very numerous and widely scattered papers dealing with
the polysaccharides found in marine algae and to summarize
the results from the chemical and enzymological points of
view.
A review of the occurrence and distribution of polysaccharides in algal species and a short chapter o n the methods used
for elucidating their constitution is followed by a discussion
of the neutral polysaccharides. the reserve substances and
skeletal substances. Alginic acids, representing the most importantpolysaccharides carrying carboxyl groups, are discussed next. This is followed by a discussion of the galactan
sulfuric acid esters known as agar, and also of polysaccharides
containing both carboxyl and sulfate groups. The last chapter
is a short one, in which the algal polysaccharides are discussed
in the context of their place among the plant carbohydrates.
The authors, both of whom have been working in this field
for a long time, have succeeded in presenting a cIear picture
of the current state of knowledge. They emphasize not only
the advances that were made possible by improved methods
but also the many problems as yet unsolved. Readers unfamiliar with the methods of macromolecular chemistry
would find a more complete treatment of molecular weight
determination, and especically of the problems,of viscometry
- possibly with references to review articles - very helpful.
This is a painstakingly written book, and it is strongly recommended to all chemists and biologists working in this
field.
E. Husemann [NB 733 IE]
Registered names, trademarks, etc. used in :his journal, even without specific indication thereof, arc not to be considered unprotected b y law.
0 Verlag Chemie, GmbH. Weinheim/Bergstr. 1968. - Printed in Germany by Druckerei Winter, Heidelberg.
All rights reserved. No part of chis journal may be reproduced in any form whatsoever.
written permission from the publishers.
r.g.
by photoprint, microfilm, or any other means, without
Editorial office: Ziegelhauser Landstrasse 35,6900 Heidelberg 1 , Germany, Telephone 4 5075 Telex 46 1855 kemia d, Cable address: Chemieredaktion
Heidelberg.
Editor: H . Griinewald. Translation Editors: A . J. Rackstraw and A . Slimson.
Publishers: Verlag Chemie, GmbH (Presidents Jiirgen Kreuzhage and Hans Schermer), Pappelallee 3. 6940 Weinheim/Bergstr., Germany. and
Academic Press Inc. (President Walter .
I
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Johnson), 1 1 1 Fifth Avenue, New York 3. N . Y.,USA, and Berkeley Square House. Berkeley Square,
London, W. 1.. England.
Correspondence concerning advertisements should be addressed to Verlag Chemie, GmbH. (Advertising Manager W.Thiel), 6940 Weinheim/Bergstr.,
Pappelallee 3, Germany, Telephone Weinheim (06201) 3635. Telex 4655 16 vchwh.
746
Angew. Chem. internat. Edit. 1 Vol. 7 (1968)
1 No. 9
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