close

Вход

Забыли?

вход по аккаунту

?

BOOKS REVIEW Einfhrung in die Physik (Introduction to Physics). By R. Fleischmann

код для вставкиСкачать
and lead to a narrower molecular weight distribution with
a remarkable increase in molecular weight (qred3-3.6 dI/g
as compared with 2.1 3 dl/g). [DOS 2206386, Wacker-Chemie
GmbH, Miinchen]
[PR 187 IE-W]
Combustion-resistant acrylic glass based on methyl methacrylate and phosphoric acid or esters of phosphoric acid are
obtained by copolymerization with bromophenyl methacrylates (pentabromophenyl, dibromophenyl, and tribromo-
phenyl methacrylate). The softening point is only slightly
depressed (Vicat values between 120 and 133°C) by this addition. 5 to 10wt.-% of ( I ), phosphoric acid, or tris(bromocresy1)
phosphate are used as the phosphorus derivative. [DOS
2202791, Rohm GmbH, Darmstadt]
[PR 188 I E-W]
Electrophoretic binders for cationic deposition that crosslink
at high temperatures consist of a synthetic resin containing
hydroxyl groups, which is partly allowed to react with a
polyisocyanate blocked at one end, and also containing amino
groups. The resin is dispersed in water by quaternization
with lactic acid or acetic acid. As an example, a bisphenol
A epoxy resin with an equivalent weight of 910 is allowed
to react in N-methylpyrrolidine with a 2,4-toluene diisocyanate
blocked at one end with 2-ethylhexanol, and dimethylamine
is then added to react with the epoxide residues. The resin
is dispersed with acetic acid in water. Binders that can be
deposited cathodically offer improved protection against corrosion and d o not attack phosphate protective films as readily
as anionic binders. [DOS 2252536; PPG Industries, Inc.,
Pittsburgh, Pa. (USA)]
[PR 190 IE-W]
BOOK R E V I E W S
Einfuhrung in die Physik (Introduction to Physics). By R.
Fleischrnann. Verlag Chemie GmbH-Physik Verlag, Weinheim/Bergstr. 1973. 1st ed., xviii, 677 pp., 436 figures, 60
tables, bound D M 65.--.
This book, which is based on a series of lectures, resembles
Pohl‘s textbook in that it introduces and explains the essential
physical concepts with the aid of briefly described experiments.
Care is taken to distinguish clearly between quantities that
should be kept conceptually separate, such as the inertial
mass and the gravitational mass. This and other similar didactic measures may enable the author to achieve his aim of
guarding the beginner (to whom the book is primarily
addressed) as far as possible against the usual errors.
Special mention should be made here of the consistent references to the dimensions to be used and to the units, which
are listed in a separate section at the end of the book. Here
one also finds very useful tables for the conversion of units,
for conversion to moving reference systems according to theory
of relativity, for the mathematical use of scalars, of vectors
and tensors, etc.
As far as the choice of subject matter is concerned, the book
confines itself mainly to physical processes that can be approximately described and understood in terms of a mental picture.
This does not mean, for example, that the wave nature of
material particles is ignored, but the predominantly theoretical
conclusion from wave and quantum mechanics (Schrodinger
equation) play only a minor part in the book. In the field
of thermodynamics, one of the concepts that are not easy
to grasp and d o not lend themselves to mental imagery is
entropy; the discussions on this topic are probably not easy
for the beginner to understand. On the other hand, there
is a brief but nevertheless sufficiently informative description
of the areas of physics that are vital to modern investigations
in nuclear physics.
The physical laws are examined in the book with the aid
ofa variety of numerical examples. The examples unfortunately
contain a number of discrepancies, which are particularly
422
likely to trouble the student since he will probably assume
that the values were obtained by some conversion or other,
whereas they are actually simple errors of calculation. Discrepancies of this kind are also to be found in the tables, but
these can easily be eliminated in a second edition.
Klaus Schufer [NB 195 IE]
Boranes in Organic Chemistry. By H . C. Brown. Cornell University Press, Ithaca-London
1972, 1st ed., xiv, 462 pp.,
numerous figures, bound S 24.50.
The new “H.C.B.” is based on a series of lectures given at
Cornell University in the autumn of 1969. The book is both
more and less than its title suggests. Not only are the “Prolog”
and the “Epilog” autobiographical in content, but the “life
history” is also reflected by the choice of material and the
emphasis in the presentation of all the other chapters. Thus
the author’s work on free radicals, steric effects, and (how
could it be otherwise?) even on the problem of non-classical
carbenium ions have been incorporated into the “boron book”.
Everything is considered from the view-point of the old campaigner. This is naturally also true of the actual “main”
chapters, the “Selective Reductions”, the “Hydroboration”,
and the “Organoboranes” and their reactions, among which
the reactions with carbon monoxide, the alkyiations, and freeradical reactions receive sections to themselves. The author’s
priorities are illustrated by the following example: The varied
reaction of carbon monoxide with organoboranes, which has
been dealt with by the author in numerous publications, is
given 15 subsections with no fewer than 28 pages. The oxidation of organoboranes with N-oxides is not mentioned once
in the entire book, though three sections covering 6 pages
are devoted to the oxidations of the organoboranes.
The reader will derive special enjoyment and many a smile
from numerous passages. The author expresses himself in
so many places in his own characteristic manner. The descriptions ofthe ways in which results were achieved are interesting.
Anqrw. Chmz inirrnai. Edif. f VM. I3 ( 1 9 7 4 ) 1 No. 6
Документ
Категория
Без категории
Просмотров
0
Размер файла
128 Кб
Теги
introduction, die, book, fleischmann, physics, physik, einfhrung, review
1/--страниц
Пожаловаться на содержимое документа