вход по аккаунту


Book Review Elektronenanlagerungs-Massenspektrographie organischer Substanzen (Electron Addition Mass Spectography of Organic Substances). By M.von Ardenne K.Steinfelder and R

код для вставкиСкачать
dichloride, to a melt of at least one excess aromatic diamine,
e.g. m-phenylenediamine, at a high temperature. After the
reaction, the product is dissolved in a conventional solvent
for aromatic polyamides, such as dimethylacetamide or
N-methyl-2-pyrrolidone,at least one aromatic dicarboxylic
acid halide, e.g. isophthaloyl chloride, is added to this
solution between 0 and -2O”C, and the mixture is polycondensed to completion at this temperature to obtain a
high molecular weight product. [DOS 2062774; Farbwerke Hoechst AG, FrankfurtlMain-Hochst]
[PR 58 IE-0]
The cis isomer of disadium epoxysuccinate (I) can take the
place of sodium tripolyphosphate, which has until now been
extensively used as a builder in detergents and cleaning
mixtures, but which should no longer be used because of
its adverse effect on bodies of water. Since (I j contains no
plant nutrients such as phosphorus or nitrogen, unlike
polyphosphate, it has no eutrophic effect on fresh-water
flora, and in particular it does not lead to excessive growth
of algae. The natural development of the fauna and flora of
the water bodies is not disturbed by ( I ) , so that the detergents present in washing agents can be biologically degraded. 20-45 wt.% of the detergent mixture consists of
alkaline sodium salts, of which 40-85 wt.% preferably
consists of (1). The full action of (1j is achieved in washing
baths at pH 9. (I) has sufficient thermal stability for use
at normal washing temperatures. Its prime cost is very
little above the cost of tripolyphosphate. ( I ) is prepared
by epoxidation of maleic acid with 30% H 2 0 2at 60°C in
aqueous solution in the presence of sodium tungstate.
[DOS 2160908 ; Produits Chimiques Pechiney-SaintGobain, Paris]
[PR 81 IE-V]
To prepare Ndisubstituted glycines, amino alcohof such
as triethanolamine are oxidized with 0, in the presence
of Pt, possibly on a catalyst support and possibly in the
presence of a solvent at 25-1 10°C. The glycines obtained
in this way are used for organic syntheses, as textile auxiliaries, and particularly as builders for detergents. [DOS
2103724; Chemische Werke Hub, Marl]
[PR 110 IE-B]
Elektronenanlagerung-Massenspektrographie organkcher
Substanzen (Electron Addition Mass Spectrography of
Organic Substances). By M. von Ardenne, K . Steinfelder,
and R. Tummler. Springer-Verlag, Berlin-HeidelbergNew York 1971. 1st ed., viii, 403 pp., 109 figs., stitched
DM 68,.
The present book sums up several years’ work by the
authors in the development and application of electron
addition (EA) mass spectrography in the Manfred von
Ardenne Research Institute, Dresden.
The fundamentals of the method are presented in the
first part of the book, and are followed by a description
of the equipment and general questions of sample preparation, measuring technique, and evaluation of the spectra.
After a discussion of the ionization mechanisms, there
is a short comparison of the EA mass spectra of negative
and positive ions.
In the second part of the book, after dealing with a number
of possible applications, mainly in the chemistry of natural
products, the authors present a clear description of the
classes of substances that have been investigated so far
and of the decomposition rules that have been explained.
The book ends with extensive tables containing the EA
mass-spectroscopic data known at present.
The book should be equally valuable to the advanced
chemist and to the specialist in the field of mass spectrometry. As an additional method, EA mass spectrography
will undoubtedly find much more frequent use in analytical
chemistry in the future for the solution of special problems,
despite the need for larger samples than in electron bombardment mass spectrometry.
Gerd Remberg [NB 136 IE]
Real-Lexikon der Medizim (Encyclopedia of Medicine). 6
volumes in a loose-leaf system. Edited by G. Thiele
and H . Walter. Urban & Schwarzenberg, Miinchen. Vol.
3 (F-Hyperl) 1969/70, ii, 804 pp., 140.- DM. Vol. 4
(Hypern-Melusinidae) 1971/72, viii, 802 pp., numerous
figures and tables, 160.- DM.
Two thirds of the
have now been completed.
They show that the work is not only important for doctors,
but will be of use also (and perhaps especially) to those
who have a sort of scientific point of contact with medicine
on the chemical side. Its content is lexical in the best
sensd, i. e. for each concept one not only finds a definition,
but also learns something about the factors that make
the object in question or the associated phenomenon
important in medicine. In some cases, however, the necessary concisenessof expression leads to impenetrable brevity,
which makes the explanation understandable only to those
who are already fundamentally in possession of the information, but which may nevertheless serve as an indication
to the novice that he still has something to learn here
(as under the keyword “gamma globulins”). A literature
reference to open the door to further studies would have
been useful in this connection, but perhaps this is too
Cf. Angew. Chem. internat. Edit. 8, 222 (1969).
Angew. Chem. internat. Edit.
Val. I2 (1973) No. 6
Без категории
Размер файла
122 Кб
elektronenanlagerungs, ardenne, spectography, steinfelder, organiz, electro, massenspektrographie, mass, book, substances, additional, substanzen, review, von, organischer
Пожаловаться на содержимое документа