# Book Review Fortschritte der Strukturforschung mit Beugungsmethoden (Adnances in Sturctural Analysis using Diffraction Methods). Edited by R. Brill

код для вставкиСкачатьall the chapters have been completely revised, e.g. the chapter o n emulsions has increased from 30 to 56 pp. and the chapter on ointments includes references to silicone bases. hydrocortisone ointments, e f c . Modern techniques in such classical fields as the preparation of pastes, powders, soaps, suppositories, pills, syrups, capsules, tablets, and dragees are dealt with. The particularly important practical section o n tabletting faults provides an excellent basic introduction to the methodology. Treatments more suitable for a textbook are to be desired in some sections, e.g. that on solutions for injection. The sections o n the preparation of n a t u r a l drugs is particularly valuable, since their therapeutic use has been greatly undervalued in face of the abundance of chemical pharmaceuticals. The same applies to the section o n homeopathic pharmacy. The completely new illustrations might have been supplemented by technological flow-sheets for the preparation of pharmaceuticals. This is a book which will be useful not only to the student of pharmacy, but also to practising chemists in the pharmaceutical industry. S . Balke [ N B 219197 IE] Fortschritte der Strukturforschung mit Beugungsmethoden (Advances in Structural Analysis using Diffraction Methods). Edited by R. Brill. Vol. I. Friedrich Vieweg & Sohn, Braunschweig; Interscience Publishers, a division of John Wiley & Sons, New York-London 1964. 1st Edit., VIII + 221 pp., 102 figs., linen D M 48.- (about S 12.25). The appearance of this new series on “advances in structural analysis using diffraction methods” has closed a gap between the numerous original publications in journals and extensive monographs on the subject. I n this first volume of the series, individual topics selected from this vast field are discussed by acknowledged experts ( G . E. Boron, B . K. Vainshtein, J . Karfe, W. Hoppe, H . Jagodzinski, and A. Niggli). In addition to two articles on the application of neutron and electron diffraction to the determination of structures, particularly the determination of the positions of hydrogen atoms, there is a review of methods for measuring phase angles. Two further sections are devoted to thermal background variations and to the interpretation of the diffuse interferences occurring in crystals with dislocations. Finally, a short discourse on some symmetry problems is given. Every user of this book will be grateful for the instructive examples and mathematical derivations included. The numerous references given will also prove a great aid for the perusal of original publications G . Hribermehl [NB 245/103 IE] Chemie und Technologie aliphatischer f luororganischer Verbindungen (The Chemistry andTechnology of Aliphatic Organofluorine Compounds). By D . Osteroth. Collection of Chemical and Chemical Technological Reviews. New Series 59. Founded by F. B. Altrerzs, edited by R. Pnmmerer, L. Birkofer, and F. Goubeau. Ferdinand Enke Verlag, Stuttgart 1964. 1st Edit., VIII, 195 pp., 8 figs., 41 tables, linen D M 58. - (about $15.00). The author has attempted to provide a survey of the development of the chemistry and technology of aliphatic fluorine compounds up to the year 1961. The book deals with syntheses of fluorinated hydrocarbons, alcohols, ethers, aldehydes, ketones, carboxylic acids, and compounds containing nitrogen and sulfur, as well as with their chemical reactions. I n view of the rapid development and vastness of fluorine chemistry, n o single author can reasonably be expected t o give a complete critical account of the whole field. The reviewer thus looked in vain among the literature cited for numerous references to methods of preparative importance.For example, the synthesis of monofluorocarboxylic acid esters or monofluoroketonas is covered better by the publications of E. D . Bergmonn. Fluorination by perchloryl fluoride is not mentioned, nor are cycloaliphatic fluorine compounds, such as the pharmaceutically important fluoro steroids. Interactions of N-bromoacetamide and hydrogen fluoride with olefins, and Angew. Chem. intrrimt. Edit. 1 Vol. 4 (1965) No. 2 reactions with difluorocarbene or fluorochlorocarbene have also been overlooked. Reaction mechanisms are hardly touched upon, but patents and technological aspects are more fully covered. H . Machleidt [ N B 233190 IE] Mathematik fur Naturwissenschaftler und Chemiker (Mathematics for Scientists and Chemists). By H. Sirk and M . Draeger. Completely revised by M. Draeger. Verlag Theodor Steinkopff, Dresden-Leipzig 1963. 9th Edit., xii + 385 pp., 132 figs., linen DM 25.20 (about $6.50) The value of“Sirk” is demonstrated by its many editions, and now it has appeared in a new edition completely revised by M. Drrrcger. Despite radical alterations, the character of the book has been maintained, and o n the whole, the presentation - as well as the typographical appearance - of the volume are clearer. This has been achieved partly by a reorganization of the material. The elementary mathematics hitherto appended at the end now appears together with one section each on combinations and determinants in the new first part of the book. Infinite series and approximation procedures are discussed in a new fifth part. The practical examples in thermodynamics are now gathered together in a single chapter in the third part (functions with several variables). I n addition, even more effort has been made here than in previous editions to conveying a lucid and intelligible appreciation of mathematical concepts in order to simplify understanding of the methods described. In this connection, the section o n the basic number e, the detailed discussion of the geometrical interpretation of simple, first-orderdifferential equation as a vector field and of its general integral as a oneparameter series of curves, theclesr treatment of the method of the integrating factors, and the section applied to differentiating between the concepts of “necessary” and “sufficient” conditions can be cited as examples. Furthermore, the illustrative examples given in the text are supplemented by numerous problems whose solutions are given in the appendix. There is a brief summary at the end of each chapter to assist rapid orientation. A few sections had to be shortened to make room for these welcome additions and innovations. Thus, treatment of the method for cd!CUhting errors by the law of least squares and of Taylor series has been omitted, and elimination of the section on the Schrodinger equation has consequently led to the lack of mention of boundary conditions, eigenvalues, and eigenfunctions of a differential equation. In view of the increasing importance of electronic computers, a somewhat more extensive treatment of iteration procedures would have been desirable. This new edition of “Sirk/Draeger” is an exceptionally lucid and well-planned introduction to the fundamentals of higher mathematics and can therefore be earnestly recommended to every student of chemistry. Here not only will he find the mathematical basis of classical physical chemistry, but he can also acquire the background which will facilitate his explorations into specialized fields of modern physical and M . Klessinger [NB 2SO/lOS IE] Carl Wilhelm Scheele. Apotheker - Chemiker - Entdecker. By 0 . Zekert. Vol. 27 of the series “Grosse Naturforscher” edited by H . Degen. Wissenschaftliche Verlagsgeseilschaft m.b.H., Stuttgart 1963. 1st Edit., 142 pp., 23 illustrations, linen DM 15.80 (about S4.00). Carl Wilhelm Scheele (1742-1786) was one of the most prominent chemists during the transition from the phlogistic to the antiphlogistic eras; his biography and achievements are recounted in the present volume. Many of the results of his investigations can be regarded as the beginnings from which organic chemistrydeveloped into an independent science. Even though Wdhfer’s synthesis of urea is generally accepted as the starting point of synthetic organic chemistry nowadays, it should not be forgotten that, during his investigations of “the coloring material i n Berlin blue”, Scheele prepared hydrogen 175

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