A Configurational Model of Matter (1973)

The book we are presenting to American and other English speaking readers is a review of the work on the electron struc ture of elements, alloys, and compounds, which was started back in the fifties. This work gradually grew into a system of ideas on the electron structure of condensed matter which is now known as the configurational model. This model is based on the assumption of the preferential formation of the most stable configurations of the localized va lence electrons in condensed matter. The existence of these stable configurations and the exchange of electrons with the de localized (collective-state) subsystem determines those prop erties which are related to the electron structure. The conclu sions which can be drawn from the applications of the configura tional model are only qualitative but they explain quite clearly the nature of various properties of condensed matter, and they are helpful in the search for materials with specified properties. The American edition has been corrected and supplemented in many minor respects. Moreover, the opportunity was taken to revise thoroughly the section on the fundamentals of the configura tional model in the light of the latest theoretical developments. other parts of the book have been shortened to eliminate material which is not of fundamental significance or has not yet been de veloped sufficiently fully.

A Configurational Model of Matter (Studies in Soviet Science)

Science & Math

Samsonov, G. V.

Pryadko, I. F.

Pryadko, L. F.

Tybulewicz, Albin, trans

Mathematics

Consultants Bureau

<p>This book deals with the physico-chemical principles underlying ion exchange sorption and chromatog~aphy. It does not cover in any detail the experimental and instrumental aspects of practical separations. The author has developed the subject starting from the synthesis and structure of the ion exchangers employed, through the thermodynamics of sorption selectivity and the equilibrium dynamics of ion sorption, to the kinetics and dynamics of non-equilibrium ion-exchange systems. Throughout this treatment the additional factors arising from the exchange of complex organic ions, as opposed to simple mineral ones, have been interwoven. The author has stressed the application in the separation of organic ions with biological activity, many of which are synthesized in biotechnological processes, and in view of this he uses the expression "physico-chemical biotechnology." In practice, however, his in-depth treatment is applicable to any charged organic species with multifunction ality and/or high molecular weight, and is therefore by no means restricted to biologically active materials, and certainly not to those molecules from a biotechnological source. Bearing this in mind, the text has a much wider value than the title may convey.</p>

Ion-Exchange Sorption and Preparative Chromatography of Biologically Active Molecules (Macromolecular Compounds)

Chemistry

Plenum

Springer

<p>Rare metals play an important role in the development of major branches of industry, such as vacuum equipment, semiconductor electronics, nuclear power and rocket production, as well as in the production of special steels and hard, refractory and corrosion-resistant alloys. Rapid development and improvement in the production of rare metals took place in the ten years which have elapsed since the publication of the first edition of this book. These ten years have witnessed the beginning of large-scale production of titanium, zirconium, and germanium, and a significant increase in the production volume; new, improved methods for the separation and purification of metals and compounds (ion-exchange, extraction, crystallization methods) as well as arc and electron-beam melting processes for metals were developed. This made it necessary to rewrite most of this book. In view of the growing importance of the lanthanides and rhenium, chapters on these metals were also included. At the same time, we decided to dispense with the chapters on lead and antimony, since these are not usually listed as rare metals. In describing the metallurgy of each metal, much attention was paid to its physicochemical nature and to the practical operations involved in the main technological processes for the production of its chemical compounds and of the pure metal. This book is a textbook for students specializing in the metallurgy of the rare metals. It is assumed that the student is familiar with the physicochemical fundamentals of metallurgy, ore dressing, metallurgical furnaces, and processes and apparatus used in extractive metallurgy. The description of standard equipment (leaching apparatus, thickeners, filters, comminution installations, etc.) has accordingly been omitted. The references are grouped together at the end of the book.</p>

Metallurgy of Rare Metals (Materials Science and Technology)

Engineering & Transportation

Zelikman, A. N.

Krein, O. E.

Engineering

Nova Science Pub Inc

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