Resultados de Pesquisa

INGLÊS

Electron Paramagnetic Resonance Of D Transition Metal Compounds

de D. Collison e F.E. Mabbs

~~75,51€~~ 60,41€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 Electron paramagnetic resonance (epr) spectroscopy is a sensitive and versatile method of studying paramagnets, which is finding increasing use in chemistry, biochemistry, earth and materials sciences. The technique is treated both qualitatively and quantitatively, with a progressive increase in sophistication in each succeeding chapter. Following a general introductory chapter, the first half of the book deals with single unpaired electron systems and considers both metal and ligand Zeeman, hyperfine and quadrupole interactions. The simulation of these spectra is discussed, followed by the relationship between spin-Hamiltonian parameters and models of the electronic structures of paramagnets. The second half of the book treats multiple unpaired electron systems using the same philosophy. An introduction to the epr properties of cluster compounds and of extended exchanging systems is also given. There is a chapter on linewidths and lineshapes, and an extensive appendix containing much additional information. A wide-ranging library of simulated and experimental spectra is given, as well as graphical data which should aid spectrum interpretation. Each chapter contains key references and there is a substantial subject and keyword index. This book is designed to teach epr spectroscopy to students without any previous knowledge of the technique. However, it will also be extremely useful to researchers dealing with paramagnetic d transition metals.
INGLÊS

Chemistry Of Inorganic Ring Systems

~~75,51€~~ 60,41€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 The present volume considers the most recent developments in the chemistry of cyclic inorganic and organoelement compounds. Nineteen of the 22 chapters are based on invited and other lectures presented at the 6th International Symposium on Inorganic Ring Systems held in Berlin on August 18-22, 1991.Main group compounds dominate the content from boron via carbon, silicon, germanium, tin, nitrogen, phosphorus and arsenic, to sulfur and selenium. The book is organized by element, moving from left to right in the main groups of the Periodic Table, followed by one chapter each on bonding and nomenclature of ring molecules. The list of contributors comprises distinguished scientists from 8 countries.
INGLÊS

Selected Topics In High Temperature Chemistry - Defect Chemistry Of Solids

~~58,29€~~ 46,63€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 The properties of materials at high temperature play a vital role in their processing and practical use. The real properties of materials at elevated temperatures are very often governed by defects in their structure. Lattice defects may consist of point defects like vacancies, interstitial atoms or substituted atoms. These classes are discussed in general and specifically for oxides, nitrides, carbides and sulfides. Defect aggregates, shear structures and adaptive structures are also described. Special attention is paid to hydrogen defects which seem to play an important role in several materials.Defects in solids lead to transport properties such as diffusion and conductivity. These themes are thoroughly treated in this book, with examples from various materials being provided. Special attention is paid to the transport properties of grain boundaries. In high temperature corrosion and other types of oxidation, the diffusion of atoms through the reaction products is often the rate limiting step of the reaction. This book takes the reader from the theoretical treatment of defects to applications in high temperature corrosion. Reactions between metals and pure oxygen lead to the formation of oxides on the surface, and the reaction rates may often be related to the diffusion coefficients of the oxide. However, in practical use alloys are subjected to other severe gaseous atmospheres which may often lead to accelerated attack on the material. The severest condition, namely where a salt deposit is combined with oxidizing gases, is called hot corrosion. This and other types of corrosion are also covered. Finally, a chapter is devoted to the prevention of corrosive attack on materials by the addition of rare earth metals.The book has been published in honour of Professor Per Kofstad on the occasion of his 60th birthday. Professor Kofstad has for many years been active in the field of high temperature chemistry in all its aspects, from basic and theoretical work to its application in high temperature corrosion of metals and alloys. The various chapters have been contributed by his friends and colleagues, all of whom are international experts in the field.
INGLÊS

Molybdenum - An Outline Of Its Chemistry And Uses

~~75,51€~~ 60,41€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 Molybdenum is an element with an extremely rich and interesting chemistry having very versatile applications in various fields of human activity. It is used extensively in metallurgical applications. Because of their anti-wear properties, molybdenum compounds find wide applications as lubricants - particularly in extreme or hostile environmental situations. Many molybdates and heteropolymolybdates are white and therefore used as pigments. In addition, they are non-toxic and act as efficient corrosion inhibitors and smoke suppressants. Hydroprocessing of petroleum is one of the largest industries employing heterogeneous catalysts. Molybdenum catalysts have shown great promise in the liquefaction of coal and this may develop into one of its most important catalytic uses. The use of molybdenum compounds in homogeneous catalysis is also significant.Three important classes of molybdenum compounds in the solid state are reviewed, viz., oxides, sulphides and halides. The role of molybdenum in inorganic catalysis and enzymes receives prominent mention because of their impact on the progress of science and technology. Further biochemical and enzymic factors are discussed in separate chapters and their reaction to agriculture and animal husbandry.A new classification of covalent compounds which abandons the traditional oxidation state concept allows a powerful approach to the organisation of the complex and rich chemistry of molybdenum. Dramatic colour diagrams of abundances of molybdenum compounds provide broad insights into the important features and trends in the chemistry of molybdenum including reactivity and mechanism.The book is intended for use mainly as a research monograph by the many workers who may encounter molybdenum chemistry or who are looking for its application and potential uses in different technological fields. However, it will also serve as an advanced text for university lecturers and postgraduate students interested in inorganic, physical and industrial chemistry, chemical technology or biochemistry and biotechnology.
INGLÊS

Structure And Chemistry Of The Apatites And Other Calcium Orthophosphates

de J.C. Elliott

~~58,29€~~ 46,63€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 This text describes the structures and structural relationships of the calcium orthophosphates, including the apatites. Their preparation, crystal growth and dissolution, chemical reactions, IR, Raman and NMR spectra and various physical properties are discussed.
INGLÊS

Graphite Fluorides

de H. Touhara, N. Watanabe e T. Nakajima

~~58,29€~~ 46,63€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 This volume reviews the preparation, structures, physicochemical properties and applications of graphite fluorides, mainly based on the results obtained by the authors. Their interest in graphite fluorides stemmed from research on the ``anode effect'''', in electrolytic production of fluorine gas in KF.2HF melt using carbon electrodes. The formation of a thin graphite fluoride film on carbon anodes made it difficult to continue the electrolysis of KF.2HF at a high current density. To elucidate this phenomenon studies on graphite fluoride were initiated. In the course of these systematic studies, the use of graphite fluoride in high-energy batteries became successful: a new graphite fluoride (C<INF>2</INF>F)<INF>n</INF> was found; and another fluorineographite intercalation compound with ionic bonding, C<INF>x</INF>F, was synthesized. During this research it was established that C<INF>x</INF>F is closely associated with the ``anode effect''''. The book will be of interest to all those involved in the study and research of graphite fluorides, particularly fluorine chemists, electrochemists, and fluorine and battery companies.
INGLÊS

Sulfur - Its Significance For Chemistry, For The Geo-, Bio-, And Cosmosphere And Technology

~~75,51€~~ 60,41€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 Sulfur: Its Significance for Chemistry, for the Geo-, Bio- and Cosmosphere and Technology focuses on the significance of sulfur for chemistry, geosphere, biosphere, cosmosphere, and technology. Topics covered range from the geochemistry and natural cycle of sulfur to the role of sulfur in "black powder". Organometallic sulfur compounds, thiolates, and the spectroscopic effects of sulfur chemistry are also discussed. Comprised of 21 chapters, this volume begins with an introduction to elemental sulfur and related homocyclic compounds and ions, focusing on their preparation, molecular and crystal structures, molecular spectra, and thermodynamic properties. Subsequent chapters deal with the origin and natural cycle of sulfur in the earth''s crust; the role of sulfur in the reactions of exploding gunpowder; the use of sulfur in artwork; and developments in the field of organic sulfur chemistry. The catalytic properties of metal complexes of sulfur and sulfur-nitrogen compounds are also examined, along with the synthetic aspects of sulfido-complexes of molybdenum and tungsten. The final section is devoted to the role of sulfur in microbiology, biochemistry, and medicine. This monograph will be useful to students, practitioners, and researchers in the field of inorganic chemistry, as well as those who are interested in sulfur and its compounds.
INGLÊS

Chemistry Of The Platinum Group Metals - Recent Developments

~~75,51€~~ 60,41€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 The work is aimed at scientists in universities and in industry using any of the six platinum group metals in research. It will be useful for those studying the compounds of the metals themselves, and those considering to use either the metals or their complexes and catalysts in their experimental work.
INGLÊS

Chemistry Of Artificial Lighting Devices - Lamps, Phosphors And Cathode Ray Tubes

de Richard C. Ropp

~~75,51€~~ 60,41€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 Covers both the early use of artificial lighting and manufacturing methods concerning incandescent and fluorescent lamps. This work discusses the protocols for manufacture of fluorescent lamp phosphors and those used in cathode ray tubes. It offers a description of the formulations and methodology for manufacturing all known phosphors.
INGLÊS

Contemporary Aspects Of Boron: Chemistry And Biological Applications

de Hijazi Abu Ali, Morris Srebnik e Valery M Dembitsky

~~318,00€~~ 254,40€ 20% IMEDIATO

DISPONIBILIDADE IMEDIATA

 Highlights the biological activity and applications of boron containing compounds. This book surveys the general features of the subject, while exploring novel strategies for preparing certain chemical and natural boron products that are of significant substance in medicinal chemistry. It presents concepts and methods in simple scientific terms.
INGLÊS

Structure And Chemistry Of The Apatites And Other Calcium Orthophosphates

de J.C. (The London Hospital Medical College, Department Of Child Dental Health, London, Uk) Elliott

ESGOTADO OU NÃO DISPONÍVEL

 This text describes the structures and structural relationships of the calcium orthophosphates, including the apatites. Their preparation, crystal growth and dissolution, chemical reactions, IR, Raman and NMR spectra and various physical properties are discussed.
INGLÊS

The Chemistry Of Artificial Lighting Devices - Lamps, Phosphors And Cathode Ray Tubes

de Richard C. (Frsc, Faic &Bcfe, Warren, New Jersey, Usa) Ropp

ESGOTADO OU NÃO DISPONÍVEL

 Covers both the early use of artificial lighting and manufacturing methods concerning incandescent and fluorescent lamps. This work discusses the protocols for manufacture of fluorescent lamp phosphors and those used in cathode ray tubes. It offers a description of the formulations and methodology for manufacturing all known phosphors.
INGLÊS

Chemistry Of The Platinum Group Metals - Recent Developments

ESGOTADO OU NÃO DISPONÍVEL

 The work is aimed at scientists in universities and in industry using any of the six platinum group metals in research. It will be useful for those studying the compounds of the metals themselves, and those considering to use either the metals or their complexes and catalysts in their experimental work.

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