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Author: Karl-Heinz Tytko
Publisher: Springer Science & Business Media
ISBN: 3662091712
Category : Science
Languages : en
Pages : 300
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Book Description
The present volume continues the edition of a number of supplement volumes dealing with the elements tungsten and molybdenum. The compounds of molybdenum with noble gases, hydrogen and oxygen, anhydrous antimony-, bismuth- and alkalimolybdates as well as compounds of molybdenum oxides with oxides of other metals have been described in volume B 1 and B 2. The oxide hydrates and the molybdate ions are dealt with in volume B 3a. The volume molybdenum supplement B 4 contains the hydrous oxocompounds of the metals Sb to Cr with molybdenum. Description of the element molybdenum is covered by the supplement volumes A 1, A 2a, A 2b and A3. In the first part of this volume the description of the oxomolybdenum (VI) species in aqueous solution, which was started in the "Molybdenum" Supplement Volume B 3a, 1987, is continued and completed with the Section on the chemical reactions. After a general overview on the chemical properties of the molybdate ions in aqueous solution, the typical reactions are treated in separate chapters, e.g., reduction, precipitation, formation of heteropolymolybdate ions, reactions with organic ligands, etc. The second part of this volume deals with the oxomolybdenum (VI) species in nonaqueous (organic) solvents. Most of the polymeric species are different from those occurring in aqueous media. The last Section on the oxospecies in solution describes the species in melts such as alkali chlorides, nitrates, and chromates. Finally, the peroxomolybdate ions are treated in a separate Section.
Author: Karl-Heinz Tytko
Publisher: Springer Science & Business Media
ISBN: 3662091712
Category : Science
Languages : en
Pages : 300
Get Book
Book Description
The present volume continues the edition of a number of supplement volumes dealing with the elements tungsten and molybdenum. The compounds of molybdenum with noble gases, hydrogen and oxygen, anhydrous antimony-, bismuth- and alkalimolybdates as well as compounds of molybdenum oxides with oxides of other metals have been described in volume B 1 and B 2. The oxide hydrates and the molybdate ions are dealt with in volume B 3a. The volume molybdenum supplement B 4 contains the hydrous oxocompounds of the metals Sb to Cr with molybdenum. Description of the element molybdenum is covered by the supplement volumes A 1, A 2a, A 2b and A3. In the first part of this volume the description of the oxomolybdenum (VI) species in aqueous solution, which was started in the "Molybdenum" Supplement Volume B 3a, 1987, is continued and completed with the Section on the chemical reactions. After a general overview on the chemical properties of the molybdate ions in aqueous solution, the typical reactions are treated in separate chapters, e.g., reduction, precipitation, formation of heteropolymolybdate ions, reactions with organic ligands, etc. The second part of this volume deals with the oxomolybdenum (VI) species in nonaqueous (organic) solvents. Most of the polymeric species are different from those occurring in aqueous media. The last Section on the oxospecies in solution describes the species in melts such as alkali chlorides, nitrates, and chromates. Finally, the peroxomolybdate ions are treated in a separate Section.
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309445310
Category : Medical
Languages : en
Pages : 264
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Book Description
The decay product of the medical isotope molybdenum-99 (Mo-99), technetium-99m (Tc-99m), and associated medical isotopes iodine-131 (I-131) and xenon-133 (Xe-133) are used worldwide for medical diagnostic imaging or therapy. The United States consumes about half of the world's supply of Mo-99, but there has been no domestic (i.e., U.S.-based) production of this isotope since the late 1980s. The United States imports Mo-99 for domestic use from Australia, Canada, Europe, and South Africa. Mo-99 and Tc-99m cannot be stockpiled for use because of their short half-lives. Consequently, they must be routinely produced and delivered to medical imaging centers. Almost all Mo-99 for medical use is produced by irradiating highly enriched uranium (HEU) targets in research reactors, several of which are over 50 years old and are approaching the end of their operating lives. Unanticipated and extended shutdowns of some of these old reactors have resulted in severe Mo-99 supply shortages in the United States and other countries. Some of these shortages have disrupted the delivery of medical care. Molybdenum-99 for Medical Imaging examines the production and utilization of Mo-99 and associated medical isotopes, and provides recommendations for medical use.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309130395
Category : Medical
Languages : en
Pages : 220
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Book Description
This book is the product of a congressionally mandated study to examine the feasibility of eliminating the use of highly enriched uranium (HEU2) in reactor fuel, reactor targets, and medical isotope production facilities. The book focuses primarily on the use of HEU for the production of the medical isotope molybdenum-99 (Mo-99), whose decay product, technetium-99m3 (Tc-99m), is used in the majority of medical diagnostic imaging procedures in the United States, and secondarily on the use of HEU for research and test reactor fuel. The supply of Mo-99 in the U.S. is likely to be unreliable until newer production sources come online. The reliability of the current supply system is an important medical isotope concern; this book concludes that achieving a cost difference of less than 10 percent in facilities that will need to convert from HEU- to LEU-based Mo-99 production is much less important than is reliability of supply.
Author: Umesh C. Gupta
Publisher: Cambridge University Press
ISBN: 0521571219
Category : Science
Languages : en
Pages : 288
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Book Description
This book condenses all the information available on the subject of molybdenum as it relates to soils, crops and livestock.
Author: Hermann Jehn
Publisher: Springer Science & Business Media
ISBN: 3662063271
Category : Science
Languages : en
Pages : 407
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Book Description
In the first part of this volume the nitrogen-containing compounds of molybdenum are described. The Mo-N system shows that M0 N and MoN are the stable nitrides. MOlybdenum 2 metal dissolves nitrogen to some extent but only at high temperatures. To get better insight into the reactions between nitrogen and molybdenum, the solubility, diffusion, adsorption and desorption phenomena, and ion bombardment are included in the section of the Mo-N system. M0 N has a large range of homogeneity toward lower nitrogen concentrations. The black 2 hexagonal MoN has only a narrow range of homogeneity. In addition some molybdenum compounds containing nitrogen and oxygen are known. The second part contains a full description of the compounds of molybdenum with fluorine. The fluorides MoF n with n ~ 2 are metastable while those with n = 3 to 6 are stable and have been observed in the Mo-F system. Pure MoF can exist without traces of oxygen, in co nt rast 3 to earlier assumptions. MoF was unambigously prepared and characterized in 1957. Its crystal 4 structure is still unknown. MoF is often contaminated with the oxide fluoride MoOF and it is s 4 difficult to remove. Even sm all amounts affect the properties of MoF . MoF , which is liquid at s 6 room temperature and solidifies to a "plastic" crystal modification below ca. 17SC, is the most investigated of all the molybdenum fluorides.
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 030946627X
Category : Medical
Languages : en
Pages : 87
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Book Description
Participants of the July 17-18, 2017, symposium titled Opportunities and Approaches for Supplying Molybdenum-99 and Associated Medical Isotopes to Global Markets examined current trends in molybdenum-99 production, prospects for new global supplies, and technical, economic, regulatory, and other considerations for supplying molybdenum-99 to global markets. This publication summarizes the presentations and discussions from the symposium.
Author: Hartmut Katscher
Publisher: Springer Science & Business Media
ISBN: 3662078368
Category : Science
Languages : en
Pages : 384
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Book Description
Author: E.R. Braithwaite
Publisher: Elsevier
ISBN: 1483290891
Category : Science
Languages : en
Pages : 662
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Book Description
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.
Author: William E. Newton
Publisher: Springer Science & Business Media
ISBN: 146159149X
Category : Science
Languages : en
Pages : 419
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Book Description
In retrospect, it was obvious that we were both, quite inde pendently, contemplating a conference on the role of molybdenum in biology and related chemistry. At the time though, the meeting of minds on this matter was quite surprising. Although this subject has been treated in previous meetings within the overall context of, say, magnetic resonance or nitrogen fixation, it was apparent to us both that research in molybdenum-containing enzymes and molyb denum chemistry had progressed rapidly in the last several years. Jointly, we decided to organize the first meeting on Molybdenum Chemistry of Biological Significance which was held at the Hotel Lake Biwa, Shiga, Japan, on April 10-13, 1979. This volume con stitutes the Proceedings of that international conference and covers the broad spectrum of interests from enzymes to coordination chemistry. It should serve not only as a source of new information on the latest research results in this area and as a useful ref erence tool, but should also allow a newcomer or other peripherally interested researcher to become conversant very rapidly with the "state-of-the-art" in this specialized and important area of research. The conference was sponsored by the Japan Society for the Promotion of Science, the Japan World Exposition Commemerative Fund the Yamada Science Foundation, the Nissan Science Foundation, the Chemical Society of Japan (Kinki Regional Office) and the Agri cultural Chemical Society of Japan (Kansai Branch). We thank these organizations sincerely for their interest and generosity.
Author: Michael P. Coughlan
Publisher: Elsevier
ISBN: 1483189120
Category : Science
Languages : en
Pages : 590
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Book Description
Molybdenum and Molybdenum-Containing Enzymes is a collection of papers that deals with the various concerns with molybdenum-containing enzymes. The text first covers the organometallic chemistry of molybdenum, and then proceeds to tackling molybdenum-containing enzymes, such as xanthine oxidase, aldehyde oxidase, and sulphite oxidase. The text also discusses the advancement in the understanding of molybdenum-containing enzymes. The remaining chapters deal with the genetics of molybdoenzymes and the nutritional aspects of molybdenum. The book will be of great use to students, researchers, and practitioners of biochemistry.
