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Cluster chemistry is one of the recent, exciting areas of Inorganic Chemistry. The occurence of molecular clusters, like fullerene C60, constitutes a fundamental feature midway between the chemistry of isolated chemical compounds and that of the elements. Main features of the Cluster Chemistry of both main group and transition metal elements are treated in this book. The author highlights aspects releated to the synthesis, the structure, the special bonding and the reactivity of these species. The book is written as a textbook for senior undergraduate and postgraduate students. References in tables andillustrations permit the reader to reach relevant original information. Professor Gonzalez-Moraga fills a demand for a publication appropriate for dissemination and specially for teaching this exciting subject. From the Contents: Current Concepts in Modern Chemistry - Transition Metal Cluster Chemistry - Main Group-Transition Metal Mixed Clusters - Cluster Compounds of the Main Group Elements - Synthetic Analogues of the Active Sites of Iron-Sulfur Proteins.
Increasing attention has been focused on biodiversity in recent years, based on a number of arguments to justify the conservation of the world's flora and fauna. Such arguments may be economic - that species may have potential for food or medicine - or ecological - that the extinction of any species affects the overall ecological balance. Little attention, however, has been focused on which groups have the greatest impact on maintaining diversity. Hymenoptera is one of these groups. It not only forms a major component of diversity itself, but is vital in sustaining diversity in other groups. Hymenoptera species (bees, wasps, ants and sawflies) are major plant pollinators, seed dispersers and parasitoids and predators of other arthropods (and hence important in biological control). This volume therefore tackles an important subject and concentrates on three key issues: how species of Hymenoptera affect diversity in other organisms; whether Hymenoptera is a group prone to extinction; and the consequences if Hymenoptera species are differentially removed from terrestrial ecosystems. The book is essential reading for entomologists and those concerned with biodiversity and conservation.
Orbital Tumors, 2nd edition discusses advances in orbital disease and their treatment, offering readers an up-to-date, single volume reference for orbital tumors. Divided into two parts, this book covers everything from advances in oncogenesis and its relationship to orbital tumors, to medical genetics and the role of imaging in diagnosis of orbital tumors. Additionally, new information on incidence and behavior of tumors resulting from environmental and social trends is included. Written and edited by leaders in the fields of ophthalmology and oncology, Orbital Tumors, 2nd edition builds upon the first edition, proving to be a useful reference for orbital specialists and of significant interest for everyone dealing with orbital pathology from a clinical and scientific point of view.
resource-exploitation dynamics are emphasized a single comprehensive volume that provides a systematic and rigorous overview of state-of-the-art critical-geographical scholarship on resources contributions from leading voices and emerging researchers who draw on diverse theoretical and methodological traditions and whose expertise spans a wide variety of resource sectors and world regions
In this detailed investigation of the natural variation, geographical distribution, and modern taxonomy of the American Fragaria strawberry species, three species with four subspecies each and two hybrid species are recognized taxonomically. The author also discusses the phylogenetic relationships of the diploid and octoploid species and subspecies and their postpleistocene migration. The American octoploid Fragaria species are known as the ancestors of the large-fruited garden strawberries, so this study is of great horticultural interest and may contribute to the preservation of these species and their further use in strawberry breeding.
After a brief review of quantum mechanics and a summary of conventional atomic theory, H. Friedrich discusses the structure of atomic spectra on the basis of quantum defect theory, which is treated for the first time at such a basic level in a textbook. Special attention is given to highly excited states and to the influence of external fields, which can cause intricate and interesting effects in seemingly simple systems. After a chapter on reaction theory the final chapter treats special topics such as multiphoton absorption and chaos. The book contains the kind of advanced quantum mechanics needed for practical applications in modern atomic physics. The presentation is kept deliberately simple and avoids abstract formalism as far as possible.
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