springer us mär 2012 (367 risultati)

Taschenbuch. Condizione: Neu. Neuware -The present work is an attempt to provide a systematic treatment of genetic linkage in diploid heredity. Part A presents a general account of statistical methods which can be brought to bear on the problem. The primary emphasis is on the practical aspects of estimation. A large proportion, if not the majority, of mutant genes fail to match up to 'textbook' genes-with faultless segregation ratios and expression-yet, these are the materials with which the practical researcher has to cope. For this reason, it is important to know how to deal with the assortment of genes which may display significant deviations from expectation. Part B examines the accumulated data on linkage for most of the laboratory mammals and provides a comprehensive and up-to-date survey. The need for a critical review has often been expressed and it is hoped that the present analysis will fill the gap. The volume of material is probably the most important in the animal kingdom other than that for Drosophila species.

Taschenbuch. Condizione: Neu. Neuware -This book sets out to provide a useful directory to writers, reviewers, and citizens interested in the environmental impact statement (EIS) process in the United States. Although several 'environmental' directories address a narrow portion of EIS subject matter, there is no single directory that covers the wide range of agencies and organizations involved in the EIS process. Therefore, the purpose of this directory is to bring EIS-related agencies and organizations into one comprehensive reference book. EIS writing and reviewing can be improved by providing practioners with a directory that puts them quickly in touch with the national EIS net work. At the present time, practioners must rely on their personal, and sometimes, limited network of agencies and organizations for the exchange of information. The EIS Directory quickly connects EIS-related agencies and organizations throughout the United States at the national, regional, state, and local levels. The EIS Directory is a compilation of directories provided by members of the EIS community. A written survey of over five hundred agencies and or ganizations was made in 1980. The response to the survey provided a wide range of in-house directories. This book contains approximately 4,000 entries developed from over 300 documents. This book was written in the hope that it will help people communicate more easi1y--u1timately improving the quality of EIS decision making. I re alize the limitations of this initial edition and accept the challenge of providing a more effective reference tool in future editions.

Taschenbuch. Condizione: Neu. Neuware - The present work is an attempt to provide a systematic treatment of genetic linkage in diploid heredity. Part A presents a general account of statistical methods which can be brought to bear on the problem. The primary emphasis is on the practical aspects of estimation. A large proportion, if not the majority, of mutant genes fail to match up to 'textbook' genes-with faultless segregation ratios and expression-yet, these are the materials with which the practical researcher has to cope. For this reason, it is important to know how to deal with the assortment of genes which may display significant deviations from expectation. Part B examines the accumulated data on linkage for most of the laboratory mammals and provides a comprehensive and up-to-date survey. The need for a critical review has often been expressed and it is hoped that the present analysis will fill the gap. The volume of material is probably the most important in the animal kingdom other than that for Drosophila species.

Taschenbuch. Condizione: Neu. Neuware - This book sets out to provide a useful directory to writers, reviewers, and citizens interested in the environmental impact statement (EIS) process in the United States. Although several 'environmental' directories address a narrow portion of EIS subject matter, there is no single directory that covers the wide range of agencies and organizations involved in the EIS process. Therefore, the purpose of this directory is to bring EIS-related agencies and organizations into one comprehensive reference book. EIS writing and reviewing can be improved by providing practioners with a directory that puts them quickly in touch with the national EIS net work. At the present time, practioners must rely on their personal, and sometimes, limited network of agencies and organizations for the exchange of information. The EIS Directory quickly connects EIS-related agencies and organizations throughout the United States at the national, regional, state, and local levels. The EIS Directory is a compilation of directories provided by members of the EIS community. A written survey of over five hundred agencies and or ganizations was made in 1980. The response to the survey provided a wide range of in-house directories. This book contains approximately 4,000 entries developed from over 300 documents. This book was written in the hope that it will help people communicate more easi1y--u1timately improving the quality of EIS decision making. I re alize the limitations of this initial edition and accept the challenge of providing a more effective reference tool in future editions.

Taschenbuch. Condizione: Neu. Neuware - Although thousands of articles and hundreds of books on aging have been published, only a small percentage of this material has dealt with anatomy, particularly at the fine structural level. It was with this in mind that Aging and Cell Structure was conceived. Volume 1 of Aging and Cell Structure was published in 1981 and represented a current compilation of information, concentrating at the electron microscopic level, on morphological changes which occur in cells and tissues as they age. The present volume completes the two-volume set. While Volume 1 highlighted structural changes occurring in the aging nervous system, Volume 2 centers its efforts on studies of in vitro aging. Chapters on other subjects are included as well. These include age-related changes seen in neuromuscular junctions, oral tissues, and the pancreas. Although these two volumes represent a very small part of the published infor mation on experimental gerontology, their approach is rather unique because they focus on anatomy, perhaps the most basic of all the biomedical sciences. Because many dif ferent tissue types are examined, we begin to see recurrent, definitive patterns in the aging cell which may not be fully apparent from studies taking one cell type at a time. This becomes even more evident in the present volume where changes seen in popula tions of cells grown in culture-isolated from hormones or nervous impulses from other body areas-are found to be similar to those changes found in vivo.

Taschenbuch. Condizione: Neu. Neuware - This volume contains the contributions to a symposium held at Gatlinburg, Tennessee, under the auspices of the Oak Ridge National Laboratory, in April, 1971. In the past, these proceedings had appeared as a supplement to the Journal of Cellular Physiology. Due to the nature of the subject ma terial and the relevance of the topic of the symposium to the readers of BIOMEMBRANES, it was agreed by the organizers of the symposium to publish the contributions of the partici pants as a separate volume in BIOMEMBRANES. It had been originally envisaged that, from time to time, the proceedings of a conference whose subject matter was directly related to the scope of this series would be included. The proceedings are being published exactly as they have been submitted to the Editor without the usual editorial re V1S10n. This is being done to increase the speed of publica tion. For the same rOeason, no indices have been provided since the time needed to prepare an adequate subject index would have unnecessarily delayed publication. Included in the proceedings are short reports of a number of workshops that were held during the conference. The editor has received excellent cooperation from both the organizers of the conference and the several contributors to this volume. If the experiment is a success, it is thanks to their promptness.

Taschenbuch. Condizione: Neu. Neuware - The goals of the science of photobiology can be divided into four categories: to develop (I) ways to optimize the beneficial effects of light on man and his environment, (2) methods to protect organisms, including man, from the detrimental effects of light, (3) photochemical tools for use in studies of life processes, and (4) photochemical therapies in medicine. To achieve these goals will require the knowledgeable collaboration of biologists, chemists, engineers, mathematicians, physicians, and physicists; because photobiology is a truly multidisciplinary science. While a multi disciplinary science is more intellectually demanding, it also has a greater potential for unexpected breakthroughs that can occur when data from several areas of science are integrated into new concepts for theoretical or practical use. Photochemical and Photobiological Reviews continues to provide in depth coverage of the many specialty areas of photobiology. It is hoped that these reviews will provide an important service to the younger scientists in the field and to senior scientists in related fields, because they provide a ready access to the recent literature in the field, and more importantly, they frequently offer a critical evaluation of the direction that the field is taking, or suggest a redirection when appropriate. Kendric C. Smith Editor vii Contents v Contents of Earlier Volumes . . Preface . . vii Chapter 1. The Activation of Enzymes with Light . .

Taschenbuch. Condizione: Neu. Neuware - Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) \* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 22 (thesis year 1977) a total of 10,658 theses titles from 28 Canadian and 227 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 22 reports theses submitted in 1977, on occasion, certain universities do report theses submitted in previous years but not reported at the time.

Taschenbuch. Condizione: Neu. Neuware - The time seems ripe for a critical compendium of that segment of the biological universe we call viruses. Virology, as a science, having only recently passed through its descriptive phase of naming and num bering, has probably reached that stage at which relatively few new truly new-viruses will be discovered. Triggered by the intellectual probes and techniques of molecular biology, genetics, biochemical cytology, and high-resolution microscopy and spectroscopy, the field has experienced a genuine information explosion. Few serious attempts have so far been made to chronicle these events. This comprehensive series, which will comprise some 6000 pages in a total of about 22 volumes, represents a commitment by a large group of active investigators to analyze, digest, and expostulate on the great mass of data relating to viruses, much of which is now amorphous and disjointed and scattered throughout a wide literature. In this way, we hope to place the entire field in perspective as well as to develop an invaluable reference and sourcebook for researchers and students at all levels. This series is designed as a continuum that can be entered anywhere but which also provides a logical progression of developing facts and integrated concepts.

Taschenbuch. Condizione: Neu. Neuware - If an ion in a crystal is replaced by an impurity ion with a different charge, compensation for the charge difference must be accomplished. This is usually done by an intrinsic defect, i. e. a lattice vacancy or interstitial host ion, in such a way to balance the excess or deficit of charge. The introduction of cation vacan cies along with divalent cation impurities in alkali halides is a familiar example. If these crystals are carefully annealed, nearly all of the compensating defects migrate to the impurity ions to form impurity-defect complexes. It is the behavior of these complexes that are the principal concern in this paper. Almost invariably such complexes are dipolar in character, and when subjected to an electric or mechanical stress field, they will tend to realign to an orienta tion of lower energy provided the thermal activation is sufficiently great. If the complex consists of an impurity-vacancy couple, re orientation may occur either by the vacancy moving around the impu rity or by an exchange of positions of the partners. In general the activation energy for these two distinct reorientation paths is different. If the complex consists of an impurity-interstitial couple, interchange of positions is unlikely and reorientation is considered to occur exclusively by the motion of the interstitial around the vacancy.

Taschenbuch. Condizione: Neu. Neuware - Spectroscopic Tricks was introduced in 1959 as a special section in the journal Applied Spectroscopy. Its purpose was to provide a means for communicating information on new devices, modifica tions of existing apparatuses, and other items of this nature of interest to the working spectroscopist. That it has proved valuable is indicated by the continuing publication of this section now under the title of Spectroscopic Techniques. However, the use fulness of these contributions, scattered through the many issues of the journal, diminishes as time passes since the reader must consult the annual indices of many volumes of the journal to find the contri bution that may hold the solution to his problem. The collection of the contributions into a single volume for the years 1959 through 1965 made it easier for the reader to make this search. The success of the first volume has prompted the continuation of these collec tions. The contributions in this second volume are selected from the the years 1966 through 1969. They are arranged in the same manner as in the previous volume according to the area of spectroscopy. Those concerned with the same devices are placed together so that the reader can compare them readily. To maintain the advantages inherent in a single collection of articles, the subject index for this volume includes all the entries and page references from the original volume. Both author and journal indices are are also provided, the latter citing the original Applied Spectroscopy edition.

Taschenbuch. Condizione: Neu. Neuware - In a previous volume, Families as Learning Environments for Children, we presented a series of chapters that dealt with research programs on the role of families as learning environments for children. Those studies were based on empirical data and sought answers to basic research questions, with no explicit concern for the application of the results to practical problems. Rather, their purpose was to contribute primarily to conceptualization, research methodology, and psychological theory. Now, in this volume, we turn our attention to intervention-efforts to modify the way a family develops. As in our previous conference, the participants of the working conference on which the present volume is based are research scientists and scholars interested in application. This group is distinct from practitioners, however, whose primary focus is service; participants in this conference have as their primary interest research into the problems of processes of application. Applied professional issues concerning the lives of families come from many varied sources, from some that are distant and impersonal (e. g. , the law) to direct face-to-face efforts (educators, therapists). The variety of sources and types of applications are eloquent testimony to the degree to which families are subject to a host of societal forces whose implicit or explicit aim is to modify family functioning. For example, some educators may wish to alter family child-rearing patterns to enhance child development; the clinician seeks to help families come to terms and to cope with a schizophrenic child. The list can be extended.

Taschenbuch. Condizione: Neu. Neuware - These volumes contain the invited and contributed talks of the first general Conference of the Condensed Matter Division of the European Physical Society, which took place at the campus of the University of Antwerpen.

Taschenbuch. Condizione: Neu. Neuware - The first and foremost concrete fact which every one will affirm to belong to his inner experience is the fact that consciousness of some sort goes on. I -William James, 1893 We are witnessing today a mounting interest among behavioral and biological scientists in problems long recognized as central to our understanding of human nature, yet until recently considered out of the bounds of scientific psychology and physiology. Sometimes thrown into the heading of 'altered states of consciousness,' this growing research bears directly upon such time-honored questions as the nature of conscious experience, the mind-body relationship, and volition. If one broadly views this research as encompassing the two interrelated areas of consciousness and self-regulation, one can find many relevant contemporary examples of creative and experimentally sophisticated approaches, including research on the regulation of perception and sensory experience, attention, imagery and thinking, emotion and pain; hypnosis and meditation; biofeedback and volun tary control; hemispheric asymmetry and specialization of brain func tion; drug-induced subjective states; and biological rhythms. Because the material is spread over many different kinds of publications and disciplines, it is difficult for anyone person to keep fully abreast of the significant advances. The overall aim of the new Plenum Series in Consciousness and Self-Regulation: Advances in Research is to provide a scholarly forum for discussing integration of these diverse areas by presenting some of the best current research and theory.

Taschenbuch. Condizione: Neu. Neuware - The growth of neurochemistry. molecular biology, and biochemical genetics has led to a burgeoning of new information relevant to the pathogenesis of brain dysfunction. This explosion of exciting new information is crying out for collation and meaningful synthesis. In its totality, it defies systematic summa tion, and, of course, no one author can cope. Thus invitations for contributions were given to various experts in areas which are under active investigation, of current neurological interest, and pregnant. Although this project is relatively comprehensive, by dint of size. other topics might have been included; the selection was solely my responsibility. I believe systematic summation a virtual impossibility-indeed, hardly worth the effort. The attempt to assemble all of the sections involved in a large treatise with multiple authors inevitably results in untoward delays due to the difference in the rate at which various authors work. Therefore, the following strategy has been adopted: multiple small volumes and a relatively flexible format, with publication in order of receipt and as soon as enough chapters are assembled to make publication practical and economical. In this way, the time lag between the ideas and their emergence in print is the shortest.

Taschenbuch. Condizione: Neu. Neuware - This volume represents the proceedings of a NATO Advanced Study Institute on Amino Acids as Chemical Transmitters, which took ~lace at Spatind Hotel in Norway, August 14-21, 1977. The meeting is related to two previous meetings on metabolic compart mentation in the brain. The first of these meetings took place at Rockefeller Foundation, Bellagio, Italy, July 11-16, 1971 and the proceedings, Metabolic Compartmentation in Brain, were edited by R. Balazs and J. E. Cremer and published by Macmillan in 1973. The second meeting was an Advanced Study Institute on Metabolic Com partmentation and Neurotransmission Relation to Brain Structure and Function, which was held in Oxford, September 1-8, 1974. The proceedings were edited by S. Berl, D. D. Clarke and D. Schneider and published as Volume 6 of the NATO ASI Life Science series by Plenum Press. The object of the present meeting was to review and discuss the present status of amino acids as chemical transmitters. Several issues such as electrophysiological response, localization, synthe sis, release and receptor binding of transmitter candidates were discussed. The possible morphological correlates to these func tions were also reviewed. During the meeting 24 leading papers were given. In addition, several of the participants presented important new findings during the discussion. Some of these have been included as short reports. The main financial support was obtained from NATO, Scientific Affairs Division.

Taschenbuch. Condizione: Neu. Neuware - About 21 years ago prenatal diagnosis became part of the physician's diagnostic armamentarium against genetic defects. My first monograph in 1973 (The Prenatal Diagnosis of Hereditary Disorders) critically assessed early progress and enunciated basic principles in the systematic approach to prenatal genetic diagnosis. Six years later and under the current title, a subsequent volume provided the first major reference source on this subject. The present second (effectively third) edition, which was urged in view of the excellent reception of the two earlier volumes, reflects the remarkable growth of this new discipline and points to significant and exciting future developments. Notwithstanding these advances, the use of the new tools and techniques for the benefit of at-risk parents has taken many more years than most anticipated. Key factors have been the lack of teaching of human genetics in medical schools in the preceding decades and the difficulty of educating practicing physicians in a new scientific disci pline. Even today the teaching of genetics in medical schools leaves much to be desired and this will further delay the introduction of newer genetic advances to the bedside.

Taschenbuch. Condizione: Neu. Neuware -This book sets out to provide a useful directory to writers, reviewers, and citizens interested in the environmental impact statement (EIS) process in the United States. Although several 'environmental' directories address a narrow portion of EIS subject matter, there is no single directory that covers the wide range of agencies and organizations involved in the EIS process. Therefore, the purpose of this directory is to bring EIS-related agencies and organizations into one comprehensive reference book. EIS writing and reviewing can be improved by providing practioners with a directory that puts them quickly in touch with the national EIS net work. At the present time, practioners must rely on their personal, and sometimes, limited network of agencies and organizations for the exchange of information. The EIS Directory quickly connects EIS-related agencies and organizations throughout the United States at the national, regional, state, and local levels. The EIS Directory is a compilation of directories provided by members of the EIS community. A written survey of over five hundred agencies and or ganizations was made in 1980. The response to the survey provided a wide range of in-house directories. This book contains approximately 4,000 entries developed from over 300 documents. This book was written in the hope that it will help people communicate more easi1y--u1timately improving the quality of EIS decision making. I re alize the limitations of this initial edition and accept the challenge of providing a more effective reference tool in future editions. 384 pp. Englisch.

Taschenbuch. Condizione: Neu. Neuware - The Fermentation and Biotechnology Division of the American Chemical Society annually organizes symposia on topics vital to the applied biosciences. In September, 1969, a symposium was held on 'Properties and Products of Algae'. Papers presented at this symposium covered numerous aspects of algal culture with emphasis on the special properties and products produced by algae of economic interest. The art of handling algae is rapidly becoming a science. The papers presented herein are part of man's attempt to understand the contribution of the algae to man's world. v Contributors to this Volume: H. H. Blecker Department of Chemistry University of Michigan Flint College Flint, Michigan Y. S. Chiu Biochemical Engineering Faculty of Engineering Science University of Western Ontario London, Ontario N. L. Clesceri Rensselaer Polytechnic Institute Troy, New York Thomas H. Haines The City College of the City University of New York New York, New York Raymond W. Holton Department of Botany University of Tennessee Knoxville, Tennessee Eva Knettig Biochemical Engineering Faculty of Engineering Science University of Western Ontario London, Ontario P. J. Lavin Albany County Health Department Albany, New York vii viii CONTRIBUTORS G. C. McDonald Albany County Sewer District Albany, New York Edward J. Schantz Department of the Army Fort Detrick, Maryland R. D. Spear Rensselaer Polytechnic Institute Troy, New York B. Volesky Biochemical Engineering Faculty of Engineering Science University of Western Ontario London, Ontario Varley E. Wiedeman Department of Biology University of Louisville Louisville, Kentucky J. E.

Taschenbuch. Condizione: Neu. Neuware - The possibility of initiating chemical reactions by high-intensity laser exci tation has captured the imagination of chemists and physicists as well as of industrial scientists and the scientifically informed public in general ever since the laser first became available. Initially, great hopes were held that laser-induced chemistry would revolutionize synthetic chemistry, making possible 'bond-specific' or 'mode-specific' reactions that were impos sible to achieve under thermal equilibrium conditions. Indeed, some of the early work in this area, typically employing high-power continuous-wave sources, was interpreted in just this way. With further investigation, however, a more conservative picture has emerged, with the laser taking its place as one of a number of available methods for initiation of high-energy chemical transformations. Unlike a number of these methods, such as flash photolysis, shock tubes, and electron-beam radiolysis, the laser is capable of a high degree of spatial and molecular localization of deposited energy, which in turn is reflected in such applications as isotope enrichment or localized surface treatments. The use of lasers to initiate chemical processes has led to the discovery of several distinctly new molecular phenomena, foremost among which is that of multiple-photon excitation and dissociation of polyatomic molecules. This research area has received the greatest attention thus far and forms the focus of the present volume.

Taschenbuch. Condizione: Neu. Neuware - Cytologic diagnosis by examination of exfoliated cells in serous cavity fluids is one of the most challenging areas in clinical cytopathology. Almost 20% of the effusions examined are directly or indirectly related to the presence of malignant disease, with carcinoma of the lung as the most common underlying culprit.This volume published in the Essentials in Cytopathology book series will fulfill the need for an easy-to-use and authoritative synopsis of site specific topics in cytopathology. These guide books fit into the lab coat pocket, ideal for portability and quick reference. Each volume is heavily illustrated with a full color art program, while the text follows a user-friendly outline format.

Taschenbuch. Condizione: Neu. Neuware - JOSEPH MEITES The idea that the endocrine system is involved in aging processes is as old as the beginnings of endocrinology. The first endocrine experiment related to aging was reported by Brown-Sequard, who is usually re garded as the 'father of endocrinology. ' In 1889, at the age of 72 years, he reported that he had succeeded in rejuvenating himself by injections of testicular extracts from dogs and guinea pigs. Although the favorable effects observed may have been due mainly to the powers of auto suggestion, his reports created a considerable interest in endocrinology and its relation to aging, and eventually led to the use of estrogens for treating certain pre-and postmenopausal symptoms in women, and an drogens for treating some symptoms in aging men. Up to about the 1960's, the relatively few studies on endocrine-aging relationships dealt mainly with changes in weight and histological appearance of endocrine organs in aging animals and human subjects, and included a limited number of measurements of endocrine function by bioassays and chem ical (for steroids) procedures. Within these limitations, gerontological investigators were unable to establish any definite relationships between endocrine functions and aging processes, with the exception of the con nection between reproductive decline and gonadal and pituitary activity.

Taschenbuch. Condizione: Neu. Neuware - Volume 4 of the Encyclopedia of the Alkaloids covers the literature to the end of 1981 and includes those compounds which have been discovered since Volume 3 was published in 1977. There is also a small number of entries giving recently determined structure or addi tional information regarding alkaloids given in the preceding three volumes. It is a great pleasure to thank the staff of the John Rylands Science Library of the Univer sity of Manchester for kindly providing me with access to the literature on this subject. Woodhouses, JOHN S. GLASBY Manchester, England May, 1982 Contents A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251 B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31O G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339 H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358 I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361 J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367 K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368 L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369 M . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370 Formula Index. . . . . . . . . . . . . . . . . . . . 371 A ACETYLALLOYOHIMBINE (Alkaloid NRB6) C23H2SN203 M. p. Indefinite I I OAc The root bark of Rauwolfia nitida yields this yohimbine-type alkaloid which has been ob tained as an off-white amorphous powder having no definite melting point. The base is lae 2 vorotatory with a specific rotation of [aJ5 -89° (c 0. 01, CHCI ) and gives an ultraviolet 3 spectrum in MeOH with absorption maxima at 225,284 and 290 nm. The structure has been established from chemical and spectroscopic analysis. M. A. Amer, W. E. Court, Phytochem. , 20,2569 (1981) 14-ACETYLBROWNINE ___ :(OMe M. p.

Taschenbuch. Condizione: Neu. Neuware - In this book I have tried to bring together the major developments in the study of insect populations in tropical environments. In some ways, this task has been a difficult one because conceptually it is virtually impossible to limit a discussion of insect ecology to the tropics, since the same concepts, theories, and hypoth eses concerning the mechanisms by which habitats support insect populations often apply both to temperate and to tropical regions. Thus one might argue effectively that a book such as Peter Price's Insect Ecology represents a more comprehensive treatment of insect ecology, including the tropical aspects. Yet because there has been a tremendous amount of new study on insects in the tropics in recent years, and because there has also been a strong historical interest in tropical insects, judging from early museum expeditions and medically and agriculturally oriented studies of insects in the New and Old World tropics, I believe there is a place for a book dealing almost exclusively with tropical insects. But logically so, such a book by necessity incorporates data and informa tion from Temperate Zone studies, if for no other reason than because insights into the properties of tropical environments often emerge from compariso'ns of species, communities, or faunas between temperate and tropical regions. An understanding of insect populations in the tropics cannot be divorced from a consideration of Temperate Zone populations.

Taschenbuch. Condizione: Neu. Neuware - Volume 3 of the Encyclopedia of the Alkaloids covers the literature to the end of October 1976 and includes a large number of these compounds which have been discovered since the first two volumes were published in 1975. There are some entries where recent work has resulted in new structures being put forward or where additional details regarding compounds have been provided. Additional references to compounds given in the first two volumes are marked with an asterisk. The opportunity has also been taken to provide a formula index covering all three volumes. It is a great pleasure to thank Academician Professor S. Yu. Yunusov of the Institute of Chemistry at the University of Tashkent, Uzbekistan, for pointing out a number of errors in the two previous volumes and for kindly providing me with invaluable detailed information of the alkaloids which have been isolated and studied by Soviet chemists over many years.

Taschenbuch. Condizione: Neu. Neuware - In recent years, an ever-increasing amount of research has been conducted on the physico-chemical basis of the origin and evolution of life, or protobiology. Many questions are raised in this endeavor: What research methodology should be employed What sort of dependable facts are available as a firm frame of reference upon which the physico-chemical origin of life or protolife could be examined Is the origin due exclusively to chance events If not, what is then responsible for the origin What physical reality underlies the evolutionarily selective process leading to the origin What role does variation assume and how is it generated in the course of evolution Many research workers have pursued various avenues toward answering the stated questions. Among them, we believe Sidney W. Fox has been playing a very unique and pivotal role over the past quarter of a century, presiding over 240 man-years or more of labo ratory work. His laboratory syntheses of thermal proteins called proteinoids and proteinoid micro spheres have emphasized the prin ciple of the self-sequencing of amino acids as a key concept of protobiological synthesis. The significance of his contribution is seen in presenting the experimental evidence that the origin of life is largely due to nonrandom events. This discovery marks a new epoch in the conceptual development of studying the origin of life by focusing on the molecular processes that underlied the emergence and evolution of protobiological information.

Taschenbuch. Condizione: Neu. Neuware - The primary metabolism of protobionts was probably based on the electron transfer reactions regulated by catalysts or photo sensitizing pigments. The action of photoreceptive pigments was inevitable in the case of electron transfer leading to light energy storage in the reaction products. The primitive tetrapyrrolic pig ments formed abiogenically (porphin, chlorin) as well as their more complicated biogenic analogs (chlorophylls) are capable of photo sensitizing electron transfer in systems, having various degrees of molecular complexity. The inorganic photosensitizers (titanium dioxide. zinc oxide. etc.). being excited in the near ultraviolet. are able to perform the same reactions as porphyrins--electron transfer from donor to acceptor molecule (including photoreduction of viologens) or water molecule photooxidation (oxygen liberation). coupled with reduction of ferric compounds and quinones. The in organic photosensitizers are not used in biological evolution; actually the inorganic ions entered into tetrapyrrolic cycle. form ing effective photocatalysts. Inclusion of pigments into primary membranes led to elaborated coupling between pigments and enzymatic systems. The involvement of the excited pigments into the biocata lytic electron transfer chain was prerequisite to effective func tion of photosynthetic organisms. REFERENCES 1. Oparin. A. I., 'Origin of Life on Earth,' Izd. AN SSSR. Moscow. 1957. 2. Gaffron, H., in: 'Horizons in Biochemistry' (Kasha. M and Pullmann, B eds.), p. 59. Academic Press, New York. 1962. 3. Calvin. M 'Chemical Evolution,' C1arendon Press, Oxford. 1969. 4. Pasynsky. A. G . and Pav1ovskaya. T. E . Uspekhii khimii 33, 1198 (1964).

Taschenbuch. Condizione: Neu. Neuware - This treatise is an outgrowth of a series of seminars and tutorials on selected legal aspects of geology that were offered to several generations of undergraduate students at Lawrence University. The offerings were in response to a keen interest in how the law and legal institutions relate to the professional geologist. Much of the student interest was undoubtedly sparked by the legal controversies as sociated with the 'environmental movement' that became so active during the 1970s and continues today to look to the law for the resolution of conflicting goals. Other students were interested in the role allocated to law by society in general, or were simply curious about law as a profession. Existing published material did not meet my needs, and I had to rely on 'handouts' summarizing legal principles, reported appellate cases, and guest lectures from the county bar association. The more formally prepared course materials were edited by practicing attorneys and scholars in academia who encouraged me to seek a publisher who might make the materials available to a broader audience-an audience that might include not only students of the law but also the professional geologist, geological engineers, planners, policy makers, and attorneys, whether in industry, government, education, or private practice, who want to know more about the relationship between law and geology.

Taschenbuch. Condizione: Neu. Neuware - Nearly two hundred years ago Crawford and Cruickshank, surgeons and chemists in the Royal Artillery, reported the occurrence of a 'new earth' in the mines at the Scottish village of Strontian. Humphrey Davy, following the advice of Berzelius, isolated stable strontium in 1808 along with other alkali earth metals. It was not until 1883 that physiological effects of stable strontium were first recognized by none other than Sidney Ringer in his experiments on frog heart. The medicinal use of strontium salts was first described in Squire's Companion in 1894. Subsequently, strontium was introduced into the Pharma copeias of Great Britain, United States, France, Germany, Spain, Italy, and Mexico and was used in treatment of a variety of disease. s, clearly without detailed knowledge of its actions. It is hoped that this handbook will provide a sound basis for further research on stable strontium and the establishment of the levels of intake, necessary or desirable, in different pathophysiological conditions. The objective of this publication was to assemble a comprehensive collection of essays on stable strontium which review the respective areas of research as well as present original data. I consider myself fortunate to have been able to work with the contributors of these essays. It is obvious that this type of book should be interdisciplinary in nature owing to the necessity of examining each subject from the viewpoint of different disciplines.

Taschenbuch. Condizione: Neu. Neuware - The concept for a treatise covering selected natural polymer systems was initiated during a national meeting in cell biology in 1978. The challenge to the editor was to organize a book dealing principally but not exclusively with cellulose. A brief background may help to provide the reader with information to understand the reasons for the specific selections within this volume. better During the past decade, we have witnessed significant changes in the sciences as well as the day-to-day life styles of our citizens. It will not be forgotten that during the early seventies, a significant change was to take many Americans by surprise. The oil embargo on The United States caused unexpected shortages of fuels. The long gasoline lines impressed in the minds of Americans that our energy-rich future with non-renewable resources is limited. The modelling of ecosystems, population growth, urban development, etc., have continued to raise our awareness that life on earth, including renewable resources, is indeed fragile. Contrary to popular belief, even wood and wood products are not limitless.