Springer springer mär 2012 (Más de 2900 resultados)

Taschenbuch. Condición: Neu. Neuware -Ten years ago the first International Symposium on Computer and Information Sciences (COINS-63) was held at Northwestern University. Since that time, computer and information sciences have witnessed a great intensification of research and education. The activities in this field have been significantly broadened and enriched. During this ten-year period, we have organized four COINS symposia to provide a forum for promoting com munication among scientists, engineers, and educators in the computer and information science field and to act as a catalyzer for stimulating creative thinking within the community of information processing. The COINS-72 symposium, which took place in Miami Beach on December 14--16,1972, under the cosponsorship of the U.S. Army Research Office, the Atomic Energy Commission, and the University of Florida, is the fourth International Symposium on Computer and Information Sciences. The theme of this COINS symposium is information systems. This theme has been selected for the following reasons: Information systems have offered widespread applications in education, government, industry, and science. The bulk of research in computer and information science is now geared to the development of improved information systems. A major portion of software engineering is concerned with computer software and sophisticated information system design. It seems logical that a symposium on information systems should follow the preceding software engineering conference.…

Taschenbuch. Condición: Neu. Neuware -The economics of forestry has always fascinated me as one of the most brain-taxing cases in economics. As an investment forestry is different from many other projects as it has unusually long gestation periods. For example, in the United Kingdom it takes over 40 years to grow coniferous and over 100 years for deciduous timber. These long gestation periods make it very clear how import ant are the magnitude of the discount rate and the method of discounting in the evaluation of investment projects. Any errors in these will misguide investors in forestry one way or the other. In addition, forestry redistributes income between gener ations. Its long gestation periods make it obvious that more than one generation will be involved in any venture. When we plant trees we know that the bulk of the benefits will be captured by future generations. Conversely, when we fell trees we reap the benefit of projects which were established in the past, mostly by generations who are long gone. So far most economists have devoted their time and energy to analysing income distribution in an intragenerational context, and this is a very sensitive and controversial issue. After all, most revolutions have taken place because of the uneven income distribution which was oppressive for the majority. Forestry helps us to study the case from the viewpoint of different generations. Forestry necessitates estimating timber prices a long time ahead.…

Taschenbuch. Condición: 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. Condición: Neu. Neuware -Presently, and in the past, the predominant investigative emphasis among research workers in arteriosclerosis has been on plasma and arterial lipids. Recent data from a number of laboratories suggest that arterial mesenchyme is of considerable importance in the pathogenesis and fate of arteriosclerotic lesions. The significance of some of these observations made it clear that there was need for intensified research on the connective tissue components of the arteriosclerotic lesion and that arteriosclerosis research workers could benefit from a more comprehensive view of the subject. Because of their experience in the field of arteriosclerosis and their interest in stimulating new directions for research on the lesion, the Committee on Coronary Artery Lesions and Myocardial Infarctions of the Council on Arteriosclerosis, American Heart Association, planned an International Workshop on Arterial Mesenchyme and Arteriosclerosis. The Workshop brought together scientists expert in connective tissue research and research on arteriosclerosis who presented the current status of knowledge in their areas of expertise. The Workshop was held April 2-3, 1973 at the Royal Orleans Hotel, New Orleans, Louisiana and was attended by more than 170 people. The twenty papers and discussions presented in this volume summarize the proceedings of the Workshop and represent a comprehensive review of the role of arterial mesenchyme in arteriosclerosis.…

Taschenbuch. Condición: Neu. Neuware -This book contains the Proceedings of the S~cond U. S. -Japan Seminar on Learning Control and Intelligent Control. The seminar, held at Gainesville, Florida, from October 22 to 26, 1973, was sponsored by the U. S. -Japan Cooperative Science Program, jointly supported by the National Science Foundation and the Japan Society for the Promotion of Science. The full texts of the twenty-one presented papers are included. The papers cover a variety of topics related to learning control and intelligent control, ranging from pattern recognition to system identification, from learning control to intelligent robots. During the past decade, there has been a considerable increase of interest in problems of machine learning, systems which exhibit learning behavior. In designing a system, if the a priori infor mation required is unknown or incompletely known, one approach is to design a system which is capable of learning the unknown infor mation during its operation. The learned information will then be used to improve the system's performance. This approach has been used in the design of pattern recognition systems, automatic control systems and system identification algorithms. If we naturally extend our goal to the design of systems which will behave more and more intelligently, learning systems research is only a preliminary step towards a general concept of integrated intelligent systems. One example of this class of systems is the intelligent robot, which integrates pattern recognition. learning and problem-solving into one intelligent system.…

Taschenbuch. Condición: Neu. Neuware -The papers contained in this volume were presented at the third meeting of the International Organization for the Study of Human Development, held in Madrid on September 21-24, 1975. The primary objective of the Organization is to bring together persons from a wide range of disciplines concerned with problems of human development. The first meeting typified this interdisciplinary approach by concentrating on problems relating to genetic expression. The second meeting considered milk and lactation from a variety of viewpoints, including those of the molecular biologist and the geographer. The present meeting deals with nutrition as an integral part of human life as well as a fundamental discipline in the area of biology. The editors wish to thank Professors Ettore Rossi and Fabio Sereni and Dr. Frank Falkner for their invaluable assistance in planning this conference, and would particularly like to express their appreciation toward Professor Cipriano Canosa and his staff for their gracious and hospitable assist ance in providing facilities and accommodations for the participants. The editorial assistance of Mary Lynn Hendrix has aided us in our contribution; and the secretarial support of Millie Fazzi and Natalie Stover is gratefully acknowledged.…

Taschenbuch. Condición: 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. Condición: Neu. Neuware - The European Organization for Research into Cancer Treatment (OERTC), founded in 1962 initially under the name Groupe Europeen de Chimiotherapie Anti cancereuse (GECA), is an extramural European Institute for collecting, co-ordinating and encouraging the work of scientists researching into cancer treatment at 16 European institutes: 3 in W. Germany, 2 in Italy, 2 in Belgium, 3 in the Netherlands, 2 in the United Kingdom, 1 in Switzerland and 3 in France. The first President of OERTC was Professor GEORGES MATHE, now succeeded by Professor SILVIO GARATTINI of Milan. The organization has a Board of 20 Directors, responsible for co-ordinating the entire range of activities and guiding research and experimental studies on animals, also the first human trials of new therapeutic agents which have been fully tested on animals. The Co-operating Groups carry out com plementary testing involving large numbers of patients. Thus, OER TC is not a 'learned society' but an agency for co-ordinating work. OER TC's annual plenary meeting for 1968 was held in Paris on 22nd and 23rd March. It was given over to an intensive study of the scientific basis of chemotherapy in the treatment of cancer in man. These two working sessions brought together members of all groups, both directing and co-operating. The first day was in effect a teaching seminar, open to all practitioners wishing to use chemotherapy in cancer, and explaining the scientific basis of such treatment. This seminar constitutes the present monograph.…

Taschenbuch. Condición: Neu. Neuware - The economics of forestry has always fascinated me as one of the most brain-taxing cases in economics. As an investment forestry is different from many other projects as it has unusually long gestation periods. For example, in the United Kingdom it takes over 40 years to grow coniferous and over 100 years for deciduous timber. These long gestation periods make it very clear how import ant are the magnitude of the discount rate and the method of discounting in the evaluation of investment projects. Any errors in these will misguide investors in forestry one way or the other. In addition, forestry redistributes income between gener ations. Its long gestation periods make it obvious that more than one generation will be involved in any venture. When we plant trees we know that the bulk of the benefits will be captured by future generations. Conversely, when we fell trees we reap the benefit of projects which were established in the past, mostly by generations who are long gone. So far most economists have devoted their time and energy to analysing income distribution in an intragenerational context, and this is a very sensitive and controversial issue. After all, most revolutions have taken place because of the uneven income distribution which was oppressive for the majority. Forestry helps us to study the case from the viewpoint of different generations. Forestry necessitates estimating timber prices a long time ahead.…

Taschenbuch. Condición: Neu. Neuware - Modern technology began in the 1950's and 1960's, with the devel opment of transistor technology. At first it was useful in improving the performance of voice communications. But then it made possible extraordinary computer capability in manageable size-and at man ageable cost. First came large mainframe computers for only the largest companies; and later the microcomputer as we know it today. The increasing use of computers, in the 1960's with their ability to manipulate and store vast quantities of information, stimulated the need for computers to communicate with one another and so tele phone circuits had to be segregated and conditioned specifically for computer traffic, using the modem. Computers ushered in a new era of business communications in which data could be developed, ma nipulated, stored or transmitted with remarkable ease. The recent pace of technological advancement has been breath taking and, today, the distinction between communications and computers is no longer even necessary. Computers, at the very core of communications networks, route and control communications on major common carriers. The decade of the 1980's is bearing the fruits of the marriage of computers and communications. For the first time networks are en abling organizations to utilize the combined processing power of computers and communications equipment.…

Taschenbuch. Condición: 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. Condición: Neu. Neuware - The aim of this book is to impart a sound understanding, both physical and mathematical, of the fundamentals of the theory of vibration and its applications. It presents in a simple and systematic manner techniques that can be easily applied to the analysis of vibration of mechanical and structural systems. In this book, an attempt has been made to provide the rational development of the methods of vibration from their foundations and develop the techniques in clearly understandable stages. This is the first volume, entitled 'An Introduction', intended for an introductory semester course in the theory of vibration. The solution procedures are explained in details easily understandable by students. The second volume, 'Discrete and Continuous Systems', is planned for publication in the fall of 1990.…

Taschenbuch. Condición: 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. Condición: 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. Condición: 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. Condición: 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. Condición: Neu. Neuware -This second volume of the Charged Particle Traps deals with the rapidly expanding body of research exploiting the electromagnetic con nement of ions, whose principles and techniques were the subject of volume I. These applications include revolutionary advances in diverse elds, ranging from such practical elds as mass spectrometry, to the establishment of an ult- stable standard of frequency and the emergent eld of quantum computing made possible by the observation of the quantum behavior of laser-cooled con nedions. Bothexperimentalandtheoreticalactivity intheseapplications has proliferated widely, and the number of diverse articles in the literature on its many facets has reached the point where it is useful to distill and organize the published work in a uni ed volume that de nes the current status of the eld. As explained in volume I, the technique of con ning charged particles in suitable electromagnetic elds was initially conceived by W. Paul as a thr- dimensional version of his rf quadrupole mass lter. Its rst application to rf spectroscopy on atomic ions was completed in H. G. Dehmelt¿s laboratory where notable work was later done on the free electron using the Penning trap. The further exploitation of these devices has followed more or less - dependently along the two initial broad areas: mass spectrometry and high resolution spectroscopy. In volume I a detailed account is given of the theory of operation and experimental techniques of the various forms of Paul and Penning ion traps.…

Taschenbuch. Condición: Neu. Neuware - Existence of huge amounts of data on the Web has developed anundeferring need to locate right information at right time, as well asto integrating information effectively to provide a comprehensivesource of relevant information.There is a need to develop efficient tools for analyzing and managingWeb data, and efficiently managing Web information from the databaseperspective. The book proposes a data model called WHOM (WarehouseObject Model) to represent HTML and XML documents in the warehouse. Itdefines a set of web algebraic operators for building new web tablesby extracting relevant data from the Web, as well as generating newtables from existing ones. These algebraic operators are used forchange detection.…

Taschenbuch. Condición: Neu. Neuware - This second volume of the Charged Particle Traps deals with the rapidly expanding body of research exploiting the electromagnetic con nement of ions, whose principles and techniques were the subject of volume I. These applications include revolutionary advances in diverse elds, ranging from such practical elds as mass spectrometry, to the establishment of an ult- stable standard of frequency and the emergent eld of quantum computing made possible by the observation of the quantum behavior of laser-cooled con nedions. Bothexperimentalandtheoreticalactivity intheseapplications has proliferated widely, and the number of diverse articles in the literature on its many facets has reached the point where it is useful to distill and organize the published work in a uni ed volume that de nes the current status of the eld. As explained in volume I, the technique of con ning charged particles in suitable electromagnetic elds was initially conceived by W. Paul as a thr- dimensional version of his rf quadrupole mass lter. Its rst application to rf spectroscopy on atomic ions was completed in H. G. Dehmelt's laboratory where notable work was later done on the free electron using the Penning trap. The further exploitation of these devices has followed more or less - dependently along the two initial broad areas: mass spectrometry and high resolution spectroscopy. In volume I a detailed account is given of the theory of operation and experimental techniques of the various forms of Paul and Penning ion traps.…

Taschenbuch. Condición: 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. Condición: Neu. Neuware - The characterization of the cellular and molecular mechanisms that mediate inflammation provides a foundation that supports future studies that will de fine mechanisms more intimately. It encourages substantial optimism about the opportunities to understand the inflammatory process and to use that information to develop novel therapeutic approaches. Recent progress has defined the cells that mediate the inflammatory response, many of the inter cellular transmitters, the receptors, signal transduction processes and regula tory mechanisms. Thus, we now have the opportunity to understand inflammation in pharmacologic terms and to attack the key molecular targets to develop new therapeutics. Among the cells involved in the inflammatory response are the lympho cytes, neutrophils and endothelial cells. Maintenance of homeostasis, re sponse to proinflammatory stimuli and pathophysiologic responses are products of complex interactions between these and other elements of the immune systems. Each of these cells displays a variety of receptors to define the stimuli to which they respond. The receptors displayed that the signal transduction processes and cellular responses are regulated genetically and epigenetic ally . The critical role of membranes and particularly the phospho lipid components of the membranes is emphasized by recent studies.…

Taschenbuch. Condición: Neu. Neuware - R. Y.Calne Surgeons are transplanting kidneys in ever increasing numbers-more than 10000 renal allografts have now been reported to the Transplant Registry. With related donors 75% of grafted kidneys continued to function after 2 years, compared with 50% when the donors were unrelated. The therapeutic value is obvious, but the management is largely empirical and results have improved little in the past 5 years. The basic sciences related to tissue transplantation have advanced rapidly. New serological and tissue culture techniques and chemical analysis of antigens and anti bodies have produced complicated data that is almost incomprehensible to the non specialist. Mathematical treatment of genetic probabilities and of immunological kinetics are similarly difficult to follow for those not especially trained. There has always been a gulf between the practical clinician whose patients do not behave like inbred rodents and the biologist who likes carefully controlled experiments with easily observed results. Both realize, however, that predictable and safe control of rejection must involve close collaboration and co-operation between the laboratory and the clinic. Unfortwlately, the different nature of the work and the workers has widened the gap between them. The clinicians tend to improve their techniques and patient care, whilst the biologists seek clearer and more precisely deflned experi ments which lead them to use increasingly artiflcial experimental models.…

Taschenbuch. Condición: Neu. Neuware - Why another series on infectious disease The question is a fair one in view of the proliferation of monographs, texts, and periodicals on the vast subject of infectious disease. The goal of this series is to provide an additional service to the clinician in the form of clinical information not usually assembled in one convenient volume. One type of monograph presented in this series will cover a specific infection, detailing microbiologic, research and clinical aspects. It is hoped that such a compilation will be helpful in both its thoroughness and breadth to the clinician interested in this particular problem. The other type of monograph that this series will provide will discuss a clinical presentation that comprises many possible specific etiologies. Volumes in the series will be multiauthored, giving us the opportunity to invite authorities in each specific area to contribute their expertise and experience. Regular revisions are planned so that each volume will remain as current as it is thorough. We hope that our goals are met and that the present series of mono graphs establishes its own identifiable and valuable niche in the growing compendium of resource material available to the clinician. Preface to the Second Edition Since the first edition of Infectious Mononucleosis was published, we have seen exciting advances in our understanding of this disease.…

Taschenbuch. Condición: 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. Condición: 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. Condición: 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. Condición: Neu. Neuware - The present volume developed from a symposium entitled 'Enhancing Biological Production of Ammonia From Atmospheric Nitrogen and Soil Nitrate' that was held at Lake Tahoe, California in June, 1980. The meeting was supported by the National Science Foundation, Division of Engineering and Applied Sciences and by the College of Agricultural and Environmental Sciences, University of California, Davis. A total of 99 scientists from 41 insti tutions participated. Plants capture solar energy in photosynthesis and use mineral nutrients to produce human food and fiber products. The extent to which such materials are removed from agricultural production sites represents a permanent drain of mineral nutrients. Some plants of agronomic importance such as alfalfa, soybean, and clover associate with soil bacteria and use photosynthetic energy to reduce N2 to NH3. Many other free-living bacteria and some symbioses involving procaryotes and eucaryotes also reduce N2. Such processes repre sent one natural mechanism by which Man can augment soil N for agronomic purposes without using fossil fuel to synthesize and distribute N fertilizer. Other metabolic conversions in the N cycle and physical leaching processes remove N made available through N2 fixation. Thus nitrification, denitrification, and utilization of soil N by plants are processes that must be con sidered if one is to conserve N captured by N2 fixation. The meeting at Lake Tahoe united scientists from many disci plines to review the literature and to discuss current research directed toward the goal stated in the symposium title. …

Taschenbuch. Condición: Neu. Neuware - Rapid developments of new investigative techniques and diagnostic modalities such as CT and MRI have revolutionized modern diagnostic imaging. Dr. Sperber and her contributors expertly facilitate understanding of the fundamentals of pulmonary disorders and promote a realistic and appropriate use of the exciting new diagnostic modalities. Methodologies of choosing techniques are also discussed. The first section of the book reviews the applications of the various radiographic modalities. The second part is organized by disease - emphasizing the radiographic manifestations and indicating appropriate imaging techniques most useful for diagnosis.…

Taschenbuch. Condición: Neu. Neuware - The present conference is the third in a series on this topic sponsored by the NCP. Drs. HcGhee, l1estecky, Genco and Bowen are to be commended for arranging this truly comprehensive program. We are fortunate that they have been able to assemble such a wealth of expertise. Program staff considers the advice of scientists such as yourselves essential to the success of its mission. Your presentations and discussions will focus on the crucial problems to be solved in exploiting the secretory immune system to combat dental caries. The published proceedings will bring these to the attention of the research community quickly and hopefully they will stimulate new investigators to bring their talents to these problems. This meeting will, to a large extent, determine the direction of research sponsored by the NCP. Finally, I would like to thank the members of the planning committee for their dedicated efforts over the past two years, which have culminated in this symposium. Our thanks are also due to each of you, in advance, for contributing so freely to the success of this meeting.…

Taschenbuch. Condición: Neu. Neuware - Since the publication of Neurobiology of Cerebrospinal Fluid 1 in 1980, that text has become the definitive reference concerning cerebrospinal fluid (CSF) for both basic scientists and clinicians involved in the investigation of degenerative, convulsive, cerebrovascular, traumatic, immunological, demyelinating, inflammatory, neoplastic, neuroendocrine, and psychiatric disorders. That initial volume began a tradition of detailed topic reviews written by international authorities with first-hand expertise in their respective fields of CSF research. Neurobiology of Cerebrospinal Fluid 2 represents a hefty collection of extensively refer enced and illustrated chapters covering topics not discussed in Vol. 1. More specifically, these chapters contain ample charts of original data, summary charts, and anatomical diagrams. Detailed illustrations of experimental and clinical techniques have been in cluded to facilitate their practical application. Each chapter in this multidisciplinary text has been critically reviewed by two experts in the respective field, and the appropriate revisions have been made. Recently published references and text modifications have been added at the proof stage in an effort to provide the most up-to-date review chapters possible. …