Springer apr 1983 (8 Ergebnisse)

Buch. Zustand: Neu. Neuware - I. Additives Which Modify Physical Properties.- 1 Plasticizers.- 1.1 Thermodynamic Basis of Macromolecular Mixtures.- 1.1.1 Solubility of Polymers in Solvents.- 1.1.2 Flory-Huggins Interaction Parameter.- 1.1.3 Solubility Parameter.- 1.1.4 Phase Separation Phenomena.- 1.2 Reversible Gelation.- 1.3 Theory of Plasticization.- 1.3.1 Effect of Plasticizers on Thermal Mechanical Deformation of Rigid Polymeric Chains.- 1.3.2 Effect of Plasticizers on Tb and Tg Values.- 1.3.3 The Free Volume in Amorphous Polymers.- 1.3.4 Primary and Secondary Plasticizers.- 1.4. Classification of Plasticizers.- 1.4.1 Polar Aromatic and Polar Aliphatic Plasticizers.- 1.4.2 Characteristics of Plasticizers According to Their Chemical Structure.- 1.5. Plasticizer Anomalies and Antiplasticization.- 1.6. Loss of Plasticizers.- References.- 2 Lubricants and Mold-Release Agents.- 2.1 Lubricants.- 2.1.1 Principles of Their Action.- 2.1.2 Classification of PVC Lubricants According to Their Specific Action.- 2.1.3 Classification of PVC Lubricants According to Their Chemical Structure.- 2.1.4 Lubricants for Polyolefins.- 2.1.5 Basic Properties Necessary for Lubricants.- 2.2 Mold-Release Agents.- 2.2.1 Principles of Action.- 2.2.2 Some Examples of Mold-Release Agents.- References.- 3 Macromolecular Modifiers.- 3.1 Introduction.- 3.2 Homogenization of Polymer-Polymer Systems.- 3.3 Two-Phase Microheterogeneous Polymer-Polymer Systems.- 3.3.1 Effect of Glassy Polymer Matrix Phase on Impact Strength.- 3.3.2 Effect of Rubbery Phase Dispersed in Glassy Matrix on Impact Strength.- 3.3.3 Theory on Toughness of Microheterogeneous Two-Phase Polymer-Polymer Blends.- 3.4 Impact Modifiers for Glassy Polymers.- 3.4.1 Chlorinated Polyethylene (CPE).- 3.4.2 Ethylene-(Vinyl Acetate) Copolymers (EVA).- 3.4.3 Acrylic and Methacrylic Elastomers and MBS and ABS Terpolymers.- 3.4.4 Rubbers.- 3.5 Macromolecular Modifiers Used as Polymer Processing Aids.- References.- 4 Reinforcing Fillers, Reinforcing Agents, and Coupling Agents.- 4.1 Fillers.- 4.1.1 General Characteristics of Fillers and Composites.- 4.1.2 Fillers for Thermosetting Resins.- 4.1.3 Fillers for Plastomers.- 4.1.3.1 Polymer Reinforcement Factors.- 4.1.3.2 Classification of Fillers for Plastomers According to Their Reinforcement Activity.- 4.2 Reinforcing Agents for Laminates.- 4.2.1 Effect of Fillers or Reinforcing Agents on Basic Physical Properties of Composites.- 4.3 The Different Types of Fillers and Reinforcing Agents.- 4.3.1 Glass Fillers and Reinforcing Agents.- 4.3.1.1 Glass Fibers.- 4.3.1.2 Glass Microspheres.- 4.3.1.3 Glass Flakes.- 4.3.2 Fillers and Reinforcing Agents Made of Other Materials.- 4.3.2.1 Fibrous and Flaky Fillers and Fibrous Reinforcing Agents.- 4.3.2.2 Whiskers, Microfibers, and Powdered Fillers.- 4.3.3 Effect of Content and Size of Fillers on Composite Properties.- 4.4 Coupling Agents.- 4.4.1 Silane Coupling Agents.- 4.4.1.1 Action Mechanism.- 4.4.2 Organotitanate Coupling Agents.- 4.4.2.1 Action Mechanism.- 4.4.3 Other Types of Coupling Agents.- 4.4.4 Application Modes for Coupling Agents.- 4.4.5 Recommendations on the Use of Fillers and Filling Methods.- References.- 5 Colorants and Brightening Agents.- 5.1 Colorants.- 5.1.1 Inorganic Pigments.- 5.1.2 Organic Pigments.- 5.1.3 Criteria for Selection of Pigments.- 5.2 Brightening Agents.- 5.3 Methods Used for the Coloration of Plastics.- 5.3.1 Some Examples of Methods Used for the Coloration of Most Important Plastics.- References.- 6 Chemical and Physical Blowing Agents.- 6.1 Chemical Blowing Agents.- 6.1.1 Inorganic Agents.- 6.1.2 Organic Agents.- 6.1.2.1 Characteristics.- 6.1.3 Factors Acting on Blowing.- 6.2 Physical Blowing Agents.- References.- 7 Antistatic Agents.- 7.1 Introduction.- 7.2 Efficiency and Mechanism of Antistatic Agent Action.- 7.3 The Use of Antistatic Agents.- 7.3.1 Antistatic Agents Containing Nitrogen.- 7.3.2 Antistatic Agents Containing Phosphorus.- 7.3.3 Antistatic Agents Containing Sulfur.- 7.3.4 Betaine-Type. …

Buch. Zustand: Neu. Neuware - In Harch of 1980, we organized the first symposium on how to evaluate new antiarrhythmic agents in which the participants included members of the Cardio-Renal Division of the Food and Drug Administration, academic investigators from the United States and Abroad and directors and imple mentors of pharmacological research representing the pharmaceutical industry. By bringing together all three elements, it was hoped that better communication and under standing would ensue to more rapidly bring new cardiac agents to the American public. This goal was important since a rather limited number of antiarrhythmic agents were and are currently available to treat patients with such disorders in the United States. These agents are needed not only for the treatment of patients with sustained ventricular tachyarrhythmias which produce life-threatening hemodynamic consequences but also and in fact more potentially important as a prophylactic measure in the high risk patient subject to sudden cardiac death. This book represents the proceedings of the third of these Symposiums whose purpose was to evaluate the clinical research methodology and models used in the evaluation of ne' antiarrhythmic agents for not only acute therapeutic inter vention but also for the prophylaxis of sudden cardiac death. In addition, new devices have evolved over the past few years that can detect and treat life-threatening cardiac arrhythmias and the evaluation of efficacy and safety of these devices is detailed.…

Buch. Zustand: Neu. Neuware - Linguistic theory has seen a substantial shift in focus during the past decade. Whereas early research in generative grammar sought descriptive adequacy through the proliferation of transformational rules, recent efforts have concentrated on defining systems of principles that restrict the application of a greatly simplified sys tem of rules of grammar. These principles, because of their broad application within a particular language, and their appearance in a wide range of languages under investigation, are claimed to reflect innate cognitive structures often termed universal grammar. Accompanying this new, and very interesting research in linguis tic theory is an interest in certain aspects of the language acquisi tion process that relate to the theoretical claims. As new insights allow us to hypothesize both more specifically and more plausibly about linguistic universals, the actual facts about linguistic develop ment in young children become increasingly relevant as additionaldata on which to formulate and test new ideas. This book looks closely at a particular set of linguistic structures with respect to both linguistic theory and language development, exploring the relationship between the theoretical claims and the results of a series of language acquisition experiments. Although work of this sort is often called interdisciplinary, the issues addressed are clearly defined, although not all of them are answered. This book should be of particular interest to linguists, and to psychologists concerned with linguistic and cognitive development.…

Buch. Zustand: Neu. Neuware - In addition to performing its prime function as a vehicle for scientific communications of varied colora tions, Molecular and Cellular Biochemistry is again focusing on two subjects which it treats in depth. One of these is a book issue dealing with the transglutaminase reaction. The other is this issue that deals with induction and modulation of enzymes. This is a very broad subject that calls for broader coverage than could be included in one book issue. However, I have elected to include only certain contributions that serve as general examples of the principles involved. There are six articles on enzyme regulation in hepatocyte culture. These include arginase and argino-succi nate synthetase, y-glutamyl transferase and plasminogen activitor. Other regulatory enzymes that are discussed are protein kinases, 2,3-bisphosphoglycerate synthetases, carbamoyl phosphate synthetase, heme oxygenase, cytochrome P-450, tyrosine hydroxylase, fatty acid synthetase, acetyl eoA carboxylase, among others. Also included is the regulation of several enzyme messengers RNAs. As in the past, subscribers to the journal will receive this double volume as a continuation of regular issues of the journal Molecular and Cellular Biochemistry. This double volume will also be available separately in the form of a book issue to interested readers through Martinus Nijhoff Publishers. v.A. Najjar Part I Molecular and Cellular Biochemistry 53;54,11-21 (1983). 1983, Martinus 1 ij hoff Publishers. Boston. Printed in The Netherlands.…

Buch. Zustand: Neu. Neuware - One of the most active and productive areas of biological science in the past decade has been the study of the biochemical and biophysical prop erties of cell membranes. There is little doubt that membranes are essen tial components of all cellular systems and that each type of membrane manifests specific and characteristic cellular functions. In the nervous system, important events such as neurotransmission, receptor binding, ion transport, axonal transport, and cell uptake are all known to take place within the neural cell membrane. Phospholipids, one of the major components of membranes, not only provide the membrane with its structural integrity and physical proper ties, but also play an important role in regulating membrane function. Attention has recently been focused on the asymmetric localization of these molecules, the identification of discrete metabolic pools of phospholipids within the membrane matrix, and their involvement in sig nal transmission. Although synaptic membranes generally lack an active mechanism for the de novo biosynthesis of phospholipids, a number of enzymic routes are present for their interconversions and for facilitating metabolic turnover. Metabolites generated during the interconversion reactions may also exert a great influence in modulating membrane func tions. The phosphogylcerides of neural membranes are especially enriched in polyunsaturated fatty acids. However, only very small amounts of these fatty acids are present in the free form, and they are maintained in dynamic equilibrium with the membrane phospholipids.…

Buch. Zustand: Neu. Neuware - .a wonderful book! .a comprehensive treatment of the fauna, flora and formations of the last 2 million years. .every serious library must have a copy.' Journal of Coastal Research, 1: 4 (1985) .an amazing book, in part because it has often been said in recent years that no single author these days could put together such a synthesis. .an easy-to-read, well-written, amazingly thorough treatise on the Pleistocene. It is without equal among the current monographic works in terms of coverage, depth, and timeliness. .Nilsson has captured the flavor of the history, development, and controversy of Quaternary science and provided us with an invaluable source book.' Arctic and Alpine Research, 17: 3.…

Buch. Zustand: Neu. Neuware - In most European countries there is a growing imbalance between the supply and demand of medical manpower. Though many national gov ernments, international organizations and scientific institutes, and also, with a view from a different angle, doctors associations recognize this problem, it appears to be very difficult to bring all people concerned with this problem together in order to find a solution. On this occasion, the initiative to arrange an international meeting was taken by the junior-doctors associations of The Netherlands and Sweden with the organizational support of the Faculty of Medicine of University Limburg, Maastricht, The Netherlands, and under the auspices of the Permanent Working Group of European Junior Hospital Doctors. The symposium should be considered as a step in a series of continuing activities within the field of health manpower planning. The Organization for Economic Cooperation and Development (OECD) organized a working symposium on Long-Range Forecasting and Planning in 1968 (8ellaglio, Italy), followed by the Expert Committee ofthe OECD which produced the 'New Directives in Education for Changing Health Care System' (OECD CERI report, Paris 1975). The Dutch ministries of Education and Sciences and of Health and Environmental Protection organized a seminar on 'Cooperation of Health Care and Education at Regional Level, Responsibilities and Cost Alloca tion' (1978, Noordwijkerhout, The Netherlands). Following this, the Dutch Association of Junior Hospital Doctors (LVAG) organized a national con ference 'Today a consultant in training, tomorrow an unemployed special ist ' (1980, Utrecht, The Netherlands).…

Buch. Zustand: Neu. Neuware - Over the past two decades, two-phase flow and heat transfer problems associated with two-phase phenomena have been a challenge to many investigators. Two-phase flow applications are found in a wide range of engineering systems, such as nuclear and conventional power plants, evaporators of refrigeration systems and a wide vari ety of evaporative and condensive heat exchangers in the chemical industry. This publication is based on the invited lectures presented at the NATO Advanced Research Workshop on the Advances in Two-Phase Flow and Heat Transfer. The Horkshop was attended by more than 50 leading scientists and practicing engineers who work actively on two-phase flow and heat transfer research and applications in dif ferent sectors (academia, government, industry) of member countries of NATO. Some scientific leaders and experts on the subject matter from the non-NATO countries were also invited. They convened to discuss the state-of-the-art in two-phase flow and heat transfer and formulated recommendations for future research directions. To achieve these goals, invited key papers and a limited number of contributions were presented and discussed. The specific aspects of the subject were treated in depth in the panel sessions, and the unresolved problems identified. Suitable as a practical reference, these volumes incorporate a systematic approach to two-phase flow analysis.…