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Gran Área: Ciencias exactas y naturales
Área: Ciencias biológicas
Subárea: Biología celular y molecular

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Resultado: 1032 registro(s)

16971

Biological Environmental Impact Studies

Theory and Methods

 

Academic Press, 1978.

ISBNs 9780127353500

Colección: ScienceDirect

Resumen (en inglés): Biological Environmental Impact Studies: Theory and Methods explains how an environmental impact study aimed at predicting biological changes can be approached and accomplished. It explores environmental impact studies from an ecosystem function point of view and highlights ecological tools and guidelines for use in biological studies in the context of environmental impact assessment. It also considers four general concepts of biological impact studies: synergy, experimental control and causality, measures of ecosystem change, and the interrelationships between structure, function, and time.
Organized into seven chapters, this volume begins with an overview of environmental impact and environmental impact analysis, field surveys and their objectives, and mathematical modeling of biological systems. It then discusses time frames for ecological impacts; the role of field experiments and laboratory studies in environmental impact assessment; and common types of biological impact studies, including a study that investigated the impact of insecticides on the ecology of salt marshes in New Jersey and the effects of dredging, filling, and lagoon construction on tidal wetlands in Delaware.
This book is a valuable resource for biologists, biology students, managers, and government agents interested in environmental impact assessment.


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16972

Biological Events Probed by Ultrafast Laser Spectroscopy

 

Academic Press, 1982.

ISBNs 9780120499502

Colección: ScienceDirect

Resumen (en inglés): Biological Events Probed by Ultrafast Laser Spectroscopy summarizes the progress in the experimental and theoretical understanding of primary phenomena occurring in biology on a picoseconds and nanosecond time scale. This book includes basic principles, survey of research results, and thinking of experts in the fields of photosynthesis, vision, hemoglobin, and DNA.
This reference is organized into five parts. The primary events in the various areas of biology are reviewed in the first four parts. The last part covers the picosecond and subpicosecond laser techniques. Primary processes in photosynthesis are then discussed. This is followed by chapters on fluorescence and absorption kinetic measurements in higher plants. Subsequent chapters cover kinetic measurements in bacteria photosynthesis, theories of primary energy transfer appropriate to photosynthesis, and multiexcitation processes. Part II examines primary visual processes, including kinetic experimental work on rhodopsin and bacteriorhodopsin, and theoretical concepts on primary events in vision.
The third part presents the introductory materials on the kinetic models of hemoglobin and myoglobin. It also discusses the interesting picosecond measurements on these proteins. Part IV focuses on the application of modern ultrafast temporal techniques to the study of DNA and its components, as well as DNA-dye complexes. The concluding part introduces the principles of design and operation of the solid state laser and picoseconds spectroscopy methods. A discussion on pulse generation methods and measurement techniques applicable for measuring primary events in biological systems is provided.
This book is useful both for the newbies and experts in the field of ultrafast phenomena. It aims to attract biologists, chemists, physicists, and engineers who are interested in biological processes. It will help readers find all the necessary and relevant material in one presentation.


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16973

Biological Horizons in Surface Science

 

Academic Press, 1973.

ISBNs 9780125658508

Colección: ScienceDirect

Resumen (en inglés): Biological Horizons in Surface Science presents techniques used in surface science research as well as experimental data. It is organized in such a way that there is a transition from the more theoretical or molecular to the more biological. Emphasis is placed on the importance of water in determining molecular architecture and interactions. Methods of examining molecular associations and complex formation of molecules are discussed, and the results from such studies are reviewed. Permeability is examined from the point of view of the energies required to penetrate between two different phases, and from the role that multicellular membranes may play in directing the diffusion of ions or solutes in general. Current concepts of membrane structure based on membrane models are discussed and some new models are suggested.
Application of surface science techniques and the unique energies present at interphases are considered with regard to drug interaction with biological tissue and immunological phenomena. The importance of surfactant protein-lipid association is also discussed in regard to alveolar mechanics. This book is directed particularly to biologists who will find many of the techniques used of significance in their own research. It also aims to interest graduate students in this area of investigation.


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16975

Biological Monitoring of Marine Pollutants

 

Academic Press, 1981.

ISBNs 9780127184500

Colección: ScienceDirect

Resumen (en inglés): Biological Monitoring of Marine Pollutants presents the proceedings of a symposium on ""Pollution and Physiology of Marine Organisms"" held in Milford, Connecticut, on November 7-9, 1980. It looks at the physiological effects of pollutants, such as synthetic organic compounds, petroleum hydrocarbons, and heavy metals, on marine organisms ranging from fishes and shrimps to barnacles, crabs, mussels, polychaetes, and microalgae.
Comprised of four sections encompassing 22 chapters, this volume begins with an overview of the effects of synthetic organics, such as pesticides on marine organisms like the mysid shrimps Mysidopsis bahia. It proceeds with a discussion of the toxic effects of several chlorophenols on the grass shrimp, Palaemonetes pugio; how heavy metals, including silver, copper, cadmium, zinc, and mercury, affect species such as the polychaete Neanthes virens and the caridean shrimp Palaemonetes pugio; monitoring of water quality based on the biochemical and physiological responses of marine organisms to pollutants; and the effects of monocyclic aromatic hydrocarbons on fishes from an ecological standpoint.
Marine scientists, ecologists, and students will find this book extremely useful.


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16976

Biological Oscillators

their Mathematical Analysis

 

Academic Press, 1973.

ISBNs 9780125473507

Colección: ScienceDirect

Resumen (en inglés): Biological Oscillators: Their Mathematical Analysis introduces the main features of the dynamic properties of biological oscillators and the mathematical techniques necessary for their investigation. It is not a comprehensive description of all known biological oscillators, since this would require a much bigger volume as well as a different type of expertise. Instead certain classes of biological oscillators are described, and then only in as much detail as required for the study of their dynamics.
The opening chapter reviews fundamental mathematical concepts and techniques which will be used in the remainder of the book. These include phase plane techniques; asymptotic techniques of Krylov, Bogoliubov, and Mitopolski; and the describing function. Subsequent chapters discuss examples of biological oscillators; phase shifts and phase response curves; the entrainment of oscillators by external inputs; the dynamics of circadian oscillators; effects of changing environment on the dynamics of biological oscillators; the features peculiar to populations of interacting oscillators; and biological phenomena attributable to populations of oscillators.


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16977

Biological Response Modifiers

New Approaches to Disease Intervention

 

Academic Press, 1985.

ISBNs 9780126957709

Colección: ScienceDirect

Resumen (en inglés): Biological Response Modifiers: New Approaches to Disease Intervention focuses on biological response modifiers (BRMs) and the ways they provide novel approaches to disease control. It examines how BRMs act through an organism's own biological response mechanisms and how their mechanisms of action can be utilized to develop new modalities of chemotherapy.
Organized into 15 chapters, this volume begins with an overview of specific agents and approaches to biological therapy, the basic concepts of immunity, and BRM screening. It then discusses interferons and their immunoregulatory functions; mechanism of interferon action; how nucleic acids and polynucleotides regulate the immune system; clinical applications of thymosins and other thymic hormones; the antibacterial and antineoplastic properties of tuftsin; and production and characterization of tumor necrosis factor. The reader is also introduced to detection and activity of colony-stimulating factor; the role of neuroendocrine hormones in the immune system; chalones and other endogenous inhibitors of cell proliferation; biochemistry of lymphotoxins; muramyl peptides as immunopharmacological response modifiers; biological activities of transfer factor in leukocyte dialysates; and requirements for activation and growth of human lymphocytes.
This book is a valuable resource for immunologists, clinicians, biochemists, and organic/medicinal chemists.


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16978

Biological Solar Energy Conversion

 

Academic Press, 1977.

ISBNs 9780125006507

Colección: ScienceDirect

Resumen (en inglés): Biological Solar Energy Conversion is a publication comprised of formal papers presented during the 1976 conference on Biological Solar Energy Conversion held at the Rosenstiel School of Marine and Atmospheric Science. The conference aims to bring together a group of scientists who have made significant observations concerned with various aspects of solar energy conversion. The ideas and information presented in this publication intend to expand the understanding of the readers about the biological processes involved in biological solar energy conversion and direct them to practical application.

This compilation is divided into four sections and consists of 25 scholarly articles about the subject matter. The first section includes papers that discuss developments in the methods employed in the capture and utilization of solar energy. The second and third sections feature papers that dealt with the synthesis of organic compounds from carbon dioxide and nitrogen fixation and production of single cell protein. The last section of the publication presents papers that show future trends and practical applications involved in the biological conversion of solar energy.

This book will be an excellent reference for researchers working on energy research and development. This collection of scientific articles can also be an invaluable reference for agriculture, meteorology, plant sciences, agronomy, and biology students.


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16979

Biological Transmission of Disease Agents

 

Academic Press, 1962.

ISBNs 9780123955258

Colección: ScienceDirect

Resumen (en inglés): Biological Transmission of Disease Agents covers the proceedings of a 1960 symposium on Biological Transmission of Disease Agents, held in conjunction with the Annual Meeting of the Entomological Society of America in Atlantic City, New Jersey. This book discusses methods, approaches, and problems that contribute to the progress in basic and applied research in biological transmission. This compilation is organized into two major parts encompassing 13 chapters that cover agents of plant, animal, and human diseases.
The first part of the book deals with the status and significant advances of plant viruses, and the mechanical and non-mechanical transmissions and nematode vectors of these viruses. The second part starts with a discussion on viral agents known to be mosquito-borne, their importance in animal and human disease causation, as well as the several types of biological cycles involved in their transmission. The following chapters describe groups of diseases caused by transmission of sandflies, tabanids, Tsetse-borne insects, mites, ticks, and helminths. The concluding chapter presents ways of suppressing the vectors that cause diseases, such as malaria, typhus, filariasis, dysentery, trypanosomiasis, and dengue.

The book appeals to students of entomology, plant pathology, human and veterinary medicine, virology, zoology, microbiology, and other branches of biology.


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21162

Biology and Agronomy of Stylosanthes, The

 

Academic Press, 1984.

ISBNs 9780126616804

Colección: ScienceDirect

Resumen (en inglés): The Biology and Agronomy of Stylosanthes covers the proceedings of the 1982 International Symposium on The Biology and Agronomy of Stylosanthes, held in Townsville, Queensland, Australia. The symposium aims to present the developments in the research of the economically important genus, Stylosanthes. Comprised of three parts encompassing 31 chapters, the book discusses Stylosanthes taxonomy, genetic resources, plant-environment interaction, and agronomy.
The opening part discusses the taxonomic problems, evolution, and cytogenetic studies of Stylosanthes species. This part also considers the natural variation and distribution, Brazilian species, and existing collection of the genus. The second part of the book presents available data on the occurrence of water shortage in plant tissue and how plants react to it. This part also deals with other environmental constraints to growth and survival, the mineral nutrition, reproductive physiology, and diseases and pest problems of Stylosanthes. A discussion on the influence of mycorrhiza and rhizobium in the genus is also included. The concluding part examines the effect of seed biology on initial pasture establishment and the population dynamics of established pastures. Considerable chapters in this part are devoted to the agronomical aspects of the genus, including nitrogen inputs; chemical composition and nutritive value; and animal and seed production. The book further presents data on global ventures in Stylosanthes, including agricultural projects, research and development, breeding programs, and productivity programs in various regions.
This book is an ideal source of information for biologists, agronomists, scientists, and researchers.


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16980

Biology and Chemistry of Eukaryotic Cell Surfaces

 

Academic Press, 1974.

ISBNs 9780124415508

Colección: ScienceDirect

Resumen (en inglés): Biology and Chemistry of Eucaryotic Cell Surfaces contains the proceedings of the Miami Winter Symposia, held on January 14- 15, 1974 and organized by the Department of Biochemistry, University of Miami School of Medicine, in Miami, Florida.
Organized into 27 chapters, separating the manuscripts presented at the symposium, this book presents the stochastic studies on cell surface stickiness and the adhesion and aggregation of blood platelets. This text also explains the cell-contact and transformation-induced changes in the dynamic organization of normal and neoplastic cell plasma membranes and their role in lectin-mediated toxicity toward tumor cells. It also looks into the chemical components of surface membranes related to biological properties, carbohydrate antigens of cell surfaces, and molecular orientation of erythrocyte membrane glycoproteins. Some other chapters discuss the cell envelope glycoprotein biosynthesis in fungi, cellular lectin receptors, and topographical alterations of the fat cell surface membrane elicited by concanavalin A. Immunochemical evidence for putrescine sites on the membrane of mammalian cells, as well as the fractionation and biosynthesis of membrane components in erythroid cells, are also described.


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