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Elsevier

Libros en Ciencias Agrícolas y Biológicas

The Agricultural and Biological Sciences collection advances science-based knowledge for the improvement of animal and plant life and for secure food systems that produce nutritious, novel, sustainable foods with minimal environmental impact. Food Science titles include not only those products from agriculture but all other aspects from food production to nutrition, health and safety, chemistry to security, policy, law and regulation. Biological Sciences address animal behaviour and biodiversity, organismal and evolutionary biology, entomology, marine biology and aquaculture, plant science and forestry.

  • Advances in Marine Biology

    • 1 Edición
    • Volumen 26
    • Inglés
    Volume 26 of this important series will be of particular interest to fish biologists. Haug's review of Atlantic halibut presents a complete summary of this important species both as a subject of a pelagic fishery and a developing aquaculture industry. Kjorsvik and his colleagues focus on the importance of egg quality for the mass production of fish fry. They point to a number of characters that may be indicative of egg quality and which may help to assess their likelihood of producing good fry.****Neilson and Perry review the studies of diel movements in fish and conclude that they are often facultative in nature. The implications for fish sampling are discussed.****Finall... Burd and Nemec examine the development of practical approaches towards the methods of analyzing benthic infauna, pointing out the assumptions and limitations of each.

  • Advances in Botanical Research

    • 1 Edición
    • Volumen 17
    • Inglés
    This latest volume in the series focuses on evolution and palaeobotany, plant-microbe interactions, and biomechanics.Collins... reviews the Early Tertiary floras and presents new evidence on the evolution and diversification of land plants using computer analysis of plant assemblages and reconstructions of fossil plants and plant communities. Fries and Endress combine the skills of palaeobotanists and neobotanists to more closely examine the evolution and morphology of angiosperm flowers.Miller turns his attention to the bacteria symbiotic in the leaf nodules of plants. This most complex of relationships between bacteria and higher plants involves a close and lifelong interaction at the deepest cellular level and is a fascinating system only poorly understood as of yet. Vincent deals with the fracture properties of plants--an important subject both for the plant trying to survive in a hostile environment and for its implications for agriculture and the palatability of food.

  • Elsevier's Dictionary of Horticultural and Agricultural Plant Production

    In English, Dutch, French, German, Danish, Swedish, Italian, Spanish, Portuguese and Latin
    • 1 Edición
    • Jason Hort + 1 más
    • Inglés
    The first edition of this dictionary, Elsevier's Dictionary of Horticulture, edited by J. Nydam and A. de Jong was published in 1970. Since that time horticulture has expanded and developed spectacularly and the aim of this second edition is to meet a worldwide need to develop close contacts and to keep up with the developments in the horticultural world. Numerous terms have been introduced, covering a far broader field than the previous dictionary.Again English was chosen as the basic language and Portuguese has been added with Latin for the scientific names of organisms. Apart from the traditional subjects like vegetables, fruits, arboriculture, floriculture, mushrooms, crop science, plant breeding, botany and soil science, it now also includes tropical and subtropical horticulture, herbs and spices, landscaping, arable farming and grasses. More attention has been paid to market planning, economics, education, and extension and labour management. A number of terms relating to apiculture, meteorology and informatics have been introduced. Technology has been given more prominence, but so many new terms have been coined in this field that a selection had to be made. Regarding plant diseases, only general terms are mentioned; specific pests and diseases are not listed in view of the existence of specialized dictionaries. The same goes for weeds. A list of international organizations is included, with translations in English and French.

  • Soils on a Warmer Earth

    Effects of Expected Climate Change on Soil Processes, with Emphasis on the Tropics and Sub-Tropics
    • 1 Edición
    • Volumen 20
    • H.W. Scharpenseel + 2 más
    • Inglés
    The theme of this book is a far reaching one and should attract great interest, both in industrialized as well as in less developed countries. Although the question of climate change and its effects on soil productivity is overshadowed by so many current events, it is almost certain that this subject will remain on the international agenda for the years to come; not only as science and research are concerned but also in relation to development policies, agricultural policies and others, especially since poor, rich, developed and developing countries are equally threatened by these problems.

  • Biochemistry of Foods

    • 2 Edición
    • N.A. Michael Eskin
    • Inglés

  • Analysis of Wildlife Radio-Tracking Data

    • 1 Edición
    • Gary C. White + 1 más
    • Inglés
    With the substantial advances in the miniaturization of electronic components, wildlife biologists now routinely monitor the movements of free-ranging animals with radio-tracking devices. This book explicates the many analytical techniques and computer programs available to extract biological information from the radio tracking data.

  • Soil Micromorphology

    A Basic and Applied Science
    • 1 Edición
    • Volumen 19
    • L.A. Douglas
    • Inglés
    The book includes selected papers from those presented at the International Working Meeting on Soil Micromorphology in San Antonio, Texas, July 1988. Each section of the book is introduced with an invited plenary paper followed by selected contributed manuscripts. The volume is intended to give the reader insight into the more recent research work involving soil micromorphology and an evaluation of the present day state of the science. New applications of micromorphology to both lunar pedology and archeology are presented. Recently developed methods for staining of microorganisms and thin section fluorescence microscopy are presented. The volume presents a summary of the research findings of the major practitioners of soil morphology and will give the reader insight as to the present state of the discipline. New methods and techniques will be made available to the reader.The book is intended for students, practicing micromorphologists, soil scientists, geologists, and geomorphologists.

  • Vitamins and Minerals in Health and Nutrition

    • 1 Edición
    • M Tolonen
    • Inglés
    This book is an excellent introduction to the increasingly complex field of nutrition and health for food technologists and health professionals. It includes individual entries for all major vitamins, minerals and trace elements. Information is provided on nutritional medicine and cell protective mechanisms, together with the role of vitamins, minerals, trace elements and essential fatty acids in treating and preventing disorders.

  • Physical Properties of Foods and Food Processing Systems

    • 1 Edición
    • M J Lewis
    • Inglés
    This book is an invaluable introduction to the physical properties of foods and the physics involved in food processing. It provides descriptions and data that are needed for selecting the most appropriate equipment in food technology and for making food processing calculations.

  • Advances in Botanical Research

    • 1 Edición
    • Volumen 16
    • Inglés
    The latest volume in the series continues to serve botanists with a wide range of interests.

  • Aphids

    • 1 Edición
    • Volumen 2C
    • Bozzano G Luisa
    • Inglés

  • Interrelationships Between Microorganisms and Plants in Soil

    • 1 Edición
    • Volumen 18
    • Inglés
    These proceedings present the most up-to-date information on the interrelations between microorganisms and plants in the rhizosphere, and the possibility of utilizing these relationships to improve plant growth, health and yields. The application of some biological preparations may in the future partially replace the use of agrochemicals and thus contribute to environmental improvement and enhancement of the quality of soil, water and foodstuffs.The Symposium brought together specialists from fifteen countries to assess the advances in a field which has recently attracted considerable interest and is also important for society at large. The book contains over sixty contributions from rhizosphere microbiologists, focusing on the study of the function of microorganisms in the root system of crop plants and in its immediate vicinity, the effect of the plants themselves on this function, the interrelationships among different microorganisms in the rhizosphere and the elucidation of the mechanisms of microbial action in the agroecosystem. All these lines of research are intimately associated with the problems of soil fertility and crop yields, which in turn have a direct bearing on the nutrition of mankind and on environmental protection. The papers have been divided into four topics: symbiotic microorganisms in the root system; associative microorganisms in the root system; soil-borne phytopathogenic and phytotoxic microorganisms; and microbial preparations stimulating growth and improving the plant health. Each section starts with invited lectures from outstanding specialists. The work includes numerous tables, figures and references.The volume is primarily directed at soil microbiologists, plant pathologists and physiologists, ecologists as well as specialists in agronomy and environmental protection.

  • Advances in Marine Biology

    • 1 Edición
    • Volumen 25
    • Inglés
    Volume 25 of this authoritative review series continues the high standard set by the editors in the past. Marine biologists everywhere have come to value and enjoy the wide variety of thought-provoking papers written by invited experts.In this volume are reviews of four animal groups which span the entire range of the marine food chain. The role of parasites in ecology is a growing interest and the parasites of zooplankton are described in detail for the first time. Aspects of thegastropods, cephalopods and fish life are also examined in detail.

  • Advances in Agronomy

    • 1 Edición
    • Volumen 42
    • Inglés

  • Valuation Methods and Policy Making in Environmental Economics

    • 1 Edición
    • Volumen 36
    • H. Folmer + 1 más
    • Inglés
    This volume considers, in depth, some valuation methods and aspects of cost benefit analysis, and policy making in environmental economics. Part I contains a number of contingent valuation studies for non-market assets. Part II consists of contributions on the valuation of health and life, and deals with the benefits of reduced morbidity from air pollution control. In Part III, cost benefit analysis for environmental policy-making is discussed in a disequilibrium setting, and in a macroeconomic context. Finally, Part IV deals with aspects of policy-making, particularly benefit estimation for complex policies, and the international aspects of transboundary air pollution in Europe.The book should not only appeal to students and researchers in university departments of economics and ``environmental sciences'' but also to those working in public organisations and associated advisory institutes which are concerned with environmental problems.

  • Armored Scale Insects

    • 1 Edición
    • Volumen 4A
    • Bozzano G Luisa
    • Inglés
    This volume presents an up-to-date account of armored scale insects (Homoptera: Diaspididas), a family of highly specialized insects, many of which are important agricultural pests. Being sedentary, colonial and rather cryptic, many species have invaded new countries with important host plants. This has made them prime targets for biological control by natural enemies.No other book has attempted to present such a rounded picture of this important group. It covers all aspects: morphology, systematics, phylogeny, biology, ecology, natural enemies (pathogens, predators, parasites), pest status, control measures (quarantine, eradication, monitoring, chemical control, biological control, mechanical control, integrated control), as well as pest problems and control on specific crops, from a worldwide perspective.The armored scale insects: their morphology, systematics and phylogeny; reproductive biology and genetics; development biology and physiology; ecology; and techiques for their study is handled in Volume A.The book is intended for a broad audience: professional entomologists, extension specialists, pest control operators and advanced horticulturists and agriculturists, as well as biologists, naturalists and environmentalists (the latter should find the strong emphasis on natural enemies and biological control of interest).

  • Advances in Food Research

    • 1 Edición
    • Volumen 32
    • Inglés

  • Advances in Botanical Research

    • 1 Edición
    • Volumen 15
    • Inglés
    The latest volume in this series continues as a detailed review in botanical science to a wide audience. The papers in this volume are of general interest and present fascinating updates of important aspects of plant growth, physiology, and reproduction.

  • Advances in Insect Physiology

    • 1 Edición
    • Volumen 21
    • Inglés
    This latest volume in this series contains articles on a variety of insect physiological topics from the nervous system to the cuticle and circulatory system.

  • The Ecology of Social Behavior

    • 1 Edición
    • Bozzano G Luisa
    • Inglés
    The chapters in this book discuss and summarize the ecological factors affecting and effecting the formation of animal social groups and thereby address one of the central issues confronting researchers and students in sociobiology. The objectives are to review what is known about the impact of ecological factors in the formation and maintenance of social groups. Numerous examples have been drawn from a variety of phyla.

  • Advances in Food Research

    • 1 Edición
    • Volumen 31
    • Inglés

  • Advances in Agronomy

    • 1 Edición
    • Volumen 41
    • Inglés

  • Advances in Botanical Research

    • 1 Edición
    • Volumen 14
    • Inglés

  • Chemistry of Soil Organic Matter

    • 1 Edición
    • Volumen 17
    • K. Kumada
    • Inglés
    Despite the large number of papers and books published on soil organic matter (humus), our knowledge of the subject is still very limited, as is our knowledge of humic acid. The author of this book began to study humus at the end of the 1940s and continued until 1984 when he retired from Nagoya University. With the intention of establishing a systematic understanding of soil organic matter, he has compiled facts and a discussion of humus based on his extensive experimental results during the past 40 years.In this book, humic acids are classified into A, B, Rp and P types, based on their optical properties. The elementary composition and other chemical properties of humic acid types are shown to be regularly different from each other. A new method for humus composition analysis applied to various kinds of soils in Japan and several other countries indicates that the diversity of humus compositions of soils is systematically understandable. These findings lead the author to novel theories on the chemical configuration and formation of humic acids and humic substances. Diagenesis of humus under terrestrial conditions is illustrated as to the buried humic horizons of Black soil (Andosol).The book will be useful not only to soil scientists and agronomists but also to geochemists, oceanographers, limnologists, water scientists, biologists and chemists who are dealing with organic matter in terrestrial, aquatic, and sedimentary environments.

  • Trace Elements in Human and Animal Nutrition

    • 5 Edición
    • Walter Mertz
    • Inglés
    The major change in the format of the fifth edition is the presentation of the book in two volumes, necessitated by the rapidly increasing knowledge of metabolism, interactions, and requirements of trace elements. The guiding principle was to present the minimum of results that would serve as a logical foundation for the description of the present state of knowledge.

  • Advances in Marine Biology

    • 1 Edición
    • Volumen 24
    • Inglés

  • Advances in Ecological Research

    • 1 Edición
    • Volumen 17
    • Inglés

  • Laboratory Hamsters

    • 1 Edición
    • G. L. Van Hoosier Jr.
    • Inglés

  • Towards Holistic Agriculture

    A Scientific Approach
    • 1 Edición
    • R.W. Widdowson
    • Inglés
    This book explains the use of an ecological way of farming, with modern practical applications, to make the fullest use of land resources and the best utilization of available capital and labour. In analyzing the vital relationship between soil, plant, animal and man, the author discusses the best care of land itself, its components, grassland management and the most efficient use of crops to maximize yield, food quality and profitability without the extensive use of chemicals and without damaging the ecology. Widdowson also covers the holistic approach to animal farming, the welfare and health of poultry, cattle, sheep and goats, their nutritional needs through the various stages of their lives, and the best way to balance their diets.

  • Photosynthesis

    • 1 Edición
    • Volumen 15
    • J. Amesz
    • Inglés
    Photosynthesis is an active area of research in which many exciting developments have taken place in the last few years. This book gives an overview of the present understanding of all areas of molecular processes of photosynthesis. It is based on the international literature available in the summer of 1986 and much unpublished material. The new material contained in this book, together with a basic framework of established concepts, provide a useful source of reference on the biochemical and biophysical aspects of photosynthesis in plants and bacteria. The book is written by specialists in the various areas of photosynthesis and is useful both for workers in these areas as a source of specialized information as well as for non-photosynthesists who want to become informed about recent developments and basic concepts in this area.

  • Antarctica: Soils, Weathering Processes and Environment

    • 1 Edición
    • Volumen 16
    • I.B. Campbell + 1 más
    • Inglés

  • Remote Sensing in Soil Science

    • 1 Edición
    • Volumen 15
    • M.A. Mulders
    • Inglés
    This book provides comprehensive coverage of remote sensing techniques and their application in soil science. A clear, step-by-step approach to the various aspects ensures that the reader will gain a good grasp of the subject so that he can apply the techniques to his own field of study.The book opens with a thorough introduction to the physical aspects of electromagnetic radiation and the technical aspects of remote sensing and image processing. This is followed by a discussion of the methods for interpreting remote sensing data, and their application to soils, vegetation, and land as a whole.As the interpretation of soil conditions is based on many aspects (i.e. soil surface, vegetation, land use, land form), the scope of the book is correspondingly broad. It will therefore provide much useful information for students and scientists in soil science, geography, geology, hydrology, ecology, agriculture and civil engineering.

  • Advances in Botanical Research

    • 1 Edición
    • Volumen 13
    • Inglés

  • Mechanics of Agricultural Materials

    • 1 Edición
    • Volumen 8
    • G. Sitkei
    • Inglés
    The importance of economical production of agricultural materials, especially crops and animal products serving as base materials for foodstuffs, and of their technological processing (mechanical operations, storage, handling etc.) is ever-increasing. During technological processes agricultural materials may be exposed to various mechanical, thermal, electrical, optical and acoustical (e.g. ultrasonic) effects. To ensure optimal design of such processes, the interactions between biological materials and the physical effects acting on them, as well as the general laws governing the same, must be known.The mechanics of agricultural materials, as a scientific discipline, is still being developed, and therefore has no exact methods as yet, in many cases. However, the methods developed so far can already be utilized successfully for designing and optimizing machines and technological processes.This present work is the first attempt to summarize the calculation methods developed in the main fields of agricultural mechanics, and to indicate the material laws involved on the basis of a unified approach, with all relevant physico-mechanical properties taken into account.The book deals with material properties, gives the necessary theoretical background for description of the mechanical behaviour of these materials including modern powerful calculation methods and finally discusses a large number of experimental results. Many of them can only be found in this book. Special attention is paid to the unified approach concerning theory and practice.The systematic treatment of the material makes the book useful to a wide circle of designers, researchers and students in the field of agricultural engineering. The book can also be used as a textbook at technical and agricultural universities.

  • Food Emulsions and Foams

    • 1 Edición
    • E. Dickinson
    • Inglés
    This text explains how properties of the system are affected by such factors as the crystallisation of the fat, the surface behaviour of the proteins, and presence of various small molecules and ions in the aqueous phase.

  • Plant Polymeric Carbohydrates

    • 1 Edición
    • F Meuser + 2 más
    • Inglés
    The International Symposium on Plant Polymeric Carbohydrates, which was held as a satellite symposium of the International Carbohydrate Meeting, has become a symposium in its own right, bringing together an number of experts to exchange knowledge. This has been achieved by placing the emphasis on specific aspects of carbohydrate research in the selection and organization of the items on the programme. The aim of the symposium was to present the latest research in sub-branches of the biosynthesis and structure of polymeric carbohydrates, their rheological properties, both as pure substances and in complex bonds with other natural materials, their nutritional importance with respect to their physicochemical and nutritive properties, and their industrial applications in food and non-food.

  • Food Structure

    Creation and Evaluation
    • 1 Edición
    • J. R. Mitchell + 1 más
    • Inglés
    The book considers fundamental concepts and discusses dispersed food systems such as gels, emulsions and foams and chemical properties of food polymers. It examines structured food systems such as fibrous and non-fibrous systems, and concludes with and evaluation of food structure by microscopic, rheologic and sensor means.

  • Advances in Marine Biology

    • 1 Edición
    • Volumen 23
    • Inglés

  • Advances in Agronomy

    • 1 Edición
    • Volumen 40
    • Inglés

  • Plant Tissue Culture: Theory and Practice

    • 1 Edición
    • Volumen 5
    • S.S. Bhojwani + 1 más
    • Inglés
    Now available only in paperback, this book has been described as ``...by far the most comprehensive book on plant tissue culture...few publications in this field can compare with this book in terms of subject matter covered and literature surveyed. Overall, the book is a fine achievement for Drs. Bhojwani and Razdan. It also serves the authors' avowed purpose of integrating the theoretical and practical aspects of plant tissue culture. If you like a text and a laboratory manual on plant tissue culture combined, this is obviously a book to be considered seriously.'' (Plant Science Bulletin).Plant tissue culture has become an invaluable aid in the field of experimental botany and has many practical applications in agriculture and horticulture. In recognition of its importance in basic and applied areas of plant science, many universities have included this subject in undergraduate and postgraduate courses but find that they lack a suitable introductory text. This book has been written primarily to fill that need. Starting with an introductory history, the book covers such practical aspects as laboratory requirements and media preparation. The authors go on to discuss fundamental aspects of cellular totipotency (e.g. production of haploids, diploids and triploids, and raising new genotypes through single cell culture), in vitro approaches to plant breeding, raising high health plants, micropropagation, and techniques of in vitro storage of germplasm.Profusely illustrated with line drawings and original photographs, the book is further enhanced by the inclusion of a complete bibliography.

  • Advances in Food Research

    • 1 Edición
    • Volumen 30
    • Inglés

  • Trace Elements in Human and Animal Nutrition

    Volume 2
    • 5 Edición
    • Inglés
    The major change in the format of the fifth edition is the presentation of the book in two volumes, necessitated by the rapidly increasing knowledge of metabolism, interactions, and requirements of trace elements ... The guiding principle was to present the minimum of results that would serve as a logical foundation for the description of the present state of knowledge. Recent results of research were accommodated by devoting new chapters to the subjects "Methodology of Trace Element Research" and "Quality Assurance for Trace Element Analysis" and by expanding the discussion of lithium and aluminum in separate, new chapters. The first two subjects are of outstanding importance as determinants of future progress. The concern for the quality of analytical data motivated the authors of the individual chapters to review critically and, where necessary, revise analytical data presented in the previous editions. The rapid progress of trace analytical methodology since the mid-1970s has changed what had been accepted as normal for the concentrations of many trace elements in tissues and foods. The new data reflect the present state of the art in trace element analysis, but they may be subject to future revision.

  • Spider Mites

    • 1 Edición
    • Volumen 1B
    • Bozzano G Luisa
    • Inglés
    This two-part volume with contributions from more than 50 international specialists, provides an up-to-date text and brings together facts and views of acarologists specialized in various aspects of the biology of spider mites. The need for such a treatment of scientific progress and recommended topics for future research exists among students, commencing in the study of acarology and plant protection, as well as among those engaged in acarological research and teaching. Both books will serve to provide a synthesis of much of the knowledge on basic and applied aspects of the biology of spider mites and their natural enemies; stimulate students to analyse critically the views propounded by the authors of the book, and instigate research into environmentally safe and cost effective means of pest control.

  • Nitrogen and Energy Nutrition of Ruminants

    • 1 Edición
    • Inglés
    This comprehensive volume examines the interrelationships of nitrogen and energy nutrition of ruminants. It provides exhaustive coverage of basic concepts, applications, and new research developments.Rumen microbial activity is emphasized. The author, an expert in animal nutrition, discusses new systems of determining dietary energy requirements, the effect of processing feedstuffs, and stress factors. He reviews the availability of nutrients in grains, distillers' grain residues, oilseed meals, molasses, silages, pastures, crop residues, and aquatic plants. Growth stimulants, nutritional management of ruminants in feedlots and pastures, and the value of feed additives are also among the topics considered.The scope of coverage provided by this volume will make it the leading reference for teachers, researchers, consultants, livestock producers, feed manufacturers, and all others who are involved in ruminant feeding and nutrition.From the Preface: This volume covers research on various nitrogen and energy feedstuffs and defines terminology commonly utilized in nitrogen and energy nutrition. The utilization of nitrogen and energy in oilseed meals, fish meals, cereal grains, distillers' residues, molasses, silages, grasses, hays, crop residues, animal waste, and nonprotein nitrogen sources is discussed. Details are given on development and utilization of net energy systems, systems for balancing total nitrogen, and nonprotein nitrogen with total digestible nutrients (TDN) or energy components of ruminant diets. Discussions are presented on metabolism, feedlot, milking, and grazing trials. Growth stimulants, processing of feedstuffs, type of animal, and environmental and management factors that affect feed intake, growth, feed efficiency, and quality of product are reviewed.Emphasis is given to the contributions of ruminal microbes in upgrading forage and nonprotein nitrogen sources to higher-quality bacterial protein, as well as their ability to downgrade high-quality protein and waste nitrogen when protein is fed in excess of microbial needs. Research is presented on means to increase bypassing of the rumen to prevent nitrogen wastage when ruminants are fed concentrate diets. Contributions of ruminal microbes in utilizing cellulosic materials as lignocellulose and hemicellulose as well as starch and other carbohydrates are discussed.

  • Advances in Botanical Research

    • 1 Edición
    • Volumen 12
    • Inglés
    Advances in Botanical Research provides an up-to-date source of information for students, lecturing staff and research workers in plant sciences. The topics discussed in Volume 12 span a wide area, ranging from the biochemical mechanisms involved in the light modulation of enzyme activity, to the phylogenetic significance of the dinoflagellate chromosome. This series specializes in articles evaluating particular areas of advanced botany and as such continues to be of interest to botanists in a variety of research areas.From the Preface:The changes in enzyme activity in green plants caused by the transition from light to dark are now regarded as important regulatory processes directing metabolism towards synthesis of sugars and storage compounds in the light, and their breakdown in the dark. Light affects chloroplast enzyme activity in a number of diverse ways, through alteration of stromal pH, ion and metabolite levels. However, there are also changes in activity in some enzymes that involve post-translation (probably covalent) modification of the enzyme protein, and these are generally referred to as 'light modulation'. In her article, Anderson reviews such plant enzyme systems, the biochemical mechanisms involved (probably by reduction of a disulphide bond), their potential molecular basis and the function of modulation in photosynthetic carbon metabolism.One of the most important developments in plant molecular genetics is the rapid improvement of our understanding of the nature and mechanisms of mutation induced by transposable elements. It is interesting to reflect that the origins of this lie in our fascination for variegated plants as horticultural curiosities! Because of our increasing interest in transposable elements for exploring the genetic origins of variation, or as systems for molecular biology and genetic engineering, the review of Plant Transposable Elements by the group at the Max-Planck Institute, K"ln (Nevers, Shepherd and Saedler) is particularly welcome. How transposons will be used to isolate genes known only for their phenotypic effects will be seen in the future.The unicellular dinoflagellates are major components of marine and freshwater ecosystems. Apart from their general ecological importance, there are a number of reasons why they are of interest to biologists. In this volume we consider two such aspects. The article by Sigee discusses the very high level of DNA possessed by these organisms, the particular configuration of their chromatin and their nuclear organisation. These are of phylogenetic significance, and to summarise the position as presented in Sigee's article, it now seems that dinoflagellates are to be regarded as true eukaryotes with some prokaryote features, and that probably they are 'primitive' rather than degenerate forms of more advanced ancestors.Algae that can produce toxins effective against animals are found in three of the eight algal divisions, including the dinoflagellates. Carmichael reviews various apsects of biology and chemistry of these chemically diverse toxins, some of which can exert potent effects on humans, and considers their potential natural role. Few ideas of such ecological roles appear to have been subject to critical experimentation, and this article should provide a framework for such future work.

  • Advances in Agronomy

    • 1 Edición
    • Volumen 38
    • Inglés

  • Cell Growth, Nutrition, Cytodifferentiation, and Cryopreservation

    • 1 Edición
    • Indra Vasil
    • Inglés

  • Soil Cutting and Tillage

    • 1 Edición
    • Volumen 7
    • E. McKyes
    • Inglés
    After giving a brief history of tillage practices and implements used throughout the world dating back to ancient times, this book goes on to describe the basic soil mechanics techniques needed to calculate the forces developed in soil by simple-shaped cutting tools. The methods of measuring soil mechanical properties, water pressure in soil and shear rate effects are touched upon. A review is given of two and three dimensional soil cutting mathematical mechanics models to predict soil cutting forces and soil volumes disturbed by cutting and tillage tools, as well as the state-of-the-art of soil loosening, structural rearrangement and plant growth as affected by tillage tools. The author also includes an introduction to the analysis of traction machines. There are many numerical examples of mechanical analyses and predictions worked out in the various sections of the book as well as numerous unsolved problems at the end of a number of the chapters.Written in a textbook style, this monograph is ideal for anyone wanting to learn modern techniques for the mechanical description of soil cutting and tillage forces and soil volumes disturbed. It also provides a reference for analytical formulae and calculated force forces. It will be of interest to universities and colleges worldwide which have Agricultural Engineering Programs, Civil and Mechanical Engineering schools which specialize in soil mechanics and construction machinery as well as to research stations worldwide with interests in soil tillage, soil physics etc.

  • Advances in Marine Biology

    • 1 Edición
    • Volumen 22
    • Inglés

  • Habitat Selection in Birds

    • 1 Edición
    • Martin L. Cody
    • Inglés
    Leading researchers in behavioural ecology discuss specific aspects of this important topic including: The mechanism of habitat selection and how it operates Its relevance to population biology Behavioural and physiological implications The ecological and evolutionary significance of habitat choice and survival and reproduction in various habitat types.

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