الصفحة 1
الصفحة 1
Nutrient Cycling in Terrestrial Ecosystems
The first part of the book presents the fundamentals of nutrient cycling. Topics included are cycling of carbon, nitrogen, phosphorus, sulphur and micronutrients. The second part discusses nutrient cycling at an ecosystem scale, covering cropping systems, pastures, natural grasslands, arid lands, tundras and forests. The final chapter reviews current models of nutrient cycling.
Nutraceuticals and bone health
Here is an informative volume on the importance of nutraceuticals and herbal remedies for bone health. It explains the probable mechanisms of nutraceuticals for the prevention, treatment, and management of bone-related diseases as well as their curable effects on bone injuries. The volume covers the progression and development of bones, which is a multifaceted process that requires an endless and ample supply of nutrients, such as calcium, phosphorus, potassium, protein, vitamin D, magnesium, and fluoride. The book delves into the beneficial effects of nutraceuticals on overall bone health and for the treatment of bone disorders such as osteoporosis, bone fractures, scoliosis and related complications, rheumatoid arthritis, Paget’s disease, bursitis, gout, and carpal tunnel syndrome. It also addresses the use of nutraceuticals for inflammatory deformities and rickets.
New Aspects in Phosphorus Chemistry V
The use of polyphosphazenes as fluoroelastomers, flame retardants and self-extinguishing macromolecules, polymeric ionic conductors, biomaterials, and photosensitive polymeric compounds is outlined. This volume,as well as the four precedent volumes,describes only in part the huge number of original papers on phosphorus-related topics. Some further volumes will be necessary in the future to cover all aspects of this chemistry in perpetual rebirth.
Modern Aspects of Electrochemistry ; Vol. 38
Solid State Electrochemistry encompassing modern equilibria concepts, thermodymanics and kinetics of charge carriers in solids.,Electron transfer processes, with special sections devoted to hydration of the proton and its heterogeneous transfer.Electrosorption at electrodes and its relevance to electrocatalysis and electrodeposition of metals,The behavior of Pt and other alloy electrocatalyst crystallites used as the electrode materials for phosphoric acid electrolyte fuel-cells.Applications of reflexology and electron microscopy to the materials science aspect of metal electrodes.Electroplating of metal matrix composites by codeposition of suspended particles, a process that has improved physical and electrochemical properties.
Microorganisms in soils : Roles in genesis and functions
The following key topics are covered: Microorganisms in bioerosion, humification, mineralization and soil aggregation; Microbial energetics and microbes in biogeochemical processes such as carbon and nitrogen cycles and phosphorus bio-availability; Interactions in the mycorrhizosphere, e.g. between mycorrhizal fungi and bacteria; Impact of microbes on plant nutrient cycling and the possible effects of transgenic rhizospheres on soil fungi; Functions of microbes in specific soil compartments such as soil surface or toxic metal polluted soils; Regulation of microbial activities in functional domains that are influenced by biotic or abiotic factors; Use of marker genes and isotopes as examples for modern techniques in soil microbiology.
Il senso e la narrazione = The sense and the narration
Humans are creatures of narration: infinitely they narrate and narrate themselves, intertwine dialogues, light up stories to illuminate the dark caves of the heart and the world, recover and transmute memories. We live between a firm and rough, unknowable reality, an enormous furnace of perturbations and calls and colors, and an elusive, delicate and ephemeral interiority: and between the two, between the world and us, we weave with thought and with words a fragile ponte, a bridge called sense. Swing this bridge at the unequal breath of a cosmic wind, dropping phosphoric fragments: sudden hourglasses, anonymous centaurs, sleepless geometers, distant syllogisms, vanished lineages, black basalts, crazy anchorites, silent plesiosaurs, flutes and bagpipes ... and they recompose figures, and we ask ourselves questions about those figures and tell stories. Only the vertigo of asking and narrating can give meaning to a life that some say is interwoven with pure chance. Forever detached from the flourishing matrix of the world, tormented by thought, prisoners of words, slaves of interpretation, lost in a long corridor of facing mirrors: we are at the center of a great, incomprehensible rumble.
Handbook of soil analysis : Mineralogical, organic and inorganic methods
This new book by Marc Pansu and Jacques Gautheyrou provides a synopsis of the analytical procedures for the physicochemical analysis of soils. It is written to conform to analytical standards and quality control. It focuses on mineralogical, organic and inorganic analyses, but also describes physical methods when these are a precondition for analysis. It will help a range of different users to choose the most appropriate method for the type of material and the particular problems they have to face. The compiled work is the product of the experience gained by the authors in the laboratories of the Institute of Research for Development (IRD) in France and in tropical countries, and includes an extensive review of the literature. The reference section at the end of each chapter lists source data from pioneer studies right up to current works, such as, proposals for structural models of humic molecules, and itself represents a valuable source of information.
Eutrophication Management and Ecotoxicology
This book aims to bridge the gap between ecotoxicology and limnology. The intended readers of the book are water managers, policy makers with a scientific background as well as researchers/advisors in the area of water management. The book provides an ecotoxicological perspective on lake management and describes eutrophication of shallow, temperate lakes. It surveys the influence of toxic substances (e.g., agricultural pesticides) on the aquatic ecosystem, especially the relation between algae and daphnids. The message of the book is that nutrients such as phosphorus are not the only important factor in explaining and managing eutrophication: toxic disturbance of to-down control is also an important factor to be considered. The results of extensive studies and experiments (some unpublished) on lake eutrophication are presented in this book.
CO-ENZYME Q10
Coenzyme Q10 (CoQ10) is a fat-soluble compound that is synthesized by the body and can be obtained from the diet. Co-Q10 plays a central role in mitochondrial oxidative phosphorylation and the production of adenosine triphosphate (ATP). It also functions as an antioxidant in cell membranes and lipoproteins. Endogenous synthesis and dietary intake provide sufficient C0- Q10 to prevent deficiency in healthy people, although coenzyme Q10 concentrations in tissues decline with age. Oral supplementation of coenzyme Q10 increases coenzyme Q10 concentrations in plasma and lipoproteins. Oral high-dose co- Q10 is usually effective to treat mitochondrial disorders that are caused by mutations in coenzyme Q10 biosynthetic genes.
Marine Eutrophication in Perspective : On the Relevance of Ecology for Environmental Policy
Is ecological knowledge relevant for environmental policy and if so, to what extent and in what way? These are some of the basic questions addressed in this book. Triggered by a series of oxygen depletion events in German, Danish and Swedish coastal waters at the beginning of the 1980s, international policies to reduce inputs of nitrogen and phosphorus to the North Sea were agreed upon by the North Sea states. The book provides a critical analysis of the role, scientists and scientific information, as well as civil servants, have played in the formulation and implementation of these decisions.
Mannitol : Chemistry, Uses and Potential Side Effects
Presents topical research in the study of the chemistry, uses and potential side effects of mannitol. Topics discussed include the utilization and production of D-mannitol by bacteria; concentration of mannitol and other soluble carbohydrates in the crustose lichen rhizocarpon geographicum; disease-related changes and mannitols use for clinical disorders; use of mannitol in thermal energy storage applications; and chiral phosphorous ligands derived from D-mannitol.
Lake Verevi, Estonia : A highly stratified hypertrophic lake
The present book summarises investigations on Lake Verevi (surface 12.6 ha, mean depth 3.6 m). The seventeen articles in this issue deal with a wide range of questions, starting with a holistic overview of the ecological status, over assessments of long-term changes in biotic and abiotic conditions and finishing with proposed restoration plans. Abiotic chapters provide calculations on water and mass balance, distribution and fractions of phosphorus in the sediment, optical properties and penetration of radiation in the water column, sedimentation rate during the formation of stratification, and nitrogen circulation characteristics.
Class 2 Transferases VIII : EC 2.6.1.58 - 2.7.1.37
Springer Handbook of Enzymes provides data on enzymes sufficiently well characterized. It offers concise and complete descriptions of some 5,000 enzymes and their application areas. Data sheets are arranged in their EC-Number sequence and the volumes themselves are arranged according to enzyme classes. This new, second edition reflects considerable progress in enzymology: many enzymes are newly classified or reclassified. Each entry is correlated with references and one or more source organisms. New datafields are created: application and engineering (for the properties of enzymes where the sequence has been changed). The total amount of material contained in the Handbook has more than doubled so that the complete second edition consists of 39 volumes as well as a Synonym Index.
Class 2 · Transferases IV EC 2.4.1.1. -2.4.1.89 ; Vol.31
Springer Handbook of Enzymes provides data on enzymes sufficiently well characterized. It offers concise and complete descriptions of some 5,000 enzymes and their application areas. Data sheets are arranged in their EC-Number sequence and the volumes themselves are arranged according to enzyme classes. This new, second edition reflects considerable progress in enzymology: many enzymes are newly classified or reclassified. Each entry is correlated with references and one or more source organisms. New datafields are created: application and engineering (for the properties of enzymes where the sequence has been changed). The total amount of material contained in the Handbook has more than doubled so that the complete second edition consists of 39 volumes as well as a Synonym Index. In addition, starting in 2009, all newly classified enzymes are treated in Supplement Volumes.
Chiral Diazaligands for Asymmetric Synthesis
The use of phosphine derivatives has historically induced the tremendous development of catalysis (both non-asymmetric and asymmetric). Although the chemistry of amines is more documented, the use of nitrogen-containing ligands only appeared recently. Nevertheless, during the last ten years, the results describing chiral diamine preparations and their uses in asymmetric catalysis and synthesis are increasing faster than their phosphorus counterparts. The reader will find in this volume the most recent methods for the synthesis of chiral diamines as well as their applications in asymmetric catalysis of CC bond formation. Particular attention will be given to spartein and derivatives of such diamines. Recently, the particular properties and the chemistry of amines allowed to obtain catalysts easy to separate and recycle and new types of ligands such as diaminocarbenes, ureas and thioureas. Finally, the complexing properties of some diamines allowed the formation of complexes with chirality "at the metal " which is of major theoretical interest and presents numerous potential applications.
Changing Land Use Patterns in the Coastal Zone : Managing Environmental Quality in Rapidly Developing Regions
Coastal ecosystems make up some of the most important, yet most endangered, regions in the world. The protection of the unique processes that take place in these ecosystems requires that partnerships be formed among ecologists, resource managers, and planners. Experienced in the challenges of coastal system analysis, the contributors to this book provide multidisciplinary guidance on the assessment and management of environmental impacts caused by development. Each chapter examines an issue important to these fragile ecosystems, first presenting a non-technical summary of the issue and a review of the current state of the knowledge, then following with data and a more detailed consideration of the topic.
Carbon in the Geobiosphere : Earth's outer shell
Carbon and carbon dioxide always played an important role in the geobiosphere that is part of the Earth’s outer shell and surface environment. The book’s eleven chapters cover the fundamentals of the biogeochemical behavior of carbon near the Earth’s surface, in the atmosphere, minerals, waters, air-sea exchange, and inorganic and biological processes fractionating the carbon isotopes, and its role in the evolution of inorganic and biogenic sediments, ocean water, the coupling to nutrient nitrogen and phosphorus cycles, and the future of the carbon cycle in the Anthropocene. This book is mainly a reference text for Earth and environmental scientists; it presents an overview of the origins and behavior of the carbon cycle and atmospheric carbon dioxide, and the human effects on them. The book can also be used for a one-semester course at an intermediate to advanced level addressing the behavior of the carbon and related cycles.
Biophysical Aspects of Transmembrane Signaling
Transmembrane signaling is one of the most significant cell biological events in the life and death of cells in general and lymphocytes in particular. Until recently biochemists and biophysicists were not accustomed to thinking of these processes from the side of a high number of complex biochemical events and an equally high number of physical changes at molecular and cellular levels at the same time. Both types of researchers were convinced that their findings are the most decisive, having higher importance than the findings of the other scientist population. Both casts were wrong. Life, even at cellular level, has a number of interacting physical and biochemical mechanisms, which finally build up the creation of an "excited" cell that will respond to particular signals from the outer or inner world.
Binary Rare Earth Oxides
The book begins with a brief introduction to binary rare earth oxides, their physical and chemical stabilities, polymorphism, crystal structures and phase transformation and the association with current applications. The book goes on to present the band structure of the oxides using several quantum chemical calculations, which belong to a newly developed area in the binary rare earth oxides. Central to this chapter are the characterizations of electrical, magnetic and optical properties, as well as details of single crystal growth and particle preparation methods that have progressed in recent years. Later chapters concentrate on thermo-chemical properties and trace determination techniques. The final chapter contains a variety of useful applications in various fields such as phosphors, glass abrasives, automotive catalysts, fuel cells, solid electrolytes, sunscreens, iron steels, and biological materials.
Advances in Integrated Soil Fertility Research in sub-Saharan Africa : Challenges and Opportunities
Food insecurity is a central concern and a fundamental challenge for human welfare and economic growth in Africa. Low agricultural production, results in low incomes, poor nutrition, vulnerability to risks and lack of empowerment. Land degradation and soil fertility depletion are considered the major threats to food security and natural resource conservation in sub-Saharan Africa (SSA). Investments in technology, policy and institutional reforms are needed to increase agricultural productivity to ensure food security and sustained national economies. Past research has generated numerous soil fertility management technologies which if adopted could propel the African continent out of the poverty trap. However, these technologies have had little, if any, impact due to low adoption by the smallholder farmers.
