Oxygen Radicals in Chemistry and Biology PDF Download
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Author: Wolf Bors
Publisher: Walter de Gruyter
ISBN: 3110866536
Category : Reference
Languages : en
Pages : 1052
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Book Description
Author: Wolf Bors
Publisher: Walter de Gruyter
ISBN: 3110866536
Category : Reference
Languages : en
Pages : 1052
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Book Description
Author: M. A. J. Rodgers
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 842
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Book Description
Author: Michael Simic
Publisher: Springer Science & Business Media
ISBN: 1468455680
Category : Science
Languages : en
Pages : 1064
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Book Description
This book is based on the papers presented at the "Fourth International Congress on Oxygen Radicals (4-ICOR)," held June 27 - July 3, 1987, at the University of California, La Jolla. The chapters deal with the phenomena associated with highly reactive oxygen species (hydroxy, peroxy, alkoxy, aroxy, and superoxide radicals, as well as singlet oxygen) and their peroxidation products (hydrogen peroxide, hydroperoxides, peroxides, and epoxides) as they relate to the fields of chemistry, food technology, nutrition, biology, pharmacology, and medicine. The kinetics, energetics, and mechanistic aspects of the reactions of these species and the interrelationship of oxygen radicals (or any other free radicals) and peroxidized products have been emphasized. Special attention is focused on the mechanisms of the generation of free radicals and peroxy products in biosystems and on the adverse effects of these radicals and products in humans. The topics span the continuum from the simple chemistry of model systems to the complex considerations of clinical medicine. The book also explores the mechanisms of agents that protect against free radicals and peroxy products in vitro and in vivo. These agents include antioxidants used in materials, food antioxidants, physiological antioxidants, and antioxienzymes (SOD, glutathione peroxidase, and catalases). The use of these inhibitors to prevent damage to organs being prepared for transplantation, thereby maintaining the quality of transplanted organs and/or extending their "shelf-life," also is examined.
Author: Johannes Everse
Publisher: CRC Press
ISBN: 9780849369643
Category : Medical
Languages : en
Pages : 280
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Book Description
The second of two relatively independent volumes on the chemistry and biology of peroxidases. Volumes 2 covers the peroxidases isolated from plants and microorganisms, and includes detailed discussions of some of the unique reactions catalyzed by these enzymes. Volume one covered the peroxidases isolated from animal sources, as well as the "pseudo- peroxidase activity" of prostaglandin H synthase and of myoglobin and hemoglobin. Acidic paper. Annotation copyrighted by Book News, Inc., Portland, OR
Author: Donald T. Sawyer
Publisher: Oxford University Press
ISBN: 0195363329
Category : Science
Languages : en
Pages : 236
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Book Description
This book places oxygen on the center stage of chemistry in a manner that parallels the focus on carbon by 19th century chemists. One measure of the significance of oxygen chemistry is the greater diversity of oxygen-containing molecules than of carbon-containing molecules. One of the most important compounds is water, containing the properties of being a unique medium for biological chemistry and life, the source of all the dioxygen in the atmosphere, and the moderator of the earth's climate. Sawyer first introduces the biological origins of dioxygen and role of dioxygen in aerobic biology and oxidative metabolism, and in separate chapters discusses the oxidation-reduction thermodynamics of oxygen species, and the nature of the bonding for oxygen in its compounds. Additional chapters focus on the reactivities of specific oxygen compounds. The book will be of interest to chemists and biochemists, as well as graduate students, life scientists, and medical researchers.
Author: Roberto RodrÃguez
Publisher: Springer Science & Business Media
ISBN: 1468457608
Category : Science
Languages : en
Pages : 425
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Book Description
For many, the terms aging, maturation and senescence are synonymous and used interchangeably, but they should not be. Whereas senescence represents an endogenously controlled degenerative programme leading to plant or organ death, genetiC aging encompasses a wide array of passive degenerative genetiC processes driven primarily by exogenous factors (Leopold, 1975). Aging is therefore considered a consequence of genetiC lesions that accumulate over time, but by themselves do not necessarily cause death. These lesions are probably made more severe by the increase in size and complexity in trees and their attendant physiology. Thus while the withering of flower petals following pollination can be considered senescence, the loss of viability of stored seeds more clearly represents aging (Norden, 1988). The very recent book "Senescence and Aging in Plants" does not discuss trees, the most dominant group of plants on the earth. Yet both angiospermic and gymnospermic trees also undergo the above phenomena but less is known about them. Do woody plants senesce or do they just age? What is phase change? Is this synonymous with maturation? While it is now becoming recognized that there is no programmed senescence in trees, senescence of their parts, even in gymnosperms (e. g. , needles of temperate conifers las t an average of 3. 5 years), is common; but aging is a readily acknowledged phenomenon. In theory, at least, in the absence of any programmed senescence trees should -live forever, but in practice they do not.
Author: Robert A. Greenwald
Publisher: CRC Press
ISBN: 135108982X
Category : Medical
Languages : en
Pages : 648
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Book Description
This volume is divided into five sections. Section I deals with preparative methodology for isolation and purification of the components of the oxy radical experimental systems use most frequently, including all three forms of SOD and several other important scavengers. Section II provides the experimenter with a choice of a dozen oxy radical generating systems which can be used for testing of scavengers or for evaluation of the effects of oxy radicals on target tissues. The reader will note that in this section, as well as in most of the rest of the volume, the orientation is primarily biochemical, biologic, and medical, rather than pure chemistry or pure physics. Nevertheless, the techniques are widely applicable to a variety of disciplines.
Author: Igor B. Afanas'ev
Publisher: CRC Press
ISBN: 9780849354519
Category : Science
Languages : en
Pages : 304
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Book Description
The chemical properties of superoxide ion, its biological role, and the role of other oxygen radicals which arise as a result of its transformations are contained in this text. In Volume I the principal reactions of superoxide ion, including protonation reactions with proton donors, nucleophilic reactions with esters, alkyl halides and other compounds, electron transfer reactions with quinones and metal complexes, are described. Basic quantitative data including rate constants and yields for the reactions of superoxide ion of all types are given in tables. This volume contains the mechanisms of the generation of oxygen radicals in cells and the interaction of superoxide ion with cell components. The role of superoxide ion in lipid peroxidation and destruction of proteins and nucleic acids is explained, as well as oxygen radicals in the mechanisms of toxic and therapeutic action of drugs, especially anticancer antibiotics. In addition, the action of superoxide ion and other oxygen radicals on plants, micro-, and macroorganisms is discussed, along with the role of oxygen radicals in normal metabolic and pathological processes.
Author: Christopher S. Foote
Publisher: Springer Science & Business Media
ISBN: 9400708742
Category : Science
Languages : en
Pages : 355
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Book Description
Taking an interdisciplinary approach, this book and its counterpart, Active Oxygen in Biochemistry, explore the active research area of the chemistry and biochemistry of oxygen. Complementary but independent, the two volumes integrate subject areas including medicine, biology, chemistry, engineering, and environmental studies.
Author: John Caldwell
Publisher: Elsevier
ISBN: 0323150101
Category : Nature
Languages : en
Pages : 444
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Book Description
Biological Basis of Detoxication focuses on the biological processes involved in detoxication, with emphasis on the biochemistry of the removal of xenobiotics from an organism. Topics range from the formation of toxic metabolites and compounds that are not metabolized at all to the tissue distribution and nutritional considerations, the kinetics and mechanisms of the metabolic and excretory processes, and the integration of xenobiotic metabolism in the activation and detoxication of carcinogens. Organized into 14 chapters, this book begins with an overview of the enzymatic basis for the metabolic activation of foreign compounds in forming reactive chemical intermediates. The first few chapters discuss the identification of reactive electrophiles derived from xenobiotics, intratissue distribution of activating and detoxicating enzymes, enzymatic and non-enzymatic modes of xenobiotic metabolism, and unmetabolized compounds. The middle chapters explore the biological basis of detoxication of oxygen free radicals, physiologic and kinetic aspects of the fate of xenobiotics, excretion of xenobiotics, and effects of nutrition on detoxication. The remaining chapters look at the relationships between the enzymes of detoxication and host defense mechanisms, metabolic basis of target organ toxicity, the enzymatic factor in selective toxicity, and intraindividual and interindividual variations in rates of hepatic metabolism of exogenous chemicals. Pharmacologists, toxicologists, and biochemists will find this book highly informative.
