Excited States and Free Radicals in Biology and Medicine PDF Download

Author: R. V. Bensasson
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 456

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Book Description
Excited states and free radicals are involved in the normal physiology of living systems, in pathological processes (including lipid peroxidation, inflammation, Parkinson's disease, cancer, and aging), in the mechanisms of drug action, and in the photochemotherapies such as the PUVA therapy for skin diseases and PDT for cancer. This text introduces the reader to this rapidly expanding field, one that lies at the borderlines of physics, chemistry, biology, pharmacology, and medicine. The authors explore in particular how time-resolved spectroscopic methods have found solutions at the molecular level to biological and medical problems. Topics include the nature of excited states and free radicals and the techniques for their study, activated oxygen species, DNA, proteins, carotenoids and photosynthetic reaction centers, photodermatology and melanogenesis, and aspects of cancer related to radio-, chemo-, and photodynamic therapy. Researchers and graduate students in photochemistry, photobiology, photomedicine, radiation chemistry and biology, and cancer therapies will find this book to be of very significant interest.

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: Okezie I. Aruoma
Publisher: IOS Press
ISBN: 9781586036836
Category : Medical
Languages : en
Pages : 286

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Book Description
Focuses on the pivotal roles of reactive oxygen and nitrogen species (ROS and RNS) in the pathogenesis of many clinical conditions (together with their involvement in the ageing process of lower (yeast) cells, and higher organisms including plants). This book also discusses the potential applications of dietary-derived antioxidants.

Author: Barry Halliwell
Publisher: Oxford University Press
ISBN: 0198717474
Category : Medical
Languages : en
Pages : 961

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Book Description
Free Radicals in Biology and Medicine has become a classic text in the field of free radical and antioxidant research. Now in its fifth edition, the book has been comprehensively rewritten and updated whilst maintaining the clarity of its predecessors. Two new chapters discuss 'in vivo' and 'dietary' antioxidants, the first emphasising the role of peroxiredoxins and integrated defence mechanisms which allow useful roles for ROS, and the second containing new information on the role of fruits, vegetables, and vitamins in health and disease. This new edition also contains expanded coverage of the mechanisms of oxidative damage to lipids, DNA, and proteins (and the repair of such damage), and the roles played by reactive species in signal transduction, cell survival, death, human reproduction, defence mechanisms of animals and plants against pathogens, and other important biological events. The methodologies available to measure reactive species and oxidative damage (and their potential pitfalls) have been fully updated, as have the topics of phagocyte ROS production, NADPH oxidase enzymes, and toxicology. There is a detailed and critical evaluation of the role of free radicals and other reactive species in human diseases, especially cancer, cardiovascular, chronic inflammatory and neurodegenerative diseases. New aspects of ageing are discussed in the context of the free radical theory of ageing. This book is recommended as a comprehensive introduction to the field for students, educators, clinicians, and researchers. It will also be an invaluable companion to all those interested in the role of free radicals in the life and biomedical sciences.

Author: R. V. Bensasson
Publisher: Springer Science & Business Media
ISBN: 1468412248
Category : Science
Languages : en
Pages : 460

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Book Description
Recently there have been major developments in the experimental techniques available for the study of the primary events following the absorption of ultra-violet and visible radiation by biological systems. These techniques, which include absorption, emission, resonance Raman, electron spin resonance, nuclear magnetic resonance and photoacoustic spectroscopies, can be used to study the fate of transient species with lifetimes ranging from seconds to nanoseconds and extending in some cases, such as laser flash photolysis, to pico 12 15 (10- S)- and even femtoseconds (10- s). In parallel with these developments there has been a dramatic increase in the use of light in medicine via the direct photochemical alteration of endogenous molecules (phototherapy) or via the photoactivation of drugs in the skin or other tissue (photochemotherapy). Thus neonatal hyperbili rubinaemia can be routinely treated by phototherapy and psoriasis is frequently treated by PUVA photochemotherapy. A promising new photo chemotherapy used the phototoxicity of porphyrin drugs activated by red light to destroy solid malignant tumors. While some of the overall qualitative effects of such treatments are known, only recently have we begun to understand the associated molecular mechanisms. The primary molecular processes involve short-lived species. The pur pose of this Advanced Study Institute was to review some newer experi mental techniques for the study of such species, the application of these techniques to biological and medical systems and to examine the value of such information in phototherapeutic situations.

Author: C. Sen
Publisher: Elsevier
ISBN: 0080538290
Category : Science
Languages : en
Pages : 1219

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Book Description
Interest in the science of exercise dates back to the time of ancient Greece. Today exercise is viewed not only as a leisurely activity but also as an effective preventive and therapeutic tool in medicine. Further biomedical studies in exercise physiology and biochemistry reports that strenuous physical exercise might cause oxidative lipid damage in various tissues. The generation of reactive oxygen species is elevated to a level that overwhelms the tissue antioxidant defense systems resulting in oxidative stress.The Handbook of Oxidants and Antioxidants in Exercise examines the different aspects of exercise-induced oxidative stress, its management, and how reactive oxygen may affect the functional capacity of various vital organs and tissues. It includes key related issues such as analytical methods, environmental factors, nutrition, aging, organ function and several pathophysiological processes.This timely publication will be of relevance to those in biomedical science and was designed to be readily understood by the general scientific audience.

Author: A. H. W. Nias
Publisher: John Wiley & Sons
ISBN: 9780471975908
Category : Medical
Languages : en
Pages : 408

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Book Description
This new edition of A.H.W. Nias' successful book provides an updated and revised introduction to quantitative radiobiology, particularly, to those aspects of the subject which have a practical application. Radiation is used to cure cancer but can also cause it. Radiation is also used in medical diagnosis and in nuclear power stations. In these areas, where questions of benefit and detriment arise, the biological effects of the radiation can now be predicted. There are few aspects of life where risk estimates are so firmly founded on quantitative data. This is not only because of the precision with which radiation dose can be measured but also because of the large body of radiobiological observations which have been made since X-rays were discovered. Written by a scientist with many years experience in the field, An Introduction to Radiobiology will appeal to a wide variety of readers who need to understand the mechanisms by which ionizing radiation causes cellular damage. It will be of interest to technologists in radiation therapy, nuclear medicine and diagnostic radiography, cancer research students and technicians, medical physicists, trainee radiotherapists and nuclear medicine specialists. Reviews of the First Edition: "In summary, this is an excellent general text that should fill an important gap in many teaching needs, especially those where the major focus is on the biological effects of radiation on humans." Journal of the National Cancer Institute "This is undoubtedly one of the better introductions to the subject which I have read, and I would certainly recommend it not only to beginners but also to mature students of the subject." The British Journal of Radiology

Author: A. Quintanilha
Publisher: Springer Science & Business Media
ISBN: 1475704178
Category : Science
Languages : en
Pages : 233

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Book Description
A NATO Advanced Study Institute on "Oxygen Radicals in Biological Systems: Recent Progress and New Methods of Study" was held in Braga, Portugal between Sep tember 1 and September 14, 1985, in order to consider the basic chemistry and biochem istry of activated oxygen (both radical and non-radical species) and their effect in biolog ical systems. This book summarizes the main lectures given at this meeting. While there is no attempt to cover all the major topics in the expanding subject of oxidative mechanisms in biology, an effort has been made to provide overviews on some key aspects of this field. The authors have attempted to convey a clear picture of both what is known and what remains unclear in their respective subjects. Not only are some of the techniques used for detecting activated oxygen species described, but also their strengths and limi tations. The chemistry of many of these species is discussed and the biological and/or pathological implications are carefully reviewed. The medical and therapeutic aspects of some of the well established pathways of damage and protection are analyzed. It is our hope that the material included in this book might be useful for both researchers and teachers at the graduate level. The success of this meeting was to a large extent due to the tireless committment of Professor Alberto Amaral and Dr. Concei~a:o Rangel; without their outstanding efforts in dealing with all the aspects of the organization, this summer school would not have been possible.

Author: Ismail Laher
Publisher: Springer
ISBN: 9783642300172
Category : Medical
Languages : en
Pages : 0

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Book Description
The focus of this collection of illustrated reviews is to discuss the systems biology of free radicals and anti-oxidants. Free radical induced cellular damage in a variety of tissues and organs is reviewed, with detailed discussion of molecular and cellular mechanisms. The collection is aimed at those new to the field, as well as clinicians and scientists with long standing interests in free radical biology. A feature of this collection is that the material also brings insights into various diseases where free radicals are thought to play a role. There is extensive discussion of the success and limitations of the use of antioxidants in several clinical settings.

Author: Albert Szent-Gyorgyi
Publisher: Elsevier
ISBN: 0323161014
Category : Science
Languages : en
Pages : 153

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Book Description
Introduction to a Submolecular Biology focuses on the study of the electronic interactions of biological molecules. This book discusses the energy cycle of life, units and measures, electronic mobility, and problems of charge transfer. The three examples of charge transfer—quinone-hydroquinone, riboflavine (FMN) and serotonin, and cortisone I2 are elaborated. This text deliberates the problems and approaches on the mechanism of drug action, adenosine triphosphate (ATP), chemistry of the thymus gland, and living state. Brief remarks on water, ions, and metachromasia are also included. Other topics covered include the redox potentials, ionization potentials and electron affinities, orbital energies, electromagnetic coupling resonance transfer of energy, and semiconduction. This publication is a good source for biochemists, biologists, and specialists aiming to acquire basic knowledge of submolecular biology.