Oxidants, like other aspects of life, involves tradeoffs. Oxidants, whether intentionally produced or by-products of normal metabolism can either mediate a variety of critical biological processes but when present inappropriately cause extensive damage to biological molecules (DNA, proteins, and lipids). These effects can lead to either damage that is a major contributor to aging and degenerative diseases (or to other diseases such as cancer, cardiovascular disease, immune-system decline, brain dysfunction, and cataracts) or normal physiological function- tissue repair, defense against pathogens and cellular proliferation. On the other hand the body is equipped with a complex antioxidant/oxidant handling system which includes both enzymatic and nonenzymatic (i.e. small molecules such as flavonoids, ascorbate, tocopherol, and carotenoids) produced endogenously or derived from the diet. This book focuses on how the same molecules can have favorable or noxious effects depending on location, level and timing. Each chapter focuses on one particular molecule or oxidant/antioxidant system and provides a state of the art review of the current understanding regarding both positive and negative actions of the system under review.

Are free radicals and reactive oxygen species relevant to dermatopathology? Do antioxidants protect against free-radical-mediated cutaneous diseases and aging? To these and further current questions in the rapidly progressing field of basic and applied skin research, this up-to-date volume provides a scientific basis. It presents state-of-the-art reviews on the progress in detection of free radicals and antioxidants and their responses to environmental oxidative stressors. Furthermore, several expert contributions focus on the exciting developments in oxidative DNA damage and UVB- and UVA-induced signal transduction in skin. Finally, information is given on new antioxidant protection strategies against skin carcinogenesis and skin aging which may be fundamental for the pharmaceutical or skin-care products of tomorrow. Due to its unique and up-to-date collection of state-of-the-art contributions by many of the world's leading scientists in the field, this book will be essential reading for dermatologists, cosmetologists, pharmacologists and environmental toxicologists.

Food antioxidants are of primary importance for the preservation of food quality during processing and storage. However, the status of food depends on a balance of antioxidants and prooxidants occurring in food. Food Oxidants and Antioxidants: Chemical, Biological, and Functional Properties provides a single-volume reference on the effects of natur

In our first protocols book, Free Radical and Antioxidant Protocols (1), r- erence to in vivo, ex vivo, or in situ techniques were few compared to classical biochemical assays and only 6 of the 40 chapters were concerned with these applications. In our second book, Oxidative Stress Biomarkers and Antioxidant Protocols (2), which is being published concurrently with this third volume, Oxidants and Antioxidants: Ultrastructure and Molecular Biology Protocols, the number of such chapters has increased. The literature dealing with histoche- cal/cytochemical and immunohistochemical techniques and staining to identify cellular/subcellular sites of oxidative stress has expanded rapidly, as has the molecular biology methodology used to analyze free radical and antioxidant (AOX) reactions, as well as the monitoring of living tissue. A two-way search was performed for each technique listed in Table 1, coupled with “oxidative stress” using the PUBMED search engine from the National Library of Medicine at NIH. Most of the techniques involved in m- suring oxidative stress employ molecular biology or ultrastructural approaches. Of these techniques, histology, polymerase chain reaction, and Western blotting are the most widely used. Several forms of therapy are now available for patients with increased oxidative stress. In addition to standard antioxidant therapy supplementation in vivo and in vitro, photodynamic therapy (PDT) employs excitation of a photon-emitting compound delivered systemically for free radical-mediated necrosis of affected tissues, and stem cells are also being used to induce signaling events or replace antioxidant enzymes.

Providing a comprehensive review of reactions of oxidation for different classes of organic compounds and polymers, and biological processes mediated by free radicals, Oxidation and Antioxidants in Organic Chemistry and Biology puts the data and bibliographical information you need into one easy-to-use resource. You will find up-to-date information

Oxidative Stress is intended as an in-depth account of knowledge and problems in the field of oxygen-related damage in biological systems. The topics range from an assessment of molecular events in in vitro model systems to complex problems in clinical medicine. Organized into two parts with a total of 18 chapters, this book begins with an introduction to oxidative stress, elucidating specific topics on reactive oxygen species, detoxification system, and nature of oxidative damage. The first part focuses on models used with cells and tissues in the study of oxidative stress, whereas the second part describes the processes elicited by oxidative stress.

Designed to help all those who need to prevent or control oxidation, especially in food products, or to understand the properties of antioxidants in food, nutrition, health and medicine, this title covers chapters such as the chemistry of antioxidation, antioxidant action in multi-phase systems, antioxidants in biology, and among other topics. The field of antioxidants has expanded over the last six decades into a wide variety of multi-disciplinary areas that impact foods and health. Antioxidants in food and biology: Facts and fiction is a handbook designed to help all those who need to prevent or control oxidation, especially in food products, or to understand the properties of antioxidants in food, nutrition, health and medicine. It conveys the complexity of antioxidant chemistry by providing an appreciation of the various phenomena that affect oxidation and its inhibition in foods and biological systems. Beginning with the underlying chemistry, the book moves on to explain how the activity of antioxidants is affected at the interface of complex multiphase lipid systems and to discuss the problems of evaluating the activities of antioxidants in foods and biological systems. After reviewing the antioxidants present in various foods, the author addresses the hypothesis that the health of an individual is influenced by the efficiency of various protection systems against oxidant damage. He also considers whether or not additional or more effective natural antioxidants are needed in our diet to reduce oxidative stress from dietary and environmental factors, and to thus reduce the risk of cardiovascular disease.