Lipid Oxidation


Book Description

In this second edition, Edwin Frankel has updated and extended his now well-known book Lipid oxidation which has come to be regarded as the standard work on the subject since the publication of the first edition seven years previously. His main objective is to develop the background necessary for a better understanding of what factors should be considered, and what methods and lipid systems should be employed, to achieve suitable evaluation and control of lipid oxidation in complex foods and biological systems. The oxidation of unsaturated fatty acids is one of the most fundamental reactions in lipid chemistry. When unsaturated lipids are exposed to air, the complex, volatile oxidation compounds that are formed cause rancidity. This decreases the quality of foods that contain natural lipid components as well as foods in which oils are used as ingredients. Furthermore, products of lipid oxidation have been implicated in many vital biological reactions, and evidence has accumulated to show that free radicals and reactive oxygen species participate in tissue injuries and in degenerative disease. Although there have been many significant advances in this challenging field, many important problems remain unsolved. This second edition of Lipid oxidation follows the example of the first edition in offering a summary of the many unsolved problems that need further research. The need to understand lipid oxidation is greater than ever with the increased interest in long-chain polyunsaturated fatty acids, the reformulation of oils to avoid hydrogenation and trans fatty acids, and the enormous attention given to natural phenolic antioxidants, including flavonoids and other phytochemicals.




Autoxidation in Food and Biological Systems


Book Description

The material presented in this book deals with basic mechanisms of free radical reactions in autoxidation processes and anitoxidant suppression of autoxidation of foods, biochemical models and biologi cal systems. Autoxidation in foods and corresponding biological effects are usually approached separately although recent mechanistic developments in the biochemistry and free radical chemistry of per oxides and their precursors tend to bring these two fields closer. Apparent ability of antioxidants in diets to reduce the inci dence of cancer has resulted in scrutiny of autoxidized products and their precursors as possibly toxic, mutagenic and carcinogenic agents. Mechanisms of any of these effects have been barely ad dressed. Yet we know now that free radicals, as esoteric as they were only a few decades ago, are being discovered in foods, biochem ical and biological systems and do play a role in the above-mentioned causalities. The purpose of the Workshop and the resulting book was to give a unifying approach towards study of beneficial and deleterious effects of autoxidation, based on rigorous scientific considerations. It is our hope that the material presented in this book will not only provide a review of the "state of the art" of autoxidation and anti oxidants, but also reflect the interaction which occurred during the Workshop between workers using model sytems, and food and biological systems.




Lipid Oxidation in Food


Book Description

Developed from a symposium at the 202nd National Meeting of the ACS, New York City, August 1991, this volume contains 20 papers in the areas of mechanisms of free-radical processes, prevention of lipid oxidation, methodologies for assessing lipid oxidation products, and processing effects on lipid oxidation. Commodities covered include beef, pork, fresh and saltwater fish, peanuts, vegetable oils, and baby foods. Annotation copyright by Book News, Inc., Portland, OR
















Lipid Oxidation Pathways


Book Description

Autoxidation of unsaturated lipids has received much attention because it has many applications in the rancidity of foods and stability of lipids in biological tissues and compartments. This book reviews state-of-the-art developments in the understanding of the oxidation of lipids and its connection with the oxidation of other biological molecules such as proteins and starch. The various chapters illustrate the special features associated with different lipids, antioxidants, reaction conditions, and lipids environments. The material in this book provides a better understanding of lipid oxidation pathways.




Lipid Oxidation Products


Book Description

This book describes the photooxidation and autoxidation of the lipid components of phototrophic organisms. These two processes, which act intensively during the senescence of phototrophs, have been relatively neglected in the relevant literature. The text details the mechanisms involved in type-II photosensitized oxidation and free radical oxidation (autoxidation) of the main unsaturated lipids, with a close focus on the specificity of the oxidation products formed and their potential to serve as tracers of these processes. It then discusses the effects of temperature and solar irradiance on the efficiency of type-II photooxidation processes, and looks at the possibility of photooxidative damage transferring into non-phototrophic material. The book ends with a detailed description of potential interactions between biotic and abiotic degradation processes, which, although very complex, must absolutely be factored in when studying the fate of organic matter in the environment.