Lipid Oxidation

Lipid Oxidation PDF
Author: Edwin N. Frankel
Publisher: Elsevier
Category : Science
Languages : en
Pages : 488
View: 4604

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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.


Lipid Oxidation

Lipid Oxidation PDF
Author: Amy S. Logan
Publisher: Elsevier
Category : Science
Languages : en
Pages : 548
View: 490

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Book Description:
Lipid oxidation in food systems is one of the most important factors which affect food quality, nutrition, safety, color and consumers’ acceptance. The control of lipid oxidation remains an ongoing challenge as most foods constitute very complex matrices. Lipids are mostly incorporated as emulsions, and chemical reactions occur at various interfaces throughout the food matrix. Recently, incorporation of healthy lipids into food systems to deliver the desired nutrients is becoming more popular in the food industry. Many food ingredients contain a vast array of components, many of them unknown or constituting diverse or undefined molecular structures making the need in the food industry to develop effective approaches to mitigate lipid oxidation in food systems. This book provides recent perspectives aimed at a better understanding of lipid oxidation mechanisms and strategies to improve the oxidative stability of food systems. Five chapters on naturally-derived antioxidants that focus on applications within food systems Contributors include an international group of leading researchers from academic, industrial, and governmental entities Discusses the oxidative stability of enzymatically produced oils and fats Provides overviews on the complexities of lipid oxidation mechanisms, and emulsion systems most suseptible to rapid lipid oxidation


Lipid Oxidation In Food

Lipid Oxidation in Food PDF
Author: Allen J. St. Angelo
Publisher: Amer Chemical Society
Category : Technology & Engineering
Languages : en
Pages : 364
View: 3118

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Book Description:
Discusses the mechanisms of free radical oxidation and their control through critical chemical interactions. Includes coverage of how hydroperoxides resulting from lipid oxidation may adversely affect flavor, aroma, taste, nutritional value, and overall food quality. Examines mechanisms of free-radical processes, prevention of lipid oxidation, methodology, processing effects on lipid oxidation, and descriptive sensory analysis. Commodities covered include: beef, pork, fresh and saltwater fish, peanuts, vegetable oils, and baby foods.


Lipid Oxidation In Health And Disease

Lipid Oxidation in Health and Disease PDF
Author: Corinne M. Spickett
Publisher: CRC Press
Category : Medical
Languages : en
Pages : 440
View: 3167

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Book Description:
Oxidative modification of lipids and phospholipids—including radical damage, halogenation, and nitration—result in significant changes to the chemical properties of the molecules, which in turn have a major effect on their biochemical functions. Lipid oxidation has long been regarded as a deleterious process responsible for lipid rancidity, loss of function, and generation of toxic products. However in recent years, research has also focused on the non-detrimental physiological and pathological effects of these chemical reactions. Lipid Oxidation in Health and Disease provides an up-to-date review of the role of oxidized lipid products in physiological and pathophysiological processes. Covering the diverse topics that contribute to research in this important field, this book explores: The mechanisms of lipid oxidation, both enzymatic and non-enzymatic Antioxidant defenses and lipid oxidation Lipid oxidation products and cell signaling The roles of oxidized lipids in specific diseases—including cardiovascular, neurodegenerative, and metabolic disorders, as well as in cancer Drug targeting and the therapeutic potential of oxidized lipids Accurate measurement of the formation of lipid oxidation products and investigation of their biological effects and roles in disease are critical to biomedical science and new targeted therapeutics. Written by acknowledged experts in the field, this book provides a broad survey of both established knowledge and recent findings on the action of oxidized lipid products on cell signaling and gene expression in health and disease.


Advances In Nmr Spectroscopy For Lipid Oxidation Assessment

Advances in NMR Spectroscopy for Lipid Oxidation Assessment PDF
Author: Hong-Sik Hwang
Publisher: Springer
Category : Technology & Engineering
Languages : en
Pages : 59
View: 422

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Book Description:
This Brief provides a comprehensive overview of NMR spectroscopy, covering techniques such as 1H, 13C, and 31P NMR, which are reliable tools to determine lipid oxidation level, to identify oxidation products, and to elucidate oxidation mechanism. The Brief shows that 1H NMR spectroscopy continually demonstrates reliability, accuracy, convenience, and advantages over conventional analytical methods in determination of the level of oxidation of edible oil during frying and storage through monitoring changes in several proton signals of oil, including olefinic, bisallylic and allylic protons. This modern analytical method is shown within this text to be used to identify oxidation products, including primary oxidation products such as hydroperoxides and conjugated dienes and secondary products such as aldehydes, ketones, epoxides and their derivatives. By identifying intermediates and final oxidation products, many oxidation mechanisms could be elucidated. A relatively newer method, the text demonstrates that 13C NMR and 31P NMR spectroscopy can also provide additional information on the molecular structure of an oxidation product. Backgrounds, principles, and advantages over conventional methods, most recent advances, and future prospects of these methods are discussed. Advances in NMR Spectroscopy for Lipid Oxidation Assessment begins by covering the various mechanisms of lipid oxidation, including various methods to determine oxidation products. NMR spectroscopy is then covered, including its applications in foods. The next section focuses on 1H NMR Spectroscopy, including its use for assessment of lipid oxidation during oil storage and frying. The following section focuses on 13C NMR spectroscopy, including its use in determining and identifying oxidation products and mechanisms. A final section focuses on sup31“/p>


Reactive Oxygen Species Lipid Peroxidation And Protein Oxidation

Reactive Oxygen Species  Lipid Peroxidation and Protein Oxidation PDF
Author: Kartlos Joseph
Publisher: Nova Science Pub Incorporated
Category : Science
Languages : en
Pages : 285
View: 2740

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Book Description:
Many studies have shown that free radical damage and lipid peroxidation increase as a function of the degree of unsaturation of the fatty acids present in the phospholipids of biological membranes. Membrane phospholipids are particularly susceptible to oxidation not only because of their highly polyunsaturated fatty acid content but also because of their association in the cell membrane with non-enzymatic and enzymatic systems capable of generating pro-oxidative-free radical species. There are two broad outcomes to lipid peroxidation: structural damage to membranes and generation of secondary products. Membrane damage derives from the generation of fragmented fatty acyl chains, lipidlipid cross-links, lipidprotein cross-links and endocyclisation to produce isoprostanes and neuroprostanes. These processes combine to produce changes in the biophysical properties of membranes that can have profound effects on the activity of membrane-bound proteins. The consequence of peroxidation of unsaturated fatty acids is severe: damage of membranes function, enzymatic inactivation, toxic effects on the cellular division, etc. This new book presents and discusses current research on oxidative stress, and lipid oxidation non-inhibited and inhibited; assessment of oxidative balance in the lipo- and hydro-philic cellular environment in biological systems; mass spectrometry detection of protein modification by cross-reaction with lipid peroxidation products; diagonal gel electrophoretic analysis of protein disulfides: principles and applications. Other chapters describe: heavy metals exposure and cells oxidative damage; biodegradation of metallic biomaterials: its relation with the generation of reactive oxygen species; Oxidative modifications of proteins in the aging heart; role of reactive oxygen species as signalling molecules involved in the regulation of physiological processes of the nervous system; oxidative stress in diabetes and hypertension treated with alternative therapy of medicinal plants; impairment of redox homeostasis of tissue damage in inborn errors of metabolism with intoxication: insights from human and animal studies and finally lipid peroxidation of phospholipids in the vertebrate retina or in liposomes made of retinal lipids: similarities and differences are described.