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By Edwin N. Frankel

The sector of antioxidants has elevated over the past six a long time right into a wide selection of multi-disciplinary components that effect meals and future health. Antioxidants in nutrition and biology: proof and fiction is a guide designed to assist all those that have to hinder or regulate oxidation, in particular in meals items, or to appreciate the houses of antioxidants in nutrition, foodstuff, well-being and medication. It conveys the complexity of antioxidant chemistry by means of delivering an appreciation of many of the phenomena that impact oxidation and its inhibition in meals and organic systems.

Beginning with the underlying chemistry, the publication strikes directly to clarify how the task of antioxidants is affected on the interface of complicated multiphase lipid structures and to debate the issues of comparing the actions of antioxidants in meals and organic structures. After reviewing the antioxidants found in numerous meals, the writer addresses the speculation that the future health of somebody is motivated by means of the potency of assorted defense structures opposed to oxidant harm. He additionally considers even if extra or more desirable typical antioxidants are wanted in our nutrition to minimize oxidative tension from nutritional and environmental components, and to therefore decrease the chance of heart problems

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Oxidation of β-D-glucose by glucose oxidase-catalase system (to reduce the resulting hydrogen peroxide). require nor generate toxic or unpleasant compounds that may affect the safety or sensory properties of foods. Glucose oxidase coupled with catalase is used commercially to remove oxygen from foods. 7). The gluconolactone is spontaneously hydrolysed to D-gluconic acid and the hydrogen peroxide can be removed by catalase. This glucose oxidase system has been applied in fruit juices, mayonnaise and salad dressings to increase shelf life and prevent off-flavor development.

Lactoferrin is an iron transport non-heme glycoprotein, present in human milk and many biological secretions, which can effectively inhibit the oxidation of various lipid systems through its iron-binding capacity. However, this protein can also have prooxidant activity depending on the lipid system and its concentration relative to the concentration of metal ions. 3). Because of its antimicrobial properties, lactoferrin may also be a useful additive in other foods supplemented with iron. Other known proteins that chelate or inactivate transition metals found in human serum include transferrin, which binds iron, and albumin, which binds copper.

Agric. , 50, 2392–2399. Meyer, AS and Isaksen, A (1995) Application of enzymes as food antioxidants. Trends Food Sci. , 6, 300–304. 42 ANTIOXIDANTS IN FOOD AND BIOLOGY Palozza, P and Krinsky, NI (1992) β-Carotene and α-tocopherol are synergistic antioxidants. Arch. Biochem. , 297, 184–187. Satué-Gracia, MT, Frankel, EN, Rangavajhyala, N and German, JB (2000) Lactoferrin in infant formulas: Effect on oxidation. J. Agric. , 48, 4984–4990. Schaich, KM (1992) Metals and lipid oxidation. Contemporary issues.

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