Étude de la fonctionnalité alimentaire de plats industriels

Abstract : Consumers, researchers and industrialists try more and more to associate with the nutritional value of food, a beneficial effect for the health. Food characterized by high antioxidant powers seems to correspond to this demand. From an industrial point of view, it is necessary to develop methods of predicting this antioxidant capacity. The objectives of this work were to adapt a method reproducible and easy to realize of quantification of the antioxidant power on complex food and to compare this index of a set of products containing a wide range of raw materials. Until now, it has been considered that the use of raw materials characterized by a high antioxidant capacity also leads to a preparation with a high antioxidant activity. We evaluated many of the factors affecting the antioxidant activity of convenience foods (phenol content, effects of formulation, culinary reheating, and preservation) and to provide data on convenience foods consumed by the French population. The total antioxidant capacity of the ethanolic extracts was evaluated by the method of the equivalent Trolox (TEAC) using the radical cation ABTS.+. The concentration of the total phenolic compounds of the same extracts was determined by the Folin-Ciocalteu method. The results show that the food matrix is an important factor for the modulation of activities of antioxidants. A standardised testing protocol for evaluating antioxidative effects is necessary. Then, we discussed the interest of an index, as the industrialists are going to be brought to claim to the beneficial effect of the food chosen among a more and more ample sample
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Aude Hyardin. Étude de la fonctionnalité alimentaire de plats industriels. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL038N⟩. ⟨tel-01749749⟩

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