Mechanisms of antioxidant interactions in oil-in water emulsions: The influence of their physical locations and environmental pH

Panya Atikorn, Kittipongpittaya Ketinun, Laguerre Mickaël, Bayrasy Christelle, Lecomte Jérôme, Villeneuve Pierre, McClements D. Julian, Decker Eric Andrew. 2013. Mechanisms of antioxidant interactions in oil-in water emulsions: The influence of their physical locations and environmental pH. Inform, 24 (8) : 538-541.

Résumé : A classic example of synergistic antioxidant interactions can be observed between [alpha]-tocopherol (vitamin E) and ascorbic acid (vitamin C) in cell membranes. This synergism is due to "antioxidant regeneration" via the recycling of a stronger (primary) antioxidant with a weaker (secondary) antioxidant. By this principle, the primary antioxidant ([alpha]-tocopherol) scavenges free radicals in the lipid phase and is then regenerated by the secondary antioxidant (ascorbic acid). From a thermodynamic point of view, the reaction is favorable because the reduction potential of ascorbic add is much lower than a-tocopherol, indicating that ascorbic acid prefers to give an electron to oxidized [alpha]-tocopherol. From a physical property viewpoint, this reaction is also favorable because a-tocopherol is in the membrane where it can inactivate lipid radicals and yet is also at the membrane interface where it can react with ascorbic acid.

Classification Agris : Q02 - Traitement et conservation des produits alimentaires
000 - Autres thèmes

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Panya Atikorn, University of Massachusetts (USA)
• Kittipongpittaya Ketinun, University of Massachusetts (USA)
• Laguerre Mickaël, Montpellier SupAgro (FRA)
• Bayrasy Christelle, CIRAD-PERSYST-UMR IATE (FRA)
• Lecomte Jérôme, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0000-0001-9942-5858
• Villeneuve Pierre, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0000-0003-1685-1494
• McClements D. Julian, University of Massachusetts (USA)
• Decker Eric Andrew, University of Massachusetts (USA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570713/)

Métriques

[ Page générée et mise en cache le 2024-10-18 ]