title: Myricetin, rosmarinic and carnosic acids as superior natural antioxidant alternatives to α-tocopherol for the preservation of omega-3 oils.
abstract: 22 natural polyphenols are compared to 7 synthetic antioxidants including BHT, BHA, TBHQ and PG with regard to their ability to protect omega-3 oils from autoxidation. The antioxidant efficiency of phenols is assessed using the DPPH test and the measurement of oxygen consumption during the autoxidation of oils rich in omega-3 fatty acids. Also, the bond dissociation enthalpies (BDE) of the Ar-OH bonds are calculated and excellent correlations between thermodynamic, kinetic and oxidation data are obtained. It is shown that kinetic rates of hydrogen transfer, number of radicals scavenged per antioxidant molecule, BDE and formation of antioxidant dimers from the primary radicals play an important role regarding the antioxidant activity of phenols. Based on this, it is finally shown that myricetin, rosmarinic and carnosic acids are more efficient than α-tocopherol and synthetic antioxidants for the preservation of omega-3 oils.
authors.affiliation: Univ. Lille, CNRS, ENSCL, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France.
authors.forename: Romain
authors.initials: R
authors.lastname: Guitard
authors.affiliation: Univ. Lille, CNRS, ENSCL, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Paul
authors.affiliation: Univ. Lille, CNRS, ENSCL, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France. Electronic address: veronique.rataj@univ-lille1.fr.
authors.forename: Véronique
authors.initials: V
authors.lastname: Nardello-Rataj
authors.affiliation: Univ. Lille, CNRS, ENSCL, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France. Electronic address: jean.marie-aubry@univ-lille.fr.
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Aubry
mesh_terms: D045784:Abietanes / Q000737:chemistry*; D000975:Antioxidants / Q000737:chemistry; D002934:Cinnamates / Q000737:chemistry*; D053630:Depsides / Q000737:chemistry*; D015525:Fatty Acids, Omega-3; D005419:Flavonoids / Q000737:chemistry*; D005519:Food Preservation / Q000379:methods*; D010084:Oxidation-Reduction; D010636:Phenols / Q000737:chemistry; D010938:Plant Oils; D024502:alpha-Tocopherol / Q000737:chemistry*; D000097123:Rosmarinic Acid
chemical_list: D045784:Abietanes; D000975:Antioxidants; D002934:Cinnamates; D053630:Depsides; D015525:Fatty Acids, Omega-3; D005419:Flavonoids; D010636:Phenols; D010938:Plant Oils; D024502:alpha-Tocopherol; D000097123:Rosmarinic Acid; C040015:myricetin; C018381:salvin
keywords: Autoxidation; BDE; DPPH; Linseed oil; Natural phenolic antioxidants; Omega-3 FAMEs