title: Plant extracts combined with vitamin E in PUFA-rich diets of cull cows protect processed beef against lipid oxidation.
abstract: The effect of supplementing PUFA-rich cull cow diets with vitamin E (2.8 g/animal/day) or vitamin E plus plant extracts rich in polyphenols (PERP) (126 g/animal/day), for 101+/-3 days preceding slaughter, on the oxidative stability of longissimus thoracis (LT) and semitendinosus (ST) steaks was evaluated after ageing (for 12 d at 4 degrees C either in carcass or under-vacuum) and packaging (14 d under-vacuum (V), 4 d aerobic (A) and 7 d under modified atmosphere (70:30, O(2)/CO(2)) (MA)). The ageing method had no effect on a beef lipid oxidation intensity marker (malondialdehyde (MDA)), whereas packaging systems containing O(2) (A and MA) significantly increased lipid oxidation intensity (5 and 13 times higher than under V, respectively). Adding antioxidants to diets of animals given a PUFA-rich diet significantly improved lipid stability in steaks; the combination of vitamin E and PERP was more efficient than vitamin E alone for the most deleterious beef packaging.
authors.affiliation: INRA, UR 1213 Herbivores, Site de Theix, F-63122 Saint-Genès-Champanelle, France.
authors.forename: Mylène
authors.initials: M
authors.lastname: Gobert
authors.forename: Dominique
authors.initials: D
authors.lastname: Gruffat
authors.forename: Mihaela
authors.initials: M
authors.lastname: Habeanu
authors.forename: Emilie
authors.initials: E
authors.lastname: Parafita
authors.forename: Dominique
authors.initials: D
authors.lastname: Bauchart
authors.forename: Denys
authors.initials: D
authors.lastname: Durand
mesh_terms: D000821:Animal Feed; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D002417:Cattle; D004041:Dietary Fats / Q000378:metabolism*; D019587:Dietary Supplements; D005231:Fatty Acids, Unsaturated / Q000378:metabolism*; D005260:Female; D005419:Flavonoids / Q000494:pharmacology*; D005511:Food Handling / Q000379:methods; D015227:Lipid Peroxidation / Q000187:drug effects*; D008315:Malondialdehyde / Q000378:metabolism; D008460:Meat / Q000032:analysis / Q000592:standards; D018482:Muscle, Skeletal / Q000378:metabolism; D010100:Oxygen; D010636:Phenols / Q000494:pharmacology*; D010936:Plant Extracts / Q000494:pharmacology*; D059808:Polyphenols; D014810:Vitamin E / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D004041:Dietary Fats; D005231:Fatty Acids, Unsaturated; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts; D059808:Polyphenols; D014810:Vitamin E; D008315:Malondialdehyde; D010100:Oxygen