title: Antioxidant status, lipid and color stability of aged beef from grazing steers supplemented with corn grain and increasing levels of flaxseed.
abstract: Angus steers were grazed on unsupplemented pasture (CNTRL), pasture supplemented with 0.7% BW cracked corn (FLAX-0), FLAX-0 with 0.125% and 0.250% BW of whole flaxseed (FLAX-1 and FLAX-2). Six steers were grazed per treatment for 70 days, with start and finish weights of 458 and 508 kg. At 24 h post slaughter, longissimus thoracis were harvested, and steaks assigned to treatments of postmortem aging time under vacuum (PM; 3, 14 and 56 days) with or without five days of aerobic exposure (AE). Meat antioxidant status was higher (P<0.05) when feeding CNTRL and FLAX-1 than FLAX-0 and FLAX-2. Under AE, lipid oxidation was highest for FLAX-2 (P<0.05), and lowest for FLAX-1. Greatest TBARs and lowest antioxidant capacity and redness values were obtained with AE and the longer PM (P<0.05). Beef oxidative stability through AE improved by adding a low flaxseed level to supplemented corn grain, but deteriorated by adding a high flaxseed level or by extending PM.
authors: Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Av. Rivadavia 1917, C1033AAJ Ciudad Autónoma de Buenos Aires, Argentina; Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 115 y 47, 1900 La Plata, Buenos Aires, Argentina; Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta Nac. 226km. 73.5, 7620 Balcarce, Argentina.
authors: L B
authors: LB
authors: Pouzo
authors: INTA-LABINTEX, UMR-Qualisud Assistante UMR QUALISUD TA B 95/16, 73, rue Jean-François Breton, 34398 Montpellier Cedex, France.
authors: A M
authors: AM
authors: Descalzo
authors: Centro de Investigación y Desarrollo en Criotecnología de Alimentos CIDCA-Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 47 y 116, 1900 La Plata, Buenos Aires, Argentina; Centro de Investigación y Desarrollo en Criotecnología de Alimentos CIDCA-Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 47 y 116, 1900 La Plata, Buenos Aires, Argentina.
authors: N E
authors: NE
authors: Zaritzky
authors: Instituto Tecnología de Alimentos, Centro de Investigación Agroindustria, Instituto Nacional de Tecnología Agropecuaria INTA Castelar, Nicolás Repetto y de los Reseros, cc77, B1708WAB Morón, Buenos Aires, Argentina.
authors: L
authors: L
authors: Rossetti
authors: Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria, Ruta Nac. 226, km 73.5, 7620 Balcarce, Argentina. Electronic address: pavan.enrique@inta.gob.ar.
authors: E
authors: E
authors: Pavan
mesh_terms: D000818:Animals; D017849:Animals, Inbred Strains; D000975:Antioxidants / Q000032:analysis / Q000378:metabolism*; D001118:Argentina; D002417:Cattle; D004032:Diet / Q000009:adverse effects / Q000662:veterinary*; D004041:Dietary Fats / Q000032:analysis; D019597:Flax / Q000009:adverse effects / Q000737:chemistry*; D018857:Food Packaging; D063427:Food Quality; D061353:Food Storage; D060434:Herbivory; D006801:Humans; D015227:Lipid Peroxidation; D008297:Male; D008460:Meat / Q000032:analysis; D018482:Muscle, Skeletal / Q000254:growth & development / Q000378:metabolism*; D010084:Oxidation-Reduction; D010860:Pigments, Biological / Q000032:analysis / Q000096:biosynthesis; D012639:Seeds / Q000009:adverse effects / Q000737:chemistry*; D015430:Weight Gain; D003313:Zea mays / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D004041:Dietary Fats; D010860:Pigments, Biological
keywords: Aging; Antioxidant; Argentine beef; Oil seeds; Oxidative stability; Pasture; Retail display