Journal
MEAT SCIENCE
Volume 111, Issue -, Pages 1-8Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2015.07.026
Keywords
Argentine beef; Aging; Retail display; Oxidative stability; Antioxidant; Pasture; Oil seeds
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Funding
- Instituto Nacional de Tecnologia Agropecuaria (INTA) [PNCAR-012211, PNPA-1126024]
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT) [PICT2009-03]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
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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. Published by Elsevier Ltd.
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