Effects of dietary vitamin E supplementation and packaging on the quality of minced beef

被引:33
作者
Formanek, Z
Kerry, JP [1 ]
Buckley, DJ
Morrissey, PA
Farkas, J
机构
[1] Univ Coll Cork, Dept Food Technol, Cork, Ireland
[2] Univ Hort & Food Ind, Fac Food Ind, Dept Refridgerat & Livestock Prod Technol, Budapest, Hungary
[3] Univ Coll Cork, Dept Nutr, Cork, Ireland
关键词
D O I
10.1016/S0309-1740(98)00031-X
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Friesian cattle, aged 26-27 months, were fed a diet supplemented with 2000 IU alpha-tocopheryl acetate/kg feed/day and another group was fed a basal diet (20 IU/kg feed/day) for approximately 50 days prior to slaughter. Following frozen storage (-20 degrees C for 8 weeks) semimembranosus muscles from basal and a-tocopheryl acetate supplemented cattle were minced and vacuum packaged, aerobically packaged or packaged under modified atmospheres (MAP) (30% O-2: 70% CO2; 70% O-2: 30% CO2; 80% O-2: 20% CO2). Samples were held under refrigerated (4 degrees C) display (fluorescent lighting, 616 lux) for eight days. Vacuum-packaged samples were held under similar conditions hut in complete darkness and allowed to bloom for a minimum of 4 hr prior to taking colour readings. TBARS values and Hunter a values in minced beef were measured every two days. alpha-Tocopherol concentrations were significantly (p < 0.05) higher in minced meat samples from the supplemented group than in the basal group. Significant (p < 0.05) reductions in alpha-tocopherol concentrations in supplemented meat samples were observed with increased concentrations of oxygen in different packaging systems after eight days of refrigerated storage. TBARS values were reduced over the whole retail display period for all packaging systems when alpha-tocopheryl acetate supplemented beef was used. TBARS values increased as oxygen levels increased in MAP. Hunter a values showed that vitamin E supplementation in combination with vacuum packaging and MAP improved the colour stability of meat during the first 4 days of storage, however, the failure of MAP to extend meat colour for longer periods of time was probably the result of prior storage at -20 degrees C for 8 weeks. (C) 1998 Elsevier Science Ltd. All rights reserved
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收藏
页码:203 / 210
页数:8
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