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Changes in meat quality of ovine longissimus dorsi muscle in response to repeated freeze and thaw

机译:反复冻融后绵羊背最长肌肉品质的变化

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摘要

Changes in eating and technological quality attributes of ovine longissimus dorsi muscle during repeated freeze and thaw were investigated. Shear force value, L* value, a* value and fiber diameter decreased (P<0.05) but lipid oxidation increased (P<0.05) with repeated freeze-thaw cycles. Sarcomere length and pH decreased (P<0.05) within the first 10 freeze-thaw cycles but increased (P<0.05) after 5 further cycles. Total and myofibrillar protein solubility, and intramuscular free fatty acids concentration decreased (P<0.05) after 1 cycle of freeze and thaw but then increased (P<0.05) gradually with further cycles. Hardness, chewiness, cohesiveness and resilience of comminuted lamb products decreased (P<0.05) with increased freeze-thaw cycles. And therefore, repeated freeze and thaw should be minimized in terms of meat color for commercial value and water holding capacity for further processing.
机译:研究了反复冷冻和解冻过程中绵羊背最长肌的饮食和技术质量属性的变化。反复冻融循环后,剪切力值,L *值,a *值和纤维直径降低(P <0.05),但脂质氧化增加(P <0.05)。在最初的10个冻融循环中,肌节长度和pH降低(P <0.05),但在另外5个循环后增加(P <0.05)。冷冻和融化1个循环后,总和肌原纤维蛋白溶解度和肌内游离脂肪酸浓度降低(P <0.05),但随后进一步循环逐渐升高(P <0.05)。随着冻融循环次数的增加,粉碎的羔羊产品的硬度,耐嚼性,内聚性和弹性降低(P <0.05)。因此,就肉色的商业价值和保鲜能力而言,应尽量减少反复冻融。

著录项

  • 来源
    《Meat Science》 |2012年第4期|p.619-626|共8页
  • 作者单位

    Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Animal Products Processing, MOA, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China;

    Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Animal Products Processing, MOA, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China;

    Department of Food Science & Engineering, Nanjing University of Finance & Economics, Nanjing 210046, PR China;

    Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Animal Products Processing, MOA, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China;

    Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Animal Products Processing, MOA, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China;

    Key Laboratory of Meat Processing and Quality Control, MOE,Key Laboratory of Animal Products Processing, MOA, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    freeze-thaw cycles; palatabillty; textural properties; lamb;

    机译:冻融循环;ala纹理特性;羊肉;

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