食品科学

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反复冻融对兔肉氨基酸和脂肪酸的影响

夏杨毅1,2,刘玉凌1,李洪军1,2,尚永彪1,2   

  1. 1.西南大学食品科学学院,重庆 400715;2.重庆市特色食品工程技术研究中心,重庆 400715
  • 出版日期:2015-02-25 发布日期:2015-02-16
  • 基金资助:

    公益性行业(农业)科研专项(201303082-7);西南大学博士基金项目(SWU113103)

Effect of Freeze-Thaw Cycles on Amino Acids and Fatty Acids in Rabbit Meat

XIA Yangyi1,2, LIU Yuling1, LI Hongjun1,2, SHANG Yongbiao1,2   

  1. 1. College of Food Science, Southwest University, Chongqing 400715, China;
    2. Chongqing Special Food Programme and Technology Research Center, Chongqing 400715, China
  • Online:2015-02-25 Published:2015-02-16

摘要:

以新鲜兔肉为原料,研究反复冻融对兔肉蛋白质、氨基酸和脂肪酸含量的影响。结果发现:与新鲜兔肉相比,随着反复冻融次数的增加,兔肉中蛋白质含量显著减少(p<0.05),第4次冻融后,兔里脊、后腿蛋白质含量较新鲜兔肉分别下降了5.91%、10.30%;呈味氨基酸总量没有显著变化(p>0.05),但必需氨基酸和氨基酸总量显著减少(p<0.05),第4次冻融后的兔肉里脊部位赖氨酸含量比新鲜兔肉下降了16.42%;后腿部位的赖氨酸含量比新鲜兔肉下降了14.69%;脂肪酸总量、饱和脂肪酸含量、单不饱和脂肪酸含量和多不饱和脂肪酸含量均显著减少(p<0.05)。结果表明反复冻融破坏了兔肉的营养成分,严重影响了兔肉的食用品质。

关键词: 兔肉, 反复冻融, 蛋白质, 氨基酸, 脂肪酸

Abstract:

The effect of freeze-thaw cycles on the contents of proteins, amino acids, fatty acids in rex rabbit meat was
investigated during frozen storage. It was found that the increased number of freeze-thaw cycles could result in an obvious
decrease in the content of proteins in rabbit meat (p < 0.05). Compared with fresh rabbit meat, the protein contents in frozen
loin and hind leg decreased by 5.91% and 10.30% after the forth freeze-thaw cycle. Although delicious amino acids did not
significantly decrease (p > 0.05), essential amino acids and total amino acids exhibited a significant decrease (p < 0.05). The
content of lysine in rabbit loin fell by 16.42% and fell by 14.69% in hind leg meat compared with fresh rabbit meat. The contents
of total fatty acids, saturated fatty acids, monounsaturated fatty acids and polyunsaturated fatty acids decreased obviously (p < 0.05).
In a conclusion, the number of freeze-thaw cycles had a detrimental effect on the quality of rabbit meat.

Key words: rabbit meat, freeze-thaw cycles, protein, amino acid, fatty acid

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