日本金线鱼肌肉营养成分分析

对日本金线鱼(Nemipterus japonicus)的含肉率和肌肉营养成分进行测定并分析。结果表明,日本金线鱼含肉率为74.96(±1.99)%,粗蛋白含量为19.48(±0.21)%,粗脂肪含量为2.66(±0.02)%,水分含量为76.37(±0.34)%,粗灰分含量为1.35(±0.02)%。肌肉蛋白中17种氨基酸占鲜样的13.71%,其中人体必需氨基酸占鲜样的6.26%,占氨基酸总量的45.66%,必需氨基酸与非必需氨基酸的比例为89%,符合FAO/WHO的标准。第一、第二限制性氨基酸均为含硫氨酸(蛋氨酸+胱氨酸)和苏氨酸,必需氨基酸指数为65.30,4种鲜味氨基酸含量为5.39%,占氨基酸总量的39.31%。

Analysis on muscle nutrition component of Nemipterus japonicus

Nutritional components in the muscle of Nemipterus japonicus were analyzed using ordinary standard methods.The results showed flesh rate was 74.96(±1.99)%,and contents of moisture,crude protein,crude fat,ash were 76.37(±0.34)%,19.48(±0.21)%,2.66(±0.02)%and 1.35(±0.02)% in fresh muscle,respectively.The total mount of 17 kinds of amino acids was 13.71%(fresh),with essential amino acids of 6.26%,accounting for 45.66% in total amino acids,and the ratio of essential amino acids and non-essential amino acids was 89%.According to nutrition evaluation in amino acids score(AAS) and chemical score(CS),the first limiting amino acid was valine and the second limiting amino acid were Met,Cys and Thr,the essential amino acid index(EAAI) was 65.30.The constitutional rate of the essential amino acids accorded with the FAO/WHO standard basically.The content of tasty amino acids was 5.39%,comprising with 39.31% in total amino acids.