湖白鲑肌肉营养成分分析

测定了湖白鲑(Coregonus cluncaformis)的肌肉营养成分。结果显示:湖白鲑含肉率为60.82%,肌肉(鲜样)中粗蛋白质含量为16.85%,粗脂肪含量4.39%,水分含量77.06%,灰分含量1.13%,该鱼肌肉中含有17种氨基酸,总量为62.00%(质量分数,干样),其中7种为人体必需氨基酸(不包括色氨酸),总量为28.16%,占氨基酸总量的45.42%;其必需氨基酸的构成比例基本符合FAO/WHO的标准。湖白鲑的限制性氨基酸为(蛋氨酸+胱氨酸)、苏氨酸和(苯丙氨酸+酪氨酸),必需氨基酸指数为59.80,4种鲜味氨基酸总量为19.94%。

Analysis on nutritive composition of muscle in Coregonus cluncaformis

Nutritive composition of muscle in Coregonus cluncaformis was analyzed.The result showed that the contents of muscle,crude protein,crude fat,moisture and crude ash in the fresh muscles were 60.82%,16.85%,4.39%,77.06% and 1.13% respectively.The muscles contained 17 amino acids and the total amount was 62.00%(mass fraction,dry weight),of which 7 essential amino acids for human(excepting for tryptophan) accounted for 28.16%,holding 45.42% of total content of amino acid.It was apparent that the constituent ratio of the essential amino acids in general was accorded with the FAO/WHO standard.The restriction amino acids was(Met+Cys),Thr and(Phe+Tyr),and the essential amino acid index(EAAI) was 59.80.The content of 4 kinds of delicious amino acids was 19.94%.