黑尾近红鲌含肉率及肌肉营养成分分析
THE RATIO OF FLESH TO BODY AND ANALYSIS ON NUTRITIVE COMPOSITION OF MUSCLE IN ANCHERYTHROCULTER NIGROCAUDA
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摘要: 测定了长江上游特有鱼类黑尾近红鲌的含肉率及其肌肉生化成分和能值.结果表明:黑尾近红鲌的含肉率为0.4%;其肌肉生化成分(鲜重百分比)水分含量为80.9%、蛋白质15.92%、脂肪1.11%、灰分1.01%、无氮浸出物0.99%、比能值4.3kJ/g及E/P 2.45kJ/g.肌肉生化成分含量与体长变化无明显关系.肌肉中含有1种氨基酸,总量为69.0%(干重百分比);9种人体必需氨基酸总量是34.81%,必需氨基酸占氨基酸总量比例为50.39%;四种鲜味氨基酸含量为26.94%;必需氨基酸指数(EAAI)是63.64.缬氨酸,苏氨酸和异亮氨酸为限制性氨基酸.Abstract: Measurements were made on the ratio of flesh in whole body and analysis of the nutritive composition,energy and amino acids of muscle in A nigrocauda which is endemic fish living in the up reach Changiiang River Samples were collected from the Longxi branch at Sichuan Luzhou in Mainland China during 2001—2002 Longxi branch is a first step tributary of the up reach Changjiang River The ratio of flesh in whole body was measured by using 14 individuals The nutritive composition,energy were analyzed by using 21 groups from 35 individuals The composition of amino acids of muscle was examined by using 10 individuals It was showed that the ratio of flesh to body was 70.74%,the ratio of gill in whole body was only 1.40%;analysis results of the nutritive composition(%,wet)were that:the moisture of muscle was 80.97%,protein 15.92%,fat 1.11%,ash 1.01%,non nitrogen extract 0.99% The content of energy was 4.37kJ/g,E/P was 27.45kJ/g. There was no apparent relationship between changes of body length and the content of the nutritive composition,energy and amino acids in muscle There was no significant different in the content of the nutritive composition,energy and amino acids in muscle from the samples at May and October It was found those 17 common amino acids and 9 essential amino acids for human needs in muscle(no analysis was made for tryptophane) The total content of amino acids was 69.07%(dry);the content of essential amino acids was 34.81%;the percentage of essential amino acids in total amino acids(E/TA)was 50.39%;essential amino acids to no essential amino acids(E/NE)was 1.02;essential amino acids gram to total nitrogen gram(E/TN)was 2.59;except cystine,coefficient variations of content of amino acids were lower than 10%,the content of the difierent amino acids was stable By nutrition evaluation for the amino acids in muscle to human needs,the content of 4 kinds delicious amino acids was 26.94%;according to the amino acids score(AAS),the first limited amino acid was threonine and the second limited amino acid was valine;on the basis of chemical score(CS),the first limited amino acids was valine and second 1imited amino acid was ileucine;the essential amino acids index was 63.64 Comparativing the contents of amino acids in muscle of Ancherythroculter with four species Culter,it was not obvious that the results were apparent difference.
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