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《广东海洋大学学报》2019,(2)
【目的】比较野生和养殖大麻哈鱼(Oncorhynchus keta)肌肉的营养成分,并评价其营养品质。【方法】采集黑龙江干流抚远段野生大麻哈鱼及3龄养殖大麻哈鱼肌肉,测定二者的基础营养成分、氨基酸、脂肪酸、矿物质等成分,分析其营养品质。【结果】野生大麻哈鱼肌肉(湿基)中水分含量较高,养殖大麻哈鱼肌肉中粗脂肪含量较高。野生和养殖大麻哈鱼肌肉中均含有18种氨基酸,其中8种必需氨基酸(EAA)总量质量分数分别是33.07%和19.62%(干基),占氨基酸总量的39.83和39.01%,符合FAO/WHO推荐的理想蛋白质标准。根据AAS和CS值,野生和养殖大麻哈鱼肌肉中第一限制性氨基酸分别为色氨酸和苏氨酸,必需氨基酸指数(EAAI)分别为61.31和40.82。野生和养殖大麻哈鱼肌肉中含有丰富不饱和脂肪酸,不饱和脂肪酸与饱和脂肪酸的比值分别为2.48和3.47。大麻哈鱼肌肉中含有多种人体所需的矿物质元素。【结论】野生大麻哈鱼肌肉具有高蛋白、低脂肪、脂肪质量较高的特点。养殖大麻哈鱼肌肉脂肪含量较高,氨基酸组成则低于野生大麻哈鱼。 相似文献
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Ustadi K. Y. Kim S. M. Kim 《中国海洋大学学报(英文版)》2005,4(3):198-204
The protease inhibitor was purified from five different fish eggs. The molecular weights of Pacific herring, chum salmon, pond smelt, glassfish, and Alaska pollock egg protease inhibitors were 120, 89, 84.5, 17, and 16.8kDa, respectively. The specific inhibitory activity of glassfish egg protease inhibitor was the highest followed by those of Pacific herring and Alaska pollock in order. The specific inhibitory activity and purity of glassfish egg protease inhibitor were 19.70 U mg^- 1 protein and 164.70 folds of purification, respectively. Glassfish egg protease inhibitor was reasonably stable at 50 - 65℃ and pH 8, which was more stable at high temperature and pH than protease inhibitors from the other fish species. Glassfish egg protease inhibitor was noncompetitive with inhibitor constant （Ki） of 4.44 nmol L^-1 相似文献
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马苏大麻哈鱼(Oncorhynchus masou)作为国家二级保护动物，其自然种群的形态特征及营养状况对于合理开展该物种的生物多样性保护、渔业资源养护有着重要的参考价值。本研究对吉林省图们江流域密江河的陆封型马苏大麻哈鱼种群进行形态特征、氨基酸组成、脂肪酸含量等分析，并与一个人工养殖马苏大麻哈鱼种群进行比较研究。结果表明：吉林密江河陆封型马苏大麻哈鱼体质量范围在19.93～215.05 g,体长范围在10.40～22.00 cm。肌肉中水分含量为74.04%±3.05%、灰分含量为1.84%±0.33%、粗蛋白含量为19.73%±2.42%、粗脂肪含量为3.18%±0.04%。肌肉中检测出17种氨基酸，7种必需氨基酸，占氨基酸总量的40.77%,4种鲜味氨基酸，占氨基酸总量的37.54%。以氨基酸评分(AAS)作为评价标准时，缬氨酸为第一限制性氨基酸，苯丙氨酸+酪氨酸为第二限制性氨基酸。肌肉中含有22种脂肪酸，不饱和脂肪酸含量尤为丰富(59.36%),脂肪酸中EPA、DHA含量分别为3.87%、2.81%。本研究可为今后在图们江流域开展马苏大麻哈鱼的渔业资源养护和生物多样性保护提供基... 相似文献
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