牦牛肝营养成分分析及营养评价

研究牦牛肝中的营养素成分与营养价值,对牦牛肝中的基本营养成分、胆固醇、维生素、氨基酸以及矿质元素的含量进行测定,结果表明,新鲜牦牛肝中粗蛋白、粗脂肪、灰分、水分含量分别为19.7、2.9、0.7、70.9g/100g;新鲜肝脏中富含α-VE、维生素B12,含量分别为1.50mg/100g和0.9mg/100g;氨基酸总量为64.77g/100g,必需氨基酸占氨基酸总量的41.14%,缬氨酸是第一限制氨基酸,4种鲜味氨基酸占氨基酸总量的20.20g/100g;牦牛肝中富含Ca、Mg、Fe、Zn、Cu、Mo、Mn、K、Al等矿质元素。可见,牦牛肝是一种高蛋白、低脂肪,富含维生素和各种矿物质的健康食品。

Analysis and evaluation of the nutritional composition in liver of yak

Nutritional composition and nutritional value in the liver of yak were investigated.The macro nutrients,cholesterol,amino acids,vitamin and mineral elements in the liver were determined,the results indicated that the contents of crude protein,crude fat,crude ash and moisture in fresh liver were 19.7,2.9,0.7,70.9g/100g,respectively;The contents of α-VE,vitamin B12 in fresh liver were 1.50,0.9mg/100g,respectively.The total amount of amino acids was 64.77g/100g and essential amino acids for human accounted for 41.14g/100g of total content of amino acids,Valine was the first limiting amino acids.The content of four kinds of delicious amino acids accounted for 20.20g/100g of total content of amino acids.It’s rich in trace elements,such as Ca,Mg,Fe,Zn,Cu,Mo,Mn,K and Al,etc.Therefore,yak liver might be the safe and healthy food containing higher proteins and lower fat,richer vitamin and minerals.