中国沙棘和西藏沙棘果实氨基酸含量比较研究

Comparison on Amino Acid Content in Fruits between Hippophae rhamnoides subsp.sinensis and Hippophae thibetana

为探讨中国沙棘(Hippophae rhamnoides subsp. sinensis)和西藏沙棘(Hippophae thibetana)果实氨基酸营养品质和风味的差异,采用氨基酸自动分析仪测定了两种沙棘果实氨基酸含量。结果表明:两种沙棘果实均检测出17种氨基酸,总含量分别为中国沙棘68.83 mg/g、西藏沙棘135.66 mg/g;中国沙棘和西藏沙棘的人体必需氨基酸含量分别为49.59%、47.43%;西藏沙棘果实中的药用氨基酸、支链氨基酸和芳香族氨基酸含量均高于中国沙棘果实;中国沙棘和西藏沙棘果实风味均为酸味;利用氨基酸的比值系数法和模糊识别法,评价得出西藏沙棘果实氨基酸营养价值高于中国沙棘果实。

To compare the amino acid quality and flavor of the fruits between Hippophae rhamnoides subsp.sinensis and Hippophae thibetana,we used an automatic amino acid analyzer to determine the content of amino acids in the fruits of the two sea-buckthorn species.The results showed that 17 amino acids were detected in the fruits of both species,with the total content of 68.83 mg/g in H.r.sinensis and 135.66 mg/g in H.thibetana.The proportion of essential amino acids was 49.59%in H.r.sinensis and 47.43%in H.thibetana.The content of medicinal amino acids,branched-chain amino acids,and aromatic amino acids in the fruits of H.thibetana was higher than that in the fruits of H.r.sinensis.The fruits of both H.r.sinensis and H.thibetana were sour.The evaluation based on the ratio coefficient and the fuzzy recognition methods suggested H.thibetana fruits had higher amino acid nutritional value than H.r.sinensis fruits.