芝麻叶营养成分分析

Analysis of nutritional components in sesame leaves

利用多种分析方法测定芝麻叶中的营养成分。用氨基酸评分(AAS)、化学评分(CS)和必需氨基酸指数(EAAI)评价氨基酸质量。结果显示,芝麻叶(DW)中水分、灰分、粗脂肪、总蛋白、总糖、还原糖、总黄酮、总多酚、Vc分别为3.06%、9.24%、7.54%、31.32%、252.61、18.62mg/g、122.80、44.75 mg/g、113.30 mg/g;5种脂肪酸中,亚麻酸的含量最高,其占总脂肪酸的45.20%;11种矿质元素中,钾的含量最高(24754.40μg/g),钙次之(24142.30μg/g),硒含量最低(0.20μg/g);芝麻叶含17种氨基酸,总量为21.44%,其中7种必需氨基酸占氨基酸总量的41.46%,9种药效氨基酸占氨基酸总量的63.81%。AAS和CS均显示其第一限制性氨基酸为含硫氨基酸(蛋氨酸和胱氨酸),第二限制性氨基酸为赖氨酸,EAA I为81.26。芝麻叶是一种营养价值较高的新资源食品,具有很好的开发利用价值。

The nutritional components in sesame leaves were determined by various methods. The quality of amino acids was evaluated by amino acids score（AAS）, chemical score（CS） and essential amino acid index（EAAI）. The results showed that the contents of water, ash, crude fat, crude protein, total sugar, reducing sugar, flavonoid, polyphenol, and Vc etc. were 3.06%, 9.24%, 7.54%, 31.32%, 252.61 mg/g, 18.62 mg/g, 122.80 mg/g, 44.75 mg/g, 113.30 mg/g, respectively. The content of linolenic acid was the highest in sesame leaves, which is 45.20% of total contents of fatty acid. The content of K is the highest （24754.40 μg/ g）, the content of Ca is the second（24142.30μg/g）, and that of Se is the lowest（0.20 μg/g） among 11 kinds of mineral element. 17 kinds of amino acidwere contained in sesame leaves. Total contents of amino acid were 21.44%, the content of 7 kinds of essential amino acid is 41.46% of total contents of amino acid. The content of 9 kinds of pharmacodynamic amino acid is 63.81% of total contents of amino acid. According to AAS and CS, the first limiting amino acid was the amino acid containing sulfur （Met＋Cys）, and the second limiting amino acid was Lys. EAAI was 81.26. The sesame leaves is a new resource food with richer nutrition and has vast prospects for developing and utilizing.