【摘要】 旨在了解有色糙米随着发芽时间的延长,人体利用率高的游离氨基酸含量及组分配比变化特点。选取红米(BP480)、黑米(BP602)和白米(BP015,CK)的糙米材料,进行发芽处理,在发芽后9个不同时间点(24、30、36、42、48、60、72、84、96 h)对γ-氨基丁酸及其他17种氨基酸进行检测,分析γ-氨基丁酸、必需氨基酸、限制氨基酸、风味氨基酸的动态变化。结果表明有色米(红米、黑米)和白米大部分游离氨基酸(包括γ-氨基丁酸)含量呈持续增长趋势,发芽96 h达到最大值,并且必需氨基酸所占总游离氨基酸含量的百分比不断升高,红米从20.3%升到48.0%,黑米从19.2%升到48.1%,白米从16.6%升到49.2%。苏氨酸成为含量最高的游离氨基酸。发芽可以改善糙米游离氨基酸的组成特性,显著提高糙米蛋白成分的利用率。更多还原

【Abstract】 To investigate the content and component ratio of free amino acids which have high utilizationefficiency in human body in germinating colored brown rice(Oryza Sativa L.), red rice(BP480), black rice(BP602), and white rice(BP015, CK) were chosen as materials. Contents of gamma aminobutyric acid(GABA)and 17 kinds of free amino acids were measured after germinating for 24, 30, 36, 42, 48, 60, 72, 84 and 96 hours. And the dynamic changes of contents of GABA, limiting amino acids, essential amino acids and flavouramino acids were analyzed. The results showed that the contents of most free amino acids(including GABA)showed a sustainable growth trend, and had the maximum values at 96 h. The proportions of essential aminoacids in total free amino acid increased from 20.3% to 48.0% in red rice, 19.2% to 48.1% in black rice and16.6% to 49.2% in white rice, respectively. Moreover, threonine became the richest free amino acid.Germination did improve the composition property of free amino acids and the protein utilization of brown rice.更多还原