新疆不同区域大果沙枣果肉中氨基酸含量分析及营养价值评价

Analysis of amino acid content and evaluation of nutritional value in pulp of Elaeagnus angustifolia from different regions of Xinjiang

中文关键词:  大果沙枣  氨基酸含量  营养价值评价  区域差异

英文关键词:Elaeagnus angustifolia  amino acid content  nutritional value evaluation  regional differences in Xinjiang

中文摘要:

      目的 研究新疆不同地区大果沙枣果肉中氨基酸含量差异及营养价值。方法 采用全自动氨基酸分析仪, 在波长分别为570 nm和440 nm处采用茚三酮柱后衍生离子交换色谱法对来自新疆9个不同县市、18个大果沙枣果肉中氨基酸含量进行测定, 并通过与联合国粮农组织/世界卫生组织(Food and Agriculture Organization of the United Nations/World Health Organization, FAO/WHO)氨基酸模式谱和理想蛋白质(全鸡蛋模式)标准比较, 计算氨基酸比值(amino acid ratio, RAA)、氨基酸比值系数(ratio coefficient of amino acid, RC)、氨基酸比值系数分(score of ratio coefficient, SRC), 对沙枣果肉中的氨基酸进行了营养价值评价。结果 18份大果沙枣样品果肉中均含有17种氨基酸, 必需氨基酸占比13.87%~21.96%, 药用氨基酸占比73.03%~80.21%。不同区域大果沙枣氨基酸组成差异较大, 但策勒县沙枣中氨基酸总量、药用氨基酸总量及必需氨基酸含量均为最高, 其值分别为3.69、2.73和0.81 g/100g。通过与FAO/WHO氨基酸模式谱和全鸡蛋模式标准比较, 英吉沙县沙枣的SRC值最高, 分别为66.92%和72.27%。结论 作为植物基食物来源, 沙枣的氨基酸具有较高的药用价值; 新疆不同地区沙枣的氨基酸含量存在差异, 后续研究可更进一步探索沙枣优势品种的选育和加工。

英文摘要:

      Objective To investigate the differences in amino acid content and nutritional value of Elaeagnus angustifolia from different regions in Xinjiang. Methods The amino acid content in the pulp of 18 Elaeagnus angustifolia samples from 9 different counties in Xinjiang were evaluated by automatic amino acid analyzer at wavelengths of 570 nm and 440 nm by post-column derivative ion exchange chromatography, and by comparing with Food and Agriculture Organization of the United Nations/World Health Organization (FAO/WHO) amino acid pattern spectrum and ideal protein standard, the amino acid ratio (RAA), ratio coefficient of amino acid (RC) and score of ratio coefficient (SRC) were calculated. The nutritional value of amino acids in the pulp of Elaeagnus angustifolia was evaluated. Results There were 17 kinds of amino acids in the pulp of 18 Elaeagnus angustifolia samples. The essential amino acids accounted for 13.87%–21.96%, and the pharmacodynamic amino acids accounted for 73.03%–80.21%. The amino acid composition of Elaeagnus angustifolia were quite different among regions, and the content of total amino acids, essential amino acids and pharmacodynamic amino acids were all the highest in Qira Country, with values of 3.69, 2.73, and 0.81 g/100 g, respectively. According to the comparison of FAO/WHO amino acid pattern spectrum and whole egg reference standard, Elaeagnus angustifolia in Yen gisar County had the highest SRC of 66.92% and 72.27%, respectively. Conclusion As a plant-based food source, Elaeagnus angustifolia pulp is rich in amino acids and has high medicinal value. The amino acid content of them sold in different regions of Xinjiang is different, so the subsequent study can further explore the breeding and processing of the dominant varieties of Elaeagnus angustifolia.