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投稿时间:2016-12-15
投稿时间:2016-12-15
中文摘要: 以广西金秀地区野生茶为材料,分析其原料特性及在红茶加工过程中主要化学成分的转化。结果表明:鲜叶原 料内含物质丰富,加工过程中水浸出物、茶多酚含量逐渐减少,总糖、总蛋白呈减-增-减变化;咖啡碱总体变化不大,硒 含量先增后减;4 种儿茶素单体和儿茶素总量均减少,氨基酸类物质先增加后减少,丝氨酸、脯氨酸等 5 种氨基酸在干 燥后含量有所增加。不同加工阶段在制品的水浸出物、茶多酚、可溶性总糖、总蛋白、硒含量间有极显著差异(P<0.01);咖 啡碱无显著性差异,儿茶素总量、ECG(表儿茶素没食子酸酯)、EGCG(表没食子儿茶素没食子酸酯)、C(儿茶素)、GA(没 食子酸)存在极显著差异(P<0.01);氨基酸含量中除赖氨酸外,其他氨基酸均有显著(P<0.05)或极显著差异(P<0.01)。本 研究以期为揭示广西野生茶品质及其资源利用提供参考。
Abstract:The wild tea in Jinxiu region of Guangxi was used as the material to analyze the characteristics of raw materials and the transformation for main chemical composition of black tea processing.The results showed that fresh leaves contained rich material,the water extract,tea polyphenol content gradually decreased during pro- cessing,total sugar and protein was decreased-increased-decreased changes.Caffeine changed little, selenium content increased first and then decreased.Total catechins and 4 kinds of catechins monomer were reduced, amino acids increased first and then decreased, the content of serine,proline and other five kinds of amino acids increased after dry.There were extremely significant differences (P<0.01) in water extracts, tea polyphenols, soluble total sugar, total protein and selenium content in different processing stages,caffeine no significant dif- ference,the total catechins,ECG(epicatechin gallate), EGCG(epigallocatechin gallate), C(catechin) and GA (gallic acid) were extremely significant different(P<0.01).Besides lysine,other amino acid were significant(P<0.05) or extremely significant difference(P<0.01).This study hoped to provide references for revealing the qual- ity and resource utilization of Guangxi wild tea.
keywords: Guangxi wild tea process chemical composition
文章编号:201706007 中图分类号: 文献标志码:A
基金项目:广西热作所基础科研业务专项(桂热研 201502)
作者 | 单位 |
温立香1,2,任二芳1,2,黎新荣1,2,张芬1,2,谢朝敏1,2,秦玉燕1,艾静汶1,2 | 1. 广西壮族自治区亚热带作物研究所,广西 南宁 530001;2. 广西亚热带农产品加工研究所, 广西 南宁 530001 |
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