共查询到18条相似文献,搜索用时 46 毫秒
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茶叶功能成分提取制备专题(一) 茶叶功能成分的开发利用与提取制备 总被引:3,自引:1,他引:2
茶叶中含有茶多酚、生物碱、糖类、氨基酸、茶色素、皂苷等功能成分.这些功能成分具有许多医药保健功能和一些特殊性质,被广泛应用于食品、医药、日化、建材、养殖等行业,国内外市场上也有许多添加茶叶提取物的产品.经过提取、分离、纯化、干燥等工艺过程,可提取制备茶叶功能成分,为开发利用提供基础原料. 相似文献
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高纯度茶氨酸分离制备工艺研究 总被引:4,自引:0,他引:4
本文研究一种从提取茶多酚后的残留液中提纯茶氨酸的制备工艺;首先通过ZTC—型天然澄清剂对茶多酚生产废液絮凝处理,随后应用一种特制的弱极性大孔树脂(JAD-1000)对处理液进行初步分离,制备含量在50%以上的茶氨酸粗品,再通过C18层析柱,按照正交实验技术筛选的分离纯化工艺参数,对茶氨酸粗品溶液进行分离纯化制备高纯度茶氨酸;结果表明用pH值3.0的水按照60ml/min的流速进行洗脱,收集11.4min-13.5min段的洗脱馏份,浓缩冻干,检测知茶氨酸的回收率为78.4%,茶氨酸含量达98.2%。 相似文献
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茶氨酸(N-乙基-γ-L-谷氨酰胺)作为茶叶的特征性物质之一,由于在茶树的氮素代谢、茶汤滋味等方面有着特殊的作用,自1950年日本学者酒户弥二朗首次从绿茶中分离、命名以来,受到了国内外学者的关注。近年来,由于茶氨酸能对咖啡碱诱发的兴奋作用起抑制、拮抗作用犤1犦,茶氨酸对大鼠的降压效果和多巴胺能神经元的活化作用犤2犦以及茶氨酸对人α-脑波释放的影响犤3犦等药理功能研究的深入,促使国内外学者对通过利用生物技术获取茶氨酸研究的深入。现就该方面的研究进展概述如下:1茶氨酸的细胞培养1990年OriharaY.等… 相似文献
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Adane Tilahun Getachew Susan Lvstad Holdt Anne Strunge Meyer Charlotte Jacobsen 《Marine drugs》2022,20(4)
This study was aimed at investigating the effect of low polarity water (LPW) on the extraction of bioactive compounds from Fucus vesiculosus and to examine the influence of temperature on the extraction yield, total phenolic content, crude alginate, fucoidan content, and antioxidant activity. The extractions were performed at the temperature range of 120–200 °C with 10 °C increments, and the extraction yield increased linearly with the increasing extraction temperature, with the highest yields at 170–200 °C and with the maximum extraction yield (25.99 ± 2.22%) at 190 °C. The total phenolic content also increased with increasing temperature. The extracts showed a high antioxidant activity, measured with DPPH (2,2-Diphenyl-1-picrylhydrazyl) radicals scavenging and metal-chelating activities of 0.14 mg/mL and 1.39 mg/mL, respectively. The highest yield of alginate and crude fucoidan were found at 140 °C and 160 °C, respectively. The alginate and crude fucoidan contents of the extract were 2.13% and 22.3%, respectively. This study showed that the extraction of bioactive compounds from seaweed could be selectively maximized by controlling the polarity of an environmentally friendly solvent. 相似文献