Methods : using orthogonal design method , to apply extract yield of rhizoma coptis and the extract amount of berberine hydrochloride as observing indexes , to measure the content of dl - tetrahydropalmatine with hplc 方法：采用正交设计法，以槲皮素、原儿茶醛薄层斑点，延胡索乙素含量为指标，优选提取工艺。
Customers , cold water dissolved and hot water dissolved . these two series also include 8 specifications that adapt to the requirements of different beverage and food and are for the extraction of tea polyphenols 该茶现有适应不同饮料、食品等要求及供提制茶多酚、儿茶素用的热溶型和冷溶型八个规格的产品，可供客户选择。
Blood analysis one - hour after dark chocolate was eaten showed a significant rise in antioxidant levels , including levels of epicatechin , a well - known dietary flavonoid , report dr 罗马国家食品与营养研究学会的毛罗?塞拉菲尼和他的助手说，受试者吃了黑巧克力一小时后，血液分析显示抗氧化成分的含量显著升高，包括表儿茶酸的含量。
These include catechin and gallocatechin ( hydroxyls at positions 5 ' as well as at 3 ' and 4 ' as in catechin ) , their esters with gallic acid , catechin gallate , and gallocatechin gallate , and their epimers 它们有几茶素和儿茶素(在5 '位上以及如同儿茶素中一样在3 '和4 '位上羟基化) ，它们与酸生成的酯，即儿茶素酸酯和儿茶素酸酯，以及它们的差向(表)异构体。
He found that citrus juice increased recoverable ( absorbable ) catechin levels by more than five times , while vitamin c ( ascorbic acid ) boosted recoverable levels of the two most abundant catechins by six and 13 times 他发现，柑橘汁将可恢复（可吸收的）儿茶素水平提高了5倍还多，同时维生素c （抗坏血酸）将其中两种含量最多的儿茶素中的可恢复水平提高了6倍和13倍。
Results emodin , astragaloside , protocatechuic aldehyde , paeoniflorin , bupleurum root , and barbary wolfberry fruit could be detected with thin layer chromatography , in which distinct , reproductive and specific spot responsible for every ingredient was observed 结果在薄层色谱中均能检出大黄素、黄芪甲苷、原儿茶醛、芍药苷、柴胡、枸杞子，且色谱斑点清晰，重现性好、专属性强。
Thiolysis hplc will be better for the dihydrochalcones which includes the compounds of xyloglucose phloretin and phloretin , the catechins and their end units . unthiolysis hplc will be better for the hydroxycinnamic acids , procyanidin b2 and catechin monomers . 2 硫解hplc分析儿茶素类及其末端单元和二氢查耳酮(根皮苷和木糖根皮苷) ；非硫解hplc分析羟基肉桂酸类、原花青素b2 、花青素及儿茶素单体。
Abstract : dyeing effect with the extractive catechin was analyzed by ultrasonic and compared it with the catechin extracted by conventional method . it can be drawn that it is available to apply ultrasonic technology on wool fabric dyeing with natural color 文摘:研究了超声波萃取的儿茶素之染色效果，并与常规法萃取的儿茶素的染色效果进行了比较，结果表明，超声波技术应用于天然色素染羊毛是可行的。
3 flexible liposome constituted with pc + dona were exhibited under transmission electron microscopy . 4 pfg - nmr analysis indicated that the use of 25 : 1 of tween - 20 : ( - ) c , most of it ( > 90 % ) has been incorporated in the tween - 20 micelle structures 4 、以pnnmr分析了胶束体帅）结构对卜几类物质的荷载量，发现当t een一20使用量为儿茶素卜）的50倍时，绝大部分卜） c （ 90以上）己嵌禾在tween 20形成的胶束体（ 。
In the machining process , the destroy of the strong hot to tea active substances and taste is reduced as low as possible , so that the oxidation can be avoided in the storage and transportation , which makes the product taste much greener and fresher 加工中尽量减少了热对茶叶生理活性物质及风味成份的破坏，避免了贮存、运输中的氧化，使产品滋味鲜爽，汤色翠绿，缕缕茶香中带有淡淡的青草气，其儿茶素、氨基酸、维生素
