儿茶酚

Thetotal amount of 13 kinds of acid methanol soluble phenolic substances in female plant leaves ofAcer negundo L.was also significantly higher than that in male plant leaves.

因为原儿茶酸、丁香酸、苯甲酸、肉桂酸、杨梅黄酮等组分的含量较高，复叶槭雌株叶片中13种酸性醇溶性酚类物质的总量普遍高于雄株(p＜0.01)。

Results The content of Salvianolic acid B decreased with decocting time passing by,while the content of tanshinol and protocatechualdehyde increased.

结果随着煎煮时间的延长，丹参中的主要水溶性有效成分丹酚酸B的含量会而逐步降低；而同时，丹参素和原儿茶醛的含量则持续增加。

Methods By means of UPLC, apply factorial experiment design to investigate overall the changing rule of the contents of salvianolic acid B,tanshinol,protocatechualdehyde and etc.in salvia miltiorrhiza with different multiple of water、decocting duration,decocting times.

方法使用超高效液相色谱仪，采用析因试验设计，考察了丹参饮片在不同加水倍数、煎煮时间、煎煮次数下的煎出液中丹酚酸B、丹参素、原儿茶醛等多种成分的含量变化规律。

Conclusionph and the quality of danshensu,protocatechuic aldehyde and salvianolic acid b is stable.

结论配伍液中丹参素、原儿茶醛、丹酚酸b的质量和ph值基本稳定。

Methodsa gradient hplc system was used in the quantitative analysis of the danshensu ,protocatechuic aldehyde and salvianolic acid b in 6 hours,and its ph was determined at 25℃for 24 hours.

方法采用高效液相色谱法梯度洗脱测定配伍液中6 h内丹参素、原儿茶醛、丹酚酸b的含量。并在25℃时24 h测定配伍液的ph值。

A method based on capillary electrophoresis with electrochemical detection has been developed for the separation and determination of epicatechin, kaempferol, chlorogenic acid, 4-hydroxybenzoic acid, quercetin and protocatechuic acid in hawthorn for the first time.

首次采用毛细管电泳—电化学检测法同时测定山楂中的6种活性成分：表儿茶素，山奈酚，氯原酸，4-羟基苯甲酸，槲皮素和原儿茶酸的含量。

Resultsph value and the contents of danshensu,protocatechuic aldehyde and salvianolic acid b had no significant change in compatible solution.

结果丹红注射液与10%氯化钾配伍后24 h内ph值无显著变化，丹红注射液中有效成分丹参素、原儿茶醛和丹酚酸b的含量6 h内基本稳定。

Hibiscus protocatechuic acid, a simple phenolic compound, isolated from Hibiscus sabdariffa L.

原儿茶酸（protocatechuic acid， PCA）是一简单多酚类化合物，经由乾燥的洛神花萃取而来的。

Eight phenolic acids in Satsuma mandarin during maturity were determined by high-performance liquid chromatography coupled with photodiode array detector in this study, which were:protocatechuic, p-hydroxybenzoic, vanillic, caffeic, p-coumaric, ferulic, sinapic and chlorogenic.

采用HPLC-PDA测定了不同成熟期温州蜜桔中八种酚酸的含量，即绿原酸、咖啡酸、对香豆酸、阿魏酸、芥子酸、原儿茶酸、对羟基苯甲酸和香草酸。

The inhibitory effect against platelet aggregation induced by ADP of 4 watersoluble components was studied in vitro.

丹参4种水溶性单体对血小板功能的影响研究结果表明，丹参酚酸B、迷迭香酸、丹参素、原儿茶醛均具有体外抗ADP诱导的兔血小板聚集活性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。