槲

The extraction technology of quercitr in urtica was studied with ethanol as extractor.

对荨麻中槲皮苷的乙醇提取工艺进行了研究。

Quercetin and usnic acid can inhibit the 5 bacteria growth more effectively than other 26 herbs compositions.

所选28种中药成份中，松萝酸和槲皮素具有较强的抑菌作用。

Results The compositions of 28 Chinese herbs can inhibit the growth of 5 bacteria in different levels, but the effects on other 3 bacteria are not obvious. Quercetin and usnic acid have better effects on 5 bacteria than other 26 herbs compositions, with MIC 0.03125～0.125mg/ml and 0.0156～0.0625mg/ml.

结果 28种中药有效成分对3种牙周细菌抑制作用不明显，对另5种口腔常见细菌有一定的抑制作用，其中松萝酸和槲皮素有较强的抑菌作用，MIC值分别在0.0156～0.0625mg/ml和0.3125～0.125mg/ml之间。

Conclu-sion Quercetin and usnic acid can inhibit the5bacteria growth more effectively than other26herbs compositions.

所选28种中药成份中，松萝酸和槲皮素具有较强的抑菌作用。

A simple, fast, and reliable method based on capillary electrophoresis with electrochemical detection was developed for the separation and determination of rutin, ferulic acid, vanillic acid, chlorogenic acid, quercetin and caffeic acid in Radix Astragali and its medicinal preparations.

采用毛细管电泳－电化学检测法对中药黄芪的主要活性成分芦丁、阿魏酸、香草酸、绿原酸、槲皮素和咖啡酸进行了分离和测定。

The major bioactive components in a Chinese herb named Polygonum perfoliatum L. including ferulic acid, vanillic acid, quercetin, caffeic acid and protocatechuic acid were simultaneously determined by capillary electrophoresis with electrochemical detection in this paper.

采用毛细管电泳-电化学检测法同时分离测定了中药杠板归中的阿魏酸、香草酸、槲皮素、咖啡酸、原儿茶酸等主要生物活性成分的含量。

Fruit a berry, with a viscin layer inside vascular bundles.

果浆果，具槲穷寄生素层在维管束里面。

One valley lied between two peaks(flower beginning period and fruit maturating period).When meeting blood serum,the electron on the ring B-C and A-C of quercetin molecule would move and make -OHs of Ring B and A ionizated and one anion with double negative charge would present.

遇到血清时，槲皮素分子结构中的B环和C环、A环和C环形成的两套共轭体系中的电子，发生转移并使酚羟基解离，形成带双负电荷的阴离子，此阴离子将与人血白蛋白结构中结合位点上的氨基酸残基以离子键的形式结合。

Objective: To study the inhibitory effect of quercetin on transplantation tumor of breast carcinoma cell line MCF-7 in nude mice and its effect on the cell cycle.

目的：研究槲皮素对人乳腺癌细胞株MCF-7裸鼠移植瘤的抑制作用并探讨其对细胞周期的影响。

Growths growing from him to offset the growths of pine, cedar, hemlock

各种的生长物从他长出，衬托着松树、雪松、铁杉、槲树、刺

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。