提取

Rehmannia glutinosa、 Alisma orientalis Juzep、 Cyathula officinalis Kuan via systematic solvent-extraction process and silica column chromatography.Fluorescence assay was chose as a method of screening 5α-reductase inhibitor, based on its veracity and precision compare with absorbency measure.

采用系统溶剂提取车前子、熟地黄、泽泻、川牛膝等中药材，并用硅胶柱层析初步分离提取物，建立了用于筛选5α-还原酶抑制剂与DU145细胞生长抑制剂的天然药物初步分离提取库。

Based on this, a rapid,simple and accurate method for the determination of hexavalent chromium in alkalescent soil has been developed.

结果表明，用0.4mol／LKCl为提取剂，离心分离提取液，可简单、快速、准确地测定土壤中Cr6＋，所建立的方法适用于北方偏碱性土壤。

After centrifugation, the extracts were separated on HILIC column by using acetonitrile-water as mobile phase. The analytes were identified and quantitated by LC-tandem MS under the positive/negative electrospray ionization and multiple reaction monitormode. The calibration curves showed good linearity in the range of 25-5000 μg/kg for melamine and cyanuric acid, and 50-10000 μg/kg for ammeline and ammelide. The limits of detection and limits of quantification were in the range of 5-20 μg/kg and 50-100 μg/kg, respectively.

牛奶样品直接用乙腈超声波提取；奶粉样品先用水溶解后再加乙腈超声波提取，高速离心后以乙腈－水为流动相，采用亲水作用色谱柱分离这4种化合物，在电喷雾正、负电离切换多反应监测模式下进行定性与定量分析，三聚氰酸一酰胺与三聚氰酸二酰胺含量在50~10000μg/kg之间、三聚氰胺与三聚氰酸在25~5000μg/kg之间，均获得良好的线性。

With the increase of the data volume, the researchers adopt analogism, geological abnormal theory and geological conditional combination mineralization theory to extract geological information other than data statistic analysis.

随着数据量的不断增大，以数据的统计分析和知识归纳演绎为主的信息提取技术在各个领域取得了快速的发展，研究者们除了使用数据统计分析外，还采用相似类比推理、地质异常控矿理论以及地质条件组合控矿理论等进行地学信息提取。

This paper deals with the antimicrobial function of both extracts from bamboo leaves of phyllostachys glauca moclure and Artemisia anomala S.

研究测定了淡竹竹叶、六月霜提取液对细菌的抑制作用，并对两者的抑菌效果进行了比较，结果表明：不同提取液有不同程度的抑制作用，比较而言，竹叶的总体抑菌能力强于六月霜。

METHODS: Involved in the three factors, temperature and times of extraction, concentration of NaOH solutions, to do the experiment by orthogonal design uniform design and the method of anthrone.

本文采用正交设计的方法，以硫酸蒽酮法测定总糖含量为评价指标，从提取温度、NaOH浓度、提取次数等因素入手，进行正交优化试验。

Uses the strong sulfuric acid anthrone determination kelp polysaccharide the content, mainly uses the single factor experiment definite orthogonal experiment, makes the microwave radiation time, the liquid-solid separately compared to, the ph value as well as the extraction temperature to the kelp polysaccharide extraction quantity influence, determines the best experimental condition again by the orthogonal experiment.

采用浓硫酸蒽酮测定海带多糖的含量，主要利用单因素试验确定正交实验，分别做出微波辐射时间、固液比、ph值以及提取温度对海带多糖提取量的影响，再以正交实验来测定最佳实验条件。

The research work and separation methods of arachidonic acid ethyl ester were also reviewed.

同时综述了花生四烯酸的研究概况以及目前提取分离的主要方法，在论述了各种提取分离方法优缺点的基础上，提出用超临界流体色谱法制备花生四烯酸乙酯。

The applied extension is expanded and the economic value of saponins f rom Aralia elata Seem is enhanced.

本论文以辽宁本溪县产刺嫩芽为原料，系统研究了刺嫩芽皂甙的提取纯化方法与条件、刺嫩芽皂甙基本性质、β-葡萄糖苷酶处理对皂甙影响及酶处理后刺嫩芽皂甙生理活性的提高程度，确定出了刺嫩芽皂甙的提取纯化工艺和降低毒性提高活性的方法，扩大了刺嫩芽皂甙的应用范围，提高了刺嫩芽的经济价值。

To exploit the resources of shikimic acid, the content of shikimic acid in Masson pine leaf, Oriental arborvitae leaf and Star anise, the extraction and recovery experiments were studied by HPLC.

为了开发莽草酸资源，以高效液相色谱法分析了马尾松、侧柏以及八角茴香中的莽草酸含量，并研究了马尾松中莽草酸的超声提取、加热回流两种提取方法和不同加标水平的回收试验。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐