查询词典 silica

The preparation process of equisetum pratense total alkaloid includes the following steps: coarse pulverizing equisetum pratense to obtain rough powder, methyl alcohol percolation to obtain percolate, recovering methyl alcohol, concentrating, degreasing by means of petroleum ether, alkalifying concentrate, CHCl3 extracting, soda lye washing, neutral water washing, recovering CHCl3 to obtain rough alkaloid, adsorption by using silica gel column, eluting, recovering solvent so as to obtain refined EPR.

该发明是通过两个步骤来实现的：第一步，提取草问荆总碱，流程：草问荆粗粉――渗漉液――浓缩液(析胶、石油醚脱脂、氨水碱化)――碱化浓缩液(CHCl3萃取)――CHCl3层――CHCl3液(回收CHCl3)――粗生物碱――吸附硅胶柱――精致EPR。第二步，选择实验试剂、仪器、用小鼠作为实验对象，进行中枢神经系统实验，研究作用及作用机制。

Methods Silica gel column chromatography and PTLC were used to separate and purify the compounds from the petroleum ether soluble fraction of ethanol extract.

方法用硅胶柱色谱和制备薄层等方法从乙醇提取物的石油醚萃取部位分离化合物，通过波谱方法鉴定其结构。

From the transform infrared spectroscopy and X-ray photoelectron spectroscopy spectra, the hydroxyl and ethoxyl groups of the silica sol drawn from partially hydrolysis and polycondensation between TEOS and MTES can react with PA6 precursor.

红外图谱和X射线光电子能谱分析结果显示，硅溶胶的羟基和未完全水解的烷氧基能够与PA6的前驱体发生杂化反应。X射线衍射结果显示，采用本实验方法制备出的PA6和疏水型PA6/SiO2有机无机杂化材均为α晶型，而DSC结果表明，PA6/SiO2有机无机杂化材料的熔点略高于PA6。

The chlorination products were extracted by ethyl ether and isolated further through times of silica column chromatography.

研究建立了饮用水中TCMCD富集分离、定性定量的分析方法，并对一些水厂的水样进行了检测，最高浓度可达80.1ng/L。

For practical use, two of them, 13 and 18 are being supported with silica for ethylene polymerization.

并对其中两个化合物13和18以硅胶为载体进行了负载化研究。

A fiber taper can evanescently couple to whispering gallery modes in a planar silica microdisk for observing the optical properties of the microdisk cavity.

使用光纤锥可以通过其产生的倏逝场，来耦合微盘腔中的回音壁模式，从而获得对微盘腔光学性质的考察。

The product series of coated sand efficiently solved the problems: insufficiency of organic binder in high temperature, high expansivity of natural silica sand and much gas of coating of organic molecular in high temperature.

覆膜砂系列产品有效解决铸造材料有机粘结剂高温性能不足，天然硅砂热膨胀率高和有机高分子高温汽化发气量大的关键技术难题。

Liu Baoliang explanatorily uses silica gel as the sculpture material; Zang Kunkun explores the space extension; Na Wei utilizes the special blended oil so as to give prominence to the character, and they are the examples of the exploration in painting.

刘宝亮开拓性的运用硅胶作为雕塑素材和臧坤坤对于空间延展性的探索以及那危为了表现作品人物质感而运用自己调和的特殊油进行创作都体现了八零后艺术家对于绘画形式语言的探索。

Microstructural changes on coke face and gas face of used silica brick for coke oven chamber were studied by means of OM,SEM,EDAX and XRD.

借助于OM、SEM、EDAX和XRD分析手段对用后焦炉炭化室硅砖炭化面和燃烧面的显微结构变化做了研究。

XRD and TEM confirmed that the novel mesoporous silica has a diamonded face centered cubic structure with Fd3m symmetry, which was first reported up to date.

同时对它的物理性能包括比表面积、孔容和孔径通过N〓吸附-脱附技术进行了测定，考察了合成条件对其结构形成的影响。

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。