查询词典 catalysis

Utilizing the intense catalysis of metal ions to peroxide oxygenating rhodanine, a catalytic fluorescence method of using the new type rhodanine to determine trace iron, cobalt, copper, tin and antimony was established.

利用痕量金属离子对过氧化氢氧化若丹宁具有强烈催化作用的性质，建立了一系列利用新型若丹宁物质催化荧光法测定痕量铁、钴、铜、锡和锑的新方法；较系统研究了系列若丹宁衍生物在催化荧光法测定金属离子的各影响因素，确定了反应的最佳条件，计算了动力学参数。

According to this, a series of new methods to determine trace cobalt, copper, antimony, cadmium, aluminum and iron was established by taking advantage of the characteristic of metal ions with intense catalysis effect on hydrogen peroxide oxygenating rhodanine.

基于此，利用痕量金属离子对过氧化氢氧化若丹宁具有强烈催化作用的性质，建立了一系列利用新型含羧酸基偶氮若丹宁衍生物催化荧光法测定痕量钴、铜、锑、镉、铝和铁的新方法。

Germanotungtic acid catalyst can be used repeatedly. germanotungtic acid ; catalysis ; synthesis ; isoamyl salicyl

杂多酸及其盐是由杂多阴离子与反荷阳离子按确定比例组成的多核配合物，具有金属氧化物和

The results show that the SAPO–5 has a pillar-like morphology with the size of about 20 μm×5 μm×5 μm.The ratio of P:Al:Si is 1:1.19:0.67 in its crystal structure, the content of Si is high. The total acidimety fo the SAPO–5 is 578.0 μmol/g , hihger than that of prepared by one step crystalline hydrothermal method.And its initial catalysis character performance on normal butane isomerization reaction reach 24.8 %, higher than that of prepared by one step crystalline hydrothermal method.

实验结果表明：产物为柱状的磷酸硅铝分子筛，其晶粒尺寸大约为20 μm×5 μm×5 μm，其晶体结构中P：Al：Si＝1：1.19：0.67，硅含量较高；采用分段晶化方式制备的SAPO-5分子筛的总酸量为578.0 μmol/g高于一段晶化方式制备的SAPO-5分子筛的总酸量；采用分段晶化生成的SAPO-5分子筛的催化正丁烷异构化反应初始活性可达到24.8 %，远高于一段晶化制备的SAPO-5分子筛的初始活性14.1 %。

Dioctyl sebacate was prepared by esterification of 2 ethylhexyl alcohol and sebacic acid in catalysis of aluminate.

以癸二酸与2－乙基己醇为原料，铝酸盐为催化剂，合成了癸二酸二辛酯。

Silicotungstic acid ; acetylsalicylic acid ; catalysis ; synthesis

乙酰水杨酸； SiW12/C ；催化；合成

Methods Thirty-five students daytime urine samples were collected,and determined by both national standard method (WS/T107-1999) and on-line digestion-flow injection catalysis spectrophotography method of UI automatic analysis device respectively.

采集35名学生的日间尿样，分别按照国家标准方法（WS/T107-1999）与尿碘自动分析装置的操作说明进行测定，并对自动分析装置的性能进行检验。

A few spiro ligands have been successfully synthesized and applied in asymmetric catalysis .

手性螺环配体的合成及其在不对称催化反应中的应用是不对称合成和催化研究中重要的研究领域之一，一些手性螺环配体被合成出来并成功地应用于不对称催化反应中。

These measurements provide a reliable basis for liquid carbon dioxide as catalyst in cold clouds, which is a catalysis technique suitable for artificial rain enhancement in warmer stratiform clouds in our country.

这些测定结果为使用LC作为冷云催化剂提供了可靠依据，为国内在较暖云顶层状云中开展人工增雨作业提供了合适的催化技术。

Methods The target compounds were prepared by using Pechmann reaction under catalysis by sulphamic acid and microwave irradiation. All the structures were confirmed by IR, 1H-NMR spectra.

在微波辐射和氨基磺酸的催化作用下经Pechmann反应得到相应产物，其结构经IR、1H-NMR波谱确证。

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。