查询词典 solvent

A colorless solid amide of acetic acid used as a solvent and in the synthesis of organic compounds.

乙酸的固体氨化物，无色，用作溶剂及合成有机化合物。

The fact that increasing solvent polarity increases the reaction rate supports to the conclusion that the ammonolysis of α-CDA with trimethylamine follows SN2 mechanism.

增加溶剂极性对α-CDA的三甲胺氨解反应有利，表明反应具有SN2反应的特征。

The polymethyl methacrylate material with super-hydrophobic surface of the invention is prepared in the following steps: 1 the polymethyl methacrylate material is first put into diamine solution, so that the ester group on the surface of the material has ammonolysis reaction with diamine molecules; 2 and then, the product of the step 1 is put into long chain fatty acid solution to be treated and the solvent is volatilized, so as to obtain the polymethyl methacrylate material with super-hydrophobic surface.

本发明具有超疏水表面的聚甲基丙烯酸甲酯材料，是按照如下步骤进行制备的：1将聚丙烯酸甲酯材料先置于二胺溶液中使聚丙烯酸甲酯材料表面的酯基与二胺分子发生氨解反应；2然后，将其置于长链脂肪酸溶液中进行处理，挥发掉溶剂，得到具有超疏水表面的聚甲基丙烯酸甲酯材料。

TM－200S coupling agent belongs to the chelant, as resisfance excellently soluble in organic solvents on the wrap, packing or directly in the solvent-based business card printing and membership card making ink, you can also use alkanolamide or danshinones amoebocyte to make it more active groups: properteries after it's been dissolved in the water, fill in the coating, or directly in the water-based ink.

TM－200S偶联剂属于螯合型，由于耐水性好，既可溶解在有机溶剂中对颜、填料进行包覆或直接在溶剂型制卡和会员卡制作油墨使用，也可用烷醇胺或胺类试剂使它多活性基团——季铵盐化后溶解在水中包覆颜、填料，或直接在水性油墨中使用。

In this paper, the ultrastructure destruction of Ampelopsis grossedntata cell in the process of microwave-assisted solvent extraction was studied.

以显齿蛇葡萄叶为原料，采用微波破细胞进行预处理，然后，采用热水搅拌的方法提取显齿蛇葡萄中的二氢杨梅素。

The enzyme-inactivated and fat-skimmed material and 80% ethanol as the solvent were used in the extraction of amygdalin. The optimum extraction techniques were determined by the orthogonal experiment which was based on the single-factor experiment.

原料经灭酶、脱脂后，确定以80%乙醇溶液为溶剂来提取苦杏仁苷，通过单因素实验确定正交实验方案，进而得出较佳的提取工艺。

The influence of solvent on the homogeneous hydrogenation of maleic anhydride is obvious.

溶剂对顺酐加氢催化活性有着很大的影响。

Anion exchange and solvent extraction are used to separate and purify Re.

Re的分离方法仍然是离子交换和溶剂萃取法。

Methods This title compound was prepared using the O-phenylene diamine and the anisaldehyde as the raw material,methanol as the solvent,and the phosphoric acid makes the oxidant.

方法本课题以邻苯二胺和对甲氧基苯甲醛为原料，在甲醇为溶剂，磷酸为催化剂的酸性条件下，一步反应制得2-(4-甲氧基苯基)苯并咪唑。

The yield of the 3, 4-dihydropyrimidine-2(1H)-one was up to 95.4% under mole ratio of anisaldehyde, methyl acetoactate and urea is 1:2:5, ion-exchange membrane is 3 g, ethyl alcohol as solvent and refluxing for 2 h.

当对羟基苯甲醛、乙酰乙酸甲酯与脲的摩尔比为1：2：5，乙醇作溶剂，3 g离子交换膜，回流2 h，产物收率达95.4%。

I'm not an actor. I'm a professor of paleontology.

我不是演员，我是古生物学教授

Spider Network Web site that is a very image of the name.

网络蜘蛛即Web Spider，是一个非常形象的名字。