查询词典 carboxylic acid

Carboxylic acid was peroxidized in organic solvents catalyzed by lipase and glycidol was synthesized from allyl alcohol catalyzed by acid peroxide.

利用脂肪酶在有机介质中催化制备过氧酸，丙烯醇在过氧酸的作用下发生环氧化反应生成环氧丙醇。

There are carboxylic acid groups and carboxylate groups on the surface of mixed acid-treated carbon nanotube.

报道了一种多壁纳米碳管修饰电极的制备方法并表征了它的电化学特性。

The present invention discloses a polycarboxylic acid copolymer which is obtained by copolymerization of monomer components comprising a polyalkyleneimine unsaturated monomer (A2) and an unsaturated carboxylic acid monomer, the polyalkylene glycol unsaturated monomer (A2) having an oxyalkylene group bonded to a polyhydric alcohol residue, and the monomer component containing an unsaturated monocarboxylic acid monomer.

公开了一种多元羧酸共聚物，它是通过单体组分共聚制得的，所述单体组分包括聚二醇不饱和单体(A2)和不饱和一元羧酸单体，所述聚二醇不饱和单体(A2)具有使氧化烯基结合到多元醇残基上的结构，所述多元醇残基平均每个分子具有不少于3个羟基。

When BMSCs proliferated to enough cell number (7×106). 500 000 cells were centrifuged to a pellet and cultured in chondrogenic medium supplemented with DMEM high-glucose, insulin, transferring, selectin, pyroracemic acid, 2-pyrrolidine carboxylic acid, BSA, dexamethasone and ascorbic acid for 6 weeks.

当培养的骨髓基质干细胞达到7×106个细胞时，将每500 000个细胞离心制成高密度细胞微球，在含有DMEM高糖、胰岛素、转铁蛋白、选择素、丙酮酸、脯氨酸、 BSA、地塞米松、抗坏血酸的促软骨细胞分化培养液培养6周。

When BMSCs proliferated to enough cell number (7×10^6). 500 000 cells were centrifuged to a pellet and cultured in chondrogenie medium supplemented with DMEM high-glucose, insulin, transferring, selectin, pyroracemic acid, 2-pyrrolidine carboxylic acid, BSA, dexamethasone and ascorbic acid for 6 weeks.

当培养的骨髓基质干细胞达到7×10^6个细胞时，将每500000个细胞离心制成高密度细胞微球，在含有DMEM高糖、胰岛素、转铁蛋白、选择素、丙酮酸、脯氨酸、BSA、地塞米松、抗坏血酸的促软骨细胞分化培养液培养6周。

The invention relates to condensation products comprised of cyclic carboxylic acid anhydrides of dicarboxylic acids, tricarboxylic acid anhydrides or tetracarboxylic acid anhydrides and difunctional polyamines, especially polyoxyalkylene amines.

本发明涉及由二元羧酸的环状羧酸酐、三羧酸酐或四羧酸酐和二官能化多胺，特别是聚氧化烯胺制备的缩合产物。

More carboxylic acid structure made the initial adsorption rate of 2,4-D on black soil humic acid much faster than on chestnut soil humic acid.

黑土胡敏酸结构中较多的羧酸类基团使黑土胡敏酸初始吸附速率比栗钙土胡敏酸大得多。

The coupling reactions of Suzuki between the transitional metal-catalyzed phenylo boric acid and benzene halide and the Suzuki-Type between phenylo boric acid and carboxylic acid derivatives are two kinds of important reactions in constructing C-C bond.

过渡金属催化的苯硼酸与卤代苯之间的Suzuki和与羧酸衍生物之间的Suzuki-Type偶联反应是构建C-C健的两种重要反应。

The SERS of various concentration of Reactive Red, Acid Red, Acid Black, Direct sol orange and Calcon Carboxylic Acid adsorbed on silver colloid are studied by micro-Raman spectrometer. It has been found that the SERS intensity of absorbed molecules is mainly from the nearest molecule layer to the surface of silver colloid. That is, SERS has its single layer saturation effect. 2. The technique of direct deposition of silver colloid on a Kaolinite surface is first described.

以银溶胶作基底，利用显微拉曼光谱仪对不同浓度的活性艳红、酸性红、酸性黑、直接耐晒橙四种染料和钙羧酸指示剂的表面增强拉曼光谱进行了研究，结果表明，由于表面增强拉曼散射具有单分子层饱和效应和银溶胶系统对荧光的猝灭率很高，能吸附染料分子并增强拉曼散射的强度，且吸附分子的表面增强拉曼散射的强度，主要是由于最靠近银溶胶的一层分子的增强，而第一层以外的分子贡献很小。

Piperidinecarboxylic acid is used as the raw material and acetic acid as the acylating agent, followed by the addition of some acetic anhydride in the later stage to get an important organic intermediate n-acetylpiperidine-4 carboxylic acid in the yield of 92%. Toluene is used as the solvent instead of sulfinyl chloride in the acyl chlorination to produce n-acetylpiperidine-4-carbonyl chloride with the yield of 97%.

以4-哌啶甲酸为原料、醋酸为酰化剂，后期加入少量醋酸酐反应得到中间体N-乙酰基哌啶－4-甲酸，收率92%；在甲苯溶剂中进行酰氯化得目标产物N-乙酰基哌啶－4-甲酰氯，收率97%。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。