查询词典 carboxylic acid

A process as claimed in claim 5 wherein the acid groups are carboxylic acid groups.

根据权利要求5人表示过程，其中的酸群体羧酸群体。

Nitric acid oxidation was found to reduce the surface hydroxyl groups in increasing the carboxylic acid groups.

硝酸氧化减少了碳纤维表面的羟基含量，同时增加了碳纤维表面的羧基含量。

"Lactic acid: Carboxylic acid found in certain plant juices, in blood and muscle, and in soil ."

乳酸：在某些植物的汁液、血液和肌肉里以及土壤里发现的一种羧酸。

"Lactic acid: Carboxylic acid found in certain plant juice s, in blood and muscle, and in soil."

乳酸：在某些植物的汁液、血液和肌肉里以及土壤里发现的一种羧酸。

As hereinbefore described acid groups and especially carboxylic acid groups are the preferred metal chelating groups.

为上文所描述的基团，特别是羧酸群体是他们的首选金属螯合组。

The results indicate that improving temperature to reflux, using low polarity solvent as dispersion medium and proper molar ratio of tetrabutyl titanate to stearic acid can bring out good modification. The function of tetrabutyl titanate is to react with the surface hydroxyl groups and adsorbed H2O on the powder particles to produce new binding sites such as M—O—Ti—OC4H9and M—O—Ti—OH, which can easily react with the carboxylic acid. As temperature increases from room temperature to reflux temperature, the reactions between RCOO- and Ti change from coordinate bonds to covalent bonds, which makes the carbon chains of stearic acids more strongly bound with the powder particles surface.

研究结果表明，提高处理温度、适当增加复合改性剂中硬脂酸的量并选用极性弱的有机溶剂可达到比较理想的改性效果；钛酸四丁酯的作用是与粉体粒子表面的羟基以及吸附水反应产生偶联点，如M—O—Ti—OH，这些偶联点易于与羧酸反应；在低温时RCOO-与偶联点的Ti之间以配合物的形式发生作用，在回流温度下处理时，主要发生酯化反应，使硬脂酸更牢固地嫁接到粉体粒子表面，改性效果更好。

Stearic acid A saturated carboxylic acid, which is widely distributed in nature as the glyceride ester.

硬脂酸：是自然界中以甘油酯形式广泛分布的饱和羧酸。

The studies of inhibitory activity of different hydantoin ARIs substituted by acetic acid residue can greatly benefit the structure-based drug design of ARIs.Keywords aldose reductase inhibitors, fidarestat, carboxylic acid methyl, synthesis,inhibitory activity

所分析的不同海因类抑制剂用乙酸链取代后的化合物的抑制性可以为以结构为基础的ARIs药物设计提供很好的实验基础。

The anhydride groups and acid chloride groups are preferably derived from carboxylic acid groups or oxyacid groups of sulphur and phosphorus.

该酸酐团体和酰氯团体最好来自羧酸群体或含氧酸硫和磷集团。

Pyruvic acid A 3-carbon carboxylic acid (CH3COCOOH) that is an intermediate in GLYCOLYSIS.

丙酮酸：一种三碳羧酸(CH3COCOOH)，是糖酵解的中间物。

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。