查询词典 carboxyl group

A novel phosphating processing that nickel salt, manganese salt, nitro acenaphthene and carboxyl group polymer were contained in self-made Zn system phosphating, was developed for electrophoretic coating.

在自制的低温锌系磷化液基础上，通过加入镍盐、锰盐和羧基聚合物，并以硝基苊为促进剂，研制出了一种适用于电泳涂装的低锌锰改性常温磷化工艺。

The invention aims at improving the quality of flour to researche a method for preparing new flour modifying agent, namely, the microencapsulation glucose oxidase, chitose-calcium alginate-glucose oxidase microcapsule which is obtained through the method is copolymer hydrogel which is obtained through double cross-linking, both amidogen and carboxyl group are fixed, and the whole system is a reticular formation.

本发明以改善面粉品质为目的，研究一种新型面粉改良剂――微胶囊化葡萄糖氧化酶的制备方法，采用上述方法制得的壳聚糖-海藻酸钙-葡萄糖氧化酶微胶囊，是经双重交联得到的共聚凝胶，氨基和羧基均被固定，整个体系为网状结构。

The experimental results indicate that the addition of NaOH is unfavorable to ammonolysis of α-CDA due to the participation effect of neighboring carboxyl group of α-CDA, which is contrary to the fact that strong alkaline environment is propitious to SN reactions of ordinary chlorinated hydrocarbons.

实验结果表明，与普通氯代烷的亲核取代反应不同，邻位羧基参与效应使得加入NaOH不利于α-CDA的氨解反应动力学和热力学。

Capric betaine was prepared through ammonolysis of α-chlorododecanoic acid with trimethylamine. The participation effect of the neighboring carboxyl group of α-CDA on dynamics and thermodynamics of the reaction was investigated.

以α-氯代十二酸与三甲胺的氨解反应制备α-癸基甜菜碱，研究了α-CDA在与三甲胺氨解反应中邻位羧基对反应动力学和热力学的影响。

The pH is equal to the of the carboxyl group.

他这种能力的人不能胜任这种工作。

This paper reports an improved headspace gas chromatographic method for determination of carboxyl group content in wood fibers.

报道了一种应用顶空气相色谱测定纸浆纤维羧基含量的方法。

The hydrophobic core serves as a reservoir for water-insoluble drugs.Hence,these nanoparticles can be used as carriers for hydrophobic drugs.For the synthesis of cholesterol-modified glycol chitosan conjugates,a carboxyl group was initially introduced to cholesterol molecule using succinic anhydride,and then covalently coupled with the primary amino group of glycol chitosan in the presence of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and N-hydroxyl succinimide.

本文采用二步反应将胆固醇接枝到乙二醇壳聚糖，首先将胆固醇进行羧基化，将胆固醇与琥珀酸酐反应生成胆固醇半琥珀酸酯，然后用1-乙基-3-(3-二甲基氨丙基)碳二亚胺盐酸盐与N-羟基琥珀酰亚胺作为偶联剂，将胆固醇半琥珀酸酯的羧基与乙二醇壳聚糖主链的氨基进行反应，得到胆固醇疏水改性乙二醇壳聚糖共聚物。

At first,the amino group of amino acid esters interacts with the carboxyl group of the amino acid residue of this porphyrinatozinc to form 1:1 adducts.

氨基酸酯的氨基首先与氨基酸残基的羧基作用形成1：1的加合物，然后与锌卟啉的中央锌原子配位形成1：2的加合物，客体分子与主体分子上的氨基酸残基之间的排斥作用以及主客体之间的色散力作用是主体分子能识别客体分子的另外两种作用。

The results of FT-IR 1H-NMR indicate the structure of polyester, and the 13C-NMR analysis of three quaternary carbon showed the existing of hyperbranched struscture, MALDI-TOF MS showed the hyperbranched polyester structure, the degree of branching of the polyesters determined by 13C-NMR being 0.408. The esterification reaction kinetics followed a second-order equation and the reaction rate was controled by the concemtration of carboxyl group and hydroxyl group,-d/dt=K.

以IR、1H-NMR证实了聚酯结构的存在，13C-NMR谱图上3种季碳的特征峰有力证实了超支化分子结构的存在，MALDI-TOF MS证明了超支化聚酯的成功合成，并计算超支化聚酯的支化度为0.408；探讨并建立了超支化聚酯的缩聚反应动力学方程－d/dt=K，该缩聚反应属于二级反应，反应速率由羟基浓度和羟基浓度共同决定。

"Fatty acids are carboxylic acids with a long hydrocarbon chain, usually straight, as the fourth substituent group on the carboxyl group that makes the molecule an acid."

脂肪酸一般由一条偶数碳原子的直链组成，整个长链上及其一端都有氢原子，另一端有一个羧基，所以是一种羧酸。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。