查询词典 acid ester

The present invention discloses a method for separating and extracting polyhydroxy fatty acid ester from bacterial thallus.

本发明公开了一种从细菌菌体内分离提取聚羟基脂肪酸酯的方法，以便能够有效地从细菌菌体内分离提取聚羟基脂肪酸酯。

By the experiments of friction and abrasion with the ball-plate fricti on testing machine, the effects for lubricant properties on different contents o f Triethanolamine oleic soap, boric acid ester and Thiocarbamide in a series of cutting fluid s were compared and that the three kinds of additives have good coo perating lubricating functions is presented.

利用盘球式摩擦磨损试验机进行摩擦磨损试验，比较了金属切削液中分别加入不同含量的油酸三乙醇胺、硼酸脂、硫脲对自制合成切削液润滑性能的影响，认为三者有良好的协同润滑作用。

By the experiments of friction and abrasion with the ball-plate fricti on testing machine, the effects for lubricant properties on different contents o f Triethanolamine oleic soap, boric acid ester and Thiocarbamide in a series of cutting fluids were compared and that the three kinds of additives have good coo perating lubricating functions is presented.

利用盘球式摩擦磨损试验机进行摩擦磨损试验，比较了金属切削液中分别加入不同含量的油酸三乙醇胺、硼酸脂、硫脲对自制合成切削液润滑性能的影响，认为三者有良好的协同润滑作用。

The surfaces of nano-TiO2particles were treated by titanic acid ester couplingagent before blending with PS.

采用钛酸酯偶联剂对TiO2进行表面处理并与聚苯乙烯共混改性。

The results showed that the effects of the oxidized starch and the glutin on solution time in the water were obvious, while the glycerin, sodium laureth sulfate and metacrylic acid ester had less influence.

实验结果表明：氧化淀粉和明胶用量对氧化淀粉改性PVA水溶性薄膜的水溶性影响非常显著，而甘油、十二烷基醚硫酸钠、甲基丙烯酸酯对水溶时间的影响较小。

Moreover, when changing the equivalence ratio of isocyanic acid ester and hydrogen class compound, solid's performances also change along with it.

并且，改变异氰酸酯和含活泼氢类化合物的当量比，因交联密度的不同，所得的固结体的性能也随之有所变化。

Keywords: methyl carbamate, isocyanic acid ester, polyurethane, green chemical technology, dimethyl carbonate

中文关键词：氨基甲酸甲酯；异氰酸酯；聚氨酯；绿色化工；碳酸二甲酯

When changing the flexible segment -- hydroxyl polyether's type and its molecular weight, and rigid segment -- aromatic isocyanic acid ester's type and function, solid's intensity, the heat resistance, the compressive strength and other performance will also vary.

改变氰凝预聚体结构中的柔性链段——端羟基聚醚的种类和分子量，或调节刚性链段——芳香族异氰酸酯的种类和官能度时，对固结体的强度、耐温性、抗压强度和其它性能可以进行控制。

This project quests for a new route for synthesizing polyurethane not only with mild reaction conditions but also without environmental pollution basing on the fact that virulent phosgene used in the industrial process to produce isocyanic acid ester has badly been polluting the environment at present. And this project belongs to the research in basic application science.

本项目基于目前工业生产异氰酸酯过程中采用剧毒光气对环境造成严重污染这一事实，探索出了一种反应条件温和、无环境污染的新的聚氨酯合成路线，属于应用基础研究。

This project mainly exploratorily studied that polyurethane was produced via condensation reaction between polyhydroxylated compounds and methyl carbamate, which was firstly synthesized by dimethyl carbonate and amines. The process is a green route because it turns away the synthesis and the utilization of toxical isocyanic acid ester.

本项目主要探索性地研究了碳酸二甲酯和胺类化合物反应生成氨基甲酸甲酯，然后氨基甲酸甲酯再和多羟基化合物直接反应得到聚氨酯材料，从而避免了异氰酸酯的合成和使用。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷