酯

Aromatic and aliphatic aldoxime s could be efficiently converted into the corresponding carboxylic acid esters by treatment aldoxime s with an alcoholic solution of 30% hydrogen peroxide in the presence of catalytic amounts of polystyrene-bound phenylseleninic acid.

在30%双氧水和醇组成体系中，聚合物负载的苯亚硒酸试剂可有效地促进过氧化氢氧化肟转变成羧酸酯；相应伯醇和仲醇的羧酸酯的产率中等到良好，但在含叔醇的体系中没有相应的羧酸酯生成。

The effects of flurocarbon surfactant,silane coupling agent, epoxy acrylate prepolymer and alumium silicate fine powder on the water resistant of acrylate structural adhesives were studied.

研究了氟碳表面活性剂、硅烷偶联剂、环氧丙烯酸酯预聚体以及硅酸铝粉末对丙烯酸酯结构胶耐水性的影响，制备出一种耐水性能优异的丙烯酸酯结构胶，其常温拉伸剪切强度为24。

In the field of the agriculture, the organic phosphor and the amido formylesters were the insecticides which were broadly used for a long time.

根据胆碱酯酶对乙酰胆碱和丁酰胆碱的选择性水解作用可分为乙酰胆碱酯酶和丁酰胆碱酯酶。

Results Compared with control areas,density of An anthropophagous deˉcreased by57.85%～100%and An sinensis decreased by27.06%～86.05%;the malaria incidence decreased by27.32%～100%.Cost calculation:the cost was0.59Yuan per person with deltamethrin bednet impregnation and1.17Yuan with deltamethrin impregnated bednets and alphamethrin residual spraying.

结果 实验区与对照区相比，嗜人按蚊密度下降57.85%～100%，中华按蚊密度下降27.06%～86.05%；疟疾发病下降27.32%～100%；以人均花费进行成本核算，溴氰菊酯浸帐灭蚊的费用为0.59元/人，溴氰菊酯浸帐加人群活动场所氯氰菊酯滞留喷洒灭蚊的费用为1.17元/人。

Results of test showed that DFA-PEG polyester and its derivant had excellentemulsification performance, and emulsion was exquisite and steady, the surfacetension and critical micelle concentration of DFA-PEG polyester and sulfatedDFA-PEG polyester were very low, DFA-PEG polyester terminated with rosin acid hadcertain antifoaming performance, but surface tension and CMC increase to extent.

性能测试表明，DFA-PEG聚酯及其两种衍生物均具有优良的乳化性能，乳液细腻且稳定；DFA-PEG聚酯及其硫酸酯盐水溶液的表面张力和临界胶束浓度较低：DFA-PEG聚酯松香酸酯还具有一定的抑泡性能，与DFA-PEG聚酯及其硫酸酯盐比，其水溶液表面张力和临界胶束浓度有所增加。

Effects of different additives such as sulfurized olefin,mixtures of amine phosphates,ester thiophosphates,N-containing agents and ashless rust-resistant agents on the emulsion stability ,EP/AW properties and rust-resistance of industrial gear oil were studied.

研究了硫化烯烃、磷酸酯胺盐、硫磷酸酯极压抗磨剂，含氮杂环衍生物多功能添加剂和防锈剂等，对工业齿轮油抗乳化性能、极压抗磨性能、防锈性能的影响；以及硫化烯烃、磷酸酯盐极压抗磨剂与含氮杂环衍生物多功能添加剂之间的协和效应。

Oxidative coupling ,and synergistic combination with ashless thiocarbamate,zinc thiocarbamate,sulfur and phosphorusfree molybdate,non-active organic borate and organic alkali metal salt.

文章介绍了几种提高胺类抗氧剂抗氧化能力行之有效的方法：氧化偶合以及与硫代氨基甲酸酯、硫代氨基甲酸锌、非活性钼酸酯、非活性硼酸酯和碱金属盐添加剂协同。

The experimental results show that using the feed technique of "starved state" can raise the conversion ratio of monomers, shorten the reactive time and get polymers with much more even distribution of molecular weight; the technique of adding azobisisobutyronitrile as an initiator first and then benzoperoxide as another initiator at later Stage of experiment can get higher initiating efficiency than using one initiator only.

结果表明：采用&饥饿态&聚合工艺可提高单体转化率，缩短反应时间，且所得到聚合物相对分子质量分布均匀；选用偶氮二异丁腈和过氧化笨甲酰两种引发剂进行复配，比选用单一引发剂的引发效果好；选用酯酸丁酯、正丁醇和丙二醇甲醚丙酸酯作混合溶剂，当配比为2：1：1时聚合体系稳定，聚合物的固体质量分数可达70%，且粘度适中。

A polyurethane which is obtained from ingredients comprising a high-molecular polyol, an organic polyisocyanate, and a chain extender comprising a specific trifunctional isocyanurate compound having an aromatic hydroxyl group and/or a benzylic hydroxyl group, and which has a crosslinked structure due to the isocyanurate compound.

从包含高分子量多元醇、有机聚异氰酸酯和扩链剂的成分得到的聚氨酯，所述扩链剂包括含芳羟基和/或苄羟基的特定三官能团异氰脲酸酯化合物，并且其由于异氰脲酸酯化合物而具有交联结构。

The results showed that in acetone and ethanol, solubilities of 3, 28-di-O-glutaryl-betulin were 33.52 and 22.65 times of those of betulin respectively; In water, solubility of 3, 28-di-O-glutaryl-betulin was 0.0021 g (100 mL water), and in PBS, solubility of 3, 28-di-O-glutary-betulin was 0.0015 g (100 mL PBS), the hydrophilicity of 3, 28-di-O-glutaryl-betulin was significantly increase.

结果表明，在丙酮和无水乙醇中，桦木酐戊二酸酯的溶解度是桦木醇的33.52和22.65倍；在水中，桦木醇戊二酸酯的溶解度为0.0021g（100mL水）；在PBS中，桦木醇戊二酸酯的溶解度约为0.0015g(100mL PBS)，目标产物的亲水性有了显著的改善。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。