醚的

The ether oxygen groups and the carbonyl groups of polyurethane could"solvate"alkali metal cation and play the role of driving force of metal cation transport in the systems.

聚醚型超支化聚氨酯中醚氧和羰基集团，相对线性聚氨酯能更有效地通过"络合"和"解络合"方式，起到"溶解"和推动碱金属阳离子传输的作用。

To develop an eco-friendly epoxy impregnating resin system for groundwall insulation of large generators, the curing reaction mechanism has been fully studied, the formulation and the curing techniques have been optimized, and the influence of different constitution on the curing reaction, microstructure, and final performances have been studied and characterized.In this paper, influences of different reactive organo-siloxanes on the curing reaction and performances of epoxy V.P.I.

本文研究比较了含有环氧基、氨基或乙烯基的反应性硅氧烷，包括：γ-缩水甘油醚氧丙基甲基二乙氧基硅烷、β-(3，4环氧环已基)乙基三乙氧基硅烷、γ-缩水甘油醚氧丙基三甲氧基硅、β-(3，4环氧环已基)乙基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、乙烯基三乙氧基硅烷和苯胺甲基三乙氧基硅烷对环氧V.P.I。

This paper introduced the quantitative analysis method of kresoxim-methyl technical by gas chromatography with HP-5 capillary column and using triphenyl phosphate as internal standard.

介绍了醚菌酯原药样品的气相色谱定量分析方法，选用HP - 5石英毛细管柱，以磷酸三苯酯为内标物，进样口和检测器温度均为 2 5 0℃，柱温为 2 30℃，对醚菌酯原药进行测定。

Three kinds of optically active pnthalocyanine derivatives modified with chiral 2'-methyoxy-1,1'-binaphthyl; chiral binathyl crown ether; chiral 6,6'-didodecyl- 1,1'-binaphthyl crown ether, have been synthesized and characterized, respectively.

本论文以手性联萘、手性联萘冠醚、冠醚等功能性基团为化学修饰基元，分别合成了三类光学活性酞菁衍生物和两类共轭聚合物，对它们的组装行为以及某些光、电功能性进行了研究。

The active compound Celangulin-V, which is the main active compound against insect pest from Celastrus angulatus Max, was modified at its 6-OH and the core structure β-dihydroagarofuran polyol of Celangulins from the basic hydrolysis of the extract of the root bark of Celastrus angulatus Max was modified by combinatorial chemical method.

主要结果如下： 1、合成了苦皮藤素V6-乙酯、6-烯丙基醚和6-酮等衍生物，通过NMR方法鉴定了化合物的结构，经文献检索均为新化合物，生测结果表明酮衍生物丧失了杀虫活性，乙酯衍生物与苦皮藤素V活性相当，醚衍生物较苦皮藤素V活性提高11倍。

The photochemical degradation of four typical fatty amine flotation collectors, decyl propyl ether amine, dodecyl propyl ether amine, laurylamine, and stearylamine, in water was studied.

对水体中脂肪胺阳离子浮选捕收剂（癸烷基丙基醚胺、十二烷基丙基醚胺、十二胺和十八胺）的降解方法与效果进行了研究。

The trifluoroethylester silane was synthesized by modifying a PEG diacid to form the corresponding bistrifluoroethylester, followed by a reaction with 3-aminopropyltriethoxysilane.

通过用PEG二酸修饰合成三氟乙基乙烯醚硅烷，由此形成相应的双丙烯酰胺三氟乙基乙烯醚，再将其与3-APS相互作用。

A series of polyether based polyurethaneurea aqueous dispersions with well-defined hard segments were prepared by fractional steps with polyether polyol, 4,4'-diphenylmethane diisocyanate, dimethylolpropionic acid, 1,4-butanediol, isophorone diisocyanate and ethylenediamine.

以二苯基甲烷二异氰酸酯、二羟甲基丙酸、1，4-丁二醇、异佛尔酮二异氰酸酯和乙二胺为硬段，聚醚多元醇为软段，通过分子设计采用分步合成法，制备了具有规整硬段和良好分散性能的聚醚型聚氨酯脲水分散液。

A series of polyether based polyurethaneurea aqueous dispersions with well-defined hard segment s were prepared by fractional steps with polyether polyol, 4,4′-diphenylmethane diisocyanate,dimethylolpropionic acid,1,4-butanediol,isophorone diisocyanate and ethylenediamine.

以二苯基甲烷二异氰酸酯、二羟甲基丙酸、1，4-丁二醇、异佛尔酮二异氰酸酯和乙二胺为硬段，聚醚多元醇为软段，通过分子设计采用分步合成法，制备了具有规整硬段和良好分散性能的聚醚型聚氨酯脲水分散液。

In order to investigate the mechanism for this reac-tion, methyl α-bromoacetate or ethyl α-bromoacetate as starting material was added to the solution of phenyl selenoamide in ethanol in 1∶1 or 2∶1 molar ratio under the neutral condition at room temperature. The results indicated that the same product bis or bis diselenide was formed. Byproduct ethyl benzoate was also separated.

为了研究该反应机理，选择α-溴代乙酸甲酯或α-溴代乙酸乙酯在无催化剂、中性条件下，乙醇溶液中与苯基硒代酰胺室温下反应，投料比为1∶1和2∶1，结果也都生成了同一类产物二甲氧羰基甲基二硒醚或二乙氧羰基甲基二硒醚，同时还分离得到了相应的副产物苯甲酸乙酯。

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。