查询词典 benzene

Aniline compounds containing heptafluoroisopropyl was synthesized through taking sodium dithionite as evocating agent, and introducing heptafluoroisopropyl by free radical electrophilic substitution on benzene ring.

以连二亚硫酸钠为引发剂，在苯环上通过自由基亲电取代反应引入七氟异丙基，合成了一系列含七氟异丙基的苯胺类衍生物，研究了各种条件对反应的速度和收率的影响。

In recent years, more and more scientists modify the double bond or benzene ring of resveratrol to get higher active, lower toxicity derivates.

近年来越来越多的科学家对其进行结构改造以得到高活性化合物，例如对双键、苯环的修饰。

The relationship of benzene conversion or energy efficiency as a function of energy density was studied.

以Al2O3和Ag/Al2O3为催化剂，采用介质阻挡放电反应器降解空气中低浓度的苯(C6H6)，重点考察了苯的转化率、能量效率随能量密度的变化关系。

The influence of benzene solvent on the potential energy surface of the studied reactions is not significant.

苯溶剂对所研究反应的势能剖面影响不大。

The result suggested that estrone in aqueous solutions undergoes photodegradation resulting in the breakage and oxidation of benzene rings and production of compounds containing carbonyl groups.

应用荧光光谱法和红外光谱法研究了在125 W高压汞灯(λ≥365 nm)照射下，水中雌酮的光降解反应以及雌酮初始浓度、pH值及Fe3+对雌酮光降解速率的影响。

It is insolvable in water , and soluble in alcohol , ethyl acetate or benzene

本产品为类白色固体，产品不溶于水，可以溶于酒精、乙酸乙酯或苯。

It is slightly soluble in ethyl ether, petroleum ether, benzene and chloroform.

在空气中易潮解，微溶于乙醚、石油醚、苯、氯仿，其水溶液碱性。

It is easily soluble in water, acetone and alcohol, slightly soluble in ether, ethyl acetate, chloroform, and pyridine, unsoluble in benzene.

熔点151℃～154℃。易溶于水、丙酮与醇，微溶于醚、乙酸乙酯、氯仿和吡啶，不溶于苯。

The poly with p-aminophenyl-ethynyl as a side-group was synthesized through Pd-catalyzed Sonogashira coupling reaction between 4-[(2,5-dibromophenyl)ethynyl] aniline and 1,4-diethynyl-2,5-bis benzene.

通过单体4-[(2，5-二溴苯)乙炔基]苯胺和1，4-二乙炔基-2，5-二戊氧基苯之间的Sonogashira偶合反应合成了带有p-氨基苯乙炔基共轭侧基的聚对苯撑乙炔。

Methods: Used the methods of inflammatory caused by dimethy, benzene, acetic acid twisting, carbon expurgation and the experiments in diabetic model mice, to observe the pharmacological actions of tigogenin; and acute toxicity was observed.

采用二甲苯致小鼠耳廓肿胀法、小鼠醋酸扭体法、小鼠碳末廓清法、葡萄糖引起高血糖小鼠模型，观察剑麻皂素的药理作用；并对剑素麻皂素进行急性毒性实验。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。