查询词典 hydrogen

I am still asked on occasion whether I am not sorry for having invented such a terrible thing as the hydrogen bomb.

我在一些场合下依然会被问及对于研发出这样一个可怕的氢弹是否心有愧疚。

Not much later, in a private conversation, Enrico told me, Go ahead with the work on the hydrogen bomb, if you must.

过后不久，在一个私人会议上， Enrico 告诉我，继续研究氢弹吧，如果你一定要进行研究的话。

However, implementation process is difficult because propene and hydrogen bromide are gases.

然而丙烯和HBr都为气体，实现此过程困难很大。

Bromopropane is produced from hydrogen bromide and propene in the presence of catalyst by free radical addition process.

丙烯与溴化氢在催化剂作用下，进行自由基加成反应生产1-溴丙烷。

But the one step method that taking propene and hydrogen bromide as material synthesized 1-bromopropane was low cost, obtaining high-purity product ,and it's production process has no pollution to environment. One step method be deemed to the optimum method.

而以丙烯和HBr气体一步直接合成1-溴丙烷的方法成本较低，所得产物纯度较高，且其生产过程对环境是绿色的，可以说是生产1-溴丙烷的最佳方法。

Tianrun company's existing 120 employees, of whom 15 were engineers, 3 senior engineers who enjoy special government allowances of experts one person, the company brominated long-term commitment to new product research and development, with a full range of laboratory facilities, laboratory room, to carry out most of bromine series products, small-scale test, pilot and laboratory experiments, subjects are as follows: high-quality three-bromo-phenol in the test, hydrogen bromide by-product utilization in the test, 1,000 tons of bromine dodecane-generation pilot project.

天润公司现有职工120余人，其中工程技术人员15人，高工3人，享受省政府特殊津贴专家1人，公司长期致力于溴系新产品的科研开发，拥有设施齐全的实验室、化验室，能够进行大部分溴系列产品的小试、中试实验及化验，现正进行的课题为：高品质三溴苯酚的中试，副产溴化氢的综合利用中试，1000吨溴代十二烷项目中试。

Bromoethyl benzene was synthesized by anti-Markovnikov addition of hydrogen bromide to styrene under ultraviolet light irradiation.

在紫外线的照射下，苯乙烯与溴化氢气体发生反马氏规则自由基加成反应，可合成β-溴乙苯。

This new methods can shun corrosiveness of liquid bromine or gas hydrogen bromide released during bromating reaction to the equipments and eliminate harmfulness to the operating worker and environment.

研究以溴化钠/溴酸钠完全代替传统的溴素作为溴代试剂合成了四溴双酚A，避免了使用溴素和因溴素作为溴代试剂时产生的溴化氢对设备、操作人员以及环境的危害。

Bromoethyl benzene was synthesized by anti-Markovnikov addition of hydrogen bromide to styrene.

通过苯乙烯与溴化氢气体发生反马氏规则自由基加成反应，合成了β-溴乙苯。

The experimental result showed that three byproducts was formed and the optimal condition was as follows: the molar ratio of ethylene glycol, hydrogen bromide, and acetic acid was 1:1:1.3, when ethylene glycol was 1 mol, refluxed 5 h under the action of 100 mL toluene.

结果表明：较适宜的合成条件为乙二醇1 mol， n：n：n=1：1：1.3，在带水剂甲苯(100 mL)的作用下，回流反应5 h，约4 h后分两次追加0.12×2 mol醋酸酐，合成效果最好，产率可达到95%，反应副产2-溴乙醇及少量的1， 2-二溴乙烷、乙二醇二乙酸酯和二乙二醇二乙酸酯。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。