查询词典 bromide

Dipropargylfluorene was prepared by the reaction of fluorene and propargyl bromide with the catalyst of NaOH/PhCH2N+Me3Cl in 85﹪ yield.

芴与炔丙基溴在NaOH/PhCH2N+Me3Cl催化作用下反应生成85﹪的二炔丙基芴。

The model solvents included ethanol,acetone,ethyl acetate and tetrachloromethane.And 1-hexyl-3-methylimidazolium bromide and 1-hexyl-3-methylimidazolium fluoroborate were used as the model RTIL.

结果表明，两种离子液体吸收乙醇或丙酮后，它们的电导率和介电常数显著增加，而四氯化碳对两种液体的电学阻抗特性影响较小。

Both star copolymer precursors are hydrolyzed in the acidic conditions, then the corresponding recovered star copolymers of EO and glycidol with multi pending hydroxylmethyls are esterified with 2-bromoisobutyryl bromide to produce the ATRP macroinitiators with multi pending bromoisobutyryl groups . Then the latters initiate the polymerization of styrene to form the corresponding amphiphilic three- and four-arm star PEO-g-PS.

在阴离子共聚EPEE单体和环氧乙烷单体的过程中，通过变换引发剂体系中的醇的结构(由原来的二元醇变成多元醇，如三羟甲基丙烷和季戊四醇)，合成了星形结构的共聚物，通过水解反应脱去保护基团后，再与2-溴异丁酰溴反应，得到链的侧端挂有很多2-溴异丁酸酯基的星形大分子引发剂，通过ATRP聚合机理引发苯乙烯聚合得到PEO为主链，PS为侧链的星形一接枝共聚物。

In this dissertation, the sodium bentonite was modified using hexadecyl trimenthyl ammonium bromide and cationic polyacrylamide.

本文以市售钠基膨润土为原料，分别以十六烷基三甲基溴化铵和阳离子聚丙烯酰胺为改性剂，制各了新型复合插层有机膨润土。

Also, the infrared spectroscopy experiments proved that the surfaces of CNTs could be coated by hexadecyl trimethyl ammonium bromide in ammonia solution. The dispersion of modified CNTs in water was improved significantly.

实验结果表明，通过混合酸处理能够使CNTs表面拥有较多的羟基和羧基官能团；在氨水的作用下，CNTs能够被HTAB所包覆，而且修饰后的CNTs在水中的分散性能得到提高。

The behavior for flotation separation of cobalt with sodium nitrate— ammonium thiocyanate —hexadecyl trimethylammonium bromide system and the condition for separation of cobalt with other metal ion were studied.

研究了硝酸钠—硫氢酸铵—溴化十六烷基三甲铵体系浮选分离钴Co的行为及其与常见阳离子分离的条件。

Surfactants of Hexadecyl trimethyl ammonium bromide and alkyl polyoxyethylene have a slow dying at a higher temperature and have accelerated dying at a lower temperature while leather dying with the curcuma dye.

而表面活性剂十六烷基三甲基溴化铵及平平加O对姜黄素在皮革的染色在较低温度下有一定的促染作用，在较高温度下有一定的缓染作用。

The adsorption characteristics of p -nitrophenol in wastewater on honeycomb briquet slag modified by triethanolamine or hexadecyl trimethylamine bromide were studied.

利用三乙醇胺、溴化十六烷基三甲胺分别改性蜂窝煤渣，研究了改性煤渣吸附水中对硝基苯酚的性能。

The sodium bentonite was modified by organic reagent hexadecyl trimenthyl ammonium bromide and cationic polyacrylamide. The structures of modified organo-bentonite and the effect of concentration of the intercalating reagent and reacting time on decoloring capacity were studied.

用阳离子有机改性剂十六烷基三甲基溴化铵和阳离子聚丙烯酰胺复合插层改性钠基膨润土，分析了改性膨润土的结构，研究了改性剂质量浓度及二次改性时间对复合插层膨润土脱色效果的影响。

The effects of the surfactants, trioctyl phosphine oxide, sodium dodecyl sulfonate and hexadecyl trimethyl ammonium bromide, on the extraction rate of Co^2^+ were investigated. The acceleration in the kinetics in contributed to the associated molecule~2 TOPO taking part in the extraction process directly. The decrement effects of SDS or CTMAB on the rate of extraction kinetics of Co^2^+ with HDEHP were also observed, which caused by the adsorption of molecules of SDS or CTMAB on the interface and decreased the interfacial adsorption amount of HDEHP. In addition, the extraction rate was reduced by a bigger margin in HDEHP-SDS system. This can be explained in terms of the formation of an electric field at the interface.

研究体系中加入不同表面活性剂所引起萃取速率的不同改变：三辛基氧化膦因与HDEHP形成可萃取的Co^2^+活性分子缔合物，降低了萃取过程活化能而使反应加速；十二烷基磺酸钠和十六烷基三甲基溴化铵因占据发生萃取反应的界面区，减小了HDEHP与Co^2^+反应的机会而使反应减速； SDS还因其在界面形成较强的负电场，造成Co^2^+的附加势能而使萃取速率有更大幅度的降低。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。