bromide GRE

1.Carbon tetrabromide was prepared from acetone and sodium hypobromite by adding tetrabutylammonium bromide.The yield and purity were very satisfactory.

向次溴酸溶液中滴加适量,在四丁基溴化铵催化下,高产率得到四溴化碳。

2.Trimethylaluminum(TMA),usually used in organic catalysis and organic synthesis,was synthesized by reaction of triethylaluminium (TEA) with methyl bromide on iron-stibonium complex catalyst.

用新催化体系(铁-锑复合催化剂)催化三乙基铝(TEA)与溴甲烷进行烷基交换反应合成三甲基铝(TMA)。

3.TEM, ethidium bromide displacement assays, agarose gel electrophoresis and SAXS studies support the formation of lipoplexes for the transfection of CHO cells.

【文献摘要】A new transfection reagent based on nucleoside phosphocholine amphiphile leading to high transfection efficacy and low cytotoxicity is described.

4.119.0 g of cyclopentyl bromide and 19.4 g of magnesium are reacted in ether or THF to give a cyclopentyl Grignard reagent.

119克环戊溴和19.4克镁在空气中或者四氢呋喃中加入环戊格林尼亚试剂作发生反应。

5.Methods Infrared spectrophotometry with potassium bromide tabletting was adopted,in which the extract was carried out with the absolute alcohol as the solvent.

方法以无水乙醇为溶剂进行提取,采用红外分光光度法(溴化钾压片)进行定性鉴别。

6.Using 2-acetyl benzimidazole and sodium bromide as raw material,2-(dibromine acetyl)-benzimidazole hydrobromate was synthesized with the new bromine that displaced by chlorine gas in light.

以2-乙酰基苯并咪唑和溴化为原料,在光照条件下用氯气置换出溴化中溴素,合成兽药噻苯咪唑中间体-2-(二溴乙酰基)-苯并咪唑氢溴酸盐。

7.Bromobutyraldehyde ethylene acetal was synthesized from crotonaldehyde by addition with hydrogen bromide and then acetalation with ethylene glycol with an overall yield of 80.

巴豆醛先与溴化氢加成,再与乙二醇缩醛化得到3-溴代丁醛缩乙二醇,收率80.8%。

8.The phenols were O-alkylated with 100% conversion and 100% selectivities using phenacyl bromide and benzyl bromide as alkylating reagents.

用溴代苯乙和溴苄为烷基化试剂,以高产率和100%转化率以及100%选择性得到了酚O-烷基化产物。

9.The cocktail used generally contains sodium thiopental (to anaesthetise the condemned man), pancuronium bromide (to paralyse his muscles) and potassium chloride (to stop his heart).

一般注射用混合针剂含有硫喷妥（麻醉犯人），泮库溴铵（麻痹犯人肌肉）和氯化钾（停止犯人心跳）。

10.By 52%-54% denisty indicator of lithium bromide, it is used to be absorptive refrigerant, hypnagogue and mitigative of medicine, and also to be electrolyte in ion-battery.

52%-54%浓度溴化锂用作吸收式制冷剂。在医药中，用作催眠剂和镇静剂。还用作锂电池电解质。

11.The paper studied the preparation of bromine from basic Magnesium bromide in the production of maltol and ethyl maltol, the synthesis of bromethyl from bromine, sulfur and alcothol.

研究了以麦芽酚、乙基麦芽酚生产中碱式溴化镁废渣为原料制取溴;以溴、硫和乙醇合成溴乙烷方法。

12.Through the research on petroleum and nature gas, design a multi-source heatpump of single and double effect lithium bromide, the two stage heatpump unit, process of nature gas liquefaction etc.

通过对石油天然气物性研究,利用热泵机组特点,设计多源单效制冷供热热泵机组、双效热泵机组、双级热泵机组及天然气液化流程。