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

代苯酮和苄为烷基化试剂,率和100%的转化率及100%的选择性得到了酚的O-烷基化

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

酸钠溶液中滴加适量的丙酮,在四丁基化铵催化下,高率得到四化碳。

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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.

用新的催化体系(铁-锑复合催化剂)催化三基铝(TEA)与甲烷进行烷基交换反应合成三甲基铝(TMA)。

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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.

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

方法无水醇为溶剂进行提取,采用红外分光光度法(化钾压片)进行定性鉴别。

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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.

2-基苯并咪唑和化钠为原料,在光照条件下用氯气置换出化钠中的素,合成兽药噻苯咪唑中间体-2-(二基)-苯并咪唑氢酸盐。

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

巴豆醛先与化氢加成,再与二醇缩醛化得到3-代丁醛缩二醇,收率80.8%。

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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).

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

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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%浓度的化锂用作吸收式制冷剂。在医药中,用作催眠剂和镇静剂。还用作锂电池的电解质。

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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.

研究了麦芽酚、基麦芽酚生中的碱式化镁废渣为原料制取;、硫和醇合成烷的方法。

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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.

通过对石油天然气性的研究,利用热泵机组的特点,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。

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keep out, keep out of, keep pace with, keep quiet, keep record, keep sb down, keep sb on, keep sb out of, keep sb up, keep silent,

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3G, 401(K), a,

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福尔摩斯基本演绎法第二季

I've got nothing to offer the man other than a few banal bromides.

除了那些陈词滥调,都说不了。

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Scishow 精选系列

There's still plenty of silver bromide left over, though.

但仍有很多的溴化银存在。

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斯泰尔斯庄园奇案

That idea of yours about the bromides was a stroke of genius!

你关于溴化物的想法真是天才之举!

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斯泰尔斯庄园奇案

Mrs. Inglethorp had a box of bromide powders, which she occasionally took at night.

英格里桑夫人有一盒溴化物粉末, 她偶尔会在晚上服用。

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斯泰尔斯庄园奇案

" I am still a little fogged as to how exactly the bromide business was done, " I remarked.

“对于溴化物业务究竟是如何完成的,仍然有点迷糊,”说。

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秘密花园(原版)

" If it amuses you perhaps it won't do you any harm. Did you take your bromide last night, Colin" ?

“如果它能让你开心,也许它不会对你造成任何伤害。你昨晚服用溴化物了吗,科林”?

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纽约时报 (New York Times)

It is a bipartisan bromide: In his November 2016 victory speech, Donald Trump promised to " harness the creative talents of our people."

201611月胜选演讲中,唐纳德·特朗普就承诺“发挥们人民的创造性才能”。

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斯泰尔斯庄园奇案

This solution deposits in a few hours the greater part of the strychnine salt as an insoluble bromide in transparent crystals.

该溶液在数小时内将大部分士的宁盐沉淀为透明晶体中的不溶性溴化物。

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化学 Crash Course

For instance, partial charges occur in hydrogen bromide because the electrons are more attracted to the bromide than they are to the hydrogen.

例如,部分电荷出现在溴化氢中,因为电子更容易被溴化物吸引, 而不是被氢吸引。

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夜色温柔(上)

Violet McKisco collapsed and Mrs. Abrams took her to her room and gave her a bromide whereupon she fell comfortably asleep on the bed.

维奥莱特·麦基斯科倒下了, 艾布拉姆斯夫人把她带到自己的房间, 给了她一张溴化物, 于是她在床上舒着了。

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研究生综合教程下

This fledgling field has already proved the truth of what once passed as bromide: What doesn't kill you can actually make you stronger.

大难不死,意志弥坚。

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斯泰尔斯庄园奇案

Anyway, she was familiar with the fact that the addition of a bromide to a mixture containing strychnine would cause the precipitation of the latter.

不管怎样,她很清楚在含有士的宁的混合物中加入溴化物会导致后者沉淀。

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Scishow 精选系列

When a photon hits a crystal of silver bromide on a film strip, for instance, it knocks an electron off a negatively-charged bromide ion to create an atom of bromine.

例如,光子撞击胶卷表面的溴化银晶体时,从带负电的溴离子上“敲掉”一个电子,生成一个溴原子。

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时代周刊 (Time)

PRESIDENT TRUMP DELIVERED A fairly traditional mix of barbs and bromides during his 80-minute State of the Union address on Jan. 30, but one seemingly anodyne claim was actually pretty audacious.

在1月30日发表的80分钟国情咨文演讲,总统特朗普继续走了冷嘲热讽和陈词滥调的老路,然而,其中一个看似平平无奇的主张实际上是非常大胆的。

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TED-Ed(视频版)

Physicians like Sir Charles Locock hypothesized that sedative drugs might calm overactive brain activity, a theory he confirmed by treating seizures with a medication called potassium bromide.

像查尔斯·洛克克爵士这样的医生假设镇静药物可能会平息过度活跃的大脑活动,他通过使用一种叫做溴化钾的药物治疗癫痫发作证实了这一理论。

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Scishow 精选系列

But the researchers were able to make rubber self-heal by replacing the sulfur in the rubber with a pair of charged molecules, or ions, called butyl imidazolium and bromide.

但是,研究人员可以通过成对的带电分子或离子替换其中的硫磺使这些橡胶自行修复,叫做丁基咪唑鎓盐和溴化物。

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Scishow 精选系列

Butyl imidazolium has a positive charge, and it's always accompanied by a negatively charged bromide, just like the ions of sodium and chloride that you find in table salt.

丁基咪唑鎓盐拥有正电荷,总是伴随着一个负电荷的溴化物,就像盐粒中的钠离子和氯离子。

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斯泰尔斯庄园奇案

I found: first, a fragment of green material; second, a stain on the carpet near the window, still damp; thirdly, an empty box of bromide powders.

发现:第一,绿色材料的碎片;第二,靠近窗户的毯上有污渍,仍然潮湿;第三,一盒空溴化物粉末。

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研究生英语综合教程

This fledgling field has already proved the truth of what once passed as bromide

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keep up, keep up with, keep watch, keeper, keepers, keep-fit, keeping, keeplist, keepsake, keepwell,

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3G, 401(K), a,
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