查询词典 cyanide

The experiment consist of two parts :the first one research nucleophilic addition of m-dinitrobenzene, nucleophilic reagent is benzyl cyanide; the second one synthesize 2,4-dihydorxybenzophenone from 2,4-dichlorobenzophenone and NaOH.

实验分为两部分：第一部分研究了间二硝基苯的亲核加成反应，亲核试剂为苄基腈；第二部分是用2，4-二氯二苯甲酮与氢氧化钠反应制备2，4-二羟基二苯甲酮。

There are three different nucleophilic reagent respectively reaction with m-dinitrobenzene ramification at distint alkaline term:With the nitrobenzene 、 m-nirtobenzenesulfone sodium salt 、 2.4-dinitro chlorobenzene 、 m-dinitrobenzene for bottom thing, benzyl cyanide、 benzyl chloride、 benzyl chloropyridine、is a nucleophilic reagent reaction for under the different term proceeds a series reaction. At the same time ,discuss about the impact factor to nucleophilicity such as the number of attract electron group、 ability of attract electron and the nucleophilic substitution reaction part.

设计了三类不同的亲核试剂分别与活化芳环在不同的碱性条件下发生反应：以苄基氰、苄基氯化吡啶为亲核试剂，以硝基苯、间二硝基苯、间硝基苯磺酸钠、2，4-二硝基苄基氯为底物进行亲核取代反应；并且对亲核试剂的体积效应、溶剂效应对亲核性影响，底物上吸电子基团的数目、吸电子能力对亲电性的影响，以及亲核取代反应的发生部位受哪些因素影响进行探讨。

Hydrogen cyanide ; calcium oxide ; removal at high temperature

氰化氢； CaO ；高温脱除

Optimal pretreatment conditions of electroless nickel plating for magnesium were decided by many experiments. Phosphoric acid technology was used to instead of acid processing by chromium trioxide and ferric chloride, and excellent coating was obtained by using dipped zinc, cyanide copper, nickel as medium.

通过多次试验确定了镁及镁合金的前处理方案，以磷酸洗的方法代替传统的铬酐加三氯化铁酸洗浸蚀的前处理工艺，配置简单，操作方便，以浸锌层、氰化铜层和中性镍层作为化学镀中间层，得到了结合力良好的化学镀镍层，获得了镁合金表面处理的新突破。

A method of sodium chloride roast/acid leaching of copper/cyanide leaching to raise leaching rates of gold,silver and copper from copper-bearing gold concentrate was proposed.

提出了一个含铜金精矿加氯化钠焙烧—氰化浸出的工艺方法。

When we open and clean the chamber, odor as well as toxic gasese.g., hydrogen chloride, cyanogen chloride, hydrogen cyanide, etc.

在打开密闭反应腔及擦拭腔壁时会产生极刺鼻味道且含有HCl、HCN、CNCl等毒性气体，会逸散至洁净室，所造成劳工健康危害。

When we open and clean the chamber, odor as well as toxic gases(e.g., hydrogen chloride, cyanogen chloride, hydrogen cyanide, etc.) are released.

在打开密闭反应腔及擦拭腔壁时会产生极刺鼻味道且含有HCl、HCN、CNCl等毒性气体，会逸散至洁净室，所造成劳工健康危害。

Also like ackee, it can have undesirable consequences if not washed and prepared properly; the root vegetable contains enough cyanide to kill.

同样想西非荔枝果，木薯也有同样不受欢迎的地方，那就是如果它没有清洗干净或者没有合适烹饪，那么它的根部含有的氰化物足够使人致死。

At last, in the absence of molecular oxygen, dehydrogenation of FMMH〓 in Photobacterium phosphoreum might be interrupted by the reaction between the Cyanide Alcohol Carbanion and Flavin monoclevtide .

以相加作用的非极性麻醉型有机化合物、极性麻醉型有机化合物和反应性化合物为研究对象，分析了各种相加作用的不同本质。

Following the industrialization programme for gold nanomaterials, auric chloride acid, potassium gold cyanide, superfine and nano-scale gold powders and"liquid gold"can be produced systematically.

为贵金属纳米材料的产业化指明了方向。提出了以粗金为原料，在工业上生产氯金酸、氰化亚金钾、超细和纳米金粉、金水等含金深加工产品的产业化系统方案。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。