查询词典 elasticity of substitution

Acetate Substitution, A benzene solution (10 mL, 20% w/v) of alkyl halide also containing 0.5 g of PEG or tergitol was added to 1.5 g of solid, dry potassium acetate and the resulting suspension heated to reflux.

醋酸换人，苯液（ 10毫升， 20 ％瓦/五）烷基卤化物还含0.5 g的聚乙二醇或tergitol添加以1.5克的固体，干燥醋酸钾和由此产生的悬浮加热回流。

It is also revealed that the refractoriness of Portland cement and alumina cement are actually at the identical level, and refractoriness of castable with low cement content of Portland cement, substitution of alumina cement, will not cause worsening of refractoriness.

研究还发现硅酸盐水泥耐火度与矾土水泥耐火度实为同一水平，低水泥耐火浇注料中硅酸盐水泥替代矾土水泥不会造成浇注料耐火度的恶化。

And 0.949〓 respectively. From the model, the substitution of Pro (119)αto Ala in bar-headed goose Hbα〓β〓 interface, which is unique among bird and mammal Hbs and thought to be critical for the enhanced oxygen affinity in bar-headed goose Hb, causes no significant change in protein structure.

大量的研究工作认为，鸟类和哺乳动物Hb分子中a〓β〓亚基交界面唯一的氨基酸突变：Pro（119）α→Ala对于斑头雁Hb分子O〓亲和性的提高是关键的。

Cellulose benzoate,the degree of substitution of which was calculated from the content of C determined by element analysis,was prepared from microcrystalline celluloseand benzoyl chloride under heterogeneous condition and characterized by FT-IR and~1H-NMR.

研究了微晶纤维素和苯甲酰氯在多相条件下合成制备纤维素苯甲酸酯的反应，通过元素分析所得碳的质量百分含量计算了产物的取代度，并系统研究了吡啶与N，N-二甲基乙酰胺或与三乙胺混合反应溶剂、苯甲酰氯与纤维素羟基的摩尔比r、反应温度和反应时间对D S的影响，用FT-IR和1H-NM R对产物进行了表征。

The only reference in the published literature to such a reaction was a note by Clark who reported-without experimental details-that benzaldehyde is converted to benzoyl chloride Indeed, in some cases,t-butyl hypochlorite has been known to effect substitution of hydrogen by chlorine.

在出版文学中仅有的参考这样一反作用was a指出经过克拉克，那苯醛存在在有些情形下的确使转而信仰苯酰氯化物在外面所报告的-实验details-的，t-丁基次氯酸盐已经被知道实现氢的代用在附近氯。

The thermokintics of nucleophilic substitution reactionsof benzoyl chloride and oxidation reaction of isopropanol by NBS have been studiedby using the mathematical models of the thermokinetic time-parameter method forsimple and consecutive first order reaction, respectively. The kinetic mechanisms ofstudied reactions have been discussed reasonably.

利用简单和连续一级反应的时间参量法的数学模型，分别研究了苯甲酰氯亲核取代反应和NBS氧化异丙醇反应的热动力学，对反应的机理进行了合理的解释和讨论。

A new organic compound:N,N'-bis(1,10-phenanthroline-2-formacyl)-4,4'-diamino-diphenylmethane was synthesized via oxidation,esterification,substitution,hydrolysis, amidation of 1,10-phenanthroline as the starting material with chemical reagents (hydrogen peroxide,benzoyl chloride,potassium cyanide,sodium hydroxide solution,4,4'-diamino-diphenylmethane).

以邻菲啰啉为起始原料，与双氧水反应合成邻菲啰啉-N-氧化物，接着与苯甲酰氯、氰化钾、NaOH水溶液一一反应合成中间体邻菲啰啉-2-甲酸，再与4，4′-二氨基苯基甲烷进行酰胺化反应合成目标产物。

An unusual substitution of 5-fluorouracils by the reaction of lithium salts of 1,3-dialkyl-5-fluorouracil with benzyl bromide is described.

1，3-二烷基-5-氟尿嘧啶的锂盐与苄基溴进行苄基化反应时产生了异常的反应结果。

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。

You added I liked before your beloved person ultra was lovable I thought you really only are treat as me her substitution, you do not love me, only was you wants in to like her to have on the lovable my body to seek the former days the mood I thought you have been really blurry, what has forgotten is the love?

你还说我像以前你心爱的人的超可爱。我想你真的只是把我当做她的替代，你根本就不爱我，只是你想在像她拥有可爱的我的身上寻找昔日的情怀。我想你真的迷糊了，忘了什么是爱？

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48