丁烯基

Acetaldehyde generated from the 2 - butene aldehyde carbonyl and the reaction is the condensation of methylene ...

由乙醛生成2－丁烯醛的反应是羰基与亚甲基发生缩合的。。。

The purpose of this study is to improve the storage stability and antifoam property of water soluble antirust coating.

为提高水溶性防锈涂料的储存稳定性、消除涂料吸附失干及不易消泡等缺点，以亚麻油、顺丁烯二酸酐和改性酚醛树脂加合而成的水性树脂为基料，与一定比例的防锈颜料、填料混合配制出一种新型水溶性防锈涂料。

It may result from the coupling of acarbonyl group in one molecule with the double bond in another molecule.

它是由一分子环丁烯二酮的羰基碳与另一分子的双键β-碳发生还原偶联的结果。

From the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonylmethylate, the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonyl- methylate followed by cycloaddition reaction, was tentatively proposed.

通过研究反应过程中分离出的副产物反丁烯酸二乙酯III和4，5-二氢吡唑-3，4，5-三羧酸乙酯IV，初步提出了反应经过乙氧羰基甲基化苯并二氮杂卓翁中间体V再发生环加成反应的机制。

Given the known reaction mechanism and general chemical considerations, we propose that nicotine, when used as the carbon source by P. putida J5, is catabolized to pyruvic acid via pyrrolidine pathway and then participates in the synthesis of vitamin pantothenate and CoA, which supply the energy for the normal functioning.

通过对突变位点基因的功能分析推测，假单胞杆菌可以将尼古丁代谢为2，5-二羟基吡啶，而2，5-二羟基吡啶可以进一步转化为丁烯二酸和丙酮酸，进而参与了泛酸和 CoA 的合成，为生理代谢提供基质。

Finally, the unreactive reason of 3,3-dinitro-1-butene in polymerization was analyzed.

分析了3，3-二硝基-1-丁烯自由基聚合反应失败的原因。

Alkenyl succinic acidas an anti-rust additive is generally used in steam turbine oil .

分别测定了含烯基丁二酸的汽轮机油/蒸馏水及汽轮机油/合成海水体系的界面张力、界面剪切粘度、油相粘度及乳状液稳定性。

The influence of microwave radiation on Ullmann reaction has been investigated by three Ullmann reactions, including triphenylamine formed by treating the diphenylamine with bromobenzene or Chlorobenzene which substitutes Iodobenzene; 4,4\'-dimethyltriphenylamine formed by treating 4,4\'-dimethyldiphenylamine with bromobenzene which substitutes Iodobenzene; 4,4\',4-trinitrotriphenylamine formed by treating 4-chloronitrobenzene with p-nitroaniline in this paper.

实验表明，在微波辐射条件下，顺式比反式迈克尔反应活性高；若在丁烯二酸的双键上引入甲基后，降低了进行迈克尔加成反应的活性；引入酯基对双键的影响比腈基有利于进行迈克尔反应，丙烯酸甲酯较丙烯腈的迈克尔反应活性高。

In order to solve the problems such as multiple components in products, long time of rectification, high energy consumption, low yield and purity of product occurring during the production of p - octyl phenol, the effects of reaction conditions including reaction temperature, reaction time, the molar ratio of phenol to diisobutene on the conversion and yield of the product were examined.

为解决对辛基酚生产过程中精馏时存在组分多、精馏时间长、能耗高、产品收率和纯度低等问题，用正交实验探讨反应温度、反应时间、苯酚与二异丁烯原料摩尔比3因素对原料转化率和产品对辛基酚收率的影响。

The intermediate which obtained from oximation of 7a-e reacted withmethyl N-(2-bromomethylphenyl)-N-methoxycarbamate to synthesize oxime ether methyl carbamate 3a-e.

以邻位卤代苯甲醛和3-丁烯-2-醇为原料通过钯催化&一锅法&反应合成了2-乙酰基茚7a-e，7a-e 肟化之后和N-(2-溴甲基苯基)-N-甲氧基氨基甲酸甲酯反应合成了肟醚类氨基甲酸甲酯3a-e，进一步胺解之后得到了肟醚类氨基甲酰甲胺3f-j。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。