查询词典 olefinic

With the lowest energy, the olefinic carbon addition-elimination channel to yield CH2CN+CO is most important among all the channels.

烷基碳加成消除生成CH2CN+CO的通道能垒低于其他任何通道，从动力学角度看该通道是最佳反应通道。

Recent developments of clean oxidation systems catalyzed by polyoxometalates are summarized in detail. The emphasis is on the epoxidation reaction of olefinic compounds, oxidation of alkanes and aromatic compounds with the comparatively ideal oxidants, hydrogen peroxide and molecular oxygen respectively.

文本总结了多金属氧酸盐在液相清洁催化氧化方面的进展，主要针对以过氧化氢和分子氧为氧化剂的烯烃类化合物的环氧化反应、烷烃和芳香族化合物的氧化反应，并详细探讨了此类氧化反应的反应机理。

The empirical rule governing the position of double bonds in olefinic acids was referred to by analyzing electron impact spectra of the chemical products modified by 2-amino-2-methylpropanol of the fatty acids. This method provides a new technical tool for analyzing fine structures of unsaturated fatty acids.

通过解析不饱和脂肪酸2-氨基－2-甲基丙醇化学修饰产物的EI质谱图，得到了不饱和脂肪酸中碳碳双键的定位规则，从而为分析不饱和脂肪酸精细结构提供了手段。

Investigated the organic surface modification of anatase titanium dioxide pigment and its adsorption mode. It was founded that the surface hydroxyl groups are the active centers for olefinic acid. The adsorption of modifier fit Langmuir single molecule layer adsorption mode.

研究了锐钛型钛白的有机表面改性及表面吸附模型，认为表面羟基是有机烯酸表面改性的活性中心，改性剂在钛白表面的吸附符合Langmuir单分子层吸附模型。

Olefinic oxides,such as epoxides,ketones and aldehydes mainly prepared by oxidation of olefines,are important chemical intermediates, which are widely used in fine chemicals,polymer materials,organic synthesis,perfumer and medicament.

烯烃的氧化物是重要的化工原料，主要通过烯烃的氧化反应得到，广泛应用于精细化工、高分子材料、有机合成香料及医药等行业。

Recent developments of clean oxidation systems catalyzed by polyoxometalates are summarized in detail. The emphasis is on the epoxidation reaction of olefinic compounds, oxidation of alkanes and aromatic compounds with the comparatively ideal oxidants, hydrogen peroxide and molecular oxygen respectively. The oxidation mechanisms are elucidated in detail.

文本总结了多金属氧酸盐在液相清洁催化氧化方面的进展，主要针对以过氧化氢和分子氧为氧化剂的烯烃类化合物的环氧化反应、烷烃和芳香族化合物的氧化反应，并详细探讨了此类氧化反应的反应机理。

Assignments have been made on the spectra for all peaks of the Aliphatic and olefinic carbons using chemical shift corrective terms together with furukawa parameters.

本工作用~(13)C-NMR进行了研究，得到的聚合物的~(13)C-NMR图谱表明，聚合物的脂碳部分共有十一个共振峰，烯碳部分有九个峰。

The results showed that the yields of coke and dry gas decreased first and then increased ,and olefinic content in gasoline and C 3 olefinicity decreased by 2.0% and 1.2% respectively at the similar heavy oil conversion when the amount of que...

结果表明：在控制相近的重油转化深度下，终止剂用量占处理量 1 %、1 0 %和 1 6%时，焦炭和干气产率均先降低后增加，汽油中烯烃含量和C3 中烯烃质量分数则分别降低 2 。0和 1 。2个百分点，汽油中异正构烷烃比增加，二烯值降低，诱导期增加超过 1 0 0min ；终止剂注入点由提升管中部移至上部而其他条件不变时，汽油中烯烃和C3 中烯烃质量分数分别增加 4.2和 0 。6个百分点

The Fourier transform infra-red spectroanalysis revealed the structure characeristics of the sulfonated copolymers, in which the characteristic absorption peaks of all the functional groups appeared in the corresponding spectrogram, and there was no olefinic band at 1635-1620cm〓.

三种磺化共聚物的特征吸收峰均较好地显示在相应的红外光谱图上，同时在1635-1620cm〓处未见碳碳双键的吸收峰。

The osmium-catalyzed asymmetric dihydroxylation of olefins provides one of the most effective methods for the preparation of vicinal diols. Almost all kinds of olefinic substrates can be transformed to the corresponding diols by means of AD reaction. The chiral osmium catalyst is generated in situ by the chiral ligand complexing with OsO〓 in the reaction.

手性锇催化剂催化的烯烃不对称二羟基化反应是合成手性邻二醇最有效的途径之一，可以将几乎所有类型的烯烃转变成相应的手性邻二醇，因此广泛地应用于药物、天然产物以及精细化工产品的合成。

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。