查询词典 ethene

It was found that the process of the dimerization of ethene can be divided into three steps: the chemical adsorption of first ethene molecule, the physical adsorption of second ethene molecule and the dimerization reaction.

研究表明，乙烯在分子筛上的二聚反应分三步进行：单个乙烯分子化学吸附→第二个乙烯分子的物理吸附→两乙烯分子二聚反应。

The reaction proceeds by ethene chemical adsorption to form the surface ethoxide and the C-C bond formation between the ethoxide and the second ethene molecule to form the butoxide product.

乙烯化学吸附生成的烷氧化合物与物理吸附的乙烯分子发生二聚反应生成新的C-C键同时生成新的烷氧化合物。

From the experiment discovered for the first time the dimethyl ether may substitute CO to take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and optimized the CH_3OCH_3-NO-HO_2 chemistry amplifying system determination condition, the CH_3OCH_3 best density is 1.876 ppmv, the NO best density is 1.3ppmv, and obtained this method chain length CL=124, 5 parallel determinations densities of HO_2 are the 44.0pptv, the relatively standard deviation is smaller than 4%; Although chemistry box model computed result indicated the dimethyl ether, the ethene, the propene and the ethanol all can take the chain-carrying agent of the peroxy free radical chemistry amplifier system, and their simulation chain length all grows up compared to the CO-NO-HO_2 chemistry amplifying systems, but experiments proved the ethene, the propene and the ethanol have not suit the chain-carrying agents.

首次从实验上发现二甲醚可以替代CO作为过氧自由基化学放大系统的链传递试剂，并优化了CH_3OCH_3-NO-HO_2化学放大系统的测定条件，CH_3OCH_3的最佳浓度是1876ppmv，NO的最佳浓度为1.3ppmv，并得到了这一方法的链反应长度(CL=124)，5次平行测定浓度为44.0pptv的HO_2自由基，相对标准偏差＜4％；虽然化学盒子模式计算结果表明二甲醚、乙烯、丙烯和乙醇都能作为过氧自由基化学放大系统的链传递试剂，并且它们的模拟链长都比CO-NO-HO_2化学放大体系的链长大，但是实验证明乙烯、丙烯和乙醇不适合作为过氧自由基化学放大系统的链传递试剂。

The influences of precooling methods on the respiration intensity, formation of ethene and the quality of 'Fraiar' and 'Angeleno' plum fruit were investigated.

以'黑宝石'和'安哥诺'李果实为试验材料，研究了冰水和风预冷对李果实呼吸强度、乙烯生成量及其贮藏品质变化的影响。

The calculated reaction energy barriers of ethene chemical adsorption and dimerization reaction are 108 and 149 kJmol^(-1), respectively.

计算得到的乙烯化学吸附和二聚反应的反应能垒分别为108和149kJmol^(-1)。

During the reaction, no ethene in the products was appeared.

真的想到这些我觉得真的一点都不想在这里了。

Effects of Precooling Methods on the Respiration Intensity, Formation of Ethene and Storage Quality of Plum Fruit

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Recent development in hydroformylation of ethene to propanal by catalytic synthesis is introduced in this paper.

目前世界上工业化生产丙醛多采用乙烯氢甲酰化反应催化合成，即用乙烯、CO和H2 在催化剂作用下合成丙醛。

The adsorption of ethene molecule on the protonic acid center of Tl site was also studies by ONIOM2 method.

另外对乙烯分子在分子筛酸性位(T1)上的物理吸附和化学吸附过程进行了研究。

The effects of double-functional ethene elastomer KTR-6C on the compatibility and mechanical properties of PC/PBT alloy were studied.

聚碳酸酯具有良好的力学性能、耐热性和电性能，特别是良好的耐冲击性能，在工程塑料中居首位。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。