乙烯

The catalytic features of olefin polymerization were studied under different conditions.

用所合成的茂金属化合物与MAO所组成的催化体系对乙烯、丙烯的聚合进行了研究。

Epoxides, episulphides and ethylene imines also polymerize via similar cyclic onium ion mechanisms.

环氧化合物，环硫化合物和乙烯亚胺也可以按类似于环氧？睦胱拥幕？理进行聚合。

Epoxides, episulphides and ethylene imines also polymerize via similar cyclic onium ion mechanisms

环氧化合物，环硫化合物和乙烯亚胺也可以按类似于环氧？

The advantages of the hybrid CIS-DFT method are that it can determine the symmetry of molecule and the correct order of excitation as well as the Molecular Orbital electron configuration;thereby the electronic excitation states of ethylene are easily derived, and most of them are in agreement with those obtained in experiments or references.

CIS-DFT的优点在于能确定外场下分子的对称性，给出正确的激发顺序以及分子轨道的电子组态，由此导出乙烯分子的激发态，结果与实验一致。

We hope that the understanding on the reactivity of gas-phase osmium oxide cations with methane is helpful for the design of catalyst for the similar reactions.

所以甲烷和乙烯中C-H键的活化具有重大的经济和环境价值，也是最具基础意义的化学前沿课题之一。

Thecompound 2-1 can also react with CO and DPPB to give osmium vinyl compound 2-4and 2-5,respectively.

这可以看做是[4+1]环化法在合成金属呋喃方面的应用。2-1与CO以及DPPBPh_2P(CH_2_4PPh_2反应分别得到锇乙烯基化合物2-4和2-5。

The factors such as overhigh ethylene content in product, too fast operation for grade changeover and low production load when starting grade changeover usually caused a blockage in belt connection between loop reactors in polypropylene plant.

产品中乙烯含量过高、转产控制过快以及转产时负荷控制太低等都会导致聚丙烯装置带连接堵塞。

Changes of the activity of ACC oxidase were coincident with that of ethylene production and ABA content.

乙烯在跃变型果实成熟中的作用已被普遍认可[2]，而脱落酸在非跃变型果实的成熟过程中起关键作用[3 4]。

This paper has studied the relationship between the peeling strength and the relative amount of oxygen - containing groups produced on the surfaces of propylene homopolymer, ethylene - propylene block copolymer and random copolymer when ozonization was used to improve the coating properties of PP surface.

研究了用臭氧氧化法对聚丙烯表面进行涂装性改良时，丙烯均聚物、乙烯—丙烯嵌段共聚物及无规共聚物表面上含氧官能团相对生成量和涂膜剥离强度之间的关系。

Batch experiment was carried out to measure soil/air partition coefficientfor trichloroethylenein three selected soils(yellow,paddyfield and black soil)as a function of temperature.

采用批量实验测定了三氯乙烯在三种土壤中的土/气分配系数，考察了温度对TCE在土壤中KSA的影响。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。