乙烯的

A method for predicting product-yields of naphtha steam cracking was established by means of BP neural network model.

目前，工业上生产乙烯的主要方法是在管式裂解炉中采用热裂解法。

This product is a polyvinyl chloride and vinyl acetate plasticizer.

本品是聚氯乙烯和醋酸乙烯的增塑剂。

The chemical and physical characteristics and applications of polytetrafluoroethylene fiber are introduced.

介绍了聚四氟乙烯的化学、物理等特性及其应用。

Micronucleus test of Vicia faba root tips cell is used to research the genotoxicity of Trichloroethylene.

应用蚕豆根尖微核试验研究了三氯乙烯的遗传毒性。

The paper introduces the technologies to recover dilute ethylene in FCC dry gas from refinery,including pressure swing adsorption,conjugation absorption separation,intercooling oil absorption,advanced recovery system,and membrane separation,and makes a comparison among the technologies.

介绍了炼厂催化裂化干气稀乙烯的回收技术，包括变压吸附、配合吸收分离、中冷油吸收、先进回收系统、膜分离技术，并对这几种技术进行了比较。

An ester or a salt of perchloric acid.

一种甲醛乙烯的聚合物。

Mercaptopropyl methyldimethoxysilane was synthesized by thiourea in the presence of tetramethylammonium iodine as a catalyst and mixed liquid containing ethylenediamine and trichloroethylene as a neutralizer, without solvent, in which the reaction temperature, catalysts ,neutralizer and their amounts were optimized.

以四甲基碘化铵为催化剂，乙二胺和三氯乙烯的复合液为中和剂，在无溶剂体系中，用硫脲法合成了甲基巯丙基二甲氧基硅烷。

It is selected, for example, from the group consisting of the following complexing agents including o-chloranyl (3,4,5,6-tetrachloro-1,2-benzoquinone), p-chloranyl (2,3,5,6-tetrachloro-1,4-benzoquinone), nitrobenzene, trinitrobenzene, or tetracyanoethylene.

它是例如选自o-氯冉基(3，4，5，6-四氯-1，2-苯醌)、p-氯冉基(3，4，5，6-四氯-1，4-苯醌)、硝基苯、三硝基苯或四氰基乙烯的络合剂。

It is envisaged that the spheres would be made of a plastic known as Ethylene tetrafluoroethylene, the material used to build the Beijing Aquatic Centre.

根据设想，这些气泡将由名为四氟乙烯的塑料制成，这种材料同样用在了北京水上运动中心。

G. by wind or rain. The abscission layer is activated by increasing levels of ethylene and a decreasing concen-tration of auxin

当增加乙烯的释放量或减少生长素浓度时，离层便可以被激活。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。