乙烯

R-1,c-2, t-3, t-4-1,3-bis(4-biphenyl)-2,4-di(4-pyridyl)cyclobutane was obtained in diluted sulfuric acid by photodimerization reaction.

通过反-1-(4-联苯基)-2-(4-吡啶基)乙烯在稀硫酸中的光二聚反应合成了r-1，c-2，t-3，t-4-1，3-双(4-联苯基)-2，4-二(4-吡啶基)环丁烷。

A mild spray with 2,3,5-triiodobenzoic acid brought them on nicely; but a stronger dose caused the plants to release ethylene, which digested the cell wall between leaf and stem and defoliated them.

适量的喷洒2，3，5-三碘苯甲酸可以达到令人满意的效果；但是过量的喷洒引起植株释放乙烯，从而溶解叶子和茎干间的细胞壁，造成秧苗脱叶。

Earlier this year, PCE and MDC announced they were forming a joint venture to offer MDC's proprietary Dymaxion drilling technology to companies in China, to help degasify their coal mines.

今年早些时候，四氯乙烯和麦道公司宣布，它们将组建一家合资企业，麦道公司提供的专有dymaxion 钻井技术给中国公司，以帮助degasify煤矿。

Earlier this year, PCE and MDC announced they were forming a joint venture to offer MDC's proprietary Dymaxion drilling technology to companies in China, to help degasify their coal mines.

今年早些时候，氯乙烯及民运宣布他们组建合资开办民运的专有技术dymaxion钻井公司在中国帮助他们degasify煤矿。

Results also show that micelles formed by nonylphenoxypolyethoxyethanol do not make the oligomer of BPR depolymerize.

聚氧乙烯型非离子表面活性剂胶束不会使BPR低聚体解聚，相反，在某种程度上，它还有利于BPR单体的低聚化。

The cracking reaction of Ethylidene diacetate is the key step to manufacture vinyl acetate from C1 compound. The technological development is based on the study of the reaction property and the reactor, and is guided by the process simulation results.

二醋酸亚乙酯裂解反应是C1路线制醋酸乙烯的关键步骤，其工艺的开发离不开反应过程的研究和反应器的确定，而过程数学模拟可以指导过程开发。

I report on corporate efforts to manufacture uncertainty about asbestos, lead, vinyl chloride, diacetyl, and a host of other chemicals.

报告对公司的努力，制造的不确定性，石棉，铅，氯乙烯，双乙酰，以及一系列其他化学品。

An anionic phenol-formaldehyde resin which synthesized by phenol, formaldehyde and some amine compound such as diethylamine, triethylamine and diethylene triamine was studied in this paper, and this modified phenol-formaldehyde resin was used in papermaking as an intensifier.

本文通过苯酚、甲醛与胺类化合物(二乙胺、三乙胺、二乙烯三胺)反应，得到阴离子性的酚醛树脂，并研究了将改性的酚醛树脂作为造纸增强剂应用在抄纸过程中。

VinylStudio is an easy to use, purpose-built application designed to digitalize or convert vinyl albums and tapes.

vinylstudio是一个易於使用，为特定目的而建造的应用设计数字化，或将其转换乙烯基相册和录音带。

This paper is studied on a new synthesis method of amino-modified organic silicone micro-emulsion of cationic style by one step with a silane-alkyl coupling,3-(2-aminoethyl)-aminopropyl methyl dimethoxy silane while opening-cyclo polymerization of the octa-methyl cyclo tetra siloxane,thus the optimal manufacturing conditions are determined by comparing test of their properties.

采用硅烷偶联剂氨乙基氨丙基甲基二甲氧基硅烷改性，八甲基环四硅氧烷开环聚合，探索一步合成阳离子型氨基改性有机硅微乳新方法，通过其性能测试得出其最佳工艺条件：反应温度：80℃，反应时间：3 h，十六烷基三甲基溴化铵用量：5%，脂肪醇聚氧乙烯醚用量：5%，预乳液滴加时间：2 h。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。