乙烯

The isotactic polypropylene obtained with Et3 Al contained ethylene units when the ratio of Al to Ti was 150 at 100℃.However,the isotaetie polypropylenes obtained with i Bu3 Al and Hex3 Al at 100℃ did not contain isobutene and hexene units.

助催化剂为Et3Al聚合得到聚丙烯链结构中含有少量乙烯共聚单元；而助催化剂为Me3Al， i Bu3Al和Hex3Al聚合得到聚丙烯链结构中没有发现共聚单元。

Dihydrojasmone was synthesized from2-hexyl-5-methyl-1,2-oxaborolane,prepared frommethyl vinyl ketone and hexene,via the homologationwith 〓 followed by PCC oxidation and intra-molecular condensation.In stead of the oxidation ofthe C-B bond of 1,2-oxaborolane,fluoride inducedhalogenation of 2-alkoxy-1,2-oxaborolane was found togive 3-halopropanol.

硼氢化甲基乙烯基酮和已烯得到的2-已基-5-甲基-1，2-氧硼杂环戊烷与〓反应，再经PCC氧化，分子内缩合得到二氢茉莉酮。1，2-氧硼杂环戊烷的C-B键除氧化断裂之外，也能够在〓或KF作用下卤化断裂成碳卤键。

Homologic fragments of ethylene synthesis and signal transduction related genes,including ACS、 ACO、 ETR1 and EIN3, were isolated from petals by RT-PCR, and were named PsACS GenBank No.

花瓣中ACS活性变化与内源乙烯的生成相关，说明ACS是影响牡丹切花开放衰老进程的主要因素。

Combined with the hygrothermal aging behavior of vinyl ester resin in distilled water at 65℃ and 95℃, the absorption characteristics, static and dynamic mechanical properties of its carbon fiber composite were analyzed.

结合乙烯基酯树脂浇注体在65℃和95℃蒸馏水中的湿热老化行为，对其炭纤维复合材料的吸湿性、静态和动态力学性能进行了对比分析。

A salt or ester of hypochlorous acid.

碳酸二苯酯表现典型的乙烯的酯类的效应。

Precipitation of indeformable or deformable reinforcing filler into thevinyl-terminatied polydimethysiloxaneprior to or after endlinkinginto silicon networks were observed by the hydrolysis of siloxane compoundas well as the comparison between their reinforcing effects.

本文通过硅氧烷水解的途径对乙烯基封端的聚二甲基硅氧烷在交联前后导入不变形或可变形的补强填充剂的新方法进行了研究，并此较了它们的补强性能。

By desigh,the flame spreading index of the high inflaming retarding ethylene products is below 10,which meets the requirements of engineering fire resistance for safety.

通过设计，高阻燃乙烯基制品的火焰传播指数达到10以下，可以满足工程防火要求，以保证安全。

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。

Rheology modification of an ethylene/alpha-olefin interpolymer is achieved by blending the interpolymer with at least one branched polyolefm.

乙烯/α-烯烃共聚体的流变性改性是通过使此共聚体与至少一个支化的聚烯烃掺合而达成。

An adhesive composition comprises: at least one ethylene/a-olefin interpolymer, at least one tackifier; and optionally at least one additive, such as a plasticizer, wax and antioxidant.

本发明涉及一种粘合剂组合物，其包含：至少一个乙烯/α-烯烃共聚体，至少一个增粘剂；及的任选的至少一个添加剂，例如，增塑剂、蜡，及抗氧化剂。

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。