乙烯的

The protic- or Lewis acid catalyzed ring-closure of divinyl ketones (and their acid-labile precursors) pentadienylic cations is known as the via Nazarov cyclization.

质子酸或路易斯酸通过戊二烯基阳离子催化二乙烯酮的环闭合（以及它们的酸不稳定前体）这个反应被称为Nazarov环化。

The title nano-sized polymeric microgels were synthesized by emulsion polymerization method,using divinyl benzene as crosslinking agent and methyl methacrylate,hydroxyl ethyl methacrylate,butyl acrylate as monomers.

通过乳液聚合的方法，以二乙烯基苯为交联剂，用甲基丙烯酸甲酯、甲基丙烯酸-β-羟乙酯、丙烯酸丁酯等丙烯酸酯类单体合成纳米尺寸的聚合物微凝胶粒子。

Regular vinyl addition polymers may be obtained from particularly strained endocyclic double bonds.

由带特殊张力的桥环双键可以得到规整的乙烯类加成聚合物。

More and more attention has been paid to the preparation of SAP by grafting the ethylenic unsaturated monomers onto polysaccharides in order to decrease the environment pollutions.

为减少随之而来的环境污染，多糖与乙烯基类不饱和单体接枝共聚制备SAP引起了学术界的极大关注。

This paper studied on the conditions of the SAP preparation by grafting the ethylenic unsaturated monomers onto the polysaccharides of konjac flour. In addition , the structure and the biodegradable property of the SAP were tested .

本文研究了魔芋多糖和乙烯基类不饱和单体接枝共聚制备SAP的条件，并对该接枝共聚物的结构和生物降解性能进行了研究和分析。

The analysis shows that, the larger the mol value of ethylic sequence in high molecule chains, the higher the low-temperature viscosity, the worse the low-temperature starting performance and pumpability.

通过分析得出：随着高分子链中丙基序列所占摩尔分数的增大，低温粘度变大，低温启动和泵送性能变差；而随着乙烯基含量的增加，低温粘度下降，低温性能变好。

The Stille coupling reaction between 8 iodo 9 benzyl 9H purine and RSnBu 3 (R=vinyl,2 thienyl,2 furyl,phenylethynyl and phenyl) was studied using (Ph 3P) 2PdCl 2 as catalyst and DMF as solvent.

采用 (Ph3 P) 2 PdCl2 为催化剂，DMF为溶剂，对 8 碘 9 苄基 9H 嘌呤与有机锡试剂RSnBu3 (R=乙烯基、2 噻吩基、2 呋喃基、苯乙炔基和苯基等)之间的 Stille偶合反应进行了研究，合成出了5种 8位取代的嘌呤衍生物。

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。

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。

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。

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。