乙烯的

Octylene was synthesized via tetramerization of ethylene at the presence of a catalyst system consisted of chromium acaet as primary catalyst, methylaluminoxane as cocatalyst, bis amine as ligand under high pressure. The effects of different PNP ligands on catalyst activity and selectivity to 1-octene were investigated.

在乙酰丙酮铬、甲基铝氧烷、配体三元催化体系中，以乙烯为原料在高压下齐聚生成1-辛烯，主要考察N原子上取代基不同的PNP配体对催化剂活性及1-辛烯选择性的影响。

1DF-1 are oilless lubricating materials. Their surface layer is modified tefolon plastics. They may be operated in non-lubrication applications.

DF-1复合材料的表面摩擦层为改性聚四氟乙烯，是一种无油润滑材料，可在干摩擦条件下进行工作，而在有油润滑的条件下进行工作，其寿命会成倍甚至几十倍地提高。

In this article, star-high vinyl content polybutadiene was prepared using a multi-functional organolithium anionic initiator by " one-step " process. On the basis of 250ml glassware experiment ,we improved the experiment in 2L metal kettle. The polymerization condition was got as follows: polymerization temperature : 50-60 ℃, monomer content : 8-llg/100ml, polymerization time : 3~4 hours.Chracterizations were carried out by 'H-NMR, IR and GPC.

本文首次采用多官能团有机锂引发剂一步法合成出了星型高乙烯基聚丁二烯，在250ml玻璃瓶的基础上，进行2L金属斧的扩大实验，确定了以下聚合工艺参数：聚合反应温度：50～60℃，单体浓度：8～11g／100ml，聚合反应时间：3～4小时。

Objective: To investigate the feasibility of swelling hydrogel instead of polyethylene oxide as swelling polymer in push-layer of push-pull osmotically controlled-release tablets.

中文摘要：目的：考察常用亲水膨胀材料替代聚氧乙烯作为推动层的膨胀推动剂用于制备推拉型渗透泵控释片的可行性。

The adsorption results of triethylene tetraamine-modified oxycellulose showed that:(1) when adsorption tests were carried at 37℃and pH7 in 5 h,static adsorption capacity of 0.5g adsorbent for urea(6g/L in dialysis solution),uric acid(1 g/L in redistilled water) and creatinine(0.1 g/L in dialysis solution) were 131.5mg/g,24.6mg/g,3.31mg/g respectively.

三乙烯基四胺基氧化纤维素的吸附性能结果表明：(1)吸附温度为37℃，pH值为7时，0.5g吸附剂对于尿素(6g/L透析液)、尿酸(1g/L二次水)、肌酐(0.1g/L透析液)在5h的静态吸附容量分别为131.5mg/g、24.6mg/g、3.31mg/g。

Our results indicate that biosynthesis of UDP-sugars that are precursors of pectic polymers is important for cotton fiber elongation.

综合分析表明，果胶前体核苷糖的生物合成对棉纤维细伸长非常重要，并且受乙烯信号的调控。

Used the PERCA method union tubular mobile technology basically to determine the free radical production of the ozone ethene reaction, the result has been consistent with the literature value.

采用PERCA方法结合管式流动技术测定了臭氧乙烯反应生成的自由基的产率，结果与文献值基本一致。

PVDF D-1 is a powder form of polyvinylidene fluoride, which can be well

PVDF D-1 是一种粉末状的聚偏氟乙烯产品，在一些溶剂中具有良好的溶解

Polyvinylidene Fluoride PVDF homopolymer conforming to ASTM D-3222, Type I, Grade 2, is a tough, abrasion-resistant fluorocarbon material that has a design stress of 1,360 psi at 73°F and a maximum service temperature of 280°F.

聚偏二氟乙烯PVDF均聚物，符合ASTM D-3222，类别1，等级2标准，是一种坚固的、耐磨的碳氟化合物材料，在22oC下，其设计应力为1，360 psi，最高工作温度达到137oC。

The resin is prepared by swelling chlorine balls in a solvent such as nitrobenzene; adding catalyst to obtain polystyrene-divinylbenzene adsorptive resin; removing reaction mother solution; washing to remove residual solvent and catalyst; swelling; adding pyrane reagent to further react with chloromethyl residual on inner and outer surfaces of the resin to obtain the pyranyl modified adsorptive resin with the composite function.

该树脂的制备方法：将氯球溶胀于硝基苯等溶剂中，加入催化剂，得到聚苯乙烯-二乙烯苯吸附树脂；抽尽反应母液，洗去残留的溶剂和催化剂；溶胀，加入吡喃试剂与树脂内外表面残留氯甲基进一步反应，可制得吡喃基修饰复合功能吸附树脂。

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。