二聚

By the cultivation of Hevea brasiliensis in Brazil, harvesting of the latex obtained, the basic chemical composition of cis - polyisoprene.

由种植的巴西三叶橡胶树割取的胶乳制得，基本化学成分为顺－聚异戊二烯。

Our main products: low-voltage high-blown film, polypropylene blown film machine, since the convex deduction bag blown film machine, two of the three-tier co-extruded film production lines and all kinds of shrinking film-blown film and all kinds of bag -, Two products are included in the 1996 and 2001 in Zhejiang Province Office of Science and Technology Industrial new product projects.

我司主要产品有：高低压吹膜机、聚丙稀吹膜机、凹凸自扣袋吹膜机，二三层共挤复合薄膜生产线和各种热收缩膜吹膜机及各类制袋机，其中两项产品分别列入1996年和2001年浙江省科技厅工业新产品项目。

They were both easily to be dissolved in dilute alkali. When the pH gradually increases, the ring-opening speed of the derivative is higher than that of GB. The derivative was obviously affected by solvent and higher temperatures. When GB was dissolved in PEG, the peak of the derivative disappeared at 50 ℃ for 15 h or at 120 ℃ for 4 h. Besides the main peak of GB, there appeared a small peak with a retention time of 1.2-3.0 min after heating 4 h at 120 ℃. The result showed that the derivative was in a high energy state, and GB had a better stabilization.

溶剂和温度的综合作用对衍生物的稳定性影响更加显著，GB在聚乙二醇溶液中分别于50 ℃下保存15 h和120 ℃下保存4 h后其中的衍生物峰全部消失；将该溶液于120 ℃下保存4 h后分析，除有主峰GB外，在保留时间为1.2～3.0 min范围还伴随有小峰出现，这说明衍生物处于高能态，GB相对较为稳定，两者共存，且相互转化；在特定条件下衍生物能全部转化为GB。

In this research, the above three methods were improved and employed in the analysis of pegylated hirudin, and proved to be more accurate.

但由于聚乙二醇修饰的蛋白质的物理化学性质的改变，这些方法都不能取得理想的结果。

Methods:The target compounds were synthesized from acylation of polyethylene glycol to hydroxy group of ursolic acid by polymer polycondensation method.

通过高分子缩合的方法，将酰化的聚乙二醇接枝到熊果酸的羟基上，得到目标产物。

The stability and hygroscopicity of the electrolyte film and its conductivity changing with its constitution and temperature have been studied in the paper.

本文采用聚乙二醇和环氧树脂／三乙烯四胺凝胶组成互穿聚合物网络，制备了IPN——ZnCl2高分子固体电解质膜，讨论了IPN的成因和电解质膜的电导率随组成、温度的变化及其膜稳定性和吸水性。

From the 2D image we can see that the coagulation and sublimation are the main processes for ice crystal growing.

3二维图像分析表明，聚并和凝华过程是冰晶增长的主要过程。

Usually in China it is used in combination with pegylated interferon.

在中国，它通常与聚乙二醇干扰素联合应用。

A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more aluminum containing cocatalysts; a selectivity control agent comprising at least one silicon containing compound containing at least one C1-10 alkoxy group bonded to a silicon atom, and one or more activity limiting agent compounds comprising one or more aliphatic or cycloaliphatic carboxylic acids; alkyl-, cycloalkyl- or alkyl-ester derivatives thereof; or inertly substituted derivatives of the foregoing.

一种用于丙烯聚合的催化剂组合物，所述催化剂组合物包括：一种或多种齐格勒-纳塔主催化剂组合物，该主催化剂组合物包括一种或多种过渡金属化合物和一种或多种芳族二羧酸酯内部电子给体；一种或多种包含铝的助催化剂；选择性控制剂，该选择性控制剂包括至少一种包含硅的化合物，该化合物包括至少一种与硅原子连接的C 1-10 烷氧基；和一种或多种活性限制剂化合物，该活性限制剂包括一种或多种脂族或脂环族的单或聚羧酸类、其烷基-、环烷基-或烷基-衍生物、或上述惰性取代的衍生物。

The experimental group was given an operation of cutting infundibulum and the contol group was given an exposure of not cutting the infundibulum.Both groups were raised under similar condition.After surviving for 30 days,the animals were killed and specimens from aorta were taken and observed under light and electron microscope.

实验组行手术切断漏斗，对照组行手术暴露但不切断漏斗，手术后2d，两组动物移至同一条件下饲养，存活30d后用1%多聚甲醛+1.25%戊二醛液从心脏灌流固定，取主动脉作光、电镜观察。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。