四代的

For example, there is only local cooperative organization between polymer segments of atactic poly in the middle-sized solvent poly with molecular weight 200g/mol (PEG200). But for the stereo-regular isotactic polystyrene, pronounced content of 3〓 helix can be found in its middle-sized solvents.

例如，无规聚甲基丙烯酸甲酯在聚乙二醇（分子量为400）中分子溶剂中表现为链段的局部协同组织，而等规聚苯乙烯在邻苯二甲酸二辛酯、氯代十四烷等中分子溶剂中则出现相当含量的3〓螺旋构象。

One, what about the analysis of economy of balata farm agriculture Hainan farming cultivate passes 3 acting people more than 40 years is difficult do poineering work, already developed construction.

一、关于橡胶农场农业经济的分析海南农垦经过三代人四十多年的艰苦创业，已开发建设。。。

The second part is about that five-membered rings compounds were synthesised using aromatic aldehyde,α-bromoketone and imine ester in the present of zinc power.

2以芳香醛，α-溴代苯乙酮与氨基酸酯亚胺类化合物在金属锌粉的作用下，生成一系列的四氢吡咯化合物。

A method to measure the content of nickel in the nickel iso - caprylate by complexometric titration using ethylenediamine tetraacetic acid was set up.

以乙二胺四乙酸或柠檬酸作配位剂，在无氰的硫代硫酸盐–亚硫酸盐体系中研究了金在镀镍铜基底上的电沉积。

The acquisition will increase El Paso Pipeline Partners' interest in CIG to 40 percent and its interest in SNG to 25 percent.

此次收购将增加埃尔帕索管道合作伙伴的兴趣通讯以百分之四十和代用天然气的兴趣，以百分之二十五。

Benzimidazoline as a new tetrahydrofolate coenzyme model to perpare alkali can bring a byproduct N, N\'-dimethylaniline, this byproduct can be recycled to produce benzimidazoline as raw materials.

这种新的仿生合成方法，以羧酸和卤代物为起始原料制备四氢-β-咔啉类化合物，可为工业生产β-咔啉类生物碱提供更为方便的条件。

Formylation and diformylation of dithieno [2,3-b:3',2'-d] thiophene were prepared by two methods. Firstly, aromatic carbanions were prepared by 1 Br/Li exchange of bromo dithieno[2,3-b:3',2'-d]thiophene with n-BuLi in THF at low temperature; 2 deprotonation of dithieno[2,3-b:3',2'-d]thiophene with LDA.

二噻吩并[2，3-b：3'，2'-d]噻吩单醛与双醛的制备首先通过两种方法产生芳基负离子：1溴代并三噻吩在四氢呋喃中与正丁基锂发生的溴锂交换；2用LDA对二噻吩并[2，3-b：3'，2'-d]噻吩去质子化作用。

The compositions can also contain microcrystalline cellulose, croscarmellose sodium, anhydrous lactose, magnesium stearate, micronized edetate calcium disodium hydrous, and micronized sodium thiosulfate pentahydrate.

所述组合物也可以包含微晶纤维素、交联羧甲纤维素钠、无水乳糖、硬脂酸镁、微粒化的含水乙二胺四乙酸钙二钠和微粒化的硫代硫酸钠五水合物。

In the present study, the autotetraploid rice IR36-4X was treated with ion implantation technique by nitrogen ion beams and a polyembryonic seedling mutant (named as the IR36-Shuang) was identified in M2 generation. The mutant line was systematically investigated about the location of seedling in polyembryonic seedling, and the cytological initiation of the additional embryo in the 1R36-Shuang was observed and determined.

以低能氮离子束为诱变源，通过对同源四倍体水稻品系&IR36-4X&进行离子注入后在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双），对该突变株后代的多胚苗形态特征及其多胚来源进行了研究。

Pyromellitic dianhydride and Sodium tetrazodiphenyl-naphthionate, 1,4-diaminoanthraquinone and Benzoguanamine as aromatic diamines were selected to be polymerized under microwave irradiation.

本论文选用均苯四酸二酐和刚果红、1，4—二氨基蒽醌、苯代三聚氰胺三种芳香族二胺作为单体，采用微波辐射的方法合成了具有非线性光学性能的聚酰胺酸和聚酰亚胺。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。