二聚

Molecular dynamics simulations of NPT (constant pressure and constant temperature) dynamics are carried out to obtain specific volume as a function of temperature for polyethylene , polypropylene , poly-isobutylene , polyoxymethylene , and polydimethylsiloxane .

用NPT分子动力学模拟来获得聚乙烯、聚丙烯、聚异丁烯、聚甲醛和聚二甲基硅氧烷在不同温度下的特征体积。体积玻璃化转变温度通过对模拟得到的V-T作图的曲线的拐点决定。

The different hexanedichloromethane volumn ratio effection on molecular weight of,molecular weight distribution and weight percent of lowmolecule of polyisobutene by boron trifluoride initiator was studied in this paper by IR and UV.

研究了正己烷—二氯甲烷溶剂配比对BF3引发体系的聚异丁烯分子量及分子量分布、低分子物含量的影响，给出了BF3引发体系聚异丁烯及AlCl3引发体系聚异丁烯的红外光谱及紫外光谱。

Melamine and its analogues - cyanuric acid, ammelide and ammeline - are assumed to be of equal potency and are referred to collectively below as melamine-analogues.

三聚氰胺和它的类似物－尿氰酸、酰胺、三聚氰酸二酰胺－被假定为具有同等效力，以下统称为三聚氰胺类似物。

The cure reactions of ternarysystem containing poly, poly and HDI isocyanurate, and the effect of the ratio ofPGA/POH on the thermal, mechanical and surface properties of curedresin have also been examined.

本文还研究了聚丙烯酸环氧丙酯、聚丙烯酸羟丙酯和六亚甲基二异氰酸酯三聚体的反应及三元反应体系中PGA／POH的不同比例对交联后树脂的热性能、力学性能及表面性能的影响。

The initial three chapters of this dissertation aim to improve the regularity of ladderlike polysiloxane through strong H-bonding template and slowly dropping half water for hydrolysis and condensation.

本论文前三章旨在利用强氢键模板作用和半水量水解同步缩合脱氯化氢的改进方法首次合成了(1)高规整性、可溶的反应性含对苯二胺有机桥基的聚氢基硅氧烷高分子，29Si-NMR 图中显示梯形主链上硅原子-Si(HO2/2峰的基线宽度△1.0 ppm，这是至今文献报道的所有梯形聚硅氧烷规整性最好的数据；采用分段去撑法成功的合成了纯无机梯形聚氢基硅氧(来源：1bABC论文网www.abclunwen.com)烷。

Purified GO had a molecular weight between 145, 000 and 162, 300, as determined by Sephadex G-200 filtration and SDS-PAGE of the enzyme as cross-linked with glutaraldehyde. This result showed that the holoenzyme was a tetramer, and no change occurred in molecular weight of the enzyme during the s〓orage. The active form of GO from brassica leaves showed a constant molecular weight during purification, so did that from O. sativa leaves during greening of etiolated seedlings, maybe acting as a stable tetramer.

用Sephadex G-200胶过滤和戊二醛交联后的SDS-PAGE法测得纯化的菜心叶片GO的分子量在145，000-162，300间，为四聚体；并且在放置过程中其分子量和聚合态均保持不变，为稳定的四聚体；进一步研究表明菜心叶片GO在纯化过程中和水稻叶片GO在黄化苗的转绿过程中，两种GO活性状态的分子量和聚合态也没有发生变化，均呈四聚体。

The influence factors on decomposition efficiency, such as digestion time and pH were identified. It was shown that non-condensed phosphate could be decomposed completely by persulphate.

结果表明：在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The influence factors on decomposition efficiency, such as digestion time and pH were identified. It was shown that non-condensed phosphate could be decomposed completely by persulphate. But in alkali condition, condensed phosphate can only be decomposed partly.

结果表明：在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The influence factors on decomposition efficency, such as digestion time and pH were identified. It was shown that noncondition phosphate could be decomposed completely by persulphate. But in alkali condition, condensed phosphate could only be decomposed partly.

结果表明，在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

Results:The cell aggregations had differences in shape as well as size, flavone content, enzyme activities, growth speed and so forth. The flavone content of the smallest cell aggregation was approximately twice compared to the larger ones, and its malonaldehyde content, the phenylalanine ammonialyase and peroxide enzyme activities and recultivate curve presented the same change tendency.

结果：不同的细胞聚集体在形态大小、黄酮含量、酶的活性、生长速度等方面均存在着差异，其中颗粒最小的细胞聚集体黄酮含量约为颗粒较大的细胞聚集体的2倍，并且其丙二醛含量、苯丙氨酸解氨酶及过氧化物酶的活性及再培养曲线均具有相同的变化趋势。

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。