溶剂

Dichloromethane or chloroform is an appropriate solvent for the acylation reaction when the addition of a solvent is necessary in the some cases.

在需要加入溶剂的情况下，二氯甲烷或氯仿是一种合适的溶剂。

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。

Atomistic structure of the polymer membrane is generated by mapping atoms to the concentration profile of each component in the meso-scale structure through Hybrid Monte Carlo technique.

通过聚合物膜的微观结构和径向分布函数分析了溶剂在体系中的存在形式，以及溶剂对膜的微观结构的影响。

Then the epoxide of oleic acid was further oxidized and fragmented by peracetic acid to make azelaic acid. Various solvent conditions were discussed and compared.

其中分别对异丙醇、离子液体（BMIMPF6和BMIMBF4）单独作溶剂以及二者复配作溶剂的各种情况作了详细比较。

The azeotropic point of acetonitrile-water can be eliminated by ethylene glycol-CaCl_2 solvent,and relative volatility of acetonitrile to water can be increased.

乙腈是一种重要的化工原料，同时也是一种重要的有机溶剂，在溶剂回收的过程中经常遇到乙腈和水的分离问题。

Compared with the absorption positions of chlorophyll in acetone, a bathochromic shift was observed at the absorption peaks of chlorophyll in DMF and DMSO.

与叶绿素在丙酮溶剂中的光谱特性吸收峰位置相比较，叶绿素的光谱特性吸收峰在DMF与DMSO两种溶剂中显现了向红位移。

Computationalresults indicate that the no-planar trans-benzanilide is the most stable structure. The spectra indicate that the Franck Condon region photodissociation dynamics have multidimensional character withnine activemodes. The intensity of υ24 mode in methanol is much stronger than that in acetonitrile. Compared with fatty amides and benzamide, phenyl substitution for H atom on-NH2 group makes C=O solvent effects disappear.

结果表明，苯甲酰苯胺的非平面反式结构为最稳定结构；在Frank-Condon区域内，苯甲酰苯胺主要由9个活性振动模组成；其中ν24（苯环上C＝C不对称伸缩振动和CCH的面内弯曲振动，NH面内弯曲振动）振动模在甲醇溶剂中的强度远远大于其在乙腈的强度；与脂肪酰胺类化合物和苯甲酰胺的研究结果比较发现，苯基取代－NH2上的H原子使得C＝O不再具有明显的溶剂效应。

The nature of solvent use and it may be, the choice of solvent oils should be bepaid the phacolytic, the volatile and security.

溶剂油的性质视其用途不同而有别，选择溶剂油应主要考虑其溶解性、挥发性、安全性。

In this thesis betulin was purified by recrystallization with chloroform and methanol mixture, and orthogonal design had been taken to optimize the conditions of recrystallization including the volume and ratio of chloroform and methanol mixtures.

在白桦酯醇的纯化方面目前比较成熟的方法是氯仿+甲醇混合溶剂重结晶来纯化白桦酯醇，本文通过正交设计，得到最优化的溶剂比例和用量。

Result: The optimization process of extraction for Flavonoids in Bidens can be described as following: microwave power was 850 W, radiation time was 30 min, solvent concentration was 40%, solvent volume was 13 times as the proportion of raw material, and dipping time was 60 min.

结果：优选出微波辅助萃取鬼针草中总黄酮的工艺条件为：微波功率850 W，提取时间30 min，溶剂浓度40%，液固比13∶1，浸泡时间60 min；牡丹皮中丹皮酚的工艺条件为：微波功率340 W，提取时间20 min，溶剂浓度85%，液固比例为5∶1，浸泡时间30 min。

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。