溶剂

In the system of A-D phenothiazine derivatives, the transition dipole moments M flu were determined mainly by direct interactions between the solvent-equilibrated fluorescence 1CT state and ground state because of their lack of significant change with increase of the solvent polarity.

在此吩噻嗪衍生物的体系里，荧光过渡态偶极矩主要由溶剂平衡的电荷转移态和基态间的作用所决定，因为它在不同极性的溶剂中缺乏明显的改变。

Thus, the photophysical properties of the polymers can be tuned by attaching different substituted side groups onto the phenylene.

溶剂的极性对聚合物溶液的光谱性能有显著的影响，溶液光谱随溶剂极性的增大逐渐向长波移动。

In the non-polar solvent, auto-sensitized photooxidation of the aminated hypocrellins is mainly involved with the singlet oxygen mechanism.

三。在非极性溶剂中，胺基衍生物的自敏光氧化主要涉及单重态氧的机制，在极性溶剂中则以超氧负离子自由基的机制为主。

In an electrolytic cell with proton exchange membrane as the diaphragm, it was found from the electrooxidation of 3-picoline at a PbO2 electrode in acetone/water mixed solvents that the current density at the same anode potential not only increases remarkably, but also the selectivity and the current efficiency of electrooxidation from 3\|picoline to nicotinic acid increase obviously compared with the pure water as the solvent.

在以质子交换膜为隔膜的电解槽内，通过3-甲基吡啶在PbO2电极上的电氧化研究，发现在丙酮-水混合溶剂中，与纯水作溶剂相比，不仅在相同阳极电位下电流密度大幅度上升， 3-甲基吡啶电氧化生成烟酸的选择性和电流效率也明显提高。

The Pictet-Spengler reaction of D-tryptophan methyl ester hydrochloride II-42 with piperonal II-34 in various solvents was extensively studied. The best stereoselectivity (cis/trans=99:1) was obtained using nitromethane or acetonitrile as the solvent.

我们研究了在不同溶剂中，D-色氨酸甲酯盐酸盐II-42和胡椒醛II-34发生的Pictet-Spengler反应的立体选择性，发现当分别用硝基甲烷和乙腈做溶剂时反应的立体选择性达到最高， cis：trans的比例为99： 1。

If crystals start to form in the pipet stop add a little more hot solvent to the solution and a drop or two hot solvent to the filtration pipet.

那就要停止过滤，把少量更加热的溶剂加到溶液中，而且向过滤移液管中加入1或2滴的热的溶剂。

objectiveto predict the promoting effect of chinese medicine on proliferation of rat bone marrow mesenchymal stem cells by bioactivity fingerprint in vitro.methodsthe ointment of plastrum testudinis was extracted by petroleum ether,ether and dichloromethane in burn to gain the extracts.the effects on the proliferation of bmmscs were examined by mtt assay and flow cytometry analysis, and each sample was studied by gc-ms.

目的运用生物活性指纹图谱预测其它中药能否促进骨髓间充质干细胞（bone marrow mesenchymal stem cells，bmmscs）。方法龟版浸膏依次用石油醚、乙醚、二氯甲烷提取，得到溶剂提取物，用mtt 比色法及流式细胞仪器研究了溶剂提取物干细胞活性，采用gc-ms 技术研究每一个提取物，根据总离子流色谱图的相同保留时间和相应峰面积，获得龟版浸膏 gc-ms 生物活性指纹图谱。

Apopicropodophyllin was used as the internal standard. The quality of Podophyllum emodi Wall.var.

色谱条件为：色谱柱，Kromasil C18柱，5μm，150×4.6mm；溶剂A，0.025mol·L〓磷酸盐缓冲溶液(pH2.5)；溶剂B，甲醇；梯度，50/50/70％B，0/13/33min；流量，0.8mL/min；进样量，6μl；检测，UV 270nm；温度，室温。

Since polar organic crystals have noncentric structures, the existence of polar axis in the crystals has a significant effect on the molecular arrangement and on the crystal growth.

极性有机晶体在不同的溶剂中具有明显不同的生长习性，主要有两个方面的原因：一是极性有机晶体属非中心对称性晶类，晶体具有极轴，极轴的存在对分子堆积和晶体生长具有重要影响；另一是极性有机晶体的界面结构不同，溶剂与晶体界面的相互作用不同，使得晶体同一面族的生长速率不同，从而导致了晶体习性的改变。

The solvent effects were investigated by means of the polarizable continuum model using THF as a solvent at B3LYP/6-31G level.

在B3LYP/6-31G水平上，以四氢呋喃为溶剂，采用可极化连续模型研究了溶剂化效应。

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。