溶剂

As a designable solvent, a number of functional ionic liquids have been synthesized.

作为一种可设计的溶剂，数目繁多的新型离子液体不断涌现，然而结构性质关系暂不明确。

Objective To establish solvent desorption gas chromatographic method for determination of o-chlorostyrene in workplace air.

目的建立工作场所空气中邻氯苯乙烯的溶剂解吸气相色谱测定方法。

The method is reliable in terms of precision, accuracy, specificity, detectability, linearity and durability.

该方法简单方便，灵敏度高，重复性好，结果准确，适用于头孢西丁钠中多种有机溶剂残留量的测定与控制。

The article puts forward the detecting method of using normal butyl alcohol as outer standard substance, using PEG- 20M as fixation phaseand and hydrogen flame detecter, using methanol as solvent, detecting the content of trace MMA from composite material of artificial skull with gas phase chromatography method.

采用氢气焰离子化检测器，以正丁醇为外标物，PEG-20M为固定相，甲醇作为溶剂，气相色谱法测定复合材料人工颅骨中微量MMA的含量。

The first contract for the production of dextran was set up with the Commercial Solvents Corp.

某商业溶剂公司签订了第一份葡聚糖的的生产合同。

The other two methods can not give homogenous and diaphanous copolymer.CONCLUSION Solution bulk polymerization method is suggested.

利用溶液-本体聚合法，选择乙醇作溶剂，可以制备出均匀透明的Eudragit RS。

The recognition capability and adsorption rate of MIP can be significantly enhanced by selective modification.Separation factor could be increased from 1.60 to 3.06 after modification when naringenin was chosen as competitive molecules, and the time needed for adsorption equilibrium could be reduced from 100 min to 60 min.Within a certain range, increasing template molecule concentration or diazomethane dosage, or adopting solvent which had weaker hydrogen bond action with template molecules could all improve the modification effect.

结果表明，选择性修饰能明显提高MIP的识别能力与吸附速度，以柚皮素为竞争分子，分离因子可从修饰前的1.60提高到修饰后的3.06，吸附平衡时间从修饰前的100 min降低至修饰后的60 min；在一定范围内提高模板分子浓度，增大重氮甲烷用量，采用形成氢键能力较弱的溶剂，均能提高修饰效果。

Molecularly imprinted polymer using quercetin as template molecules, methacrylic acid as functional monomers, ethylene glycol dimethacrylate as crosslinking agent were prepared, and the binding sites of MIP were selectively modified with diazomethane.The effects of template molecule concentration, solvent and diazomethane usage on modification were discussed.

以槲皮素为模板分子，甲基丙烯酸为功能单体，乙二醇二甲基丙烯酸酯为交联剂，制备了分子印迹聚合物，并以重氮甲烷为修饰剂，对MIP的结合点进行了选择性修饰，探讨了模板分子浓度、溶剂及重氮甲烷用量等对修饰效果的影响。

After the diazotization, a mixture of 2,3,5-trichloropyridine and 3, 5- dichloropyridine-2-ketone was got as a result of Sandmeyer reaction.

收率达84.7%。接着，我们以制得的2，3，5-三氯吡啶为合成2，3-二氟-5-氯吡啶的原料，用NMP为溶剂，加入KF和CsF的混合氟化剂，高温下反应合成了2，3-二氟-5-氯吡啶。

The dual-site phase-transfer catalyst, 1,4-bisbenzene dibromide, was synthesized in toluene solution at 70℃ from p-xylylene dibromide and tributylamine.

双活性基相间转移触媒是由二溴对二甲苯与三丁胺以甲苯为溶剂在70℃下反应生成溴化1，4-二苯。

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。