The influence of ambient temperature and humidity on a NIR spectroscopy analysis model was researched for xylidine content in mixed amine.

以混胺样品为研究对象，研究环境温、 湿度对混胺中二甲苯胺等成分含量近红外定量分析模型的预测能力的影响。

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Polysubstituted pyridines and 1,4-dihydropyridines were prepared in a three-component reaction of aromatic aldehyde, malononitrile and aliphatic amine in a mixed solvent of methanol and water.

在甲醇和水的混合体系中，通过芳醛，丙二腈和脂肪胺的三组分反应我们顺利得到了一系列多取代的吡啶和1，4-二氢吡啶衍生物。

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The addition of methyl amine to ethanolamine solution can significantly increase the absorption rate of CO2, and the best mixed concentration ratio of ethanolamine and methyl a-mine is 5:1.

乙醇胺溶液中添加甲基胺可明显提高CO2的吸收速率，且混合溶剂中乙醇胺与甲基胺浓度比5：1为最佳。

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