Nefedipine was synthesized with m-Nitrobenzaldehyde,ethyl acetoacetate,ammonium acetate.

以间甲醛,乙酰乙酸乙酯,氨试剂为原料。

The dissolved oxygen had greater effects on heterotrophic bacteria,ammonifying bacteria and nitrifying bacteria.

溶解氧对异养、氨、有较大影响。

In this paper,W amino polyoxyalkylene were synthesized by two steps.In the first step,polyoxyalkylene were brominated.In the second,the brominated polyoxyalkylene were aminated.

本文用聚乙二先溴代，再氨的二步合成法，合成了胺单取代聚乙二衍生物。

If the wastewater concentration was too high, it would stimulate fungus, aminate bacteria, denitrifying bacteria and some anaerobic bacteria to propagate.

污水浓度过大，会刺激土壤中真、氨、反及一些厌气性的繁殖。

Some calculations are made for the utilization of waste heat in the tail gas from preneutralization,pipe reaction and secondary ammoniation sections.

介绍预中和反应的尾气与管式反应及二次氨反应尾气混合洗涤后的尾气余热利用的有关计算。