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

以间硝基苯甲醛,酰酸,化试剂为原料。

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

溶解氧对异养细菌、化细菌、硝化细菌有较大影响。

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.

本文用聚二先溴代，再化的二步合成法，合成了胺基单取代聚二衍生物。

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，土壤中真菌、化细菌、反硝化细菌及一些厌气性菌的繁殖。

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化反应尾气混合洗涤后的尾气余热利用的有关计算。