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

溶解氧对异养菌、氨菌、菌有较大影响。

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

以间基苯甲醛,乙酰乙酸乙酯,氨试剂为原料。

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

介绍预中和反的尾气与管式反及二次氨反尾气混合洗涤后的尾气余热利用的有关。

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

水浓度过大，会刺激土壤中真菌、氨菌、反菌及一些厌气性菌的繁殖。

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.

本文用聚乙二醇先溴代，再氨的二步合成法，合成了胺基单取代聚乙二醇衍生物。