2co

The results show that in this simple system , the conditions can be well controlled , and the productivity can be increased when increasing the ratio of ( NH2 ) 2CO or reaction time .

结果表明，本方法体系简单，条件易于控制，且随尿素比例的增加、反应时间的延长，晶须的产率得以提高。

After urea applied into soil 5 days , amide nitrogen in soil of ( NH2 ) 2CO treatment was 2.78 mg / Kg , this indicated that a majority of urea had been inverted to ammonium nitrogen .

尿素处理的土壤中酰胺态氮含量为2.78mg／Kg，这说明施入土壤5天后大部分尿素已转化为铵态氮。

Al ( NO3 ) 3 Zr ( NO3 ) 3 and ( NH2 ) 2CO being used as material in the article , rare earth Zr Catalyst whose carrier was powder Al2O3 was gotten by co-precipitation and was used in the stage of Catalytic transformation in waste plastics cracking .

本文以硝酸铝、硝酸锆和尿素为原料，用共沉淀制取以超细氧化铝为载体的稀土锆催化剂，并将该催化剂应用于废塑料裂解的催化改质阶段。