The results indicated that the period of nitrogen release of the coated urea was 30 days longer than that of CK under the constant temperature ( 25 ℃) during 42 days incubation .

结果表明，在 恒温条件下培养42d，包膜型 控 释 尿素在土壤中确有控制养分释放、延长供氮时间的作用，与对照相比供氮时间可延长30d以上。

At the condition of the molar ratio of urea / formaldehyde / phenol is constant the molar ratio of NaOH / P increased from o.2 to 0.53 the dry and wet strength increased 20 % and 12 % respectively .

在 尿素/甲醛/苯酚摩尔比 不变的条件下，NaOH/P的摩尔比从0.2增加到0.53，干状胶合强度和湿状胶合强度分别增加了20%和12%。

Addition of urea to the solution of β - cyclodextrin increased the polarity of β - cyclodextrin cavity and decreased the formation constant of pyrene - β - cyclodextrin inclusion complex proving that hydrophobic interaction was one of the binding forces of cyclodextrin inclusion complex .

结果表明 脲素的加入使环糊精内腔极性增大，芘-β-环糊精包络物形成 常数减小，这说明疏水相互作用是环糊精包络物形成动力之一。

The effects of urea thermal decomposition rate constant initial particle diameter and exhaust flow rate on the calculation results are examined to further verify reasonableness of the model .

分析了 尿素热解反应速率 常数、喷雾初始粒子直径、排气流速对计算结果的影响，进一步验证了文中所选模型的合理性。

Kinetics of wet flue gas desulfurization by urea is studied here based on which reaction series and reaction rate constant are defined .

通过对 尿素湿法烟气脱硫过程动力学的研究，确定其反应级数及反应速率 常数。