In other words, the concentration of at any time is given by the initial concentration, t minus the rate constant times time.
换句话说，任意时刻A物质的浓度等于初始浓度，减去常数乘以时间。
Rate constant (K) of degradation increases with increasing the gas flow rate or decreasing the initial sodium lignosulfonate concentration.
气体流量越大，木质素磺酸钠的初始浓度越低，速率常数K越大，降解效果越好。
The tests showed that the rate constant value increased with the dipped temperature raise and the increment of the DEHA's initial concentration in the PVC film.
实验结果表明：速度常数随浸泡温度的上升和PVC膜中DEHA的起始浓度的提高而增加。
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