体积比浓度

泥砂沉降速度w，对龙头内部体积比浓度有显著影响。

Sediment settling velocity ( wS ) has pronounced effect on the concentration ( Cv ) in the body of debris flow head .

气体的体积比浓度和摩尔比浓度

Volume Specific Concentration and Mole Specific Concentration of Gas

氨-甲醇溶液的浓度宜控制在15%（摩尔分数）左右；气体的体积比浓度和摩尔比浓度

Concentration of ammonia-methanol solution 15 % ( mol ); Volume Specific Concentration and Mole Specific Concentration of Gas

采用标准臭氧发生器标定的结果显示，在0￣50×10-9（体积比）的浓度范围内，化学发光的光子计数值与臭氧浓度之间的线性关系很好。

Calibrations showed good linear relationship between photon counts of PMT and concentration of ozone generated by standard ozone calibrator , up to 50 ppb ( parts per billion by volume ) .

本文以中性蛋白酶为对象，研究了水相pH值，离子强度、油水相体积比和酶液浓度等因素对反胶团萃取酶的影响。结果萃取率可达40%。

The extraction of neutral proteinase by using a reversed micellar pHase to transport the enzyme from one aqueous aqueous to another , has been studied .