hydrogen ion concentration

PH value: Self defines the negative logarithm being hydrogen ion concentration.

PH值: 本身定义是氢离子浓度的负对数.

from the results obtained, it seemed likely that the hyperpnea induced by intravenous injection of ammonium chloride was duo to direct excitation of the respiratory center by increase in hydrogen ion concentration of the blood, and that the peripheral chemoreceptors played no significant role in this effect.

氯化铵所致的呼吸增强，可能主要是由于血浆中氢离子增加对呼吸中枢的直接刺激作用，外周化学感受器在这方面不起重大作用。

Data of decrepitation temperature and homogenization temperature of main mineral inclusions and of chemical compositions the salinity, and hydrogen ion concentration ( pH value) of the ore& forming fluid of gold deposits from volcanic terrain in Zhejiang are given in this thesis.

论文给出浙江火山岩区金矿床主要矿物包裹体的爆裂温度、均化温度以及成矿流体的化学成分、盐度和氢离子浓度（pH值）资料。