Hydrogen-Ion Concentration article 320 pH 282 nonhuman 174 Kinetics 136 priority journal 130 chemistry 110 Animals 104 metabolism 104 controlled study 86 Temperature 84 unclassified drug 84 Animal 78 kinetics 64 Support, Non-U.S. Gov't 62 animal 62 Water 56 Rats 54 enzymology 54 rat 54 animal experiment 50 water 46 Liver 42 Male 42 molecular dynamics 42 temperature 42 in vitro study 40 Article 38 Oxidation-Reduction 36 animal cell 34