unclassified drug article 70 aqueous solution 62 priority journal 36 Solutions 32 controlled study 28 nonhuman 26 pH 26 Kinetics 20 Oxidation-Reduction 18 chemical reaction 18 Hydrogen-Ion Concentration 16 chemistry 16 nitrogen 14 proton transport 14 structure analysis 14 Adsorption 12 Animals 12 Nitrogen Oxides 12 Water 12 adsorption 12 calculation 12 chemical structure 12 complex formation 12 decomposition 12 kinetics 12 nitric oxide 12 oxidation reduction reaction 12 photochemistry 12 reaction analysis 12