RadioisotopesIsotopesHydrogenDeuteriumMethanobacteriumIsotope LabelingHydrogen BondingOxygenHydrogen PeroxideCatalysisOxygen IsotopesNitrogen IsotopesHydrogen SulfideCarbon IsotopesReactive Oxygen SpeciesOxygen ConsumptionZinc IsotopesSulfur IsotopesIron IsotopesOxidation-ReductionStrontium IsotopesKineticsRadioisotope Dilution TechniqueMass SpectrometryHydrogen CyanideModels, MolecularCatalaseSinglet OxygenDeuterium Exchange MeasurementOxidantsOxygen Inhalation TherapyWaterHydrogen-Ion ConcentrationModels, ChemicalIndicator Dilution TechniquesDeuterium OxideMagnetic Resonance Spectroscopy