RadioisotopesIsotopesHydrogenDeuteriumMethanobacteriumIsotope LabelingCatalysisNitrogen IsotopesOxygen IsotopesCarbon IsotopesHydrogen BondingHydrogen PeroxideRadiation DosageRadiation, IonizingRadiation InjuriesHydrogen SulfideZinc IsotopesDose-Response Relationship, RadiationSulfur IsotopesRadiation ToleranceRadiationRadiation MonitoringRadiation ProtectionIron IsotopesStrontium IsotopesRadiation OncologyRadioisotope Dilution TechniqueMass SpectrometryCosmic RadiationRadiation Injuries, ExperimentalKineticsRadiation PneumonitisGamma RaysIndicator Dilution TechniquesNeoplasms, Radiation-InducedBackground Radiation