Oxygen IsotopesMeteoroidsSolar SystemIsotopesPropiolactoneNitrogen IsotopesLaboratoriesPoint-of-Care SystemsOxygenClinical Laboratory TechniquesBlood Chemical AnalysisEvolution, PlanetaryCarbon IsotopesCosmic DustEarth (Planet)Sulfur IsotopesNoble GasesMinor PlanetsTillandsiaAtmosphereNeonExtraterrestrial EnvironmentBromineIron IsotopesCarbonatesGeologic SedimentsCarbonDisease OutbreaksDeuteriumHairLeadTime FactorsReproducibility of ResultsOxygen ConsumptionRisk FactorsCarbon DioxideReactive Oxygen SpeciesPrevalenceHydrogenRetrospective StudiesSeawaterBody CompositionEcosystemWater