Carbon IsotopesCarbonOxygenIsotopesOxygen IsotopesIsotope LabelingCarbon DioxideNitrogen IsotopesMethyl ChlorideAtmosphereGeologic SedimentsFossilsOxygen ConsumptionChemical FractionationPaleontologyEthylene DichloridesPhotosynthesisVolcanic EruptionsMethaneXanthobacterPinus taedaReactive Oxygen SpeciesCarbon MonoxidePlant LeavesPeptococcaceaeCarbonatesCarbon CycleBody CompositionNanotubes, CarbonCarbon Compounds, InorganicEcosystemEpitestosteronePlant TranspirationFlaveriaRhamnusBiomassHistory, AncientMyrtusHyphomicrobiumNitrogenWaterSeawaterDoping in SportsBiodegradation, EnvironmentalGas Chromatography-Mass SpectrometryOceans and SeasSoilZinc IsotopesFresh WaterPlant StomataRainPhosphoenolpyruvate CarboxylaseSulfur IsotopesTreesPoaceaeDeuteriumExtinction, BiologicalCarbon Monoxide PoisoningRibulose-Bisphosphate CarboxylaseTimeOxygen Inhalation TherapyAcetatesBacteriaClimateIron IsotopesChiropteraAnaerobiosisPlantsSinglet OxygenSulfatesDietModels, BiologicalGeographyOxidation-ReductionFatty AcidsKineticsPhylogenyStrontium IsotopesCarbon TetrachlorideSeasonsMass SpectrometryAmino AcidsRadioisotope Dilution TechniqueCarbon SequestrationCarbon DisulfideCarbon RadioisotopesMolecular Sequence DataBiological EvolutionHydrogen-Ion ConcentrationPartial PressureTime FactorsPhospholipidsIndicator Dilution TechniquesBase CompositionTemperatureGlucoseHyperbaric OxygenationHydrogenEnergy MetabolismCarbon Tetrachloride Poisoning