Carbon IsotopesCarbonIsotopesIsotope LabelingOxygen IsotopesNitrogen IsotopesCarbon DioxideMethyl ChlorideAtmosphereFossilsGeologic SedimentsChemical FractionationEthylene DichloridesPaleontologyXanthobacterVolcanic EruptionsPinus taedaMethanePeptococcaceaePhotosynthesisCarbon MonoxideCarbonatesPlant LeavesCarbon CycleNanotubes, CarbonCarbon Compounds, InorganicEpitestosteronePlant TranspirationFlaveriaRhamnusEcosystemBiomassHistory, AncientMyrtusHyphomicrobiumDoping in SportsSeawaterBiodegradation, EnvironmentalNitrogenOceans and SeasWaterZinc IsotopesGas Chromatography-Mass SpectrometryPlant StomataPhosphoenolpyruvate CarboxylaseSoilRainSulfur IsotopesExtinction, BiologicalFresh WaterRibulose-Bisphosphate CarboxylaseCarbon Monoxide PoisoningDeuteriumPoaceaeTimeTreesIron IsotopesChiropteraClimateAcetatesPlantsSulfatesGeographyStrontium IsotopesCarbon TetrachlorideBacteriaAnaerobiosisCarbon SequestrationRadioisotope Dilution TechniqueCarbon DisulfideSeasonsDietCarbon RadioisotopesModels, BiologicalMass SpectrometryBiological EvolutionPhylogenyCarbon Tetrachloride PoisoningKineticsIndicator Dilution TechniquesHydrogenCarbon FootprintOxidation-ReductionMercury IsotopesDeuterium OxideEvolution, PlanetaryHydrogen-Ion ConcentrationOxygenRadioisotopesMeteoroidsMagnetic Resonance SpectroscopyGlucoseGeological PhenomenaSootCarboxyhemoglobinCatalysisChromatography, Liquid