Gas Chromatography-Mass SpectrometryMass SpectrometrySpectrometry, Mass, Electrospray IonizationTandem Mass SpectrometryChromatography, LiquidChromatography, High Pressure LiquidChromatography, GasReproducibility of ResultsSolid Phase MicroextractionVolatile Organic CompoundsMetabolomicsSensitivity and SpecificityMetabolomePerianal GlandsSolid Phase ExtractionSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationVolatilizationGasesOils, VolatileReference StandardsChromatography, Thin LayerDeuteriumSubstance Abuse DetectionOcimum basilicumAndrostenediolsLimit of DetectionAcetic AnhydridesMagnetic Resonance SpectroscopyCalibrationMeconiumIonsProteomicsMolecular StructureEthylenethioureaDoping in SportsF2-IsoprostanesFatty AcidsCarboxylic AcidsBiotransformationMolecular Sequence DataCyclotronsHydroxyeicosatetraenoic AcidsProteomeOxidation-ReductionQuality ControlUrinalysisFourier AnalysisIsotope LabelingCarbohydrate SequenceAmino Acid SequencePeptidesEstersSteroidsStereoisomerismMethylationCarbohydrate ConformationWater Pollutants, ChemicalCattleLipoxygenasePolycyclic Hydrocarbons, AromaticHydrolysisChemistryAtmospheric PressureBiological MarkersTime FactorsChemical PhenomenaSpectrometry, Mass, Secondary IonChromatography, Reverse-PhaseArachidonic AcidsArachidonic AcidLiverKineticsComplex MixturesChromatography, AffinityChromatography, Ion ExchangeDinoprostIndicators and ReagentsCytochrome P-450 Enzyme SystemFatty Acids, UnsaturatedHexanesPeptide MappingCarbon IsotopesElementsProteinsBreath TestsEucommiaceaeLipid MetabolismIsotopesPeptide FragmentsSpectroscopy, Fourier Transform InfraredElectrophoresis, Gel, Two-DimensionalChromatographyPentanesEnvironmental MonitoringOligosaccharidesReference ValuesMicrochemistry8,11,14-Eicosatrienoic AcidChromatography, GelMolecular Weight