Isotope LabelingIsotopesNitrogen IsotopesOxygen IsotopesCarbon IsotopesHydrogenHydrogen BondingCell NucleusHydrogen PeroxideZinc IsotopesSulfur IsotopesDeuteriumIron IsotopesHydrogen SulfideStrontium IsotopesRadioisotope Dilution TechniqueMass SpectrometryKineticsIndicator Dilution TechniquesNucleus AccumbensCarbon RadioisotopesRadioisotopesGas Chromatography-Mass SpectrometryThalamic NucleiDeuterium OxideOxidation-ReductionSolitary NucleusMercury IsotopesEvolution, PlanetaryCochlear NucleusRaphe NucleiTritiumWaterModels, ChemicalCerebellar NucleiCaudate NucleusCatalysisActive Transport, Cell NucleusMolecular Sequence DataSeptal NucleiParaventricular Hypothalamic NucleusCarbonArcuate NucleusDeuterium Exchange MeasurementHydrogen-Ion ConcentrationModels, MolecularChromatography, LiquidMagnetic Resonance SpectroscopyTime FactorsGeologic SedimentsRadiopharmaceuticalsModels, BiologicalZinc RadioisotopesMethaneIntestinal AbsorptionMeteoroidsTrigeminal NucleiRats, Sprague-DawleyRed NucleusAmino Acid SequenceCarbon DioxideGeological PhenomenaSuprachiasmatic NucleusProtonsTandem Mass SpectrometryAtmosphereNitrogenMolecular StructureRadiometric DatingSulfidesAmino AcidsHydrogen CyanideHorseradish PeroxidaseNeuronsProteomicsSubthalamic Nucleus