TritiumFood Contamination, RadioactiveTamaricaceaeIsotope LabelingRadioactive PollutantsHydrologyBorohydridesRadioisotope Dilution TechniqueWater Pollution, RadioactiveWater Pollutants, RadioactiveNorepinephrineNuclear Power PlantsVas DeferensDeuteriumSoil Pollutants, RadioactiveScintillation CountingKineticsAutoradiographyCarbon RadioisotopesElectric StimulationChromatography, Thin LayerNuclear ReactorsGroundwaterCholestanesYohimbineStereoisomerismKetosteroidsCrotonatesMethodsAutoreceptorsPropionibacteriumBeta ParticlesReceptors, Adrenergic, alphaUracilThymidinePhenoxybenzamineNicardipineBody Fluid CompartmentsDiltiazemReceptors, Adrenergic, alpha-2Body WaterDesipramineAdrenergic alpha-AntagonistsAdrenergic FibersCobalt RadioisotopesReceptors, AdrenergicLiverChemistryOxygen IsotopesChemical PhenomenaPoly URats, Inbred StrainsEnvironmental MonitoringGuinea PigsOxidation-ReductionMolecular Sequence DataTime FactorsSaphenous VeinTetrodotoxinBinding SitesMass SpectrometryClonidineWaterPyridoxal PhosphateEscherichia coliMuscle ContractionNeurotransmitter AgentsChromatographySteroid HydroxylasesRNA, TransferPhentolamineHistidineMathematicsChromatography, High Pressure LiquidSympathetic Nervous SystemNerve EndingsEnvironmental ExposureHydrogen-Ion ConcentrationHydrogenRats, WistarRabbitsNifedipineDNACocaineTissue DistributionCarbon IsotopesThymidylate SynthaseVerapamilCerebral CortexAcetylcholineSubstrate SpecificityDose-Response Relationship, Drug