Nitrous OxideAnesthetics, InhalationAnesthesia, InhalationNitric Oxide SynthaseIsofluraneDenitrificationXenonMethyl EthersAnesthetics, CombinedHalothaneNitric Oxide Synthase Type IIAnesthesia, GeneralPositron-Emission TomographyOxidesNitritesOtoacoustic Emissions, SpontaneousFentanylEnfluraneAnesthesia, DentalTomography, Emission-ComputedGas ScavengersNitric Oxide Synthase Type IIINitratesNitrogen OxidesAnestheticsPropofol5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseAnesthesia Recovery PeriodOxidoreductasesAnesthetics, IntravenousVehicle EmissionsNitric Oxide Synthase Type INitrificationGreenhouse EffectFluorodeoxyglucose F18AlfentanilPreanesthetic MedicationAnalgesics, Non-NarcoticRadiopharmaceuticalsOxygenAnesthesia, IntravenousNitrogenCarbon DioxideAcetyleneEthersMethaneZinc OxideTomography, Emission-Computed, Single-PhotonDose-Response Relationship, DrugThiopentalGasesAnesthesiaBrainNeuromuscular Nondepolarizing AgentsConscious SedationNitrite ReductasesAir PollutantsCerebrovascular CirculationMethoxyfluranePseudomonasTime FactorsAtmosphereIntubation, IntratrachealHypnosis, AnestheticNG-Nitroarginine Methyl EsterEuphoriaEthyl ChlorideOxidation-ReductionNitrogen CycleFluorine RadioisotopesFertilizersThiamylalMonitoring, IntraoperativeIntraoperative PeriodAtracuriumSoilEnvironmental MonitoringArginineDermatologic Surgical ProceduresSpectrometry, FluorescenceChloral HydrateAirVecuronium BromideHemodynamics