Free RadicalsAntioxidantsFree Radical ScavengersHydroxyl RadicalPicratesOxidative StressLipid PeroxidationSuperoxide DismutaseElectron Spin Resonance SpectroscopyAscorbic AcidReactive Oxygen SpeciesOxidation-ReductionCatalasePlant ExtractsHydrogen PeroxideVitamin EGlutathioneMalondialdehydeGlutathione PeroxidaseBiphenyl CompoundsHydroxidesNitrogen OxidesPhenolsLipid PeroxidesThiobarbituric Acid Reactive SubstancesSuperoxidesCyclic N-OxidesOxidantsXanthine OxidaseSpin LabelsOxygenSulfonic AcidsSpin TrappingAcetylcysteinealpha-TocopherolRats, WistarFlavonoidsBenzothiazolesPolyphenolsAmidinesPeroxidesButylated HydroxytolueneDeferoxamineAntipyrineIronGlutathione Reductasebeta CaroteneTioproninNF-E2-Related Factor 2CarotenoidsPeroxidasesProstatectomyNitric OxideSulfhydryl CompoundsProtein CarbonylationRutinRats, Sprague-DawleyTime FactorsPlant BarkKineticsDose-Response Relationship, DrugChromatography, High Pressure LiquidPhytotherapyCells, CulturedXanthineMolecular StructureMitochondriaCopperQuercetinDNA DamageHydroxybenzoatesCell Survivaltert-ButylhydroperoxideChromansGlutathione DisulfideThioctic AcidButylated HydroxyanisolePlant LeavesReactive Nitrogen SpeciesLiverCatechinThiobarbituratesDietary SupplementsTanninsFruitAllopurinolDeoxyguanosineAldehydesRadiation-Protective AgentsPeroxidaseF2-IsoprostanesPulse RadiolysisApoptosisLuminescent MeasurementsPlants, MedicinalGallic AcidRibonucleotide ReductasesIron Chelating AgentsHydrazinesUbiquinone