Health ResortsOxidation-ReductionElectrodesOxygenElectrodes, ImplantedOxygen ConsumptionReactive Oxygen SpeciesIon-Selective ElectrodesElectrochemistryElectrochemical TechniquesSinglet OxygenOxygen Inhalation TherapyMicroelectrodesHydrogen PeroxidePotentiometryGraphiteKineticsFluorocarbon PolymersBiosensing TechniquesEquipment DesignHydrogen-Ion ConcentrationOxidative StressCarbon Compounds, InorganicOxygen Isotopes