title: Free-radical intermediates in the reduction of oxygen.
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004578:Electron Spin Resonance Spectroscopy; D004583:Electrons; D005609:Free Radicals; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D010100:Oxygen
chemical_list: D005609:Free Radicals; D010100:Oxygen