General Considerations • Requires oxygen • Auto-oxidation or Enzyme catalyzed • Catalyzed by trace metals (fe, Cu, Co.) and Heme compounds • Catalyzed by light (UV) and irradiationGeneral Considerations • Requires oxygen • Auto-oxidation or Enzyme catalyzed • Catalyzed by trace metals (fe, Cu, Co.) and Heme compounds • Catalyzed by light (UV) and irradiation