title: Formation of .OH and .H in aqueous solutions by ultrasound using clinical equipment.
abstract: Hydroxyl radicals and hydrogen atoms were produced in argon-saturated aqueous solutions exposed to ultrasound using clinical dental equipment. .OH and .H radicals were detected and identified by ESR and were spin trapped with 5,5-dimethyl-1-delta-pyrroline-N-oxide (DMPO) and alpha-4-pyridyl-1-oxide-N-tert-butylnitrone (POBN). The observed ESR spectra were compared with those obtained from sonolysis of argon-saturated water in an ultrasonic bath, from gamma radiolysis of air-saturated water, and from uv photolysis of aqueous hydrogen peroxide solutions.
mesh_terms: D001128:Argon / Q000494:pharmacology; D003748:Dental Equipment; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D006859:Hydrogen / Q000528:radiation effects*; D012996:Solutions; D014465:Ultrasonics
chemical_list: D005609:Free Radicals; D012996:Solutions; D001128:Argon; D006859:Hydrogen