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.
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