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# Formation of ${}^{\bullet}{\rm OH}$ and ${}^{\bullet}{\rm H}$ in Aqueous Solutions by Ultrasound Using Clinical Equipment

Keisuke Makino, Magdi M. Mossoba and Peter Riesz
Vol. 96, No. 2 (Nov., 1983), pp. 416-421
DOI: 10.2307/3576225
Stable URL: http://www.jstor.org/stable/3576225
Page Count: 6
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## Abstract

Hydroxyl radicals and hydrogen atoms were produced in argon-saturated aqueous solutions exposed to ultrasound using clinical dental equipment. ${}^{\bullet}{\rm OH}$ and ${}^{\bullet}{\rm H}$ radicals were detected and identified by ESR and were spin trapped with 5,5-dimethyl-1-Δ-pyrroline-N-oxide (DMPO) and α-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 γ radiolysis of air-saturated water, and from uv photolysis of aqueous hydrogen peroxide solutions.

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