5. 超音波の化学的効果および機械的効果の周波数依存性

概要

論文の詳細を見る
To examine the frequency-dependence of chemical and mechanical effects induced by ultrasound, iodine release from aqueous solution of potassium iodide and cell lysis of mouse mammary carcinoma FM3A cells after sonication at frequencies of 28, 47, 400 and 1200 kHz were studied. The highest relative ratio of chemical effects (iodine release) /mechanical effects (cell lysis) of ultrasound was observed at 400 kHz. Hydrogen peroxide formation (mainly due to recombination of OH radicals) in argon or oxygen-saturated aqueous solutions was also studied at various frequencies. The ratio decreased with increasing frequency. The rate of hydrogen peroxide formation induced by ultrasound is 2.7 times greater in the presence of argon than of oxygen at 28 kHz, in contrast to the situation at 1200 kHz, where the ratio is 0.65. These results clearly indicate frequency effects on the relative sonochemical yield of iodine formation and of the sonochemical recombination producing hydrogen peroxide in the presence of argon and oxygen.
日本ソノケミストリー学会の論文