O. V. Shelyuk, N. Ye. Nurishchenko, K. O. Medynska

Taras Shevchenko Kyiv National University, Ukraine;
e-mail: shelyuk_olga@ukr.net

A comparative study of rabbit skeletal muscles oxide-modified actomyosin superprecipitation reac­tion in dependence on continuous and impulsive (2 ms) ultrasound regimens was studied. From the analyses of kinetic curves the effect of the value of superprecipitation (А_m – А₀), time t1/2, required for achievement of half of its value was determined, and the normalized maximal rate of this reaction V_n was also calculated. It is shown that the use of continuous ultrasound to oxide-modified actomyosin was associated with a significant decrease of superprecipitation relative to controls. However, pulsed ultrasound caused a significant increase in superprecipitation value except for the values (А_m – А₀) in the application of the intensity of 0.2 W/cm². The oxide-modified actomyosin superprecipitation value under the effect of continuous and impulsive ultrasound at intensity 1 W/cm² in relative to control and all other applied intensities decrease to the most extent. It is caused perhaps by thermal influence of ultrasound. In general, the data obtained give reason to assume that the effects of continuous and pulsed ultrasound on the reaction of oxide-modified proteins complex superpretsipitatsii identical.