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Ultrasonic waves of high frequency (1.7 MHz) and low intensity (0.6 W cm−2) were employed to prevent cyanobacterial cells from growing fast and the effects of this growth inhibition were investigated. At least five minutes of ultrasonic irradiation was essential for effective inhibition. The growth rate of irradiated cells was reduced to 38.9% of the control during short-term culture. Longer exposure...
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