Devices and methods are provided for treating, preventing from growth, and neutralizing microorganisms using high-frequency, low-energy ultrasound. A particular method is provided for treating a fountain solution including simultaneously exposing the fountain solution to gas microbubbles and high-frequency ultrasound. A particular device is also provided, including a compartment for holding a reservoir of fountain solution, a gas microbubble emitter configured to emit microbubbles into the compartment, and a high-frequency ultrasound-emitter configured to emit ultrasound signals into the compartment. The high-frequency ultrasound may be higher than 100 kHz.

 
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> Water filtering method and apparatus

> Bioreactor for selectively controlling the molecular diffusion between fluids

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