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Tiny Bubbles Turn Water Into Effective Cleaning Tool

While a stream of ordinary cold water may clean some dirt it is not considered an effective cleaning agent. But when two inventors at the University of Southampton added a little ultrasound the water became highly effective for removing germs from tiny cracks and crevices. Under ultraviolet light greasy residue on human hands becomes visible, but trying to rinse it off with ordinary cold water is next to impossible. Infusing the water stream with a bit of ultrasound turns it into...

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