Ionized plasmas like those in neon signs and plasma TVs can sterilize water and make it antimicrobial as well, according to researchers studying the potential to use inexpensive plasma-generating devices to create sterile water in developing countries...
"Researchers have known plasmas will kill bacteria in water. Now, a new experiment shows that water treated with plasma killed all the E. coli bacteria that were added to it within a few hours of treatment and still killed 99.9 percent of the bacteria added after it sat for a week."
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