Rohit Karnik has focused on developing new water filtration technologies for six years, often drawing on detailed physical knowledge of how fluids behave at the smallest scales.
At a conference designed to bring together researchers from different disciplines, he found himself transfixed by a scientist’s description of how sap flows through plants.
Karnik and a team that includes a high school teacher and a high school student reported the details last month in the journal PLoS ONE of a promising next-generation water filter that might be effective, cheap, and biodegradable. The technology? A branch from a pine tree stripped of its bark.
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