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Robert Pelton: It's relatively easy to kill things. What's not out there is detecting things, proving that you've killed everything dangerous.
Randy Atkins: Robert Pelton, a chemical engineer at Canada's McMaster University, leads a team of researchers attaching biosensors to paper.
Robert Pelton: You want to find dangerous bacteria in a sea of friendly ones.
Randy Atkins: Labs do it with sensitive chemicals and equipment. The trick is making a product that can last on grocery shelves.
Robert Pelton: A simple paper towel that you could just wipe across the surface that would perhaps change color if it detected something that was dangerous.
Randy Atkins: Other applications might include face masks and meat wrappers. With the National Academy of Engineering, Randy Atkins, WTOP Radio.
Such products could become available in a couple years.