This image shows fluorescent protein molecules inside a piece of plastic. Engineers at Ohio State University have used a condensed form of carbon dioxide to embed protein molecules in plastic -- a first step toward developing plastic implants that dispense medications. Image courtesy of Ohio State University.
This false-color image shows voids within pieces of plastic that were created using a process under development at Ohio State University. Engineers here used a condensed form of carbon dioxide to embed protein molecules in plastic, and discovered that the process could be controlled to produce voids within the material. Image courtesy of Ohio State University.

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