April 9, 2008 - Using propanediol as a starting point, DuPont has created a new polymer it calls Cerenol, which it substitutes for petroleum-sourced ingredients in products like auto paints. George John, a chemist at the City College of New York, and others, for example, have designed a polymer gel for drug ingestion using a byproduct of the fruit industry as a starting point. John Pierce, DuPont’s vice president for applied biosciences-technology.