Photo of David Harper (IMAGE) University of Tennessee Institute of Agriculture Caption David Harper, a professor with the UT Center for Renewable Carbon, poses with a spool of carbon fiber precursor in the center's Carbon Material Science and Technology Unit. Credit Image courtesy UTIA. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.