Sarah Perry, University of Illinois at Urbana-Champaign (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption This is Sarah Perry, a study co-author and professor of chemical engineering at the University of Massachusetts, Amherst. Credit Photo courtesy Sarah Perry. Usage Restrictions Photo may be used with stories related to this release. Credit required. Photo courtesy Sarah Perry. Share Print E-Mail 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.