University of Delaware Hydrogel (IMAGE) University of Delaware Caption Close-up of University of Delaware hydrogel Credit Kathy F. Atkinson/University of Delaware Usage Restrictions Photo must include credit to University of Delaware. 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.