Hydrogel Polymers (image) University of Rochester Caption This is a representation of hydrogel polymers (straight lines) trapping stem cells (light-colored figures) and water (blue). Credit Graphic by Michael Osadciw/University of Rochester. Usage Restrictions None 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.