hydrogel (IMAGE) Brown University Caption Graduate student Zahra Ahmed was part of a research team at Brown that created a new hydrogel drug delivery system. Credit Juan Siliezar/Brown University. Usage Restrictions Credit must be given to the creator. License CC BY 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.