Tooth 2 (IMAGE) Rice University Caption A hydrogel developed at Rice University is designed to trap small-molecule drugs in hydrophobic spaces inside its constituent fibers. Earlier hydrogels release their cargoes more quickly by diffusion, while "missing tooth" hydrogels would prolong the release of drugs into the surrounding environment. Credit I-Che Li/Rice University 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.