Hydrogel Combs (IMAGE) Texas A&M University Caption Comb-like molecules within the meshes of the hydrogel prevent small molecules, like glucose-sensing assays, from leaking out. Credit Dr. Melissa Grunlan/Texas A&M University College of Engineering 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.