Oil Droplets Embedded in a Hydrogel (IMAGE) Technical University of Munich (TUM) Caption Fluorescence microscopic image of oil droplets embedded in a hydrogel. This system, developed by Prof. Job Boekhoven and Caren Wanzke at the Technical University of Munich, can release drugs with a constant release rate over a tunable period of time. Credit Benedikt Riess / TUM 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.