Hydrogel (IMAGE) University of California - San Diego Caption After freeze drying the material, researchers mill it into a fine powder and then digest the powder with an enzyme, which creates a liquid that forms a gel upon injection. Credit Jacobs School of Engineering/UC San Diego Usage Restrictions Please credit Jacobs School of Engineering/UC San Diego 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.