Chitin hydrogel preparation (IMAGE) Tsinghua University Press Caption This schematic shows the preparation of chitin hydrogel via the solvent exchange-assisted acetylation of chitosan hydrogel. Credit Nano Research, Tsinghua University Press Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. License Original 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.