Biodegradability of Chitosan Nanoparticles (image) National Research Council of Science & Technology Share Print E-Mail Caption SEM images of changes in chitosan nanoparticles over time when stored at room temperature. Chitosan nanoparticles are decomposed after 30 days. Credit Korea Institute of Machinery and Materials (KIMM) Usage Restrictions The sources of photos and research results from KIMM must be specified. Share Print E-Mail 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.