Red Nanoparticles (IMAGE) Johns Hopkins Medicine Caption Florescent red nanoparticles distributed throughout blue-dyed bladder tissue in mice. Credit Umara Afzal and Abhijit Date 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.