JHU Nanoparticles 1 (IMAGE) Johns Hopkins University Caption In a Johns Hopkins chemical and biomolecular engineering lab, Justin Hanes, an associate professor, and doctoral student Samuel K. Lai tested coated nanoparticles that could deliver medications through the body's sticky mucus layers. Credit Will Kirk/JHU 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.