Nanoparticles in mast cells (IMAGE) Northwestern University Caption In this scanning eletron microscopy image, arrows point to decorated nanoparticles (colorized in purple) that have entered a mast cell. Credit Evan A. Scott/Northwestern University Usage Restrictions add credit 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.