Todd Sulchek's Microbeads (IMAGE) Georgia Institute of Technology Caption This is a microscopy image of immune cells activated by functionalized microbeads. A green fluorescence overlay shows intracellular beads that were swallowed by the immune cells. Beads outside the immune cells appear black. Credit Todd Sulchek 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.