Micrograph of Nanoparticles in Tumor Cell (IMAGE) California Institute of Technology Caption This electron micrograph shows the presence of numerous siRNA-containing targeted nanoparticles both entering and within a tumor cell. Credit Caltech/Swaroop Mishra Usage Restrictions With credit as given. 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.