Composite Spheres (IMAGE) Penn State Caption This is a scanning electron micrograph of BCNU-loaded microspheres (black and white background) with 3D rendered images of brain cancers cells (yellow) and released BCNU (purple). Credit Mohammad Reza Abidian Usage Restrictions Non commercial use only 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.