Figure 1. Increased reactive oxygen species (ROS) in cerebral cortical cells after 56Fe radiation. (A) Flow cytometry histogram showing ROS level two months after γ radiation. (B) Flow cytometry histogram showing ROS level two months after 56Fe radiation. (C) Quantification of ROS level two months after radiation presented as mean ± standard error of mean (SEM). (D) Flow cytometry histogram showing ROS level twelve months after γ radiation. (E) Flow cytometry histogram showing ROS level twelve months after 56Fe radiation. (F) Quantification of ROS level twelve months after radiation presented as mean ± SEM.