Aim: We studied the effects of different waves of ultraviolet radiation (UV) on DNA damage in different cells, and established the model of DNA damage and repair of K562 cell induced by UVC.Methods: 1. The effects of DNA damage in different cells induced by different waves and doses of ultraviolet radiation (UV) were tested by comet assay. 2. The effects of UVC on K562 cell was investigated by MTT test, morphological observation, cell count and comet assay. The cell cycle distribution was detected by the fl...