Fig. 7From: Effect of gadolinium-based nanoparticles on nuclear DNA damage and repair in glioblastoma tumor cellsEffect of GdBNs on clonogenic survival fraction of U87 cells. Surviving fractions of U87 cells never incubated with GdBNs (grey) or in the U87 incubated with 1 mM GdBNs for 1 h (purple) and irradiated by 1 and 4 Gy of γ-rays (60Co), respectively. Non-irradiated controls (dose 0) were normalized to 1Back to article page