Fig. 5. Effect of the intravenously injected ZIF-8 MOFs on RBCs of the SD rats: (A) RBCs count; (B), Mean Corpuscular Volume (MCV); (C) hemoglobin concentration (HGB); (D), mean corpuscular hemoglobin concentration (MCHC) (means ± SD, n = 4. Statistical significance: *p < 0.05, and **p < 0.05).