Fig. 8

A CT images of the GI tract after oral administration of BiF_3: Ln@PVP NPs at different intervals (0, 15 min, 30 min, 120 min, 6 h, 12 h, 24 h, and 48 h). B H&E staining images of stomach, small intestine, and large intestine before and after oral administration of BiF3: Ln@PVP NPs (scale bar, 200 µm). “S,” “SI,” and “LI” represent stomach, small intestine, and large intestine, respectively