Antagonistic Effects of Sublethal Concentrations of Certain Mixtures of Metal Oxide Nanoparticles and the Bulk (Al₂O₃, CuO, and SiO₂) on Gill Histology in Clarias gariepinus

Figure 9

(a) Histological section of gill exposed to bulk Al₂O₃/CuO (2 : 1) showing oedema (OD) and epithelial hyperplasia (HPS) (H&E stains, ×400). (b) Histological section of gill exposed to bulk Al₂O₃/CuO (1 : 2) showing primary gill lamella (PGL), epithelial lifting (EPL), and hypertrophy (HPT) (H&E stains, ×400).

(a)

(b)