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 7

(a) Histological section of gill exposed to nano-SiO/Al₂O₃ (2 : 1) showing secondary gill lamella (SGL), blood vessel, and epithelial hyperplasia (HPS) (H&E stains, ×400). (b) Histological section of gill exposed to bulk SiO/Al₂O₃ (2 : 1) showing primary gill lamella, shortened secondary gill lamella (SSGL), and blood vessel (BV) (H&E stains, ×400).

(a)

(b)