Fig. 10
Transmission electron micrographs showing the ultrastructural changes in the midgut of the third larval instar of C. pipiens mosquito in response to LC50 treatment with Cr/ZnO NPs a, b An epithelial cell in treated larvae showing missed microvilli and clear condensation of the nucleus with clear vacuolation in the cytoplasm near the basement membrane. c, d the cells have vacuolated nuclei and nucleus with heterochromatin. e, f The epithelium in the treated larva vacuolated and have abnormal nucleus shapes. Cy (cytoplasm), dMV (microvilli), HC (heterochromatin), M (mitochondria), Ab N (abnormal nucleus) and VN (vacuole nucleus)