Fig. 5From: Impact of in vitro digested zinc oxide nanoparticles on intestinal model systemsRepresentative TEM images of Caco-2 monocultured (upper row) and Caco-2/HT29-MTX cocultured cells (lower row) after 24 h of treatment with digested ZnO NP (< 50 nm and < 100 nm) and ZnCl2 (614 µM) as well as cell culture medium (untreated control = UC) and 10% intestinal juice (solvent control = SC). Orange scale bar: 5 μmBack to article page