Fig. 1
From: Impact of in vitro digested zinc oxide nanoparticles on intestinal model systems
Proportion of free zinc ions (supernatants; white bars) and bound zinc (precipitates; black bars) in the intestinal juice after in vitro digestion of zinc oxide nanoparticles (ZnO NP < 50 and < 100 nm) or zinc chloride compared to the solvent control (= SC, intestinal juice), represented as total amount of zinc (a) and percentage of the total zinc content (b). Data are expressed as mean + SD, n = 4