Fig. 6From: Gold nanoparticle distribution in advanced in vitro and ex vivo human placental barrier modelsDistribution of Au-4-PEG NPs in placental tissue after 6 h of perfusion. Placental tissue was perfused with 25 μg/mL Au-3-PEG NPs for 6 h. a, e H&E staining of placental tissue before (a) and after perfusion (e). b, f Elemental distribution of 79Br to visualize tissue structure. c, g 197Au was measured to localize Au. d, h Overlay of 79Br and 197Au to co-localize Au signals in placental tissue. Elemental distribution map of 79Br and 197Au is represented in signal intensities and Au concentrations (black: minimum, red: maximum), respectively. Images were obtained from one independent experimentBack to article page