Fig. 3From: Size and dose dependent effects of silver nanoparticle exposure on intestinal permeability in an in vitro model of the human gut epitheliumResults of ATP-based cell viability assay after treatment with AgNP, silver acetate, and controls for 48 h. ‘Control’ cells were treated only with water (negative control), while ‘Tox C’ cells were treated with 0.5 % hydrogen peroxide (positive control). Error bars represent SEM and presence of asterisk denotes significance at p < 0.05Back to article page