Fig. 4From: Biodistribution of single and aggregated gold nanoparticles exposed to the human lung epithelial tissue barrier at the air-liquid interfaceCell viability estimated by quantification of the released lactate dehydrogenase enzyme after exposure to single and aggregated AuNPs at an applied dose of 300 ng/cm2. Values expressed as a mean (n = 3) after normalization to the negative control. Negative control: exposure to saline solution; Positive control: treatment with 0.1% triton X-100. Sing: single AuNPs; Agg: aggregated AuNPsBack to article page