Fig. 2From: Cytotoxicity analysis of biomass combustion particles in human pulmonary alveolar epithelial cells on an air–liquid interface/dynamic culture platformA A schematic illustration showing the air–liquid interface (ALI)-dynamic culture (DC) platform and ALI exposure concepts. B Photographs of the fabricated ALI–DC platform (i), experimental setup for DC in the platform (ii), and basic structure of the platform for cellular exposure to test substances (iii), length unit: mm. C Photographs of DAPI-stained HPAEpiC nuclei cultured on the modified polycarbonate membrane on days 1, 3, 5, and 7, respectively. Scale bars = 20 μmBack to article page