Fig. 3From: Cytotoxicity analysis of biomass combustion particles in human pulmonary alveolar epithelial cells on an air–liquid interface/dynamic culture platformA Average deposited doses (μg/cm2) of biomass combustion soluble constituent (BCSC) samples; B Scanning electron microscope (SEM) image of Teflon membrane; C SEM image of particles collected on the Teflon membrane. D SEM image of polycarbonate (PC) membrane; E and F SEM images of PC membranes exposed to 100- and 200-μg/ml BCSC samples, respectivelyBack to article page