Figure 1From: Pulmonary response to intratracheal instillation of ultrafine versus fine titanium dioxide: role of particle surface areaElectron micrographs of titanium dioxide particles suspended in BALF. A transmission electron micrograph of UFTiO2 suspended in BALF (A). Magnification of 60,000 × (note 500 nm scale bar). A scanning electron micrograph of FTiO2 suspended in BALF (B). Magnification of 20,000 × (note 1 um scale bar).Back to article page