Fig. 2From: Bronchial Epithelial Cell Matrix Production in Response to Silica and Basic Fibroblast Growth FactorAdherence of silica to surface of 16HBE cells. (A) Scanning electron micrograph of a control monolayer not exposed to silica. (B) Scanning electron micrograph of a monolayer exposed to silica (50 µg/ml) for 24 hr and then washed to remove unbound silica.Back to article page