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Fig. 3 | Respiratory Research

Fig. 3

From: Electronic cigarette vapor alters the lateral structure but not tensiometric properties of calf lung surfactant

Fig. 3

Infasurf® surface topology at various surface pressure values (20, 30 mN/m, 40 mN/m. and 50 mN/m) as examined by atomic force microscopy after exposure to 900 mL of (a) clean air, (b) e-cigarette vapor, and (c) conventional cigarette smoke. Note that Infasurf® collapsed at 46.1 ± 1.3 mN/m after exposure to cigarette smoke; therefore surface topography could not be examined at 50 mN/m for this sample

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