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Aerosol characterization of surfactant using a Phase Doppler Interferometer (Artium Techologies, CA, USA) a. Aerosol particle size distribution profile for Curosurf. b. Average MMD as a function of air pressure. Symbol * indicates significant difference between paired groups (P<0.05). c. Velocity profile of Curosurf aerosol. d. Velocity profile of Infasurf aerosol at 40, 60 and 80 psi back-pressure.
