Fig. 5From: Rapid changes in mucociliary transport in the tracheal epithelium caused by unconditioned room air or nebulized hypertonic saline and mannitol are not determined by frequency of beating ciliaCorrelation between overall mean mucus transport velocity (MTV) and cilia beat frequency (CBF) measurements under different air temperatures and humidities. Non-linear regression gives an R2 of 0.87 and suggests that a minimum CBF of ca. 6 Hz is required for MTV > 0Back to article page