Figure 1.

In vitro half-life of xylitol in human airway epithelia. Panel A. Transmission electron micrograph of perfluorocarbon/OsO4 fixed human airway epithelia grown on a semi-permeable membrane filter. The vertical bar in the left upper quadrant shows ASL height which measured 5 μm. Panel B. Xylitol concentration in the basolateral surface quantitated by NMR after addition to the apical surface.