... between the NO-generating chemicals and the skin. The aim of the present study was to determine whether NO derived from this chemical system was able to diffuse through the membrane and have a measurable vasodilatory effect on forearm skin in healthy volunteers. The Sympatex™ 10 μ m membrane was found...

... glycol-400 with the phospholipid. No permeation of lactulose was seen in any of the experiments. 4. Our results suggest that, because of its interaction with lipid solvents, polyethylene glycol-400 is unsuitable as a probe to measure passive intestinal permeability in vivo. diffusion intestinal...

... open-circuit, multiple-breath wash-in of a mixture containing helium (He) and sulphur hexafluoride (SF 6 ). The simultaneous use of a light and a heavy gas helps to identify diffusive mechanisms. 3. MBME fell almost linearly with log Z , the proportion of total wash-in remaining uncompleted...

... on molecular size, even after correction for aqueous diffusion differences, such that a profile of restricted permeability could be described for this range of markers. Interpretation in terms of conventional pore theory suggested the presence of more than one population of pores. 3. Ingestion of solutions...

...R. Levinson; M. Epstein; M. A. Sackner; R. Begin 1. The effects of acute intravenous infusion of 2 litres of saline/120 min on pulmonary capillary blood flow (Q̇c), diffusing capacity per unit of alveolar volume (DL/VA), functional residual capacity (FRC), and pulmonary tissue plus capillary blood...