Fig. 10
From: Processing of collagen based biomaterials and the resulting materials properties
a, b Permeability of different substances through collagen membranes (Biogide®) prepared from porcine skin. The diffusion rate between chambers A and B depends on molecular weight and the chemical nature of the substances (a). Sodium chloride is absorbed at low concentrations until saturation (b). Filled triangle: Tryptophane; filled circle: NaCl; filled square: glucose; filled diamond: hyaluronic acid (Mw ~ 1.2 MDa); (own unpublished data)