Figure 1
From: Polyurethane membrane with porous surface for controlled drug release in drug eluting stent

Surface and cross-sectioned scanning electron micrographs of PU membranes before and after washing process.
From: Polyurethane membrane with porous surface for controlled drug release in drug eluting stent

Surface and cross-sectioned scanning electron micrographs of PU membranes before and after washing process.