title: The structure and some properties of graded highly asymmetrical porous membranes.
mesh_terms: D008567:Membranes, Artificial; D008851:Micropore Filters / Q000592:standards; D008855:Microscopy, Electron, Scanning; D011108:Polymers; D013450:Sulfones; D013499:Surface Properties
chemical_list: D008567:Membranes, Artificial; D011108:Polymers; D013450:Sulfones