| http://www.w3.org/ns/prov#value | - Such membranes may comprise, for example, cellulose ethers and other cellulose derivatives such as cellulose nitrate, cellulose acetate, cellulose acetate butyrate or cellulose acetate propionate; polyesters, such as polyethylene terephthalate, polystyrene, including copolymers and blends of the same; polylactides, including copolymers thereof with p-dioxanone, polyglycolides, polylactidglycolides
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