| http://www.w3.org/ns/prov#value | - In general, the membranes of the invention include a porous polymeric material (e.g., polyethylene, polypropylene, polysulfones, or polyether urethanes, or copolymers such as copolymers of polyethylene and polypropylene, or copolymers of polyethylene and polytetrafluoroethylene, in various sizes and shapes such as films, sheets, fibers, tubes, nonwoven fabrics, hollow fibers, and other configurati
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