| http://www.w3.org/ns/prov#value | - The dialysis membrane produced according to the process of the invention is in the form of flat films, tubular films or hollow threads of regenerated cellulose includes isocyanate prepolymers having an average molecular weight of 300 to 50,000 and being soluble in organic solvents other than solvents which react with isocyanate groups and dissolve cellulose, which prepolymers are bound chemically
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