| http://www.w3.org/ns/prov#value | - The rate-limiting permeable membrane 150 may comprise a composition such as polyvinyl alcohol, ethylene vinyl acetate, silicone, nylon, polypropylene, polycarbonate, cellulose, cellulose acetate, cellulose esters, polymer composites, Poly(2,6-Dimethylphenylene oxide), or polyether sulfone by diffusion.
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