prov:value
| - In certain embodiments of the invention, the at least one polymer comprising the semipermeable membrane will desirably be a cellulose ester, such as for example, cellulose acetate, cellulose acetate acetoacetate, cellulose acetate benzoate, cellulose acetate butylsulfonate, cellulose acetate butylate, cellulose acetate butylate sulfate, cellulose acetate butylate valerate, cellulose acetate caprat
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