Freeze dried cellulose acetate membranes with 1000 A pores.
D002482:Cellulose; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004147:Dioxins; D005612:Freeze Drying; D008567:Membranes, Artificial
D004147:Dioxins; D008567:Membranes, Artificial; D002482:Cellulose