| abstract |
A method of preparing a biologically active membrane comprises the steps of reacting a hydrophilic, microporous, skinless, polyamide membrane with an activating agent to form a chemically activated membrane. Thereafter the membrane is reacted with an acceptor molecule to form the biologically active membrane and such acceptor molecule may be a monoclonal antibody or a wide variety of other molecules. n The invention also relates to a biologically active membrane made by the method, a filter element incorporating such a membrane and a method of recovering a ligand from a solution which is passed through the biologically active membrane or through a filter element. |