Elongated seamless capsules containing biological material are prepared by a method in which a coagulant, which includes a cell suspension or other biologically active factor, and a polymeric casting solution are extruded through a common extrusion port having at least two concentric bores, such that...http://www.google.es/patents/US5418154?utm_source=gb-gplus-sharePatente US5418154 - Method of preparing elongated seamless capsules containing biological material
Method of preparing elongated seamless capsules containing biological material
