. . . "r hand, organic materials, including polymeric materials, capable of immobilizing or being otherwise compatible with bio-molecules, e.g. nitrocellulose, polystyrene, cellulose acetate, ethyl cellulose, activated nylon, polytetrafluoroethylene, polyvinyl difluoride (PVDF), polyamides, polyvinylchloride, di-vinyl benzene, agarose, and including copolymer and blends of such organic materials, as well" .