NOVEL COMPOSITE MEMBRANES BASED ON CHITOSAN COPOLYMERS WITH POLYACRYLONITRILE AND POLYSTYRENE: PHYSICOCHEMICAL PROPERTIES AND APPLICATION FOR PERVAPORATION DEHYDRATION OF TETRAHYDROFURAN

Pervaporation has been applied for tetrahydrofuran (THF) dehydration with novel composite membranes advanced by a thin selective layer composed of chitosan (CS) modified by copolymerization with vinyl monomers, acrylonitrile (AN) and styrene, in order to improve the chemical and mechanical stability of CS-based membranes.Composite membranes were de

The retinal rod outer segment is a sensory cilium that is specialized for the conversion of light into an electrical signal.Within the cilium, up to several thousand membranous disks contain as many as a billion copies of rhodopsin for efficient photon capture.Disks are continually turned over, requiring the daily synthesis of a prodigious amount o