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Acrylic monomers were grafted on the surface of commercial polyamide membranes using plasma polymerization and ultraviolet irradiation techniques. Graft reaction was confirmed by X-ray photoelectron spectra. Grafting yield increased with plasma and ultraviolet exposure time. Permeation of riboflavin through graft membranes was investigated. Poly(acrylic acid-g-amide) membranes showed a decrease in...