ACTIVATED POLYMERIC SUPPORTS, NAMELY, RIGID, LOW-SWELLING BEADS COMPOSED OF POLYMER MATRICES WITH A HIGH DEGREE OF POROSITY FOR THE IMMOBILIZATION OF ENZYMES; CHEMICALS FOR USE IN INDUSTRY AND SCIENCE; CHEMICALS FOR USE IN THE BIOCHEMICAL AND CHEMICAL INDUSTRY; CHEMICALS FOR USE IN BIOTECHNOLOGICAL MANUFACTURING PROCESSES; CHROMATOGRAPHY CHEMICALS FOR SEPARATION AND PURIFICATION OF BIOMOLECULES