SURFACE-MODIFIED CHEMICAL PRODUCTS FOR COMMERCIAL, SCIENTIFIC, PHOTOGRAPHIC, AGRICULTURAL, HORTICULTURAL AND FOREST PURPOSES, NAMELY FOR SUBSTRATES IMMOBILIZING BIOLOGICALLY ACTIVE COMPOUNDS, USED FOR SELECTIVE FRACTIONATION, FOR ADSORBING AND ABSORBING TOXICAL CHEMICAL PRODUCTS, AND AS SOLVING AGENTS IN THE MANUFACTURE OF ALTERED PLASTIC MATERIALS IN THE FOOD PROCESSING, PHARMACEUTICAL, CHEMICAL, BIOLOGICAL, SEWAGE AND WASTE WATER PROCESSING, AND ENVIRONMENTAL INDUSTRIES; SURFACE-MODIFIED FI...