1 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 FILTRATION MATERIAL IN THE FORM OF POWDERS AND GRANULATED SUBSTANCES, SOLID SUBSTANCES WITH PERFORATION, SINTERED SUBSTANCES WHICH ARE POROUS AND BASED ON CHEMICAL, MINERAL OR VEGETABLE MATERIAL, RAW PLASTIC MATERIAL OR CERAMIC PARTICLES, USED FOR SELECTIVE FRACTIONATING AND FOR ADSOBING AND ABSORBING TOXICAL CHEMICAL PRODUCTS, AND AS SOLVING AGENTS IN THE FOOD PROCESSING, PHARMACEUTICAL, CHEMICAL, BIOLOGICAL, SEWAGE AND WASTE WATER PROCESSING, AND ENVIRONMENTAL INDUSTRIES