Object of research: irreversible colloidal clouds of white table wine materials. The objective: development of methods to evaluate and to activate the tannin for white table wine materials stabilization. Methods: standard and new methods of the analysis of chemical structure of white table wine materials, standard and developed methods of tannin evaluation, tests for irreversible colloidal clouds in winemaking. Novelty: parameters of quality indices of tannin preparations have been revealed for the first time responsible for their stabilizing action; a model describing interaction of proteins with condensed and hydrolyzed tannins has been substantiated, the mode and parameters of tannins activation with the aid to optimize their stabilizing properties have been substantiated, the modes and parameters of treatment of white table wine materials with preparations of the activated tannin have been developed. Realization: methodological instructions "Methods to evaluate the tannin for stabilization of whitetable wine materials against irreversible colloidal clouds" have been recommended to be used under industrial conditions. The protocol developed: in joint venture "Limansky" (Nikolaev region), limited company "Peremoga" (Odessa region), S. Perovskaia close stock company, company "Bachus" (Autonomous Republic of the Crimea); the way of activation of the gallotannin protected by the patent № 52181А of Ukraine has been developed; the "Technological Instruction for preparation of the activated tannin for stabilization of white table wine materials" has been developed. Implementation: the activated gallotannin as a stabilizing agent has been tested under industrial conditions. The volume of implementation: 60000 dal of wine material. Field: Wine industry
