Improvement of technology of fish semi-finished products with addition of non-сonventional raw materials

Abstract

Considering the results of studies of the scientific literature on the nutritional value and biological effectiveness of cranberries and goji berries, it was established that the development of technology of semi-finished products with their use is relevant and has practical significance in the technology of fish product production. The technology for the production of moulded fish semi-finished products opens up new opportunities in the field of rational use of secondary fish raw materials, making it possible to expand the range of functional fish products based on natural components, which will to some extent expand the current problem of processing raw materials of inland waters of Ukraine. The purpose of the research is to determine the biological value of new fish semi-finished products based on a combination of freshwater fish and non-conventional raw materials. The research presents the results of studies of the chemical composition, organoleptic evaluation and physicochemical changes of semi-finished products with the addition of nonconventional raw materials and the establishment of their shelf life. It was established that the control sample after 90 days of storage undergoes hydrolytic deterioration, which indicates intensive hydrolysis of lipids and accumulation of free fatty acids in this sample. In experimental samples, hydrolytic deterioration gradually increases and reaches a critical point only by the end of the shelf life. Oxidation processes in lipids of semi-finished products were explored by changes in the accumulation of primary oxidation products – peroxides and secondary products – carbonyl compounds. According to the dynamics of changes in the peroxide number of lipids of semifinished products, it was established that the control sample during 60-135 days is not subject to storage, and in the experimental samples after 135 days the quality of fat deteriorates and is described as not subject to storage. The authors have established that the developed technology of fish semi-finished products will significantly expand the range of functional products based on natural components, which will allow expanding the current problem of processing raw materials in inland waters of Ukraine to some extent