THE STUDY OF PROTEOLYTIC ACTIVITY OF ENZYME SYSTEM OF MUSCULAR TISSUE AND INTERNAL ORGANS OF PONDFISH WITH THE PURPOSE OF THEIR APPLICATION IN PRESERVE PRODUCTION
The object of the research is pondfish species of autumn period found in Ikryaninskiy district of Astrakhan region: silver carp (<i>Hypophthalmichthys</i>), carp (<i>Cyprinus carpio</i>) and grass carp (<i>Ctenopharyngodon</i>). The study of chemical composition of these species has been made in accordance with State Standard 7 636-85 and the energy value of their meat has been calculated. The experiments on determination of the constants of autoproteolysis of muscular tissue and internal organs showed that proteolytic activity of cathepsins of muscular tissue (in accordance with L. V. Antipova's method) was 0.03-0.06 unit/g; of enzyme activity of internal organs (according to G. T. Nekrasovа's method) - 2.42-2.8 unit/g; activity of enzymatic agents derived from the internal organs (by Ansona's method) was 2.39-2.79 unit/g depending on the fish species. The results of the study allow to select the modes of fish salting and doses of enzymatic agents introduction while developing the technology for the preparation of preserves from muscular tissue of pondfish species.