부산대학교 도서관

The article substantiates the expediency of improving of technological methods of processing unprofitable small fish and expanding of the food products range from them. It proposes enriching of the flesh of freshwater fish with trace elements by adding chelate complexes based dietary supplements to salt or brine during the salting of raw materials. The kinetics of penetration of the chelate complexes micronutrients based dietary supplement into the muscle tissue of crucian carp was researched using the method of electronic paramagnetic resonance (EPR). The salting was performed using three methods. In the first, dry method of salting the fish was mixed with sodium chloride NaCl with the addition of a chelate complex based dietary supplement in the amount of 20–25% and 0.1% of the weight of raw material, respectively. In the second, brine method the fish was salted in brine, which was a solution of sodium chloride NaCl in the amount of 2 kg of salt per 1 kg of raw material. The amount of the chelate complex based dietary supplement was 0.1% of the weight of raw material. In the third method, the salting was performed in brine with the same concentrations of sodium chloride and dietary supplement, but the fish raw material was previously treated with ultrasound. The salting of fish lasted for 6 days. The distribution of Mn ions in the plane (i, j) was researched. The kinetics of penetration of the trace element into the volume of crucian carp muscle tissue was researched using the EPR method. The kinetics of Mn2+ ions distribution in the researched muscle tissue samples and the tomograms of these surfaces were determined. The values of the area under the EPR spectrum were normalized to the values of the area under the maximum EPR signal. In the dry salting method the signal from the liquid in which the raw material was during the salting was selected as the maximum EPR signal; and in the brine method the signal from the brine sample was selected as the maximum EPR signal. It is noted that the kinetics of penetration of the trace element is determined by the area of contact of the raw material with the diffusing substances and the method of intensification of the internal transfer of these substances inside the raw material. It was found that in the brine method and in the brine method with pre-sonication, the amount of trace element in the depth of the crucian carp muscle tissue varied within the error margin. This indicates the homogeneity of distribution of the trace element of the chelate complex based dietary supplement in these methods of salting. [ABSTRACT FROM AUTHOR]