The paper describes changes in thermal properties in the process of freezing of marine raw materials. The study objects were the skin of giant octopus (Octopus dofleini L.), pallium of Pacific squid (Todarodes pacificus L.), milt of Pacific herring (Clupea pallasii L .), a nd muscle t issue of Japanese c ucumaria (Cucumaria japonica L.). The mathematical relations of the studied thermal parameters allowing the calculation of specific heat capacity, thermal conductivity coefficient and tissue density of the studied objects in the process of freezing were obtained. It was found that the change in the total specific heat capacity during the freezing of all the objects under study was of the same type: first, this figure increases due to the intensive ice formation in the tissues of hydrobionts, and then decreases due to a significant decrease in the content of the liquid aqueous phase. The values of the total specific heat capacity before the freezing of seafood were determined (kJ/kg·K): 4.26 for squid, 3.58 for milt of Pacific herring, 3.66 for octopus skin, and 3.95 for the shell of cucumaria. It was revealed that an increase in the amount of frozen out water decreased the density of samples of frozen raw materials. This was due to the high (77.4–88.9%) content of water, turning into ice, which has a lower density index. The values of hydrobionts’ tissue density before freezing were obtained ( 0 ρ , kg/m3): 1226.74 for squid, 1209.6 for milt of Pacific herring, 1128.55 for octopus skin, and 031.26 for shell of cucumaria. It was established that the thermal conductivity of the hydrobiont tissue samples in the process of freezing increased with the growth of the proportion of frozen out water contained, approaching the thermal conductivity of ice. The calculated values of thermal conductivity coefficient of seafood tissue prior to freezing equal (W/m·K): 0.52 for squid, 0.47 for milt of Pacific herring, 0.63 for octopus skin, and 0.53 for cucumaria. The obtained thermal characteristics values of the objects studied are recommended for use in technical and technological calculations of aquatic biological resources cooling treatment processes.

Biocorrectors are dry concentrates from natural raw sources with high nutritional value due to the high content of important chemical components of food, including essential, minor, and biologically active nutrients. The raw material for the production of natural biocorrectors can be waste from cutting the fish and animal products. It is promising to use the skin of an octopus, the weight of which during cutting is up to 37% of the weight of raw materials, Pacific herring milt, which is formed during cutting in an amount of up to 12.4% of the weight of raw materials, and bivalve mantle mollusk of Primorsky scallop, accounting for about 10% of its mass. The goal of the research is to obtain dry food concentrates from seafood waste that exhibit functional properties. To preserve and form the specific properties of finished products, namely high biological value, digestibility, organoleptic indicators of concentrates, low-processing temperatures (cryotechnology) were used, which maximally preserved the composition, structure and other natural properties of raw materials. The dry seafood concentrates obtained by cryogenic technology exhibit high functionality and can be used as biocorrectors of food in order to impart high nutritional and biological value to it due to the balance of microand macronutrients.