Studies of the composition of fermented milk product obtained from combined dairy raw materials using meso-thermophilic starter culture and plant extract

Abstract

The dairy industry, as one of the main components of the food industry of the Republic of Kazakhstan, should not only provide the population with traditional types of milk and its processed products, but also participate in the formation of the concept of healthy nutrition by producing dairy products with new nutritional and biological properties aimed at improving the health of the population of all age categories. One of such directions is the enrichment of the composition of such products with biologically active substances from plant raw materials of local growth.Our previous studies have shown that the combination of raw milk raw materials, represented by cow's and mare's milk in a ratio of 85% and 15%, respectively, improves the physico-chemical, mineral and amino acid composition of the fermented milk product obtained from this raw material due to the presence of mare's milk in it.The use of an extract of vegetable raw materials for the enrichment of a fermented milk product is the next stage of our research on the production of functional dairy products. The article presents the results of experiments conducted to select the parameters of fermentation of the initial combined dairy raw materials with a starter culture containing meso-thermophilic cultures together with a plant extract with a study of the mineral, chemical, microbiological and amino acid composition of the resulting fermented milk product.A plant extract obtained from 6 types of medicinal plants was selected, consisting of 20 parts of hawthorn, 5 parts of sage, oregano, thyme, basil and 2.5 parts of cloves. The optimal amount of plant extract for enriching the fermented milk product has been established – no more than 3% of the total volume of the initial milk raw materials, which allows to correspond to the number of dairy microorganisms – at least 1 x 106 CFU/ cm3 , the normalized value laid down in TR CU 033/2013, and also not to worsen the organoleptic parameters of the final fermented milk product.The content of amino acids in the fermented milk product due to enrichment with plant extract, for example, arginine increases by 2.5 times, lysine by 2 times, tyrosine by 15%, phenylalanine by 25%, histidine by 33%, leucine isoleucine compared to the original dairy raw materials by 37%.