Modern complex environmental conditions put forward the urgent need to improve the nutritional structure of the population at the expense of improving the quality, biological value and taste of the products. That is why the purpose of the work was to justify the use of thistle grist on kefir technology. In particular, the effect of thistle pellet on the organoleptic, physicochemical and microbiological parameters of kefir has been investigated. It was established that it had a homogeneous consistency with a broken clot and a color from white to cream with interspersed grist. Increasing the dose of thistle grist to 3% and 4% has led to a taste with sharply pronounced flavor of thistle and to a brown color with a pronounced thistle content. The kefir viscosity of 2.5 mg per kg changes over the seven days of storage, although it remains high enough for 8 days, namely 47 seconds. The growth of the viscosity of kefir with thistle grist is due to the hygroscopic properties of grist, resulting binds moisture free product. The analysis of microbiological parameters in the storage of kefir with thistle grist allows us to conclude about the satisfactory sanitary condition of the new product and its harmlessness for the consumer's health.

The purpose of the work was to improve the technology of multicomponent milk and protein products – curd products with functional and technological components – pumpkin succades, the use of which will allow to increase the biological value and stability of quality indicators of production. Succades are confectionery made from whole or sliced fruits, cooked with sugar, dried or sugar-coated or glazed. Production of succades from local cheap carotene containing raw materials, such as pumpkin, allows to expand the range of vegetable succades of domestic production. The experimental part of the work was performed at the Department of Milk and Dairy Technology of Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv. The research included the development of technology of succade of pumpkin and lemon balm, the choice of ways to make them at the optimum stages of the technological process, the improvement of curd mass technology, the development of their formulations, the study of the quality of the finished product. Raw materials used in the work comply with the State Standard of Ukraine and the requirements of other regulations in Ukraine. The study of a complex of indicators of the chemical composition of pumpkin succades indicates their high nutritional value. On the basis of literature and experimental studies, three variants of formulations of curd masses of high biological value have been developed. Pumpkin succades technology has been developed that has excellent organoleptic characteristics due to the preservation of color, taste of native raw materials and high nutritional value. Technology has been improved and technological parameters of curd production are described. In order to implement the developed technology in the shops for the production of new dairy products at the dairy enterprises it is not necessary to carry out the modernization or reconstruction of production. Experimental studies have determined the optimal dose of pumpkin succades, which is 50–100 kg. The basic physicochemical indices of curd products that meet the requirements of regulatory and technical documentation are investigated.

The purpose of the work was to investigate the effect of whey proteins and dry whey concentrates on the change of titrated and active acidity during digestion. In order to stabilize the consistency in the production of low-fat yogurts, dry whey was selected that met the requirements of State Standard 4552:2006. It is used to improve the taste of finished products, to add flavor, to improve the texture, as well as to improve overall quality. In addition, dry whey protein concentrate WPC 80 Milkiland was used. The addition of whey protein concentrate does not detract from the organoleptic characteristics of a normalized mixture, which allows it to be used in yogurt technology. The addition of whey proteins has a significant effect on the duration of gel formation. Whey protein concentrate and dry whey reduce the duration of latent fermentation and flocculation stages. The data obtained allows us to predict that they accelerate the coagulation process. This effect is enhanced by increasing the dose of protein concentrates. Conducted coagulation of milk with a different dose and observed changes in titrated and active acidity during the fermentation. Yogurt culture YF-L903, which includes Streptococcus salivarius subsp., Thermophilus, Lactobacillus delbrűeckii subsp. Bulgaricus were used for fermentation. The highest growth rate of titrated acidity is recorded for option 1 (0.5% dry sucrose) and controls that for 4 hours. the fermentation reached 80 °T. The highest rate of decline in active acidity is recorded in option 1 (0.5% dry sucrose serum). All samples for 4 hours of fermentation reached 4.65–4.72 units. pH. Thus, the acidity slightly increases with increasing the dose of serum protein concentrate and does not increase with the use of dry whey.