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Документ Influence of starch products on the vitality and activity of lactic acid bacteria in yogurt(2024) Ivashchenko, Olga; Khonkiv, Myroslav; Stabnikov, Victor; Polishchuk, Galyna; Marynin, Andriy; Buniowska-Olejnik, MagdalenaThe influence of starch product with different dextrose equivalents addition on the viability and activity of lactic acid bacteria Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus during fermentation and storage of yogurt has been studied. An increase of dextrose equivalent and monosaccharides content in starch products reduce the fermentation time of milk due to the increase of lactic acid bacteria activity. A slight decrease in water activity in the presence of glucose-fructose syrup in yogurt in an amount of 9% had virtually no effect on the milk fermentation process. The number of lactic acid bacteria increased during the first seven days of yogurt storage added with glucose-fructose syrup. On the 14th day of storage, the concentration of cells of S. thermophilus and L. delbrueckii ssp. bulgaricus became almost the same in all yogurts due to almost complete consumption of carbon sources. When the storage of yogurt was extended to 28 days, the most stable content of lactic acid bacteria was found in yogurt added with maltodextrin due to its prebiotic properties. The increases of active acidity and syneresis in all yogurts were greatest in the first 8–14 days. Presence of dextrins in yogurt stabilizes its physical and chemical properties during storage