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Thanh Le Bogdan Goranov Radka Vlaseva


In this paper ten symbiotic starter cultures for yogurt production were examined for their coagulation time, titratable acidity, pH at the moment of coagulation. Their maximum rate of acidification was also determined by model of fermentation kinetics. Three starter cultures were selected for production of Vietnamese yogurt. With the selected starter culture, yogurt from natural milk and reconstituted whole milk was obtained. Their coagulation time, acidity, maximum rate of acidification and rate of acidification during storage of product were studied. As a result of this study and mathematical modeling, we concluded that maximum rate of acidification at moment of coagulation and during storage was affected by the type of milk used in yogurt production.

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Akalin AS., Gonc S., Duzel S. Influence of yogurt and acidophilus yogurt on serum cholesterol levels in mice. Journal of Dairy Science, 1997, 80: 2721 – 2725.

Akira S., Uematsu S., Takeuchi O. Pathogen recognition and innate immunity. Cell, 2006, 124: 783 – 801.

Anderson JW., Gilliland SE. Effect of fermented milk (yogurt) containing Lactobacillus acidophilus L1 on serum cholesterol in hypercholesterolemic humans. Journal of the American College of Nutrition, 1999, 18: 43 – 50.

Bhatia S. S., Kochar N., Abraham P. Lactobacillus acidophilus inhibits growth of Campylobacter pylori in vitro. Journal of Clinical microbiology, 1989, 27, 2328- 2330.

Bouguettoucha A., Balannec B., Amrane A., Unstructured Models for Lactic Acid Fermentation: A Review, Food Technology and Biotechnology, 2011, 49(1) p.3–12.

Davidson R.H., Duncan S. E. Probiotic Culture Survival and Implications in Fermented Frozen Yogurt Characteristics. Journal of Dairy Science, 2000, 83, 666-673.

Fang H. Adhesion of Bifidobacterium spp. to human intestinal mucus. Microbiology Immunology, 2001, 45(3), 259 – 262.

Gordeev L., Koznov А., Skichko А., Gordeeva Yu. Unstructured mathematical models of the lactic acid biosynthesis kinetics: A Review, Theoretical Foundations of Chemical Engineering, 2017, 51(2), 175-190.

ISO 6091:2010 – Determination of titratable acidity.

Khoi, N.V., Dung T.V. The dairy industry in viet nam: a value chain approach. International Journal of Managing Value and Supply Chains, 2014, Volume 5, issue 3, page 1-17. Lourens-Hattingh A., Viljoen BC. Yogurt as probiotic carrier food. International Dairy Journal, 2001, 11, 1 – 17.

McBean, L. Emerging Dietary Benefits of Dairy Foods. Nutritional Today, 1999, v. 34, 47-53.

How to Cite
LE, Thanh; GORANOV, Bogdan; VLASEVA, Radka. Selection and study on technological parameters of symbiotic starter cultures Lactobacillus bulgaricus and Streptococcus thermophilus for production of Vietnamese yogurt. Food Science and Applied Biotechnology, [S.l.], v. 3, n. 2, p. 118-126, oct. 2020. ISSN 2603-3380. Available at: <>. Date accessed: 26 oct. 2020. doi: