Initial and post-incubation rod-coccus counts(cfu/ml) were determined by plating on LB medium. Initial and post-incubation rod-coccus counts(cfu/ml) were determined by plating on LB medium. S. thermophilus actively adapts to freezing during a pretreatment at 20°C, resulting in an approximately 1,000-fold increased survival after four freeze-thaw cycles compared to mid-exponential-phase cells grown at an optimal temperature of 42°C. Optimum temperatures for acid production in S.thermophilus strains ranged from 2 to 8 degrees above optimum growth temperatures, averaging 43.6 C. Average optimum temperature for acid production in L.bulgaricus strains was 44.9 C. All strains were tested for starch and urea hydrolysis. Streptococcus thermophilus strains reached greater cell numbers than L. bulgaricus at 37, 42, and 45°C in 93.3% of the mixed culture trials. Lactococcus lactis subspecies cremoris is more salt sensitive (<4%) and more temperature sensitive (40°C) than …
2003 Feb;86(2):407-23. doi: 10.3168/jds.S0022-0302(03)73619-4. thermophilus, Lactococcus lactis subsp. - 77.245.149.12.
Exopolysaccharides from bacteria and fungi: current status and perspectives in Africa. NZJ Dairy Sci Technol 18:191–196, O'Leary VS, Woychik JH (1976) Utilisation of lactose, glucose and galactose by a mixed culture of Streptococcus thermophilus and Lactobacillus bulgaricus in milk treated with lactase enzyme. respectively. Only one of nine strains of S.thermophilus In addition, the two strains were generally more sensitive to pH effect. The growth of Streptococcus salivarius subsp. and Jisc. Temperature growth range is between 10-42°C, growth is inhibited at temperature greater than 39°C and optimum growth range is between 20-35°C. Aims: To study the effect of different fermentation conditions and to model the effect of temperature and pH on different biokinetic parameters of bacterial growth and exopolysaccharides (EPS) production of Streptococcus thermophilus ST 111 in milk-based medium. was found to hydrolyze starch. No. Xverage rod/coccus ratios obtained J Dairy Sci 69:2558–2568, Robinson RK (1988) Cultures for yogurt. The use of an appropriate milk-based medium and a combined model of temperature and pH can be of practical importance for the production of yoghurt or other fermented milks as well as for process optimization of the large-scale production of starter strains to be used for their EPS production. S.thermophilus reached higher cell numbers than L.bulgaricus at 37,42 and 45 C in 93.3. of the mixed culture trials. Primary and secondary modelling of different fermentations revealed an optimum temperature and pH of 40 degrees C and constant pH 6.2, respectively, for growth in milk medium supplemented with whey protein hydrolysate. Methods and results: Appl Microbiol Biotechnol 25:442–448, Lallai A, Mura G, Miliddi R, Mastinu C (1988) Effect of pH on growth of mixed cultures in batch reactor. Get the latest research from NIH: https://www.nih.gov/coronavirus. at 37, 42 and 45 C were 1:2.2, 1:8, and 1:2.4 Breed et al. S.thermophilus reached higher cell numbers than L.bulgaricus at 37,42 and 45 C in 93.3. of the mixed culture trials. Optimum temperature for acid production ranged from 2 to 8°C above optimum growth temperature. Lait 57:1–23, Accolas JP, Hemme D, Desmazeaud MJ, Vassal L, Bouillanne C, Veaux M (1980) Les levains lactiques thermophiles: propriétés et comportement en technologie laitiére.

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