Carbohydrate utilization and growth kinetics in the production of yogurt from soymilk. I. Experimental methods
1990
Buono, M.A. | Erickson, L.E. | Fung, D.Y.C. | Jeon, I.J.
Growth and sugar utilization of Lactobacillus bulgaricus and Streptococcus thermophilus were measured in soymilk. Total cell counts in the inoculum were made using the Breed smear. Correlations were developed between direct microscopic count and biomass dry weight for Lactobacillus bulgaricus and for Streptococcus thermophilus. A 1 g to 1 g ratio of the pure cultures was found to be superior to a 1:1 cell number ratio for the mixed culture inoculum. Carbohydrate substrate concentrations (sucrose and stachyose) were followed by high performance liquid chromatography. The methodologies for making these measurements on set cup style soymilk yogurts were developed and checked for precision in this study.
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