کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6399229 | 1330690 | 2012 | 7 صفحه PDF | دانلود رایگان |
The organic acids profile, sugar metabolism and biomass growth of Streptococcus thermophilus (St) and Bifidobacterium lactis (Bl) have been studied in pure cultures or binary co-culture (St-Bl) in skim milk either containing 40Â mg/g of inulin or not. With inulin, the time required by St, Bl and St-Bl to complete fermentation (i.e., when the pH reached 4.5) was about 14, 8 and 49% shorter than without inulin, respectively. This prebiotic also enhanced the levels of lactic and acetic acids and volatile compounds, showing a positive synbiotic effect between pre- and probiotics. In particular, the St-Bl co-culture showed final concentrations of both microorganisms about 15 and 38% higher than in their respective pure cultures, thus highlighting a clear synergistic effect between these microorganisms due to mutual interactions. In addition, the well-known bifidogenic effect of inulin was confirmed.
⺠Pure cultures or binary co-cultures of S. thermophilus and B. lactis were studied. ⺠A synergistic interaction took place between S. thermophilus and B. lactis. ⺠Inulin enhanced volatile compounds. ⺠Inulin stimulated biomass growth and levels of lactic and acetic acids.
Journal: Food Research International - Volume 48, Issue 1, August 2012, Pages 21-27