期刊
FOOD RESEARCH INTERNATIONAL
卷 48, 期 1, 页码 21-27出版社
ELSEVIER
DOI: 10.1016/j.foodres.2012.02.012
关键词
Inulin; Streptococcus thermophilus; Bifidobacterium lactis; Biomass; Metabolic end-products
资金
- FAPESP (Sao Paulo State Research Foundation)
- CAPES (Coordination of Improvement of Higher Education)
The organic acids profile, sugar metabolism and biomass growth of Streptococcus thermophilus (St) and Bifidobacterium lactis (BI) have been studied in pure cultures or binary co-culture (St-BI) in skim milk either containing 40 mg/g of inulin or not. With inulin, the time required by St. BI and St-BI 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-BI 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. (c) 2012 Elsevier Ltd. All rights reserved.
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