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  • Title: Use of gases to improve survival of Bifidobacterium bifidum by modifying redox potential in fermented milk.
    Author: Ebel B, Martin F, Le LD, Gervais P, Cachon R.
    Journal: J Dairy Sci; 2011 May; 94(5):2185-91. PubMed ID: 21524508.
    Abstract:
    The aim of this work was to study the effect of the oxidoreduction potential, modified using gas, on the growth and survival of a probiotic strain, Bifidobacterium bifidum, and 2 yogurt strains, Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus. Three fermented milks were manufactured with an initial oxidoreduction potential value adjusted to +440 mV (control milk), +350 mV (milk gassed with N(2)), and -300 mV [milk gassed with N(2) plus 4% (vol/vol) H(2) (N(2)-H(2))]. Acidification profiles, growth during milk fermentation and survival during storage at 4 °C for 28 d were determined. This study showed that fermented probiotic dairy products made from milk gassed with N(2) and, more particularly, those made from milk gassed with N(2)H(2) were characterized by a significant increase in B. bifidum survival during storage without affecting the fermentation kinetics and the survival of Strep. thermophilus and L. delbrueckii ssp. bulgaricus.
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