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Use of gases to improve survival of Bifidobacterium bifidum by modifying redox potential in fermented milk

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 N2), and −300 mV [milk gassed with N2 plus 4% (vol/vol) H2 (N2-H2)]. 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 N2 and, more particularly, those made from milk gassed with N2H2 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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Submitted on : Thursday, January 9, 2020 - 4:50:35 PM
Last modification on : Saturday, May 30, 2020 - 3:39:41 AM

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Bruno Ebel, Florence Martin-Dejardin, Doan Thanh Lam Le, Patrick Gervais, Rémy Cachon. Use of gases to improve survival of Bifidobacterium bifidum by modifying redox potential in fermented milk. Journal of Dairy Science, American Dairy Science Association, 2011, 94 (5), pp.2185-2191. ⟨10.3168/jds.2010-3850⟩. ⟨hal-02434110⟩

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