title: 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 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.
authors.affiliation: Laboratoire de Génie des Procédés Microbiologiques et Alimentaires, AgroSup Dijon, Université de Bourgogne, site INRA, 17 Rue Sully, 21065 Dijon, France.
authors.forename: B
authors.initials: B
authors.lastname: Ebel
authors.forename: F
authors.initials: F
authors.lastname: Martin
authors.forename: L D T
authors.initials: LD
authors.lastname: Le
authors.forename: P
authors.initials: P
authors.lastname: Gervais
authors.forename: R
authors.initials: R
authors.lastname: Cachon
mesh_terms: D000818:Animals; D001644:Bifidobacterium / Q000254:growth & development*; D043302:Cultured Milk Products / Q000382:microbiology*; D005285:Fermentation / Q000187:drug effects; D005511:Food Handling / Q000379:methods; D005516:Food Microbiology; D005519:Food Preservation; D006859:Hydrogen / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D048668:Lactobacillus delbrueckii / Q000254:growth & development; D009584:Nitrogen / Q000494:pharmacology*; D010084:Oxidation-Reduction / Q000187:drug effects; D048249:Streptococcus thermophilus / Q000254:growth & development
chemical_list: D006859:Hydrogen; D009584:Nitrogen