Effects of Inulin and Oligofructose levels on survival of probiotic bacteria and sensory properties in synbiotic Doogh

AbstractThe use of probiotic Doogh as one of the probiotic dairy products has become popular in Iran. Afterwards, adding probiotic bacteria and maintain their viability in Doogh can contribute in promoting consumers health. The purpose of current research was to deliberate the influences of inulin (۱%, ۲% and ۳%w/w), oligofructose (۱%, ۲% and ۳%w/w) and inulin- oligofructose (at a levels of ۱-۱%, ۲-۲% and ۳-۳% w/w) as a prebiotic components in comparison to control sample (without prebiotic) along with bacteria incorporated with Bifidobacterium lactis and Lactobacillus acidophilus as starter (۱%) to manufacture synbiotic Doogh and to evaluate the physicochemical and sensorial properties, and the viable numbers of probiotic bacteria in the Doogh within storage period. SNF, Bif. lactis and L. acidophilus bacteria count and sensorial characteristics (taste and flavor attributes) were statistically (at the ۹۵% level) different across the treatments. Further, Doogh containing ۱% inulin and ۱% oligofructose, were associated to the maximal and minimal viability of L. acidophilus on ۲۱th storage day, respectively. Doogh including ۲% inulin and control also, were related to the maximal and minimal viability of Bif. lactis, respectively. Overall, the results showed that using inulin and oligofructose could be produced a synbiotic Doogh containing probiotic bacteria with improved survival as a functional dairy drink.Keywords: Doogh, Inulin, Oligofructose, Probiotic bacteriaKeywords: Doogh, Inulin, Oligofructose, Probiotic bacteriaKeywords: Doogh, Inulin, Oligofructose, Probiotic bacteriaKeywords: Doogh, Inulin, Oligofructose, Probiotic bacteria

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Keywords: Doogh ، Inulin ، Oligofructose ، probiotic bacteria