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  • Küçük Resim
    Öğe
    Design of probiotic dry fermented sausage (sucuk) production with microencapsulated and free cells of lactobacillus rhamnosus
    (2017) Ünal Turhan, Emel; Erginkaya, Zerrin; Polat, Süleyman; Özer, Emir Ayşe
    The present study was performed to design sucuk production with microencapsulated and free cells of Lactobacillus rhamnosusand to investigate the effect of this production method on probiotic viability and quality characteristics on the final product. L. rhamnosus was microencapsulated with an optimal coating material combination by using response surface methodology and subsequently used in sucuk production as a probiotic culture. Microencapsulation protected L. rhamnosus against gastric and other stress conditions in sucuk composition. Sucuk production with microencapsulated L. rhamnosus was found to be similar to traditional sucuk in terms of textural, physicochemical, and sensorial properties. Novel sucuk production was developed with the use of free or microencapsulated probiotics. The addition of probiotics to the sucuk promoted the health benefits associated with lactic acid bacteria and contributed to an increase in the consumption of such products. In summary, the results of this study can provide data to the meat industry for the possible utilization of microencapsulated or free probiotics in sucuk processing as demanded by conscientious consumers.
  • Küçük Resim
    Öğe
    Inactivation Effect of Probiotic Biofilms on Growth of Listeria monocytogenes
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2017) Unal Turhan, Emel; Erginkaya, Zerrin; Uney, Melek Hatice; Ozer, Emir Ayse
    Probiotic lactic acid bacteria and their biofilms have antagonistic activity against food spoilage organisms and pathogenic bacteria. Recently, researchers focused on the use of probiotic biofilms for inhibition of pathogenic bacteria. The aim of this research is to improve probiotic biofilms with optimal prebiotic concentration and to determine their inactivation effect on both planktonic cells and biofilm growth of Listeria monocytogenes. Biofilm formations were detected by using microplate method. Prebiotic ingredients were used to form biofilm with highest viable probiotic cell counts and optimal concentrations of prebiotic ingredients were determined according to the response surface method. Biofilm produced by Lactobacillus casei Shirota and Lactobacillus rhamnosus contained 9.46 and 9.66 log cfu/mL viable cell counts, respectively. Optimal prebiotic concentrations were found 3% casein peptone-0% fructo-oligosaccharides (FOS) for biofilm formation with highest viable cell counts by L. casei Shirota and 1.5% casein peptone-1.5% FOS for biofilm formation with highest viable cell counts by L. rhamnosus. Probiotic biofilms exhibited inactivation against growth of L. monocytogenes and caused a reduction of 0.66-2.01 log cfu/mL for planktonic L. monocytogenes and 0.40-1.69 log cfu/ml for L. monocytogenes biofilm. Planktonic cells of L. monocytogenes were observed to be more susceptible to probiotic biofilms than biofilm of L. monocytogenes. Biofilm of L. rhamnosus showed higher inhibition effect on L. monocytogenes growth than L. casei Shirota. These findings showed that biofilms of probiotic Lactobacillus strains used in this study may be excellent candidate for controlling of pathogenic bacteria.