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    Determination of Metabolic and Antimicrobial Activities of Lactobacillus plantarum Strains Isolated from Traditional Fermented Pickles
    (Selçuk Üniversitesi, 2015) Alan, Yusuf; Erbil, Nurcan; Digrak, Metin
    Lactobacillus species are more effective on the maturation of pickles. In this study, acid and H2O2 rates which were made by 22 strains of Lactobacillus plantarum izolated from tradional pickles were 0.48-0.87% and 0.77-2.68 µg mL-1. General inhibition activities of strains and inhibition activities of bacteriocin and/or materials such like bacteriocin were determined by agar diffusion method, against test microorganisms. The plasmid profiles of Lactobacillus plantarum were determined. It was observed that Lactobacillus plantarum strains were produced bacteriocin or inhibitor material such like bacteriocin and these materials affected to some test microorganisms. Additionally it was determined that L. plantarum strains produced various metabolic products at different rates and they showed inhibitory affect at different rates against test microorganisms.
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    In vivo antimicrobial activity of Rheum ribes ekstracts obtained from various plant parts from Turkey
    (Selçuk Üniversitesi, 2012) Alan, Yusuf; Erbil, Nurcan; Digrak, Metin
    Different parts of Rheum ribes (ışgın) used as medicinal herb in several place of Turkey were extracted with five different organic solvent such as chlorophorm, hexane, acetone, ethanol, and methanol. Antimicrobial activities of these extracts were tested against test microorganisms. Consequently none of extract of leaf did not effect test microorganisms. Methanol and ethanol extracts obtained from root, stalk, and seed of Rheum ribes exhibited antimicrobial activity against test microorganisms at various rate. Furthermore, it was determinated that the most sensitive microosganisms among test microorganisms were Bacillus subtilis ATCC 6633 and Enterobacter aerogenes ATCC 13048.