Biotechnology and Bioprocess Engineering:BBE

The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Screening of Antioxidative Activity of Bifidobacterium Species Isolated from Korean Infant Feces and Their Identification

  • Kim, Ji-Youn (Department of Biological Engineering, Inha University) ;
  • Park, Soo-Im (Department of Biological Engineering, Inha University) ;
  • Heo, Tae-Ryeon (Department of Biological Engineering, Inha University)
  • Published : 2003.06.01
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Abstract

Among 59 Korean isolated, 20 were confirmed as members of the genus Bifidobaferium species based on gram staining, microscopic examination of cell morphology and the TLC method, The oxygen tolerance and antioxidative activities of these 20 Bifidobacterium strains and 5 standard Bifidobaferium strains were tested. All the strains demonstrated antioxidative activities as regards inhibiting linoleic acid peroxidation. The antioxidative activities of isolated and standard strains were found to range from 10.7-46.4% and from 10.7-22.2%, respectively. In addition, all tested strains exhibited a Scavenging ability on DPPH free radicals, range from 15-41% for the isolated strains and 8.3-22% for the standard strain. Accordingly. the isolated Bifidobarterium strains demonstrated higher antioxidative artivities than the 5 standa rd Bifidobarterium strains. On the base of grades for each test, HJL 7511 was identified 35 the best strain, followed by HJL 7501. 2 strains were identified with Polymerase Chain Reaction (PCR) assay using group-specific primers designed from the nucleotide Sequences of the 16S rRNA and internal transcribed spacer (ITS) regions of the Bifidobacteria. Based on the Sequencing results, HJL 7511 and HJL 7501 were identified as Bifidobacterium infantis.

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