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http://dx.doi.org/10.5352/JLS.2005.15.5.749

Identification and Cultural Characterization of Antioxidant Producing Bacteria Isolated from the Jeju Coasts  

Kim Man-Chul (Faculty of marine science, Cheju National Uiversity)
Heo Moon-Soo (Faculty of marine science, Cheju National Uiversity)
Publication Information
Journal of Life Science / v.15, no.5, 2005 , pp. 749-754 More about this Journal
Abstract
An antioxidant- producing bacterium was isolated from sea water in Jeju island. The isolated strain, SC2-1 was gram-positive, catalase positive, facultatively anaerobic, oxidase negative, motile and small rods. The strain utilized sucrose, dextrose, fructose, mannitol and maltose as a sole carbon and energy source and sodium chloride was required for the bacteria growth. The radical scavenging activity of the culture supernatants was determined by DPPH (1,1-diphenyl-2-picrylhydrazyl) method. This bacterium was identified based on cellular fatty acids analysis and 16S rDNA sequencing, and then named Exiguobacterium sp. SC2-1. The modified optimal medium compositions required the addition of maltose $2.5\%(w/v)$, yeast extract $1.5\%(w/v)$ and $KH_{2} PO_{4} 0.05\%(w/v)$ in marine broth (Difco. Co. USA). Antioxidant activity of under optimal culture conditions were $93\%$.
Keywords
radical scavenging activity; DPPH; Exiguobacterium sp.; 16S rDNA; antioxidant;
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