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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/97977

    Title: Exopolysaccharides and Antimicrobial Biosurfactants Produced by Paenibacillus macerans TKU029
    Authors: Liang, Tzu-Wen;Wu, Chia-Chen;Cheng, Wei-Ting;Chen, Yu-Chi;Wang, Chuan-Lu;Wang, I-Li;Wang, San-Lang
    Contributors: 淡江大學化學學系
    Keywords: Paenibacillus macerans;Exopolysaccharides;Biosurfactant;Antimicrobial activity;Skin hydration;Squid pen
    Date: 2014-01-01
    Issue Date: 2014-05-15 14:52:50 (UTC+8)
    Publisher: Totowa: Humana Press, Inc.
    Abstract: Paenibacillus macerans TKU029 can produce exopolysaccharides (EPSs; 3.46 g/L) and a biosurfactant (1.78 g/L) in a medium with 2 % (w/v) squid pen powder as the sole carbon/nitrogen source. The biosurfactant can reduce the surface tension of water from 72.30 to 35.34 mN/m at a concentration of 2.76 g/L and reach an emulsification index of 56 % after a 24-h reaction with machine oil. This biosurfactant is stable at 121 °C for 20 min, over a pH range from 3 to 11, and in <5 % salt solutions. It also shows significant antimicrobial activity, which remains active after treatment at 121 °C and at pH values from 4 to 10, against Escherichia coli BCRC13086, Staphylococcus aureus BCRC10780, Fusarium oxysporum BCRC32121 and Aspergillus fumigatus BCRC30099. Furthermore, human skin shows from 37.3 to 44.3 % hydration after being treated with TKU029 EPSs for 180 min. These results imply that EPSs and the biosurfactant from this strain have potential in cosmetics, for removal of oil contamination, and as antimicrobial agents.
    Relation: Applied Biochemistry and Biotechnology 172(2), pp.933-950
    DOI: 10.1007/s12010-013-0568-5
    Appears in Collections:[Graduate Institute & Department of Chemistry] Journal Article

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