Prevention of Phormidium tenue Biofilm Formation by TiO_2 Photocatalysis
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概要
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We showed that the photocatalytic effect of a coating of TiO2 greatly reduces the formation of a biofilm by Phormidium tenue (P. tenue), a filamentous cyanobacterium, on glass plates. Sample plates were immersed in P. tenue culture solution (OD730=0.3) under concurrent illumination with white fluorescent (WF) and UV light (0.3 mW cm-2, each) for 11 days. TiO2-coated glass plates showed greatly reduced adhesion of P. tenue over 11 days compared to bare plates. The number of P. tenue adhering to bare glass plates increased to over 106 cells cm-2 in 6 days. The photocatalytic anti-biofilm effect was also observed under WF light, although it was small and lasted only a few days. The addition of 1 mM mannitol, a scavenger for the hydroxyl radical (·OH), suppressed the effect. The surface of TiO2-coated plates was maintained in a highly hydrophilic state for 11 days, regardless of the addition of mannitol. Therefore, we conclude that the photocatalytic oxidation of P. tenue is effective in preventing the formation of a biofilm.
- 2009-09-01
著者
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福田 朱里
筑波大学生命環境科学研究科
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Yang Yingnan
Research Institute For Environmental Management Technology National Institute Of Advanced Industrial
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Sugiura Norio
Graduate School Of Life And Environmental Sciences Univ. Of Tsukuba
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Sugiura Norio
Graduate School Of Life And Environmental Sciences University Of Tsukuba
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Fukuda Akari
Research Institute For Environmental Management Technology National Institute Of Advanced Industrial
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OHKO YOSHIHISA
Research Institute for Environmental Management Technology, National Institute of Advanced Industria
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NAGAO YASUHIKO
College of Agrobiological Resource Sciences, University of Tsukuba
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OKANO KUNIHIRO
Graduate School of Life and Environmental Sciences, University of Tsukuba
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NEGISHI NOBUAKI
Research Institute for Environmental Management Technology, National Institute of Advanced Industria
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TAKEUCHI MIO
Research Institute for Geo-Resource and Environment, AIST
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HANADA SATOSHI
Research Institute for Biological Resources and Functions, AIST
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Negishi Nobuaki
Research Institute For Environmental Management Technology National Institute Of Advanced Industrial
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Hanada Satoshi
Research Institute For Biological Resources And Functions Aist
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Takeuchi Mio
Research Institute For Geo-resource And Environment Aist
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Nagao Yasuhiko
College Of Agrobiological Resource Sciences University Of Tsukuba
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Ohko Yoshihisa
Research Institute For Environmental Management Technology National Institute Of Advanced Industrial
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Okano Kunihiro
Graduate School Of Life And Environmental Sciences University Of Tsukuba
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Sugiura Norio
Graduate School of Life and Environmental Sciences, University of Tsukuba
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Okano Kunihiro
Graduate School of Bioresource Science, Akita Prefectural University
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