Generation of reactive oxygen species from Hinokitiol under near-UV irradiation |
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Authors: | Shibata Hitoshi Nagamine Takayuki Wang Yong Ishikawa Takahiro Sawa Yoshihiro |
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Affiliation: | Department of Life Science and Biotechnology, Faculty of Life and Environmental Science, Shimane University, Matsue, Japan. shibata@life.shimane-u.ac.jp |
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Abstract: | Near-UV irradiation caused the decomposition of hinokitiol in an aqueous solution. During the photochemical reaction, the distinct electron spin resonance signal characteristic of the adduct of 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) with the hydroxyl radical was accompanied by small signals corresponding to the adduct of DMPO with the superoxide anion radical. More than 95% of Escherichia coli cells were killed by the incubation with hinokitiol under near-UV irradiation by BLB fluorescent lamps. These results indicated the generation of reactive oxygen species during photochemical reaction of hinokitiol under near-UV irradiation. |
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