Sterilization effect of UV light on Bacillus spores using TiO2 films depends on wavelength

Nhung, Le Thi Tuyet; Nagata, Hirofumi; Takahashi, Akira; Aihara, Mutsumi; Okamoto, Toshihiro; Shimohata, Takaaki; Mawatari, Kazuaki; Akutagawa, Masatake; Kinouchi, Yohsuke; Haraguchi, Masanobu

doi:10.2152/jmi.59.53

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Use this link to cite this item : https://repo.lib.tokushima-u.ac.jp/106002

ID	106002
Author	Nhung, Le Thi Tuyet Department of Preventive Environment and Nutrition, Institute of Health Biosciences, the University of Tokushima Graduate School Nagata, Hirofumi Department of Optical Science and Technology, Institute of Socio Techno Sciences, the University of Tokushima Graduate School Takahashi, Akira Department of Preventive Environment and Nutrition, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers Aihara, Mutsumi Department of Preventive Environment and Nutrition, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers Okamoto, Toshihiro Department of Optical Science and Technology, Institute of Socio Techno Sciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers Shimohata, Takaaki Department of Preventive Environment and Nutrition, Institute of Health Biosciences, the University of Tokushima Graduate School KAKEN Search Researchers Mawatari, Kazuaki Department of Preventive Environment and Nutrition, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers Akutagawa, Masatake Department of Electrical and Electronic Engineering, Institute of Socio Techno Sciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers Kinouchi, Yohsuke Department of Electrical and Electronic Engineering, Institute of Socio Techno Sciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers Haraguchi, Masanobu Department of Optical Science and Technology, Institute of Socio Techno Sciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Keywords	disinfection Bacillus spore UV light photocatalytic
Content Type	Journal Article
Description	UV light and photocatalysts such as titanium dioxide (TiO2) and silver (Ag) are useful for disinfection of water and surfaces. However, the effect of UV wavelength on photocatalytic disinfection of spores is not well understood. Inactivation of Bacillus spores has been examined using different UV wavelengths and TiO2 or TiO2/Ag composite materials. The level of UVA disinfection of Bacillus anthracis and Bacillus brevis vegetative cells increased with the presence of the TiO2 and Ag photocatalysts, but had little effect on their spores. B. brevis spores were slightly more sensitive to UVB and UVC than the spores of B. atrophaeus. Photocatalytic sterilization against spores was strongest in UVC and UVB and weakest in UVA. The rate of inactivation of Bacillus spores was significantly increased by the presence of TiO2, but was not markedly different from that induced by the presence of Ag. Therefore, TiO2/Ag plus UVA can be used for the sterilization of vegetative cells, while TiO2 and UVC are effective against spores.
Journal Title	The journal of medical investigation : JMI
ISSN	13431420
NCID	AA11166929
Volume	59
Issue	1-2
Start Page	53
End Page	58
Sort Key	53
Published Date	2012-02
Remark	P.53の著者の英語表記に誤植（誤）Yhosuke（正）Yohsuke
EDB ID	251590
DOI (Published Version)	10.2152/jmi.59.53
URL ( Publisher's Version )	https://doi.org/10.2152/jmi.59.53
FullText File	LID201402042001.pdf 455 KB
language	eng
TextVersion	Publisher
departments	Science and Technology Medical Sciences Bioscience and Bioindustry