ID 111322
Author
Gadelmoula, Mostafa The University of Tokushima
Lian, Xin The University of Tokushima|Japan Science and Technology Agency
Maeda, Miku The University of Tokushima
Aihara, Mutsumi The University of Tokushima|Japan Science and Technology Agency Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Hamamoto, Akiko The University of Tokushima
Harada, Yumi The University of Tokushima
Yamato, Masayuki The University of Tokushima
Keywords
airborne pathogens
air disinfection
ultraviolet germicidal irradiation (UVGI)
ultraviolet light emitting diodes (UV-LED)
Content Type
Journal Article
Description
We previously developed a high powered light-emitting diode device capable of discharging germicidal ultraviolet irradiation (UVA-LED) at an approximate wavelength of 365 nm. This study examined the bactericidal activity of UVA-LED in moving air streams. Aerosols of Escherichia coli DH5α were exposed to UVA-LED irradiation using a stable current (0.5 A and 1.2 mW/cm2) or pulse current (1.0 A and 0.2 mW/cm2). Settle plate analysis was used for bioaerosol sampling, where results were expressed as Colony Forming Units. A-3 Log inactivation of the E. coli population occurred after 75 minutes of constant exposure to stable current. The pulse current produced inactivation within a similar timeframe. Our results might be significant as a basic study for further investigations about the effect of UVA-LED on airborne bacteria and its suitability for air disinfection applications.
Journal Title
The Journal of Medical Investigation
ISSN
13496867
13431420
NCID
AA11166929
AA12022913
Publisher
Faculty of Medicine Tokushima University
Volume
56
Issue
3-4
Start Page
150
End Page
156
Sort Key
150
Published Date
2009-08
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Bioscience and Bioindustry
Medical Sciences
Science and Technology