| Suitability of ultraviolet (A)-light emitting diode for air stream disinfection. | |
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MedLine Citation:
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PMID: 19763028 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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 DH5alpha were exposed to UVA-LED irradiation using a stable current (0.5 A and 1.2 mW/cm(2)) or pulse current (1.0 A and 0.2 mW/cm(2)). 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. |
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Authors:
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Mostafa Gadelmoula; Xin Lian; Miku Maeda; Mutsumi Aihara; Kazuaki Mawatari; Akiko Hamamoto; Yumi Harada; Masayuki Yamato; Masatake Akutagawa; Yutaka Nakaya; Yohsuke Kinouchi; Akira Takahashi |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The journal of medical investigation : JMI Volume: 56 ISSN: 1349-6867 ISO Abbreviation: J. Med. Invest. Publication Date: 2009 Aug |
Date Detail:
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Created Date: 2009-09-18 Completed Date: 2009-12-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9716841 Medline TA: J Med Invest Country: Japan |
Other Details:
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Languages: eng Pagination: 150-6 Citation Subset: IM |
Affiliation:
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Department of Preventive Environment and Nutrition, Institute of Health Biosciences, the University of Tokushima Graduate School, Tokushima, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerosols Air Microbiology* Air Pollution, Indoor Disinfection / instrumentation* Escherichia coli / radiation effects Humans Sick Building Syndrome / microbiology, prevention & control Ultraviolet Rays* |
| Chemical | |
Reg. No./Substance:
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0/Aerosols |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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