Application of gamma radiation for disinfection of fungi in a large volume of historical archives damaged by flood following Typhoon Hagibis 2019, Japan: A case report
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- LINH NGUYEN THI THUY
- Department of Quantum and Radiation Technology, Graduate School of Engineering, Osaka Prefecture University Faculty of Biology, Dalat University
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- KUMEDA YUKO
- Research Center of Microorganism Control, Organization for Research Promotion, Osaka Prefecture University Center for Fungal Consultation
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- MATSUSHITA MASAKAZU
- Kobe University
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- HIRONIWA TAKAYUKI
- Koga Isotope Ltd.
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- FURUTA MASAKAZU
- Department of Quantum and Radiation Technology, Graduate School of Engineering, Osaka Prefecture University Research Center of Microorganism Control, Organization for Research Promotion, Osaka Prefecture University
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抄録
A large volume of historical archives was extensively damaged by flood water, following Typhoon Hagibis in Fukushima, Japan, in October 2019. They were rescued from the stricken area within a week, however, the prolonged exposure of paper documents to water caused severe biodegradation by fungal growth. To disinfect fungi, the paper documents were exposed to gamma radiations emitted by a source of Cobalt 60 by the industrial irradiation service. The wet paper documents were mainly contaminated with hydrophilic and cellulolytic fungi, including Trichoderma, Stachybotrys, and Fusarium; no fungi grew after irradiation. These results indicated that the average absorbed dosage from 13.1 kGy to 16.1 kGy were sufficient to disinfect paper documents heavily contaminated with fungi. In the present study, we demonstrated the successful practical use of irradiation in fungi-damaged paper documents using a commercial gamma-irradiation facility.
収録刊行物
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- Ｂｉｏｃｏｎｔｒｏｌ Ｓｃｉｅｎｃｅ
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Ｂｉｏｃｏｎｔｒｏｌ Ｓｃｉｅｎｃｅ 26 (1), 55-59, 2021
日本防菌防黴学会
