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中圧紫外線の微生物不活化と光・暗回復
https://az.repo.nii.ac.jp/records/4859
https://az.repo.nii.ac.jp/records/4859f0a5030e-841c-49ba-9e7c-1ae56bdafb5a
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2005-01-01 | |||||
タイトル | ||||||
タイトル | 中圧紫外線の微生物不活化と光・暗回復 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | DNA lesions, photoreactivation and dark repair of medium pressure ultraviolet irradiated microorganisms | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
記事種別 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 特集 | |||||
Type | ||||||
内容記述タイプ | Other | |||||
内容記述 | FEATURE ARTICLES | |||||
著者 |
森田, 重光
× 森田, 重光× Morita, Shigemitsu |
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所属機関 | ||||||
麻布大学大学院環境保健学研究科 | ||||||
Institution or Company | ||||||
Graduate school of environmental health, Azabu university | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 本研究では芽胞を形成するB. subtilisにLPUVおよびMPUVを照射して,不活化力およびESS生成数を定量的に評価した。その結果,以下に示す知見が得られた。1)LPUVとMPUVの単位線量当たりのB. subtilis不活化力およびESS生成数はほぼ同じであった。2)紫外線照射したB. subtilis の ESS数およびCFAは光・暗回復するが,回復速度はE. coliなどの芽胞を形成しないほかの細菌と比べて遅かった。3)E. co1iで見られたMPUV照射による回復抑制効果はB. subtilisでは認められなかった。 | |||||
Abstract | ||||||
内容記述タイプ | Other | |||||
内容記述 | Some microorganisms are known to possess the ability to repair the DNA lesion by mechanisms such as photoreactivation and dark repair. However, the ability of spore formed microorganisms to perform photoreactivation and dark repair has not been clarified yet in spite of the importance of these phenomena. In previous study, the photoreactivation and dark repair of E. coli were investigated by an endonuclease sensitive site (ESS) assay, which can determine the number of ultraviolet induced pyrimidine dimers in the genomic DNA. Then, in this study, Photoreactivation of Bucillus subtilis spore subsequent to an inactivation by low-pressure or medium-pressure UV lamps was investigated. An endonuclease sensitive site (ESS) assay was applied to determine UV-induced pyrimidine dimers in the genomic DNA of B. subtilis, while a conventional cultivation assay was also used to investigate the colony forming ability (CFA) of B. subtilis. The UV-induced pyrimidine dimers were gradually repaired as the exposure time to fluorescent light increased. Approximately 10% of the ESS were reduced after fluorescent light irradiation at a dose of 540 mJ/cm^2. After photoreactivation, finally achieved inactivation of the CFA ratio of B. subtilis was 1.5 log_<10> subsequent to a 2 log_<10> inactivation by LP or MP lamp. The UV-induced pyrimidine dimers were gradually repaired during storage in the dark. Nonetheless, the number of ESS decreased more slowly in the latter than during the photoreactivation process. Approximately 95% of the ESS were reduced after storage in the dark for 48 hours, indicating B. subtilis has the ability to repair the pyrimidine dimers in the genomic DNA during either exposure to fluorescent light or storage in the dark. | |||||
書誌情報 |
麻布大学雑誌 en : Journal of Azabu University 巻 11/12, p. 199-202, 発行日 2006-03-31 |
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出版者 | ||||||
出版者 | 麻布大学 | |||||
Publisher | ||||||
出版者 | Azabu University | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1346-5880 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11561468 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
text version | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
format | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf |