Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper

In this study, we investigated the effect of gamma irradiation on fungal growth and mechanical properties of the traditional Japanese paper, Kohzo-gami, infected by mesophilic fungi such as Aspergillus sydowii, Penicillium chrysogenum, and Cladosporium cladosporioides. The radiation sensitivities of...

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Những tác giả chính:	Nguyễn, Thị Thùy Linh, Yuko Kumeda, Masakazu Matsushita, Masashi Amano, Koichi Sakai, Keita Yoshikawa, Kazuhisa Fujita, Toshihide Uchida, Masakazu Furuta
Định dạng:	Journal article
Ngôn ngữ:	English
Được phát hành:	Elsevier B.V. 2021
Những chủ đề:	Gamma irradiation Japanese paper Fungal contamination Conidium Mycelium
Truy cập trực tuyến:	http://scholar.dlu.edu.vn/handle/123456789/589
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Thư viện lưu trữ:	Thư viện Trường Đại học Đà Lạt

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spelling	oai:scholar.dlu.edu.vn:123456789-5892022-08-03T23:42:37Z Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper Nguyễn, Thị Thùy Linh Yuko Kumeda Masakazu Matsushita Masashi Amano Koichi Sakai Keita Yoshikawa Kazuhisa Fujita Toshihide Uchida Masakazu Furuta Gamma irradiation Japanese paper Fungal contamination Conidium Mycelium In this study, we investigated the effect of gamma irradiation on fungal growth and mechanical properties of the traditional Japanese paper, Kohzo-gami, infected by mesophilic fungi such as Aspergillus sydowii, Penicillium chrysogenum, and Cladosporium cladosporioides. The radiation sensitivities of dormant conidium-, germinating conidium-, and mycelium-contaminated wet and dry paper were also determined. A radiation dose capable of inactivating 50% of a 30-sample population was used for comparison. Our results showed that the 50% inactivation dose did not significantly differ between wet and dry dormant conidia. However, the survival percentage of dry dormant conidia was higher than that of wet dormant conidia at a high radiation dose. In contrast, the 50% inactivation doses for dry germinating conidia and dry mycelia were significantly lower than those for wet germinating conidia and wet mycelia, respectively. These results indicate that drought stress increased the radiation sensitivity of germinating conidia and mycelia. We also investigated the mechanical properties of Kohzo-gami irradiated at different doses. The order of the tensile strength of Kohzo-gami relative to that of control samples was as follows: 10 kGy > 30 kGy > 40 kGy. This result suggests that even a 10 kGy radiation dose can affect the mechanical properties of paper. The color change level of Kohzo-gami increased significantly at all doses; however, the National Bureau of Standards rating showed only “slight change” at all doses. The radiation doses required for fungal disinfection varied considerably depending on the fungal species and the total number of fungal cells on contaminated paper. Therefore, it was difficult to determine the standard exposure dose for treatment. However, paper sterilization might not be required, as a combination of low-dose radiation and dryness can effectively kill fungal mycelia on contaminated paper. 46 148-154 2021-09-23T09:32:00Z 2021-09-23T09:32:00Z 2020-11 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter http://scholar.dlu.edu.vn/handle/123456789/589 en Journal of Cultural Heritage 10.1016/j.culher.2020.07.007 1296-2074 Elsevier B.V.
institution	Thư viện Trường Đại học Đà Lạt
collection	Thư viện số
language	English
topic	Gamma irradiation Japanese paper Fungal contamination Conidium Mycelium
spellingShingle	Gamma irradiation Japanese paper Fungal contamination Conidium Mycelium Nguyễn, Thị Thùy Linh Yuko Kumeda Masakazu Matsushita Masashi Amano Koichi Sakai Keita Yoshikawa Kazuhisa Fujita Toshihide Uchida Masakazu Furuta Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper
description	In this study, we investigated the effect of gamma irradiation on fungal growth and mechanical properties of the traditional Japanese paper, Kohzo-gami, infected by mesophilic fungi such as Aspergillus sydowii, Penicillium chrysogenum, and Cladosporium cladosporioides. The radiation sensitivities of dormant conidium-, germinating conidium-, and mycelium-contaminated wet and dry paper were also determined. A radiation dose capable of inactivating 50% of a 30-sample population was used for comparison. Our results showed that the 50% inactivation dose did not significantly differ between wet and dry dormant conidia. However, the survival percentage of dry dormant conidia was higher than that of wet dormant conidia at a high radiation dose. In contrast, the 50% inactivation doses for dry germinating conidia and dry mycelia were significantly lower than those for wet germinating conidia and wet mycelia, respectively. These results indicate that drought stress increased the radiation sensitivity of germinating conidia and mycelia. We also investigated the mechanical properties of Kohzo-gami irradiated at different doses. The order of the tensile strength of Kohzo-gami relative to that of control samples was as follows: 10 kGy > 30 kGy > 40 kGy. This result suggests that even a 10 kGy radiation dose can affect the mechanical properties of paper. The color change level of Kohzo-gami increased significantly at all doses; however, the National Bureau of Standards rating showed only “slight change” at all doses. The radiation doses required for fungal disinfection varied considerably depending on the fungal species and the total number of fungal cells on contaminated paper. Therefore, it was difficult to determine the standard exposure dose for treatment. However, paper sterilization might not be required, as a combination of low-dose radiation and dryness can effectively kill fungal mycelia on contaminated paper.
format	Journal article
author	Nguyễn, Thị Thùy Linh Yuko Kumeda Masakazu Matsushita Masashi Amano Koichi Sakai Keita Yoshikawa Kazuhisa Fujita Toshihide Uchida Masakazu Furuta
author_facet	Nguyễn, Thị Thùy Linh Yuko Kumeda Masakazu Matsushita Masashi Amano Koichi Sakai Keita Yoshikawa Kazuhisa Fujita Toshihide Uchida Masakazu Furuta
author_sort	Nguyễn, Thị Thùy Linh
title	Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper
title_short	Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper
title_full	Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper
title_fullStr	Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper
title_full_unstemmed	Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper
title_sort	effect of gamma radiation on fungal growth stages and mechanical properties of traditional japanese paper
publisher	Elsevier B.V.
publishDate	2021
url	http://scholar.dlu.edu.vn/handle/123456789/589
_version_	1768305798819086336

Effect of gamma radiation on fungal growth stages and mechanical properties of traditional Japanese paper

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