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Horikawa, Daiki*; Yamaguchi, Ayami*; Sakashita, Tetsuya; Tanaka, Daisuke*; Hamada, Nobuyuki*; Yukuhiro, Fumiko*; Kuwahara, Hirokazu*; Kunieda, Takekazu*; Watanabe, Masahiko*; Nakahara, Yuichi*; et al.
Astrobiology, 12(4), p.283 - 289, 2012/04
Times Cited Count:23 Percentile:68.9(Astronomy & Astrophysics)We examined the hatchability of hydrated and anhydrobiotic eggs of the tardigrade to hatch after ionizing irradiation (helium ions), extremely low and high temperatures, and high vacuum. Anhydrobiotic eggs (50% lethal dose; 1690 Gy) were substantially more radioresistant than hydrated ones (50% lethal dose; 509 Gy). Anhydrobiotic eggs also have a broader temperature resistance compared with hydrated ones. Over 70% of the anhydrobiotic eggs treated at high and low temperatures, but all of the hydrated eggs failed to hatch. After exposure to high vacuum conditions, the hatchability of the anhydrobiotic eggs was comparable to that of untreated control eggs.
Horikawa, Daiki*; Sakashita, Tetsuya; Katagiri, Chihiro*; Watanabe, Masahiko*; Kikawada, Takahiro*; Nakahara, Yuichi*; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Higashi, Seigo*; et al.
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 116, 2007/02
no abstracts in English
Horikawa, Daiki*; Sakashita, Tetsuya; Katagiri, Chihiro*; Watanabe, Masahiko*; Kikawada, Takahiro*; Nakahara, Yuichi*; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Higashi, Seigo*; et al.
International Journal of Radiation Biology, 82(12), p.843 - 848, 2006/12
Times Cited Count:124 Percentile:99.11(Biology)no abstracts in English
Kuwabara, Mikinori*
PNC TJ4600 87-005, 41 Pages, 1987/03
None
Kuwabara, Mikinori*
PNC TJ5600 86-005, 33 Pages, 1986/03
The present experiments were made to get basic information about the utilization of radiation from nuclear waste glasses to decontamination of feed for a domestic aminal. First, the effects of X-irradiation on glucose were investigated by the method combining ESR and liquid chromatography.Second, radiation-induced degradation as well as the formation of cross-links were studied for protein with sulfur-containing amino acids. Third, to characterize the products formed by radiation- induced reactions between plasmid pBR.322 DNA and organic molecules were analyzed by the method combining enzymatic digestion and gel electrophoresis. Fourth, the effects of -irradiated whole diet on the growth of mice were tested by feeding and weighing them at regular intervals. Finally, pheophorbide, one of degradation products of chlorophyll in plants, were extracted from spinach. In the next project this will be subjected to study photodermatosis of a domestic animal.
Horikawa, Daiki*; Watanabe, Masahiko*; Nakahara, Yuichi*; Kikawada, Takahiro*; Okuda, Takashi*; Sakashita, Tetsuya; Funayama, Tomoo; Hamada, Nobuyuki*; Wada, Seiichi*; Kobayashi, Yasuhiko; et al.
no journal, ,
no abstracts in English
Horikawa, Daiki*; Sakashita, Tetsuya; Katagiri, Chihiro*; Watanabe, Masahiko*; Nakahara, Yuichi*; Kikawada, Takahiro*; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Higashi, Seigo*; et al.
no journal, ,
no abstracts in English