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Journal Articles

Observation of morphological abnormalities in silkworm pupae after feeding $$^{137}$$CsCl-supplemented diet to evaluate the effects of low dose-rate exposure

Tanaka, Sota; Kinouchi, Tadatoshi*; Fujii, Tsuguru*; Imanaka, Tetsuji*; Takahashi, Tomoyuki*; Fukutani, Satoshi*; Maki, Daisuke*; Notomi, Akihiro*; Takahashi, Sentaro*

Scientific Reports (Internet), 10, p.16055_1 - 16055_7, 2020/09

 Times Cited Count:0 Percentile:100(Multidisciplinary Sciences)

Since the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, morphological abnormalities of the lepidopteran insects have been reported. However, it is unclear whether the abnormalities were caused directly by radiation because they did not study on absorbed dose and dose-effect relationship. In this study, we conducted an internal exposure experiment on silkworm using $$^{137}$$CsCl-supplemented artificial diet and estimated the absorbed dose to evaluate the morphological abnormalities in silkworm. The ratio of wing to whole body of pupae was compared between the $$^{137}$$CsCl-exposured and control groups and no significant differences were observed between the groups. This result suggest that morphological abnormalities in lepidopterans are unlikely due to direct radiation effects from $$^{137}$$Cs contamination after the FDNPP accident.

Journal Articles

Effect of heavy ion irradiation to the silkworm eggs at before fertilization and at nuclear cleavage stage

Ueda, Daisuke*; Shirai, Koji*; Funayama, Tomoo; Sakashita, Tetsuya; Yokota, Yuichiro; Kobayashi, Yasuhiko

JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 84, 2015/03

In this study, we investigated the effects of irradiation to the silkworm eggs at various developmental stages. First, we tried the irradiation to the unfertilized eggs (at 1.5 hour after oviposition). At this stage, the female pronucleus and the sperm nucleus are observed in the eggs, but not fertilized. After irradiation, the irradiated eggs stopped the development after fertilization. About 2 hours after, the egg restarted the nuclear cleavage. This result indicates the DNA damage on pronuleus cannot prevent the fertilization. We also investigated the effects of irradiation to the egg at the nuclear cleavage stage (at 6 hour after oviposition). The egg also stopped the development after irradiation, but the duration time of the developmental arrest was almost two times longer (about 4 hours) than that of the egg irradiated at fertilization.

Journal Articles

Local irradiation of heavy ions and cell surgery application

Kobayashi, Yasuhiko; Kiguchi, Kenji*

Isotope News, (593), p.9 - 12, 2003/09

no abstracts in English

Journal Articles

Irradiation effect of different heavy ions and track section on the silkworm ${it bombyx mori}$

Tu, Z.; Kobayashi, Yasuhiko; Kiguchi, Kenji*; Watanabe, Hiroshi

Nuclear Instruments and Methods in Physics Research B, 206, p.591 - 595, 2003/05

no abstracts in English

Journal Articles

Effects of heavy-ion radiosurgery on the hemopoietic function of the silkworm ${it bombyx mori}$

Tu, Z.; Kobayashi, Yasuhiko; Kiguchi, Kenji*; Watanabe, Hiroshi; Yamamoto, Kazuo*

Journal of Radiation Research, 43(3), p.269 - 275, 2002/11

 Times Cited Count:10 Percentile:68.09(Biology)

no abstracts in English

Journal Articles

Fate mapping of the cellular blastoderm stage egg of the silkworm, ${{it Bombyx mori}}$, by localized irradiation of heavy ion microbeams

Kiguchi, Kenji*; Kinjo, Y.*; Masahashi, K.*; Tu, Z.; Tamura, Hajime*; Shirai, K.*; Kanekatsu, Rensuke*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

JAERI-Review 2000-024, TIARA Annual Report 1999, p.51 - 53, 2000/10

no abstracts in English

Journal Articles

Radio-microsurgery using heavy ion microbeams

Kiguchi, Kenji*; Kobayashi, Yasuhiko

Hoshasen To Sangyo, (85), p.30 - 36, 2000/03

no abstracts in English

Journal Articles

Cell surgery applications of heavy ion microbeams

Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi; Yamamoto, Kazuo*; Yamasaki, Shuhei*; Tu, Z. L.*; Kinjo, Y.*; Kiguchi, Kenji*

Proceedings of 11th International Congress of Radiation Research (ICRR-11), 2, p.182 - 186, 2000/00

no abstracts in English

Journal Articles

Effects of heavy ion microbeams on embryogenesis in the silkworm, ${{it Bombyx mori}}$; Morphological changes of the nuclei and cells after spot irradiation

Kiguchi, Kenji*; Shima, T.*; Kinjo, Y.*; Tu, Z. L.*; Yamasaki, Shuhei*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

JAERI-Review 99-025, TIARA Annual Report 1998, p.53 - 55, 1999/10

no abstracts in English

Journal Articles

Effects of local irradiation of heavy ion beams to the hematopoietic organs of the silkworm, Bombyx mori

Tu, Z. L.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

Nippon Sanshigaku Zasshi, 68(6), p.491 - 500, 1999/00

no abstracts in English

Journal Articles

Effects of general and local irradiation of heavy ion beams on the development and morphogenesis of the silkworm, Bombyx mori

Tu, Z. L.*; Yamasaki, Shuhei*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

Nippon Sanshigaku Zasshi, 68(6), p.443 - 453, 1999/00

no abstracts in English

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