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Madokoro, Hiroshi; Sato, Ikken
Nuclear Engineering and Design, 376, p.111123_1 - 111123_15, 2021/05
Times Cited Count：6 Percentile：72.21(Nuclear Science & Technology)
near 
Song, T.*; Gubler, P.; Hong, J.*; Lee, S. H.*; Morita, Kenji*
Physics Letters B, 813, p.136065_1 - 136065_5, 2021/02
Times Cited Count：3 Percentile：34.88(Astronomy & Astrophysics)Kikuchi, Kenji
Journal of Nuclear Materials, 343(1-3), P. vii, 2005/08
The sixth International Workshop on Spallation Materials Technology was held on November 30 to December 5, 2003, in Hayama, Kanagawa, Japan. This volume contains the proceedings of that meeting and includes nearly all of the papers presented at the workshop. High Energy Accelerator Research Organization and Japan Atomic Energy Research Institute organized this meeting in cooperation with Forschungszentrum Julich (FZJ), Germany; Los Alamos National Laboratory (LANL), USA; Paul Scherrer Institute (PSI), Switzerland; and Oak Ridge National Laboratory (ORNL), USA.
Okano, Kunihiko*; Suzuki, Takahiro; Umeda, Naotaka; Hiwatari, Ryoji*; Masaki, Kei; Tobita, Kenji; Fujita, Takaaki
Purazuma, Kaku Yugo Gakkai-Shi, 81(8), p.579 - 580, 2005/08
In a toroidal system, circulating fast ions generated by neutral beam injection affect the beam stopping cross-section of the neutral beam itself. This effect is called "beam particle self-interaction (BPSI)". In a recent experiment in JT-60U with 350 keV H
beam, an indication of this BPSI effect has been found for the first time. In a low density discharge at about 1
10
m
, the beam shine-through decreased by about 35% within several hundred msec after beam injection. This result is consistent with a prediction by the BPSI theory.
Hase, Yoshihiro; Fujioka, Shozo*; Yoshida, Shigeo*; Sun, G.; Umeda, Masaaki*; Tanaka, Atsushi
Journal of Experimental Botany, 56(414), p.1263 - 1268, 2005/04
Times Cited Count：40 Percentile：65.3(Plant Sciences)The 
(
) mutant, that has serrated petals and sepals but no other large changes in plant morphology, was studied. The had a mutation in 
and an altered sterol composition. It was found that the mutation causes ectopic endoreduplication in petal tips that do not normally endoreduplicate. The rosette leaves of also showed an enhanced level of endoreduplication, but their morphology was hardly affected. These facts suggest that the suppression of endoreduplication is important for petal morphogenesis and the normal sterol composition is required for this suppression.
Kubo, Hirotaka; Masaki, Kei
Nihon Genshiryoku Gakkai-Shi, 46(8), p.576 - 577, 2004/08
no abstracts in English
is involved in the accumulation of both anthocyanins and proanthocyanidins in Kitamura, Satoshi; Shikazono, Naoya; Tanaka, Atsushi
Plant Journal, 37(1), p.104 - 114, 2004/01
Times Cited Count：383 Percentile：99.07(Plant Sciences)Flavonoid compounds such as anthocyanins and proanthocyanidins (PAs; so-called condensed tannins) must be transported from the site of synthesis in the cytosol to the vacuoles. Novel Arabidopsis mutants, transparent testa 19 (tt19), which were induced by ion beam irradiation, showed a great reduction of anthocyanin pigments in the vegetative parts as well as brown pigments in the seed coat. The TT19 gene was isolated by chromosome walking and the gene candidate approach, and was shown to be a member of the Arabidopsis glutathione S-transferase (GST) gene family. Heterologous expression of a putative ortholog, petunia AN9, in tt19 complemented the anthocyanin accumulation but not the brown pigmentation in the seed coat. This suggests that the TT19 gene is required for vacuolar uptake of anthocyanins into vacuoles, but that it has also a different function from AN9. The depositional pattern of PA precursors in the mutant was different from that in the wild type. These results indicate that TT19 participates in the PA pathway as well as the anthocyanin pathway of Arabidopsis.
gene causes hypersensitivity to Ultraviolet B light and 
-rays in Arabidopsis; Implication of the presence of a translesion synthesis mechanism in plantsSakamoto, Ayako; Lan, V. T. T.; Hase, Yoshihiro; Shikazono, Naoya; Matsunaga, Tsukasa*; Tanaka, Atsushi
Plant Cell, 15(9), p.2042 - 2057, 2003/09
Times Cited Count：81 Percentile：84.23(Biochemistry & Molecular Biology)In order to investigate UV-response mechanisms in higher plants, we isolated a UV-sensitive mutant, 
, in . The root growth of was inhibited after UV-B irradiation under both photoreactivating and non-photoreactivating conditions. We found that chromosome 1 of was broken at least at three points, causing chromosome inversion and translocation. A gene disrupted by this rearrangement encoded the catalytic subunit of DNA polymerase 
(), which is thought to be involved in translesion synthesis. The seedlings were also sensitive to -rays and MMC, which are known to inhibit DNA replication. The incorporation of BrdU after UV-B irradiation was less in 
than in the wild type plant. These results suggest that UV-damaged DNA interrupted DNA replication in the mutant, leading to the inhibition of cell division and root elongation.
Takase, Haruhiko*; Tobita, Kenji; Nishio, Satoshi
JAERI-Data/Code 2003-013, 46 Pages, 2003/08
JAERI-Data-Code-2003-013.pdf:1.59MB
no abstracts in English
mutants of 
induced by carbon ionsShikazono, Naoya; Yokota, Yukihiko*; Kitamura, Satoshi; Suzuki, Chihiro*; Watanabe, Hiroshi; Tano, Shigemitsu; Tanaka, Atsushi
Genetics, 163(4), p.1449 - 1455, 2003/04
Irradiation of by carbon ions was carried out to investigate the mutational effect of ion particles in higher plants. Frequencies of embryonic lethals and chlorophyll deficient mutants were found to be significantly higher after carbon ion-irradiation than after electron-irradiation (11-fold and 7.8-fold per unit dose, respectively). During the isolation of mutants, two new classes of flavonoid mutants (
) were isolated from carbon ion-mutagenized M2 plants. From PCR and sequence analysis, two of the three 
mutant alleles were found to have a small deletion within the 
gene and the other was revealed to contain a rearrangement. Using the segregation rates, the mutation rate of carbon ions was estimated to be 17-fold higher than that of electrons. The isolation of novel mutants and the high mutation rate suggest that ion particles can be used as a valuable mutagen for plant genetics.
Takase, Kazuyuki; Yoshida, Hiroyuki; Ose, Yasuo*
Nihon Kikai Gakkai 2003-Nendo Nenji Taikai Koen Rombunshu, Vol.6, p.205 - 206, 2003/00
no abstracts in English
irradiated by heavy ionsShikazono, Naoya; Tanaka, Atsushi; Kitayama, Shigeru*; Watanabe, Hiroshi; Tano, Shigemitsu*
Radiation and Environmental Biophysics, 41(2), p.159 - 162, 2002/04
Times Cited Count：39 Percentile：70.04(Biology)no abstracts in English
NBI Heating Laboratory
JAERI-Conf 2001-001, 122 Pages, 2001/03
JAERI-Conf-2001-001.pdf:21.64MB
The joint meeting on Plasma Surface Interaction (PSI) and Plasma Facing Components (PFC) was held in Naka Fusion Establishment on December 1, 2000. This meeting has been held to enhance information exchange between PSI and PFC researchers. In the present meeting, there were 11 presentations which covered current status of PSI and PFC studies for large fusion devices such as ITER, JT-60 and LHD, and basic studies on Hydrogen isotope behavior in the fusion material. This report includes abstracts and view graphs of these presentations.
Hase, Yoshihiro; Tanaka, Atsushi; Baba, Tomohiro*; Watanabe, Hiroshi
Plant Journal, 24(1), p.21 - 32, 2000/10
Times Cited Count：47 Percentile：71.66(Plant Sciences)no abstracts in English
Yoshii, Fumio
Hoshasen Kagaku, 2000(70), p.12 - 19, 2000/09
no abstracts in English
; Tokizawa, Takayuki; *; Nagara, Shuichi*
JNC TY6400 2000-014, 39 Pages, 2000/05
JNC-TY6400-2000-014.pdf:1.35MB
None
Yoshii, Fumio; Ito, Masanori*
Pakkupia, (569), p.34 - 39, 1999/12
no abstracts in English
Hidaka, Akihide; Maruyama, Yu; Ueno, Shingo*; Sugimoto, Jun
JAERI-Conf 99-005, p.49 - 55, 1999/07
no abstracts in English
Choe, S.*; Dilkes, B. P.*; Gregory, B. D.*; Ross, A. S.*; Yuan, H.*; Noguchi, Takahiro*; Fujioka, Shozo*; Takatsuto, Suguru*; Tanaka, Atsushi; Yoshida, Shigeo*; et al.
Plant Physiology, 119(3), p.897 - 907, 1999/03
Times Cited Count：190 Percentile：97.23(Plant Sciences)no abstracts in English
sterol C-5 desaturation step leading to brassinosteroid biosynthesisChoe, S.*; Noguchi, Takahiro*; Fujioka, Shozo*; Takatsuto, Suguru*; Tissier, C. P.*; Gregory, B. D.*; Ross, A. S.*; Tanaka, Atsushi; Yoshida, Shigeo*; Tax. F. E.*; et al.
Plant Cell, 11, p.207 - 221, 1999/02
Times Cited Count：202 Percentile：97.59(Biochemistry & Molecular Biology)no abstracts in English
