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Journal Articles

Impacts of C-uptake by plants on the spatial distribution of $$^{14}$$C accumulated in vegetation around a nuclear facility; Application of a sophisticated land surface $$^{14}$$C model to the Rokkasho reprocessing plant, Japan

Ota, Masakazu; Katata, Genki; Nagai, Haruyasu; Terada, Hiroaki

Journal of Environmental Radioactivity, 162-163, p.189 - 204, 2016/10

 Times Cited Count:7 Percentile:22.36(Environmental Sciences)

Impacts of plant C uptake on ($$^{14}$$C) distributions around a nuclear facility were investigated by a land surface $$^{14}$$C model (SOLVEG-II). The simulation combined the SOLVEG-II with a mesoscale model and an dispersion model was applied to $$^{14}$$CO$$_{2}$$ transfer at test operations of the Rokkasho reprocessing plant (RRP) in 2007. The calculated $$^{14}$$C-specific activities in rice grains agreed with the observations. Numerical experiment of chronic $$^{14}$$CO$$_{2}$$ release from the RRP showed that $$^{14}$$C-specific activities of rice plants at harvest differed from the annual mean ones in the air, which was attributed to seasonal variations in atmospheric $$^{14}$$CO$$_{2}$$ and plant growth. $$^{14}$$C accumulation in plant significantly increased when $$^{14}$$CO$$_{2}$$ releases were limited during daytime, compared with the results observed during nighttime, due to extensive $$^{14}$$CO$$_{2}$$ uptake by daytime photosynthesis. These results indicated that plant growth and photosynthesis should be considered in predictions of ingestion dose of $$^{14}$$C for long-term chronic and short-term diurnal releases of $$^{14}$$CO$$_{2}$$, respectively.

Journal Articles

A New visualization technique for the study of the accumulation of photoassimilates in wheat grains using [$$^{11}$$C]CO$$_{2}$$

Matsuhashi, Shimpei; Fujimaki, Shu; Uchida, Hiroshi*; Ishioka, Noriko; Kume, Tamikazu

Applied Radiation and Isotopes, 64(4), p.435 - 440, 2006/04

 Times Cited Count:19 Percentile:77.5(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Quantitative modeling of photoassimilate flow in an intact plant using the Positron Emitting Tracer Imaging System (PETIS)

Matsuhashi, Shimpei; Fujimaki, Shu; Kawachi, Naoki; Sakamoto, Koichi; Ishioka, Noriko; Kume, Tamikazu

Soil Science and Plant Nutrition, 51(3), p.417 - 423, 2005/06

 Times Cited Count:24 Percentile:52.22(Plant Sciences)

no abstracts in English

Journal Articles

Application of positron imaging for plant research

Kume, Tamikazu

Dai-23-Kai Nihon Aisotopu, Hoshasen Sogo Kaigi Hobunshu, p.1 - 8, 1998/00

no abstracts in English

Journal Articles

Analysis of carbon translocation in plants using positron-emitting tracer

Kume, Tamikazu; Matsuhashi, Shimpei; Ito, Hitoshi; G.W.Roeb*; Ishioka, Noriko; Osa, Akihiko; Matsuoka, Hiromitsu; Sekine, Toshiaki; Uchida, Hiroshi*; Tsuji, Atsunori*; et al.

JAERI-Review 97-015, p.51 - 53, 1997/11

no abstracts in English

Journal Articles

Laser-induced photochemical reaction of maleic acid solutions in the presence of hydrogen peroxide

Shimizu, Yuichi; Sugimoto, Shunichi*; Kawanishi, Shunichi; Suzuki, Nobutake

Laser Chem., 17, p.97 - 108, 1997/00

no abstracts in English

Journal Articles

New and direct synthesis of lactic acid from acrylic acid using an excimer laser with high intensity

Shimizu, Yuichi; Kawanishi, Shunichi

Chemistry Letters, 0(11), p.935 - 936, 1996/11

no abstracts in English

Oral presentation

Evaluation of secretion from soybean root to soil using a positron-emitting tracer imaging system (PETIS)

Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Nakamura, Takuji*; Shinano, Takuro*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Visualization of secretion from soybean root using a positron-emitting tracer imaging system (PETIS)

Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Kurita, Keisuke; Nakamura, Takuji*; Shinano, Takuro*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Visualization and quantitative analysis of secretions from soybean root, 2; Comparison of distribution of the secretions in different culture medium

Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Kurita, Keisuke; Nakamura, Takuji*; Shinano, Takuro*; Fujimaki, Shu

no journal, , 

no abstracts in English

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