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Journal Articles

Production of $$^{13}$$N-labeled nitrogen gas tracer for the imaging of nitrogen fixation in soybean nodules

Ishii, Satomi; Igura, Masato*; Yin, Y.-G.; Hung, N. V. P.*; Suzui, Nobuo; Kawachi, Naoki; Koyanagi, Atsushi*; Oyama, Takuji*; Fujimaki, Shu

JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 98, 2014/03

Journal Articles

Analysis of the effect of O$$_{2}$$ partial pressure on nitrogen fixation in soybean plant using positron-emitting tracer

Hung, N. V. P.; Ishii, Satomi; Suzui, Nobuo; Kawachi, Naoki; Yin, Y.-G.; Koyanagi, Atsushi; Oyama, Takuji*; Fujimaki, Shu

JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 99, 2014/03

The impacts of oxygen in rhizosphere on the symbiotic nitrogen fixation in real-time was evaluated under various O$$_{2}$$ partial pressure. Soybean nodules were treated with mixed gas containing N$$_{2}$$ labeled with a radioisotope $$^{13}$$N and various concentrations of O$$_{2}$$, and the nitrogen fixation activity in the nodules was visualized by the positron-emitting tracer imaging system (PETIS). The results showed that under normal condition the nitrogen fixation ability of soybean plant was higher compared to that of under the other conditions (0% O$$_{2}$$ and 10% O$$_{2}$$). There was no significant difference in the nitrogen fixation activity between 0% O$$_{2}$$ and 10% O$$_{2}$$.

Journal Articles

Imaging of root exudates secreted from soybean root to soil by using carbon-11-labeled carbon dioxide and PETIS

Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Yamazaki, Haruaki; Koyanagi, Atsushi*; Fujimaki, Shu

JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 92, 2013/01

Journal Articles

A New method to analyze individual photosynthetic abilities of young plant seedlings using positron-emitting tracer imaging system (PETIS)

Kawachi, Naoki; Koyanagi, Atsushi*; Suzui, Nobuo; Ishii, Satomi; Yin, Y.-G.; Yamazaki, Haruaki; Iwasaki, Aya*; Ogawa, Kenichi*; Fujimaki, Shu

JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 93, 2013/01

Journal Articles

Photoemission spectroscopy of the filled skutterudite compound YbFe$$_{4}$$Sb$$_{12}$$

Okane, Tetsuo; Fujimori, Shinichi; Mamiya, Kazutoshi; Okamoto, Jun; Muramatsu, Yasuji; Fujimori, Atsushi; Nagamoto, Yasuyuki*; Koyanagi, Tsuyoshi*

Journal of Physics; Condensed Matter, 15(28), p.S2197 - S2200, 2003/07

 Times Cited Count:4 Percentile:27.78(Physics, Condensed Matter)

The filled skutterudite compounds $$RT_{4}X_{9}$$ ($$R$$ = alkaline earth, rare earth, actinide; $$T$$ = Fe, Ru, Os; $$X$$ = pnictogen: P, As, Sb) exhibit a variety of physical properties such as superconductivity, magnetic ordering, heavy-Fermion behavior, and metal-insulator transition. Among them, YbFe$$_{4}$$Sb$$_{12}$$ shows a heavy-Fermion or intermediate-valence behavior in the magnetic, electrical transport, and thermal properties, which might be associated with a valence instability of Yb atom. In this study, the electronic structure of YbFe$$_{4}$$Sb$$_{12}$$ have been investigated by the high-resolution photoemission spectroscopy, using He discharge lamp and synchrotron radiation as an excitation sources. The bulk and surface components of the Yb$$^{2+}$$ signal is clearly divided in the spectra. The relation of the energy position between them is anomalous compared to that of the conventional mixed-valent Yb compounds.

Oral presentation

Develop a root box for imaging of radiocesium dynamics from soil to plant

Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Yamazaki, Haruaki; Koyanagi, Atsushi*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Analysis of photoassimilate translocation in Arabiopsis seedlings by using a positron-emitting tracer imaging system (PETIS)

Koyanagi, Atsushi*; Kawachi, Naoki; Suzui, Nobuo; Ishii, Satomi; Yin, Y.-G.; Yamazaki, Haruaki; Shimada, Hiroaki*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Quantitative analysis of photosynthetic function in young Arabidopsis seedlings byusing a positron-emitting tracer imaging system (PETIS)

Kawachi, Naoki; Koyanagi, Atsushi*; Suzui, Nobuo; Ishii, Satomi; Yin, Y.-G.; Yamazaki, Haruaki; Shimada, Hiroaki*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

A New "On-Dish" method to analyze individual photosynthetic abilities of young plant seedlings

Kawachi, Naoki; Koyanagi, Atsushi*; Suzui, Nobuo; Ishii, Satomi; Yin, Y.-G.; Iwasaki, Aya*; Ogawa, Kenichi*; Fujimaki, Shu

no journal, , 

Oral presentation

Imaging and quantitative analysis of root exudates of soybean root

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

no journal, , 

no abstracts in English

Oral presentation

Development of RI imaging technology for Cs-137 kinetics imaging in intact plants

Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Koyanagi, Atsushi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Analyzing the effects of salt stress on photosynthetic abilities in Arabidopsis seedlings using Positron-emitting Tracer Imaging System (PETIS)

Koyanagi, Atsushi*; Kawachi, Naoki; Suzui, Nobuo; Ishii, Satomi; Yin, Y.-G.; Yamazaki, Haruaki*; Shimada, Hiroaki*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Improvement of the production of $$^{13}$$N-labeled nitrogen gas tracer for the imaging of nitrogen fixation in soybean nodules

Ishii, Satomi; Igura, Masato*; Suzui, Nobuo; Yin, Y.-G.; Kawachi, Naoki; Koyanagi, Atsushi*; Nguyen Van Phi, H.*; Oyama, Takuji*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Visualization and evaluation of secretion of organic substances from soybean root to soil using $$^{11}$$CO$$_{2}$$ and a positron-emitting tracer imaging system (PETIS)

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

no journal, , 

Oral presentation

Visualization of source and sink strength in ${it Arabidopsis thaliana}$ using $$^{11}$$CO$$_{2}$$ and a positron-emitting tracer imaging system (PETIS)

Suzui, Nobuo; Koyanagi, Atsushi*; Kawachi, Naoki; Yin, Y.-G.; Ishii, Satomi; Shimada, Hiroaki*; Fujimaki, Shu

no journal, , 

Oral presentation

Visualization and 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; Koyanagi, Atsushi*; Nakamura, Takuji*; Shinano, Takuro*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Development of an analytical method based on a radiotracer imaging technology to evaluate individual physiological abilities of plant seedlings

Kawachi, Naoki; Koyanagi, Atsushi*; Suzui, Nobuo; Yin, Y.-G.; Ishii, Satomi; Shimada, Hiroaki*; Fujimaki, Shu

no journal, , 

no abstracts in English

Oral presentation

Statistical analysis of carbon fixation and translocation in Arabidopsis seedlings on petri dish by using positron-emitting tracer imaging system (PETIS)

Kawachi, Naoki; Koyanagi, Atsushi*; Suzui, Nobuo; Yin, Y.-G.; Ishii, Satomi; Shimada, Hiroaki*; Fujimaki, Shu

no journal, , 

Oral presentation

Visualization of source and sink strength in ${it Arabidopsis thaliana}$ using $$^{11}$$CO$$_{2}$$ and a positron-emitting tracer imaging system (PETIS)

Fujimaki, Shu; Koyanagi, Atsushi*; Kawachi, Naoki; Suzui, Nobuo; Yin, Y.-G.; Ishii, Satomi; Shimada, Hiroaki*

no journal, , 

We developed an experimental system to evaluate photosynthetic activities of ${it Arabidopsis thaliana}$ individuals using $$^{11}$$CO$$_{2}$$ tracer gas and a positron-emitting tracer imaging system (PETIS). Two petri dishes each containing nine Arabidopsis plants (16 days or 20 days after sown) were placed into an airtight cabinet, and approximately 40 MBq of $$^{11}$$CO$$_{2}$$ was introduced with normal air. The gas in the cabinet was flushed out after 10 minutes of contact, then the dishes were mounted on the center of field of view of the imaging system, and the dynamic image of carbon distribution in the plants was acquired for 1 hour. As a result, the rates of carbon fixation and of carbon translocation in the respective individuals were estimated through quantitative analysis of the image data. Furthermore, the source and sink strength were visualized as a pixel-by-pixel map. Our method is valuable for quantitative analysis of effects of specific genes or substances on photoassimilation and partitioning.

Oral presentation

Visualization and evaluation of secretion from root to soil using a positron-emitting tracer imaging system (PETIS)

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

no journal, , 

no abstracts in English

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