Production of 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

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2013-059.pdf

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

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2012-046.pdf

Photoemission spectroscopy of the filled skutterudite compound YbFeSb

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

https://doi.org/10.1088/0953-8984/15/28/351

The filled skutterudite compounds ( = alkaline earth, rare earth, actinide; = Fe, Ru, Os; = pnictogen: P, As, Sb) exhibit a variety of physical properties such as superconductivity, magnetic ordering, heavy-Fermion behavior, and metal-insulator transition. Among them, YbFeSb 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 YbFeSb 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 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.

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

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, , 

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

Improvement of the production of 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

Visualization of source and sink strength in using CO 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, , 

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

Visualization of source and sink strength in using CO 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 individuals using CO 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 CO 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.