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Journal Articles

Non-invasive imaging of sodium dynamics in common reed using positron-emitting tracer imaging system

Suzui, Nobuo; Maruyama, Teppei*; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*; Fujimaki, Shu

JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 95, 2016/02

Journal Articles

Imaging of radiocesium dynamics in soybean by using a high-resolution gamma camera

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

JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 112, 2016/02

Journal Articles

Development of a gamma camera system for high-energy gamma photon for quantitative observation of $$^{137}$$Cs movement in a plant body

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

JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 94, 2016/02

Journal Articles

Evaluation of the effect of elevated concentrations of CO$$_{2}$$ in a greenhouse for tomato cultivation

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

JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 93, 2016/02

Journal Articles

A Report of 2015 IEEE Nuclear Science Symposium

Kawachi, Naoki

Hoeikyo Nyusu, (86), p.14 - 15, 2016/01

no abstracts in English

Journal Articles

Imaging of radiocesium uptake dynamics in a plant body by using a newly developed high-resolution gamma camera

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

Journal of Environmental Radioactivity, 151(Part 2), p.461 - 467, 2016/01

 Times Cited Count:5 Percentile:55.17(Environmental Sciences)

Journal Articles

A Report of 8th International Conference on Isotopes and Expo

Kawachi, Naoki

Hoshasen To Sangyo, (138), p.48 - 51, 2015/06

no abstracts in English

Journal Articles

Measurement of environmental radioactivity using a cumulative $$gamma$$ radiation dosimeter, 1; A Capability study

Yoshihara, Toshihiro*; Nagao, Yuto; Hashida, Shinnosuke*; Kawachi, Naoki; Fujimaki, Shu

Denryoku Chuo Kenkyusho Hokoku (O14002), 19 Pages, 2015/05

no abstracts in English

Journal Articles

Base to tip and long-distance transport of sodium in the root of common reed [${it Phragmites australis}$ (Cav.) Trin. ex Steud.] at steady state under constant high-salt conditions

Fujimaki, Shu; Maruyama, Teppei*; Suzui, Nobuo; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*

Plant & Cell Physiology, 56(5), p.943 - 950, 2015/05

 Times Cited Count:7 Percentile:43.5(Plant Sciences)

We analyzed the directions and rates of translocation of sodium ions (Na$$^{+}$$) within tissues of a salt-tolerant plant, common reed, and a salt-sensitive plant, rice, under constant high-salt conditions using radioactive $$^{22}$$Na tracer and a positron-emitting tracer imaging system (PETIS). First, the test plants were incubated in a nutrient solution containing 50 mM NaCl and a trace level of $$^{22}$$Na for 24 h (feeding step). Then the original solution was replaced with a fresh solution containing 50 mM NaCl but no $$^{22}$$Na, in which the test plants remained for over 48 h (chase step). Non-invasive visualization of $$^{22}$$Na movement in the test plants was conducted during feeding and chase steps with PETIS. Our results revealed that $$^{22}$$Na was absorbed in the roots of common reed, but not transported to the upper shoot beyond the shoot base. During the chase step, a basal-to-distal movement of $$^{22}$$Na was detected within the root tissue with a velocity of approximately 0.5 cm h$$^{-1}$$. On the other hand, $$^{22}$$Na that absorbed in the roots of rice was continuously translocated to the whole shoot. We concluded that the basal roots and the shoot base of common reed have constitutive functions of Na$$^{+}$$ exclusion only in the direction of root tips, even under constant high-salt conditions. This function may apparently contribute to the low Na$$^{+}$$ concentration in the upper shoot and high salt tolerance of common reed.

Journal Articles

Monitoring of positron using high-energy gamma camera for proton therapy

Yamamoto, Seiichi*; Toshito, Toshiyuki*; Komori, Masataka*; Morishita, Yuki*; Okumura, Satoshi*; Yamaguchi, Mitsutaka; Saito, Yuichi; Kawachi, Naoki; Fujimaki, Shu

Annals of Nuclear Medicine, 29(3), p.268 - 275, 2015/04

 Times Cited Count:6 Percentile:48.99(Radiology, Nuclear Medicine & Medical Imaging)

Journal Articles

Live-imaging evaluation of the efficacy of elevated CO$$_{2}$$ concentration in a closed cultivation system for the improvement of bioproduction in tomato fruits

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

Plant Biotechnology, 32(1), p.31 - 37, 2015/04

 Times Cited Count:2 Percentile:79.96(Biotechnology & Applied Microbiology)

Journal Articles

Evaluation of velocity of $$^{11}$$C-photoassimilate flow using positron-emitting tracer imaging system

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

JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 105, 2015/03

Journal Articles

Compton imaging

Kawachi, Naoki

Kaku Igaku Butsurigaku, p.280 - 284, 2015/03

no abstracts in English

Journal Articles

Ultra-high resolution of radiocesium distribution detection based on Cherenkov light imaging

Yamamoto, Seiichi*; Ogata, Yoshimune*; Kawachi, Naoki; Suzui, Nobuo; Yin, Y.-G.; Fujimaki, Shu

Nuclear Instruments and Methods in Physics Research A, 777, p.102 - 109, 2015/03

 Times Cited Count:2 Percentile:66.76(Instruments & Instrumentation)

Journal Articles

Report of 3rd International Conference on Radioecology and Environmental Radioactivity (ICRER 2014)

Kawachi, Naoki

Hoeikyo Nyusu, (82), p.4 - 6, 2015/01

no abstracts in English

Journal Articles

Effects of glutathione concentration in the root zone and glutathione treatment period on cadmium partitioning in oilseed rape plants

Nakamura, Shinichi*; Kondo, Hikari*; Suzui, Nobuo; Yin, Y.-G.; Ishii, Satomi; Kawachi, Naoki; Rai, Hiroki*; Hattori, Hiroyuki*; Fujimaki, Shu

Molecular Physiology and Ecophysiology of Sulfur, p.253 - 259, 2015/00

 Times Cited Count:1 Percentile:37.03

Journal Articles

From laboratory to field; ${it OsNRAMP5}$-knockdown rice is a promising candidate for Cd phytoremediation in paddy fields

Takahashi, Ryuichi*; Ishimaru, Yasuhiro*; Shimo, H.*; Bashir, K.*; Senoura, Takeshi*; Sugimoto, Kazuhiko*; Ono, Kazuko*; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; et al.

PLoS ONE (Internet), 9(6), p.e98816_1 - e98816_7, 2014/06

 Times Cited Count:12 Percentile:32.61(Multidisciplinary Sciences)

Journal Articles

A Kinetic analysis of cadmium accumulation in a Cd hyper-accumulator fern, ${it Athyrium yokoscense}$ and tobacco plants

Yoshihara, Toshihiro*; Suzui, Nobuo; Ishii, Satomi; Kitazaki, Mayu*; Yamazaki, Haruaki*; Kitazaki, Kazuyoshi*; Kawachi, Naoki; Yin, Y.-G.; Tanabata, Sayuri*; Hashida, Shinnosuke*; et al.

Plant, Cell & Environment, 37(5), p.1086 - 1096, 2014/05

 Times Cited Count:11 Percentile:39.28(Plant Sciences)

Journal Articles

Three-layer GSO depth-of-interaction detector for high-energy gamma camera

Yamamoto, Seiichi*; Watabe, Hiroshi*; Kawachi, Naoki; Fujimaki, Shu; Kato, Katsuhiko*; Hatazawa, Jun*

Nuclear Instruments and Methods in Physics Research A, 743, p.124 - 129, 2014/04

 Times Cited Count:8 Percentile:25.95(Instruments & Instrumentation)

Journal Articles

Radiotracer imaging for plant science

Kawachi, Naoki

Oyo Butsuri, 83(4), p.310 - 311, 2014/04

no abstracts in English

335 (Records 1-20 displayed on this page)