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Higuchi, Kyoko*; Kurita, Keisuke; Sakai, Takuro; Suzui, Nobuo*; Sasaki, Minori*; Katori, Maya*; Wakabayashi, Yuna*; Majima, Yuta*; Saito, Akihiro*; Oyama, Takuji*; et al.
Plants (Internet), 11(6), p.817_1 - 817_11, 2022/03
Times Cited Count：2 Percentile：34.8(Plant Sciences)Genetic diversity in the rate of Fe uptake by plants has not been broadly surveyed among plant species or genotypes, although plants have developed various Fe acquisition mechanisms. We adopted the "Live-autoradiography" technique with radioactive 
Fe to directly evaluate the uptake rate of Fe by barley cultivars from a nutrient solution containing a very low concentration of Fe. Our observations revealed that the ability to acquire Fe from the low Fe solution was not always the sole determinant of tolerance to Fe deficiency among the barley genotypes.
Sn
by time resolved X-ray diffractionMachida, Akihiko; Higuchi, Kensuke*; Katayama, Yoshinori; Sakaki, Koji*; Kim, H.*; Nakamura, Yumiko*
Nihon Kinzoku Gakkai-Shi, 79(3), p.124 - 130, 2015/03
Times Cited Count：4 Percentile：22.66(Metallurgy & Metallurgical Engineering)Structural changes on hydrogen absorption process of hydrogen absorbing alloy LaNiSn have been investigated by time-resolved X-ray diffraction measurements using synchrotron radiation source. We have found the transient intermediate phase between the solid solution and hydride phases of LaNiSn under non-equilibrium hydrogen pressure condition at room temperature. LaNiSn has transformed into the hydride through three phase co-existing state. The hydrogen content of the intermediate phase estimated from the unit cell volume is independent of the induced hydrogen gas pressure. The variation of lattice constants indicate that the hydrogen atoms are located at the La
Ni(Ni,Sn) octahedron and La(Ni,Sn) tetrahedron in the intermediate phase.
Higuchi, Hidetoshi; Toya, Yuichi*; Washiya, Tadahiro; Koizumi, Kenji; Hirano, Hiroyasu
no journal, ,
Japan Atomic Energy Agency (JAEA) has been developing a reliable disassembly system for FBR fuel reprocessing as a part of FaCT. As For the disassembly system, laser type disassembly system had been developed, but it had some subjects as adhesion and fuel pin damage caused by dross. Then JAEA have proposed a new disassembly technology by mechanical disassembly system that consists of a mechanical cutting step and a wrapper tube pulling step. Mechanical cutting performance and pulling separation performance are confirmed by fundamental test, and Fundamental design of the mechanical disassembly system is established.
Kuroda, Kazuhiko*; Kitagaki, Toru; Higuchi, Hidetoshi; Tasaka, Masayuki*; Washiya, Tadahiro; Toya, Yuichi*; Nishikawa, Hideaki*; Karatsu, Fumiaki*
no journal, ,
no abstracts in English
Higuchi, Kensuke; Machida, Akihiko; Katayama, Yoshinori; Sakaki, Koji*; Nakamura, Yumiko*
no journal, ,
no abstracts in English
Higuchi, Kensuke; Machida, Akihiko; Katayama, Yoshinori; Sakaki, Koji*; Nakamura, Yumiko*
no journal, ,
no abstracts in English
Al
alloy on hydrogen absorption processHiguchi, Kensuke; Machida, Akihiko; Katayama, Yoshinori; Sakaki, Koji*; Kim, H.*; Nakamura, Yumiko*
no journal, ,
no abstracts in English
Al alloy on hydrogen absorbing processHiguchi, Kensuke; Machida, Akihiko; Katayama, Yoshinori; Sakaki, Koji*; Kim, H.*; Nakamura, Yumiko*
no journal, ,
no abstracts in English
Machida, Akihiko; Higuchi, Kensuke*; Katayama, Yoshinori; Sakaki, Koji*; Kim, H.*; Nakamura, Yumiko*
no journal, ,
We have investigated the structural properties of the hydrogen absorbing alloys on the hydrogen absorbing process. In-situ measurements are essential to elucidate the mechanism of the hydrogen storage because the hydrogen absorbing state usually keeps under the pressurized hydrogen gas environment. And then, the time-resolved measurements are one of the powerful tools for studying the gas-solid reaction processes. We have constructed the time-resolved X-ray diffraction system at BL22XU, SPring-8 in order to measure the X-ray diffraction patterns with higher time-resolution and higher quality. To demonstrate the performance of the constructed system, we have performed the time-resolved X-rays diffraction experiments for La(Ni,Al)
. We have found the formation of the transient intermediate phase on hydrogen absorbing reaction process from solid solution phase to known hydride phase.
Machida, Akihiko; Higuchi, Kensuke*; Katayama, Yoshinori; Sakaki, Koji*; Kim, H.*; Nakamura, Yumiko*
no journal, ,
To improve performance of hydrogen storage materials, it is essential to understand detailed mechanism of hydrogenation and dehydrogenation reactions. In-situ powder diffraction measurements provide direct information about structural changes accompanying the reactions. We therefore installed a time-resolved X-ray diffraction (XRD) system at a beamline BL22XU at the SPrign-8, a synchrotron radiation facility in Japan. The system equipped area detectors. A sample cell was connected to a hydrogen supply system. The pressure of hydrogen gas was limited to 1 MPa. To demonstrate the performance of the system, we have performed time-resolved XRD experiments for LaNiAl. LaNi exhibits the significant broadening of the diffraction peaks by hydrogen absorption; however, LaNiAl shows the no significant broadening. We have succeeded in the measurements of the structural change from the solid solution phase to the hydride phase and have found the formation of the transient intermediate phase on this reaction process. The system is currently used to study several materials.
M
on hydrogen absorption processMachida, Akihiko; Higuchi, Kensuke*; Watanuki, Tetsu; Katayama, Yoshinori; Sakaki, Koji*; Kim, H.*; Nakamura, Yumiko*
no journal, ,
no abstracts in English
Sasaki, Hirokazu*; Isomatsu, Takemi*; Higuchi, Masaru*; Oba, Yojiro; Onuma, Masato*
no journal, ,
no abstracts in English
