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Journal Articles

Observation of adsorbed hydrogen species on supported metal catalysts by inelastic neutron scattering

Yoshida, Hisao*; Yamamoto, Akira*; Hosokawa, Saburo*; Yamazoe, Seiji*; Kikkawa, Soichi*; Hara, Kenji*; Nakamura, Mitsutaka; Kamazawa, Kazuya*; Tanaka, Tsunehiro*

Topics in Catalysis, 64(9-12), p.660 - 671, 2021/08

 Times Cited Count:0 Percentile:0.01(Chemistry, Applied)

Journal Articles

Identification of hydrogen species on Pt/Al$$_{2}$$O$$_{3}$$ by ${it in situ}$ inelastic neutron scattering and their reactivity with ethylene

Yamazoe, Seiji*; Yamamoto, Akira*; Hosokawa, Saburo*; Fukuda, Ryoichi*; Hara, Kenji*; Nakamura, Mitsutaka; Kamazawa, Kazuya*; Tsukuda, Tatsuya*; Yoshida, Hisao*; Tanaka, Tsunehiro*

Catalysis Science & Technology, 11(1), p.116 - 123, 2021/01

 Times Cited Count:3 Percentile:81.22(Chemistry, Physical)

JAEA Reports

Construction of a car-borne survey system for measurement of dose rates in air; KURAMA-II, and its application

Tsuda, Shuichi; Yoshida, Tadayoshi; Nakahara, Yukio; Sato, Tetsuro; Seki, Akiyuki; Matsuda, Norihiro; Ando, Masaki; Takemiya, Hiroshi; Tanigaki, Minoru*; Takamiya, Koichi*; et al.

JAEA-Technology 2013-037, 54 Pages, 2013/10

JAEA-Technology-2013-037.pdf:4.94MB

JAEA has been performing dose rate mapping in air using a car-borne survey system KURAMA-II. The KURAMA system is a GPS-aided mobile radiation monitoring system that has been newly developed by Kyoto University Research Reactor Institute in response to the nuclear disaster. The KURAMA system is composed of an energy-compensated scintillation survey meter for measuring dose rate, electric device for controlling both the dose rates and the position data from a GPS module, a computer server for processing and analyzing data from KURAMA, and client PCs for providing for end users. The KURAMA-II has been improved in small-packaging, durability, and automated data transmission. In consequence, dose rate mapping in wide area has become possible in shorter period of time. This report describes the construction of KURAMA-II, its application and a suggestion of how to manage a large number of KURAMA-II.

Journal Articles

Rapid and quantitative electrolytic preparation and speciation of neptunium ions of various oxidation states using multi-step column electrodes

Aoyagi, Hisao*; Kitatsuji, Yoshihiro; Yoshida, Zenko; Kihara, Sorin*

Analytica Chimica Acta, 538(1-2), p.283 - 289, 2005/05

 Times Cited Count:14 Percentile:41.48(Chemistry, Analytical)

Redox behavior of Np(III), (IV), (V) and (VI) ions in aqueous perchloric, nitric and sulphuric acid solutions was elucidated by using column electrodes connected in series in a flow system. Using a glassy carbon fiber working electrode as the column electrode was found to be very useful for the investigation of current-potential relations of not only reversible redox processes such as Np(VI)/(V) or Np(IV)/(III) but also irreversible processes such as Np(V)/(IV) or Np(V)/(III), the latter not observed by conventional voltammetry which uses a glassy carbon or platinum electrode. Quantitative electrolysis could be executed even if the redox process was completely irreversible by the use of the column electrodes. By taking advantage of column electrode electrolysis, a novel method was developed for the rapid preparation of a neptunium species of a desired oxidation state, including unstable species. The multi-step column electrode system was demonstrated to be useful for the coulometric determination and speciation of Np(IV), (V) and (VI) in aqueous HNO$$_{3}$$ solution as an example.

Journal Articles

New method for the separation of actinide ions by controlled-potential electrolysis at the interface between aqueous and organic solutions

Kitatsuji, Yoshihiro; Aoyagi, Hisao; Kimura, Takaumi; Yoshida, Zenko; Kudo, Hiroshi*; Kihara, Sorin*

Journal of Nuclear Science and Technology, 39(Suppl.3), p.259 - 262, 2002/11

Controlled-potential electrolysis (CPE) method for the transfer of an ion at the interface of two immiscible electrolyte solutions has been developed. The CPE method was applied to the transfer of actinide ions such as UO$$_{2}$$$$^{2+}$$ and Am$$^{3+}$$ between aqueous (W) and nitrobenzene (NB) solutions. The transfer of actinide ions from W to NB facilitated by bis(diphenyl-phosphoryl)methane (BDPPM) was studied, and it was found that CPE was successfully applied to the electrolytic separation of U(VI) and Am(III) from W to NB containing BDPPM.

Journal Articles

A Critical evaluation of the redox properties of uranium, neptunium and plutonium ions in acidic aqueous solutions

Kihara, Sorin*; Yoshida, Zenko; Aoyagi, Hisao; Maeda, Koji*; Shirai, Osamu; Kitatsuji, Yoshihiro; Yoshida, Yumi*

Pure and Applied Chemistry, 71(9), p.1771 - 1807, 1999/09

 Times Cited Count:45 Percentile:80.7(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Plutonium(III)-ion selective electrode of liquid membrane type using multidentate phosphine oxide ionophore

Kitatsuji, Yoshihiro; Aoyagi, Hisao; Yoshida, Zenko; Kihara, Sorin*

Analytica Chimica Acta, 387, p.181 - 187, 1999/00

 Times Cited Count:11 Percentile:40.75(Chemistry, Analytical)

no abstracts in English

Journal Articles

Voltammetric study on ion transfer of uranium(VI) ion between aqueous and nitrobenzene phases in the presence of bis(diphenylphosphoryl) methane

Kitatsuji, Yoshihiro; Aoyagi, Hisao; Yoshida, Zenko; Kihara, Sorin*

Analytical Sciences, 14, p.67 - 70, 1998/02

 Times Cited Count:11 Percentile:39.71(Chemistry, Analytical)

no abstracts in English

Journal Articles

Kinetics of reduction of uranium(VI) to uranium(IV) at titanium electrode in nitric acid and hydrazine media

K-W.Kim*; J-D.Kim*; Aoyagi, Hisao; Yoshida, Zenko

Journal of Nuclear Science and Technology, 31(4), p.329 - 334, 1994/04

 Times Cited Count:8 Percentile:61.28(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Voltammetric study on the transfer of U, Np and Pu ions at the aqueous-organic interface facilitated by phosphine oxides

Yoshida, Zenko; Aoyagi, Hisao; Meguro, Yoshihiro; Kitatsuji, Yoshihiro; Kihara, Sorin*

Journal of Alloys and Compounds, 213-214, p.324 - 327, 1994/00

 Times Cited Count:8 Percentile:58.71(Chemistry, Physical)

no abstracts in English

Journal Articles

Spent fuel reprocessing based on electrochemical extraction process(SREEP)

Yoshida, Zenko; Aoyagi, Hisao; ; Takeishi, Hideyo; Sasaki, Yuji; Uno, Seiichiro; Tachikawa, Enzo

Journal of Alloys and Compounds, 213-214, p.453 - 455, 1994/00

 Times Cited Count:7 Percentile:55.74(Chemistry, Physical)

no abstracts in English

Journal Articles

Pretreatment of a titanium electrode for reduction of Uranium(VI) in nitric acid-hydrazine media

K.-W.Kim*; J.-D.Kim*; Aoyagi, Hisao; ; Yoshida, Zenko

Journal of Nuclear Science and Technology, 30(6), p.554 - 559, 1993/06

 Times Cited Count:4 Percentile:45.58(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Determination of concentration and distribution of (CuO)$$^{+}$$ in high-T$$_{c}$$ superconducting La$$_{2-x}$$Sr$$_{x}$$CuO$$_{y}$$ pellet by flow-coulometry

Sasaki, Yuji; Aoyagi, Hisao; Takeishi, Hideyo; Yoshida, Zenko

Physica C, 191, p.347 - 353, 1992/00

 Times Cited Count:7 Percentile:55.21

no abstracts in English

Journal Articles

Chemical analysis of oxidation state of copper or oxygen and its distribution in superconducting La-Sr-Cu oxide

Sasaki, Yuji; Aoyagi, Hisao; Takeishi, Hideyo; Yoshida, Zenko

Analytical Sciences, 7(Suppl.), p.1201 - 1204, 1991/00

no abstracts in English

Journal Articles

Electrode processes of plutonium ions in phosphate media

Yoshida, Zenko; Aoyagi, Hisao; *

Z. Anal. Chem., 340, p.403 - 409, 1991/00

no abstracts in English

JAEA Reports

Determination of plutonium in nitric acid solution by spectrophotometry of Pu(VI), II

; Aoyagi, Hisao; Yoshida, Zenko

JAERI-M 87-084, 10 Pages, 1987/06

JAERI-M-87-084.pdf:0.46MB

no abstracts in English

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