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Nakanishi, Toshimichi*; Okuno, Mitsuru*; Yamasaki, Keiji*; Hong, W.*; Fujita, Natsuko; Nakamura, Toshio*; Horikawa, Yoshiyuki*; Sato, Eiichi*; Kimura, Haruo*; Tsutsumi, Hiroyuki*
Nagoya Daigaku Nendai Sokutei Kenkyu, 5, p.38 - 43, 2021/03
no abstracts in English
Sasaki, Ichiro; Yamada, Keiichi*; Watanabe, Shigeki; Hanaoka, Hirofumi*; Sugo, Yumi; Oku, Hiroyuki*; Ishioka, Noriko
JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 96, 2014/03
Sasaki, Ichiro; Yamada, Keiichi*; Watanabe, Shigeki; Hanaoka, Hirofumi*; Sugo, Yumi; Oku, Hiroyuki*; Ishioka, Noriko
Peptide Science 2013, p.157 - 160, 2013/03
Watanabe, Shigeki; Yamada, Keiichi*; Tsukui, Narutaka*; Hanaoka, Hirofumi*; Ohshima, Yasuhiro; Yamaguchi, Aiko*; Oku, Hiroyuki*; Ishioka, Noriko
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 88, 2013/01
Inami, Toshiya; Owada, Kenji; Matsuda, Yasuhiro*; Ouyang, Z. W.*; Nojiri, Hiroyuki*; Matsumura, Takeshi*; Okuyama, Daisuke*; Murakami, Yoichi*
Journal of Physics; Conference Series, 211, p.012010_1 - 012010_6, 2010/02
Times Cited Count:3 Percentile:75.92Chen, J.; Li, D.; Koshikawa, Hiroshi; Zhai, M.*; Asano, Masaharu; Oku, Hiroyuki*; Maekawa, Yasunari
Journal of Membrane Science, 344(1-2), p.266 - 274, 2009/11
Times Cited Count:15 Percentile:46.58(Engineering, Chemical)An ultrathin polyetheretherketone (PEEK) film was modified by thermal grafting of divinylbenzene (DVB) followed by radiation grafting of ethyl styrenesulfonate (ETSS), to develop a polymer electrolyte membrane (PEM) for use in direct methanol fuel cells (DMFCs). The DVB-grafting yield by thermal polymerization was less than 7%, but was sufficient to enhance the subsequent ETSS-grafting. The ETSS units were converted to styrenesulfonic acid (SS) units by hydrolysis in hot water, resulting in an ultrathin PEEK-g-DVB-g-SS PEM. FT-IR and TG analysis as well as measurements for the ion exchange capacity, water uptake, proton conductivity, mechanical strength, and methanol permeability were performed. Furthermore, this new PEM was tested in a DMFC, and a high maximum power density was confirmed. Therefore, we conclude that this modified PEEK film can be used as the PEM for the application in DMFCs.
Zhai, M.; Chen, J.; Hasegawa, Shin; Li, D.; Oku, Hiroyuki*; Maekawa, Yasunari
European Polymer Journal, 45(6), p.1668 - 1673, 2009/06
Times Cited Count:6 Percentile:21.71(Polymer Science)A perfluorinated vinyl ether monomer, 2-bromotetrafluoroethyl trifluorovinyl ether (BrTFF) was grafted into crosslinked poly(tetrafluoroethylene) (cPTFE) films by -rays irradiation under different conditions. The irradiation with absorbed doses more than 550 kGy gave the poly(BrTFF) grafted cPTFE membranes with grafting yields of more than 20%. FTIR spectra and SEM-EDS testified that BrTFF was successfully grafted into cPTFE films homogeneously in the film perpendicular direction. TGA analysis of the grafted films indicated that the perfluorinated poly(BrTFF) grafts were phase-separated from the PTFE region due to the crosslinked structure of the cPTFE based film, but the grafted films still had high thermal stability (above 300 C). The grafted film, a new kind of perfluorinated polymer with bromine active groups and good mechanical properties, is expected to be modified for new applications.
Inami, Toshiya; Owada, Kenji; Matsuda, Yasuhiro*; Ouyang, Z. W.*; Nojiri, Hiroyuki*; Matsumura, Takeshi*; Okuyama, Daisuke*; Murakami, Yoichi*
Journal of the Physical Society of Japan, 78(3), p.033707_1 - 033707_4, 2009/03
Times Cited Count:16 Percentile:65.84(Physics, Multidisciplinary)Oku, Hiroyuki*; Yamada, Keiichi*; Kobayashi, Kyoko*; Katakai, Ryoichi*; Ashfaq, M.*; Hanaoka, Hirofumi*; Iida, Yasuhiko*; Endo, Keigo*; Hasegawa, Shin; Maekawa, Yasunari; et al.
Peptide Science 2008, p.439 - 442, 2009/03
Malaria is the major cause of mortality and morbidity in the tropical and subtropical regions in the world. Our previous studies have shown that a series of partial peptides of a Plasmodium falciparum enolase have antigenic reactivity against patients' sera. In this paper, we wish to report nano-encapsulation of a synthetic antigen into bioabsorbable polymer particles and their releasing studies in vitro and in vivo.
Li, D.*; Chen, J.; Zhai, M.; Asano, Masaharu; Maekawa, Yasunari; Oku, Hiroyuki*; Yoshida, Masaru
Nuclear Instruments and Methods in Physics Research B, 267(1), p.103 - 107, 2009/01
Times Cited Count:28 Percentile:86.67(Instruments & Instrumentation)Novel method for preparing aromatic hydrocarbon proton-conductive membranes without sulfonation and membrane casting process is achieved by radiation grafting of sodium styrenesulfonate to an aromatic polyamide, poly(m-xylylene adipamide) (Nylon-MXD6) films and subsequent ion-exchange. The styrenesulfonate was easily grafted into the Nylon-MXD6 films from an oxygen-free dimethyl sulfoxide (DMSO) solution. As a result, the resulted styrenesulfonic acid-grafted Nylon-MXD6 films, namely proton-conductive membrane, with high ion exchange capacity up to 1.63 mmol/g, can be obtained. The membrane was transparent and highly hydrophilic. Furthermore, the methanol permeability was significantly lower than that of the Nafion membrane. Therefore, the Nylon-MXD6-based proton-conductive membrane is a more promising material for the direct methanol fuel cells (DMFCs).
Ninomiya, Hiromasa; Akiba, Masato; Fujii, Tsuneyuki; Fujita, Takaaki; Fujiwara, Masami*; Hamamatsu, Kiyotaka; Hayashi, Nobuhiko; Hosogane, Nobuyuki; Ikeda, Yoshitaka; Inoue, Nobuyuki; et al.
Journal of the Korean Physical Society, 49, p.S428 - S432, 2006/12
To contribute DEMO and ITER, the design to modify the present JT-60U into superconducting coil machine, named National Centralized Tokamak (NCT), is being progressed under nationwide collaborations in Japan. Mission, design and strategy of this NCT program is summarized.
Kikuchi, Mitsuru; Tamai, Hiroshi; Matsukawa, Makoto; Fujita, Takaaki; Takase, Yuichi*; Sakurai, Shinji; Kizu, Kaname; Tsuchiya, Katsuhiko; Kurita, Genichi; Morioka, Atsuhiko; et al.
Nuclear Fusion, 46(3), p.S29 - S38, 2006/03
Times Cited Count:13 Percentile:41.84(Physics, Fluids & Plasmas)The National Centralized Tokamak (NCT) facility program is a domestic research program for advanced tokamak research to succeed JT-60U incorporating Japanese university accomplishments. The mission of NCT is to establish high beta steady-state operation for DEMO and to contribute to ITER. The machine flexibility and mobility is pursued in aspect ratio and shape controllability, feedback control of resistive wall modes, wide current and pressure profile control capability for the demonstration of the high-b steady state.
Tsuchiya, Katsuhiko; Akiba, Masato; Azechi, Hiroshi*; Fujii, Tsuneyuki; Fujita, Takaaki; Fujiwara, Masami*; Hamamatsu, Kiyotaka; Hashizume, Hidetoshi*; Hayashi, Nobuhiko; Horiike, Hiroshi*; et al.
Fusion Engineering and Design, 81(8-14), p.1599 - 1605, 2006/02
Times Cited Count:1 Percentile:9.98(Nuclear Science & Technology)no abstracts in English
Tamai, Hiroshi; Akiba, Masato; Azechi, Hiroshi*; Fujita, Takaaki; Hamamatsu, Kiyotaka; Hashizume, Hidetoshi*; Hayashi, Nobuhiko; Horiike, Hiroshi*; Hosogane, Nobuyuki; Ichimura, Makoto*; et al.
Nuclear Fusion, 45(12), p.1676 - 1683, 2005/12
Times Cited Count:15 Percentile:45.55(Physics, Fluids & Plasmas)Design studies are shown on the National Centralized Tokamak facility. The machine design is carried out to investigate the capability for the flexibility in aspect ratio and shape controllability for the demonstration of the high-beta steady state operation with nation-wide collaboration, in parallel with ITER towards DEMO. Two designs are proposed and assessed with respect to the physics requirements such as confinement, stability, current drive, divertor, and energetic particle confinement. The operation range in the aspect ratio and the plasma shape is widely enhanced in consistent with the sufficient divertor pumping. Evaluations of the plasma performance towards the determination of machine design are presented.
Inami, Toshiya; Owada, Kenji; Matsuda, Yasuhiro*; Nojiri, Hiroyuki*; Okuyama, Daisuke*; Matsumura, Takeshi*; Murakami, Yoichi*
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no abstracts in English
Inami, Toshiya; Owada, Kenji; Ouyang, Z. W.*; Matsuda, Yasuhiro*; Nojiri, Hiroyuki*; Matsumura, Takeshi*; Okuyama, Daisuke*; Murakami, Yoichi*
no journal, ,
no abstracts in English
Kamei, Yuto; Hiroki, Akihiro; Nagasawa, Naotsugu; Tamada, Masao; Oku, Hiroyuki*
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no abstracts in English
Kamei, Yuto; Hiroki, Akihiro; Nagasawa, Naotsugu; Tamada, Masao; Oku, Hiroyuki*
no journal, ,
no abstracts in English
Li, D.*; Chen, J.; Zhai, M.*; Asano, Masaharu; Maekawa, Yasunari; Oku, Hiroyuki*; Yoshida, Masaru
no journal, ,
no abstracts in English
Asano, Masaharu; Chen, J.; Maekawa, Yasunari; Li, D.*; Oku, Hiroyuki*
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no abstracts in English