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Oba, Yojiro; Shinohara, Takenao; Sato, Hirotaka*; Onodera, Yohei*; Hiroi, Kosuke; Su, Y. H.; Sugiyama, Masaaki*
Journal of the Physical Society of Japan, 87(9), p.094004_1 - 094004_5, 2018/09
Times Cited Count：1 Percentile：11.98(Physics, Multidisciplinary)no abstracts in English
Omichi, Masaaki*; Asano, Atsushi*; Tsukuda, Satoshi*; Takano, Katsuyoshi*; Sugimoto, Masaki; Saeki, Akinori*; Sakamaki, Daisuke*; Onoda, Akira*; Hayashi, Takashi*; Seki, Shu*
Nature Communications (Internet), 5, p.3718_1 - 3718_8, 2014/04
Times Cited Count：35 Percentile：78.11(Multidisciplinary Sciences)Protein nanowires exhibiting specific biological activities hold promise for interacting with living cells and controlling and predicting biological responses such as apoptosis, endocytosis and cell adhesion. Here we report the result of the interaction of a single high-energy charged particle with protein molecules. Degradation of the human serum albumin nanowires was examined using trypsin. The biotinylated human serum albumin nanowires bound avidin, demonstrating the high affinity of the nanowires. Human serum albumin-avidin hybrid nanowires were also fabricated from a solid state mixture and exhibited good mechanical strength. The biotinylated human serum albumin nanowires can be transformed into nanowires exhibiting a biological function such as avidin-biotinyl interactions and peroxidase activity. The present technique is a versatile platform for functionalizing the surface of any protein molecule with an extremely large surface area.
Osawa, Takahito; Ono, Masao; Esaka, Fumitaka; Okayasu, Satoru; Iguchi, Yusuke*; Hao, T.; Magara, Masaaki; Mashimo, Tsutomu
EPL; A Letters Journal Exploring the Frontiers of Physics, 85(6), p.64001_1 - 64001_5, 2009/03
Times Cited Count：6 Percentile：41.67(Physics, Multidisciplinary)Pure tin metals were centrifuged at 1
and at 220 
C for 100 hours, 0.40 at 220-230 C for 24 hours, and 0.25 at 220 C for 24 hours. Their isotopic compositions were measured by a secondary ion mass spectrometer (SIMS). 
Sn/
Sn and 
Sn/Sn ratios of the 1.02 sample were considerably different than the initial compositions, and the magnitude of isotopic fractionation reached 2.6%. A three-isotope diagram of Sn/Sn versus Sn/Sn shows conclusively that isotopic fractionation caused by a gravitational field depended only on isotopic mass.
Esaka, Fumitaka; Watanabe, Kazuo; Onodera, Takashi; Lee, C. G.; Magara, Masaaki; Sakurai, Satoshi; Usuda, Shigekazu
Applied Surface Science, 255(4), p.1512 - 1515, 2008/12
Times Cited Count：9 Percentile：40.55(Chemistry, Physical)Isotope ratio analysis of individual uranium particles in environmental samples taken at nuclear facilities is one of the key techniques for nuclear safeguards. For accurate analysis, we developed a combined technique of single particle manipulation, which was carried out in scanning electron microscope (SEM), and SIMS. This technique gives information on particle size as well as isotope ratios for each particle. In the present study, the particle size dependence of the precision of uranium isotope ratio is investigated by using the SEM-SIMS technique. In the analysis of individual particles of a CRM U050 (5% enriched uranium) sample, even if the particle diameter was 0.5 
m, the analysis with the precision of 
U/
U isotope ratio within 5% was possible. In the presentation, the results obtained for the other uranium particles having different isotopic composition will also be presented.
Magara, Masaaki; Usuda, Shigekazu; Sakurai, Satoshi; Shinohara, Nobuo; Esaka, Fumitaka; Kokubu, Yoko; Suzuki, Daisuke; Yasuda, Kenichiro; Lee, C. G.; Inagawa, Jun; et al.
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-29-Kai Nenji Taikai Rombunshu (CD-ROM), 6 Pages, 2008/00
JAEA has been developing, under the auspices of the Ministry of Education, Culture, Sports, Science and Technology of Japan, analytical techniques for ultra-trace amounts of nuclear materials in the environmental samples in order to contribute to the strengthened safeguards system. In January 2003, JAEA was qualified as a member of the IAEA network analytical laboratories (NWAL) for environmental sample analysis. Since then, JAEA has conducted the analysis of domestic and the IAEA samples. Two techniques, bulk and particle analyses, are available for the environmental samples and the latter method generally provides more detailed information about history of nuclear materials in a facility. However, isotope ratios of uranium are measured in the particle analysis at present and it is wished to develop analytical method for isotope ratios of plutonium in individual particles. We commence the development of the plutonium particle analysis and the consideration of age-dating for plutonium particles through the atomic ratio of Pu-241 and Am-241.
Sakurai, Satoshi; Magara, Masaaki; Usuda, Shigekazu; Watanabe, Kazuo; Esaka, Fumitaka; Hirayama, Fumio; Lee, C. G.; Yasuda, Kenichiro; Kono, Nobuaki; Inagawa, Jun; et al.
Proceedings of International Conference on Nuclear Energy System for Future Generation and Global Sustainability (GLOBAL 2005) (CD-ROM), 6 Pages, 2005/10
no abstracts in English
Magara, Masaaki; Usuda, Shigekazu; Sakurai, Satoshi; Watanabe, Kazuo; Esaka, Fumitaka; Hirayama, Fumio; Lee, C. G.; Yasuda, Kenichiro; Kono, Nobuaki; Inagawa, Jun; et al.
Dai-26-Kai Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Nenji Taikai Rombunshu, p.157 - 164, 2005/00
JAERI has conducted the analysis of domestic and the IAEA samples. JAERI is developing the analytical techniques to improve the analytical ability for the safeguards environmental samples. For bulk analysis, study is focused on the improvement of reliability of isotope ratio measurements by ICP-MS. New chemical separation techniques are under development and a desolvation module is introduced to reduce the polyatomic interferences. In particle analysis, the sample preparation procedure for SIMS method is modified to measure the 
U/U and 
U/U ratios for individual particles. We are also developing fission track-TIMS method to measure uranium isotope ratios in particles of sub-micrometer size. A screening instrument of X-ray fluorescent analysis is equipped to measure elemental distribution on a swipe surface.
Magara, Masaaki; Usuda, Shigekazu; Sakurai, Satoshi; Watanabe, Kazuo; Esaka, Fumitaka; Hirayama, Fumio; Lee, C. G.; Yasuda, Kenichiro; Kono, Nobuaki; Inagawa, Jun; et al.
Proceedings of INMM 46th Annual Meeting (CD-ROM), 8 Pages, 2005/00
JAERI has been developing analytical techniques for ultra-trace amounts of nuclear materials in the environmental samples in order to contribute to the strengthened safeguards system. Development of essential techniques for bulk and particle analysis of the environmental swipe sample has been established as an ultra-trace analytical method of uranium and plutonium. In January 2003, JAERI was qualified as a member of the IAEA network analytical laboratories for environmental samples. Since then, JAERI has conducted the analysis of domestic and the IAEA samples. From Japanese fiscal year 2003, the second phase of the project was started for the development of advanced techniques, such as analyzing minor actinides and fission products as well as uranium and plutonium, particle analysis using fission-track technique, more efficient particle analysis using ICP-TOFMS and screening by X-ray fluorescent analysis. This paper deals with the progress in the development of the new techniques, applications and future perspective.
Esaka, Fumitaka; Watanabe, Kazuo; Fukuyama, Hiroyasu; Onodera, Takashi; Esaka, Konomi; Magara, Masaaki; Sakurai, Satoshi; Usuda, Shigekazu
Journal of Nuclear Science and Technology, 41(11), p.1027 - 1032, 2004/11
Times Cited Count：60 Percentile：95.56(Nuclear Science & Technology)A new particle recovery method and a sensitive screening method were developed for subsequent isotope ratio analysis of uranium particles in safeguards swipe samples. The particles in the swipe sample were recovered onto a carrier by means of vacuum suction 8211; impact collection method. When grease coating was applied to the carrier, the recovery efficiency was improved to 48 %, which is superior to that of conventionally-used ultrasoneration method. Prior to isotope ratio analysis with secondary ion mass spectrometry (SIMS), total reflection X-ray fluorescence spectrometry (TXRF) was applied to screen the sample for the presence of uranium particles. By the use of Si carriers in TXRF analysis, the detection limit of 22 pg was achieved for uranium. By combining these methods with SIMS, the isotope ratios of U/U for individual uranium particles were efficiently determined.
Esaka, Fumitaka; Watanabe, Kazuo; Fukuyama, Hiroyasu; Onodera, Takashi; Esaka, Konomi; Inagawa, Jun; Iguchi, Kazunari; Suzuki, Daisuke; Lee, C. G.; Magara, Masaaki; et al.
Dai-25-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, p.128 - 135, 2004/00
Japan Atomic Energy Research Institute (JAERI) was qualified as a member of the IAEA network analytical laboratories (NWALs) for particle and bulk analyses of safeguards environmental samples in January 2003. The particle analysis gives more detailed information on nuclear facility operation than the bulk analysis because the isotope ratios of nuclear materials in the samples collected inside nuclear facilities (swipe samples) can be determined for individual particles. We applied, as a method for uranium isotope ratio measurement, secondary ion mass spectrometry (SIMS) to particle analysis. Prior to the SIMS analysis, the particles in a swipe sample are recovered onto a carrier by impaction. The carriers with the recovered particles are then screened by total reflection X-ray fluorescence spectrometry. We integrated these techniques into a standard procedure, which is applied to domestic and IAEA swipe samples routinely.
Esaka, Fumitaka; Watanabe, Kazuo; Onodera, Takashi; Taguchi, Takuji; Magara, Masaaki; Usuda, Shigekazu
Spectrochimica Acta, Part B, 58(12), p.2145 - 2155, 2003/12
Times Cited Count：20 Percentile：62.39(Spectroscopy)In order to improve the sensitivity of elemental analysis for aerosol particles by total-reflection X-ray fluorescence spectrometry (TXRF), silicon wafer carriers with diameters of 25 mm were selected and prepared for direct impact collection and subsequent analysis. The detection limits of elements on the carrier were determined and found to be superior to those on glassy carbon and quartz glass carriers used in previous studies. By using the silicon wafer carriers, aerosol particles with the sizes of 
2.0 m, 0.3-2.0 m and 0.05-0.3 m were collected at Ibaraki in Japan from January to August 2002 and analyzed by TXRF. Selenium Consequently, the elements with the concentration of ng/m
&8211; pg/m in the particles were successfully detected. The results revealed that K, V, Zn, Br and Pb were concentrated in fine particles, which is presumed to arise from anthropogenic sources. In contrast, Ca, Ti and Fe were contained in coarse particles, which is presumed to arise from soil.
Kawamura, Masato*; Anami, Shozo*; Fukui, Yuji*; Kubota, Chikashi*; Ono, Masaaki*; Chishiro, Etsuji; Yumino, Yuichi*; Kubo, Hiroshi*
Proceedings of 28th Linear Accelerator Meeting in Japan, p.369 - 371, 2003/07
no abstracts in English
Ouchi, Nobuo; Mizumoto, Motoharu; Kusano, Joichi; Chishiro, Etsuji; Hasegawa, Kazuo; Akaoka, Nobuo*; Saito, Kenji*; Noguchi, Shuichi*; Kako, Eiji*; Inoue, Hitoshi*; et al.
Proceedings of 20th International Linac Conference (CD-ROM), 1 Pages, 2000/00
no abstracts in English
Ouchi, Nobuo; Kusano, Joichi; Akaoka, Nobuo*; B.Fechner*; Hasegawa, Kazuo; Takeuchi, Suehiro; Mizumoto, Motoharu; Saito, Kenji*; Noguchi, Shuichi*; *; et al.
Proc. of 1st Asian Particle Accelerator Conf. (APAC98), p.77 - 79, 1998/11
no abstracts in English
Ouchi, Nobuo; Kusano, Joichi; Akaoka, Nobuo*; Takeuchi, Suehiro; Hasegawa, Kazuo; Mizumoto, Motoharu; Inoue, Hitoshi*; *; Noguchi, Shuichi*; *; et al.
Development of Large Scale Superconducting Radio Frequency (SRF) Technologies, p.50 - 55, 1998/00
no abstracts in English
Omori, Kenichiro; Usui, Katsutomi; Oshima, Katsumi*; Oga, Tokumichi; Kawai, Mikito; Watanabe, Kazuhiro; Ito, Takao; Kuriyama, Masaaki; Ono, Yoichi*; Kawashima, Shuichi*
Fusion Technology 1998, 1, 4 Pages, 1998/00
no abstracts in English
Akaoka, Nobuo*; Kusano, Joichi; Ouchi, Nobuo; Mizumoto, Motoharu; Takeda, O.*; Noguchi, Shuichi*; Saito, Kenji*; *; *; *
Proceedings of 23rd Linear Accelerator Meeting in Japan, p.289 - 291, 1998/00
no abstracts in English
Kusano, Joichi; Ouchi, Nobuo; Akaoka, Nobuo*; Tomisawa, Tetsuo; Takeuchi, Suehiro; Mizumoto, Motoharu; Noguchi, Shuichi*; Saito, Kenji*; Inoue, Hitoshi*; *; et al.
Proceedings of 23rd Linear Accelerator Meeting in Japan, p.124 - 126, 1998/00
no abstracts in English
Ouchi, Nobuo; Kusano, Joichi; Noguchi, Shuichi*; Saito, Kenji*; Inoue, Hitoshi*; *; *; Mizumoto, Motoharu; B.Fechner*; Mukugi, Ken*; et al.
Proc. of 22nd Linear Accelerator Meeting in Japan, p.167 - 169, 1997/00
no abstracts in English
Ouchi, Nobuo; Kusano, Joichi; Akaoka, Nobuo*; Takeuchi, Suehiro; B.Fechner*; Hasegawa, Kazuo; Mizumoto, Motoharu; Inoue, Hitoshi*; *; Noguchi, Shuichi*; et al.
Proc. of 8th Workshop on RF Superconductivity, 1, p.22 - 26, 1997/00
no abstracts in English
