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Bando S, Ichikawa R, Taguchi T, Fujimoto K, Motomiya T, Taguchi M, Takano K, Shichiri M, Miyatsuka T. Effects of luseogliflozin on the secretion of islet hormones and incretins in patients with type 2 diabetes. Endocr J 2022; 69:681-687. [PMID: 35067495 DOI: 10.1507/endocrj.ej21-0696] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The insufficient activity of insulin and the hyperactivity of glucagon are responsible for glucose intolerance in patients with type 2 diabetes. Whereas sodium-glucose cotransporter-2 (SGLT2) inhibitors improve blood glucose levels in patients with type 2 diabetes, their effects on the secretion profiles of glucagon and incretins remain unclear. Therefore, to investigate the effects of the SGLT2 inhibitor luseogliflozin on metabolic and endocrine profiles, 19 outpatients with type 2 diabetes were administered luseogliflozin for 12 weeks. It is of note that all subjects were treated only with diet and exercise therapy, and we were able to investigate the effects of luseogliflozin separately from the effects of other antidiabetic agents. Body weight, body fat mass, fat-free mass, and muscle mass were significantly reduced after 12 weeks of luseogliflozin administration. Glycosylated hemoglobin significantly decreased from the baseline of 8.2% ± 0.8% to 7.3% ± 0.7% (p < 0.0001). The meal tolerance test demonstrated that luseogliflozin significantly recovered glucose tolerance, accompanied by improved insulin resistance and β-cell function, whereas glucagon secretion was unaffected. Furthermore, GLP-1 secretion was significantly increased after luseogliflozin administration. Thus, luseogliflozin improved metabolic and endocrine profiles accompanied by increased GLP-1 secretion in type 2 diabetic patients without any antidiabetic medication, but did not affect glucagon secretion.
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Affiliation(s)
- Satoru Bando
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Sagamihara 252-0374, Japan
| | - Raishi Ichikawa
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Sagamihara 252-0374, Japan
| | - Tomomi Taguchi
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Sagamihara 252-0374, Japan
| | - Kazumi Fujimoto
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Sagamihara 252-0374, Japan
| | | | | | - Koji Takano
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Sagamihara 252-0374, Japan
| | - Masayoshi Shichiri
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Sagamihara 252-0374, Japan
| | - Takeshi Miyatsuka
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Sagamihara 252-0374, Japan
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2
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Masuo Y, Taniguchi H, Taguchi M, Mishima T, Matsuda T, Kinoshita H. Sexual activity of aged Japanese women who visited a female urological outpatient clinic. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Sugita S, Honda R, Morota T, Kameda S, Sawada H, Tatsumi E, Yamada M, Honda C, Yokota Y, Kouyama T, Sakatani N, Ogawa K, Suzuki H, Okada T, Namiki N, Tanaka S, Iijima Y, Yoshioka K, Hayakawa M, Cho Y, Matsuoka M, Hirata N, Hirata N, Miyamoto H, Domingue D, Hirabayashi M, Nakamura T, Hiroi T, Michikami T, Michel P, Ballouz RL, Barnouin OS, Ernst CM, Schröder SE, Kikuchi H, Hemmi R, Komatsu G, Fukuhara T, Taguchi M, Arai T, Senshu H, Demura H, Ogawa Y, Shimaki Y, Sekiguchi T, Müller TG, Hagermann A, Mizuno T, Noda H, Matsumoto K, Yamada R, Ishihara Y, Ikeda H, Araki H, Yamamoto K, Abe S, Yoshida F, Higuchi A, Sasaki S, Oshigami S, Tsuruta S, Asari K, Tazawa S, Shizugami M, Kimura J, Otsubo T, Yabuta H, Hasegawa S, Ishiguro M, Tachibana S, Palmer E, Gaskell R, Le Corre L, Jaumann R, Otto K, Schmitz N, Abell PA, Barucci MA, Zolensky ME, Vilas F, Thuillet F, Sugimoto C, Takaki N, Suzuki Y, Kamiyoshihara H, Okada M, Nagata K, Fujimoto M, Yoshikawa M, Yamamoto Y, Shirai K, Noguchi R, Ogawa N, Terui F, Kikuchi S, Yamaguchi T, Oki Y, Takao Y, Takeuchi H, Ono G, Mimasu Y, Yoshikawa K, Takahashi T, Takei Y, Fujii A, Hirose C, Nakazawa S, Hosoda S, Mori O, Shimada T, Soldini S, Iwata T, Abe M, Yano H, Tsukizaki R, Ozaki M, Nishiyama K, Saiki T, Watanabe S, Tsuda Y. The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes. Science 2019; 364:252. [PMID: 30890587 DOI: 10.1126/science.aaw0422] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 03/12/2019] [Indexed: 11/02/2022]
Abstract
The near-Earth carbonaceous asteroid 162173 Ryugu is thought to have been produced from a parent body that contained water ice and organic molecules. The Hayabusa2 spacecraft has obtained global multicolor images of Ryugu. Geomorphological features present include a circum-equatorial ridge, east-west dichotomy, high boulder abundances across the entire surface, and impact craters. Age estimates from the craters indicate a resurfacing age of [Formula: see text] years for the top 1-meter layer. Ryugu is among the darkest known bodies in the Solar System. The high abundance and spectral properties of boulders are consistent with moderately dehydrated materials, analogous to thermally metamorphosed meteorites found on Earth. The general uniformity in color across Ryugu's surface supports partial dehydration due to internal heating of the asteroid's parent body.
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Affiliation(s)
- S Sugita
- The University of Tokyo, Tokyo 113-0033, Japan. .,Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan
| | - R Honda
- Kochi University, Kochi 780-8520, Japan
| | - T Morota
- Nagoya University, Nagoya 464-8601, Japan
| | - S Kameda
- Rikkyo University, Tokyo 171-8501, Japan
| | - H Sawada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - E Tatsumi
- The University of Tokyo, Tokyo 113-0033, Japan
| | - M Yamada
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan
| | - C Honda
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - Y Yokota
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,Kochi University, Kochi 780-8520, Japan
| | - T Kouyama
- National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064 Japan
| | - N Sakatani
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - K Ogawa
- Kobe University, Kobe 657-8501, Japan
| | - H Suzuki
- Meiji University, Kawasaki 214-8571, Japan
| | - T Okada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,The University of Tokyo, Tokyo 113-0033, Japan
| | - N Namiki
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - S Tanaka
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - Y Iijima
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - K Yoshioka
- The University of Tokyo, Tokyo 113-0033, Japan
| | - M Hayakawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Cho
- The University of Tokyo, Tokyo 113-0033, Japan
| | - M Matsuoka
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - N Hirata
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - N Hirata
- Kobe University, Kobe 657-8501, Japan
| | - H Miyamoto
- The University of Tokyo, Tokyo 113-0033, Japan
| | - D Domingue
- Planetary Science Institute, Tucson, AZ 85719, USA
| | | | - T Nakamura
- Tohoku University, Sendai 980-8578, Japan
| | - T Hiroi
- Brown University, Providence, RI 02912, USA
| | - T Michikami
- Kindai University, Higashi-Hiroshima 739-2116, Japan
| | - P Michel
- Université Côte d'Azur, Observatoire de la Côte d'Azur, Centre National de le Recherche Scientifique (CNRS), Laboratoire Lagrange, 06304 Nice, France
| | - R-L Ballouz
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,University of Arizona, Tucson, AZ 85705, USA
| | - O S Barnouin
- Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA
| | - C M Ernst
- Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA
| | - S E Schröder
- German Aerospace Center (DLR), Institute of Planetary Research, 12489 Berlin, Germany
| | - H Kikuchi
- The University of Tokyo, Tokyo 113-0033, Japan
| | - R Hemmi
- The University of Tokyo, Tokyo 113-0033, Japan
| | - G Komatsu
- International Research School of Planetary Sciences, Università d'Annunzio, 65127 Pescara, Italy.,Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan
| | - T Fukuhara
- Rikkyo University, Tokyo 171-8501, Japan
| | - M Taguchi
- Rikkyo University, Tokyo 171-8501, Japan
| | - T Arai
- Ashikaga University, Ashikaga 326-8558, Japan
| | - H Senshu
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan
| | - H Demura
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - Y Ogawa
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - Y Shimaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Sekiguchi
- Hokkaido University of Education, Asahikawa 070-8621, Japan
| | - T G Müller
- Max-Planck-Institut für Extraterrestrische Physik, 85748 Garching, Germany
| | - A Hagermann
- University of Stirling, FK9 4LA, Scotland, UK
| | - T Mizuno
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - H Noda
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - K Matsumoto
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - R Yamada
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - Y Ishihara
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - H Ikeda
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - H Araki
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - K Yamamoto
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - S Abe
- Nihon University, Funabashi 274-8501, Japan
| | - F Yoshida
- Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan
| | - A Higuchi
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - S Sasaki
- Osaka University, Toyonaka 560-0043, Japan
| | - S Oshigami
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - S Tsuruta
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - K Asari
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - S Tazawa
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - M Shizugami
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan
| | - J Kimura
- Osaka University, Toyonaka 560-0043, Japan
| | - T Otsubo
- Hitotsubashi University, Tokyo 186-8601, Japan
| | - H Yabuta
- Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - S Hasegawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - M Ishiguro
- Seoul National University, Seoul 08826, Korea
| | - S Tachibana
- The University of Tokyo, Tokyo 113-0033, Japan
| | - E Palmer
- Planetary Science Institute, Tucson, AZ 85719, USA
| | - R Gaskell
- Planetary Science Institute, Tucson, AZ 85719, USA
| | - L Le Corre
- Planetary Science Institute, Tucson, AZ 85719, USA
| | - R Jaumann
- German Aerospace Center (DLR), Institute of Planetary Research, 12489 Berlin, Germany
| | - K Otto
- German Aerospace Center (DLR), Institute of Planetary Research, 12489 Berlin, Germany
| | - N Schmitz
- German Aerospace Center (DLR), Institute of Planetary Research, 12489 Berlin, Germany
| | - P A Abell
- NASA Johnson Space Center, Houston, TX 77058, USA
| | - M A Barucci
- Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA)-Observatoire de Paris, Paris Sciences et Lettres (PSL), Centre National de le Recherche Scientifique (CNRS), Sorbonne Université, Université Paris-Diderot, 92195 Meudon Principal Cedex, France
| | - M E Zolensky
- NASA Johnson Space Center, Houston, TX 77058, USA
| | - F Vilas
- Planetary Science Institute, Tucson, AZ 85719, USA
| | - F Thuillet
- Université Côte d'Azur, Observatoire de la Côte d'Azur, Centre National de le Recherche Scientifique (CNRS), Laboratoire Lagrange, 06304 Nice, France
| | - C Sugimoto
- The University of Tokyo, Tokyo 113-0033, Japan
| | - N Takaki
- The University of Tokyo, Tokyo 113-0033, Japan
| | - Y Suzuki
- The University of Tokyo, Tokyo 113-0033, Japan
| | | | - M Okada
- The University of Tokyo, Tokyo 113-0033, Japan
| | - K Nagata
- National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064 Japan
| | - M Fujimoto
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - M Yoshikawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - Y Yamamoto
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - K Shirai
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - R Noguchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - N Ogawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - F Terui
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - S Kikuchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Yamaguchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Oki
- The University of Tokyo, Tokyo 113-0033, Japan
| | - Y Takao
- The University of Tokyo, Tokyo 113-0033, Japan
| | - H Takeuchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - G Ono
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - Y Mimasu
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - K Yoshikawa
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - T Takahashi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Takei
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - A Fujii
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - C Hirose
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - S Nakazawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - S Hosoda
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - O Mori
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Shimada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - S Soldini
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Iwata
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - M Abe
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - H Yano
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - R Tsukizaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - M Ozaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - K Nishiyama
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Saiki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - S Watanabe
- Nagoya University, Nagoya 464-8601, Japan.,Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Tsuda
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
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4
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Okada S, Morimoto T, Ogawa H, Sakuma M, Matsumoto C, Soejima H, Nakayama M, Doi N, Jinnouchi H, Waki M, Masuda I, Saito Y, Miwa K, Akahoshi K, Misumi K, Araki H, Mitsudo Y, Kondo N, Ashihara K, Yumoto S, Horimoto M, Doi O, Doijiri K, Fukami R, Shimabukuro M, Egusa G, Goto K, Hanaoka Y, Kimura Y, Haraguchi Y, Haraguchi O, Hasegawa A, Shioya Y, Shioya Y, Tanaka E, Yamada K, Atsumi T, Tanazawa S, Horio Y, Ichihara S, Yasuda I, Ikeda T, Ikemura M, Imamoto C, Iseri Y, Iwai K, Okamoto S, Sugiyama S, Kamura M, Kan H, Kiyota M, Kawamura K, Ono T, Koga T, Kinuwaki E, Naito H, Kozuma K, Kudou K, Morikami Y, Yasue H, Mizuno Y, Fujimoto H, Matsuyama K, Fujii H, Kamijikkoku S, Kuwahara T, Takaoka K, Machii K, Maeda K, Mahara K, Maki A, Manda N, Marutsuka K, Sameshima N, Gi T, Matsunaga T, Matsuo S, Okubo H, Minagawa F, Minoda K, Miyata J, Matsuo T, Momosaki S, Munakata T, Nakamura T, Nagano H, Goshi K, Sugimoto K, Naomi S, Nasu T, Tanaka H, Sonoda R, Kajiwara K, Odo T, Ogata H, Ogihara M, Ogura T, Oka K, Kawashima E, Oshima E, Ozaki K, Ozawa S, Shono H, Sakamoto Y, Sakurai N, Wakabayashi C, Sawada T, Shibata J, Shimono H, Iemura A, Matsutani A, Suefuji H, Sugiyama H, Hokamaki J, Komori K, Kinoshita Y, Murakami H, Hashiguchi J, Hashiguchi Y, Sawai K, Hifumi A, Seo K, Toihata M, Tokube K, Ogawa H, Tomita F, Taguchi M, Tsubokura T, Tsuchiya T, Tsuda K, Tsurusaki R, Obata K, Watanabe K, Hayasida R, Ishibashi Y, Osamura Y, Yamanaka Y, Sonoda K, Iwaoka T, Yokota H, Yoshinari M, Abe N, Ando N, Bando H, Takami T, Doi M, Fujii Y, Fukuda M, Fukuoka Y, Hamano M, Takaoka M, Hasegawa H, Yabuta I, Higami K, Higami S, Yasuno A, Fujinaga Y, Onishi Y, Yoshimura K, Minami S, Nakashima T, Horie H, Horii K, Matsumura N, Ikuno T, Katsuyama Y, Uemura S, Kikukawa M, Kanauchi M, Kuzuya H, Iwasaki A, Koutani T, Makino H, Miki H, Misugi S, Naito M, Naito M, Nakano Y, Nakatani A, Nakatani F, Horii M, Yabuta M, Seno A, Kawata H, Samejima K, Onoue K, Kawakami R, Nakano T, Ueda T, Soeda T, Kita Y, Inoue F, Yamano S, Iwama H, Sakan H, Suzuki M, Kagoshima T, Nakai T, Hashimoto T, Nishitani Y, Kobayashi Y, Hoda K, Fujiki K, Uejima J, Morikawa Y, Kawano T, Yamada H, Nishimoto K, Ohsumi K, Ote N, Oya A, Nishiura K, Masuda J, Ban K, Kyoda Y, Sawada I, Sawada Y, Okada K, Yazaki A, Hanatani M, Sutani T, Hiramori Y, Tanaka Y, Igaki T, Tomioka Y, Shiiki H, Sugihara K, Hayashi M, Sasaki Y, Matsukura Y, Ueda M, Ueyama M, Uyama H, Yamada H, Yamaga K, Nakajima T, Yoshimoto K, Yoshimura M. Effect of Aspirin on Cancer Chemoprevention in Japanese Patients With Type 2 Diabetes: 10-Year Observational Follow-up of a Randomized Controlled Trial. Diabetes Care 2018; 41:1757-1764. [PMID: 29909377 DOI: 10.2337/dc18-0368] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 05/07/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE This study analyzed the efficacy of low-dose aspirin in cancer chemoprevention in patients with diabetes. RESEARCH DESIGN AND METHODS This study was a posttrial follow-up of the Japanese Primary Prevention of Atherosclerosis with Aspirin for Diabetes (JPAD) trial. Participants in the JPAD trial (2,536 Japanese patients with type 2 diabetes and without preexisting cardiovascular disease) were randomly allocated to receive aspirin (81 or 100 mg daily) or no aspirin. After that trial ended in 2008, we followed up with the participants until 2015, with no attempt to change the previously assigned therapy. The primary end point was total cancer incidence. We investigated the effect of low-dose aspirin on cancer incidence. RESULTS During the median follow-up period of 10.7 years, a total of 318 cancers occurred. The cancer incidence was not significantly different between the aspirin and no-aspirin groups (log-rank, P = 0.4; hazard ratio [HR], 0.92; 95% CI, 0.73-1.14; P = 0.4). In subgroup analyses, aspirin did not affect cancer incidence in men, women, or participants aged ≥65 years. However, it decreased cancer incidence in participants aged <65 years (log-rank, P = 0.05; HR, 0.67; 95% CI, 0.44-0.99; P = 0.048). After adjusting for sex, hemoglobin A1c, smoking status, and administration of metformin and statins, aspirin significantly reduced cancer incidence in participants aged <65 years (adjusted HR, 0.66; 95% CI, 0.43-0.99; P = 0.04). CONCLUSIONS Low-dose aspirin did not reduce cancer incidence in Japanese patients with type 2 diabetes.
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Affiliation(s)
- Sadanori Okada
- Department of Diabetology, Nara Medical University, Kashihara, Nara, Japan
- Department of Cardiovascular Medicine, Nara Medical University, Kashihara, Nara, Japan
| | - Takeshi Morimoto
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Hisao Ogawa
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Mio Sakuma
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Chisa Matsumoto
- Department of Clinical Epidemiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Hirofumi Soejima
- Department of Cardiology, Graduate School of Medical Science, Kumamoto University, Chuo, Kumamoto, Japan
| | | | - Naofumi Doi
- Department of Cardiovascular Medicine, Nara Prefectural Seiwa Medical Center, Sango, Ikoma, Nara, Japan
| | - Hideaki Jinnouchi
- Department of Internal Medicine, Jinnouchi Hospital Diabetes Care Center, Chuo, Kumamoto, Japan
| | - Masako Waki
- Department of Internal Medicine, Shizuoka City Shizuoka Hospital, Aoi, Shizuoka, Japan
| | - Izuru Masuda
- Medical Examination Center, Takeda Hospital, Shimogyo, Kyoto, Japan
| | - Yoshihiko Saito
- Department of Cardiovascular Medicine, Nara Medical University, Kashihara, Nara, Japan
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5
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Yokoyama Y, Yamasaki Y, Taguchi M, Hirata Y, Takubo K, Miyawaki J, Harada Y, Asakura D, Fujioka J, Nakamura M, Daimon H, Kawasaki M, Tokura Y, Wadati H. Tensile-Strain-Dependent Spin States in Epitaxial LaCoO_{3} Thin Films. Phys Rev Lett 2018; 120:206402. [PMID: 29864291 DOI: 10.1103/physrevlett.120.206402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Indexed: 06/08/2023]
Abstract
The spin states of Co^{3+} ions in perovskite-type LaCoO_{3}, governed by the complex interplay between the electron-lattice interactions and the strong electron correlations, still remain controversial due to the lack of experimental techniques which can directly detect them. In this Letter, we revealed the tensile-strain dependence of spin states, i.e., the ratio of the high- and low-spin states, in epitaxial thin films and a bulk crystal of LaCoO_{3} via resonant inelastic soft x-ray scattering. A tensile strain as small as 1.0% was found to realize different spin states from that in the bulk.
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Affiliation(s)
- Y Yokoyama
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
| | - Y Yamasaki
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
- National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan
| | - M Taguchi
- Nara Institute of Science and Technology (NAIST), 8916-5, Takayama, Ikoma, Nara 630-0192, Japan
| | - Y Hirata
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
| | - K Takubo
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - J Miyawaki
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - Y Harada
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - D Asakura
- Research Institute for Energy Conservation, National Institute of Advance Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba 305-8568, Japan
| | - J Fujioka
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
| | - M Nakamura
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - H Daimon
- Nara Institute of Science and Technology (NAIST), 8916-5, Takayama, Ikoma, Nara 630-0192, Japan
| | - M Kawasaki
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - Y Tokura
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - H Wadati
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
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6
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Kuwabara M, Taguchi M, Yoshioka K, Ishida T, de Oliveira N, Ito K, Kameda S, Suzuki F, Yoshikawa I. Evaluation of hydrogen absorption cells for observations of the planetary coronas. Rev Sci Instrum 2018; 89:023111. [PMID: 29495866 DOI: 10.1063/1.5007812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 01/30/2018] [Indexed: 06/08/2023]
Abstract
Newly designed Lyman-alpha absorption cells for imaging hydrogen planetary corona were characterized using an ultra high resolution Fourier transform spectrometer installed on the DESIRS (Dichroïsme Et Spectroscopie par Interaction avec le Rayonnement Synchrotron) beamline of Synchrotron SOLEIL in France. The early absorption cell installed in the Japanese Mars orbiter NOZOMI launched in 1998 had not been sufficiently optimized due to its short development time. The new absorption cells are equipped with the ability to change various parameters, such as filament shape, applied power, H2 gas pressure, and geometrical configuration. We found that the optical thickness of the new absorption cell was ∼4 times higher than the earlier one at the center wavelength of Lyman-alpha absorption, by optimizing the condition to promote thermal dissociation of H2 molecules into two H atoms on a hot tungsten filament. The Doppler temperature of planetary coronas could be determined with an accuracy better than 100 K with the performance of the newly developed absorption cell.
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Affiliation(s)
- M Kuwabara
- Department of Complexity Science and Engineering, University of Tokyo, Chiba, Japan
| | - M Taguchi
- Department of Physics, College of Science, Rikkyo University, Tokyo, Japan
| | - K Yoshioka
- Department of Complexity Science and Engineering, University of Tokyo, Chiba, Japan
| | - T Ishida
- Department of Physics, College of Science, Rikkyo University, Tokyo, Japan
| | - N de Oliveira
- Ligne DESIRS, Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - K Ito
- Ligne DESIRS, Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - S Kameda
- Department of Physics, College of Science, Rikkyo University, Tokyo, Japan
| | - F Suzuki
- Department of Complexity Science and Engineering, University of Tokyo, Chiba, Japan
| | - I Yoshikawa
- Department of Complexity Science and Engineering, University of Tokyo, Chiba, Japan
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7
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Miyata-Nozaka Y, Zain SM, Taguchi M, Shigeyama M, Isobe T, Hanioka N. Carbamazepine 10,11-epoxidation in human liver microsomes: influence of the CYP3A5*3 polymorphism. Pharmazie 2017; 72:747-750. [PMID: 29441960 DOI: 10.1691/ph.2017.7754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Carbamazepine (CBZ) is a commonly prescribed antiepileptic drug, and is mainly metabolized to 10,11-CBZ epoxide in humans. Its biotransformation is catalyzed by cytochrome P450 (CYP) enzymes, with the predominant isoforms being CYP3A4 and CYP3A5. In the present study, the effects of the CYP3A5*3 (rs776746) polymorphism on CBZ 10,11-epoxidation in human liver microsomes genotyped as CYP3A5*3 were examined using a kinetic analysis. The kinetics for CBZ 10,11-epoxidation fit the Hill model with n of approximately 1.9-2.1 in all liver microsomes of the wild-type (CYP3A5*1/*1) and heterozygous (CYP3A5*1/*3) and homozygous (CYP3A5*3/*3) variants. The S50, Vmax, and CLmax values of wild-type liver microsomes were 263-327 μM, 793-1590 pmol/min/mg protein, and 1.51-2.95 μL/min/mg protein, respectively. The Vmax and CLmax values of liver microsomes of the heterozygous variant were approximately 15-40% those of wild-type liver microsomes. On the other hand, the Vmax and CLmax values of liver microsomes of the homozygous variant were more similar to those of the wild-type than the heterozygous variant. These results suggest that the CYP3A5*3 polymorphism has a negligible effect on CBZ 10,11-epoxidation in an in vitro system using human liver microsomes.
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8
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Ichimura H, Kawamura T, Nakaoka K, Kobayashi K, Taguchi M, Nawa T, Kobayashi N, Kikuchi S, Goto Y, Onizuka M, Sato Y, Sakata A, Noguchi M. P3.16-039 Right Upper Lobectomy with SVC Reconstruction after Induction Chemoradiotherapy for a Patient with Bulky N2 NSCLC. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Takamasu T, Wada M, Taguchi M, Goto H, Taniguchi H. MON-P271: Effect of Intervention of Childhood Cancer Nutrition Project Team for Acute Lymphocytic Leukemia. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30818-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Pincelli T, Lollobrigida V, Borgatti F, Regoutz A, Gobaut B, Schlueter C, Lee TL, Payne DJ, Oura M, Tamasaku K, Petrov AY, Graziosi P, Granozio FM, Cavallini M, Vinai G, Ciprian R, Back CH, Rossi G, Taguchi M, Daimon H, van der Laan G, Panaccione G. Quantifying the critical thickness of electron hybridization in spintronics materials. Nat Commun 2017; 8:16051. [PMID: 28714466 PMCID: PMC5520016 DOI: 10.1038/ncomms16051] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 05/15/2017] [Indexed: 11/09/2022] Open
Abstract
In the rapidly growing field of spintronics, simultaneous control of electronic and magnetic properties is essential, and the perspective of building novel phases is directly linked to the control of tuning parameters, for example, thickness and doping. Looking at the relevant effects in interface-driven spintronics, the reduced symmetry at a surface and interface corresponds to a severe modification of the overlap of electron orbitals, that is, to a change of electron hybridization. Here we report a chemically and magnetically sensitive depth-dependent analysis of two paradigmatic systems, namely La1−xSrxMnO3 and (Ga,Mn)As. Supported by cluster calculations, we find a crossover between surface and bulk in the electron hybridization/correlation and we identify a spectroscopic fingerprint of bulk metallic character and ferromagnetism versus depth. The critical thickness and the gradient of hybridization are measured, setting an intrinsic limit of 3 and 10 unit cells from the surface, respectively, for (Ga,Mn)As and La1−xSrxMnO3, for fully restoring bulk properties. Surface versus bulk effects in electronic structure of spintronics materials are crucial to their applications but are yet well understood. Here the authors experimentally determine the critical thickness that defines the crossover of electron hybridization between surface and bulk for two prototype spintronics materials.
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Affiliation(s)
- T Pincelli
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy.,Dipartimento di Fisica, Università di Milano, Via Celoria 16, Milano I-20133, Italy
| | - V Lollobrigida
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy.,Dipartimento di Scienze, Università degli Studi Roma Tre, Via della Vasca Navale 84, Roma I-00146, Italy
| | - F Borgatti
- Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, Bologna I-40129, Italy
| | - A Regoutz
- Department of Materials, Imperial College London, South Kensington, London SW7 2AZ, UK
| | - B Gobaut
- Sincrotrone Trieste S.C.p.A., S.S. 14 Km 163.5, Area Science Park, Trieste 34149, Italy
| | - C Schlueter
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - T-L Lee
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - D J Payne
- Department of Materials, Imperial College London, South Kensington, London SW7 2AZ, UK
| | - M Oura
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - K Tamasaku
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - A Y Petrov
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
| | - P Graziosi
- Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, Bologna I-40129, Italy
| | - F Miletto Granozio
- CNR-SPIN, Complesso Universitario Monte S. Angelo, Napoli 80126, Italy.,Dipartimento di Fisica, Università 'Federico II' di Napoli, Napoli, 80126, Italy
| | - M Cavallini
- Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, Bologna I-40129, Italy
| | - G Vinai
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
| | - R Ciprian
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
| | - C H Back
- Institut fur Experimentelle Physik, Universitat Regensburg, Regensburg D-93040, Germany
| | - G Rossi
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy.,Dipartimento di Fisica, Università di Milano, Via Celoria 16, Milano I-20133, Italy
| | - M Taguchi
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.,Nara Institute of Science and Technology, 8-9165 Takayama, Ikoma, Nara 630-0192, Japan
| | - H Daimon
- Nara Institute of Science and Technology, 8-9165 Takayama, Ikoma, Nara 630-0192, Japan
| | - G van der Laan
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - G Panaccione
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
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11
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Hara S, Taguchi M. SIGNS OF EXACERBATION DETECTED BY FAMILY CAREGIVERS OF DEMENTED ELDERLY WITH CHRONIC HEART FAILURE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Hara
- Shimane University Faculty of Medicin, Izumo-shi, Japan,
| | - M. Taguchi
- Shimane Prefectural Central Hospital, Izumo-shi, Japan
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12
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Takeyama M, Nogami K, Matsumoto T, Taguchi M, Yada K, Okahashi N, Amano I, Kimura H, Shima M. Possible assessment of coagulation function and haemostasis therapy using comprehensive coagulation assays in a patient with acquired haemophilia A. Haemophilia 2016; 23:e46-e50. [DOI: 10.1111/hae.13134] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2016] [Indexed: 11/29/2022]
Affiliation(s)
- M. Takeyama
- Department of Pediatrics; Nara Medical University; Kashihara Nara Japan
| | - K. Nogami
- Department of Pediatrics; Nara Medical University; Kashihara Nara Japan
| | - T. Matsumoto
- Course of Hemophilia Treatment and Pathology; Nara Medical University; Kashihara Nara Japan
| | - M. Taguchi
- Department of Pediatrics; Nara Medical University; Kashihara Nara Japan
| | - K. Yada
- Department of Pediatrics; Nara Medical University; Kashihara Nara Japan
| | - N. Okahashi
- The 2nd Department of Internal Medicine; Nara Medical University; Kashihara Nara Japan
| | - I. Amano
- The 2nd Department of Internal Medicine; Nara Medical University; Kashihara Nara Japan
| | - H. Kimura
- The 2nd Department of Internal Medicine; Nara Medical University; Kashihara Nara Japan
| | - M. Shima
- Department of Pediatrics; Nara Medical University; Kashihara Nara Japan
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13
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Taguchi M, Tsutsui S, Nakamura O. Differential count and time-course analysis of the cellular composition of coelomocyte aggregate of the Japanese sea cucumber Apostichopus japonicus. Fish Shellfish Immunol 2016; 58:203-209. [PMID: 27633669 DOI: 10.1016/j.fsi.2016.06.060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 06/22/2016] [Accepted: 06/27/2016] [Indexed: 06/06/2023]
Abstract
Echinoderms have many types of coelomocytes, which have been known to form aggregates immediately after they are removed from the coelom. To assess the roles that each type of coelomocyte plays in aggregate formation, cellular components of coelomocyte aggregates of the Japanese sea cucumber, Apostichopus japonicus, were investigated. The coelomocytes were tentatively classified into 12 types based on May-Grunwald/Giemsa staining. After the coelom was incubated for 30 min or 6 h, the aggregates were disaggregated completely with 200 mM EDTA. Differential counts of the dissociated cells indicated that the largest component of the aggregates was amoebocytes (67.8%) and the second-largest component of the aggregates incubated 30 min was a type of basophilic granulocyte. In the 6h-incubated aggregates, the fraction of amoebocytes decreased to 59.0%, while that of lymphoid cells significantly increased, which suggests that lymphoid cells participate in late-stage aggregation. After 24-h incubation, only a portion of the aggregated cells could be disaggregated with EDTA. After 48 h, most of the cells could not be detached from the aggregates. Microscopy of frozen sections of the aggregates after 6-h incubation revealed that amoebocytes constructed a mesh-like structure to which other types of cells adhered. After 48 h, the borders of the cells and the intracellular granules were not recognizable. In time-lapse microscopy, the aggregates were observed to move on a glass slide, which suggests that aggregates can "crawl" on the intraluminal surface of the coelom toward, for example, injured regions in the body of the sea cucumber.
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Affiliation(s)
- M Taguchi
- School of Marine Biosciences, Kitasato University, 252-0373, Kanagawa, Japan
| | - S Tsutsui
- School of Marine Biosciences, Kitasato University, 252-0373, Kanagawa, Japan
| | - O Nakamura
- School of Marine Biosciences, Kitasato University, 252-0373, Kanagawa, Japan.
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14
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Taguchi M, Schwalb N, Rong Y, Vanegas DC, Garland N, Tan M, Yamaguchi H, Claussen JC, McLamore ES. pulSED: pulsed sonoelectrodeposition of fractal nanoplatinum for enhancing amperometric biosensor performance. Analyst 2016; 141:3367-78. [DOI: 10.1039/c6an00069j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A technique for deposition of fractal nanometal as a transducer in electrochemical sensing is described. The effect(s) of duty cycle and deposition time were explored, and two sensors are demonstrated.
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Affiliation(s)
- M. Taguchi
- Department of Agricultural & Biological Engineering
- Institute of Food & Agricultural Sciences
- University of Florida
- USA
| | - N. Schwalb
- Department of Agricultural & Biological Engineering
- Institute of Food & Agricultural Sciences
- University of Florida
- USA
| | - Y. Rong
- Department of Agricultural & Biological Engineering
- Institute of Food & Agricultural Sciences
- University of Florida
- USA
| | - D. C. Vanegas
- Department of Agricultural & Biological Engineering
- Institute of Food & Agricultural Sciences
- University of Florida
- USA
- Department of Food Engineering
| | - N. Garland
- Department of Mechanical Engineering
- Iowa State University
- USA
| | - M. Tan
- Department of Mechanical and Aerospace Engineering
- University of Florida
- USA
| | - H. Yamaguchi
- Department of Mechanical and Aerospace Engineering
- University of Florida
- USA
| | - J. C. Claussen
- Department of Mechanical Engineering
- Iowa State University
- USA
| | - E. S. McLamore
- Department of Agricultural & Biological Engineering
- Institute of Food & Agricultural Sciences
- University of Florida
- USA
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15
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Taguchi M, Chainani A, Ueda S, Matsunami M, Ishida Y, Eguchi R, Tsuda S, Takata Y, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Daimon H, Todo S, Tanaka H, Oura M, Senba Y, Ohashi H, Shin S. Temperature Dependence of Magnetically Active Charge Excitations in Magnetite across the Verwey Transition. Phys Rev Lett 2015; 115:256405. [PMID: 26722935 DOI: 10.1103/physrevlett.115.256405] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Indexed: 05/12/2023]
Abstract
We study the electronic structure of bulk single crystals and epitaxial films of Fe_{3}O_{4}. Fe 2p core level spectra show clear differences between hard x-ray (HAX) and soft x-ray photoemission spectroscopy (PES). The bulk-sensitive spectra exhibit temperature (T) dependence across the Verwey transition, which is missing in the surface-sensitive spectra. By using an extended impurity Anderson full-multiplet model-and in contrast to an earlier peak assignment-we show that the two distinct Fe species (A and B site) and the charge modulation at the B site are responsible for the newly found double peaks in the main peak above T_{V} and its T-dependent evolution. The Fe 2p HAXPES spectra show a clear magnetic circular dichroism (MCD) in the metallic phase of magnetized 100-nm-thick films. The model calculations also reproduce the MCD and identify the contributions from magnetically distinct A and B sites. Valence band HAXPES shows a finite density of states at E_{F} for the polaronic half metal with a remnant order above T_{V} and a clear gap formation below T_{V}. The results indicate that the Verwey transition is driven by changes in the strongly correlated and magnetically active B-site electronic states, consistent with resistivity and optical spectra.
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Affiliation(s)
- M Taguchi
- Material Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - A Chainani
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - S Ueda
- National Institute for Materials Science (NIMS), SPring-8, Sayo, Hyogo 679-5148, Japan
| | - M Matsunami
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Y Ishida
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - R Eguchi
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - S Tsuda
- National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0003, Japan
| | - Y Takata
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - M Yabashi
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - K Tamasaku
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - Y Nishino
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - T Ishikawa
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - H Daimon
- Material Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
| | - S Todo
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - H Tanaka
- ISIR-Sanken, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - M Oura
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - Y Senba
- JASRI/SPring-8, Sayo, Sayo, Hyogo 679-5198, Japan
| | - H Ohashi
- JASRI/SPring-8, Sayo, Sayo, Hyogo 679-5198, Japan
| | - S Shin
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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16
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Yamamoto S, Taguchi M, Someya T, Kubota Y, Ito S, Wadati H, Fujisawa M, Capotondi F, Pedersoli E, Manfredda M, Raimondi L, Kiskinova M, Fujii J, Moras P, Tsuyama T, Nakamura T, Kato T, Higashide T, Iwata S, Yamamoto S, Shin S, Matsuda I. Ultrafast spin-switching of a ferrimagnetic alloy at room temperature traced by resonant magneto-optical Kerr effect using a seeded free electron laser. Rev Sci Instrum 2015; 86:083901. [PMID: 26329205 DOI: 10.1063/1.4927828] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ultrafast magnetization reversal of a ferrimagnetic metallic alloy GdFeCo was investigated by time-resolved resonant magneto-optical Kerr effect measurements using a seeded free electron laser. The GdFeCo alloy was pumped by a linearly polarized optical laser pulse, and the following temporal evolution of the magnetization of Fe in GdFeCo was element-selectively traced by a probe free electron laser pulse with a photon energy tuned to the Fe M-edge. The results have been measured using rotating analyzer ellipsometry method and confirmed magnetization switching caused by ultrafast heating.
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Affiliation(s)
- Sh Yamamoto
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - M Taguchi
- Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
| | - T Someya
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Y Kubota
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - S Ito
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - H Wadati
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - M Fujisawa
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - F Capotondi
- Elettra-Sincrotrone Trieste, SS 14 - km 163.5, I-34149 Basovizza, Trieste, Italy
| | - E Pedersoli
- Elettra-Sincrotrone Trieste, SS 14 - km 163.5, I-34149 Basovizza, Trieste, Italy
| | - M Manfredda
- Elettra-Sincrotrone Trieste, SS 14 - km 163.5, I-34149 Basovizza, Trieste, Italy
| | - L Raimondi
- Elettra-Sincrotrone Trieste, SS 14 - km 163.5, I-34149 Basovizza, Trieste, Italy
| | - M Kiskinova
- Elettra-Sincrotrone Trieste, SS 14 - km 163.5, I-34149 Basovizza, Trieste, Italy
| | - J Fujii
- Laboratorio TASC, Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, I-34012 Basovizza, Trieste, Italy
| | - P Moras
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy
| | - T Tsuyama
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - T Nakamura
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - T Kato
- Department of Electrical Engineering and Computer Science, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - T Higashide
- Department of Electrical Engineering and Computer Science, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - S Iwata
- Division of Integrated Research Projects, EcoTopia Science Institute, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - S Yamamoto
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - S Shin
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - I Matsuda
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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17
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Kanbe K, Chiba J, Inoue Y, Taguchi M, Yabuki A. SAT0019 SDF-1/CXCR4 Is associated with the Disease Activity and Bone and Joint Destruction in Patients with Rheumatoid Arthritis Treated with Golimumab. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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18
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Yamashita S, Iwamatsu K, Maehashi Y, Taguchi M, Hata K, Muroya Y, Katsumura Y. Sequential radiation chemical reactions in aqueous bromide solutions: pulse radiolysis experiment and spur model simulation. RSC Adv 2015. [DOI: 10.1039/c5ra03101j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Pulse radiolysis experiments were carried out to observe transient absorptions of reaction intermediates produced in N2O- and Ar-saturated aqueous solutions containing 0.9–900 mM NaBr.
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Affiliation(s)
- S. Yamashita
- Nuclear Professional School
- School of Engineering
- the University of Tokyo
- Tokai-mura, Naka-gun
- Japan
| | - K. Iwamatsu
- Department of Nuclear Engineering and Management
- School of Engineering
- the University of Tokyo
- Bunkyo-ku
- Japan
| | - Y. Maehashi
- Department of Nuclear Engineering and Management
- School of Engineering
- the University of Tokyo
- Bunkyo-ku
- Japan
| | - M. Taguchi
- Quantum Beam Science Center
- Japan Atomic Energy Agency
- Takasaki
- Japan
| | - K. Hata
- Nuclear Safety Research Center
- Japan Atomic Energy Agency
- Tokai-mura, Naka-gun
- Japan
| | - Y. Muroya
- Department of Beam Materials Science
- Institute of Scientific and Industrial Research
- Osaka University
- Ibaraki
- Japan
| | - Y. Katsumura
- Nuclear Professional School
- School of Engineering
- the University of Tokyo
- Tokai-mura, Naka-gun
- Japan
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Yada T, Damdindorj B, Rita RS, Kurashina T, Ando A, Taguchi M, Koizumi M, Sone H, Nakata M, Kakei M, Dezaki K. Ghrelin signalling in β-cells regulates insulin secretion and blood glucose. Diabetes Obes Metab 2014; 16 Suppl 1:111-7. [PMID: 25200304 DOI: 10.1111/dom.12344] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Accepted: 04/20/2014] [Indexed: 12/13/2022]
Abstract
Insulin secretion from pancreatic islet β-cells is stimulated by glucose. Glucose-induced insulin release is potentiated or suppressed by hormones and neural substances. Ghrelin, an acylated 28-amino acid peptide, was isolated from the stomach in 1999 as the endogenous ligand for the growth hormone (GH) secretagogue-receptor (GHS-R). Circulating ghrelin is produced predominantly in the stomach and to a lesser extent in the intestine, pancreas and brain. Ghrelin, initially identified as a potent stimulator of GH release and feeding, has been shown to suppress glucose-induced insulin release. This insulinostatic action is mediated by Gα(i2) subtype of GTP-binding proteins and delayed outward K⁺ (Kv) channels. Interestingly, ghrelin is produced in pancreatic islets. The ghrelin originating from islets restricts insulin release and thereby upwardly regulates the systemic glucose level. Furthermore, blockade or elimination of ghrelin enhances insulin release, which can ameliorate glucose intolerance in high-fat diet fed mice and ob/ob mice. This review focuses on the insulinostatic action of ghrelin, its signal transduction mechanisms in islet β-cells, ghrelin's status as an islet hormone, physiological roles of ghrelin in regulating systemic insulin levels and glycaemia, and therapeutic potential of the ghrelin-GHS-R system as the target to treat type 2 diabetes.
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Affiliation(s)
- T Yada
- Division of Integrative Physiology, Department of Physiology, Jichi Medical University School of Medicine, Tochigi, Japan
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Chaturvedi P, Vanegas D, Taguchi M, Burrs S, Sharma P, McLamore E. A nanoceria–platinum–graphene nanocomposite for electrochemical biosensing. Biosens Bioelectron 2014; 58:179-85. [DOI: 10.1016/j.bios.2014.02.021] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/25/2014] [Accepted: 02/10/2014] [Indexed: 11/15/2022]
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21
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Usui T, Tanaka Y, Nakajima H, Taguchi M, Chainani A, Oura M, Shin S, Katayama N, Sawa H, Wakabayashi Y, Kimura T. Observation of quadrupole helix chirality and its domain structure in DyFe3(BO3)4. Nat Mater 2014; 13:611-618. [PMID: 24705382 DOI: 10.1038/nmat3942] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 03/11/2014] [Indexed: 06/03/2023]
Abstract
Resonant X-ray diffraction (RXD) uses X-rays in the vicinity of a specific atomic absorption edge and is a powerful technique for studying symmetry breaking by motifs of various multipole moments, such as electric monopoles (charge), magnetic dipoles (spin) and electric quadrupoles (orbital). Using circularly polarized X-rays, this technique has been developed to verify symmetry breaking effects arising from chirality, the asymmetry of an object upon its mirroring. Chirality plays a crucial role in the emergence of functionalities such as optical rotatory power and multiferroicity. Here we apply spatially resolved RXD to reveal the helix chirality of Dy 4f electric quadrupole orientations and its domain structure in DyFe3(BO3)4, which shows a reversible phase transition into an enantiomorphic space-group pair. The present study provides evidence for a helix chiral motif of quadrupole moments developed in crystallographic helix chirality.
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Affiliation(s)
- T Usui
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Y Tanaka
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - H Nakajima
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - M Taguchi
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - A Chainani
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - M Oura
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - S Shin
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - N Katayama
- Department of Applied Physics, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - H Sawa
- Department of Applied Physics, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Y Wakabayashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - T Kimura
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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22
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Sagisaka T, Kurokawa S, Sakai A, Yamashita KI, Taguchi M, Asano M, Sugiura KI. Conductance of Au/1,4-benzenedicarbothioamide/Au molecular junctions: A proposal for a potential linker. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.01.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Yamaki S, Kouno J, Nishimura D, Nagashima M, Takechi M, Sato K, Abe K, Abe Y, Fukuda M, Furuki H, Hachiuma I, Homma A, Ichihashi N, Ichikawa C, Inaba N, Ito T, Iwamoto K, Izumikawa T, Kamisho Y, Kikuchi N, Kinno S, Kitagawa A, Kojima T, Kuboki T, Mihara M, Miyazawa S, Momota S, Morita Y, Nagae D, Nakamura Y, Namihira K, Nishikiori R, Nishizuka I, Niwa T, Ogura M, Ohkuma Y, Ohtsubo T, Okada S, Ohno J, Ozawa A, Saito Y, Sakai T, Sato S, Sera D, Suzaki F, Suzuki S, Suzuki S, Suzuki T, Taguchi M, Uenishi H, Wakabayashi M, Watanabe D, Yaguchi M, Yasumoto S, Yamaguchi T. Charge-changing interactions probing point-proton radii of nuclei. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146603099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Hiroki A, Sato Y, Nagasawa N, Ohta A, Seito H, Yamabayashi H, Yamamoto T, Taguchi M, Tamada M, Kojima T. Preparation of polymer gel dosimeters based on less toxic monomers and gellan gum. Phys Med Biol 2013; 58:7131-41. [PMID: 24052135 DOI: 10.1088/0031-9155/58/20/7131] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
New polymer gel dosimeters consisting of 2-hydroxyethyl methacrylate (HEMA), triethylene glycol monoethyl ether monomethacrylate (TGMEMA), polyethylene glycol 400 dimethacrylate (9G), tetrakis (hydroxymethyl) phosphonium chloride as an antioxidant, and gellan gum as a gel matrix were prepared. They were optically analyzed by measuring absorbance to evaluate a dose response. The absorbance of the polymer gel dosimeters that were exposed to (60)Co γ-rays increased with increasing dose. The dosimeters comprising HEMA and 9G showed a linear increase in absorbance in the dose range from 0 to 10 Gy. The dose response depended on the 9G concentration. For others comprising HEMA, 9G and TGMEMA, the absorbance of the polymer gel dosimeters drastically increased above a certain dose, and then leveled off up to 10 Gy. The optical variations in these polymer gel dosimeters were also induced by x-irradiation from Cyberknife radiotherapy equipment. Furthermore, the exposed region of the latter polymer gel dosimeter exhibited a thermo-responsive behavior.
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Affiliation(s)
- A Hiroki
- Japan Atomic Energy Agency, Takasaki, Gunma, 370-1292, Japan
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25
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Chaturvedi P, Taguchi M, Burrs SL, Hauser BA, Salim WWAW, Claussen JC, McLamore ES. Emerging technologies for non-invasive quantification of physiological oxygen transport in plants. Planta 2013; 238:599-614. [PMID: 23846103 DOI: 10.1007/s00425-013-1926-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 06/26/2013] [Indexed: 06/02/2023]
Abstract
Oxygen plays a critical role in plant metabolism, stress response/signaling, and adaptation to environmental changes (Lambers and Colmer, Plant Soil 274:7-15, 2005; Pitzschke et al., Antioxid Redox Signal 8:1757-1764, 2006; Van Breusegem et al., Plant Sci 161:405-414, 2001). Reactive oxygen species (ROS), by-products of various metabolic pathways in which oxygen is a key molecule, are produced during adaptation responses to environmental stress. While much is known about plant adaptation to stress (e.g., detoxifying enzymes, antioxidant production), the link between ROS metabolism, O2 transport, and stress response mechanisms is unknown. Thus, non-invasive technologies for measuring O2 are critical for understanding the link between physiological O2 transport and ROS signaling. New non-invasive technologies allow real-time measurement of O2 at the single cell and even organelle levels. This review briefly summarizes currently available (i.e., mainstream) technologies for measuring O2 and then introduces emerging technologies for measuring O2. Advanced techniques that provide the ability to non-invasively (i.e., non-destructively) measure O2 are highlighted. In the near future, these non-invasive sensors will facilitate novel experimentation that will allow plant physiologists to ask new hypothesis-driven research questions aimed at improving our understanding of physiological O2 transport.
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Affiliation(s)
- P Chaturvedi
- Agricultural and Biological Engineering Department, University of Florida, Gainesville, USA
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26
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Naka T, Sato K, Taguchi M, Shirakawa N, Nakane T, Ishikawa F, Yamada Y, Takaesu Y, Nakama T, Matsushita A. Characteristics of a granular electronic system in Heusler-type Fe2+xV1-xAl. J Phys Condens Matter 2013; 25:275603. [PMID: 23774462 DOI: 10.1088/0953-8984/25/27/275603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report comprehensive measurements of the magnetic, transport, and thermal properties of the Heusler-type compound Fe2+xV1-xAl, with x values near the ferromagnetic quantum critical point, xc ∼ 0.05. At T ∼ 60 K, a prominent Schottky-like anomaly appeared in the specific heat; this anomaly was correlated with a smaller pseudo-gap formation in magnetic susceptibility, magnetoresistance, and thermoelectric power. Furthermore, a magnetic anomaly observed in the magnetic susceptibility and resistivity at T ∼ 4 K was suppressed significantly by applying a magnetic field. A magnetically inhomogeneous phase arose below T ∼ 60 K, which appeared to consist of ferromagnetic and paramagnetic clusters.
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Affiliation(s)
- T Naka
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
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27
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Hiroki A, Yamashita S, Sato Y, Nagasawa N, Taguchi M. New polymer gel dosimeters consisting of less toxic monomers with radiation-crosslinked gel matrix. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/444/1/012028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Asakura H, Taguchi M, Ekawa T, Yamamoto S, Igimi S. Continued widespread dissemination and increased poultry host fitness of Campylobacter jejuni
ST-4526 and ST-4253 in Japan. J Appl Microbiol 2013; 114:1529-38. [DOI: 10.1111/jam.12147] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 01/16/2013] [Accepted: 01/17/2013] [Indexed: 12/12/2022]
Affiliation(s)
- H. Asakura
- Division of Biomedical Food Research; National Institute of Health Sciences; Tokyo Japan
| | - M. Taguchi
- Department of Bacteriology; Osaka Prefectural Institute of Public Health; Osaka Japan
| | - T. Ekawa
- Division of Biomedical Food Research; National Institute of Health Sciences; Tokyo Japan
| | - S. Yamamoto
- Division of Biomedical Food Research; National Institute of Health Sciences; Tokyo Japan
| | - S. Igimi
- Division of Biomedical Food Research; National Institute of Health Sciences; Tokyo Japan
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29
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Takigami M, Nagasawa N, Hiroki A, Taguchi M, Takigami S. Preparation of Stable CMC-ACID Gel. Gums and Stabilisers for the Food Industry 16 2012. [DOI: 10.1039/9781849734554-00175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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30
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Suzuki S, Tsutsumi M, Palo SE, Ebihara Y, Taguchi M, Ejiri M. Short-period gravity waves and ripples in the South Pole mesosphere. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011jd015882] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Rueff JP, Raymond S, Taguchi M, Sikora M, Itié JP, Baudelet F, Braithwaite D, Knebel G, Jaccard D. Pressure-induced valence crossover in superconducting CeCu2Si2. Phys Rev Lett 2011; 106:186405. [PMID: 21635111 DOI: 10.1103/physrevlett.106.186405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Indexed: 05/30/2023]
Abstract
Measurement of the Ce valence in the heavy fermion CeCu(2)Si(2) is reported for the first time under pressure and at low temperature (T=14 K) in proximity of the superconducting region. CeCu(2)Si(2) is considered as a strong candidate for a new type of pairing mechanism related to critical valence fluctuations which could set in at high pressure in the vicinity of the second superconducting dome. A quantitative estimate of the valence in this pressure region was achieved from the measurements of the Ce L(3) edge in the high-resolution partial-fluorescence yield mode and subsequent analysis of the spectra within the Anderson impurity model. While a clear increase of the Ce valence is found, the weak electron transfer and the continuous valence change under pressure suggests a crossover regime with the hypothetical valence line terminating at a critical end point T(cr) close to zero.
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Affiliation(s)
- J-P Rueff
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, Gif-sur-Yvette, France
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Abstract
AbstractThe electrical conductivity of nc-Si films grown from SiF4 and H2 with constant arsenic doping rises from 10-5 to 10 Scm-1 as the thickness rises from ˜ 0.1 to 1 μm. This variation demonstrates the strong influence of film structure on conductivity. We show that the conductivity of undoped nc-Si films of constant thickness can be varied by adding SiH4 to the SiF4 and H2 source gas.
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33
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Ohtsuki T, Chainani A, Eguchi R, Matsunami M, Takata Y, Taguchi M, Nishino Y, Tamasaku K, Yabashi M, Ishikawa T, Oura M, Senba Y, Ohashi H, Shin S. Role of Ti 3d carriers in mediating the ferromagnetism of Co∶TiO2 anatase thin films. Phys Rev Lett 2011; 106:047602. [PMID: 21405362 DOI: 10.1103/physrevlett.106.047602] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 12/28/2010] [Indexed: 05/30/2023]
Abstract
We study the surface and bulk electronic structure of the room-temperature ferromagnet Co∶TiO(2) anatase films using soft- and hard-x-ray photoemission spectroscopy with probe sensitivities of ∼1 and ∼10 nm, respectively. We obtain direct evidence of metallic Ti(3+) states in the bulk, which get suppressed to give a surface semiconductor, thus indicating the difference in electronic structure between surface and bulk. X-ray absorption and resonant photoemission spectroscopy reveal Ti(3+) electrons at the Fermi level (E(F)) and high-spin Co(2+) electrons occurring away from E(F). The results show the importance of the charge neutrality condition: Co(2+)+V(O)(2-)+2Ti(4+)↔Co(2+)+2Ti(3+) (V(O) is oxygen vacancy), which gives rise to the elusive Ti 3d carriers mediating ferromagnetism via the Co 3d-O 2p-Ti 3d exchange interaction pathway of the occupied orbitals.
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Affiliation(s)
- T Ohtsuki
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
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Taguchi M, Namikawa K, Maruo T, Lynch J, Sahara H. Antibodies to parvovirus, distemper virus and adenovirus conferred to household dogs using commercial combination vaccines containing Leptospira
bacterin. Vet Rec 2010; 167:931-4. [DOI: 10.1136/vr.c6225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- M Taguchi
- Taguchi Animal Hospital, Kamisatochou, Kodamagun, Japan
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35
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Kawatsu K, Taguchi M, Yonekita T, Matsumoto T, Morimatsu F, Kumeda Y. Simple and rapid detection of Campylobacter spp. in naturally contaminated chicken-meat samples by combination of a two-step enrichment method with an immunochromatographic assay. Int J Food Microbiol 2010; 142:256-9. [PMID: 20621373 DOI: 10.1016/j.ijfoodmicro.2010.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2010] [Revised: 05/14/2010] [Accepted: 06/15/2010] [Indexed: 11/27/2022]
Abstract
A simple and rapid method to detect Campylobacter spp. in chicken-meat samples was established. This method consisted of a combination of a two-step enrichment method with a commercially available immunochromatographic assay, named NH Immunochromato Campylobacter (NH IC Campy, Nippon Meat Packers, Ibaraki, Japan), which is able to detect Campylobacter antigen in an enrichment culture within 15 min. The enrichment method did not require much blood or a particular system of generating a microaerobic atmosphere, in contrast to the standard method of enriching Campylobacter spp. in chicken-meat samples. The sensitivity of a combination of the two-step enrichment method with NH IC Campy for detection of non- and freeze-stressed Campylobacter spp. in spiked chicken meat was determined using bacterial cells of Campylobacter jejuni and Campylobacter coli. The detection sensitivities for non-stressed C. jejuni and C. coli were found to range from 5.5 to 1.3x10(1) CFU per 25 g of chicken meat, and those for freeze-stressed C. jejuni and C. coli were found to range from 9.2x10(1) to 1.5x10(2) CFU per 25 g of chicken meat. When a total of 68 chicken-meat samples were tested, the combination method determined that 61 samples were positive for Campylobacter spp. This method was more sensitive than a bacterial culture test, which consists of standard enrichment culturing and plating onto selective agars. Because the combination could be conducted in approximately 48 h, from the beginning of the enrichment culture to final determination, it was more rapid than the bacterial culture test, which requires four to five days. Moreover, the combination was simple to perform. These results suggest that combining the two-step enrichment method with NH IC Campy is useful as a simple and rapid alternative to the conventional bacterial culture test for detecting Campylobacter spp. in naturally contaminated chicken meat samples.
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Affiliation(s)
- K Kawatsu
- Division of Bacteriology, Osaka Prefectural Institute of Public Health, Higashinari-ku, Osaka, Japan.
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Okawa M, Matsunami M, Ishizaka K, Eguchi R, Taguchi M, Chainani A, Takata Y, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Kuga K, Horie N, Nakatsuji S, Shin S. Strong valence fluctuation in the quantum critical heavy fermion superconductor β-YbAlB4: a hard x-ray photoemission study. Phys Rev Lett 2010; 104:247201. [PMID: 20867330 DOI: 10.1103/physrevlett.104.247201] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Indexed: 05/29/2023]
Abstract
Electronic structures of the quantum critical superconductor β-YbAlB4 and its polymorph α-YbAlB4 are investigated by using bulk-sensitive hard x-ray photoemission spectroscopy. From the Yb 3d core level spectra, the values of the Yb valence are estimated to be ∼2.73 and ∼2.75 for α- and β-YbAlB4, respectively, thus providing clear evidence for valence fluctuations. The valence band spectra of these compounds also show Yb2+ peaks at the Fermi level. These observations establish an unambiguous case of a strong mixed valence at quantum criticality for the first time among heavy fermion systems, calling for a novel scheme for a quantum critical model beyond the conventional Doniach picture in β-YbAlB4.
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Affiliation(s)
- M Okawa
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
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37
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Bhobe PA, Chainani A, Taguchi M, Takeuchi T, Eguchi R, Matsunami M, Ishizaka K, Takata Y, Oura M, Senba Y, Ohashi H, Nishino Y, Yabashi M, Tamasaku K, Ishikawa T, Takenaka K, Takagi H, Shin S. Evidence for a correlated insulator to antiferromagnetic metal transition in CrN. Phys Rev Lett 2010; 104:236404. [PMID: 20867257 DOI: 10.1103/physrevlett.104.236404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Indexed: 05/29/2023]
Abstract
We investigate the electronic structure of chromium nitride (CrN) across the first-order magnetostructural transition at T(N)∼286 K. Resonant photoemission spectroscopy (PES) shows a gap in the 3d partial density of states at the Fermi level and an on-site Coulomb energy U∼4.5 eV, indicating strong electron-electron correlations. Bulk-sensitive high-resolution (6 meV) laser PES reveals a clear Fermi edge indicating an antiferromagnetic metal below T(N). Hard x-ray Cr 2p core-level PES shows T-dependent changes across T(N) which originate from screening due to coherent states as substantiated by cluster model calculations using the experimentally observed U. Electrical resistivity confirms an insulator above T(N) (E(g)∼70 meV) becoming a disordered metal below T(N). Thus, CrN transforms from a correlated insulator to an antiferromagnetic metal, coupled to the magnetostructural transition.
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Affiliation(s)
- P A Bhobe
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
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38
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Taguchi M, Chainani A, Matsunami M, Eguchi R, Takata Y, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Tsuda S, Watanabe S, Chen CT, Senba Y, Ohashi H, Fujiwara K, Nakamura Y, Takagi H, Shin S. Anomalous state sandwiched between Fermi liquid and charge ordered Mott-insulating phases of Ti4O7. Phys Rev Lett 2010; 104:106401. [PMID: 20366439 DOI: 10.1103/physrevlett.104.106401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Indexed: 05/29/2023]
Abstract
The Magnéli phase Ti(4)O(7) exhibits two sharp jumps in resistivity with coupled structural transitions as a function of temperature at T(c1) approximately 142 K and T(c2) = 154 K. We have studied electronic structure changes across the two transitions using 7 eV laser, soft x-ray, and hard x-ray (HX) photoemission spectroscopy (PES). Ti 2p-3d resonant PES and HX PES show a clear metallic Fermi edge and mixed valency above T(c2). The low temperature phase below T(c1) shows a clear insulating gap of approximately 100 meV. The intermediate phase between T(c1) and T(c2) indicates a pseudogap coexisting with remnant coherent states. HX PES and complementary calculations have confirmed the coherent screening in the strongly correlated intermediate phase. The results suggest the existence of a highly anomalous state sandwiched between the mixed-valent Fermi liquid and charge ordered Mott-insulating phase in Ti(4)O(7).
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Affiliation(s)
- M Taguchi
- Soft X-ray Spectroscopy Lab, RIKEN SPring-8 Center, Sayo, Sayo, Hyogo 679-5148, Japan
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39
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Rayjada PA, Chainani A, Matsunami M, Taguchi M, Tsuda S, Yokoya T, Shin S, Sugawara H, Sato H. Kondo scaling of the pseudogap in CeOs4Sb12 and CeFe4P12. J Phys Condens Matter 2010; 22:095502. [PMID: 21389417 DOI: 10.1088/0953-8984/22/9/095502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
CeOs(4)Sb(12) and CeFe(4)P(12) are classified as Kondo semiconductors, which show coupled changes in electrical transport, thermodynamic and magnetic properties with a low-temperature semiconductor-like electrical resistivity. We have carried out core level and valence band photoemission spectroscopy on single crystal CeOs(4)Sb(12) and CeFe(4)P(12) to study their electronic structure and the evolution of states at the Fermi level as a function of temperature (∼10-300 K). The Ce 3d core level spectra show the presence of f(0), f(1) and f(2) final states with very different relative intensities in the two compounds. Single-impurity Anderson model calculations provide f electron counts of n(f) = 0.97 and 0.86 per Ce atom, suggestive of a low- and high-T(K) (= single ion Kondo temperature) for CeOs(4)Sb(12) and CeFe(4)P(12), respectively. The high-resolution temperature-dependent near-Fermi level spectra show pseudogaps of energy ∼ 50 meV and ∼ 110 meV in the valence band density of states (DOS) of CeOs(4)Sb(12) and CeFe(4)P(12), respectively. The temperature dependence of the DOS at the Fermi level follows the change in effective magnetic moment estimated from magnetic susceptibility for both materials, confirming the Kondo nature of the pseudogap in CeOs(4)Sb(12) and CeFe(4)P(12). A compilation of measured pseudogaps using photoemission and optical spectroscopy identifies the charge gaps Δ(C) for Ce-based Kondo semiconductors and provides a direct relation with T(K) given by Δ(C) ∼ 2k(B)T(K). In conjunction with the known behaviour of the spin gaps Δ(S) ∼ k(B)T(K), the results establish the coupled energy scaling of the spin and charge gaps in Kondo semiconductors.
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Affiliation(s)
- P A Rayjada
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
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Ishigami M, Taguchi M, Nishida M, Moriyama T, Yamashita S, Yamamura T. Abstract: P926 CLINICAL SIGNIFICANCE OF REMNANT LIPOPROTEIN CHOLESTEROL DETERMINATION IN METABOLIC SYNDROMESTUDIES WITH A NEWLY DEVELOPED HOMOGENOUS ASSAY-. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71047-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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41
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Matsunami M, Eguchi R, Kiss T, Horiba K, Chainani A, Taguchi M, Yamamoto K, Togashi T, Watanabe S, Wang XY, Chen CT, Senba Y, Ohashi H, Sugawara H, Sato H, Harima H, Shin S. Anomalous duality of 4f electrons in filled skutterudite CeOs4Sb12. Phys Rev Lett 2009; 102:036403. [PMID: 19257374 DOI: 10.1103/physrevlett.102.036403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Indexed: 05/27/2023]
Abstract
We study the electronic structure of the filled skutterudite CeOs4Sb12 using photoemission spectroscopy (PES). Soft x-ray excited Ce 3d-4f resonant PES confirms the existence of Ce 4f states at the Fermi level (EF). Temperature dependent high-resolution laser-PES spectra reveal a pseudogap formation around EF, which can be explained in terms of the hybridization gap. Simultaneously, a sharp feature is formed just above EF with decreasing temperature. The heavy-fermion-like specific heat is attributed to the occupation of this feature. The results identify the origin of the anomalous coexistence of heavy-fermion and pseudogap behavior in terms of a symmetry dependent hybridization.
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Affiliation(s)
- M Matsunami
- RIKEN SPring-8 Center, Sayo-gun, Hyogo 679-5148, Japan.
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42
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Jarrige I, Rueff JP, Shieh SR, Taguchi M, Ohishi Y, Matsumura T, Wang CP, Ishii H, Hiraoka N, Cai YQ. Pressure-induced valence anomaly in TmTe probed by resonant inelastic X-ray scattering. Phys Rev Lett 2008; 101:127401. [PMID: 18851408 DOI: 10.1103/physrevlett.101.127401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Revised: 12/09/2007] [Indexed: 05/26/2023]
Abstract
The pressure-induced valence transition in TmTe was investigated by resonant inelastic x-ray scattering at the Tm L3 edge, a powerful probe of the rare-earth valent state. The data are analyzed within the Anderson impurity model which yields key parameters such as the Tm 4f-5d hybridization. In addition to the general tendency of the f electrons towards delocalization, we find a plateau in both the Tm valence and hybridization pressure dependences between 4.3 and 6.5 GPa which is interpreted in terms of an n-channel Kondo (NCK) screening process. This behavior is at odds with the usually continuous, single-channel Kondo-like f delocalization while being supported by the seminal calculations of the NCK temperature in Tm ion by Saso et al. Our study raises the interesting possibility that an NCK effect realized in a compressed mixed-valent f system could impede the concomitant electron delocalization.
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Affiliation(s)
- I Jarrige
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan.
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43
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Kato M, Taguchi M, Kuramochi A, Suzuki T, Tsuchida T. A Case of Malignant Melanoma with Multiple Primary Lesions. J Cutan Pathol 2008. [DOI: 10.1111/j.0303-6987.2005.320dk.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Taguchi M, Matsunami M, Ishida Y, Eguchi R, Chainani A, Takata Y, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Senba Y, Ohashi H, Shin S. Revisiting the valence-band and core-level photoemission spectra of NiO. Phys Rev Lett 2008; 100:206401. [PMID: 18518558 DOI: 10.1103/physrevlett.100.206401] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Indexed: 05/26/2023]
Abstract
We have reexamined the valence-band (VB) and core-level electronic structure of NiO by means of hard and soft x-ray photoemission spectroscopies. The spectral weight of the lowest energy state was found to be enhanced in the bulk sensitive Ni 2p core-level spectrum. A configuration-interaction model including a bound state screening has shown agreement with the core-level spectrum and off- and on-resonance VB spectra. These results identify the lowest energy states in the core-level and VB spectra as the Zhang-Rice (ZR) doublet bound states, consistent with the spin-fermion model and recent ab initio calculations within dynamical mean-field theory. The results indicate that the ZR character first ionization (the lowest hole-addition) states are responsible for transport properties in NiO and doped NiO.
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Affiliation(s)
- M Taguchi
- Soft X-ray Spectroscopy Lab, RIKEN SPring-8 Center, Sayo, Sayo, Hyogo 679-5148, Japan
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Ebisuzaki T, Uehara Y, Ohmori H, Kawai K, Kawasaki Y, Sato M, Takizawa Y, Bertaina M, Kajino F, Sawabe T, Inoue K, Sasaki A, Sakata M, Yamamoto Y, Nagano M, Inoue N, Shibata T, Sakaki N, Uchihori Y, Takahashi Y, Shimizu H, Arai Y, Kurihara Y, Fujimoto H, Yoshida S, Mizumoto Y, Inoue S, Asano K, Sugiyama T, Watanabe J, Ikeda H, Suzuki M, Imamura T, Yano H, Murakami T, Yonetoku D, Itow Y, Taguchi M, Nagata M, Nagataki S, Abe S, Tajima T, Adams J, Mitchell S, Christl M, Watts J, English A, Takahashi Y, Pitalo K, Hadaway J, Geary J, Readon P, Crawford H, Pennypacker C, Arisaka K, Cline D, Gorodetsky P, Salin P, Patzark T, Maurissen A, Valentin M. The JEM-EUSO Project: Observing Extremely High Energy Cosmic Rays and Neutrinos from the International Space Station. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.nuclphysbps.2007.11.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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47
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Taguchi M, Konishi H, Shinohara T, Aizawa K, Takahashi H, Tateishi A, Sakano Y, Kaminishi Y, Ohki S, Saito T, Kawada M, Misawa Y. [Ascending aortic aneurysm following aortic valve replacement due to aortitis syndrome; report of a case]. Kyobu Geka 2006; 59:1103-5. [PMID: 17094550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A 60-year-old woman had previously undergone aortic valve replacement for aortic regurgitation. As the aortic wall was elastic hard, inflammatory change was suspected; therefore, we undertook a partial biopsy of the ascending aortic wall and the intraoperative pathological specimens were compatible with aortitis syndrome. As there was no active inflammatory change, she was diagnosed as inactive aortitis syndrome and steroid therapy was not applied. Seven years later, a follow-up computed tomography (CT) showed an ascending aortic aneurysm of 65 mm in diameter. Aortic root replacement was planned based on a clinical diagnosis of an aneurysm of the ascending aorta. The patient was discharged without complication 21 days after surgery. It is possible that an inactive stage of aortitis may lead to late dilatation of the ascending aorta; therefore, careful postoperative follow-up is necessary in such cases.
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Affiliation(s)
- M Taguchi
- Division of Cardiovascular Surgery, Jichi Medical School, Shimotsuke, Japan
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48
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Rueff JP, Itié JP, Taguchi M, Hague CF, Mariot JM, Delaunay R, Kappler JP, Jaouen N. Probing the transition in bulk Ce under pressure: a direct investigation by resonant inelastic X-ray scattering. Phys Rev Lett 2006; 96:237403. [PMID: 16803402 DOI: 10.1103/physrevlett.96.237403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2005] [Indexed: 05/10/2023]
Abstract
We report on the most complete investigation to date of the -electron properties at the transition in elemental Ce by resonant inelastic x-ray scattering (RIXS). The Ce 2p3d-RIXS spectra were measured directly in the bulk material as a function of pressure through the transition. The spectra were simulated within the Anderson impurity model. The occupation number n(f) and f double occupancy were derived from the calculations in both gamma and alpha phases in the ground state. We find that the electronic structure changes result mainly from band formation of 4f electrons which concurs with reduced electron correlation and increased Kondo screening at high pressure.
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Affiliation(s)
- J-P Rueff
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
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Kura F, Amemura-Maekawa J, Yagita K, Endo T, Ikeno M, Tsuji H, Taguchi M, Kobayashi K, Ishii E, Watanabe H. Outbreak of Legionnaires' disease on a cruise ship linked to spa-bath filter stones contaminated with Legionella pneumophila serogroup 5. Epidemiol Infect 2006; 134:385-91. [PMID: 16490144 PMCID: PMC2870400 DOI: 10.1017/s095026880500508x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2005] [Indexed: 11/07/2022] Open
Abstract
In January 2003, two cases of Legionnaires' disease associated with a ship's cruise were registered in the database of National Epidemiological Surveillance of Infectious Diseases. A 70-year-old male heavy smoker with mild emphysema contracted the disease during a cruise. Legionella pneumophila serogroup (sg) 5 was isolated from the patient's sputum and the ship's indoor spa. The isolate from the spa matched the patient's isolate by genotyping performed by pulsed-field gel electrophoresis (PFGE). The second case was in a 73-year-old female. During epidemiological investigation, a third case of Legionnaire's disease in a 71-year-old male was subsequently diagnosed among passengers on the same ship on the following cruise. Environmental investigation revealed that porous natural stones (Maifanshi) in the filters of the spas had harboured L. pneumophila, a phenomenon which has not been reported except in Japan. This is the first documented evidence of L. pneumophila sg 5 infection on a ship and of porous stones as a source of Legionella infection.
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Affiliation(s)
- F Kura
- Department of Bacteriology, National Institute of Infectious Diseases, Tokyo, Japan.
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50
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Asaumi H, Watanabe S, Taguchi M, Tashiro M, Nagashio Y, Nomiyama Y, Nakamura H, Otsuki M. Green tea polyphenol (-)-epigallocatechin-3-gallate inhibits ethanol-induced activation of pancreatic stellate cells. Eur J Clin Invest 2006; 36:113-22. [PMID: 16436093 DOI: 10.1111/j.1365-2362.2006.01599.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Activated pancreatic stellate cells (PSCs) play a central role in the pathogenesis of pancreatic fibrogenesis and inflammation. Ethanol, a major cause of chronic pancreatitis, directly induces PSC activation and oxidative stress. Inhibition of PSC activation or stimulation to PSC might be an effective therapeutic strategy for the prevention of pancreatic fibrosis, and (-)-epigallocatechin-3-gallate (EGCG), a major component of green tea extracts, is a potent antioxidant of polyphenols. Therefore, we examined the mechanisms through which ethanol induces oxidative stress on PSCs and evaluated the effect of EGCG on activation and cell functions of ethanol-stimulated PSCs. MATERIALS AND METHODS The PSCs were isolated from the pancreas of male Wister rats with Nycodenz gradient methods and cells between passages one and four were used. Isolated PSCs were cultured with ethanol (50 mM) in the absence or presence of EGCG (5 microM or 25 microM). RESULTS The EGCG pre-treatment abolished ethanol-induced lipid peroxidation of the cell membrane, loss of total superoxide dismutase (SOD) activity and suppressed ethanol-induced gene expressions of Mn- and Cu/Zn-SOD. EGCG also suppressed ethanol-induced p38 mitogen-activated protein (MAP) kinase phosphorylation, alpha-smooth muscle actin production in PSCs and activated transforming growth factor-beta1 secretion into the medium. Furthermore, EGCG inhibited ethanol-induced type-I procollagen production and collagen secretion. In addition, EGCG inhibited transformation of freshly isolated cells to activated myofibroblast-like phenotype. CONCLUSIONS Our results suggest that green tea and polyphenols could prevent pancreatic fibrosis by inhibiting PSC activation through the antioxidative effect.
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Affiliation(s)
- H Asaumi
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Kitakyushu, Japan
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