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Albanese R, Alexandrov A, Alicante F, Anokhina A, Asada T, Battilana C, Bay A, Betancourt C, Biswas R, Blanco Castro A, Bogomilov M, Bonacorsi D, Bonivento WM, Bordalo P, Boyarsky A, Buontempo S, Campanelli M, Camporesi T, Canale V, Castro A, Centanni D, Cerutti F, Chernyavskiy M, Choi KY, Cholak S, Cindolo F, Climescu M, Conaboy AP, Dallavalle GM, Davino D, de Bryas PT, De Lellis G, De Magistris M, De Roeck A, De Rújula A, De Serio M, De Simone D, Di Crescenzo A, Donà R, Durhan O, Fabbri F, Fedotovs F, Ferrillo M, Ferro-Luzzi M, Fini RA, Fiorillo A, Fresa R, Funk W, Garay Walls FM, Golovatiuk A, Golutvin A, Graverini E, Guler AM, Guliaeva V, Haefeli GJ, Helo Herrera JC, van Herwijnen E, Iengo P, Ilieva S, Infantino A, Iuliano A, Jacobsson R, Kamiscioglu C, Kauniskangas AM, Khalikov E, Kim SH, Kim YG, Klioutchnikov G, Komatsu M, Konovalova N, Kovalenko S, Kuleshov S, Lacker HM, Lantwin O, Lasagni Manghi F, Lauria A, Lee KY, Lee KS, Lo Meo S, Loschiavo VP, Marcellini S, Margiotta A, Mascellani A, Miano A, Mikulenko A, Montesi MC, Navarria FL, Ogawa S, Okateva N, Ovchynnikov M, Paggi G, Park BD, Pastore A, Perrotta A, Podgrudkov D, Polukhina N, Prota A, Quercia A, Ramos S, Reghunath A, Roganova T, Ronchetti F, Rovelli T, Ruchayskiy O, Ruf T, Sabate Gilarte M, Samoilov M, Scalera V, Schneider O, Sekhniaidze G, Serra N, Shaposhnikov M, Shevchenko V, Shchedrina T, Shchutska L, Shibuya H, Simone S, Siroli GP, Sirri G, Soares G, Soto Sandoval OJ, Spurio M, Starkov N, Timiryasov I, Tioukov V, Tramontano F, Trippl C, Ursov E, Ustyuzhanin A, Vankova-Kirilova G, Verguilov V, Viegas Guerreiro Leonardo N, Vilela C, Visone C, Wanke R, Yaman E, Yazici C, Yoon CS, Zaffaroni E, Zamora Saa J. Observation of Collider Muon Neutrinos with the SND@LHC Experiment. Phys Rev Lett 2023; 131:031802. [PMID: 37540851 DOI: 10.1103/physrevlett.131.031802] [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: 05/17/2023] [Revised: 06/13/2023] [Accepted: 06/20/2023] [Indexed: 08/06/2023]
Abstract
We report the direct observation of muon neutrino interactions with the SND@LHC detector at the Large Hadron Collider. A dataset of proton-proton collisions at sqrt[s]=13.6 TeV collected by SND@LHC in 2022 is used, corresponding to an integrated luminosity of 36.8 fb^{-1}. The search is based on information from the active electronic components of the SND@LHC detector, which covers the pseudorapidity region of 7.2<η<8.4, inaccessible to the other experiments at the collider. Muon neutrino candidates are identified through their charged-current interaction topology, with a track propagating through the entire length of the muon detector. After selection cuts, 8 ν_{μ} interaction candidate events remain with an estimated background of 0.086 events, yielding a significance of about 7 standard deviations for the observed ν_{μ} signal.
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Affiliation(s)
- R Albanese
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | | | - F Alicante
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - A Anokhina
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - T Asada
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - C Battilana
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - A Bay
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - C Betancourt
- Physik-Institut, Universität Zürich, 8057 Zürich, Switzerland
| | - R Biswas
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - A Blanco Castro
- Laboratory of Instrumentation and Experimental Particle Physics (LIP), 1649-003 Lisbon, Portugal
| | - M Bogomilov
- Faculty of Physics, Sofia University, 1164 Sofia, Bulgaria
| | - D Bonacorsi
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - W M Bonivento
- Università degli Studi di Cagliari, 09124 Cagliari, Italy
| | - P Bordalo
- Laboratory of Instrumentation and Experimental Particle Physics (LIP), 1649-003 Lisbon, Portugal
| | - A Boyarsky
- University of Leiden, 2300 RA Leiden, The Netherlands
- Taras Shevchenko National University of Kyiv, 01033 Kyiv, Ukraine
| | | | - M Campanelli
- University College London, WC1E 6BT London, United Kingdom
| | - T Camporesi
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - V Canale
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - A Castro
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - D Centanni
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli Parthenope, 80143 Napoli, Italy
| | - F Cerutti
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - M Chernyavskiy
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - K-Y Choi
- Sungkyunkwan University, 16419 Suwon-si, Gyeong Gi-do, Korea
| | - S Cholak
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - F Cindolo
- Sezione INFN di Bologna, Bologna, Italy
| | - M Climescu
- Institut für Physik and PRISMA Cluster of Excellence, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany
| | - A P Conaboy
- Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | | | - D Davino
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università del Sannio, 82100 Benevento, Italy
| | - P T de Bryas
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - G De Lellis
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - M De Magistris
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli Parthenope, 80143 Napoli, Italy
| | - A De Roeck
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - A De Rújula
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - M De Serio
- Sezione INFN di Bari, 70126 Bari, Italy
- Università di Bari, 70126 Bari, Italy
| | - D De Simone
- Physik-Institut, Universität Zürich, 8057 Zürich, Switzerland
| | - A Di Crescenzo
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - R Donà
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - O Durhan
- Middle East Technical University (METU), 06800 Ankara, Turkey
| | - F Fabbri
- Sezione INFN di Bologna, Bologna, Italy
| | - F Fedotovs
- University College London, WC1E 6BT London, United Kingdom
| | - M Ferrillo
- Physik-Institut, Universität Zürich, 8057 Zürich, Switzerland
| | - M Ferro-Luzzi
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - R A Fini
- Sezione INFN di Bari, 70126 Bari, Italy
| | - A Fiorillo
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - R Fresa
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università della Basilicata, 85100 Potenza, Italy
| | - W Funk
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - F M Garay Walls
- Departamento de Física, Pontificia Universidad Católica de Chile, 4860 Santiago, Chile
| | - A Golovatiuk
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - A Golutvin
- Imperial College London, SW7 2AZ London, United Kingdom
| | - E Graverini
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - A M Guler
- Middle East Technical University (METU), 06800 Ankara, Turkey
| | - V Guliaeva
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - G J Haefeli
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - J C Helo Herrera
- Millennium Institute for Subatomic physics at high energy frontier-SAPHIR, Fernandez Concha 700, 7591538 Santiago, Chile
- Departamento de Física, Facultad de Ciencias, Universidad de La Serena, Avenida Cisternas 1200, La Serena, Chile
| | | | - P Iengo
- Sezione INFN di Napoli, 80126 Napoli, Italy
| | - S Ilieva
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
- Faculty of Physics, Sofia University, 1164 Sofia, Bulgaria
| | - A Infantino
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - A Iuliano
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - R Jacobsson
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - C Kamiscioglu
- Middle East Technical University (METU), 06800 Ankara, Turkey
- Ankara University, 06100 Ankara, Turkey
| | - A M Kauniskangas
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - E Khalikov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - S H Kim
- Department of Physics Education and RINS, Gyeongsang National University, 52828 Jinju, Korea
| | - Y G Kim
- Gwangju National University of Education, 61204 Gwangju, Korea
| | - G Klioutchnikov
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - M Komatsu
- Nagoya University, 464-8602 Nagoya, Japan
| | - N Konovalova
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - S Kovalenko
- Millennium Institute for Subatomic physics at high energy frontier-SAPHIR, Fernandez Concha 700, 7591538 Santiago, Chile
- Center for Theoretical and Experimental Particle Physics, Facultad de Ciencias Exactas, Universidad Andrés Bello, Fernandez Concha 700, Santiago, Chile
| | - S Kuleshov
- Millennium Institute for Subatomic physics at high energy frontier-SAPHIR, Fernandez Concha 700, 7591538 Santiago, Chile
- Center for Theoretical and Experimental Particle Physics, Facultad de Ciencias Exactas, Universidad Andrés Bello, Fernandez Concha 700, Santiago, Chile
| | - H M Lacker
- Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - O Lantwin
- Affiliated with an institute covered by a cooperation agreement with CERN
| | | | - A Lauria
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - K Y Lee
- Department of Physics Education and RINS, Gyeongsang National University, 52828 Jinju, Korea
| | - K S Lee
- Korea University, 02841 Seoul, Korea
| | - S Lo Meo
- Sezione INFN di Bologna, Bologna, Italy
| | - V P Loschiavo
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università del Sannio, 82100 Benevento, Italy
| | | | - A Margiotta
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - A Mascellani
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - A Miano
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - A Mikulenko
- University of Leiden, 2300 RA Leiden, The Netherlands
| | - M C Montesi
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - F L Navarria
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - S Ogawa
- Toho University, 274-8510 Funabashi, Chiba, Japan
| | - N Okateva
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - M Ovchynnikov
- University of Leiden, 2300 RA Leiden, The Netherlands
| | - G Paggi
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - B D Park
- Department of Physics Education and RINS, Gyeongsang National University, 52828 Jinju, Korea
| | - A Pastore
- Sezione INFN di Bari, 70126 Bari, Italy
| | | | - D Podgrudkov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - N Polukhina
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - A Prota
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - A Quercia
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - S Ramos
- Laboratory of Instrumentation and Experimental Particle Physics (LIP), 1649-003 Lisbon, Portugal
| | - A Reghunath
- Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - T Roganova
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - F Ronchetti
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - T Rovelli
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - O Ruchayskiy
- Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
| | - T Ruf
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - M Sabate Gilarte
- European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland
| | - M Samoilov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - V Scalera
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli Parthenope, 80143 Napoli, Italy
| | - O Schneider
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | | | - N Serra
- Physik-Institut, Universität Zürich, 8057 Zürich, Switzerland
| | - M Shaposhnikov
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - V Shevchenko
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - T Shchedrina
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - L Shchutska
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - H Shibuya
- Toho University, 274-8510 Funabashi, Chiba, Japan
- Constructor University, Campus Ring 1, Bremen 28759, Germany
| | - S Simone
- Sezione INFN di Bari, 70126 Bari, Italy
- Università di Bari, 70126 Bari, Italy
| | - G P Siroli
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - G Sirri
- Sezione INFN di Bologna, Bologna, Italy
| | - G Soares
- Laboratory of Instrumentation and Experimental Particle Physics (LIP), 1649-003 Lisbon, Portugal
| | - O J Soto Sandoval
- Millennium Institute for Subatomic physics at high energy frontier-SAPHIR, Fernandez Concha 700, 7591538 Santiago, Chile
- Departamento de Física, Facultad de Ciencias, Universidad de La Serena, Avenida Cisternas 1200, La Serena, Chile
| | - M Spurio
- Sezione INFN di Bologna, Bologna, Italy
- Università di Bologna, Bologna, Italy
| | - N Starkov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - I Timiryasov
- Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
| | - V Tioukov
- Sezione INFN di Napoli, 80126 Napoli, Italy
| | | | - C Trippl
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - E Ursov
- Affiliated with an institute covered by a cooperation agreement with CERN
| | - A Ustyuzhanin
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Constructor University, Campus Ring 1, Bremen 28759, Germany
| | | | - V Verguilov
- Faculty of Physics, Sofia University, 1164 Sofia, Bulgaria
| | | | - C Vilela
- Laboratory of Instrumentation and Experimental Particle Physics (LIP), 1649-003 Lisbon, Portugal
| | - C Visone
- Sezione INFN di Napoli, 80126 Napoli, Italy
- Università di Napoli "Federico II", 80126 Napoli, Italy
| | - R Wanke
- Institut für Physik and PRISMA Cluster of Excellence, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany
| | - E Yaman
- Middle East Technical University (METU), 06800 Ankara, Turkey
| | - C Yazici
- Middle East Technical University (METU), 06800 Ankara, Turkey
| | - C S Yoon
- Department of Physics Education and RINS, Gyeongsang National University, 52828 Jinju, Korea
| | - E Zaffaroni
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - J Zamora Saa
- Millennium Institute for Subatomic physics at high energy frontier-SAPHIR, Fernandez Concha 700, 7591538 Santiago, Chile
- Center for Theoretical and Experimental Particle Physics, Facultad de Ciencias Exactas, Universidad Andrés Bello, Fernandez Concha 700, Santiago, Chile
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Agafonova N, Alexandrov A, Anokhina A, Aoki S, Ariga A, Ariga T, Bertolin A, Bozza C, Brugnera R, Buonaura A, Buontempo S, Chernyavskiy M, Chukanov A, Consiglio L, D'Ambrosio N, De Lellis G, De Serio M, Del Amo Sanchez P, Di Crescenzo A, Di Ferdinando D, Di Marco N, Dmitrievsky S, Dracos M, Duchesneau D, Dusini S, Dzhatdoev T, Ebert J, Ereditato A, Fini RA, Fornari F, Fukuda T, Galati G, Garfagnini A, Gentile V, Goldberg J, Gorbunov S, Gornushkin Y, Grella G, Guler AM, Gustavino C, Hagner C, Hara T, Hayakawa T, Hollnagel A, Ishiguro K, Iuliano A, Jakovčić K, Jollet C, Kamiscioglu C, Kamiscioglu M, Kim SH, Kitagawa N, Kliček B, Kodama K, Komatsu M, Kose U, Kreslo I, Laudisio F, Lauria A, Lavasa A, Longhin A, Loverre P, Malgin A, Mandrioli G, Matsuo T, Matveev V, Mauri N, Medinaceli E, Meregaglia A, Mikado S, Miyanishi M, Mizutani F, Monacelli P, Montesi MC, Morishima K, Muciaccia MT, Naganawa N, Naka T, Nakamura M, Nakano T, Niwa K, Ogawa S, Okateva N, Ozaki K, Paoloni A, Park BD, Pasqualini L, Pastore A, Patrizii L, Pessard H, Podgrudkov D, Polukhina N, Pozzato M, Pupilli F, Roda M, Roganova T, Rokujo H, Rosa G, Ryazhskaya O, Sato O, Shakirianova I, Schembri A, Shchedrina T, Shibayama E, Shibuya H, Shiraishi T, Šimko T, Simone S, Sirignano C, Sirri G, Sotnikov A, Spinetti M, Stanco L, Starkov N, Stellacci SM, Stipčević M, Strolin P, Takahashi S, Tenti M, Terranova F, Tioukov V, Tsanaktsidis I, Tufanli S, Ustyuzhanin A, Vasina S, Vidal García M, Vilain P, Voevodina E, Votano L, Vuilleumier JL, Wilquet G, Yoon CS. OPERA tau neutrino charged current interactions. Sci Data 2021; 8:218. [PMID: 34385471 PMCID: PMC8361145 DOI: 10.1038/s41597-021-00991-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/01/2021] [Indexed: 11/08/2022] Open
Abstract
The OPERA experiment was designed to discover the vτ appearance in a vμ beam, due to neutrino oscillations. The detector, located in the underground Gran Sasso Laboratory, consisted of a nuclear photographic emulsion/lead target with a mass of about 1.25 kt, complemented by electronic detectors. It was exposed from 2008 to 2012 to the CNGS beam: an almost pure vμ beam with a baseline of 730 km, collecting a total of 1.8·1020 protons on target. The OPERA Collaboration eventually assessed the discovery of vμ→vτ oscillations with a statistical significance of 6.1 σ by observing ten vτ CC interaction candidates. These events have been published on the Open Data Portal at CERN. This paper provides a detailed description of the vτ data sample to make it usable by the whole community.
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Affiliation(s)
- N Agafonova
- INR - Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
| | | | - A Anokhina
- SINP MSU - Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
| | - S Aoki
- Kobe University, Kobe, Japan
| | - A Ariga
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, Bern, Switzerland
| | - T Ariga
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, Bern, Switzerland
- Faculty of Arts and Science, Kyushu University, Fukuoka, Japan
| | | | - C Bozza
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, Fisciano (Salerno), Italy
| | - R Brugnera
- INFN Sezione di Padova, Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, Padova, Italy
| | - A Buonaura
- INFN Sezione di Napoli, Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy
- University of Liverpool, Liverpool, UK
| | | | - M Chernyavskiy
- LPI - Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
| | - A Chukanov
- JINR - Joint Institute for Nuclear Research, Dubna, Russia
| | | | - N D'Ambrosio
- INFN - Laboratori Nazionali del Gran Sasso, Assergi (L'Aquila), Italy
| | - G De Lellis
- INFN Sezione di Napoli, Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy
| | - M De Serio
- Dipartimento di Fisica dell'Università di Bari, Bari, Italy
- INFN Sezione di Bari, Bari, Italy
| | - P Del Amo Sanchez
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, Annecy-le-Vieux, France
| | - A Di Crescenzo
- INFN Sezione di Napoli, Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy
| | | | - N Di Marco
- INFN - Laboratori Nazionali del Gran Sasso, Assergi (L'Aquila), Italy
- GSSI - Gran Sasso Science Institute, L'Aquila, Italy
| | - S Dmitrievsky
- JINR - Joint Institute for Nuclear Research, Dubna, Russia.
| | - M Dracos
- IPHC, Université de Strasbourg, CNRS/IN2P3, Strasbourg, France
| | - D Duchesneau
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, Annecy-le-Vieux, France
| | - S Dusini
- INFN Sezione di Padova, Padova, Italy
| | - T Dzhatdoev
- SINP MSU - Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
| | - J Ebert
- Hamburg University, Hamburg, Germany
| | - A Ereditato
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, Bern, Switzerland
| | - R A Fini
- INFN Sezione di Bari, Bari, Italy
| | - F Fornari
- INFN Sezione di Bologna, Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, Bologna, Italy
| | - T Fukuda
- Nagoya University, Nagoya, Japan
| | - G Galati
- INFN Sezione di Napoli, Napoli, Italy.
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy.
| | - A Garfagnini
- INFN Sezione di Padova, Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, Padova, Italy
| | - V Gentile
- GSSI - Gran Sasso Science Institute, L'Aquila, Italy
| | - J Goldberg
- Department of Physics, Technion, Haifa, Israel
| | - S Gorbunov
- LPI - Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Y Gornushkin
- JINR - Joint Institute for Nuclear Research, Dubna, Russia
| | - G Grella
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, Fisciano (Salerno), Italy
| | - A M Guler
- METU - Middle East Technical University, Ankara, Turkey
| | | | - C Hagner
- Hamburg University, Hamburg, Germany
| | - T Hara
- Kobe University, Kobe, Japan
| | | | | | | | - A Iuliano
- INFN Sezione di Napoli, Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy
| | - K Jakovčić
- Ruder Bošković Institute, Zagreb, Croatia
| | - C Jollet
- IPHC, Université de Strasbourg, CNRS/IN2P3, Strasbourg, France
| | - C Kamiscioglu
- METU - Middle East Technical University, Ankara, Turkey
- Ankara University, Ankara, Turkey
| | - M Kamiscioglu
- METU - Middle East Technical University, Ankara, Turkey
| | - S H Kim
- Gyeongsang National University, 900 Gazwa-dong, Jinju, 660-701, Korea
| | | | - B Kliček
- Center of Excellence for Advanced Materials and Sensing Devices, Ruder Bošković Institute, Zagreb, Croatia
| | - K Kodama
- Aichi University of Education, Kariya, (Aichi-Ken), Japan
| | | | - U Kose
- INFN Sezione di Padova, Padova, Italy
| | - I Kreslo
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, Bern, Switzerland
| | - F Laudisio
- INFN Sezione di Padova, Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, Padova, Italy
| | - A Lauria
- INFN Sezione di Napoli, Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy
| | | | - A Longhin
- INFN Sezione di Padova, Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, Padova, Italy
| | | | - A Malgin
- INR - Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
| | | | - T Matsuo
- Toho University, Funabashi, Japan
| | - V Matveev
- INR - Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
| | - N Mauri
- INFN Sezione di Bologna, Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, Bologna, Italy
| | - E Medinaceli
- Istituto Nazionale di Astrofisica - Osservatorio di Astrofisica e Scienza dello Spazio Bologna, Bologna, Italy
| | - A Meregaglia
- IPHC, Université de Strasbourg, CNRS/IN2P3, Strasbourg, France
| | - S Mikado
- Nihon University, Narashino, Chiba, Japan
| | | | | | | | - M C Montesi
- INFN Sezione di Napoli, Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy
| | | | - M T Muciaccia
- Dipartimento di Fisica dell'Università di Bari, Bari, Italy
- INFN Sezione di Bari, Bari, Italy
| | | | - T Naka
- Nagoya University, Nagoya, Japan
| | | | - T Nakano
- Nagoya University, Nagoya, Japan
| | - K Niwa
- Nagoya University, Nagoya, Japan
| | - S Ogawa
- Toho University, Funabashi, Japan
| | - N Okateva
- LPI - Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
| | - K Ozaki
- Kobe University, Kobe, Japan
| | - A Paoloni
- INFN - Laboratori Nazionali di Frascati, Frascati (Roma), Italy
| | - B D Park
- Gyeongsang National University, 900 Gazwa-dong, Jinju, 660-701, Korea
| | - L Pasqualini
- INFN Sezione di Bologna, Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, Bologna, Italy
| | | | | | - H Pessard
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, Annecy-le-Vieux, France
| | - D Podgrudkov
- SINP MSU - Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
| | - N Polukhina
- LPI - Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
- MEPhI - Moscow Engineering Physics Institute, Moscow, Russia
| | - M Pozzato
- INFN Sezione di Bologna, Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, Bologna, Italy
| | - F Pupilli
- INFN Sezione di Padova, Padova, Italy
| | - M Roda
- INFN Sezione di Padova, Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, Padova, Italy
- Physik-Institut, Universitaet Zuerich, Zuerich, Switzerland
| | - T Roganova
- SINP MSU - Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
| | - H Rokujo
- Nagoya University, Nagoya, Japan
| | - G Rosa
- INFN Sezione di Roma, Roma, Italy
| | - O Ryazhskaya
- INR - Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
| | - O Sato
- Nagoya University, Nagoya, Japan
| | - I Shakirianova
- INR - Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
| | - A Schembri
- INFN - Laboratori Nazionali del Gran Sasso, Assergi (L'Aquila), Italy
| | - T Shchedrina
- LPI - Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
| | | | | | | | | | - S Simone
- Dipartimento di Fisica dell'Università di Bari, Bari, Italy
- INFN Sezione di Bari, Bari, Italy
| | - C Sirignano
- INFN Sezione di Padova, Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, Padova, Italy
| | - G Sirri
- INFN Sezione di Bologna, Bologna, Italy
| | - A Sotnikov
- JINR - Joint Institute for Nuclear Research, Dubna, Russia
| | - M Spinetti
- INFN - Laboratori Nazionali di Frascati, Frascati (Roma), Italy
| | - L Stanco
- INFN Sezione di Padova, Padova, Italy
| | - N Starkov
- LPI - Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
| | - S M Stellacci
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, Fisciano (Salerno), Italy
| | - M Stipčević
- Center of Excellence for Advanced Materials and Sensing Devices, Ruder Bošković Institute, Zagreb, Croatia
| | - P Strolin
- INFN Sezione di Napoli, Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, Napoli, Italy
| | | | - M Tenti
- INFN Sezione di Bologna, Bologna, Italy
| | - F Terranova
- Dipartimento di Fisica dell'Università di Milano-Bicocca, Milano, Italy
| | - V Tioukov
- INFN Sezione di Napoli, Napoli, Italy
| | | | - S Tufanli
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, Bern, Switzerland
- CERN, Geneva, Switzerland
| | - A Ustyuzhanin
- INFN Sezione di Napoli, Napoli, Italy
- HSE - National Research University Higher School of Economics, Moscow, Russia
| | - S Vasina
- JINR - Joint Institute for Nuclear Research, Dubna, Russia
| | | | - P Vilain
- IIHE, Université Libre de Bruxelles, Brussels, Belgium
| | | | - L Votano
- INFN - Laboratori Nazionali di Frascati, Frascati (Roma), Italy
| | - J L Vuilleumier
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, Bern, Switzerland
| | - G Wilquet
- IIHE, Université Libre de Bruxelles, Brussels, Belgium
| | - C S Yoon
- Gyeongsang National University, 900 Gazwa-dong, Jinju, 660-701, Korea
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3
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Hayakawa SH, Agari K, Ahn JK, Akaishi T, Akazawa Y, Ashikaga S, Bassalleck B, Bleser S, Ekawa H, Endo Y, Fujikawa Y, Fujioka N, Fujita M, Goto R, Han Y, Hasegawa S, Hashimoto T, Hayakawa T, Hayata E, Hicks K, Hirose E, Hirose M, Honda R, Hoshino K, Hoshino S, Hosomi K, Hwang SH, Ichikawa Y, Ichikawa M, Imai K, Inaba K, Ishikawa Y, Ito H, Ito K, Jung WS, Kanatsuki S, Kanauchi H, Kasagi A, Kawai T, Kim MH, Kim SH, Kinbara S, Kiuchi R, Kobayashi H, Kobayashi K, Koike T, Koshikawa A, Lee JY, Ma TL, Matsumoto SY, Minakawa M, Miwa K, Moe AT, Moon TJ, Moritsu M, Nagase Y, Nakada Y, Nakagawa M, Nakashima D, Nakazawa K, Nanamura T, Naruki M, Nyaw ANL, Ogura Y, Ohashi M, Oue K, Ozawa S, Pochodzalla J, Ryu SY, Sako H, Sato S, Sato Y, Schupp F, Shirotori K, Soe MM, Soe MK, Sohn JY, Sugimura H, Suzuki KN, Takahashi H, Takahashi T, Takeda T, Tamura H, Tanida K, Theint AMM, Tint KT, Toyama Y, Ukai M, Umezaki E, Watabe T, Watanabe K, Yamamoto TO, Yang SB, Yoon CS, Yoshida J, Yoshimoto M, Zhang DH, Zhang Z. Observation of Coulomb-Assisted Nuclear Bound State of Ξ^{-}-^{14}N System. Phys Rev Lett 2021; 126:062501. [PMID: 33635678 DOI: 10.1103/physrevlett.126.062501] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/19/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.
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Affiliation(s)
- S H Hayakawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - K Agari
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - J K Ahn
- Department of Physics, Korea University, Seoul 02841, Korea
| | - T Akaishi
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - Y Akazawa
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Ashikaga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - B Bassalleck
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA
| | - S Bleser
- Helmholtz Institute Mainz, 55099 Mainz, Germany
| | - H Ekawa
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - Y Endo
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Fujikawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - N Fujioka
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Fujita
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - R Goto
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Han
- Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - S Hasegawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - T Hashimoto
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - T Hayakawa
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - E Hayata
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - K Hicks
- Department of Physics & Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - E Hirose
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - M Hirose
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - R Honda
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - K Hoshino
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - S Hoshino
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - K Hosomi
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - S H Hwang
- Korea Research Institute of Standards and Science, Daejeon 34113, Korea
| | - Y Ichikawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - M Ichikawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
- Meson Science Laboratory, RIKEN, Wako 351-0198, Japan
| | - K Imai
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - K Inaba
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Y Ishikawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - H Ito
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Ito
- Department of Physics, Nagoya University, Nagoya 464-8601, Japan
| | - W S Jung
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S Kanatsuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Kanauchi
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Kasagi
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - T Kawai
- Center for Advanced Photonics, RIKEN, Wako 351-0198, Japan
| | - M H Kim
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S H Kim
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S Kinbara
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - R Kiuchi
- Institute of High Energy Physics, Beijing 100049, China
| | - H Kobayashi
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Kobayashi
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - T Koike
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Koshikawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - J Y Lee
- Department of Physics, Seoul National University, Seoul 08826, Korea
| | - T L Ma
- Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
| | - S Y Matsumoto
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
- Meson Science Laboratory, RIKEN, Wako 351-0198, Japan
| | - M Minakawa
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - K Miwa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A T Moe
- Department of Physics, Lashio University, Lashio 06301, Myanmar
| | - T J Moon
- Department of Physics, Seoul National University, Seoul 08826, Korea
| | - M Moritsu
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - Y Nagase
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Nakada
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - M Nakagawa
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
| | - D Nakashima
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Nakazawa
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - T Nanamura
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - M Naruki
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - A N L Nyaw
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - Y Ogura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Ohashi
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Oue
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - S Ozawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - J Pochodzalla
- Helmholtz Institute Mainz, 55099 Mainz, Germany
- Institut fur Kernphysik, Johannes Gutenberg-Universitat, 55099 Mainz, Germany
| | - S Y Ryu
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
| | - H Sako
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - S Sato
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - Y Sato
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - F Schupp
- Helmholtz Institute Mainz, 55099 Mainz, Germany
| | - K Shirotori
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
| | - M M Soe
- Department of Physics, University of Yangon, Yangon 11041, Myanmar
| | - M K Soe
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - J Y Sohn
- Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Korea
| | - H Sugimura
- Accelerator Laboratory, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - K N Suzuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Takahashi
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - T Takahashi
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - T Takeda
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Tamura
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Tanida
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - A M M Theint
- Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
| | - K T Tint
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - Y Toyama
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Ukai
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - E Umezaki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T Watabe
- Department of Physics, Nagoya University, Nagoya 464-8601, Japan
| | - K Watanabe
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T O Yamamoto
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - S B Yang
- Department of Physics, Korea University, Seoul 02841, Korea
| | - C S Yoon
- Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Korea
| | - J Yoshida
- High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Yoshimoto
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - D H Zhang
- Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
| | - Z Zhang
- Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
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4
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Agafonova N, Alexandrov A, Anokhina A, Aoki S, Ariga A, Ariga T, Bertolin A, Bozza C, Brugnera R, Buonaura A, Buontempo S, Chernyavskiy M, Chukanov A, Consiglio L, D'Ambrosio N, De Lellis G, De Serio M, Del Amo Sanchez P, Di Crescenzo A, Di Ferdinando D, Di Marco N, Dmitrievsky S, Dracos M, Duchesneau D, Dusini S, Dzhatdoev T, Ebert J, Ereditato A, Favier J, Fini RA, Fornari F, Fukuda T, Galati G, Garfagnini A, Gentile V, Goldberg J, Gorbunov S, Gornushkin Y, Grella G, Guler AM, Gustavino C, Hagner C, Hara T, Hayakawa T, Hollnagel A, Ishiguro K, Iuliano A, Jakovcic K, Jollet C, Kamiscioglu C, Kamiscioglu M, Kim SH, Kitagawa N, Klicek B, Kodama K, Komatsu M, Kose U, Kreslo I, Laudisio F, Lauria A, Ljubicic A, Longhin A, Loverre P, Malenica M, Malgin A, Mandrioli G, Matsuo T, Matveev V, Mauri N, Medinaceli E, Meregaglia A, Mikado S, Miyanishi M, Mizutani F, Monacelli P, Montesi MC, Morishima K, Muciaccia MT, Naganawa N, Naka T, Nakamura M, Nakano T, Niwa K, Ogawa S, Okateva N, Olchevsky A, Ozaki K, Paoloni A, Paparella L, Park BD, Pasqualini L, Pastore A, Patrizii L, Pessard H, Pistillo C, Podgrudkov D, Polukhina N, Pozzato M, Pupilli F, Roda M, Roganova T, Rokujo H, Rosa G, Ryazhskaya O, Sadovsky A, Sato O, Schembri A, Shakiryanova I, Shchedrina T, Shibayama E, Shibuya H, Shiraishi T, Simone S, Sirignano C, Sirri G, Sotnikov A, Spinetti M, Stanco L, Starkov N, Stellacci SM, Stipcevic M, Strolin P, Takahashi S, Tenti M, Terranova F, Tioukov V, Tufanli S, Ustyuzhanin A, Vasina S, Vilain P, Voevodina E, Votano L, Vuilleumier JL, Wilquet G, Wonsak B, Yoon CS. Final Results of the OPERA Experiment on ν_{τ} Appearance in the CNGS Neutrino Beam. Phys Rev Lett 2018; 120:211801. [PMID: 29883136 DOI: 10.1103/physrevlett.120.211801] [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] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Indexed: 06/08/2023]
Abstract
The OPERA experiment was designed to study ν_{μ}→ν_{τ} oscillations in the appearance mode in the CERN to Gran Sasso Neutrino beam (CNGS). In this Letter, we report the final analysis of the full data sample collected between 2008 and 2012, corresponding to 17.97×10^{19} protons on target. Selection criteria looser than in previous analyses have produced ten ν_{τ} candidate events, thus reducing the statistical uncertainty in the measurement of the oscillation parameters and of ν_{τ} properties. A multivariate approach for event identification has been applied to the candidate events and the discovery of ν_{τ} appearance is confirmed with an improved significance level of 6.1σ. |Δm_{32}^{2}| has been measured, in appearance mode, with an accuracy of 20%. The measurement of the ν_{τ} charged-current cross section, for the first time with a negligible contamination from ν[over ¯]_{τ}, and the first direct evidence for the ν_{τ} lepton number are also reported.
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Affiliation(s)
- N Agafonova
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | | | - A Anokhina
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - S Aoki
- Kobe University, J-657-8501 Kobe, Japan
| | - A Ariga
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - T Ariga
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
- Faculty of Arts and Science, Kyushu University, J-819-0395 Fukuoka, Japan
| | - A Bertolin
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - C Bozza
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, I-84084 Fisciano (Salerno), Italy
| | - R Brugnera
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - A Buonaura
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | - S Buontempo
- INFN Sezione di Napoli, I-80126 Napoli, Italy
| | - M Chernyavskiy
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - A Chukanov
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - L Consiglio
- INFN Sezione di Napoli, I-80126 Napoli, Italy
| | - N D'Ambrosio
- INFN-Laboratori Nazionali del Gran Sasso, I-67010 Assergi (L'Aquila), Italy
| | - G De Lellis
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | - M De Serio
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - P Del Amo Sanchez
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France
| | - A Di Crescenzo
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | | | - N Di Marco
- INFN-Laboratori Nazionali del Gran Sasso, I-67010 Assergi (L'Aquila), Italy
| | - S Dmitrievsky
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - M Dracos
- IPHC, Université de Strasbourg, CNRS/IN2P3, F-67037 Strasbourg, France
| | - D Duchesneau
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France
| | - S Dusini
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - T Dzhatdoev
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - J Ebert
- Hamburg University, D-22761 Hamburg, Germany
| | - A Ereditato
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - J Favier
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France
| | - R A Fini
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - F Fornari
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - T Fukuda
- Nagoya University, J-464-8602 Nagoya, Japan
| | - G Galati
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | - A Garfagnini
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - V Gentile
- GSSI-Gran Sasso Science Institute, I-40127 L'Aquila, Italy
| | - J Goldberg
- Department of Physics, Technion, IL-32000 Haifa, Israel
| | - S Gorbunov
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - Y Gornushkin
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - G Grella
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, I-84084 Fisciano (Salerno), Italy
| | - A M Guler
- METU-Middle East Technical University, TR-06800 Ankara, Turkey
| | | | - C Hagner
- Hamburg University, D-22761 Hamburg, Germany
| | - T Hara
- Kobe University, J-657-8501 Kobe, Japan
| | - T Hayakawa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - A Hollnagel
- Hamburg University, D-22761 Hamburg, Germany
| | - K Ishiguro
- Nagoya University, J-464-8602 Nagoya, Japan
| | - A Iuliano
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | - K Jakovcic
- Ruder Bošković Institute, HR-10002 Zagreb, Croatia
| | - C Jollet
- IPHC, Université de Strasbourg, CNRS/IN2P3, F-67037 Strasbourg, France
| | - C Kamiscioglu
- METU-Middle East Technical University, TR-06800 Ankara, Turkey
- Ankara University, TR-06560 Ankara, Turkey
| | - M Kamiscioglu
- METU-Middle East Technical University, TR-06800 Ankara, Turkey
| | - S H Kim
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
| | - N Kitagawa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - B Klicek
- Center of Excellence for Advanced Materials and Sensing Devices, Ruder Bośković Institute, HR-10002 Zagreb, Croatia
| | - K Kodama
- Aichi University of Education, J-448-8542 Kariya (Aichi-Ken), Japan
| | - M Komatsu
- Nagoya University, J-464-8602 Nagoya, Japan
| | - U Kose
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - I Kreslo
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - F Laudisio
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - A Lauria
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | - A Ljubicic
- Ruder Bošković Institute, HR-10002 Zagreb, Croatia
| | - A Longhin
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - P Loverre
- INFN Sezione di Roma, I-00185 Roma, Italy
| | - M Malenica
- Ruder Bošković Institute, HR-10002 Zagreb, Croatia
| | - A Malgin
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - G Mandrioli
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - T Matsuo
- Toho University, J-274-8510 Funabashi, Japan
| | - V Matveev
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - N Mauri
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - E Medinaceli
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - A Meregaglia
- IPHC, Université de Strasbourg, CNRS/IN2P3, F-67037 Strasbourg, France
| | - S Mikado
- Nihon University, J-275-8576 Narashino, Chiba, Japan
| | | | | | | | - M C Montesi
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | | | - M T Muciaccia
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - N Naganawa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - T Naka
- Nagoya University, J-464-8602 Nagoya, Japan
| | - M Nakamura
- Nagoya University, J-464-8602 Nagoya, Japan
| | - T Nakano
- Nagoya University, J-464-8602 Nagoya, Japan
| | - K Niwa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - S Ogawa
- Toho University, J-274-8510 Funabashi, Japan
| | - N Okateva
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - A Olchevsky
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - K Ozaki
- Kobe University, J-657-8501 Kobe, Japan
| | - A Paoloni
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - L Paparella
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - B D Park
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
| | - L Pasqualini
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - A Pastore
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - L Patrizii
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - H Pessard
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France
| | - C Pistillo
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - D Podgrudkov
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - N Polukhina
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
- MEPhI-Moscow Engineering Physics Institute, RUS-115409 Moscow, Russia
| | - M Pozzato
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - F Pupilli
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - M Roda
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - T Roganova
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - H Rokujo
- Nagoya University, J-464-8602 Nagoya, Japan
| | - G Rosa
- INFN Sezione di Roma, I-00185 Roma, Italy
| | - O Ryazhskaya
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - A Sadovsky
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - O Sato
- Nagoya University, J-464-8602 Nagoya, Japan
| | - A Schembri
- INFN-Laboratori Nazionali del Gran Sasso, I-67010 Assergi (L'Aquila), Italy
| | - I Shakiryanova
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - T Shchedrina
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | | | - H Shibuya
- Toho University, J-274-8510 Funabashi, Japan
| | | | - S Simone
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - C Sirignano
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - G Sirri
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - A Sotnikov
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - M Spinetti
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - L Stanco
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - N Starkov
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - S M Stellacci
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, I-84084 Fisciano (Salerno), Italy
| | - M Stipcevic
- Center of Excellence for Advanced Materials and Sensing Devices, Ruder Bośković Institute, HR-10002 Zagreb, Croatia
| | - P Strolin
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80126 Napoli, Italy
| | | | - M Tenti
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - F Terranova
- Dipartimento di Fisica dell'Università di Milano-Bicocca, I-20126 Milano, Italy
| | - V Tioukov
- INFN Sezione di Napoli, I-80126 Napoli, Italy
| | - S Tufanli
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - A Ustyuzhanin
- INFN Sezione di Napoli, I-80126 Napoli, Italy
- HSE-National Research University Higher School of Economics, RUS-101000, Moscow, Russia
| | - S Vasina
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - P Vilain
- IIHE, Université Libre de Bruxelles, B-1050 Brussels, Belgium
| | - E Voevodina
- INFN Sezione di Napoli, I-80126 Napoli, Italy
| | - L Votano
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - J L Vuilleumier
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - G Wilquet
- IIHE, Université Libre de Bruxelles, B-1050 Brussels, Belgium
| | - B Wonsak
- Hamburg University, D-22761 Hamburg, Germany
| | - C S Yoon
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
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5
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Agafonova N, Aleksandrov A, Anokhina A, Aoki S, Ariga A, Ariga T, Bender D, Bertolin A, Bodnarchuk I, Bozza C, Brugnera R, Buonaura A, Buontempo S, Büttner B, Chernyavsky M, Chukanov A, Consiglio L, D'Ambrosio N, De Lellis G, De Serio M, Del Amo Sanchez P, Di Crescenzo A, Di Ferdinando D, Di Marco N, Dmitrievski S, Dracos M, Duchesneau D, Dusini S, Dzhatdoev T, Ebert J, Ereditato A, Fini RA, Fornari F, Fukuda T, Galati G, Garfagnini A, Goldberg J, Gornushkin Y, Grella G, Guler AM, Gustavino C, Hagner C, Hara T, Hayakawa H, Hollnagel A, Hosseini B, Ishiguro K, Jakovcic K, Jollet C, Kamiscioglu C, Kamiscioglu M, Kim JH, Kim SH, Kitagawa N, Klicek B, Kodama K, Komatsu M, Kose U, Kreslo I, Laudisio F, Lauria A, Ljubicic A, Longhin A, Loverre PF, Malgin A, Malenica M, Mandrioli G, Matsuo T, Matsushita T, Matveev V, Mauri N, Medinaceli E, Meregaglia A, Mikado S, Miyanishi M, Mizutani F, Monacelli P, Montesi MC, Morishima K, Muciaccia MT, Naganawa N, Naka T, Nakamura M, Nakano T, Nakatsuka Y, Niwa K, Ogawa S, Olchevsky A, Omura T, Ozaki K, Paoloni A, Paparella L, Park BD, Park IG, Pasqualini L, Pastore A, Patrizii L, Pessard H, Pistillo C, Podgrudkov D, Polukhina N, Pozzato M, Pupilli F, Roda M, Roganova T, Rokujo H, Rosa G, Ryazhskaya O, Sato O, Schembri A, Schmidt-Parzefall W, Shakirianova I, Shchedrina T, Sheshukov A, Shibuya H, Shiraishi T, Shoziyoev G, Simone S, Sioli M, Sirignano C, Sirri G, Sotnikov A, Spinetti M, Stanco L, Starkov N, Stellacci SM, Stipcevic M, Strolin P, Takahashi S, Tenti M, Terranova F, Tioukov V, Tufanli S, Vilain P, Vladymyrov M, Votano L, Vuilleumier JL, Wilquet G, Wonsak B, Yoon CS, Zemskova S. Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment. Phys Rev Lett 2015; 115:121802. [PMID: 26430986 DOI: 10.1103/physrevlett.115.121802] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Indexed: 06/05/2023]
Abstract
The OPERA experiment was designed to search for ν_{μ}→ν_{τ} oscillations in appearance mode, i.e., by detecting the τ leptons produced in charged current ν_{τ} interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the ν_{μ}→ν_{τ} appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth ν_{τ} candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow us to assess the discovery of ν_{μ}→ν_{τ} oscillations in appearance mode with a significance larger than 5σ.
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Affiliation(s)
- N Agafonova
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | | | - A Anokhina
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - S Aoki
- Kobe University, J-657-8501 Kobe, Japan
| | - A Ariga
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - T Ariga
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - D Bender
- METU-Middle East Technical University, TR-06531 Ankara, Turkey
| | - A Bertolin
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - I Bodnarchuk
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - C Bozza
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, I-84084 Fisciano (Salerno), Italy
| | - R Brugnera
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - A Buonaura
- INFN Sezione di Napoli, 80125 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
| | | | - B Büttner
- Hamburg University, D-22761 Hamburg, Germany
| | - M Chernyavsky
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - A Chukanov
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | | | - N D'Ambrosio
- INFN-Laboratori Nazionali del Gran Sasso, I-67010 Assergi (L'Aquila), Italy
| | - G De Lellis
- INFN Sezione di Napoli, 80125 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
| | - M De Serio
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - P Del Amo Sanchez
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France
| | | | | | - N Di Marco
- INFN-Laboratori Nazionali del Gran Sasso, I-67010 Assergi (L'Aquila), Italy
| | - S Dmitrievski
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - M Dracos
- IPHC, Université de Strasbourg, CNRS/IN2P3, F-67037 Strasbourg, France
| | - D Duchesneau
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France
| | - S Dusini
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - T Dzhatdoev
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - J Ebert
- Hamburg University, D-22761 Hamburg, Germany
| | - A Ereditato
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - R A Fini
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - F Fornari
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - T Fukuda
- Toho University, J-274-8510 Funabashi, Japan
| | - G Galati
- INFN Sezione di Napoli, 80125 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
| | - A Garfagnini
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - J Goldberg
- Department of Physics, Technion, IL-32000 Haifa, Israel
| | - Y Gornushkin
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - G Grella
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, I-84084 Fisciano (Salerno), Italy
| | - A M Guler
- METU-Middle East Technical University, TR-06531 Ankara, Turkey
| | | | - C Hagner
- Hamburg University, D-22761 Hamburg, Germany
| | - T Hara
- Kobe University, J-657-8501 Kobe, Japan
| | - H Hayakawa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - A Hollnagel
- Hamburg University, D-22761 Hamburg, Germany
| | - B Hosseini
- INFN Sezione di Napoli, 80125 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
| | - K Ishiguro
- Nagoya University, J-464-8602 Nagoya, Japan
| | - K Jakovcic
- IRB-Rudjer Boskovic Institute, HR-10002 Zagreb, Croatia
| | - C Jollet
- IPHC, Université de Strasbourg, CNRS/IN2P3, F-67037 Strasbourg, France
| | - C Kamiscioglu
- METU-Middle East Technical University, TR-06531 Ankara, Turkey
| | - M Kamiscioglu
- METU-Middle East Technical University, TR-06531 Ankara, Turkey
| | - J H Kim
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
| | - S H Kim
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
| | - N Kitagawa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - B Klicek
- IRB-Rudjer Boskovic Institute, HR-10002 Zagreb, Croatia
| | - K Kodama
- Aichi University of Education, J-448-8542 Kariya (Aichi-Ken), Japan
| | - M Komatsu
- Nagoya University, J-464-8602 Nagoya, Japan
| | - U Kose
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - I Kreslo
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - F Laudisio
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, I-84084 Fisciano (Salerno), Italy
| | - A Lauria
- INFN Sezione di Napoli, 80125 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
| | - A Ljubicic
- IRB-Rudjer Boskovic Institute, HR-10002 Zagreb, Croatia
| | - A Longhin
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - P F Loverre
- INFN Sezione di Roma, I-00185 Roma, Italy
- Dipartimento di Fisica dell'Università di Roma "La Sapienza", I-00185 Roma, Italy
| | - A Malgin
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - M Malenica
- IRB-Rudjer Boskovic Institute, HR-10002 Zagreb, Croatia
| | - G Mandrioli
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - T Matsuo
- Toho University, J-274-8510 Funabashi, Japan
| | | | - V Matveev
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - N Mauri
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - E Medinaceli
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - A Meregaglia
- IPHC, Université de Strasbourg, CNRS/IN2P3, F-67037 Strasbourg, France
| | - S Mikado
- Nihon University, J-275-8576 Narashino, Chiba, Japan
| | | | | | | | - M C Montesi
- INFN Sezione di Napoli, 80125 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
| | | | - M T Muciaccia
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - N Naganawa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - T Naka
- Nagoya University, J-464-8602 Nagoya, Japan
| | - M Nakamura
- Nagoya University, J-464-8602 Nagoya, Japan
| | - T Nakano
- Nagoya University, J-464-8602 Nagoya, Japan
| | | | - K Niwa
- Nagoya University, J-464-8602 Nagoya, Japan
| | - S Ogawa
- Toho University, J-274-8510 Funabashi, Japan
| | - A Olchevsky
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - T Omura
- Nagoya University, J-464-8602 Nagoya, Japan
| | - K Ozaki
- Kobe University, J-657-8501 Kobe, Japan
| | - A Paoloni
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - L Paparella
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - B D Park
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
| | - I G Park
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
| | - L Pasqualini
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - A Pastore
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
| | - L Patrizii
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - H Pessard
- LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France
| | - C Pistillo
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - D Podgrudkov
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - N Polukhina
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - M Pozzato
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - F Pupilli
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - M Roda
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - T Roganova
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - H Rokujo
- Nagoya University, J-464-8602 Nagoya, Japan
| | - G Rosa
- INFN Sezione di Roma, I-00185 Roma, Italy
- Dipartimento di Fisica dell'Università di Roma "La Sapienza", I-00185 Roma, Italy
| | - O Ryazhskaya
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - O Sato
- Nagoya University, J-464-8602 Nagoya, Japan
| | - A Schembri
- INFN-Laboratori Nazionali del Gran Sasso, I-67010 Assergi (L'Aquila), Italy
| | | | - I Shakirianova
- INR-Institute for Nuclear Research of the Russian Academy of Sciences, RUS-117312 Moscow, Russia
| | - T Shchedrina
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - A Sheshukov
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - H Shibuya
- Toho University, J-274-8510 Funabashi, Japan
| | | | - G Shoziyoev
- SINP MSU-Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, RUS-119991 Moscow, Russia
| | - S Simone
- Dipartimento di Fisica dell'Università di Bari, I-70126 Bari, Italy
- INFN Sezione di Bari, I-70126 Bari, Italy
| | - M Sioli
- INFN Sezione di Bologna, I-40127 Bologna, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Bologna, I-40127 Bologna, Italy
| | - C Sirignano
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - G Sirri
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - A Sotnikov
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
| | - M Spinetti
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - L Stanco
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - N Starkov
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - S M Stellacci
- Dipartimento di Fisica dell'Università di Salerno and "Gruppo Collegato" INFN, I-84084 Fisciano (Salerno), Italy
| | - M Stipcevic
- IRB-Rudjer Boskovic Institute, HR-10002 Zagreb, Croatia
| | - P Strolin
- INFN Sezione di Napoli, 80125 Napoli, Italy
- Dipartimento di Fisica dell'Università Federico II di Napoli, I-80125 Napoli, Italy
| | | | - M Tenti
- INFN Sezione di Bologna, I-40127 Bologna, Italy
| | - F Terranova
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
- Dipartimento di Fisica dell'Università di Milano-Bicocca, I-20126 Milano, Italy
| | - V Tioukov
- INFN Sezione di Napoli, 80125 Napoli, Italy
| | - S Tufanli
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - P Vilain
- IIHE, Université Libre de Bruxelles, B-1050 Brussels, Belgium
| | - M Vladymyrov
- LPI-Lebedev Physical Institute of the Russian Academy of Sciences, RUS-119991 Moscow, Russia
| | - L Votano
- INFN-Laboratori Nazionali di Frascati dell'INFN, I-00044 Frascati (Roma), Italy
| | - J L Vuilleumier
- Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), University of Bern, CH-3012 Bern, Switzerland
| | - G Wilquet
- IIHE, Université Libre de Bruxelles, B-1050 Brussels, Belgium
| | - B Wonsak
- Hamburg University, D-22761 Hamburg, Germany
| | - C S Yoon
- Gyeongsang National University, 900 Gazwa-dong, Jinju 660-701, Korea
| | - S Zemskova
- JINR-Joint Institute for Nuclear Research, RUS-141980 Dubna, Russia
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6
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Kang TS, Hong OS, Kim KS, Yoon CS. Hearing among male firefighters: a comparison with hearing data from screened and unscreened male population. J Expo Sci Environ Epidemiol 2015; 25:106-12. [PMID: 25352160 PMCID: PMC4269805 DOI: 10.1038/jes.2014.72] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 08/28/2014] [Indexed: 06/04/2023]
Abstract
We investigated whether hearing loss is associated with firefighting. We conducted cross-sectional study comparing hearing threshold levels (HTLs) of 912 male firefighters with two hearing databases obtained from an otologically normal male Korean population (KONP) and a non-industrial noise-exposed male Korean population (KNINEP), considering age and the main roles of firefighters. Firefighters' age-adjusted HTLs were significantly worse than those of KONP (prevalence ratio (PR)=5.29, P<0.001)but not different from those of KNINEP (PR=0.99, P=0.550). Rescuers (PR=1.005, P<0.001) had worse hearing than the KNINEP after age adjustment. Comparison of firefighters' HTLs (50th and 90th percentiles) with those of KONP and KNINEP by age and frequency showed that firefighters' HTLs had significant increases (poorer hearing) across most age groups and frequencies compared with KONP. Compared with KNINEP, firefighters' HTLs were worse in the younger age groups (<45 years) but not different in the older age groups (>45 years). In conclusion, the hearing thresholds of younger firefighters and rescuers were worse than expected by normal aging alone. Future research should include longitudinal studies to consider variable risk factors, such as military service, smoking, and so on.
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Affiliation(s)
- T S Kang
- Department of Environmental Health and Institute of Health and Environment, Graduate School of Public Health, Seoul National University, Seoul, Korea
| | - O S Hong
- School of Nursing, University of California San Francisco, CA, USA
| | - K S Kim
- Seoul Medical Center, Seoul, Korea
| | - C S Yoon
- Department of Environmental Health and Institute of Health and Environment, Graduate School of Public Health, Seoul National University, Seoul, Korea
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Oh SM, Hwang JY, Yoon CS, Lu J, Amine K, Belharouak I, Sun YK. High electrochemical performances of microsphere C-TiO₂ anode for sodium-ion battery. ACS Appl Mater Interfaces 2014; 6:11295-301. [PMID: 24950122 DOI: 10.1021/am501772a] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
High-power, long-life carbon-coated TiO2 microsphere electrodes were synthesized by a hydrothermal method for sodium ion batteries, and the electrochemical properties were evaluated as a function of carbon content. The carbon coating, introduced by sucrose addition, had an effect of suppressing the growth of the TiO2 primary crystallites during calcination. The carbon coated TiO2 (sucrose 20 wt % coated) electrode exhibited excellent cycle retention during 50 cycles (100%) and superior rate capability up to a 30 C rate at room temperature. This cell delivered a high discharge capacity of 155 mAh g(composite)(-1) at 0.1 C, 149 mAh g(composite)(-1) at 1 C, and 82.7 mAh g(composite)(-1) at a 10 C rate, respectively.
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Affiliation(s)
- Seung-Min Oh
- Department of Energy Engineering and ‡Department of Materials Science and Engineering, Hanyang University , Seoul 133-791, Republic of Korea
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8
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Kim SY, Kim MJ, Yoon CS, Lee MS, Han KH, Lee MJ. Comparison of the reliability of two hydronephrosis grading systems: the Society for Foetal Urology grading system vs. the Onen grading system. Clin Radiol 2013; 68:e484-90. [PMID: 23684519 DOI: 10.1016/j.crad.2013.03.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 03/19/2013] [Accepted: 03/29/2013] [Indexed: 01/11/2023]
Abstract
AIM To compare the reliability of the conventional ultrasonography grading system for hydronephrosis as suggested by the Society for Fetal Urology (SFU) in 1993 and that developed by Onen in 2007. MATERIALS AND METHODS One hundred and eighty kidneys in 90 paediatric patients were assessed by four radiologists using each of the two grading systems twice. The SFU system was graded 0-4 (0 = no hydronephrosis; 1 = visualized only renal pelvis; 2 = plus a few caliceal dilatation; 3 = all calyceal dilatation; 4 = plus parenchymal thinning). The Onen system was graded 0-4 (0 = no hydronephrosis; 1 = only renal pelvic dilatation; 2 = plus caliceal dilatation; 3 = plus <50% renal parenchymal loss; 4 = plus >50% renal parenchymal loss). Cohen's kappa statistic was used to estimate intra- and interobserver agreement. The weighted least-squares approach was used to compare the intra-observer agreement, and bootstrapping was used to compare the interobserver agreement between the two systems. RESULTS Intra-observer agreement was substantial to almost perfect in both the SFU (κ 0.79-0.95) and the Onen (κ 0.66-0.97) grading system without difference. The overall interobserver agreement was substantial in both the SFU (κ 0.61-0.68) and the Onen (κ 0.66-0.76) grading system. However, interobserver agreement was fair to moderate for SFU grades 1 and 2 and Onen grades 2 and 3. CONCLUSION Both the SFU and Onen grading system are reliable with good intra- and interobserver agreement. However, decreased interobserver agreement was demonstrated for SFU grades 1 and 2 and Onen grades 2 and 3.
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Affiliation(s)
- S-Y Kim
- Department of Radiology and Research Institute of Radiological Science, Yonsei University, Severance Children's Hospital, Seoul, Republic of Korea
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Kwon MC, Choi WY, Seo YC, Kim JS, Yoon CS, Lim HW, Kim HS, Ahn JH, Lee HY. Enhancement of the skin-protective activities of Centella asiatica L. Urban by a nano-encapsulation process. J Biotechnol 2011; 157:100-6. [PMID: 21893113 DOI: 10.1016/j.jbiotec.2011.08.025] [Citation(s) in RCA: 15] [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] [Received: 10/25/2010] [Revised: 06/02/2011] [Accepted: 08/18/2011] [Indexed: 10/17/2022]
Abstract
Aqueous extracts of Centella asiatica L. Urban were encapsulated by an edible biopolymer, gelatin, which has no effect on their cosmetic activities. The nanoparticles were w/o-type spherical liposomes that had an average diameter of 115.0nm. The encapsulation efficiency was estimated to be approximately 67%, which was relatively high for these aqueous extracts. The nanoparticles showed lower cytotoxicity (10%) in human skin fibroblast cells than the unencapsulated crude extract (15%) at 1.0mg/ml, this was possibly because a smaller amount of the extract was present in the nanoparticles. The nanoparticles efficiently reduced the expression of matrix metalloproteinase (MMP)-1 in UV-irradiated cells from 136.1% to 77.6% (UV-irradiated control) and inhibited hyaluronidase expression (>60%) at a concentration of 0.5mg/ml, which was higher than the levels produced by the unencapsulated crude extracts. The nanoparticles had a very high flux through mouse skin and also remained at relatively large concentrations in the derma when compared to the unencapsulated crude extracts. These results clearly indicate that the skin-protective activities of C. asiatica were significantly improved through the nano-encapsulation process. These findings also imply that a crude extract can be used and have the same efficacy as purified compounds, which should reduce the purification process and production costs.
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Affiliation(s)
- Min Chul Kwon
- Department of Biomaterials Engineering, Kangwon National University, Chuncheon, 200-701, South Korea
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Seo YC, Choi WY, Kim JS, Yoon CS, Lim HW, Cho JS, Ahn JH, Lee HY. Effect of ultra high pressure processing on immuno-modulatory activities of the fruits of Rubus coreanus Miquel. INNOV FOOD SCI EMERG 2011. [DOI: 10.1016/j.ifset.2011.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Jeong MH, Kim JS, Zou Y, Yoon CS, Lim HW, Ahn J, Lee HY. Enhancement of pheochromocytoma nerve cell growth by consecutive fractionization of Angelica gigas Nakai extracts. Cytotechnology 2010; 62:461-72. [PMID: 20936343 DOI: 10.1007/s10616-010-9300-2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Accepted: 08/25/2010] [Indexed: 02/04/2023] Open
Abstract
This work was to investigate the effect of flavonoids from Angelica gigas Nakai on the proliferation and differentiation of PC12 cells. Several solvents including hexane, chloroform, ethyl acetate, butanol and water consecutively partitioned. We determined the ethanol crude extract of Angelica gigas Nakai. The hexane fraction was shown to contain the highest number of flavonoids as follows; 21.48 mg/g and the composition of the flavonoids was as follows: 12.24 mg/g of quercetin, 4.39 mg/g of myricetin and 2.58 mg/g of catechin. In addition, this hexane fraction greatly increased both cell growth and outgrowth of the neurite, and whose effects were three times higher than those of the other fractions. The length of the neurites was measured as ca. 110 μm in adding 50 μg/mL of the hexane fraction, which was about the same as the case of adding 50 ng/mL of NGF as a positive control. This result indicates that the differentiation of PC12 cells by the addition of the hexane fraction was comparable to the case of adding NGF. The hexane fraction was also determined to prevent apoptosis of PC12 cells by suppressing DNA fragmentation. It is interesting that the mixture of three major flavonoids, quercetin, myricetin and catechin showed stronger activity on, both PC12 cell growth and neuritis outgrowth, than when adding each flavonoid alone. We believe this was due to the synergistic effects of the three flavonoids. The activities of these flavonoids from Angelica gigas Nakai are reported for the first time in this study.
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Affiliation(s)
- Myoung Hoon Jeong
- Department of Biomaterials Engineering, College of Bioscience and Biotechnology, Kangwon National University, Chuncheon, 200-701, South Korea
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Kim JH, An HH, Woo HJ, Yoon CS. The growth mechanism for silicon oxide nanowires synthesized from an Au nanoparticle/polyimide/Si thin film stack. Nanotechnology 2008; 19:125604. [PMID: 21817736 DOI: 10.1088/0957-4484/19/12/125604] [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] [Indexed: 05/31/2023]
Abstract
During pyrolysis of polyimide (PI) thin film, amorphous silicon oxide nanowires (SiO(x)NWs) were produced on a large scale through heat treatment of an Au nanoparticle/PI/Si thin film stack at 1000 °C. It was shown that carbonization of the PI film preceded the nucleation of the SiO(x)NWs. The formation of the SiO(x)NWs was sustained by the oxygen derived from carbonization of the polyimide thin film while Si was provided from the substrate. Au nanoparticles promoted the SiO(x)NW growth by inducing localized melting of the Si substrate and by catalyzing the nanowire growth.
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Affiliation(s)
- J H Kim
- Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
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Baek SY, Kim YH, Oh SO, Lee CR, Yoo CI, Lee JH, Lee H, Sim CS, Park J, Kim JW, Yoon CS, Kim Y. Manganese does not alter the severe neurotoxicity of MPTP. Hum Exp Toxicol 2007; 26:203-11. [PMID: 17439923 DOI: 10.1177/0960327107070567] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We utilized a mice model of Parkinsonism: (1) to evaluate 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced neurotoxicity; and (2) to evaluate whether manganese (Mn) exposure can affect MPTP-induced neurotoxicity. A 2 x 3 experimental design (MPTP x+/- Mn) was as follows: SS, MPTP(-) x Mn(-); SLMn, MPTP(-) x low Mn(+); SHMn, MPTP(-) x high Mn(+); MpS, MPTP(+) x Mn(-); MpLMn, MPTP(+) x low Mn(+); MpHMn, MPTP(+) x high Mn(+). We administered MPTP (30 mg/kg per day) to male C57BL/6 mice intraperitoneally, once a day for 5 days. Subsequently, mice were treated with either 2 or 8 mg/kg of MnCl(2).4H(2)O intraperitoneally, once a day for 3 weeks. Blood and striatal Mn levels were elevated in the Mnexposed groups. The number of tyrosine hydroxylase (TH)-immunoreactive (ir) neurons in the substantia nigra pars compacta were decreased significantly in the MPTP-exposed groups. The densities of TH-ir axon terminals in caudate-putamen (CPU) were significantly decreased in the MPTP-treated groups. However, Mn treatment did not affect MPTP neurotoxicity. The densities of glial fibrillary acidic protein (GFAP)-ir astrocytes in the CPU or globus pallidus were significantly increased in the MPTP-treated groups. Concentrations of dopamine in the striatum were decreased significantly in the MPTP-exposed groups only, but Mn had no effect.
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Affiliation(s)
- S Y Baek
- Department of Anatomy, Pusan National University Medical School, Busan, South Korea
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Abstract
Skeletal muscle metastasis is a rare condition in renal cell carcinoma (RCC). We here present an extremely rare case of late recurrence in a patient with RCC who had multiple muscle metastases 19 years after radical nephrectomy. This case shows that a soft-tissue mass in a patient with a known history of RCC even after curative nephrectomy, particularly with hypervascularity, must be regarded as highly suspicious of skeletal muscle metastasis.
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Affiliation(s)
- J Hur
- Department of Diagnostic Radiology, Yonsei University College of Medicine, Research Institute of Radiological Science, Yongdong Severance Hospital, Seoul, South Korea
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15
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Cha SH, Lim JS, Yoon CS, Koh JH, Chang HI, Kim SW. Production of mycelia and exo-biopolymer from molasses by Cordyceps sinensis 16 in submerged culture. Bioresour Technol 2007; 98:165-8. [PMID: 16387491 DOI: 10.1016/j.biortech.2005.11.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2004] [Revised: 11/02/2005] [Accepted: 11/02/2005] [Indexed: 05/06/2023]
Abstract
The molecular weight of exo-biopolymer obtained from a submerged culture of Cordyceps sinensis 16 consisted of a main unit and a subunit of 126 and 68 kDa, respectively. The optimal medium for the production of mycelia and exo-biopolymer was determined to be molasses containing 2% sucrose, 0.9% yeast extract, 0.3% K2HPO4, and 0.4% CaCl2. Using optimized medium, maximum productions of mycelia and exo-biopolymer in shake-flask culture were 54.0 g/L and 28.4 g/L, respectively. This study suggests that large-scale production of mycelia and exo-biopolymer by C. sinensis 16 is possible in submerged culture.
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Affiliation(s)
- S H Cha
- Department of Chemical and Biological Engineering, Korea University, 5-1 Anam-dong, Sungbuk-gu, Seoul 136-701, Republic of Korea
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16
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Lim SW, Zhao Y, Chua E, Law HY, Yuen Y, Pavanni R, Wong MC, Ng IS, Yoon CS, Puong KY, Lim SH, Tan EK. Genetic analysis of SCA2, 3 and 17 in idiopathic Parkinson's disease. Neurosci Lett 2006; 403:11-4. [PMID: 16687213 DOI: 10.1016/j.neulet.2006.04.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2006] [Revised: 03/31/2006] [Accepted: 04/14/2006] [Indexed: 10/24/2022]
Abstract
Recent reports of SCA2 and SCA3 patients who presented with levodopa responsive parkinsonism have generated considerable interest as they have implications for genetic testing. It is unclear whether ethnic race alone or founder effects within certain geographical region explain such an association. In this study, we conducted genetic analysis of SCA2, 3, 17 in an ethnic Chinese cohort with early onset and familial Parkinson's disease (PD) and healthy controls. A total of 191 subjects comprising of 91 PD and 100 healthy controls were examined. We identified one positive case of SCA2 in an early-onset sporadic PD patient who had CAG 36 repeats, yielding a prevalence of 2.2% in early-onset sporadic PD patients and less than 1.0% in our study PD population. The size of the repeats was lower than the expanded repeats (38-57) in SCA2 patients with ataxia in our population. All the children of the patient were physically normal even though some of them carried the repeat expansion of similar size. No cases and controls were positive for SCA3 and SCA17. We do not think routine screening of SCA2, SCA3 and SCA17 for all idiopathic PD patients is cost-effective in our ethnic Chinese population. However, SCA2 should be a differential diagnosis in young onset sporadic PD when genetic mutations of other known PD genes have been excluded.
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Affiliation(s)
- S W Lim
- Department of Neurology, Singapore General Hospital, Outram Road, Singapore 169608, Singapore
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17
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Lim SK, Yoon CS, Kim CK, Kim YH. Nanoparticles fabricated by selective reaction of Fe100−xPtx alloy films during imidization of polyamic acid. J Colloid Interface Sci 2005; 287:501-6. [PMID: 15925616 DOI: 10.1016/j.jcis.2004.06.084] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2004] [Accepted: 06/27/2004] [Indexed: 11/19/2022]
Abstract
Nanoparticles with different morphology and composition were fabricated inside a polyimide (PI) matrix based on selectively oxidizing a layer of Fe(100-x)Pt(x) alloy metal film sandwiched between two PI precursor layers. Gamma-Fe2O3, Pt, and Fe3Pt nanoparticles were formed in a monolayer between two PI layers, depending on the alloy film composition and curing conditions. These particles were well-crystallized and sized between 4 and 10 nm. X-ray photoelectron spectroscopy confirmed that Fe in the film preferentially reacted with the organic matrix whereas Pt remained metallic throughout the curing process, which enabled fabrication of particles different morphology and composition. This process can be easily extended to other alloy films, which provides an opportunity to fabricate nanoparticles relatively easily with desired composition and morphology embedded in an inert organic matrix.
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Affiliation(s)
- Sung K Lim
- Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea
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18
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Barabas AZ, Cole CD, Barabas AD, Cowan JM, Yoon CS, Waisman DM, Lafreniere R. Presence of immunoglobulin M antibodies around the glomerular capillaries and in the mesangium of normal and passive Heymann nephritis rats. Int J Exp Pathol 2005; 85:201-12. [PMID: 15312125 PMCID: PMC2517517 DOI: 10.1111/j.0959-9673.2004.00395.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Summary Diffuse distribution of small, faintly staining, beaded deposits of rat immunoglobulin M (IgM) around the glomerular capillary blood vessels, and a more intensely staining larger deposition in the mesangium, were observed on the kidney sections of normal rats. As glomerular-fixed nephritogenic antigens are known to be present on the epithelial aspect of the glomerular basement membrane (GBM), especially at the soles of foot processes and at the slit pores, it was assumed that the IgM antibodies were directed against these antigens. Investigation by immunofluorescent antibody double-staining techniques of rat kidney sections obtained from normal and rabbit anti-FX1A-injected rats stained for the nephritogenic antigen showed that a number of antigenic sites in the glomeruli and in the mesangium shared antibody hits by heterologous rabbit IgG and autologous rat IgM antibodies. Most sites in the glomeruli stained specifically for rat IgM or rabbit IgG, but preferentially for the latter. The intensely fluorescent mesangial deposits stained mainly for rat IgM, indicating that at these sites the antigenic material was virtually saturated, while areas at the entry to the mesangial space also stained for rabbit IgG, indicating that at these locations free nephritogenic epitopes were still available for reaction with the anti-FX1A antibody. Western blot analysis have shown that the rabbit anti-rat FX1A IgG and the rat anti-rat KF3 IgM antibodies are directed against the same renal tubular-derived antigen with a molecular weight of 70,000. These experimental findings collectively demonstrate that the heterologous IgG and autologous IgM antibodies are directed against the same nephritogenic antigen, which is found in the glomeruli, the mesangium and the proximal convoluted tubules. Thus, the IgM autoantibody has a possible physiological role but, in addition, there is evidence of active immunophagocytic events, manifested in a rapid and continuous entrapment and expulsion of macromolecules after their processing by the mesangial cells of normal and passive Heymann nephritis rats.
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Affiliation(s)
- Arpad Z Barabas
- Department of Surgery, University of Calgary, Health Sciences Centre, Calgary, Alberta, Canada.
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Lai AHM, Tan ES, Law HY, Yoon CS, Ng ISL. SMN1 deletions among singaporean patients with spinal muscular atrophy. Ann Acad Med Singap 2005; 34:73-7. [PMID: 15726222] [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: 05/01/2023]
Abstract
INTRODUCTION Spinal muscular atrophy (SMA) is an autosomal recessive neuromuscular disorder characterised by degeneration of spinal cord anterior horn cells, leading to muscular atrophy. It is the second most frequent autosomal recessive disease among Caucasian populations with a prevalence of between 1 in 6000 and 1 in 10,000 live births, and a carrier frequency of about 1 in 50. The International SMA Consortium classification defines several types of SMA depending on the age of onset and clinical severity. In the past, the diagnosis of SMA was confirmed by muscle biopsy and, sometimes, electromyography. In 1990, SMA was linked to the 5q13 region of chromosome 5. In 1995, it was found that >95% of patients with SMA have homozygous deletions of exons 7 and 8 of the survival motor neurone 1 (SMN1) gene, one of the candidate genes identified within 5q13. The purpose of our study was to determine the frequency of SMN1 deletions in patients with known SMA and the impact of this on the diagnosis of SMA. MATERIALS AND METHODS Molecular analysis was performed on stored DNA and case notes were reviewed retrospectively. RESULTS Twenty-two (91.7%) out of 24 patients with all types of SMA were homozygously deleted for exons 7 and/or 8 of SMN1. We also report our experience with prenatal diagnosis of SMA. CONCLUSIONS Molecular studies can replace conventional investigations for SMA and have made the option of prenatal diagnosis possible for couples at risk.
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Affiliation(s)
- A H M Lai
- Department of Paediatric Medicine, KK Women's and Children's Hospital, Singapore
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20
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Kang SW, Lee SH, Yoon CS, Kim SW. Conidia production by Beauveria bassiana (for the biocontrol of a diamondback moth) during solid-state fermentation in a packed-bed bioreactor. Biotechnol Lett 2005; 27:135-9. [PMID: 15703878 DOI: 10.1007/s10529-004-7871-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2004] [Accepted: 12/10/2004] [Indexed: 10/25/2022]
Abstract
Conidia of Beauveria bassiana CS-1, which have the potential for the control of the diamondback moth (Plutella xylostella), were produced by solid-state fermentation (SSF) using a packed-bed bioreactor with rice straw and wheat bran. As the packing density and the bed height were increased, the production of conidia decreased. In a packed-bed bioreactor under no aeration and no addition of polypropylene (PP) foam (control), the total average of conidia was 4.9 x 10(8) g-1. The production of conidia was affected more by the addition of PP foam as an inert support than forced aeration and was approx. 23 times higher than that of the control. The total average of conidia produced by B. bassiana was 1.1-1.2 x 10(10) g-1 .
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Affiliation(s)
- S W Kang
- Applied Rheology Center, Korea University, Korea
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21
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Lim SK, Chung KJ, Kim YH, Kim CK, Yoon CS. Synthesis of iron oxide nanoparticles in a polyimide matrix. J Colloid Interface Sci 2004; 273:517-22. [PMID: 15082389 DOI: 10.1016/j.jcis.2004.01.084] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2003] [Accepted: 01/29/2004] [Indexed: 10/26/2022]
Abstract
A monolayer of gamma-Fe(2)O(3) nanoparticles embedded in a polyimide (PI) matrix was fabricated by oxidizing an Fe metal film between two PI precursor layers. There was a critical Fe thickness ( approximately 7 nm) above which a continuous layer of gamma-Fe(2)O(3) film was formed in the PI film. Below the critical Fe thickness, the oxide film broke up into fine particles whose size was approximately 8 nm with narrow size distribution. It was further shown that these nanoparticles could have metallic cores, surrounded by an oxide layer. This method offers a unique way of covering a large surface area with fine magnetic oxide nanoparticles for potential application in high-density data-storage media.
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Affiliation(s)
- Sung K Lim
- Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea
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22
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Abstract
AIM Effects of prolonged habitual cold-water immersion on fibre size and capillarity in vastus lateralis muscle were studied in human beings. The hypothesis tested in the present study was that cold acclimatized human skeletal muscle would have reduced muscle fibre size and higher capillarity, favouring the idea of efficacy of recruitment under cold environment. METHODS Ten women breath-hold divers (BHDs) and 10 active women (controls CONs) participated in this study. Muscle biopsy was obtained from vastus lateralis and determined fibre type composition and capillary density. RESULTS A major finding was that all BHDs revealed a markedly smaller cross-sectional area (CSA) in all fibre types than the CONs, or even than any other morphological data reported in previous investigations. Furthermore, mean CSA of type II fibre (range 1205-2766 microm2) was much smaller than type I fibre (2343-4327 microm2). The number of capillaries per fibre in different fibre types in the BHDs was higher than in the CONs (P < 0.001), and diffusional area was smaller in type II fibres than in type I fibres (P < 0.001). The BHDs and the CONs have similarity in the percentage of type I fibres, but type II fibre was predominant in both groups. Interestingly the proportion of type IIx fibre in the BHDs was higher (31%) than in the CONs (22%). No significant difference was found in the thigh circumference between the groups. CONCLUSION The present study demonstrates that prolonged habitual cold-water immersion may induce a decrease in fibre size and an increase in capillarity in human skeletal muscle.
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Affiliation(s)
- K A Bae
- Human Physiology, Korea National Sport Univesity, Songpa-gu, Seoul, Korea
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23
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Abstract
We report the prevalence and ethnic differences of autosomal-dominant cerebellar ataxia (ADCA) in Singapore. Amongst 204 patients with ataxia who underwent genetic testing for dentatorubral-pallidoluysian atrophy (DRPLA) and for spinocerebellar ataxias (SCA) 1, 2, 3, 6, 7, 8, 10 and 12, 58 (28.4%) patients from 36 families tested positive. SCA 3 was identified in 31 (53.4%) patients from 15 families, SCA 2 in 17 (29.3%) patients from 12 families and SCA 1 in four (6.9%) patients from four families. Other SCA subtypes were rare. SCA 2 was the only subtype identified amongst ethnic Malay and ethnic Indian families. The estimated prevalence of ADCA in Singaporean families was at least 1 : 27,000. Based on the history and ancestry of Singaporeans, our study supported a founder effect for specific SCA subtypes and the association of ethnicity-specific SCA subtypes. Our findings suggest that SCA 2 is relatively common amongst the Malay race and that priority testing for SCA 3 and SCA 2 for ethnic Chinese, and SCA 2 for ethnic Malay, may be cost effective and relevant for the region.
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Affiliation(s)
- Y Zhao
- Department of Clinical Research, Singapore General Hospital, Singapore.
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Yoon HY, Yoon CS, Jeong SW, Kim TJ, Park SY, Chung BH, Choi YM, Lee WC. Prevalence and relative risk of canine dirofilariosis among dogs in Seoul, South Korea. Vet Rec 2002; 151:576-7. [PMID: 12452358 DOI: 10.1136/vr.151.19.576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- H Y Yoon
- College of Veterinary Medicine of Konkuk University, Seoul, Korea
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25
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Takahashi H, Ahn JK, Akikawa H, Aoki S, Arai K, Bahk SY, Baik KM, Bassalleck B, Chung JH, Chung MS, Davis DH, Fukuda T, Hoshino K, Ichikawa A, Ieiri M, Imai K, Iwata YH, Iwata YS, Kanda H, Kaneko M, Kawai T, Kawasaki M, Kim CO, Kim JY, Kim SJ, Kim SH, Kondo Y, Kouketsu T, Lee YL, McNabb JW, Mitsuhara M, Nagase Y, Nagoshi C, Nakazawa K, Noumi H, Ogawa S, Okabe H, Oyama K, Park HM, Park IG, Parker J, Ra YS, Rhee JT, Rusek A, Shibuya H, Sim KS, Saha PK, Seki D, Sekimoto M, Song JS, Takahashi T, Takeutchi F, Tanaka H, Tanida K, Tojo J, Torii H, Torikai S, Tovee DN, Ushida N, Yamamoto K, Yasuda N, Yang JT, Yoon CJ, Yoon CS, Yosoi M, Yoshida T, Zhu L. Observation of a (6)(LambdaLambda)He double hypernucleus. Phys Rev Lett 2001; 87:212502. [PMID: 11736336 DOI: 10.1103/physrevlett.87.212502] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2001] [Indexed: 05/23/2023]
Abstract
A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ( 6)(LambdaLambda)He emitted from a Xi(-) hyperon nuclear capture at rest. The mass of ( 6)(LambdaLambda)He and the Lambda-Lambda interaction energy DeltaB(LambdaLambda) have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of DeltaB(LambdaLambda) is 1.01+/-0.20(+0.18)(-0.11) MeV. This demonstrates that the Lambda-Lambda interaction is weakly attractive.
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Affiliation(s)
- H Takahashi
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
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Kwon M, Yoon CS, Fitzpatrick S, Kassam G, Graham KS, Young MK, Waisman DM. p22 is a novel plasminogen fragment with antiangiogenic activity. Biochemistry 2001; 40:13246-53. [PMID: 11683633 DOI: 10.1021/bi0113420] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tumor or tumor-associated cells cleave circulating plasminogen into three or four kringle-containing antiangiogenic fragments, collectively referred to as angiostatin. Angiostatin blocks tumor growth and metastasis by preventing the growth of endothelial cells that are critical for tumor vascularization. Here, we show that cancer and normal cells convert plasminogen into a novel 22 kDa fragment (p22). Production of this plasminogen fragment in a cell-free system has allowed characterization of the structure and activity of the protein. p22 consists of amino acid residues 78-180 of plasminogen and therefore embodies the first plasminogen kringle (residues 84-162) as well as additional N- and C-terminal residues. Circular dichroism and intrinsic fluorescence spectrum analysis have defined structural differences between p22 and recombinant plasminogen kringle 1 (rK1), therefore suggesting a unique conformation for kringle 1 within p22. Proliferation of capillary endothelial cells but not cells of other lineages was selectively inhibited by p22 in vitro. In addition, p22 prevented vascular growth of chick chorioallantoic membranes (CAMs) in vivo. Furthermore, administration of p22 at low dose suppressed the growth of murine Lewis lung carcinoma (LLC) metastatic foci in vivo. This is the first identification of a single kringle-containing antiangiogenic plasminogen fragment produced under physiological conditions.
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Affiliation(s)
- M Kwon
- Cancer Biology Research Group, Department of Biochemistry & Molecular Biology, University of Calgary, Calgary, Alberta, Canada T2N 4N1
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Abstract
The present study was performed to determine the specific receptor of type HPV-16 using recombinant human papillomavirus-like particle (HPV-16 L1-VLP). The expression levels of alpha(6), beta(1), and beta(4) integrins were determined and compared with the amount of HPV-VLP binding in ten cell lines by flow cytometry. Our results show that the amount of VLP binding and the expression level of alpha(6) integrin are correlated, which was confirmed by an inhibition experiment using antibodies and by immunocytochemistry. Both the expression level of alpha(6) integrin and the amount of HPV-VLP binding were high in cervical cancer cell lines, as the type HPV-16 is the main cause of cervical cancer. The degree of binding of HPV-VLP matched the alpha(6) integrin expression level in cell lines but was not correlated with beta(1) and beta(4) levels, which suggests that alpha(6) integrin is the main receptor of HPV type 16.
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Affiliation(s)
- C S Yoon
- Genome Research Center, Korea Research Institute of Bioscience and Biotechnology, Taejeon, 305-600, Korea
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Won JY, Lee DY, Shim WH, Chang BC, Park SI, Yoon CS, Kwon HM, Park BH, Jung GS. Elective endovascular treatment of descending thoracic aortic aneurysms and chronic dissections with stent-grafts. J Vasc Interv Radiol 2001; 12:575-82. [PMID: 11340135 DOI: 10.1016/s1051-0443(07)61478-x] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
PURPOSE To report our experience of endovascular stent-graft placement in patients with descending thoracic aortic dissections and aneurysms and to evaluate the feasibility, safety, and clinical outcomes of the treatment. MATERIALS AND METHODS Stent-grafts were placed in the descending thoracic aortas of 23 patients with saccular aneurysms (n = 11) and Stanford type B chronic aortic dissections of the descending thoracic and abdominal aorta (n = 12). All stent-grafts were individually constructed of self-expandable stainless steel stents covered with polytetrafluoroethylene. Vascular access was achieved through the femoral artery in all patients. Clinical status of each patient was monitored and postoperative CT was performed within 1 month of the procedure and at 3-12-month intervals after the procedures. RESULTS Successful exclusion of the primary entry tears of dissections and the inlets of saccular aneurysms was achieved in all but two patients with aortic dissection. The overall technical success rate was 91.3% (dissection: 10 of 12 = 83%; aneurysm: 11 of 11 = 100%). All patients in whom technical success was achieved showed complete thrombosis and significant decrease in diameter of the thoracic false lumen (preoperative: 5.3 cm +/- 0.9; postoperative: 4.3 cm +/- 0.9; P = .004) or aneurysm sac (preoperative: 5.3 cm +/- 1.7; postoperative: 2.8 cm +/- 2.5; P = .001). In addition, five patients demonstrated complete resolution of the dissected thoracic false lumen (n = 2) and aneurysm sac (n = 3). However, in all patients with aortic dissection, the abdominal aorta was not significantly changed in size (P = .302) and shape and their false lumen flows remained persistent. Immediate postoperative complications were detected in 12 patients (52%); 10 had fever, leukocytosis, and elevation of C-reactive protein, another had wound infection, and another had transient abdominal pain. Three patients died 2, 3, and 12 months after the procedure: one from septic shock, another from underlying mediastinitis, and the other from an unexplained cause. The remaining 20 patients were well after the procedure (1-9 days; mean, 3 days), without any stent-graft-related complications or discomfort (follow up period: 10-65 mo; mean: 25.1 mo +/- 15.6). The cumulative survival rate after the stent graft was 100% at 30 days and 91% at 12 months. CONCLUSIONS For treatment of aortic dissection and saccular aneurysm of the descending thoracic aorta, endovascular stent-graft repair may be a technically feasible and effective treatment modality.
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Affiliation(s)
- J Y Won
- Department of Diagnostic Radiology, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea
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Lee KH, Yoon CS, Choe KO, Kim MJ, Lee HM, Yoon HK, Kim B. Use of imaging for assessing anatomical relationships of tracheobronchial anomalies associated with left pulmonary artery sling. Pediatr Radiol 2001; 31:269-78. [PMID: 11321746 DOI: 10.1007/s002470000423] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [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: 11/28/2022]
Abstract
BACKGROUND Proper recognition, classification and assessment of the tracheobronchial anatomy are essential for surgical management planning in left pulmonary artery sling (LPAS). OBJECTIVE To demonstrate the various imaging modalities in diagnosing and assessing anatomical relationships with tracheobronchial tree in LPAS. MATERIALS AND METHODS Seven patients (three infants, three children, one adult) with LPAS were evaluated. The confirmative imaging modalities included electron-beam tomography (EBT, n = 2), MRI (n = 1) and helical CT (n = 4). Other imaging modalities included plain chest radiographs (n = 7), barium oesophagogram (n = 2), echocardiography (n = 3), cardiac and pulmonary angiography (n = 2) and bronchoscopy (n = 5). RESULTS There were two cases of type IA, one case of type IIA and four cases of type IIB. All five cases of type II had a long segment of tracheobronchial stenosis. A long segment of thoracic tracheal stenosis was unusually associated in one case of type IA. All confirmative modalities were sufficient for diagnosing LPAS and assessing the tracheobronchial tree anomaly. However, helical CT could not obviate angiography due to associated congenital cardiac defects. CONCLUSIONS Sectional imaging modalities of EBT, MRI and helical CT were all sufficient for diagnosing and assessing the anatomical relationships of the tracheobronchial tree in LPAS.
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Affiliation(s)
- K H Lee
- Department of Diagnostic Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, 146-92 Dogok-dong, Kangnam-ku, Seoul, South Korea, 135-270
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Kassam G, Kwon M, Yoon CS, Graham KS, Young MK, Gluck S, Waisman DM. Purification and characterization of A61. An angiostatin-like plasminogen fragment produced by plasmin autodigestion in the absence of sulfhydryl donors. J Biol Chem 2001; 276:8924-33. [PMID: 11114303 DOI: 10.1074/jbc.m009071200] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Plasmin, a broad spectrum proteinase, is inactivated by an autoproteolytic reaction that results in the destruction of the heavy and light chains of the protein. Recently we demonstrated that a 61-kDa plasmin fragment was one of the major products of this autoproteolytic reaction (Fitzpatrick, S. L., Kassam, G., Choi, K. S., Kang, H. M., Fogg, D. K., and Waisman, D. M. (2000)Biochemistry 39, 1021-1028). In the present communication we have identified the 61-kDa plasmin fragment as a novel four kringle-containing protein consisting of the amino acid sequence Lys(78)-Lys(468). To avoid confusion with the plasmin(ogen) fragment, angiostatin(R) (Lys(78)-Ala(440)), we have named this protein A(61). Unlike angiostatin, A(61) was produced in vitro from plasmin autodigestion in the absence of sulfhydryl donors. A(61) bound to lysine-Sepharose and also underwent a large increase in fluorescence yield upon binding of the lysine analogue, trans-4-aminomethylcyclohexanecarboxylic acid. Circular dichroism suggested that A(61) was composed of 21% beta-strand, 14% beta-turn, 18% 3(1)-helix and 8% 3(10)-helix. A(61) was an anti-angiogenic protein as indicated by the inhibition of bovine capillary endothelial cell proliferation. Plasminogen was converted to A(61) by HT1080 cells and bovine capillary endothelial cells. Furthermore, a plasminogen fragment similar to A(61) was present in the serum of humans as well as normal and tumor-bearing mice. These results establish that plasmin turnover can generate anti-angiogenic plasmin fragments in a nonpathological setting.
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Affiliation(s)
- G Kassam
- Cancer Biology Research Group, Department of Biochemistry, University of Calgary, Calgary, Alberta T2N 4N1, Canada
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Abstract
Computed tomography (CT) and ultrasonography (US) are ideally suited for demonstrating urachal remnant diseases. A patent urachus is demonstrated at longitudinal US and occasionally at CT as a tubular connection between the anterosuperior aspect of the bladder and the umbilicus. An umbilical-urachal sinus manifests at US as a thickened tubular structure along the midline below the umbilicus. A vesicourachal diverticulum is usually discovered incidentally at axial CT, appearing as a midline cystic lesion just above the anterosuperior aspect of the bladder. At US, it manifests as an extraluminally protruding, fluid-filled sac that does not communicate with the umbilicus. Urachal cysts manifest at both modalities as a noncommunicating, fluid-filled cavity in the midline lower abdominal wall located just beneath the umbilicus or above the bladder. Both infected urachal cysts and urachal carcinomas commonly display increased echogenicity at US and thick-walled cystic or mixed attenuation at CT, making it difficult to differentiate between them. Percutaneous needle biopsy or fluid aspiration is usually needed for diagnosis and therapeutic planning. Nevertheless, CT and US can help identify most disease entities originating from the urachal remnant in the anterior abdominal wall. Understanding the anatomy and the imaging features of urachal remnant diseases is essential for correct diagnosis and proper management.
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Affiliation(s)
- J S Yu
- Department of Diagnostic Radiology and the Research Institute of Radiological Science, Yonsei University College of Medicine, YongDong Severance Hospital, 146-92 Dogok-Dong, Gangnam-Gu, Seoul 135-270, South Korea.
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Law HY, Ng IS, Yoon CS, Zhao Y, Wong MC. Trinucleotide repeat analysis of Huntington's disease gene in Singapore. Ann Acad Med Singap 2001; 30:122-7. [PMID: 11379408] [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: 02/20/2023]
Abstract
INTRODUCTION Huntington's disease (HD) is an inherited neurodegenerative disorder characterised by chorea and progressive dementia. The mutation causing the disease has been identified as an unstable expansion of a trinucleotide (CAG)n. We have assessed the (CAG)n repeats in the patients and controls in our population. MATERIALS AND METHODS Polymerase chain reactions (PCRs) for the repeat region were carried out for 116 individuals: 10 were asymptomatic at-risk members from 5 families; 53 symptomatic patients from various hospitals; and 53 normal unrelated Singaporeans. Estimation of the number of repeats was based on Metaphor gel electrophoresis, sizing using the GeneScan on ABI 310 Genetic Analyzer, and sequencing using the same equipment. RESULTS Metaphor gel sizing generally gives an over-estimation, and GeneScan gives an under-estimation of repeat numbers compared with sequencing which is the gold standard. Of the 63 patients and family members tested, 25 had one expanded allele of 40 to 54 CAG repeats and the other allele in the normal range of 15 to 30 repeats. One patient had an allele in the intermediate range (38). CONCLUSION The range of CAG repeats in the normal and HD alleles in our population is similar to those reported elsewhere. An accurate sizing can only be obtained with sequencing. For allele sizes in the intermediate range (37-40), sequencing should be carried out to confirm the carrier status of a patient.
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Affiliation(s)
- H Y Law
- DNA Diagnostic and Research Laboratory, Genetics Service, Department of Paediatric Medicine, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore 229899.
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Yoon CS, Ryu YH, Kim DI, Park CI, Lee S, Yoon PH, Jeon TJ, Lee JD. Perirolandic hypoperfusion on single-photon emission computed tomography in term infants with perinatal asphyxia: comparison with MRI and clinical findings. Neuroradiology 2000; 42:908-12. [PMID: 11198211 DOI: 10.1007/s002340000357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We describe the findings on single-photon emission computed tomography (SPECT) in patients with perinatal asphyxia at term, with perirolandic cortico-subcortical changes on MRI, and to correlate them with clinical features. SPECT of 7 patients was obtained after injection of 185-370 MBq of Tc-99m-ECD (ethyl cysteinate dimer). The patients had spastic quadriplegia (7/7) with perinatal asphyxia (6/7) at term (7/7). The results were correlated with the MRI findings. Hypoperfusion of the perirolandic cortex was clearly seen on SPECT in all patients, even in two with subtle changes on MRI. SPECT demonstrated a more extensive area of involvement than MRI, notably in the cerebellum (in 4), the thalamus (in 7) and basal ganglia (in 5), where MRI failed to show any abnormalities.
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Affiliation(s)
- C S Yoon
- Division of Nuclear Medicine, Department of Diagnostic Radiology, Yongdong Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Abstract
Mesenchymal hamartoma of the chest wall is a rare tumor with about 53 reported cases in the English literature. We reviewed six chest wall mesenchymal hamartomas in four patients, including two cases with multiple lesions, with specific focus on the radiologic and pathologic correlation. All cases occurred in neonates or infants with ages ranging from seven hours to seven months. They were diagnosed with plain chest radiographs (n=6), ultrasonography (n=2), chest CT scan (n=6), whole body bone scan (n=2) and MRI (n=3). All cases except a small one without cystic change showed the typical features of mesenchymal hamartoma radiographically and pathologically. Radiologically they were well-circumscribed masses with solid and cystic components with multiple fluid-fluid levels in association with single or multiple rib destruction or change. The CT scan showed the typical findings of chest wall hamartoma, and the MR showed heterogeneous signal intensities of the mass on T1- and T2-weighted images. The MR also revealed more concisely a secondary aneurysmal bone cyst formation with multiple fluid-fluid levels on the T2-weighted image. Microscopically, they showed alternating areas of cartilaginous islands and primitive appearing mesenchymal proliferation, which corresponded well with the solid component on the radiologic findings. The areas of bone formation and blood-filled cystic spaces matched the calcified or ossified densities and the cystic components, respectively. A small case without cystic change showed peculiar radiological and pathological findings resembling an osteochondroma. In conclusion, mesenchymal hamartoma of the chest wall in infancy is quite rare and sometimes can be misdiagnosed as malignancy due to the bone-destroying radiographic appearance and the highly cellular and mitotically active microscopic features, unless the radiologists and pathologists are aware of the characteristic clinical, radiological, and pathological findings. Imaging studies can usually make a correct diagnosis with good correlation to the pathologic findings.
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Affiliation(s)
- J Y Kim
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
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Lee JY, Yoon CS, Chung IY, Lee YS, Lee EK. Scale-up process for expression and renaturation of recombinant human epidermal growth factor from Escherichia coli inclusion bodies. Biotechnol Appl Biochem 2000; 31:245-8. [PMID: 10814596 DOI: 10.1042/ba19990101] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A cDNA encoding mature epidermal growth factor (EGF) was isolated and cloned into a pQE30 vector in which the His(6)-tagged EGF was expressed. pH-stat feeding of concentrated medium at the time of isopropyl beta-D-thiogalactoside induction and slug-feedings of the enriched medium during the induction resulted in a higher cell density and specific expression. Using a simple refolding protocol that consisted of 1 mM L-cysteine addition for a 1-h reduction followed by 5 mM L-cystine addition for oxidative refolding, we were able to convert nearly all EGF monomers into the oxidized form. Also, there folding aggregate was converted into the monomeric form. Approx. 50% overall yield was obtained from the dissolved inclusion bodies to a single peak under FPLC. We hope that the result of this study may provide information that is useful for the scale-up of the recombinant human EGF production process.
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Affiliation(s)
- J Y Lee
- Department of Chemical Engineering, Hanyang University, Ansan, Korea 425-791
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Kim MJ, Park YN, Han SJ, Yoon CS, Yoo HS, Hwang EH, Chung KS. Biliary atresia in neonates and infants: triangular area of high signal intensity in the porta hepatis at T2-weighted MR cholangiography with US and histopathologic correlation. Radiology 2000; 215:395-401. [PMID: 10796915 DOI: 10.1148/radiology.215.2.r00ma04395] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE To correlate a triangular area of high signal intensity in the porta hepatis on T2-weighted magnetic resonance (MR) cholangiograms of biliary atresia with ultrasonographic (US) and histopathologic findings in a portal mass observed during a Kasai procedure. MATERIALS AND METHODS Twenty-one consecutive neonates and infants (age range, 13-88 days; mean age, 59 days) with cholestasis underwent US and single-shot MR cholangiography. In 12 patients with biliary atresia diagnosed at histopathologic examination, MR cholangiographic findings in the porta hepatis were correlated with US and histopathologic findings in the portal mass. RESULTS At US, eight of the 12 patients had round, linear, or tubular hypoechoic portions within a triangular cord; MR cholangiography revealed a triangular area of high signal intensity confined to the porta hepatis. Histopathologic examination of the portal mass revealed a cystic or cleftlike lesion surrounded by loose myxoid mesenchyme and platelike fetal bile ducts. Neither the large cystic lesion without ductal epithelium nor the small cleftlike lesion with scanty epithelium demonstrated bile staining. Similar areas of high signal intensity were not seen on T2-weighted images in the remaining patients (four with biliary atresia and nine with neonatal hepatitis). CONCLUSION In biliary atresia, T2-weighted single-shot MR cholangiography can show a triangular area of high signal intensity in the porta hepatis that may represent cystic dilatation of the fetal bile duct.
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Affiliation(s)
- M J Kim
- Department of Diagnostic Radiology, Severance Hospital, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-ku, Seoul, South Korea.
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Tan BS, Law HY, Zhao Y, Yoon CS, Ng IS. DNA testing for fragile X syndrome in 255 males from special schools in Singapore. Ann Acad Med Singap 2000; 29:207-12. [PMID: 10895341] [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: 02/17/2023]
Abstract
INTRODUCTION Fragile X syndrome, the most common cause of inherited mental retardation, results from unstable expansion of a trinucleotide (CGG)n repeat in the FMR1 gene. Phenotypic expression is variable making clinical diagnosis difficult, while diagnosis by Southern blotting is relatively expensive and labour intensive. The prevalence in Singapore has not been studied. MATERIALS AND METHODS We developed a rapid screening test using a PCR analysis. We studied 255 males with unexplained cause for learning difficulties from 8 special schools. A clinical scoring system based on characteristic features described was devised. RESULTS PCR analysis showed absence of the band for the normal allele in 11 samples, 6 of which were confirmed by Southern blotting to be positive for FMR1 expansion, giving a 2% false-positive rate with PCR. Sensitivity of the PCR test was evaluated by performing Southern blotting in all PCR-normal samples; all of which were confirmed to be normal. This PCR test was shown to be highly reproducible. Clinical criteria were not predictive. CONCLUSIONS Six (2.4%) new cases of fragile X syndrome were detected. There is a need to incorporate fragile X testing in routine screening of patients with developmental delay and learning difficulties. The use of PCR could eliminate the need for Southern blotting in up to 95% of cases. PCR analysis provides a simple, reliable and rapid tool for screening.
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Affiliation(s)
- B S Tan
- Department of Paediatric Medicine, KK Women's and Children's Hospital, Singapore
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Abstract
PURPOSE To describe the CT and MR findings of primary malignant rhabdoid tumor (MRT) of the brain, which is a rare but very aggressive neoplasm in childhood. MATERIALS AND METHODS Retrospectively, we evaluated the CT and MR findings of 5 patients of primary MRT of the brain with a review of clinical records. RESULTS The primary MRTs of the brain were large (n = 4) with a tendency to be associated with necrosis, hemorrhage (n = 2) and calcification (n = 2). Solid components of the tumor showed increased attenuation on precontrast CT scan and iso- or slightly hyper-signal intensity on T2-weighted images probably due to hypercellularity. Solid components of the tumor were also well enhanced on contrast-enhanced CT scan (n = 5) and MRI (n = 2). In 1 case with intratumoral bleeding, MR findings were variable on T1-weighted and T2-weighted images. Intracranial and intraspinal metastasis were found in 2 cases on preoperative MR studies. Follow-up CT and MR studies showed recurrence of the tumor and/or leptomeningeal metastasis in 3 cases. CONCLUSIONS Although CT and MR findings of primary MRT of the brain are nonspecific, a tendency toward large size, calcification and intratumoral bleeding may be attributed to CT and MR findings. The solid components of tumors could present hyperdense on precontrast CT scan and iso- or slightly hyper-signal intensity on T2-weighted MR image. Preoperative and follow-up MR studies are important to detect metastatic foci.
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Affiliation(s)
- C S Yoon
- Department of Diagnostic Radiology, Yonsei University College of Medicine, Seoul, Korea.
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Abstract
We report two cases of magnetic resonance imaging of the cutaneous hamartoma on the hand, which is a rare benign soft tissue tumor.
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Affiliation(s)
- D H Ha
- Department of Diagnostic Radiology, Pundang CHA General Hospital, College of Medicine, Pochon CHA University, Sungnam, Korea. dhha@myho menet.co.kr
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Abstract
We have isolated a new maternal gene called 4G2. 4G2 cDNA encodes a predicted protein of 501 amino acids, and its apparent molecular mass of 61 kDa was determined by SDS-PAGE of 4G2 recombinant protein expressed in E. coli or in vitro translated in rabbit reticulocyte lysate. Amino acid analysis of 4G2 revealed the RGD and LDV motif with a potential cell attachment activity. The open reading frames (ORF) also contained a consensus bipartite nuclear localization signal (NLS). There were number of expressed tag sequences (ESTs) from Drosophila, zebrafish, chicken, mouse, and human origin that encode a high degree of identity to the predicted 4G2 protein, thereby suggesting that 4G2 may constitute a novel gene family whose function has not been elucidated. We also present evidence that 4G2 transcript is maternally synthesized in stage IV oocyte, localized to animal hemisphere of egg, and zygotically reactivated in mid-neurula stage.
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Affiliation(s)
- S Shim
- Department of Life Science, Pohang University of Science and Technology, San 31 Hyoja-Dong, Pohang, Kyungbuk, 790-784, South Korea
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Yoon JW, Yoon CS, Lim HW, Huang QQ, Kang Y, Pyun KH, Hirasawa K, Sherwin RS, Jun HS. Control of autoimmune diabetes in NOD mice by GAD expression or suppression in beta cells. Science 1999; 284:1183-7. [PMID: 10325232 DOI: 10.1126/science.284.5417.1183] [Citation(s) in RCA: 196] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Glutamic acid decarboxylase (GAD) is a pancreatic beta cell autoantigen in humans and nonobese diabetic (NOD) mice. beta Cell-specific suppression of GAD expression in two lines of antisense GAD transgenic NOD mice prevented autoimmune diabetes, whereas persistent GAD expression in the beta cells in the other four lines of antisense GAD transgenic NOD mice resulted in diabetes, similar to that seen in transgene-negative NOD mice. Complete suppression of beta cell GAD expression blocked the generation of diabetogenic T cells and protected islet grafts from autoimmune injury. Thus, beta cell-specific GAD expression is required for the development of autoimmune diabetes in NOD mice, and modulation of GAD might, therefore, have therapeutic value in type 1 diabetes.
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Affiliation(s)
- J W Yoon
- Laboratory of Viral and Immunopathogenesis of Diabetes, Julia McFarlane Diabetes Research Centre, Faculty of Medicine, University of Calgary, Calgary, Alberta T2N 4N1, Canada.
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Abstract
Fibroblast viability of a natural tissue valve for replacing a defective heart valve through allograft or xenograft has been suggested to affect its clinical durability. In this study, the cell viability and enzymatic activity of porcine heart valve leaflets were examined in regard to concerning to the preservation process [variable warm ischemic time (WIT), cold ischemic time (CIT), and cryopreservation]. Porcine heart enblocs were obtained and valve dissection was performed after 2, 12, 24, or 36 hours, in respective groups A, B, C, and D, as WIT. Each group was stored for 24 hours as CIT and cryopreserved. Leaflets were dissected from a valved conduit after each process, and cell viability and enzymatic activity in the leaflet were investigated using trypan blue staining and API ZYM kits. WIT extension significantly decreased fibroblast viability (p < 0.05, 92.25 +/- 2.7% at 2 hours, 84.9 +/- 6.7% at 12 hours, 57.0 +/- 10.2% at 24 hours, 55.9 +/- 7.9% at 36 hours), while CIT for 24 hours was also influenced significantly (p < 0.05), whereas cryopreservation demonstrated no effect on cellular viability. In enzyme activity observation, several enzymes related to lipid or nucleotide degradation (esterase, esterase lipase, particularly phosphatase, phosphohydrolase) were remarkably changed following the valve-fabrication process. After 24 hours CIT, these enzymatic activities in groups B, C and D significantly increased, but the activities decreased after cryopreservation. Particularly, both the viability and enzymatic activity showed remarkable changes after CIT in group B (WIT = 12 hours). These results suggest that WIT is more important than CIT in maintaining viability of the valve, and that completing all the cryopreservation process within 12 hours after acquisition is recommended.
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Affiliation(s)
- H Suh
- Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea.
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Abstract
It has been well documented that the extracellular matrix components fibronectin and laminin promote or regulate morphogenesis of the myocardial cells in mammalian heart. However, their chronological change of expression (or localization) in the human heart remains elusive. In this study, fibronectin and laminin in the left ventricle of forty-two human fetuses aged from 8 to 26 weeks gestation and left ventricular tissues obtained from a 2-week old infant and two adults were investigated by Western blot analyses and indirect immunofluorescence technique with monoclonal antibodies. In the fetal heart, fibronectins were present along the endocardium, epicardium, and linings of larger blood vessels. In 14-16 weeks gestation, fibronectin immunofluorescence became stronger but not evenly dispersed in the interstitium. After 24 weeks gestation, they were strongly positive only in the relatively larger blood vessels, as well as those in the infant and adult cardiac tissues. Laminins were strongly positive along the endocardium and basement membrane of the myocardial cells and fibroblasts during fetal life. After birth, laminins formed fine fibrillar network along the basement membrane in association with the transverse tubules of myocardial cell; these morphological characteristics remained in the adult cardiac tissues. These results indicate that fibronectin expression is relatively constant during fetal life but decreases after birth; in contrast, laminin expression is not age-dependent and constant throughout the life.
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Affiliation(s)
- H Kim
- Department of Histology, College of Medicine, Chung-Ang University, Seoul, Korea (South).
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Abstract
We have shown previously that the inactivation of macrophages in nonobese diabetic (NOD) mice results in the prevention of diabetes; however, the mechanisms involved remain unknown. In this study, we found that T cells in a macrophage-depleted environment lost their ability to differentiate into beta cell-cytotoxic T cells, resulting in the prevention of autoimmune diabetes, but these T cells regained their beta cell-cytotoxic potential when returned to a macrophage-containing environment. To learn why T cells in a macrophage-depleted environment lose their ability to kill beta cells, we examined the islet antigen-specific immune response and T cell activation in macrophage-depleted NOD mice. There was a shift in the immune balance, a decrease in the T helper cell type 1 (Th1) immune response, and an increase in the Th2 immune response, due to the reduced expression of the macrophage-derived cytokine IL-12. As well, there was a deficit in T cell activation, evidenced by significant decreases in the expression of Fas ligand and perforin. The administration of IL-12 substantially reversed the prevention of diabetes in NOD mice conferred by macrophage depletion. We conclude that macrophages play an essential role in the development and activation of beta cell-cytotoxic T cells that cause beta cell destruction, resulting in autoimmune diabetes in NOD mice.
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Affiliation(s)
- H S Jun
- Julia McFarlane Diabetes Research Centre, Department of Microbiology and Infectious Diseases, Faculty of Medicine, The University of Calgary, Calgary, Alberta, Canada T2N 4N1
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Masai I, Suzuki E, Yoon CS, Kohyama A, Hotta Y. Immunolocalization of Drosophila eye-specific diacylgylcerol kinase, rdgA, which is essential for the maintenance of the photoreceptor. J Neurobiol 1997; 32:695-706. [PMID: 9183747 DOI: 10.1002/(sici)1097-4695(19970620)32:7<695::aid-neu5>3.0.co;2-#] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The Drosophila retinal degeneration A (rdgA) mutant has photoreceptor cells that degenerate within a week after eclosion. The degeneration starts with the disruption of the subrhabdomeric cisternae (SRC), which are the organelles essential for the transport of phospholipids to the photoreceptive membranes. Our previous biochemical and molecular studies suggested that the rdgA gene encodes an eye-specific diacylglycerol kinase (DGK). In this study, we show that retinal degeneration is prevented by the introduction of the eye-DGK gene in the rdgA mutant genome, suggesting that the DGK activity is crucial for the maintenance of the photoreceptor. Furthermore, by immunohistochemical analysis, we have demonstrated that the rdgA protein is predominantly associated with the SRC, suggesting that the conversion from diacylglycerol (DG) to phosphatidic acid (PA) most actively occurs in SRC. The analysis of the eyes of mutants homozygous for rdgA and eye-protein kinase C mutations indicates that retinal degeneration is caused by the deficiency of PA rather than excessive accumulation of DG. From these data, we conclude that the production of PA in the SRC membranes is essential for the maintenance of the photoreceptor.
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Affiliation(s)
- I Masai
- Molecular Genetics Research Laboratory, University of Tokyo, Japan
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Yoon CS, Hirosawa K, Suzuki E. Corneal lens secretion in newly emerged Drosophila melanogaster examined by electron microscope autoradiography. J Electron Microsc (Tokyo) 1997; 46:243-246. [PMID: 9279017 DOI: 10.1093/oxfordjournals.jmicro.a023515] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Drosophila corneal lens secretion was studied by electron microscope autoradiography of [3H]amino acids (leucine, lysine, phenylalanine, proline and tyrosine) and [3H]sugars (glucosamine and mannose) in newly emerged flies. Ommatidial lenses were homogeneously labelled with both tracers at low levels, suggesting that lens materials turn over continuously after lens formation is completed. In contrast, ocellar lenses were heavily labelled, indicating that deposition of ocellar lens cuticle is still active at this stage. [3H]amino acids and [3H]sugars were deposited in distinct patterns in ocelli. Although over 90% of [3H] sugars remained, even after 3 h after application, within 1 micron of the apices of corneagenous cells associated with lens bases, [3H]amino acids distributed diffusely. There was an obvious gradient of [3H]sugars from center to periphery of the lens base, suggesting that structure of the corneal lens in dorsal ocelli is determined by spatially regulated secretion of chitin by corneagenous cells.
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Affiliation(s)
- C S Yoon
- Department of Fine Morphology, University of Tokyo, Japan
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Abstract
Choosing optimum pair of capturing antibody and detecting antibody when developing monoclonal antibody (MAb)-based, sandwich enzyme-linked immunosorbent assays is a time-consuming process requiring the coupling of individual antibodies to an enzyme like horseradish peroxidase or alkaline phosphatase. The MAbs required for the two-site sandwich ELISA should bind to distinct epitopes of the antigen, and their binding should not be mutually exclusive. To determine if two monoclonal antibodies would occupy distinct sites of their antigen in binding, an enzyme-linked immunosorbent assay was devised, which is easy-to-use and does not require any coupling of monoclonal antibodies to enzymes. Microplate wells are coated with rabbit polyclonal antibodies raised against the same antigen of MAbs. After blocking, a limited amount of the antigen is added for incubation with the rabbit antibodies. Mouse monoclonal antibody 1 (MAb 1) is added to saturation. A serial dilution of MAb 2 (for analysis) or MAb 1 (for control) is added subsequently. An enzyme-labeled, goat anti-mouse secondary antibody and its substrates are added for color development. Thus, the epitope competition of two MAbs for their antigen binding is easily determined by the measurement and comparison of color development between the two MAb additions.
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Affiliation(s)
- J W Kwak
- Protein Engineering Group, Korea Research Institute of Bioscience and Biotechnology, Taejon, South Korea.
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Yoon CS, Hirosawa K, Suzuki E. Studies on the structure of ocellar photoreceptor cells of Drosophila melanogaster with special reference to subrhabdomeric cisternae. Cell Tissue Res 1996; 284:77-85. [PMID: 8601298 DOI: 10.1007/s004410050568] [Citation(s) in RCA: 18] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We studied the structure of ocellar photoreceptor cells of Drosophila melanogaster, particularly the subrhabdomeric cisternae which our previous studies have shown to be essential structures for turnover of photoreceptive membranes in compound eyes. Each ocellus contained elongated photoreceptor cells with rhabdomeres positioned distally. In the subrhabdomeric regions, endocytotic invaginations were frequently observed, suggesting active turnover of photoreceptive membranes. In the vicinity of the photoreceptive microvilli, membranous structures similar to the subrhabdomeric cisternae in compound eyes were observed. These membranous structures were immunopositive for the rdgB protein, a phosphatidylinositol transfer protein that is localized to the subrhabdomeric cisternae in compound eyes. The ocellar photoreceptor cells of the retinal degeneration mutants (rdgA,B) were also studied. In these mutants, retinal degeneration has been reported to start, in compound eyes, with the disappearance of the subrhabdomeric cisternae. We found that the ocellar subrhabdomeric cisternae also disappear during the initial stage of retinal degeneration. From these observations, we conclude that the mechanism of photoreceptive membrane turnover in ocellar photoreceptor cells involves the rdgB and probably the rdgA proteins which are associated with subrhabdomeric cisternae, as is the case for photoreceptive membrane turnover in compound eyes.
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Affiliation(s)
- C S Yoon
- Department of Fine Morphology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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Law HY, Ong J, Yoon CS, Cheng H, Tan CL, Ng I. Rapid antenatal diagnosis of beta-thalassemia in Chinese caused by the common 4-bp deletion in codons 41/42 using high-resolution agarose gel electrophoresis and heteroduplex detection. Biochem Med Metab Biol 1994; 53:149-51. [PMID: 7710772 DOI: 10.1006/bmmb.1994.1071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The 4-bp deletion in codons 41/42 (-TTCT) in the beta-globin gene is a common mutation that causes beta-thalassemia in Chinese. A simple method, which involved PCR amplification of the relevant region, was used for the antenatal diagnosis of a fetus at risk for this mutation. The fetal PCR product showed a single fragment of normal size on MetaPhor gel. The homozygous normal status was further confirmed by the generation of heteroduplexes only after addition of homozygous mutant DNA.
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Affiliation(s)
- H Y Law
- Department of Pediatrics, Singapore General Hospital
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Yoo HS, Park CH, Lee JT, Kim KW, Yoon CS, Suh JH, Park CY, Kim BS, Choi HJ, Lee KS. Small hepatocellular carcinoma: high dose internal radiation therapy with superselective intra-arterial injection of I-131-labeled Lipiodol. Cancer Chemother Pharmacol 1994; 33 Suppl:S128-33. [PMID: 8137473 DOI: 10.1007/bf00686684] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The aim of the present study was to deliver a high internal radiation dose to small hepatocellular carcinoma (HCC) lesions in an attempt to treat this disease. A total of 18 patients with HCC lesions measuring less than 4.5 cm in diameter (25 lesions) were treated with superselective intra-arterial injection of I-131-labeled Lipiodol (370-1,100 MBq in 3-5 ml) using a 5-F or coaxial catheter. All the lesions were nodular, multinodular, or hypervascular on pretreatment angiography. In all, 15 lesions that received over 180 Gy of cumulative radiation decreased in size in proportion to the Lipiodol retention on CT, and no pericapsular recurrence was found on angiography after 14-54 months of follow-up. In five patients who subsequently underwent surgery, 65% to 100% tumor necrosis was detected. No abnormal change in liver function tests or untoward clinical symptom of the lung, thyroid, or bone marrow was detected in patients who survived for more than 3 years after the treatment. Superselective high-dose internal radiation therapy of small HCC offers hope of treatment and long-term local control without complications.
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Affiliation(s)
- H S Yoo
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
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