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Aprile E, Aalbers J, Agostini F, Alfonsi M, Amaro FD, Anthony M, Arneodo F, Barrow P, Baudis L, Bauermeister B, Benabderrahmane ML, Berger T, Breur PA, Brown A, Brown A, Brown E, Bruenner S, Bruno G, Budnik R, Bütikofer L, Calvén J, Cardoso JMR, Cervantes M, Cichon D, Coderre D, Colijn AP, Conrad J, Cussonneau JP, Decowski MP, de Perio P, Di Gangi P, Di Giovanni A, Diglio S, Eurin G, Fei J, Ferella AD, Fieguth A, Fulgione W, Gallo Rosso A, Galloway M, Gao F, Garbini M, Gardner R, Geis C, Goetzke LW, Grandi L, Greene Z, Grignon C, Hasterok C, Hogenbirk E, Howlett J, Itay R, Kaminsky B, Kazama S, Kessler G, Kish A, Landsman H, Lang RF, Lellouch D, Levinson L, Lin Q, Lindemann S, Lindner M, Lombardi F, Lopes JAM, Manfredini A, Mariş I, Marrodán Undagoitia T, Masbou J, Massoli FV, Masson D, Mayani D, Messina M, Micheneau K, Molinario A, Morå K, Murra M, Naganoma J, Ni K, Oberlack U, Pakarha P, Pelssers B, Persiani R, Piastra F, Pienaar J, Pizzella V, Piro MC, Plante G, Priel N, Rauch L, Reichard S, Reuter C, Riedel B, Rizzo A, Rosendahl S, Rupp N, Saldanha R, Dos Santos JMF, Sartorelli G, Scheibelhut M, Schindler S, Schreiner J, Schumann M, Scotto Lavina L, Selvi M, Shagin P, Shockley E, Silva M, Simgen H, Sivers MV, Stein A, Thapa S, Thers D, Tiseni A, Trinchero G, Tunnell C, Vargas M, Upole N, Wang H, Wang Z, Wei Y, Weinheimer C, Wulf J, Ye J, Zhang Y, Zhu T. First Dark Matter Search Results from the XENON1T Experiment. Phys Rev Lett 2017; 119:181301. [PMID: 29219593 DOI: 10.1103/physrevlett.119.181301] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Indexed: 06/07/2023]
Abstract
We report the first dark matter search results from XENON1T, a ∼2000-kg-target-mass dual-phase (liquid-gas) xenon time projection chamber in operation at the Laboratori Nazionali del Gran Sasso in Italy and the first ton-scale detector of this kind. The blinded search used 34.2 live days of data acquired between November 2016 and January 2017. Inside the (1042±12)-kg fiducial mass and in the [5,40] keV_{nr} energy range of interest for weakly interacting massive particle (WIMP) dark matter searches, the electronic recoil background was (1.93±0.25)×10^{-4} events/(kg×day×keV_{ee}), the lowest ever achieved in such a dark matter detector. A profile likelihood analysis shows that the data are consistent with the background-only hypothesis. We derive the most stringent exclusion limits on the spin-independent WIMP-nucleon interaction cross section for WIMP masses above 10 GeV/c^{2}, with a minimum of 7.7×10^{-47} cm^{2} for 35-GeV/c^{2} WIMPs at 90% C.L.
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Affiliation(s)
- E Aprile
- Physics Department, Columbia University, New York, New York 10027, USA
| | - J Aalbers
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - F Agostini
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - M Alfonsi
- Institut für Physik and Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - F D Amaro
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - M Anthony
- Physics Department, Columbia University, New York, New York 10027, USA
| | - F Arneodo
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - P Barrow
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - L Baudis
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - B Bauermeister
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | | | - T Berger
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - P A Breur
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - A Brown
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - A Brown
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - E Brown
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - S Bruenner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - G Bruno
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - R Budnik
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - L Bütikofer
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - J Calvén
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - J M R Cardoso
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - M Cervantes
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - D Cichon
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Coderre
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - A P Colijn
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - J Conrad
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - J P Cussonneau
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Université de Nantes, Nantes 44307, France
| | - M P Decowski
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - P de Perio
- Physics Department, Columbia University, New York, New York 10027, USA
| | - P Di Gangi
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - A Di Giovanni
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - S Diglio
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Université de Nantes, Nantes 44307, France
| | - G Eurin
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J Fei
- Department of Physics, University of California, San Diego, California 92093, USA
| | - A D Ferella
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - A Fieguth
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - W Fulgione
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- INFN-Torino and Osservatorio Astrofisico di Torino, 10125 Torino, Italy
| | - A Gallo Rosso
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - M Galloway
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - F Gao
- Physics Department, Columbia University, New York, New York 10027, USA
| | - M Garbini
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - R Gardner
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - C Geis
- Institut für Physik and Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - L W Goetzke
- Physics Department, Columbia University, New York, New York 10027, USA
| | - L Grandi
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - Z Greene
- Physics Department, Columbia University, New York, New York 10027, USA
| | - C Grignon
- Institut für Physik and Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - C Hasterok
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - E Hogenbirk
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - J Howlett
- Physics Department, Columbia University, New York, New York 10027, USA
| | - R Itay
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - B Kaminsky
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - S Kazama
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - G Kessler
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - A Kish
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - H Landsman
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - R F Lang
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - D Lellouch
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - L Levinson
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Q Lin
- Physics Department, Columbia University, New York, New York 10027, USA
| | - S Lindemann
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - M Lindner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - F Lombardi
- Department of Physics, University of California, San Diego, California 92093, USA
| | - J A M Lopes
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - A Manfredini
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - I Mariş
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | | | - J Masbou
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Université de Nantes, Nantes 44307, France
| | - F V Massoli
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - D Masson
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - D Mayani
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - M Messina
- Physics Department, Columbia University, New York, New York 10027, USA
| | - K Micheneau
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Université de Nantes, Nantes 44307, France
| | - A Molinario
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - K Morå
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - M Murra
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - J Naganoma
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - K Ni
- Department of Physics, University of California, San Diego, California 92093, USA
| | - U Oberlack
- Institut für Physik and Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - P Pakarha
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - B Pelssers
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - R Persiani
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Université de Nantes, Nantes 44307, France
| | - F Piastra
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - J Pienaar
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - V Pizzella
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M-C Piro
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - G Plante
- Physics Department, Columbia University, New York, New York 10027, USA
| | - N Priel
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - L Rauch
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - S Reichard
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - C Reuter
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - B Riedel
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - A Rizzo
- Physics Department, Columbia University, New York, New York 10027, USA
| | - S Rosendahl
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - N Rupp
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - R Saldanha
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - J M F Dos Santos
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - G Sartorelli
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - M Scheibelhut
- Institut für Physik and Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - S Schindler
- Institut für Physik and Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - J Schreiner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Schumann
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - L Scotto Lavina
- LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris 75252, France
| | - M Selvi
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - P Shagin
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - E Shockley
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - M Silva
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - H Simgen
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M V Sivers
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - A Stein
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - S Thapa
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - D Thers
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Université de Nantes, Nantes 44307, France
| | - A Tiseni
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - G Trinchero
- INFN-Torino and Osservatorio Astrofisico di Torino, 10125 Torino, Italy
| | - C Tunnell
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - M Vargas
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - N Upole
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - H Wang
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - Z Wang
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - Y Wei
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - C Weinheimer
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - J Wulf
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - J Ye
- Department of Physics, University of California, San Diego, California 92093, USA
| | - Y Zhang
- Physics Department, Columbia University, New York, New York 10027, USA
| | - T Zhu
- Physics Department, Columbia University, New York, New York 10027, USA
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Hovland J, Kessler G. Elementary Teachers’ Technology Integration Self-Efficacy for Teaching Nutrition. J Acad Nutr Diet 2017. [DOI: 10.1016/j.jand.2017.06.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Affiliation(s)
- G. Kessler
- Technical University of Karlsruhe, Institute for Pulsed Power and Microwave Technology (IHM) Karlsruhe, Germany
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Affiliation(s)
- C. H. M. Broeders
- Research Center Karlsruhe, Institute for Reactor Safety Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - G. Kessler
- Research Center Karlsruhe Director Emeritus of the former Institute for Neutron Physics and Reactor Technology Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Kessler G. Proliferation Resistance of Americium Originating from Spent Irradiated Reactor Fuel of Pressurized Water Reactors, Fast Reactors, and Accelerator-Driven Systems with Different Fuel Cycle Options. NUCL SCI ENG 2017. [DOI: 10.13182/nse159-56] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- G. Kessler
- Institute for Pulsed Power and Microwave Technology Technical University of Karlsruhe 76128 Karlsruhe, Germany
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Aprile E, Aalbers J, Agostini F, Alfonsi M, Amaro FD, Anthony M, Arneodo F, Barrow P, Baudis L, Bauermeister B, Benabderrahmane ML, Berger T, Breur PA, Brown A, Brown E, Bruenner S, Bruno G, Budnik R, Bütikofer L, Calvén J, Cardoso JMR, Cervantes M, Cichon D, Coderre D, Colijn AP, Conrad J, Cussonneau JP, Decowski MP, de Perio P, Di Gangi P, Di Giovanni A, Diglio S, Eurin G, Fei J, Ferella AD, Fieguth A, Franco D, Fulgione W, Gallo Rosso A, Galloway M, Gao F, Garbini M, Geis C, Goetzke LW, Greene Z, Grignon C, Hasterok C, Hogenbirk E, Itay R, Kaminsky B, Kessler G, Kish A, Landsman H, Lang RF, Lellouch D, Levinson L, Lin Q, Lindemann S, Lindner M, Lopes JAM, Manfredini A, Maris I, Marrodán Undagoitia T, Masbou J, Massoli FV, Masson D, Mayani D, Messina M, Micheneau K, Miguez B, Molinario A, Murra M, Naganoma J, Ni K, Oberlack U, Pakarha P, Pelssers B, Persiani R, Piastra F, Pienaar J, Pizzella V, Piro MC, Plante G, Priel N, Rauch L, Reichard S, Reuter C, Rizzo A, Rosendahl S, Rupp N, Dos Santos JMF, Sartorelli G, Scheibelhut M, Schindler S, Schreiner J, Schumann M, Scotto Lavina L, Selvi M, Shagin P, Silva M, Simgen H, Sivers MV, Stein A, Thers D, Tiseni A, Trinchero G, Tunnell C, Wang H, Wei Y, Weinheimer C, Wulf J, Ye J, Zhang Y. Search for Electronic Recoil Event Rate Modulation with 4 Years of XENON100 Data. Phys Rev Lett 2017; 118:101101. [PMID: 28339273 DOI: 10.1103/physrevlett.118.101101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Indexed: 06/06/2023]
Abstract
We report on a search for electronic recoil event rate modulation signatures in the XENON100 data accumulated over a period of 4 yr, from January 2010 to January 2014. A profile likelihood method, which incorporates the stability of the XENON100 detector and the known electronic recoil background model, is used to quantify the significance of periodicity in the time distribution of events. There is a weak modulation signature at a period of 431_{-14}^{+16} day in the low energy region of (2.0-5.8) keV in the single scatter event sample, with a global significance of 1.9σ; however, no other more significant modulation is observed. The significance of an annual modulation signature drops from 2.8σ, from a previous analysis of a subset of this data, to 1.8σ with all data combined. Single scatter events in the low energy region are thus used to exclude the DAMA/LIBRA annual modulation as being due to dark matter electron interactions via axial vector coupling at 5.7σ.
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Affiliation(s)
- E Aprile
- Physics Department, Columbia University, New York, New York 10027, USA
| | - J Aalbers
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
| | - F Agostini
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - M Alfonsi
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - F D Amaro
- Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - M Anthony
- Physics Department, Columbia University, New York, New York 10027, USA
| | - F Arneodo
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - P Barrow
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - L Baudis
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - B Bauermeister
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | | | - T Berger
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - P A Breur
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
| | - A Brown
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
| | - E Brown
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - S Bruenner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - G Bruno
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - R Budnik
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - L Bütikofer
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - J Calvén
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - J M R Cardoso
- Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - M Cervantes
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - D Cichon
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Coderre
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - A P Colijn
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
| | - J Conrad
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - J P Cussonneau
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - M P Decowski
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
| | - P de Perio
- Physics Department, Columbia University, New York, New York 10027, USA
| | - P Di Gangi
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - A Di Giovanni
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - S Diglio
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - G Eurin
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J Fei
- Department of Physics, University of California, San Diego, California 92093, USA
| | - A D Ferella
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - A Fieguth
- Institut für Kernphysik, Wilhelms-Universität Münster, 48149 Münster, Germany
| | - D Franco
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - W Fulgione
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- INFN-Torino and Osservatorio Astrofisico di Torino, 10125 Torino, Italy
| | - A Gallo Rosso
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - M Galloway
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - F Gao
- Physics Department, Columbia University, New York, New York 10027, USA
| | - M Garbini
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - C Geis
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - L W Goetzke
- Physics Department, Columbia University, New York, New York 10027, USA
| | - Z Greene
- Physics Department, Columbia University, New York, New York 10027, USA
| | - C Grignon
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - C Hasterok
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - E Hogenbirk
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
| | - R Itay
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - B Kaminsky
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - G Kessler
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - A Kish
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - H Landsman
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - R F Lang
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - D Lellouch
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - L Levinson
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Q Lin
- Physics Department, Columbia University, New York, New York 10027, USA
| | - S Lindemann
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Lindner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J A M Lopes
- Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - A Manfredini
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - I Maris
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | | | - J Masbou
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - F V Massoli
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - D Masson
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - D Mayani
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - M Messina
- Physics Department, Columbia University, New York, New York 10027, USA
| | - K Micheneau
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - B Miguez
- INFN-Torino and Osservatorio Astrofisico di Torino, 10125 Torino, Italy
| | - A Molinario
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - M Murra
- Institut für Kernphysik, Wilhelms-Universität Münster, 48149 Münster, Germany
| | - J Naganoma
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - K Ni
- Department of Physics, University of California, San Diego, California 92093, USA
| | - U Oberlack
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - P Pakarha
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - B Pelssers
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - R Persiani
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - F Piastra
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - J Pienaar
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - V Pizzella
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M-C Piro
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - G Plante
- Physics Department, Columbia University, New York, New York 10027, USA
| | - N Priel
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - L Rauch
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - S Reichard
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - C Reuter
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - A Rizzo
- Physics Department, Columbia University, New York, New York 10027, USA
| | - S Rosendahl
- Institut für Kernphysik, Wilhelms-Universität Münster, 48149 Münster, Germany
| | - N Rupp
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J M F Dos Santos
- Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - G Sartorelli
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - M Scheibelhut
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - S Schindler
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - J Schreiner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Schumann
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - L Scotto Lavina
- LPNHE, Universit Pierre et Marie Curie, Universit Paris Diderot, CNRS/IN2P3, Paris 75252, France
| | - M Selvi
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - P Shagin
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - M Silva
- Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - H Simgen
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M V Sivers
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - A Stein
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - D Thers
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - A Tiseni
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
| | - G Trinchero
- INFN-Torino and Osservatorio Astrofisico di Torino, 10125 Torino, Italy
| | - C Tunnell
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, The Netherlands
- Department of Physics & Kavli Institute of Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - H Wang
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - Y Wei
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - C Weinheimer
- Institut für Kernphysik, Wilhelms-Universität Münster, 48149 Münster, Germany
| | - J Wulf
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - J Ye
- Department of Physics, University of California, San Diego, California 92093, USA
| | - Y Zhang
- Physics Department, Columbia University, New York, New York 10027, USA
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8
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Aprile E, Aalbers J, Agostini F, Alfonsi M, Anthony M, Arazi L, Arisaka K, Arneodo F, Balan C, Barrow P, Baudis L, Bauermeister B, Breur PA, Brown A, Brown E, Bruenner S, Bruno G, Budnik R, Bütikofer L, Cardoso JMR, Cervantes M, Coderre D, Colijn AP, Contreras H, Cussonneau JP, Decowski MP, de Perio P, Di Giovanni A, Duchovni E, Fattori S, Ferella AD, Fieguth A, Fulgione W, Gao F, Garbini M, Geis C, Goetzke LW, Grignon C, Gross E, Hampel W, Hasterok C, Itay R, Kaether F, Kaminsky B, Kessler G, Kish A, Landsman H, Lang RF, Le Calloch M, Lellouch D, Levinson L, Levy C, Lindemann S, Lindner M, Lopes JAM, Lyashenko A, Macmullin S, Marrodán Undagoitia T, Masbou J, Massoli FV, Mayani D, Melgarejo Fernandez AJ, Meng Y, Messina M, Micheneau K, Miguez B, Molinario A, Murra M, Naganoma J, Ni K, Oberlack U, Orrigo SEA, Pakarha P, Persiani R, Piastra F, Pienaar J, Plante G, Priel N, Rauch L, Reichard S, Reuter C, Rizzo A, Rosendahl S, Dos Santos JMF, Sartorelli G, Schindler S, Schreiner J, Schumann M, Scotto Lavina L, Selvi M, Shagin P, Simgen H, Teymourian A, Thers D, Tiseni A, Trinchero G, Tunnell C, Wall R, Wang H, Weber M, Weinheimer C, Zhang Y. Search for Event Rate Modulation in XENON100 Electronic Recoil Data. Phys Rev Lett 2015; 115:091302. [PMID: 26371638 DOI: 10.1103/physrevlett.115.091302] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Indexed: 06/05/2023]
Abstract
We have searched for periodic variations of the electronic recoil event rate in the (2-6) keV energy range recorded between February 2011 and March 2012 with the XENON100 detector, adding up to 224.6 live days in total. Following a detailed study to establish the stability of the detector and its background contributions during this run, we performed an unbinned profile likelihood analysis to identify any periodicity up to 500 days. We find a global significance of less than 1σ for all periods, suggesting no statistically significant modulation in the data. While the local significance for an annual modulation is 2.8σ, the analysis of a multiple-scatter control sample and the phase of the modulation disfavor a dark matter interpretation. The DAMA/LIBRA annual modulation interpreted as a dark matter signature with axial-vector coupling of weakly interacting massive particles to electrons is excluded at 4.8σ.
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Affiliation(s)
- E Aprile
- Physics Department, Columbia University, New York, New York 10027, USA
| | - J Aalbers
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - F Agostini
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - M Alfonsi
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - M Anthony
- Physics Department, Columbia University, New York, New York 10027, USA
| | - L Arazi
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - K Arisaka
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - F Arneodo
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - C Balan
- Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal
| | - P Barrow
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - L Baudis
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - B Bauermeister
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - P A Breur
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - A Brown
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - E Brown
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - S Bruenner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - G Bruno
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - R Budnik
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - L Bütikofer
- Albert Einstein Center for Fundamental Physics, University of Bern, 3012 Bern, Switzerland
| | - J M R Cardoso
- Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal
| | - M Cervantes
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - D Coderre
- Albert Einstein Center for Fundamental Physics, University of Bern, 3012 Bern, Switzerland
| | - A P Colijn
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - H Contreras
- Physics Department, Columbia University, New York, New York 10027, USA
| | - J P Cussonneau
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - M P Decowski
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - P de Perio
- Physics Department, Columbia University, New York, New York 10027, USA
| | - A Di Giovanni
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - E Duchovni
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - S Fattori
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - A D Ferella
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - A Fieguth
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - W Fulgione
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - F Gao
- Department of Physics & Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - M Garbini
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - C Geis
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - L W Goetzke
- Physics Department, Columbia University, New York, New York 10027, USA
| | - C Grignon
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - E Gross
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - W Hampel
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - C Hasterok
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - R Itay
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - F Kaether
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - B Kaminsky
- Albert Einstein Center for Fundamental Physics, University of Bern, 3012 Bern, Switzerland
| | - G Kessler
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - A Kish
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - H Landsman
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - R F Lang
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - M Le Calloch
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - D Lellouch
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - L Levinson
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - C Levy
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - S Lindemann
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Lindner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J A M Lopes
- Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal
| | - A Lyashenko
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - S Macmullin
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | | | - J Masbou
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - F V Massoli
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - D Mayani
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | | | - Y Meng
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - M Messina
- Physics Department, Columbia University, New York, New York 10027, USA
| | - K Micheneau
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - B Miguez
- INFN-Torino and Osservatorio Astrofisico di Torino, 10125 Torino, Italy
| | - A Molinario
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - M Murra
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - J Naganoma
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - K Ni
- Department of Physics & Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - U Oberlack
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - S E A Orrigo
- Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal
| | - P Pakarha
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - R Persiani
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - F Piastra
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - J Pienaar
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - G Plante
- Physics Department, Columbia University, New York, New York 10027, USA
| | - N Priel
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - L Rauch
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - S Reichard
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - C Reuter
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - A Rizzo
- Physics Department, Columbia University, New York, New York 10027, USA
| | - S Rosendahl
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - J M F Dos Santos
- Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal
| | - G Sartorelli
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - S Schindler
- Institut für Physik & Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - J Schreiner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Schumann
- Albert Einstein Center for Fundamental Physics, University of Bern, 3012 Bern, Switzerland
| | - L Scotto Lavina
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - M Selvi
- Department of Physics and Astrophysics, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - P Shagin
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - H Simgen
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - A Teymourian
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - D Thers
- SUBATECH, Ecole des Mines de Nantes, CNRS/In2p3, Université de Nantes, Nantes 44307, France
| | - A Tiseni
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - G Trinchero
- INFN-Torino and Osservatorio Astrofisico di Torino, 10125 Torino, Italy
| | - C Tunnell
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - R Wall
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - H Wang
- Physics & Astronomy Department, University of California, Los Angeles, California 90095, USA
| | - M Weber
- Physics Department, Columbia University, New York, New York 10027, USA
| | - C Weinheimer
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Y Zhang
- Physics Department, Columbia University, New York, New York 10027, USA
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Wirbel R, Kessler G, Lommel D. [Multicentric osseous giant cell tumor]. ROFO-FORTSCHR RONTG 2014; 186:508-10. [PMID: 24407710 DOI: 10.1055/s-0033-1356036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Rineiski A, Kessler G. Proliferation-resistant fuel options for thermal and fast reactors avoiding neptunium production. Nuclear Engineering and Design 2010. [DOI: 10.1016/j.nucengdes.2009.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kessler G. Steady state and transient temperature profiles in a multishell spherical system heated internally by reactor-grade plutonium. Nuclear Engineering and Design 2009. [DOI: 10.1016/j.nucengdes.2009.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sieder R, Kraft D, Schilling B, Kessler G, Grünes G, Kurz R. Rechnergestützte Blutdruckregelung nach Herzoperationen. BIOMED ENG-BIOMED TE 2009. [DOI: 10.1515/bmte.1988.33.s2.73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kessler G, Schöntag G, Eisenhart-Rothe B. Aminosäurespiegel-Untersuchungen an Blutkonserven. Transfus Med Hemother 2009. [DOI: 10.1159/000221209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Kessler G, Höbel W, Goel B, Seifritz W. Potential nuclear explosive yield of reactor-grade plutonium using the disassembly theory of early reactor safety analysis. Nuclear Engineering and Design 2008. [DOI: 10.1016/j.nucengdes.2008.08.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kessler G. Requirements for nuclear energy in the 21st century nuclear energy as a sustainable energy source. Progress in Nuclear Energy 2002. [DOI: 10.1016/s0149-1970(02)00024-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Giulivi A, Slinger R, Tepper M, Sher G, Scalia V, Kessler G, Gill P. Prevalence of GBV-C/hepatitis G virus viremia and anti-E2 in Canadian blood donors. Vox Sang 2001; 79:201-5. [PMID: 11155070 DOI: 10.1159/000056731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND OBJECTIVES GB virus C (GBV-C)/hepatitis G virus (HGV) is a recently recognized parenterally and sexually transmitted agent. The prevalence of GBV-C/HGV markers in Canadian blood donors has not been previously studied and was therefore determined. MATERIALS AND METHODS Blood donors [identity unlinked (IU), short-term temporarily deferred (STTD) and autologous groups] and donor samples with antibodies to hepatitis C (anti-HCV) or hepatitis B core were tested for GBV-C/HGV RNA and for antibodies to E2 antigen (anti-E2). RESULTS GBV-C/HGV RNA was found in 1.1% and anti-E2 in 7.3% of the combined IU/STTD donor group. Viremia was much more common in anti-HCV-positive samples (12.5%); anti-E2 was present in >50% of this group. In the STTD group, female gender was significantly associated with viremia. CONCLUSION GBV-C/HGV infection is relatively common in Canadian donors, and a small proportion are viremic. The association of female gender and viremia was unexpected. Further study is needed to clarify the epidemiology and natural history of GBV-C/HGV infection.
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Affiliation(s)
- A Giulivi
- Division of Bloodborne Pathogens, Laboratory Centre for Disease Control, Health Canada, Ottawa, Canada
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17
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Abstract
BACKGROUND AND OBJECTIVES GB virus C (GBV-C)/hepatitis G virus (HGV) is a recently recognized parenterally and sexually transmitted agent. The prevalence of GBV-C/HGV markers in Canadian blood donors has not been previously studied and was therefore determined. MATERIALS AND METHODS Blood donors [identity unlinked (IU), short-term temporarily deferred (STTD) and autologous groups] and donor samples with antibodies to hepatitis C (anti-HCV) or hepatitis B core were tested for GBV-C/HGV RNA and for antibodies to E2 antigen (anti-E2). RESULTS GBV-C/HGV RNA was found in 1.1% and anti-E2 in 7.3% of the combined IU/STTD donor group. Viremia was much more common in anti-HCV-positive samples (12.5%); anti-E2 was present in >50% of this group. In the STTD group, female gender was significantly associated with viremia. CONCLUSION GBV-C/HGV infection is relatively common in Canadian donors, and a small proportion are viremic. The association of female gender and viremia was unexpected. Further study is needed to clarify the epidemiology and natural history of GBV-C/HGV infection.
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Affiliation(s)
- A Giulivi
- Division of Bloodborne Pathogens, Laboratory Centre for Disease Control, Health Canada, Ottawa, Canada
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18
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Akçetin Z, Pregla R, Busch A, Kessler G, Heynemann H, Holtz J, Brömme H. Lipid peroxidation and the expressional regulation of the heat-shock response during ischemia-reperfusion of rat kidney. Urol Int 2001; 65:32-9. [PMID: 10965299 DOI: 10.1159/000064831] [Citation(s) in RCA: 13] [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: 11/19/2022]
Abstract
Because of the continuing shortage of donor organs, 'marginal kidneys' are increasingly being used. The purpose of our experiments was to characterize the extent of lipid peroxidation after ischemia-reperfusion (IR) injury in rat kidney, to analyze the expressional regulation of the heat-shock response and now to discuss the clinical application of these results. After ischemia, xanthine oxidase (XO) is thought to be the main oxygen radical-generating system and malondialdehyde (MDA) is considered to be a marker of LPO. In young rats (10 weeks) a unilateral warm ischemia of 40 and 60 min duration with subsequent reperfusion up to 1 h was conducted. Beside the 'footprints' of oxidative stress, the cytosolic antioxidative capacity, expressed as superoxide anion (SOA) scavenging capacity, was investigated. There was only a moderate and transient increase of renal MDA 5 and 10 min after the onset of reoxygenation (133.57/70.67 and 97.84/91.57 vs. 49.47 nmol/g wet weight (ww) in preischemic controls). ATP breakdown (to 83/65 from 2,947 nmol/g ww) with consecutive accumulation of hypoxanthine (up to 1,105 nmol/g ww) at the end of the ischemic period and the subsequent rapid decline of hypoxanthine by XO during reperfusion were used for an assessment of the SOA-generating capacity of these kidneys. Only 1/25-1/50 of the kidney cytosol was able to scavenge the whole amount of SOA generated by the total XO activity of rat kidney. Thus, it could be analytically and stoichiometrically shown that after IR there is only a moderate oxidative stress in kidneys of young rats; this is due to their high SOA-scavenging capacity compared to their SOA-generating ability. We investigated the time course of HSP70-1 and -2 mRNA expression and its relation to cellular ATP levels in renal cortex after different periods of unilateral warm renal ischemia (10-60 min) and reperfusion (up to 60 min) in 10-week-old male Wistar rats, since IR is known to cause induction of both genes. Immediately after ischemia there was a significant induction of both HSP70i genes. While HSP70-1 expression constantly increased (up to 4-fold) during reperfusion, even to a higher extent with prolongation of ischemia, HSP70-2 mRNA - generally being expressed on a far lower level than HSP70-1 mRNA - was strongly induced (3-fold) during reperfusion only after brief periods (10 min) of ischemia. Cellular ATP levels rapidly dropped down to 5% with ischemia and the pattern of recovery during reperfusion significantly depended on the duration of the ischemic period thus showing a good relation to the heat-shock (protein) gene expression. We conclude that the HSP70-2 is the more sensitive gene with a lower threshold activation by mild injury, while the HSP70-1 gene mediates the big response of HSP induction after severe injury. Thus, the measurement of the cytosolic antioxidative capacity and the differential expression of HSP70-1 and -2 mRNA could be promising clinical tools to assess the donor viability.
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Affiliation(s)
- Z Akçetin
- Department of Urology, Friedrich Alexander University, Erlangen, Germany
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19
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Kessler G. The passport system and state control over population flows in the Soviet Union, 1932-1940. Cah Monde Russe 2001; 42:477-503. [PMID: 20020566 DOI: 10.4000/monderusse.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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20
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Kessler G. The 1932-1933 crisis and its aftermath beyond the epicenters of famine: the Urals region. Harv Ukr Stud 2001; 25:253-265. [PMID: 20034144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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21
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Wang CK, Zino JF, Kessler G. Enhancement of a 252Cf-based neutron beam via subcritical multiplication for neutron capture therapy. Appl Radiat Isot 2000; 53:811-4. [PMID: 11003524 DOI: 10.1016/s0969-8043(00)00237-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Previous studies indicated that an epithermal-neutron beam based on bare 252Cf is not feasible for neutron capture therapy (NCT). It was reported that a clinically useful epithermal-neutron beam requires a minimum of 1.0 g of 252Cf, which is more than twice the US current annual supply. However, it was reasoned that the required quantity of 252Cf could be dramatically reduced when used with a subcritical multiplying assembly (SMA). This reasoning is based on the assumption that the epithermal-neutron beam intensity for NCT is directly proportional to the fission neutron population, and that the neutron multiplying factor of the SMA can be estimated by 1/(1 - k(eff)). We have performed detailed Monte Carlo calculations to investigate the validity of the above reasoning. Our results show that 1/(1 - k(eff)) grossly overestimates the beam enhancement factor for NCT. For example, Monte Carlo calculations predict a beam enhancement factor of 6.0 for an optimized SMA geometry with k(eff) = 0.968. This factor is much less than 31 predicted by 1/(1 - k(eff)). The overestimation is due to the fact that most of the neutrons produced in the SMA are self-shielded, whereas self-shielding is negligible in a bare 252Cf source. Since the beam intensity of a 0.1 g 252Cf with the optimized SMA enhancement is still more than an order of magnitude too low compared to the existing reactor beams, we conclude that the enhancement via an SMA for a 252Cf-based epithermal-neutron beam is inadequate for NCT.
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Affiliation(s)
- C K Wang
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332-0225, USA.
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22
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Hu YW, Balaskas E, Furione M, Yen PH, Kessler G, Scalia V, Chui L, Sher G. Comparison and application of a novel genotyping method, semiautomated primer-specific and mispair extension analysis, and four other genotyping assays for detection of hepatitis C virus mixed-genotype infections. J Clin Microbiol 2000; 38:2807-13. [PMID: 10921931 PMCID: PMC87116 DOI: 10.1128/jcm.38.8.2807-2813.2000] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To date the true prevalence of hepatitis C virus (HCV) mixed-genotype infections has not been established mainly because currently available methods are not suitable for the detection of mixed genotypes in a viral population. A novel semiautomated genotyping method, primer-specific and mispair extension analysis (S-PSMEA), which is more reliable than other genotyping assays was developed for detection of HCV mixed-genotype infections. A genotype present at levels as low as 0.8% in a defined mix of HCV genotypes was detected, showing a 20-fold increase in sensitivity over that of direct DNA sequencing. A total of 434 HCV isolates were genotyped and analyzed for a comparative study of the accuracy between S-PSMEA and four current genotyping methods. The results showed that viruses in approximately 40% of the samples from this group determined to be infected with mixed genotypes by S-PSMEA were undetected by direct DNA sequencing due to its low sensitivity. Type-specific PCR, line probe assay, and restriction fragment length polymorphism analysis performed poorly, being able to identify only 38.5, 16.1, and 15.4% of mixed-genotype infections, respectively, that were detected by direct DNA sequencing. The prevalence of mixed-genotype infections detected by S-PSMEA was 7.9% (12 of 152 donors) among HCV-infected blood donors, 14.3% (15 of 105) among patients with chronic hepatitis C, and 17.1% (6 of 36) among thalassemia patients who had received multiple transfusions. The data lead us to conclude that HCV mixed-genotype infections are more common than previously estimated and that S-PSMEA may be the method of choice when detection of genotypes present at low levels in mixed-genotype infections is required due to its higher level of sensitivity.
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Affiliation(s)
- Y W Hu
- Canadian Blood Services, Ottawa, Ontario, Canada K1G 4J5.
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23
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Akçetin Z, Busch A, Kessler G, Heynemann H, Holtz J, Brömme HJ. Evidence for only a moderate lipid peroxidation during ischemia-reperfusion of rat kidney due to its high antioxidative capacity. Urol Res 1999; 27:280-4. [PMID: 10460900 DOI: 10.1007/s002400050124] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The extent of lipid peroxidation after ischemia-reperfusion (I-R) injury in rat kidney has been controversial. After I, xanthine oxidase (XO) is thought to be the main oxygen radical-generating system and malondialdehyde (MDA) is considered to be a marker of lipid peroxidation (LPO). In young rats (10 weeks old) a unilateral warm I of 40 and 60 min duration with subsequent R up to 1 h was conducted. Beside the "footprints" of oxidative stress, the cytosolic antioxidative capacity, expressed as superoxide anion (SOA) scavenging capacity, and the renal catalase were also investigated. There was only a moderate and transient increase of renal MDA 5 and 10 min after the onset of reoxygenation (133.57/70. 67 and 97.84/91.57 vs. 49.47 nmol/g ww in preischemic controls). ATP breakdown (to 83/65 from 2947 nmol/g ww) with consecutive accumulation of hypoxanthine (up to 1105 nmol/g ww) at the end of ischemic period and the subsequent rapid decline of hypoxanthine by XO during reperfusion were used for an assessment of the SOA-generating capacity of these kidneys. Superoxide dismutase (SOD) activity, glutathione (GSH) and the high activity of catalase (18000 U/g ww) remained nearly unchanged during R. Only 1/25-1/50 of the kidney cytosol was able to scavenge the whole amount of SOA generated by the total XO activity of rat kidney. Thus, it could be analytically and stoichiometrically shown that after IR there is only a moderate oxidative stress in kidneys of young rats; this is due to their high SOA-scavenging capacity compared with their SOA-generating ability.
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Affiliation(s)
- Z Akçetin
- Department of Urology, University of Halle-Wittenberg, Magdeburger Strasse 16, D-06097 Halle, Germany
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24
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Abstract
Chronic viral infection has been implicated in the pathogenesis of B-cell lymphoma, and hepatitis C virus (HCV) infects lymphocytes. Chronic infection with HCV may result in B-cell proliferation. Individuals infected with hepatitis C are often co-infected with the RNA virus GB virus type C. Studies from Europe where hepatitis C infection is more common than in North America have shown a high prevalence of hepatitis C infection in patients with B-cell lymphoma. The aim of this study was to establish the prevalence of HCV and GBV-C infection in patients with B-cell lymphoma in an area of low HCV prevalence. One hundred patients with B-cell lymphoma (10 high grade, 46 intermediate grade, and 44 low grade) and 100 controls with nonhematological malignancies were studied. Serum was analyzed for HCV antibodies by third generation enzyme-linked immunosorbant assay, and HCV RNA and GBV-C RNA was analyzed by reverse transcriptase PCR. None of the controls or lymphoma patients had antibodies to HCV. HCV RNA was undetected in 60 out of 100 lymphoma patients tested. GBV-C RNA was detected in the serum of 5 out of 100 (5%) of lymphoma patients and in 3 out of 100 (3%) controls. Hepatitis C and GBV-C are, therefore, unlikely to play a major role in the pathogenesis of B-cell lymphoma in North America.
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Affiliation(s)
- J D Collier
- Department of Medicine, Princess Margaret Hospital, Toronto, Canada
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25
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Hu YW, Balaskas E, Kessler G, Issid C, Scully LJ, Murphy DG, Rinfret A, Giulivi A, Scalia V, Gill P. Primer specific and mispair extension analysis (PSMEA) as a simple approach to fast genotyping. Nucleic Acids Res 1998; 26:5013-5. [PMID: 9776770 PMCID: PMC147926 DOI: 10.1093/nar/26.21.5013] [Citation(s) in RCA: 24] [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] [Indexed: 11/12/2022] Open
Abstract
A simple method, primer specific and mispair extension analysis (PSMEA) with pfu DNA polymerase was developed for genotyping. PSMEA is based on the unique properties of 3'-->5' exonuclease proofreading activity. In the presence of an incomplete set of dNTPs, pfu was found to be extremely discriminative in nucleotide incorporation and proofreading at the initiation step of DNA synthesis, completely preventing primer extension when mispair(s) are found adjacent to the 3'-end of the primer. This has allowed us to accurately detect nucleotide variations, deletions and insertions for fast genotyping.
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Affiliation(s)
- Y W Hu
- The Canadian Red Cross Society, Ottawa, Ontario K1G 4J5, Canada, Laboratoire de Santé Publique du Québec, Ste-Anne-de-Bellevue, Quebéc H9X 3R5, Canada.
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26
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Kessler G, Friedman J. Metabolism of fatty acids and glucose. Circulation 1998; 98:1351. [PMID: 9751689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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27
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Wilhelm S, Standl T, Burmeister M, Kessler G, Schulte am Esch J. Comparison of continuous spinal with combined spinal-epidural anesthesia using plain bupivacaine 0.5% in trauma patients. Anesth Analg 1997; 85:69-74. [PMID: 9212125 DOI: 10.1097/00000539-199707000-00013] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We investigated the efficacy and complications of microcatheter spinal anesthesia (CSA) in comparison to a combined spinal-epidural technique (CSE) using plain bupivacaine 0.5%. Sixty trauma patients randomly received either CSA using a 22-gauge Sprotte needle and a 28-gauge microcatheter or CSE after insertion of a 22-gauge epidural catheter through an 18-gauge Tuohy needle followed by dural puncture with a 25-gauge pencil-point needle inserted through the backeye of the Tuohy needle. An initial subarachnoid bolus of 2 mL of plain bupivacaine 0.5% was injected. If analgesia did not reach T12 within 20 min, supplemental bupivacaine was injected either intrathecally or epidurally up to a maximum of 5 mL in the CSA group or 16 mL in the CSE group. Mean arterial blood pressure, heart rate, and analgesic levels were recorded. On postoperative Day 4, patients were interviewed for postanesthetic complaints. Technical problems were more frequent in the CSE group than in the CSA group (47% vs 13%). Performance of anesthesia was faster (8 +/- 3 vs 15 +/- 8 min) and the total dose of bupivacaine lower (3.2 +/- 1.0 vs 9.7 +/- 5 mL) in patients who received CSA. The incidence of hypotension did not differ significantly. However, more patients in the CSE group were treated for bradycardia (4 vs 0). The number of patients suffering from postdural puncture headache was comparable in both groups, but there were more patients with lower back pain in the CSE group (8 vs 2). In conclusion, our data suggest that microcatheter CSA is not associated with an increased rate of complication in patients with lower limb fractures.
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Affiliation(s)
- S Wilhelm
- Department of Anesthesiology, University Hospital Eppendorf, Hamburg, Germany
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28
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Affiliation(s)
- G Kessler
- Maccabi Heart Institute, Ramat Gan, Israel
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29
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Brandes A, Bschorer R, Gehrke G, Kessler G, Schmelzle R. [Life-threatening swelling of the tongue in antihypertensive therapy with ACE inhibitors]. Mund Kiefer Gesichtschir 1997; 1:68-70. [PMID: 9483934 DOI: 10.1007/bf03043513] [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: 02/06/2023]
Abstract
Although generally showing a low incidence of side effects, inhibitors of angiotensin-converting enzyme (ACE) may in rare cases induce angioedemas, mainly located in the oro-facial area and larynx. The interval between the beginning of the ACE inhibitor therapy and the occurrence of such angioedemas may range from a few hours to a few years. Here, the case of a 53-year-old man with massive swelling of the tongue after dental surgery is presented who had started with ACE inhibitor therapy only 24 h before. At admission to the clinic, obstruction of the upper airway due to the tongue swelling had already progressed so far that fiberoptic intubation was necessary. Additionally, the patient was treated with corticosteroids, antihistaminics and epinephrine, avoiding any further administration of the ACE inhibitor. The swelling resolved within 48-72 h. Dentists and physicians should take into consideration this potential side effect in patients treated with ACE inhibitors.
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Affiliation(s)
- A Brandes
- Klinik für Mund-, Kiefer- und Gesichtschirurgie, Universitätskrankenhaus Eppendorf
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30
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Lo SF, Nahm MH, Parvin CA, Kessler G. Singleton vs duplicate prostate-specific antigen measurements. Clin Chem 1995; 41:1535-7. [PMID: 7586532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- S F Lo
- Dept. of Pathol. and Med., Washington Univ. Sch. of Med., St. Louis, MO 63110, USA
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31
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Affiliation(s)
- S F Lo
- Dept. of Pathol. and Med., Washington Univ. Sch. of Med., St. Louis, MO 63110, USA
| | - M H Nahm
- Dept. of Pathol. and Med., Washington Univ. Sch. of Med., St. Louis, MO 63110, USA
| | - C A Parvin
- Dept. of Pathol. and Med., Washington Univ. Sch. of Med., St. Louis, MO 63110, USA
| | - G Kessler
- Dept. of Pathol. and Med., Washington Univ. Sch. of Med., St. Louis, MO 63110, USA
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32
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Wood PD, Kessler G, Lippel K, Stefanick ML, Wasilauskas CH, Wells HB. Physical and laboratory measurements in the PEPI Trial Postmenopausal Estrogen/Progestin Interventions. Control Clin Trials 1995; 16:36S-53S. [PMID: 7587219 DOI: 10.1016/0197-2456(95)96882-c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- P D Wood
- Stanford University, Stanford Center for Research in Disease Prevention, Palo Alto, CA, USA
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33
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Kessler G. Doing the right thing: stop worrying about cholesterol. Circulation 1994; 90:2573. [PMID: 7832875 DOI: 10.1161/01.cir.90.5.2573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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34
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Pechen EV, Krasnosvobodtsev SI, Kessler G, Richter A, Panzner M, Grossmann O, Teresiak A. Two-beam laser deposition process for Y1Ba2Cu3O7−x films on silicon. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/pssa.2211310129] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Kessler G. Editor’s Comments. NUCL TECHNOL 1992. [DOI: 10.13182/nt92-a34610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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36
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Parvin CA, Gray DL, Kessler G. Influence of assay method differences on multiple of the median distributions: maternal serum alpha-fetoprotein as an example. Clin Chem 1991; 37:637-42. [PMID: 1709595] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A straightforward statistical explanation is provided to show how differences between assay methods can affect the distribution of the multiples of the median (MoM). Evaluation of the impact of assay method differences reveals that the upper tails of the MoM distribution are not affected to the same degree as the lower tails of the distribution. The disparities in MoM distributions due to assay method differences result in various sensitivity/specificity combinations for different assays having the same fixed MoM cutoffs. Disparities do not exist if risks are calculated with use of the distributions for affected and unaffected populations that are based on a center's own assay method. Applying published risk tables, however, can affect the accuracy of the risk estimates. We used maternal serum alpha-fetoprotein as an example of an assay with an established history of reporting results in MoM values; however, the concepts presented apply equally well to any assay for which results are reported in MoMs.
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Affiliation(s)
- C A Parvin
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
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37
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Parvin CA, Gray DL, Kessler G. Influence of assay method differences on multiple of the median distributions: maternal serum alpha-fetoprotein as an example. Clin Chem 1991. [DOI: 10.1093/clinchem/37.5.637] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
A straightforward statistical explanation is provided to show how differences between assay methods can affect the distribution of the multiples of the median (MoM). Evaluation of the impact of assay method differences reveals that the upper tails of the MoM distribution are not affected to the same degree as the lower tails of the distribution. The disparities in MoM distributions due to assay method differences result in various sensitivity/specificity combinations for different assays having the same fixed MoM cutoffs. Disparities do not exist if risks are calculated with use of the distributions for affected and unaffected populations that are based on a center's own assay method. Applying published risk tables, however, can affect the accuracy of the risk estimates. We used maternal serum alpha-fetoprotein as an example of an assay with an established history of reporting results in MoM values; however, the concepts presented apply equally well to any assay for which results are reported in MoMs.
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Affiliation(s)
- C A Parvin
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - D L Gray
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - G Kessler
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
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38
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Abstract
Cerebral blood-flow velocities (cm/s) and pulse index (PI) were studied pre- and postoperatively in a total of 15 male patients following bilateral radical/functional (group A; n = 10) or unilateral radical neck dissection (group B; n = 5) using a 2 MHz-pulsed transcranial Doppler ultrasonographical system (TCD), with a transtemporal approach to the middle cerebral artery. Systolic and mean flow velocities were significant reduced with subsequent increases in PI during the first postoperative sonography in group A-patients while no significant differences in TCD date developed in group B. Blood-flow velocities and PI reached control values within three days. General hemodynamic and respiratory parameters did not influence the changes in TCD flow profiles with the exception of moderate increases in arterial CO2 during the early postoperative period. It is concluded that the reductions in blood-flow velocities and concomitant increases in PI reflect a heightened resistance to flow in the arterial cerebral vasculature. The decrease in cerebral vascular compliance suggests increases in the cerebral venous outflow following the resection of essential drainage pathways. However, TCD does not provide any information about the adequacy of cerebral blood flow.
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Affiliation(s)
- C Werner
- Abteilung für Anästhesiologie, Universitäts-Krankenhaus Eppendorf, Hamburg
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39
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Metzler W, Kessler G, Benzer W, Mähr G. [Ophthalmological significance of stenosing carotid processes]. Wien Med Wochenschr 1990; 140:387-9. [PMID: 2219945] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In a retrospective study we looked at the incidence of carotid artery stenosis in 191 ophthalmological patients, which underwent duplex sonography. In all these patients the oculist had considered carotid artery stenosis to be a possible reason for the present eye disease or visual disturbance. The incidence of stenosis found in these patients was compared to a group of 186 persons of the same mean age, which underwent routine-sonography without suffering from any symptoms related to carotid artery disease. Patients with amaurosis fugax, with occluded retinal veins and patients with glaucoma associated changes of the retina (in spite of normal eye pressure) suffered more often from carotis stenosis than asymptomatic persons (statistically significant), patients with occluded retinal arteries showed also more often carotid artery stenosis than the asymptomatic collective but without statistical significance. We conclude, that patients presenting with the mentioned symptoms should undergo carotid artery sonography. Furthermore these results could be of importance in evaluation the indication for carotid thrombendarterectomy (stadium II of cerebrovascular insufficiency).
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Affiliation(s)
- W Metzler
- Internen Abteilung, Landeskrankenhauses Feldkirch
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40
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Sacks DB, Lim MM, Parvin CA, Kessler G. Interference in an automated radial partition fluorescent immunoassay of thyrotropin associated with liver-function abnormalities. Clin Chem 1990; 36:1343-5. [PMID: 2372949] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In a previous evaluation of a "sensitive" radial partition fluorescent immunoassay on the Stratus system, thyrotropin (TSH) values exhibited a positive bias in icteric samples when compared with results of a nonsensitive radioimmunoassay. In the present study, we evaluated 366 patients samples to assess whether any biochemical markers of liver function could identify samples for which TSH values would be falsely increased. gamma-Glutamyltransferase and total bilirubin concentrations were unrelated to discrepant TSH values. In contrast, alkaline phosphatase (ALP) was significantly positively correlated with differences in Stratus and RIA TSH concentrations (P less than 0.001). However, this correlation explained only 34% of the observed residual variability around the estimated regression line. On average, the higher ALP values were associated with larger discrepancies between Stratus and RIA TSH values, although several samples with increased ALP did not have falsely increased Stratus TSH values. TSH measurements performed with a Stratus should be interpreted with caution in patients with abnormal biochemical markers of liver function.
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Affiliation(s)
- D B Sacks
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
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41
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Sacks DB, Lim MM, Parvin CA, Kessler G. Interference in an automated radial partition fluorescent immunoassay of thyrotropin associated with liver-function abnormalities. Clin Chem 1990. [DOI: 10.1093/clinchem/36.7.1343] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
In a previous evaluation of a "sensitive" radial partition fluorescent immunoassay on the Stratus system, thyrotropin (TSH) values exhibited a positive bias in icteric samples when compared with results of a nonsensitive radioimmunoassay. In the present study, we evaluated 366 patients samples to assess whether any biochemical markers of liver function could identify samples for which TSH values would be falsely increased. gamma-Glutamyltransferase and total bilirubin concentrations were unrelated to discrepant TSH values. In contrast, alkaline phosphatase (ALP) was significantly positively correlated with differences in Stratus and RIA TSH concentrations (P less than 0.001). However, this correlation explained only 34% of the observed residual variability around the estimated regression line. On average, the higher ALP values were associated with larger discrepancies between Stratus and RIA TSH values, although several samples with increased ALP did not have falsely increased Stratus TSH values. TSH measurements performed with a Stratus should be interpreted with caution in patients with abnormal biochemical markers of liver function.
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Affiliation(s)
- D B Sacks
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - M M Lim
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - C A Parvin
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - G Kessler
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
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42
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Kessler G, Hendler A, Smolinsky A, Kauli N. Preoperative magnetic resonance imaging in Marfan syndrome. Isr J Med Sci 1990; 26:278-80. [PMID: 2380026] [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: 12/31/2022]
Abstract
We report one of the first cases in Israel of composite-graft repair of an aortic aneurysm in Marfan syndrome, in which preoperative evaluation was done noninvasively using magnetic resonance imaging (MRI). Because of the relatively favorable outcome of surgical compared with medical treatment of aortic aneurysm in patients with Marfan syndrome, surgery is now more frequently considered, even in asymptomatic patients. MRI is an excellent diagnostic tool for evaluating the thoracic aorta and has been suggested as a replacement for preoperative cardiac catheterization. In the case presented here, MRI preoperative confirmation of a 6.0-cm aortic aneurysm in an asymptomatic 38-year-old man with Marfan syndrome, was followed by composite ascending aorta and aortic valve replacement. The postoperative course was good. This case supports the view that aortic aneurysm replacement can be performed based on a noninvasive preoperative evaluation using MRI.
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Affiliation(s)
- G Kessler
- Maccabi Heart Institute, Ramat Gan, Israel
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43
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Fisman EZ, Frank AG, Ben-Ari E, Kessler G, Pines A, Drory Y, Kellermann JJ. Altered left ventricular volume and ejection fraction responses to supine dynamic exercise in athletes. J Am Coll Cardiol 1990; 15:582-8. [PMID: 2303627 DOI: 10.1016/0735-1097(90)90630-8] [Citation(s) in RCA: 30] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Two-dimensional echocardiography was used to determine the responses of left ventricular volumes, ejection fraction and segmental left ventricular motion to supine dynamic exercise in 22 professional athletes, comparing these responses with those in 22 age- and gender-matched healthy untrained individuals. End-systolic volume was significantly greater at rest and during exercise in the athletes (50 +/- 6 versus 29 +/- 4 ml and 40 +/- 5 versus 17 +/- 4 ml, respectively, p less than 0.001 for both). It decreased during exercise in all the untrained subjects, but did not change or increased in nine athletes (41%). End-diastolic volume was greater in the athletes at rest (143 +/- 12 versus 98 +/- 9 ml) and during exercise (157 +/- 14 versus 121 +/- 13 ml, p less than 0.01 for both). It increased in all the untrained subjects, but decreased or did not change in six athletes (27%). Ejection fraction was significantly lower in the athletes at rest and during exercise (65 +/- 4% versus 70 +/- 5% and 73 +/- 5% versus 86 +/- 5%, p less than 0.01 and 0.001, respectively); the values augmented normally in all the untrained subjects, but increased only by less than 5% units, did not change or decreased in nine athletes (41%). Eight athletes (36.5%) failed to demonstrate the expected symmetric hyperkinetic wall motion changes during exercise, which were seen in all the untrained subjects. No correlation was found between atypical responses to exercise and electrocardiographic patterns.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- E Z Fisman
- Cardiac Rehabilitation Institute, Sheba Medical Center, Tel-Hashomer, Israel
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44
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Sacks DB, Lim MM, Valdes R, Kessler G. Radial partition fluorescent immunoassay of thyrotropin. Analytic evaluation and clinical correlation. Am J Clin Pathol 1990; 93:84-90. [PMID: 2294705 DOI: 10.1093/ajcp/93.1.84] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The authors evaluated the analytic and clinical performance of a sensitive radial partition fluorescent enzyme immunoassay for thyrotropin (TSH) performed on Stratus and compared it with a nonsensitive radioimmunoassay (RIA) method. Sensitivity of 0.15 mIU/L was obtained, and precision, specificity, and linearity were acceptable. A good correlation was observed between the two assays in samples from 311 hospitalized patients (r = 0.976). Stratus TSH results were outside the reference range for 20% of clinically euthyroid patients (n = 126), and 2.4% had undetectable levels. The clinically hyperthyroid group (n = 11) with the exception of one patient had TSH values below 0.2 mIU/L. Only 39% of hypothyroid patients on thyroid hormone replacement (n = 74) had TSH values in the reference range, with 38% and 23% exhibiting low and high values, respectively. All untreated primary hypothyroid patients (n = 8) had elevated TSH concentrations. The authors conclude that this sensitive TSH assay is useful for diagnosing hyperthyroidism when there is a clinical suspicion but cannot be recommended for thyroid screening in hospitalized patients.
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Affiliation(s)
- D B Sacks
- Department of Pathology, Washington University Medical Center, St. Louis, MO 63110
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45
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Butch AW, Goodnow TT, Brown WS, McClellan A, Kessler G, Scott MG. Stratus automated creatine kinase-MB assay evaluated: identification and elimination of falsely increased results associated with a high-molecular-mass form of alkaline phosphatase. Clin Chem 1989. [DOI: 10.1093/clinchem/35.10.2048] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
We compared the performance of an automated assay of creatine kinase MB isoenzyme (CK-MB) mass (Stratus) with that of a CK-MB enzymatic assay routinely used at our institutions. Both of these assays use the same CK-MB-specific monoclonal antibody to immunocapture CK-MB, thus providing a direct means of comparing a mass assay with an activity assay. Routine CK-MB measurements for 206 samples within the analytical range of both assays revealed the following relationship: Stratus (micrograms/L) = 0.67 (activity U/L) + 0.18 (r = 0.95, Sx.y = 4.45). The linearity, sensitivity, and precision of the Stratus assay were acceptable for routine clinical use. Icteric, lipemic, and hemolyzed samples do not interfere with the assay. During our evaluation we identified a single, clinically significant false-positive sample. Because this patient had alkaline phosphatase values greater than 1100 U/L, we investigated additional samples with increased activities of alkaline phosphatase and found that samples from 12 of 23 patients selected for alkaline phosphatase values greater than 460 U/L produced falsely increased CK-MB values. We determined that a membrane-associated, high-molecular-mass form of alkaline phosphatase was a cause of these falsely increased values and instituted an approach to identify falsely increased Stratus CK-MB values. Samples from 23 of 1933 patients were falsely increased, the increase being clinically significant in samples from 14 of these patients. Consultation with the manufacturer resulted in the successful reformulation of the substrate/wash solution to minimize interferences from high-molecular-mass forms of alkaline phosphatase.
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Affiliation(s)
- A W Butch
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - T T Goodnow
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - W S Brown
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - A McClellan
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - G Kessler
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
| | - M G Scott
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
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46
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Butch AW, Goodnow TT, Brown WS, McClellan A, Kessler G, Scott MG. Stratus automated creatine kinase-MB assay evaluated: identification and elimination of falsely increased results associated with a high-molecular-mass form of alkaline phosphatase. Clin Chem 1989; 35:2048-53. [PMID: 2676240] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We compared the performance of an automated assay of creatine kinase MB isoenzyme (CK-MB) mass (Stratus) with that of a CK-MB enzymatic assay routinely used at our institutions. Both of these assays use the same CK-MB-specific monoclonal antibody to immunocapture CK-MB, thus providing a direct means of comparing a mass assay with an activity assay. Routine CK-MB measurements for 206 samples within the analytical range of both assays revealed the following relationship: Stratus (micrograms/L) = 0.67 (activity U/L) + 0.18 (r = 0.95, Sx.y = 4.45). The linearity, sensitivity, and precision of the Stratus assay were acceptable for routine clinical use. Icteric, lipemic, and hemolyzed samples do not interfere with the assay. During our evaluation we identified a single, clinically significant false-positive sample. Because this patient had alkaline phosphatase values greater than 1100 U/L, we investigated additional samples with increased activities of alkaline phosphatase and found that samples from 12 of 23 patients selected for alkaline phosphatase values greater than 460 U/L produced falsely increased CK-MB values. We determined that a membrane-associated, high-molecular-mass form of alkaline phosphatase was a cause of these falsely increased values and instituted an approach to identify falsely increased Stratus CK-MB values. Samples from 23 of 1933 patients were falsely increased, the increase being clinically significant in samples from 14 of these patients. Consultation with the manufacturer resulted in the successful reformulation of the substrate/wash solution to minimize interferences from high-molecular-mass forms of alkaline phosphatase.
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Affiliation(s)
- A W Butch
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110
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47
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Pines A, Fisman EZ, Ben-Ari E, Modan M, Kessler G, Drory Y, Kellermann JJ. Usefulness of immediate postexercise two-dimensional echocardiography in post-myocardial infarction patients without ischemic ECG changes in stress testing: comparison with radionuclide angiography. Angiology 1989; 40:605-12. [PMID: 2742205 DOI: 10.1177/000331978904000701] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Of 38 post-myocardial infarction (MI) applicants for a cardiac rehabilitation program, 17 (45%) did not have ischemic ECG changes in exercise testing. Ten (59%) of these 17 patients had echocardiographic wall motion abnormalities at rest. Immediate postexercise two-dimensional echocardiography demonstrated exercise-induced changes in 8 (47%) patients (2 with normal and 6 with abnormal results from rest studies). The comparative radionuclide (RNA) examinations showed that there were 6 patients with abnormal findings from rest RNA; exercise-induced changes were detected in 7 (44%) of 16 patients (3 with normal and 4 with abnormal results from rest RNA tests). Statistical analyses, using RNA as reference point, revealed that the total correctly diagnosed cases for the echocardiographic rest studies was 13/17 (77%) and for the exercise studies, 13/16 (81%). The negative predictive values were 7/7 (100%) and 7/8 (88%), respectively. The corresponding positive predictive values were 6/10 (60%) and 6/8 (75%). The same pattern was observed when each segment (septal, apical, and posterolateral) was evaluated separately. The authors conclude that in post-MI patients with a negative stress test, the efficacy of postexercise echocardiography equals that of RNA in the identification of additional patients with ischemia.
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Affiliation(s)
- A Pines
- Cardiac Rehabilitation Institute, Chaim Sheba Medical Center, Tel-Hashomer, Israel
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Kessler G, Rauchfuss A, Werner C. [Pulse oximetry in surgery of the bronchial system]. HNO 1989; 37:216-9. [PMID: 2732104] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Oxygen saturation was determined by pulse oximetry in 35 children and adults during general anaesthesia using jet- or manually assisted ventilation for minor elective laryngeal and tracheo-bronchial surgery. The method is non-invasive and provides continuous information about the arterial oxygen saturation (saO2) and heart rate. Compromised arterial oxygenation during anaesthesia and the effects and brief ventilatory arrest are accurately detectable. Data such as pO2, pCO2 or pH cannot be assessed by pulse oximetry; carbon monoxide and methemoglobinaemia may lead to less accurate results. Pulse oximetry provides on-line information about sudden hypoxic events and allows early therapeutic intervention because arterial desaturation precedes the clinical signs and symptoms of hypoxia.
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Affiliation(s)
- G Kessler
- Institut für Anästhesiologie, Universitäts-Krankenhaus Eppendorf
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49
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Abstract
A case of obstruction of the upper respiratory tract is reported, in which an intubation or insufflation by rigid tracheobronchoscopes was not possible. Due to the anatomical situation after multiple operations and irradiation, coniotomy could not be performed. Blind puncture of the trachea with subsequent High Frequency Jet Ventilation has proved successful as an emergency approach to maintain respiratory function.
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50
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Hortin GL, Cole TG, Gibson DW, Kessler G. Decreased stability of triglycerides and increased free glycerol in serum from heparin-treated patients. Clin Chem 1988; 34:1847-9. [PMID: 3416432] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Triglycerides usually are stable in serum. However, for a few patients, we noted marked decreases in measured triglycerides when the same serum specimen was analyzed on successive days. This was found to be ascribable to intravenous administration of heparin. Measured triglyceride in serum of 11 patients being treated with heparin decreased 34% (SD 17%) in samples stored for one day at room temperature. Triglyceride values for sera from control patients remained unchanged. Increases in free glycerol corresponded to the observed decreased in triglycerides. Measurement of free glycerol thus provides a means of recognizing this problem.
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Affiliation(s)
- G L Hortin
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
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