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Roca V, Gómez-Ramírez F, Espasandín I, Megía-Palma R, Perera A, Martínez-Freiría F. First helminthological data on the Iberian adder, Vipera seoanei. Parasitol Res 2023:10.1007/s00436-023-07849-9. [PMID: 37093300 DOI: 10.1007/s00436-023-07849-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 04/15/2023] [Indexed: 04/25/2023]
Abstract
The helminth fauna present in the gut contents of Iberian adders, Vipera seoanei (Squamata: Viperidae), were characterised and analysed in respect to biological and eco-geographic factors that may affect the occurrence and diversity of helminths in this species. A total of 317 samples of preserved stomachs and intestines, covering the distributional range of V. seoanei, were examined. Similar to other Vipera species from the Iberian Peninsula, the helminth fauna was also impoverished in V. seoanei, but unlike other Vipera species from Central and East Europe, helminths were mostly found in adult vipers, and occurred in vipers located at the periphery of the species range, characterised by low elevation, high temperature and precipitation levels, and abundant pastures.
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Affiliation(s)
- V Roca
- Departament de ZoologiaFacultat de Ciències Biològiques, Universitat de València, C/Dr. Moliner, 50, 46100, Burjassot, Spain.
| | - F Gómez-Ramírez
- Departament de ZoologiaFacultat de Ciències Biològiques, Universitat de València, C/Dr. Moliner, 50, 46100, Burjassot, Spain
| | - I Espasandín
- Grupo de Investigación en Bioloxía Evolutiva (GIBE), Departamento de Bioloxía, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira, S/N, 15071, A Coruña, Spain
| | - R Megía-Palma
- CIBIO, Centro de Investigação Em Biodiversidade E Recursos GenéticosInBIO Laboratório Associado, Campus de Vairão, Universidade Do Porto, P-4485-661, Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO Campus de Vairão, P-4485-661, Vairão, Portugal
- Department of Biomedicine and Biotechnology, School of Pharmacy, Universidad de Alcalá (UAH), 28805, Alcalá de Henares, Madrid, Spain
| | - A Perera
- CIBIO, Centro de Investigação Em Biodiversidade E Recursos GenéticosInBIO Laboratório Associado, Campus de Vairão, Universidade Do Porto, P-4485-661, Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO Campus de Vairão, P-4485-661, Vairão, Portugal
| | - F Martínez-Freiría
- CIBIO, Centro de Investigação Em Biodiversidade E Recursos GenéticosInBIO Laboratório Associado, Campus de Vairão, Universidade Do Porto, P-4485-661, Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO Campus de Vairão, P-4485-661, Vairão, Portugal
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2
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Verra L, Zevi Della Porta G, Pucek J, Nechaeva T, Wyler S, Bergamaschi M, Senes E, Guran E, Moody JT, Kedves MÁ, Gschwendtner E, Muggli P, Agnello R, Ahdida CC, Goncalves MCA, Andrebe Y, Apsimon O, Apsimon R, Arnesano JM, Bachmann AM, Barrientos D, Batsch F, Bencini V, Blanchard P, Burrows PN, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke DA, Davut C, Demeter G, Dexter AC, Doebert S, Elverson FA, Farmer J, Fasoli A, Fedosseev V, Fonseca R, Furno I, Gorn A, Granados E, Granetzny M, Graubner T, Grulke O, Hafych V, Henderson J, Hüther M, Khudiakov V, Kim SY, Kraus F, Krupa M, Lefevre T, Liang L, Liu S, Lopes N, Lotov K, Martinez Calderon M, Mazzoni S, Medina Godoy D, Moon K, Morales Guzmán PI, Moreira M, Nowak E, Pakuza C, Panuganti H, Pardons A, Pepitone K, Perera A, Pukhov A, Ramjiawan RL, Rey S, Schmitz O, Silva F, Silva L, Stollberg C, Sublet A, Swain C, Topaloudis A, Torrado N, Tuev P, Velotti F, Verzilov V, Vieira J, Weidl M, Welsch C, Wendt M, Wing M, Wolfenden J, Woolley B, Xia G, Yarygova V, Zepp M. Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma. Phys Rev Lett 2022; 129:024802. [PMID: 35867433 DOI: 10.1103/physrevlett.129.024802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton bunch can be seeded by the wakefields driven by a preceding electron bunch. SM timing reproducibility and control are at the level of a small fraction of the modulation period. With this seeding method, we independently control the amplitude of the seed wakefields with the charge of the electron bunch and the growth rate of SM with the charge of the proton bunch. Seeding leads to larger growth of the wakefields than in the instability case.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - R Agnello
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | | | | | - Y Andrebe
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - O Apsimon
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - R Apsimon
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Lancaster University, Lancaster LA1 4YB, United Kingdom
| | | | - A-M Bachmann
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - F Batsch
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - V Bencini
- CERN, 1211 Geneva 23, Switzerland
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - P Blanchard
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - P N Burrows
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - M Chung
- UNIST, Ulsan 44919, Republic of Korea
| | | | - C Davut
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - G Demeter
- Wigner Research Centre for Physics, 1121 Budapest, Hungary
| | - A C Dexter
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Lancaster University, Lancaster LA1 4YB, United Kingdom
| | | | | | - J Farmer
- CERN, 1211 Geneva 23, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - A Fasoli
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | | | - R Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1049-001 Lisbon, Portugal
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - I Furno
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | | | - M Granetzny
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - T Graubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - V Hafych
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - J Henderson
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Accelerator Science and Technology Centre, ASTeC, STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - V Khudiakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - S-Y Kim
- CERN, 1211 Geneva 23, Switzerland
- UNIST, Ulsan 44919, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - M Krupa
- CERN, 1211 Geneva 23, Switzerland
| | | | - L Liang
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - S Liu
- TRIUMF, Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | | | | | | | - K Moon
- UNIST, Ulsan 44919, Republic of Korea
| | | | - M Moreira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - E Nowak
- CERN, 1211 Geneva 23, Switzerland
| | - C Pakuza
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | | | | | - K Pepitone
- Angstrom Laboratory, Department of Physics and Astronomy, 752 37 Uppsala, Sweden
| | - A Perera
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - A Pukhov
- Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - R L Ramjiawan
- CERN, 1211 Geneva 23, Switzerland
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - S Rey
- CERN, 1211 Geneva 23, Switzerland
| | - O Schmitz
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - F Silva
- INESC-ID, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - C Stollberg
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - A Sublet
- CERN, 1211 Geneva 23, Switzerland
| | - C Swain
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | | | - N Torrado
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | | | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - M Weidl
- Max Planck Institute for Plasma Physics, 80805 Munich, Germany
| | - C Welsch
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - M Wendt
- CERN, 1211 Geneva 23, Switzerland
| | - M Wing
- UCL, London WC1 6BT, United Kingdom
| | - J Wolfenden
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | | | - G Xia
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - V Yarygova
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | - M Zepp
- University of Wisconsin, Madison, Wisconsin 53706, USA
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3
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Batsch F, Muggli P, Agnello R, Ahdida CC, Amoedo Goncalves MC, Andrebe Y, Apsimon O, Apsimon R, Bachmann AM, Baistrukov MA, Blanchard P, Braunmüller F, Burrows PN, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke DA, Damerau H, Davut C, Demeter G, Deubner HL, Doebert S, Farmer J, Fasoli A, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Furno I, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Granetzny M, Graubner T, Grulke O, Gschwendtner E, Hafych V, Helm A, Henderson JR, Hüther M, Kargapolov IY, Kim SY, Kraus F, Krupa M, Lefevre T, Liang L, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Moody JT, Moon K, Morales Guzmán PI, Moreira M, Nechaeva T, Nowak E, Pakuza C, Panuganti H, Pardons A, Perera A, Pucek J, Pukhov A, Ramjiawan RL, Rey S, Rieger K, Schmitz O, Senes E, Silva LO, Speroni R, Spitsyn RI, Stollberg C, Sublet A, Topaloudis A, Torrado N, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Wendt M, Wing M, Wiwattananon P, Wolfenden J, Woolley B, Xia G, Zepp M, Zevi Della Porta G. Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma. Phys Rev Lett 2021; 126:164802. [PMID: 33961468 DOI: 10.1103/physrevlett.126.164802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/18/2021] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude [≥(4.1±0.4) MV/m], the phase of the modulation along the bunch is reproducible from event to event, with 3%-7% (of 2π) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated.
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Affiliation(s)
- F Batsch
- Max Planck Institute for Physics, Munich, Germany
| | - P Muggli
- Max Planck Institute for Physics, Munich, Germany
| | - R Agnello
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | | | - Y Andrebe
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - O Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - R Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - A-M Bachmann
- Max Planck Institute for Physics, Munich, Germany
| | - M A Baistrukov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - P Blanchard
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - P N Burrows
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | - J Chappell
- University College London, London, United Kingdom
| | | | - M Chung
- Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea
| | - D A Cooke
- University College London, London, United Kingdom
| | | | - C Davut
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - G Demeter
- Wigner Research Center for Physics, Budapest, Hungary
| | - H L Deubner
- Philipps-Universität Marburg, Marburg, Germany
| | | | - J Farmer
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
| | - A Fasoli
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - R Fiorito
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, Portugal
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - I Furno
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - S Gessner
- CERN, Geneva, Switzerland
- SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | | | - A A Gorn
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | | | - M Granetzny
- University of Wisconsin, Madison, Wisconsin, USA
| | - T Graubner
- Philipps-Universität Marburg, Marburg, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany
- Technical University of Denmark, Lyngby, Denmark
| | | | - V Hafych
- Max Planck Institute for Physics, Munich, Germany
| | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, Daresbury, United Kingdom
- Accelerator Science and Technology Centre, ASTeC, STFC Daresbury Laboratory, Warrington, United Kingdom
| | - M Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - I Yu Kargapolov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - S-Y Kim
- Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | | | | | - L Liang
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - S Liu
- TRIUMF, Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K V Lotov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - M Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - V A Minakov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - J T Moody
- Max Planck Institute for Physics, Munich, Germany
| | - K Moon
- Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea
| | | | - M Moreira
- CERN, Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - T Nechaeva
- Max Planck Institute for Physics, Munich, Germany
| | | | - C Pakuza
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | | | | | - A Perera
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - J Pucek
- Max Planck Institute for Physics, Munich, Germany
| | - A Pukhov
- Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - R L Ramjiawan
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - S Rey
- CERN, Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, Munich, Germany
| | - O Schmitz
- University of Wisconsin, Madison, Wisconsin, USA
| | - E Senes
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - R I Spitsyn
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - C Stollberg
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | | | - N Torrado
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P V Tuev
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - M Turner
- CERN, Geneva, Switzerland
- Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | | | - L Verra
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | | | - M Wing
- University College London, London, United Kingdom
| | | | - J Wolfenden
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | | | - G Xia
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - M Zepp
- University of Wisconsin, Madison, Wisconsin, USA
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4
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Braunmüller F, Nechaeva T, Adli E, Agnello R, Aladi M, Andrebe Y, Apsimon O, Apsimon R, Bachmann AM, Baistrukov MA, Batsch F, Bergamaschi M, Blanchard P, Burrows PN, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke DA, Damerau H, Davut C, Demeter G, Deubner LH, Dexter A, Djotyan GP, Doebert S, Farmer J, Fasoli A, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Furno I, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Granetzny M, Grulke O, Gschwendtner E, Hafych V, Hartin A, Helm A, Henderson JR, Howling A, Hüther M, Jacquier R, Jolly S, Kargapolov IY, Kedves MÁ, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liang L, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Moody JT, Morales Guzmán PI, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pucek J, Pukhov A, Ráczkevi B, Ramjiawan RL, Rey S, Ruhl H, Saberi H, Schmitz O, Senes E, Sherwood P, Silva LO, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Williamson B, Wing M, Wolfenden J, Woolley B, Xia G, Zepp M, Zevi Della Porta G. Proton Bunch Self-Modulation in Plasma with Density Gradient. Phys Rev Lett 2020; 125:264801. [PMID: 33449727 DOI: 10.1103/physrevlett.125.264801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/10/2020] [Accepted: 11/10/2020] [Indexed: 06/12/2023]
Abstract
We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400 GeV proton bunch. Results show that a positive or negative gradient increases or decreases the number of microbunches and the relative charge per microbunch observed after 10 m of plasma. The measured modulation frequency also increases or decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields' phase velocity due to plasma density gradients adding to the slow wakefields' phase velocity during self-modulation growth predicted by linear theory.
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Affiliation(s)
| | - T Nechaeva
- Belarusian State University, Minsk, Belarus
| | - E Adli
- University of Oslo, Oslo, Norway
| | - R Agnello
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - M Aladi
- Wigner Research Center for Physics, Budapest, Hungary
| | - Y Andrebe
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - O Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - R Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - A-M Bachmann
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | - M A Baistrukov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - F Batsch
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | | | - P Blanchard
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - P N Burrows
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - M Chung
- UNIST, Ulsan, Republic of Korea
| | | | | | - C Davut
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - G Demeter
- Wigner Research Center for Physics, Budapest, Hungary
| | - L H Deubner
- Philipps-Universität Marburg, Marburg, Germany
| | - A Dexter
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - G P Djotyan
- Wigner Research Center for Physics, Budapest, Hungary
| | | | - J Farmer
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
| | - A Fasoli
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - R Fiorito
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, Lisbon, Portugal
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - I Furno
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - S Gessner
- CERN, Geneva, Switzerland
- SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - M Granetzny
- University of Wisconsin, Madison, Wisconsin, USA
| | - O Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany
- Technical University of Denmark, Lyngby, Denmark
| | | | - V Hafych
- Max Planck Institute for Physics, Munich, Germany
| | | | - A Helm
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, Daresbury, United Kingdom
- Accelerator Science and Technology Centre, ASTeC, STFC Daresbury Laboratory, Warrington, United Kingdom
| | - A Howling
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - R Jacquier
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - I Yu Kargapolov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - M Á Kedves
- Wigner Research Center for Physics, Budapest, Hungary
| | | | | | - S-Y Kim
- UNIST, Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | | | | | - Y Li
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - L Liang
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - S Liu
- TRIUMF, Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - M Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - J T Moody
- Max Planck Institute for Physics, Munich, Germany
| | | | - M Moreira
- CERN, Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P Muggli
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - A Perera
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - A Petrenko
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - J Pucek
- Max Planck Institute for Physics, Munich, Germany
| | - A Pukhov
- Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - B Ráczkevi
- Wigner Research Center for Physics, Budapest, Hungary
| | - R L Ramjiawan
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - S Rey
- CERN, Geneva, Switzerland
| | - H Ruhl
- Ludwig-Maximilians-Universität, Munich, Germany
| | | | - O Schmitz
- University of Wisconsin, Madison, Wisconsin, USA
| | - E Senes
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | | | - L Verra
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C P Welsch
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - B Williamson
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - M Wing
- UCL, London, United Kingdom
| | - J Wolfenden
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | | | - G Xia
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - M Zepp
- University of Wisconsin, Madison, Wisconsin, USA
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Gschwendtner E, Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Batsch F, Bracco C, Braunmüller F, Burger S, Burt G, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Grulke O, Hartin A, Helm A, Henderson JR, Hüther M, Ibison M, Jolly S, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Minakov VA, Molendijk JC, Moody JT, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pukhov A, Rey S, Sherwood P, Silva LO, Sosedkin AP, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Wendt M, Williamson B, Wing M, Woolley B, Xia G. Correction to 'Proton-driven plasma wakefield acceleration in AWAKE'. Philos Trans A Math Phys Eng Sci 2020; 378:20190539. [PMID: 31865874 PMCID: PMC6939239 DOI: 10.1098/rsta.2019.0539] [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: 06/10/2023]
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6
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Chen CH, Perera A, Jackson P, Hallmark B, Davidson J. The distortion of a horizontal soap film due to the impact of a falling sphere. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.04.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jayatissa R, Wijenayaka N, de Alwis N, Perera A, Munasinghe A, Karunaratna P, Fernando V. MON-PO435: Disease Related Malnutrition in Patients with Pulmonary Tuberculosis (TB), Attending District Chest Clinics (DCC) of Colombo and Gampaha Districts. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32268-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Gschwendtner E, Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Batsch F, Bracco C, Braunmüller F, Burger S, Burt G, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Grulke O, Hartin A, Helm A, Henderson JR, Hüther M, Ibison M, Jolly S, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Minakov VA, Molendijk JC, Moody JT, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pukhov A, Rey S, Sherwood P, Silva LO, Sosedkin AP, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Wendt M, Williamson B, Wing M, Woolley B, Xia G. Proton-driven plasma wakefield acceleration in AWAKE. Philos Trans A Math Phys Eng Sci 2019; 377:20180418. [PMID: 31230571 PMCID: PMC6602911 DOI: 10.1098/rsta.2018.0418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/25/2019] [Indexed: 06/09/2023]
Abstract
In this article, we briefly summarize the experiments performed during the first run of the Advanced Wakefield Experiment, AWAKE, at CERN (European Organization for Nuclear Research). The final goal of AWAKE Run 1 (2013-2018) was to demonstrate that 10-20 MeV electrons can be accelerated to GeV energies in a plasma wakefield driven by a highly relativistic self-modulated proton bunch. We describe the experiment, outline the measurement concept and present first results. Last, we outline our plans for the future. This article is part of the Theo Murphy meeting issue 'Directions in particle beam-driven plasma wakefield acceleration'.
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Affiliation(s)
| | | | - E. Adli
- University of Oslo, Oslo, Norway
| | | | - O. Apsimon
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - R. Apsimon
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - A.-M. Bachmann
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - F. Batsch
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | | | | | | | - G. Burt
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | - B. Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A. Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | | | | | | | | | - A. Dexter
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | | | - J. Farmer
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | | | - R. Fiorito
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | - R. A. Fonseca
- ISCTE - Instituto Universitéario de Lisboa, Portugal
| | | | | | | | | | | | - A. A. Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - O. Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany
- Technical University of Denmark, Lyngby, Denmark
| | | | - A. Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J. R. Henderson
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | - M. Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - M. Ibison
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | | | | | | | | | - F. Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | | | | | - Y. Li
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - S. Liu
- TRIUMF, Vancouver, Canada
| | - N. Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K. V. Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - M. Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | - V. A. Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - J. T. Moody
- Max Planck Institute for Physics, Munich, Germany
| | - M. Moreira
- CERN, Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P. Muggli
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F. Peña Asmus
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - A. Perera
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | - A. Petrenko
- CERN, Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - A. Pukhov
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | - S. Rey
- CERN, Geneva, Switzerland
| | | | - L. O. Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - A. P. Sosedkin
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - P. V. Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - L. Verra
- CERN, Geneva, Switzerland
- University of Milan, Milan, Italy
| | | | - J. Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C. P. Welsch
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | | | - B. Williamson
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | | | | | - G. Xia
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
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Perera A, Rajashekar D, Pereira E, Shtaya A. TM3-6 Symptomatic intracranial arachnoid cysts: a centre series. J Neurol Psychiatry 2019. [DOI: 10.1136/jnnp-2019-abn.52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
ObjectivesTo study the presentation, management and outcomes of symptomatic intracranial arachnoid cysts.DesignRetrospective records review.SubjectsAll cases coded as intracranial cysts.MethodsPatients admitted between Jan-2012 and Sep 2017. Of 56 cases, only 24 were arachnoid cysts. Median age 57 (range 8–81). Mean 49.1±5.0 years, 8 males and 16 females.ResultsMales were significantly younger (34.3±9.1 vs 56.5±5.2 year-old, p=0.03) and outnumbered females. Mean size of cysts was 58.8±6.1 mm (range 18.5–126 mm). Five were located frontally, one fronto-temporal and another fronto-parietal, two parietal and two parieto-occipital, two within third ventricle, one intraventricular, one supra sellar and one intra sellar while eight were posterior fossa. 12 patients had headache, five presented with cognitive and memory issues, five had visual problems, four with limb weakness and two had cerebellar signs. Eight had open fenestration, five endoscopic fenestration, four had aspiration with reservoir, two aspiration only, two marsupialisation, two received ICP monitor and one had no treatment. One reservoir was aspirated three times and another open fenestration had another surgical fenestration. Two had transient infection, two needed VP shunts and one had cysto-peritoneal shunt. mRS (0–2) improved significantly after the treatment (62.5% pre-surgery to 91.7% post-surgery, p=0.016).ConclusionsSymptomatic arachnoid cysts are more common in young males. In the literature, the most common location is middle cranial fossa which is not the case in symptomatic arachnoid cysts as in our series. Although intervention is variable, they are associated with very good outcomes.
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Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barrientos D, Barros MM, Batkiewicz J, Batsch F, Bauche J, Berglyd Olsen VK, Bernardini M, Biskup B, Boccardi A, Bogey T, Bohl T, Bracco C, Braunmüller F, Burger S, Burt G, Bustamante S, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fior G, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Guerrero A, Hansen J, Helm A, Henderson JR, Hessler C, Hofle W, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Lefevre T, LeGodec G, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Mompo R, Moody JT, Moreira M, Muggli P, Mutin C, Öz E, Ozturk E, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Plyushchev G, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Shaposhnikova E, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Experimental Observation of Proton Bunch Modulation in a Plasma at Varying Plasma Densities. Phys Rev Lett 2019; 122:054802. [PMID: 30822008 DOI: 10.1103/physrevlett.122.054802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Indexed: 06/09/2023]
Abstract
We give direct experimental evidence for the observation of the full transverse self-modulation of a long, relativistic proton bunch propagating through a dense plasma. The bunch exits the plasma with a periodic density modulation resulting from radial wakefield effects. We show that the modulation is seeded by a relativistic ionization front created using an intense laser pulse copropagating with the proton bunch. The modulation extends over the length of the proton bunch following the seed point. By varying the plasma density over one order of magnitude, we show that the modulation frequency scales with the expected dependence on the plasma density, i.e., it is equal to the plasma frequency, as expected from theory.
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Affiliation(s)
- E Adli
- University of Oslo, 0316 Oslo, Norway
| | - A Ahuja
- CERN, 1211 Geneva, Switzerland
| | - O Apsimon
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - R Apsimon
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - A-M Bachmann
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | - F Batsch
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | | | | | - T Bogey
- CERN, 1211 Geneva, Switzerland
| | - T Bohl
- CERN, 1211 Geneva, Switzerland
| | | | - F Braunmüller
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - G Burt
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - M Chung
- UNIST, 44919 Ulsan, Republic of Korea
| | - D Cooke
- UCL, WC1E 6BT London, United Kingdom
| | | | - L Deacon
- UCL, WC1E 6BT London, United Kingdom
| | - L H Deubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - A Dexter
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | | | - G Fior
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - R Fiorito
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1649-026 Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Lyngby, Denmark
| | | | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - W Hofle
- CERN, 1211 Geneva, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Ibison
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | | | - S Jolly
- UCL, WC1E 6BT London, United Kingdom
| | - F Keeble
- UCL, WC1E 6BT London, United Kingdom
| | - S-Y Kim
- UNIST, 44919 Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | | | | | - Y Li
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - S Liu
- TRIUMF, V6T 2A3 Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - R Mompo
- CERN, 1211 Geneva, Switzerland
| | - J T Moody
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Moreira
- CERN, 1211 Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Muggli
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - C Mutin
- CERN, 1211 Geneva, Switzerland
| | - E Öz
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - F Peña Asmus
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | - A Perera
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - A Petrenko
- CERN, 1211 Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | - S Rey
- CERN, 1211 Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, 80539 Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, 630090 Novosibirsk, Russia
- Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090 Novosibirsk, Russia
| | | | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Soby
- CERN, 1211 Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | | | - L Verra
- CERN, 1211 Geneva, Switzerland
- University of Milan, 20122 Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - B Williamson
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - M Wing
- UCL, WC1E 6BT London, United Kingdom
| | | | - G Xia
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
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11
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Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barros Marin M, Barrientos D, Batsch F, Batkiewicz J, Bauche J, Berglyd Olsen VK, Bernardini M, Biskup B, Boccardi A, Bogey T, Bohl T, Bracco C, Braunmüller F, Burger S, Burt G, Bustamante S, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fior G, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Guerrero A, Hansen J, Helm A, Henderson JR, Hessler C, Hofle W, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Lefevre T, LeGodec G, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Mompo R, Moody JT, Moreira M, Muggli P, Öz E, Ozturk E, Mutin C, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Plyushchev G, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Shaposhnikova E, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Experimental Observation of Plasma Wakefield Growth Driven by the Seeded Self-Modulation of a Proton Bunch. Phys Rev Lett 2019; 122:054801. [PMID: 30822039 DOI: 10.1103/physrevlett.122.054801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Indexed: 06/09/2023]
Abstract
We measure the effects of transverse wakefields driven by a relativistic proton bunch in plasma with densities of 2.1×10^{14} and 7.7×10^{14} electrons/cm^{3}. We show that these wakefields periodically defocus the proton bunch itself, consistently with the development of the seeded self-modulation process. We show that the defocusing increases both along the bunch and along the plasma by using time resolved and time-integrated measurements of the proton bunch transverse distribution. We evaluate the transverse wakefield amplitudes and show that they exceed their seed value (<15 MV/m) and reach over 300 MV/m. All these results confirm the development of the seeded self-modulation process, a necessary condition for external injection of low energy and acceleration of electrons to multi-GeV energy levels.
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Affiliation(s)
| | - E Adli
- University of Oslo, 0316 Oslo, Norway
| | - A Ahuja
- CERN, 1211 Geneva, Switzerland
| | - O Apsimon
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - R Apsimon
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - A-M Bachmann
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | - F Batsch
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | | | | | | | - T Bogey
- CERN, 1211 Geneva, Switzerland
| | - T Bohl
- CERN, 1211 Geneva, Switzerland
| | | | - F Braunmüller
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - G Burt
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - M Chung
- UNIST, 44919 Ulsan, Republic of Korea
| | - D Cooke
- UCL, WC1E 6BT London, United Kingdom
| | | | - L Deacon
- UCL, WC1E 6BT London, United Kingdom
| | - L H Deubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - A Dexter
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | | | - G Fior
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - R Fiorito
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1649-026 Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Lyngby, Denmark
| | | | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - W Hofle
- CERN, 1211 Geneva, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Ibison
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | | | - S Jolly
- UCL, WC1E 6BT London, United Kingdom
| | - F Keeble
- UCL, WC1E 6BT London, United Kingdom
| | - S-Y Kim
- UNIST, 44919 Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | | | | | - Y Li
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - S Liu
- TRIUMF, V6T 2A3 Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - R Mompo
- CERN, 1211 Geneva, Switzerland
| | - J T Moody
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Moreira
- CERN, 1211 Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Muggli
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - E Öz
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - C Mutin
- CERN, 1211 Geneva, Switzerland
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | - A Perera
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - A Petrenko
- CERN, 1211 Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - G Plyushchev
- CERN, 1211 Geneva, Switzerland
- Swiss Plasma Center, EPFL, 1015 Lausanne, Switzerland
| | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | - S Rey
- CERN, 1211 Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, 80539 Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, 630090 Novosibirsk, Russia
- Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090 Novosibirsk, Russia
| | | | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Soby
- CERN, 1211 Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - L Verra
- CERN, 1211 Geneva, Switzerland
- University of Milan, 20122 Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - B Williamson
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - M Wing
- UCL, WC1E 6BT London, United Kingdom
| | | | - G Xia
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
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12
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Singh K, Ghataura H, Chen C, Kishore A, Perera A, Jung R, Parlow S, Hibbert B, Simard T. Incidence, Clinical Characteristics and In-Hospital Outcomes of MINOCA Patients: A Combined Analysis from 2 Large Registry Datasets. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Denlinger C, Infante J, Aljumaily R, Naing A, Chintakuntlawar A, Rizvi N, Ross H, Gordon M, Kumar R, Ma M, Yan L, Vicini P, Standifer N, Cann J, Perera A, Durham N, Krishnan S, Balmanoukian A. A phase I study of MEDI1873, a novel GITR agonist, in advanced solid tumors. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy288.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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Abstract
AbstractSpirometry is the most commonly used pulmonary function test. The aim of this comparative study was to evaluate four commercially available spirometers with different measurement principles (turbine-, ultrasound-, differential pressure- and hot-wire anemometer). In particular, the measurement accuracy in breathing manoeuvres with low flow rates was investigated, which is highly relevant for paediatric use. Among the tested devices the hot-wire based spirometer showed the highest measurement accuracy at low flows whilst fully complying with the ATS/ERS standards.
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Affiliation(s)
| | - Petra Friedrich
- 2University of Applied Sciences Kempten, CoKeTT Center, 87435Kempten, Germany
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15
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Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barrientos D, Batsch F, Bauche J, Berglyd Olsen VK, Bernardini M, Bohl T, Bracco C, Braunmüller F, Burt G, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Hansen J, Helm A, Henderson JR, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Moody JT, Moreira M, Muggli P, Öz E, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Acceleration of electrons in the plasma wakefield of a proton bunch. Nature 2018; 561:363-367. [PMID: 30188496 PMCID: PMC6786972 DOI: 10.1038/s41586-018-0485-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/14/2018] [Indexed: 12/03/2022]
Abstract
High-energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. To increase the energy of the particles or to reduce the size of the accelerator, new acceleration schemes need to be developed. Plasma wakefield acceleration1–5, in which the electrons in a plasma are excited, leading to strong electric fields (so called ‘wakefields’), is one such promising acceleration technique. Experiments have shown that an intense laser pulse6–9 or electron bunch10,11 traversing a plasma can drive electric fields of tens of gigavolts per metre and above—well beyond those achieved in conventional radio-frequency accelerators (about 0.1 gigavolt per metre). However, the low stored energy of laser pulses and electron bunches means that multiple acceleration stages are needed to reach very high particle energies5,12. The use of proton bunches is compelling because they have the potential to drive wakefields and to accelerate electrons to high energy in a single acceleration stage13. Long, thin proton bunches can be used because they undergo a process called self-modulation14–16, a particle–plasma interaction that splits the bunch longitudinally into a series of high-density microbunches, which then act resonantly to create large wakefields. The Advanced Wakefield (AWAKE) experiment at CERN17–19 uses high-intensity proton bunches—in which each proton has an energy of 400 gigaelectronvolts, resulting in a total bunch energy of 19 kilojoules—to drive a wakefield in a ten-metre-long plasma. Electron bunches are then injected into this wakefield. Here we present measurements of electrons accelerated up to two gigaelectronvolts at the AWAKE experiment, in a demonstration of proton-driven plasma wakefield acceleration. Measurements were conducted under various plasma conditions and the acceleration was found to be consistent and reliable. The potential for this scheme to produce very high-energy electron bunches in a single accelerating stage20 means that our results are an important step towards the development of future high-energy particle accelerators21,22. Electron acceleration to very high energies is achieved in a single step by injecting electrons into a ‘wake’ of charge created in a 10-metre-long plasma by speeding long proton bunches.
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Affiliation(s)
- E Adli
- University of Oslo, Oslo, Norway
| | | | - O Apsimon
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | - R Apsimon
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - A-M Bachmann
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | - F Batsch
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | | | | | - T Bohl
- CERN, Geneva, Switzerland
| | | | | | - G Burt
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | | | | | | | | | | | - L H Deubner
- Philipps-Universität Marburg, Marburg, Germany
| | - A Dexter
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | | | - R Fiorito
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany.,Technical University of Denmark, Lyngby, Denmark
| | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - M Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - M Ibison
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | | | | | | | | | - F Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | - Y Li
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | - S Liu
- TRIUMF, Vancouver, British Columbia, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | | | - J T Moody
- Max Planck Institute for Physics, Munich, Germany
| | - M Moreira
- CERN, Geneva, Switzerland.,GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P Muggli
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany
| | - E Öz
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | - A Perera
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - A Petrenko
- CERN, Geneva, Switzerland.,Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | - S Rey
- CERN, Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, Novosibirsk, Russia.,Institute of Computational Mathematics and Mathematical Geophysics SB RAS, Novosibirsk, Russia
| | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - L Soby
- CERN, Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | | | - L Verra
- CERN, Geneva, Switzerland.,University of Milan, Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C P Welsch
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - B Williamson
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | | | | | - G Xia
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
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16
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De Antonio M, Lupon J, Gavidia-Bovadilla G, Lopez-Ayerbe J, Moliner P, Domingo M, Ferrer E, Perera A, Nunez J, Zamora E, Vallejo N, Gual F, Teis A, Junca G, Bayes-Genis A. P5656Heart failure with preserved ejection fraction (HFpEF) infrequently evolves towards a HFpEF-declined phenotype. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M De Antonio
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - J Lupon
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | | | - J Lopez-Ayerbe
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - P Moliner
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - M Domingo
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - E Ferrer
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - A Perera
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | - J Nunez
- Universitat Politècnica de Catalunya, Barcelona, Spain
| | - E Zamora
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - N Vallejo
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - F Gual
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - A Teis
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - G Junca
- Germans Trias i Pujol University Hospital, Badalona, Spain
| | - A Bayes-Genis
- Germans Trias i Pujol University Hospital, Badalona, Spain
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17
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Clutton J, Hodgson P, Perera A. Hypovitaminosis D, a causative factor in fractures of the fifth metatarsal? Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.027] [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: 11/24/2022]
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18
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Varona MA, Soriano A, Aguirre-Jaime A, Garrido S, Oton E, Diaz D, Portero J, Bravo P, Barrera MA, Perera A. Risk factors of hepatocellular carcinoma recurrence after liver transplantation: accuracy of the alpha-fetoprotein model in a single-center experience. Transplant Proc 2015; 47:84-9. [PMID: 25645778 DOI: 10.1016/j.transproceed.2014.12.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [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: 12/11/2022]
Abstract
BACKGROUND Recurrence of hepatocellular carcinoma (HCC) and cirrhosis after a liver transplantation (LT) is a major concern, and a strict Milan criteria selection of candidates does not accurately discriminate the relapse rate after LT. PURPOSE This study sought to analyze the risk factors affecting tumor recurrence after LT for related cirrhosis HCC and the application of the French prognostic model (preLT alpha-fetoprotein [AFP], size, number) in a single center. METHODS In a retrospective observational study of LT for HCC and cirrhosis, clinicopathological features were analyzed. Also, the preoperative and postoperative AFP model score was calculated with a cutoff of 2. RESULTS Of 480, 109 patients underwent cadaveric LT for HCC. Eight of them had a relapse (7%). High AFP level, AFP model score >2, high pathological tumor-node-metastasis (pTNM) stage, poor differentiation, macrovascular-microvascular invasion, infiltration, and R1 margin were statistically significant (P < .05) for recurrence. Also, in the preoperative model, AFP score >2 was a predictor of worse survival (1-, 3-, 5-, 10-year survival of 81%, 51%, 30%, 30% vs 90%, 76%, 73%, 69% in ≤2, with P = .005). Regarding the postoperative model, similar results were found (1-, 3-, 5-, 10-year survival of 84%, 47%, 37%, 37% vs 90%, 78%, 73%, 52%, P = .028) between AFP model score >2 and ≤2, respectively. However, Milan and up-to-7 criteria were not accurate in recurrence nor in survival. CONCLUSIONS The French AFP model has proven to be a more discerning prognostic tool than other established criteria in the prediction of recurrence and survival. Also, in postoperative prognosis, pathological risk factors for relapse such as pTNM, differentiation grade, macrovascular-microvascular invasion, infiltration, and R1 margin have been predictors of recurrence.
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Affiliation(s)
- M A Varona
- Department of Surgery, Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain.
| | - A Soriano
- Department of Surgery, Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
| | - A Aguirre-Jaime
- Investigation Unit, Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
| | - S Garrido
- Department of Radiology/Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
| | - E Oton
- Department of Hepatology/Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
| | - D Diaz
- Department of Hepatology/Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
| | - J Portero
- Department of Vascular Radiology, Crta. El Rosario, no. 145, 38010, S/C de Tenerife, Spain
| | - P Bravo
- Department of Anesthesiology/Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
| | - M A Barrera
- Department of Surgery, Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
| | - A Perera
- Department of Pathology/Hospital Universitario Nuestra Sra. De Candelaria, S/C de Tenerife, Spain
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Wagner M, Steinbacher J, Kraus TFJ, Michalakis S, Hackner B, Pfaffeneder T, Perera A, Müller M, Giese A, Kretzschmar HA, Carell T. Age-dependent levels of 5-methyl-, 5-hydroxymethyl-, and 5-formylcytosine in human and mouse brain tissues. Angew Chem Int Ed Engl 2015; 54:12511-4. [PMID: 26137924 PMCID: PMC4643189 DOI: 10.1002/anie.201502722] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/13/2015] [Indexed: 12/25/2022]
Abstract
The absolute levels of 5-hydroxymethylcytosine (hmC) and 5-methylcytosine (mC) in human brain tissues at various ages were determined. Additionally, absolute levels of 5-formylcytosine (fC) in adult individuals and cytosine modification levels in sorted neurons were quantified. These data were compared with age-related fC, hmC, and mC levels in mouse brain samples. For hmC, an initial steady increase is observed, which levels off with age to a final steady-state value of 1.2 % in human brain tissue. This level is nearly twice as high as in mouse cerebral cortex. In contrast, fC declines rapidly with age during early developmental stages, thus suggesting that while hmC is a stable epigenetic mark, fC is more likely an intermediate of active DNA demethylation during early brain development. The trends in global cytosine modification dynamics during the lifespan of an organism are conserved between humans and mice and show similar patterns in different organs.
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Affiliation(s)
- Mirko Wagner
- Center for Integrated Protein Science at the Department of Chemistry, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany) E-mail:
| | - Jessica Steinbacher
- Center for Integrated Protein Science at the Department of Chemistry, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany) E-mail:
| | - Theo F J Kraus
- Center for Neuropathology and Prion Research (ZNP), Ludwig-Maximilians-Universität MünchenFeodor-Lynen-Str. 28, 81377 Munich (Germany)
| | - Stylianos Michalakis
- Center for Integrated Protein Science at the Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany)
| | - Benjamin Hackner
- Center for Integrated Protein Science at the Department of Chemistry, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany) E-mail:
| | - Toni Pfaffeneder
- Center for Integrated Protein Science at the Department of Chemistry, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany) E-mail:
| | - Arshan Perera
- Center for Integrated Protein Science at the Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany)
| | - Markus Müller
- Center for Integrated Protein Science at the Department of Chemistry, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany) E-mail:
| | - Armin Giese
- Center for Neuropathology and Prion Research (ZNP), Ludwig-Maximilians-Universität MünchenFeodor-Lynen-Str. 28, 81377 Munich (Germany)
| | - Hans A Kretzschmar
- Center for Neuropathology and Prion Research (ZNP), Ludwig-Maximilians-Universität MünchenFeodor-Lynen-Str. 28, 81377 Munich (Germany)
| | - Thomas Carell
- Center for Integrated Protein Science at the Department of Chemistry, Ludwig-Maximilians-Universität MünchenButenandtstr. 5-13, 81377 Munich (Germany) E-mail:
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Wagner M, Steinbacher J, Kraus TFJ, Michalakis S, Hackner B, Pfaffeneder T, Perera A, Müller M, Giese A, Kretzschmar HA, Carell T. Altersabhängige Level von 5-Methyl-, 5-Hydroxymethyl- und 5-Formylcytosin in Hirngeweben des Menschen und der Maus. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502722] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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21
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Sarduy MR, García I, Coca MA, Perera A, Torres LA, Valenzuela CM, Baladrón I, Solares M, Reyes V, Hernández I, Perera Y, Martínez YM, Molina L, González YM, Ancízar JA, Prats A, González L, Casacó CA, Acevedo BE, López-Saura PA, Alonso DF, Gómez R, Perea-Rodríguez SE. Optimizing CIGB-300 intralesional delivery in locally advanced cervical cancer. Br J Cancer 2015; 112:1636-43. [PMID: 25880012 PMCID: PMC4430720 DOI: 10.1038/bjc.2015.137] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/17/2015] [Accepted: 03/19/2015] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND We conducted a phase 1 trial in patients with locally advanced cervical cancer by injecting 0.5 ml of the CK2-antagonist CIGB-300 in two different sites on tumours to assess tumour uptake, safety, pharmacodynamic activity and identify the recommended dose. METHODS Fourteen patients were treated with intralesional injections containing 35 or 70 mg of CIGB-300 in three alternate cycles of three consecutive days each before standard chemoradiotherapy. Tumour uptake was determined using (99)Tc-radiolabelled peptide. In situ B23/nucleophosmin was determined by immunohistochemistry. RESULTS Maximum tumour uptake for CIGB-300 70-mg dose was significantly higher than the one observed for 35 mg: 16.1 ± 8.9 vs 31.3 ± 12.9 mg (P = 0.01). Both, AUC24h and biological half-life were also significantly higher using 70 mg of CIGB-300 (P < 0.001). Unincorporated CIGB-300 diffused rapidly to blood and was mainly distributed towards kidneys, and marginally in liver, lungs, heart and spleen. There was no DLT and moderate allergic-like reactions were the most common systemic side effect with strong correlation between unincorporated CIGB-300 and histamine levels in blood. CIGB-300, 70 mg, downregulated B23/nucleophosmin (P = 0.03) in tumour specimens. CONCLUSION Intralesional injections of 70 mg CIGB-300 in two sites (0.5 ml per injection) and this treatment plan are recommended to be evaluated in phase 2 studies.
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Affiliation(s)
- M R Sarduy
- Gynecological service, Center for Medical-Surgical Research, Havana 11300, Cuba
| | - I García
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - M A Coca
- Direction for Clinical Research, Clinical Investigation Center, Havana 11300, Cuba
| | - A Perera
- Direction for Clinical Research, Clinical Investigation Center, Havana 11300, Cuba
| | - L A Torres
- Direction for Clinical Research, Clinical Investigation Center, Havana 11300, Cuba
| | - C M Valenzuela
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - I Baladrón
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - M Solares
- Gyneco-obstetric Hospital ‘Ramón González Coro', Havana 10400, Cuba
| | - V Reyes
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - I Hernández
- Deparment of Development, Isotope Center (CENTIS), Havana 11100, Cuba
| | - Y Perera
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - Y M Martínez
- Gynecological service, Center for Medical-Surgical Research, Havana 11300, Cuba
| | - L Molina
- Gynecological service, Center for Medical-Surgical Research, Havana 11300, Cuba
| | - Y M González
- Gynecological service, Center for Medical-Surgical Research, Havana 11300, Cuba
| | - J A Ancízar
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - A Prats
- Direction for Clinical Research, Clinical Investigation Center, Havana 11300, Cuba
| | - L González
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - C A Casacó
- Direction for Clinical Research, Clinical Investigation Center, Havana 11300, Cuba
| | - B E Acevedo
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - P A López-Saura
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
| | - D F Alonso
- Molecular Oncology Laboratory, National University of Quilmes, Buenos Aires, Argentina
| | - R Gómez
- ELEA Laboratories, Buenos Aires, Argentina
| | - S E Perea-Rodríguez
- CIGB-300 Research and Development Group, Laboratory of Molecular Oncology, Biomedical Research Department, Center for Genetic Engineering and Biotechnology (CIGB), Avenue 31 b/158 and 190, Cubanacán, Playa, PO Box 6162, Havana 11300, Cuba
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Perera A, Perera C, Karunanayake A. Effectiveness of early stretching exercises for the quality of recovery of the upper limb in burnt patients. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.2119] [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: 10/23/2022]
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23
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Farinelli P, Perera A, Arango-Gonzalez B, Trifunovic D, Wagner M, Carell T, Biel M, Zrenner E, Michalakis S, Paquet-Durand F, Ekström PAR. DNA methylation and differential gene regulation in photoreceptor cell death. Cell Death Dis 2014; 5:e1558. [PMID: 25476906 PMCID: PMC4649831 DOI: 10.1038/cddis.2014.512] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 10/17/2014] [Accepted: 10/21/2014] [Indexed: 01/09/2023]
Abstract
Retinitis pigmentosa (RP) defines a group of inherited degenerative retinal diseases causing progressive loss of photoreceptors. To this day, RP is still untreatable and rational treatment development will require a thorough understanding of the underlying cell death mechanisms. Methylation of the DNA base cytosine by DNA methyltransferases (DNMTs) is an important epigenetic factor regulating gene expression, cell differentiation, cell death, and survival. Previous studies suggested an involvement of epigenetic mechanisms in RP, and in this study, increased cytosine methylation was detected in dying photoreceptors in the rd1, rd2, P23H, and S334ter rodent models for RP. Ultrastructural analysis of photoreceptor nuclear morphology in the rd1 mouse model for RP revealed a severely altered chromatin structure during retinal degeneration that coincided with an increased expression of the DNMT isozyme DNMT3a. To identify disease-specific differentially methylated DNA regions (DMRs) on a genomic level, we immunoprecipitated methylated DNA fragments and subsequently analyzed them with a targeted microarray. Genome-wide comparison of DMRs between rd1 and wild-type retina revealed hypermethylation of genes involved in cell death and survival as well as cell morphology and nervous system development. When correlating DMRs with gene expression data, we found that hypermethylation occurred alongside transcriptional repression. Consistently, motif analysis showed that binding sites of several important transcription factors for retinal physiology were hypermethylated in the mutant model, which also correlated with transcriptional silencing of their respective target genes. Finally, inhibition of DNMTs in rd1 organotypic retinal explants using decitabine resulted in a substantial reduction of photoreceptor cell death, suggesting inhibition of DNA methylation as a potential novel treatment in RP.
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Affiliation(s)
- P Farinelli
- 1] Division of Ophthalmology, Department of Clinical Sciences, University of Lund, BMC-B11, Lund 22184, Sweden [2] Division of Experimental Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tübingen 72076, Germany
| | - A Perera
- Center for Integrated Protein Science Munich (CIPSM) at the Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | - B Arango-Gonzalez
- Division of Experimental Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tübingen 72076, Germany
| | - D Trifunovic
- Division of Experimental Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tübingen 72076, Germany
| | - M Wagner
- Center for Integrated Protein Science Munich (CIPSM) at the Department of Chemistry, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | - T Carell
- Center for Integrated Protein Science Munich (CIPSM) at the Department of Chemistry, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | - M Biel
- Center for Integrated Protein Science Munich (CIPSM) at the Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | - E Zrenner
- Division of Experimental Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tübingen 72076, Germany
| | - S Michalakis
- Center for Integrated Protein Science Munich (CIPSM) at the Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | - F Paquet-Durand
- Division of Experimental Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tübingen 72076, Germany
| | - P A R Ekström
- Division of Ophthalmology, Department of Clinical Sciences, University of Lund, BMC-B11, Lund 22184, Sweden
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Jorge F, Perera A, Roca V, Carretero MA, Harris DJ, Poulin R. Evolution of alternative male morphotypes in oxyurid nematodes: a case of convergence? J Evol Biol 2014; 27:1631-43. [DOI: 10.1111/jeb.12430] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 04/16/2014] [Indexed: 11/29/2022]
Affiliation(s)
- F. Jorge
- CIBIO Research Centre in Biodiversity and Genetic Resources, InBIO; Universidade do Porto; Vairão Portugal
- Departamento de Biologia; Faculdade de Ciências da Universidade do Porto; Porto Portugal
- Department of Zoology; University of Otago; Dunedin New Zealand
| | - A. Perera
- CIBIO Research Centre in Biodiversity and Genetic Resources, InBIO; Universidade do Porto; Vairão Portugal
| | - V. Roca
- Departament de Zoologia; Facultat de Ciències Biològiques; Universitat de València; València Spain
| | - M. A. Carretero
- CIBIO Research Centre in Biodiversity and Genetic Resources, InBIO; Universidade do Porto; Vairão Portugal
| | - D. J. Harris
- CIBIO Research Centre in Biodiversity and Genetic Resources, InBIO; Universidade do Porto; Vairão Portugal
| | - R. Poulin
- Department of Zoology; University of Otago; Dunedin New Zealand
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Guillo S, Bauer T, Lee JW, Takao M, Kong SW, Stone JW, Mangone PG, Molloy A, Perera A, Pearce CJ, Michels F, Tourné Y, Ghorbani A, Calder J. Consensus in chronic ankle instability: aetiology, assessment, surgical indications and place for arthroscopy. Orthop Traumatol Surg Res 2013; 99:S411-9. [PMID: 24268842 DOI: 10.1016/j.otsr.2013.10.009] [Citation(s) in RCA: 174] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 10/09/2013] [Indexed: 02/02/2023]
Abstract
Ankle sprains are the most common injuries sustained during sports activities. Most ankle sprains recover fully with non-operative treatment but 20-30% develop chronic ankle instability. Predicting which patients who sustain an ankle sprain will develop instability is difficult. This paper summarises a consensus on identifying which patients may require surgery, the optimal surgical intervention along with treatment of concomitant pathology given the evidence available today. It also discusses the role of arthroscopic treatment and the anatomical basis for individual procedures.
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Affiliation(s)
- S Guillo
- Clinique du Sport, 33300 Mérignac, France
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Arranz SE, Avarre JC, Balasundaram C, Bouza C, Calcaterra NB, Cezilly F, Chen SL, Cipriani G, Cruz VP, D'Esposito D, Daniel C, Dejean A, Dharaneedharan S, Díaz J, Du M, Durand JD, Dziadek J, Foresti F, Peng-cheng F, Gao QB, García G, Gauffre-Autelin P, Giovino A, Goswami M, Guarino C, Guerra-Varela J, Gutiérrez V, Harris DJ, Heo MS, Khan G, Kim M, Lakra WS, Lauth J, Leclercq P, Lee J, Lee SH, Lee S, Lee T, Li YH, Liu H, Liu S, Malé PJG, Mandhan RP, Martinez P, Mayer VE, Mendel J, Mendes NJ, Mendonça FF, Minias A, Minias P, Oh KS, Oliveira C, Orivel J, Orsini L, Pardo BG, Perera A, Procaccini G, Rato C, Ríos N, Scibetta S, Sharma BS, Sierens T, Singh A, Terer T, Triest L, Urbánková S, Vera M, Villanova GV, Voglmayr H, Vyskočilová M, Wang H, Wang JL, Wattier RA, Xing R, Yadav K, Yin G, Yuan Y, Yun JC, Zhang FQ, Zhang JH, Zhuang Z. Permanent genetic resources added to molecular ecology resources database 1 December 2012-31 January 2013. Mol Ecol Resour 2013; 13:546-9. [PMID: 23521844 DOI: 10.1111/1755-0998.12095] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This article documents the addition of 268 microsatellite marker loci to the Molecular Ecology Resources Database. Loci were developed for the following species: Alburnoides bipunctatus, Chamaerops humilis, Chlidonias hybrida, Cyperus papyrus, Fusarium graminearum, Loxigilla barbadensis, Macrobrachium rosenbergii, Odontesthes bonariensis, Pelteobagrus vachelli, Posidonia oceanica, Potamotrygon motoro, Rhamdia quelen, Sarotherodon melanotheron heudelotii, Sibiraea angustata, Takifugu rubripes, Tarentola mauritanica, Trimmatostroma sp. and Wallago attu. These loci were cross-tested on the following species: Alburnoides fasciatus, Alburnoides kubanicus, Alburnoides maculatus, Alburnoides ohridanus, Alburnoides prespensis, Alburnoides rossicus, Alburnoides strymonicus, Alburnoides thessalicus, Alburnoides tzanevi, Carassius carassius, Fusarium asiaticum, Leucaspius delineatus, Loxigilla noctis dominica, Pelecus cultratus, Phoenix canariensis, Potamotrygon falkneri, Trachycarpus fortune and Vimba vimba.
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Affiliation(s)
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- Molecular Ecology Resources Editorial Office, Vancouver, BC, V6T 1Z4, Canada.
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Rato C, Carranza S, Perera A, Harris D. Evolutionary patterns of the mitochondrial genome in the Moorish gecko, Tarentola mauritanica. Gene 2013; 512:166-73. [DOI: 10.1016/j.gene.2012.09.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 05/04/2012] [Accepted: 09/05/2012] [Indexed: 02/06/2023]
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Patel SD, Perera A, Law N, Mandumula S. Case report. A novel approach to the management of a ruptured Type II endoleak following endovascular repair of an internal iliac artery aneurysm. Br J Radiol 2012; 84:e240-2. [PMID: 22101591 DOI: 10.1259/bjr/42137038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Endovascular repair of isolated iliac artery aneurysms is an established safe and effective management option. Type II endoleak is a potential complication, but rarely results in significant morbidity or mortality. We report a case of a patient who presented with a ruptured internal iliac artery aneurysm secondary to a Type II endoleak. To our knowledge this and the following method of managing this have not been previously reported. Established methods of managing endoleaks, such as intravascular transfemoral embolisation and open or laparoscopic ligation, were not possible. Therefore, we resorted to a novel approach to this type of aneurysm and successfully performed a transcutaneous direct puncture and embolisation of the superior gluteal artery.
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Affiliation(s)
- S D Patel
- Department of Vascular Surgery, Chase Farm Hospital, Enfield, London, UK.
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Mijaković M, Kežić B, Zoranić L, Sokolić F, Asenbaum A, Pruner C, Wilhelm E, Perera A. Ethanol-water mixtures: ultrasonics, Brillouin scattering and molecular dynamics. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.06.009] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Shaul K, Schultz A, Perera A, Kofke D. Integral-equation theories and Mayer-sampling Monte Carlo: a tandem approach for computing virial coefficients of simple fluids. Mol Phys 2011. [DOI: 10.1080/00268976.2011.615764] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Tinker N, Perera A, Sharma H, Mcauliffe C. Synthesis of 195mpT labelled cis-diammine(1,1-cyclobutanedicarboxylate) platinum (II), an active anti-tumour drug, and its use in metabolic investigations. J Labelled Comp Radiopharm 2011. [DOI: 10.1002/jlcr.25802601158] [Citation(s) in RCA: 4] [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: 11/07/2022]
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Fonollosa J, Gutierrez-Galvez A, Lansner A, Martinez D, Rospars J, Beccherelli R, Perera A, Pearce T, Vershure P, Persaud K, Marco S. Biologically Inspired Computation for Chemical Sensing. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.procs.2011.09.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Perera A, Meda V, Tyler R. Resistant starch: A review of analytical protocols for determining resistant starch and of factors affecting the resistant starch content of foods. Food Res Int 2010. [DOI: 10.1016/j.foodres.2010.06.003] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Rato C, Carranza S, Perera A, Carretero M, Harris D. Conflicting patterns of nucleotide diversity between mtDNA and nDNA in the Moorish gecko, Tarentola mauritanica. Mol Phylogenet Evol 2010; 56:962-71. [DOI: 10.1016/j.ympev.2010.04.033] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Revised: 04/16/2010] [Accepted: 04/23/2010] [Indexed: 10/19/2022]
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Perera A, Baker JF, Lui DF, Stephens MM. The management and outcome of lateral process fracture of the talus. Foot Ankle Surg 2010; 16:15-20. [PMID: 20152749 DOI: 10.1016/j.fas.2009.03.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Revised: 03/20/2009] [Accepted: 03/31/2009] [Indexed: 02/04/2023]
Abstract
BACKGROUND Lateral process fractures of the talus are a rare injury with significant associated morbidity when missed. Only a small number of case series' and reports are available and the appropriate management of these fractures is not really known. METHODS We reviewed available English language literature for reports and series of lateral process fractures of talus. Only papers in which the classification of fracture, management and outcome were clear were included in our analyses. RESULTS 109 Cases in total were identified including four cases from a personal series. 50 Type I, 17 type II and 29 type III fractures were analysed. A significant number of patients required late surgery when the diagnosis was initially missed. CONCLUSION Type I fractures are best treated with ORIF, type II with excision and type III with casting. Fractures presenting late that are not united should be excised if small and internally fixed if large.
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Affiliation(s)
- A Perera
- Cappagh National Orthopaedic Hospital, Cappagh Road, Finglas, Dublin 21, Ireland
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Kiely PD, Baker JF, Lim Fat D, Perera A, Colgan G, Awan N. The neutral injured ankle: is the Achilles tendon intact? Arch Emerg Med 2009. [DOI: 10.1136/emj.2009.082081t] [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: 11/03/2022]
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39
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Varona MA, Del Pino JM, Barrera M, Arranz J, Hernández BM, Perez HF, Padilla J, Fuentes JS, Aguirre A, Mendez S, Sanz P, Gianchandani R, Perera A, Soriano A. Hepatocellular carcinoma and liver transplantation: a 12-year experience. Transplant Proc 2009; 41:1005-8. [PMID: 19376411 DOI: 10.1016/j.transproceed.2009.02.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Orthotopic liver transplantation (OLT) for patients with cirrhosis and concomitant hepatocellular carcinoma (HCC) in early stages is the treatment of choice, with an acceptable recurrence rate and excellent survival. AIM We sought to evaluate (1) the accuracy of preoperative imaging; (2) the impact of pre-OLT treatments on survival and recurrence; and (3) the influence of beyond Milan criteria selection on global outcomes. METHODS We studied a cohort of 65 patients with HCC among 300 consecutive OLTs over a single 12-year experience. We analyzed the overall outcomes of survival and recurrence, the accuracy of preoperative diagnosis and staging the influence of neoadjuvant treatment prior to OLT, and the effect on overall outcomes beyond the Milan criteria in our series. RESULTS The 65 transplants were performed for HCC, mostly in association with hepatitis C virus and alcoholic cirrhosis with HTP. At a mean follow-up of 40.32 months, the recurrence rate was 5.7% among the 61 HCC confirmed by histopathology. The overall survival was 30.07. Actuarial survivals at 1, 5, and 10 years were 82%, 77%, and 62%, respectively. Six retransplants occurred among the seven graft losses albeit with poor survival after the second graft. Most explants showed low pTNM stages with favorable microscopic features. Preoperative imaging tests failed to achieve an accurate diagnosis in 15.38% of the series. The role of alpha-fetoprotein (AFP) and hepatic biopsy was irrelevant. Unfavorable histopathologic factors predicted a greater recurrence rate, but had no influence on survival. Neither recurrence nor survival were modified by pre-OLT therapy. CONCLUSIONS In our series, AFP, hepatic biopsy, and pre-OLT treatment had limited roles. Radiological imaging techniques underestimated HCC staging and lead to a misdiagnosis to an expected degree. Despite these findings, this single institution experience with OLT for HCC showed excellent survivals with a low recurrence rate including cases of patients beyond the Milan criteria.
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Affiliation(s)
- M A Varona
- Department of Surgery, Universitary Hospital of Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain.
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Baker JF, Perera A, Lui DF, Stephens MM. The effect of body mass index on outcomes after total ankle replacement. Ir Med J 2009; 102:188-190. [PMID: 19722359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Total ankle replacement is an established alternative to ankle fusion in selected patients. One of the possible exclusions used is the presence of a high BMI. This is based on our experience with hip and knee replacements where poor outcomes have been associated with obesity, however little work has been done on this subject in the ankle. We report the first series solely focussing on the impact of BMI on TAR. Forty five consecutive patients were identified and followed up using the SF-36 and VAS-FA. All patients had their BMI collected prospectively and BMI at latest follow-up was calculated. There was an average 5-year follow-up with just 9 (20%) lost to follow-up. At final follow-up 8 (17.7%) patients were deceased, none of the deaths were attributable to their previous ankle surgery. We did not find an association between high BMI and reduced outcomes or need for secondary surgery. In addition there was no significant change in BMI after surgery.
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Affiliation(s)
- J F Baker
- Cappagh National Orthopaedic Hospital, Finglas, Dublin 11.
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41
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Brunel H, Perera A, Buil A, Sabater-Lleal M, Souto JC, Fontcuberta J, Vallverdu M, Soria JM, Caminal P. SNP sets selection under mutual information criterion, application to F7/FVII dataset. Annu Int Conf IEEE Eng Med Biol Soc 2009; 2008:3783-6. [PMID: 19163535 DOI: 10.1109/iembs.2008.4650032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
One of the main goals of human genetics is to find genetic markers related to complex diseases. In blood coagulation process, it is known that genetic variability in F7 gene is the most responsible for observed variations in FVII levels in blood. In this work, we propose a method for selecting sets of Single Nucleotide Polymorphisms (SNPs) significantly correlated with a phenotype (FVII levels). This method employs a feature selection algorithm (variant of Sequential Forward Selection, SFS) based on a criterion of statistical significance of a mutual information functional. This algorithm is applied to a sample of independent individuals from the GAIT project. Main SNPs found by the algorithm are in correspondence with previous results published using family-based techniques.
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Affiliation(s)
- H Brunel
- Institut de Bioenginyeria de Catalunya, Centre de Recerca en Enginyeria Biomédica, Departament de Enginyeria, de Sistemes, Automàtica i Informàtica industrial, Universitat Politcénica de Catalunya, Pau Gargallo 5, Barcelona, Spain.
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Perera A, Vallverdu M, Claria F, Soria JM, Caminal P. DNA binding site characterization by means of Rényi entropy measures on nucleotide transitions. IEEE Trans Nanobioscience 2008; 7:133-41. [PMID: 18556261 DOI: 10.1109/tnb.2008.2000744] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In this work, parametric information-theory measures for the characterization of binding sites in DNA are extended with the use of transitional probabilities on the sequence. We propose the use of parametric uncertainty measures such as Rényi entropies obtained from the transition probabilities for the study of the binding sites, in addition to nucleotide frequency-based Rényi measures. Results are reported in this work comparing transition frequencies (i.e., dinucleotides) and base frequencies for Shannon and parametric Rényi entropies for a number of binding sites found in E. Coli, lambda and T7 organisms. We observe that the information provided by both approaches is not redundant. Furthermore, under the presence of noise in the binding site matrix we observe overall improved robustness of nucleotide transition-based algorithms when compared with nucleotide frequency-based method.
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Affiliation(s)
- A Perera
- Centre for Biomedical Engineering Research, Technical University of Catalonia, Barcelona, Spain.
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Lotrich V, Flocke N, Ponton M, Yau AD, Perera A, Deumens E, Bartlett RJ. Parallel implementation of electronic structure energy, gradient, and Hessian calculations. J Chem Phys 2008; 128:194104. [PMID: 18500853 DOI: 10.1063/1.2920482] [Citation(s) in RCA: 143] [Impact Index Per Article: 8.9] [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] Open
Abstract
ACES III is a newly written program in which the computationally demanding components of the computational chemistry code ACES II [J. F. Stanton et al., Int. J. Quantum Chem. 526, 879 (1992); [ACES II program system, University of Florida, 1994] have been redesigned and implemented in parallel. The high-level algorithms include Hartree-Fock (HF) self-consistent field (SCF), second-order many-body perturbation theory [MBPT(2)] energy, gradient, and Hessian, and coupled cluster singles, doubles, and perturbative triples [CCSD(T)] energy and gradient. For SCF, MBPT(2), and CCSD(T), both restricted HF and unrestricted HF reference wave functions are available. For MBPT(2) gradients and Hessians, a restricted open-shell HF reference is also supported. The methods are programed in a special language designed for the parallelization project. The language is called super instruction assembly language (SIAL). The design uses an extreme form of object-oriented programing. All compute intensive operations, such as tensor contractions and diagonalizations, all communication operations, and all input-output operations are handled by a parallel program written in C and FORTRAN 77. This parallel program, called the super instruction processor (SIP), interprets and executes the SIAL program. By separating the algorithmic complexity (in SIAL) from the complexities of execution on computer hardware (in SIP), a software system is created that allows for very effective optimization and tuning on different hardware architectures with quite manageable effort.
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Affiliation(s)
- V Lotrich
- Aces QC, Gainesville, Florida 32605, USA
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Alvarez H, Castro C, Moujir L, Perera A, Delgado A, Soriano I, Evora C, Sánchez E. Efficacy of ciprofloxacin implants in treating experimental osteomyelitis. J Biomed Mater Res B Appl Biomater 2008; 85:93-104. [PMID: 17696153 DOI: 10.1002/jbm.b.30921] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [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: 11/11/2022]
Abstract
Ciprofloxacin (CFX) implants containing poly(D,L-lactide) and calcium phosphates (tricalcium phosphate and hydroxyapatite) was evaluated in 50 rabbits in an experimental osteomyelitis model. Their femoral cavity was inoculated with Staphylococcus aureus. After 2 weeks, the infected focus was cleaned out and the delivery system implanted. The infection and subsequent response to treatment were evaluated by microbiological analysis, biochemical and hematological markers, body weight, temperature, clinical signs, X-rays, and histology. Infected bone cultures, treated with CFX implants, showed reduced bacterial growth against controls. All CFX was released within 6 weeks. All animals recovered within 4 weeks. Even 12 weeks after implantation, no recurrence of infection was observed. Serum C-reactive protein, platelet, and leukocyte levels increased in all animals before treatment, and 4 weeks after it were maintained or rose in control animals, while decreased to normal levels in treated ones. Body weight was characterized by pretreatment losses, then gains during recuperation, or further loss in untreated animals; with no significant intraindividual differences in body temperature. Body weight, leucocytes, platelets, and C-reactive protein turned out to be highly useful markers for monitoring this kind of infection and its treatment. CFX implants demonstrated to be an effective therapy for S. aureus bone infection. Their efficacy was also reflected in decreasing severity of clinical signs, nonprogress of radiological signs indicative of infection, and good integration into bone structure. Histological examination revealed repair, with new bone formation extending into implants.
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Affiliation(s)
- H Alvarez
- Traumatology Service, Hospitén Rambla, Tenerife, Spain
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Almásy L, Turmine M, Perera A. Structure of Aqueous Solutions of Ionic Liquid 1-Butyl-3-methylimidazolium Tetrafluoroborate by Small-Angle Neutron Scattering. J Phys Chem B 2008; 112:2382-7. [DOI: 10.1021/jp076185e] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- L. Almásy
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland, Laboratoire d'Electrochimie et de Chimie Analytique (UMR CNRS 7575), Université Pierre et Marie Curie, 4 Place Jussieu, F75252, Paris cedex 05, France, and Laboratoire de Physique Théorique de la Matière Condensée (UMR CNRS 7600), Université Pierre et Marie Curie, 4 Place Jussieu, F75252, Paris cedex 05, France
| | - M. Turmine
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland, Laboratoire d'Electrochimie et de Chimie Analytique (UMR CNRS 7575), Université Pierre et Marie Curie, 4 Place Jussieu, F75252, Paris cedex 05, France, and Laboratoire de Physique Théorique de la Matière Condensée (UMR CNRS 7600), Université Pierre et Marie Curie, 4 Place Jussieu, F75252, Paris cedex 05, France
| | - A. Perera
- Department of Engineering Physics and Mathematics, and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FI-02015 HUT, Espoo, Finland, Laboratoire d'Electrochimie et de Chimie Analytique (UMR CNRS 7575), Université Pierre et Marie Curie, 4 Place Jussieu, F75252, Paris cedex 05, France, and Laboratoire de Physique Théorique de la Matière Condensée (UMR CNRS 7600), Université Pierre et Marie Curie, 4 Place Jussieu, F75252, Paris cedex 05, France
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Abstract
The Kirkwood-Buff integrals of some binary aqueous alcohol mixtures are computed from the available vapor pressure measurements and compared with previous results as well as small angle neutron scattering experiments. The emphasis of the present report is on accuracy of the results that can be achieved by these two different types of measurements. This seems to be needed, mainly in view of the discrepancies between the various published results, as shown herein. It is argued that agreement in peak positions is more important than that in magnitude. In general, very good agreement is obtained by both methods, and sources of disagreements are discussed. The issue of the computer simulations of aqueous systems and the problematics related to correlations, microheterogeneity, and consequently the Kirkwood-Buff integrals are equally discussed herein.
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Affiliation(s)
- A Perera
- Laboratoire de Physique Théorique des Liquides (UMR CNRS 1600), Université Pierre et Marie Curie, 4 Place Jussieu, F75252 Paris Cedex 05, France.
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Elekes Z, Dombrádi Z, Aoi N, Bishop S, Fülöp Z, Gibelin J, Gomi T, Hashimoto Y, Imai N, Iwasa N, Iwasaki H, Kalinka G, Kondo Y, Korsheninnikov AA, Kurita K, Kurokawa M, Matsui N, Motobayashi T, Nakamura T, Nakao T, Nikolskii EY, Ohnishi TK, Okumura T, Ota S, Perera A, Saito A, Sakurai H, Satou Y, Sohler D, Sumikama T, Suzuki D, Suzuki M, Takeda H, Takeuchi S, Togano Y, Yanagisawa Y. Spectroscopic study of neutron shell closures via nucleon transfer in the near-dripline nucleus 23O. Phys Rev Lett 2007; 98:102502. [PMID: 17358526 DOI: 10.1103/physrevlett.98.102502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2006] [Indexed: 05/14/2023]
Abstract
Neutron single particle energies have been measured in 23O using the 22O(d,p)23O*-->22O+n process. The energies of the resonant states have been deduced to be 4.00(2) MeV and 5.30(4) MeV. The first excited state can be assigned to the nu d3/2 single particle state from a comparison with shell model calculations. The measured 4.0 MeV energy difference between the nu s1/2 and nu d3/2 states gives the size of the N=16 shell gap which is in agreement with the recent USD05 ("universal" sd from 2005) shell model calculation, and is large enough to explain the unbound nature of the oxygen isotopes heavier than A=24. The resonance detected at 5.3 MeV can be assigned to a state out of the sd shell model space. Its energy corresponds to a approximately 1.3 MeV sized N=20 shell gap, therefore, the N=20 shell closure disappears at Z=8 in agreement with Monte Carlo shell model calculations using SDPF-M interaction.
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Affiliation(s)
- Z Elekes
- Institute of Nuclear Research of the Hungarian Academy of Sciences, P.O. Box 51, Debrecen, H-4001, Hungary
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Jackson H, McAuliffe CA, Perera A, Sharma HL, Tinker NJ. An improved synthetic procedure for the preparation of 195mPt labelled anti-tumour complexes. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580291004] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
The Kirkwood-Buff integrals of acetone-water mixtures are determined using two experimental techniques: small-angle neutron scattering and vapor pressure measurements, in order to test the precision and reliability that can be achieved. The data are then compared with those previously reported by different authors, which tend to show considerable variation between them. The various possible sources of inaccuracies are pointed out, both from experimental origins and from the numerical treatment of the data. Comparison with recent simulation results allows to critically compare different models and provide some information about the microstructure of the aqueous mixture.
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Affiliation(s)
- A Perera
- Laboratoire de Physique Théorique des Liquides, UMR Centre National de la Recherche Scientifique (CNRS) 1600, Université Pierre et Marie Curie, 4 Place Jussieu, F75252, Paris Cedex 05, France.
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50
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Castro C, Sánchez E, Delgado A, Soriano I, Núñez P, Baro M, Perera A, Evora C. Ciprofloxacin implants for bone infection. In vitro-in vivo characterization. J Control Release 2004; 93:341-54. [PMID: 14644584 DOI: 10.1016/j.jconrel.2003.09.004] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
To elucidate the antibiotic release mechanism from implants composed of calcium phosphates (hydroxyapatite [HAP] and tricalcium phosphate [TCP]), 30 kDa poly(DL-lactide) (PLA-30) and ciprofloxacin (CFX), nine formulations were prepared. In vitro results show that the release rate decreased as compression load and PLA/phosphates ratio increased. In contrast, a slower percent release rate was observed with higher drug loading. Swelling-erosion-disintegration of the implants was observed during the release assays, due to CFX swelling. Two CFX implant formulations were selected for implantation in the femur of rabbits, according to in vitro results. The implant drug loads tested were 10% and 40% of CFX. The in vivo results showed that the antibiotic concentrations achieved throughout the femur were higher for 4 weeks than the minimum inhibitory concentrations (MIC) against the most common of the pathogens that cause osteomyelitis. The CFX-10% implant was considered the best formulation as CFX was totally released within 6 weeks, and therapeutic bone levels were achieved, and the histological and radiographic analyses showed the osteoconductive properties of the materials. All these results showed that CFX release is limited by its solubility, and the erosion-disintegration and bone ingrowth into the implants enhanced the antibiotic release.
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Affiliation(s)
- C Castro
- Departamento de Ingeniería Química y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de La Laguna, 38200, Spain
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