21 results on '"G. Balik"'
Search Results
2. Study of scintillation light collection, production and propagation in a 4 tonne dual-phase LArTPC
- Author
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P. Lutz, K. Sakashita, F. Dulucq, L. Periale, F. Noto, Kai Loo, N. Lira, Wladyslaw Henryk Trzaska, J. Marteau, Y. Karyotakis, D. Mladenov, G. Martin-Chassard, G. Lehmann-Miotto, Marzio Nessi, D. Lorca, J. Bremer, Enrique Calvo, M. Kurokawa, C. Regenfus, Antonio Ereditato, N. Geffroy, F. Duval, K. Fusshoeller, Ionel Lazanu, G. Brunetti, K. Negishi, C. Drancourt, A. Scarpelli, V. Toboaru, A. Tonazzo, F. Pietropaolo, T. Hasegawa, A. Gendotti, F. Vannucci, L. Zambelli, K. Nakayoshi, A. Gallego-Ros, F. Doizon, V. Aushev, T. Patzak, C. Cantini, J. Asaadi, E. Pennacchio, André Rubbia, J. Soto-Oton, I. Gil-Botella, L. Balleyguier, Masatoshi Maki, Denis Stanca, S. Bordoni, T. Viant, S. Horikawa, A. Chiriacescuf, A. Falcone, K. Sendai, S. Murphy, B. Aimard, A. Delbart, D. Caiulo, N. Bourgeois, S. Vilalte, B.M. Cautisanu, G. Maire, D. Stefan, L. Brunetti, I. Kreslo, S. Wu, Marc Weber, K. Cankocak, Mihai Niculescu-Oglinzanu, D. Redondo, J. Sinclair, Filippo Resnati, F. Sergiampietri, M. Parvu, D. Kryn, I. De Bonis, Animesh Chatterjee, B. Radics, B. Bourguille, Paolo Crivelli, C. de la Taille, M. Leyton, S. Bolognesi, P. Gorodetzky, Mario Campanelli, M. Calin, M. Chalifour, L. Aizawa, D. Pugnere, Alexandru Gherghel-Lascu, C. Alt, D. Duchesneau, Masahiro Ikeno, S. Shahsavarani, H. Konari, P. Cotte, J.V. Dawson, Federico Sanchez, Diana Navas-Nicolas, S. Jiménez, Y. Penichot, M. Zito, C. Girerd, L. Urda, A. Remoto, B. Carlus, C. M. Schloesser, Tomohisa Uchida, G. Brown, W. Tromeur, R. Sulej, E. Bechetoille, G. Misitano, Romul Margineanu, Masashi Tanaka, S. Conforti, C. Santos, Sampsa Vihonen, A. Verdugo, A. Saftoiu, H. Pessard, H. Mathez, P. Chiu, T.S. Mosu, R. Hanni, A.M. Blebea-Apostu, V. Galymov, Y. Onishchuk, E. Mazzucato, G. Vasseur, S. Narita, Y. Kuromori, Jukka Maalampi, Martin Auger, S. Di Luise, L. Molina Bueno, D. Autiero, A. Holin, S. Kasai, Nikolaos Charitonidis, M. Karolak, M. Shoji, A. Noury, Alexandru Jipa, G. Balik, P. Kunze, W. Mu, D. Belver, Jong-Sung Yu, C. Palomares, A. Chappuis, Katsuyu Kasami, C. Lastoria, M.C. Gomoiu, Thorsten Lux, Laura Manenti, E. Hamada, S. Emery, Alexandru Balaceanu, C. Cuesta, Oana Ristea, T. Kishishita, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Organisation de Micro-Électronique Générale Avancée (OMEGA), École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Aimard, B, Aizawa, L, Alt, C, Asaadi, J, Auger, M, Aushev, V, Autiero, D, Balaceanu, A, Balik, G, Balleyguier, L, Bechetoille, E, Belver, D, Blebea-Apostu, A, Bolognesi, S, Bordoni, S, Bourgeois, N, Bourguille, B, Bremer, J, Brown, G, Brunetti, L, Brunetti, G, Caiulo, D, Calin, M, Calvo, E, Campanelli, M, Cankocak, K, Cantini, C, Carlus, B, Cautisanu, B, Chalifour, M, Chappuis, A, Charitonidis, N, Chatterjee, A, Chiriacescuf, A, Chiu, P, Conforti, S, Cotte, P, Crivelli, P, Cuesta, C, Dawson, J, De Bonis, I, De La Taille, C, Delbart, A, Di Luise, S, Doizon, F, Drancourt, C, Duchesneau, D, Dulucq, F, Duval, F, Emery, S, Ereditato, A, Falcone, A, Fusshoeller, K, Gallego-Ros, A, Galymov, V, Geffroy, N, Gendotti, A, Gherghel-Lascu, A, Gil-Botella, I, Girerd, C, Gomoiu, M, Gorodetzky, P, Hamada, E, Hanni, R, Hasegawa, T, Holin, A, Horikawa, S, Ikeno, M, Jiménez, S, Jipa, A, Karolak, M, Karyotakis, Y, Kasai, S, Kasami, K, Kishishita, T, Konari, H, Kreslo, I, Kryn, D, Kunzé, P, Kurokawa, M, Kuromori, Y, Lastoria, C, Lazanu, I, Lehmann-Miotto, G, Leyton, M, Lira, N, Loo, K, Lorca, D, Lutz, P, Lux, T, Maalampi, J, Maire, G, Maki, M, Manenti, L, Margineanu, R, Marteau, J, Martin-Chassard, G, Mathez, H, Mazzucato, E, Misitano, G, Mladenov, D, Molina Bueno, L, Mosu, T, Mu, W, Murphy, S, Nakayoshi, K, Narita, S, Navas-Nicolás, D, Negishi, K, Nessi, M, Niculescu-Oglinzanu, M, Noto, F, Noury, A, Onishchuk, Y, Palomares, C, Parvu, M, Patzak, T, Penichot, Y, Pennacchio, E, Periale, L, Pessard, H, Pietropaolo, F, Pugnere, D, Radics, B, Redondo, D, Regenfus, C, Remoto, A, Resnati, F, Ristea, O, Rubbia, A, Saftoiu, A, Sakashita, K, Sanchez, F, Santos, C, Scarpelli, A, Schloesser, C, Sendai, K, Sergiampietri, F, Shahsavarani, S, Shoji, M, Sinclair, J, Soto-Oton, J, Stanca, D, Stefan, D, Sulej, R, Tanaka, M, Toboaru, V, Tonazzo, A, Tromeur, W, Trzaska, W, Uchida, T, Urda, L, Vannucci, F, Vasseur, G, Verdugo, A, Viant, T, Vihonen, S, Vilalte, S, Weber, M, Wu, S, Yu, J, Zambelli, L, and Zito, M
- Subjects
photon: propagation ,Photomultiplier ,CERN Lab ,Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,tutkimuslaitteet ,Performance of High Energy Physics Detector ,Phase (waves) ,FOS: Physical sciences ,Cosmic ray ,Noble liquid detectors (scintillation, ionization, double-phase) ,Scintillator ,01 natural sciences ,7. Clean energy ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Optics ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Detectors and Experimental Techniques ,010306 general physics ,Instrumentation ,physics.ins-det ,Mathematical Physics ,scintillation counter ,Physics ,Scintillation ,Time projection chamber ,photomultiplier ,010308 nuclear & particles physics ,business.industry ,hep-ex ,Detector ,Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators) ,Instrumentation and Detectors (physics.ins-det) ,time projection chamber: liquid argon ,Performance of High Energy Physics Detectors ,Photon detectors for UV, visible and IR photons (vacuum) (photomulti-pliers, HPDs, others) ,Scintillators, scintillation and light emission processes (solid, gas and liquidscintillators) ,Photon detectors for UV, visible and IR photons (vacuum) (photomultipliers, HPDs, others) ,FIS/01 - FISICA SPERIMENTALE ,ilmaisimet ,Scintillation counter ,business ,kosminen säteily ,performance ,Particle Physics - Experiment - Abstract
The $3 \times 1 \times 1$ m$^3$ demonstrator is a dual phase liquid argon time projection chamber that has recorded cosmic rays events in 2017 at CERN. The light signal in these detectors is crucial to provide precise timing capabilities. The performances of the photon detection system, composed of five PMTs, are discussed. The collected scintillation and electroluminescence light created by passing particles has been studied in various detector conditions. In particular, the scintillation light production and propagation processes have been analyzed and compared to simulations, improving the understanding of some liquid argon properties., Comment: 30 pages, 26 figures
- Published
- 2020
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3. A 4 tonne demonstrator for large-scale dual-phase liquid argon time projection chambers
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T. Hasegawa, S. Bordoni, M. Chalifour, Sampsa Vihonen, G. Maire, D. Redondo, N. Geffroy, F. Duval, Ionel Lazanu, A. Verdugo, A. Saftoiu, M. Calin, J. Asaadi, S. Horikawa, Marc Weber, Marzio Nessi, D. Lorca, Masatoshi Maki, B.M. Cautisanu, K. Cankocak, Filippo Resnati, F. Sergiampietri, H. Pessard, M. Parvu, F. Vannucci, L. Zambelli, R. Sulej, M.M. Badoi, A.M. Blebea-Apostu, V. Galymov, G. Misitano, I. De Bonis, I. Gil-Botella, Paolo Crivelli, A. Gendotti, A. Noury, L. Balleyguier, V. Aushev, M.C. Gomoiu, Thorsten Lux, P. Lutz, A. Falcone, Romul Margineanu, B. Aimard, S. Wu, I. Kreslo, D. Stanca, K. Nakayoshi, A. Gallego-Ros, Laura Manenti, V. Toboaru, Y. Pénichot, L. Molina Bueno, D. Pugnere, D. Caiulo, Alexandru Jipa, N. Bourgeois, S. Vilalte, D. Kryn, Animesh Chatterjee, T. Viant, Y. Piret, E. Pennacchio, J. Soto-Oton, D. Autiero, T. Kishishita, E. Mazzucato, Diana Navas-Nicolas, S. Jiménez, Mario Campanelli, L. Scotto Lavina, Enrique Calvo, D. Stefan, C. Drancourt, Y. Karyotakis, J. Sinclair, C. Regenfus, C. Alt, N. Lira, Wladyslaw Henryk Trzaska, Antonio Ereditato, G. Lehmann-Miotto, P. Cotte, J.V. Dawson, Masahiro Ikeno, A. Holin, B. A. Popov, C. Girerd, J. Dumarchez, Yu. Onishchuk, T.S. Mosu, S. Kasai, D. Belver, Jong-Sung Yu, E. Bechetoille, B. Mitrica, S. Shahsavarani, A. Munteanu, B. Radics, K. Sakashita, F. Dulucq, B. Bourguille, Nikolaos Charitonidis, K. Fusshoeller, B.S. Dimitru, T. Patzak, G. Brunetti, P. Gorodetzky, K. Negishi, F. Doizon, J.P. Mols, S. Bolognesi, M. Zito, M. Gherghel-Lascu, A. Tonazzo, André Rubbia, A. Balaceanu, C. Ristea, J. Marteau, D. Mladenov, C. Cantini, H. Mathez, C. Moreno Martinez, L. Periale, F. Noto, Kai Loo, G. Martin-Chassard, Federico Sanchez, L. Brunetti, Y. Rigaut, G. Vasseur, A. Remoto, B. Carlus, C. M. Schloesser, Tomohisa Uchida, G. Brown, W. Tromeur, A. Delbart, W. Mu, P. Chiu, R. Hanni, Masashi Tanaka, S. Conforti, C. Santos, S. Narita, S. Murphy, L. Nita, Martin Auger, S. Di Luise, Jukka Maalampi, M. Shoji, P. Stroescu, T. Esanu, C. de la Taille, C. Lastoria, E. Hamada, M. Niculescu-Oglinzanu, J. Bremer, S. Emery, A. Scarpelli, C. Cuesta, D. Desforge, A. Chiriacescu, C. Giganti, D. Duchesneau, K. Sendai, C. Palomares, A. Chappuis, Katsuyu Kasami, M. Karolak, G. Balik, F. Pietropaolo, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Organisation de Micro-Électronique Générale Avancée (OMEGA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Aimard, B, Alt, C, Asaadi, J, Auger, M, Aushev, V, Autiero, D, Badoi, M, Balaceanu, A, Balik, G, Balleyguier, L, Bechetoille, E, Belver, D, Blebea-Apostu, A, Bolognesi, S, Bordoni, S, Bourgeois, N, Bourguille, B, Bremer, J, Brown, G, Brunetti, G, Brunetti, L, Caiulo, D, Calin, M, Calvo, E, Campanelli, M, Cankocak, K, Cantini, C, Carlus, B, Cautisanu, B, Chalifour, M, Chappuis, A, Charitonidis, N, Chatterjee, A, Chiriacescu, A, Chiu, P, Conforti, S, Cotte, P, Crivelli, P, Cuesta, C, Dawson, J, De Bonis, I, De La Taille, C, Delbart, A, Desforge, D, Di Luise, S, Dimitru, B, Doizon, F, Drancourt, C, Duchesneau, D, Dulucq, F, Dumarchez, J, Duval, F, Emery, S, Ereditato, A, Esanu, T, Falcone, A, Fusshoeller, K, Gallego-Ros, A, Galymov, V, Geffroy, N, Gendotti, A, Gherghel-Lascu, M, Giganti, C, Gil-Botella, I, Girerd, C, Gomoiu, M, Gorodetzky, P, Hamada, E, Hanni, R, Hasegawa, T, Holin, A, Horikawa, S, Ikeno, M, Jimenez, S, Jipa, A, Karolak, M, Karyotakis, Y, Kasai, S, Kasami, K, Kishishita, T, Kreslo, I, Kryn, D, Lastoria, C, Lazanu, I, Lehmann-Miotto, G, Lira, N, Loo, K, Lorca, D, Lutz, P, Lux, T, Maalampi, J, Maire, G, Maki, M, Manenti, L, Margineanu, R, Marteau, J, Martin-Chassard, G, Mathez, H, Mazzucato, E, Misitano, G, Mitrica, B, Mladenov, D, Bueno, L, Martinez, C, Mols, J, Mosu, T, Mu, W, Munteanu, A, Murphy, S, Nakayoshi, K, Narita, S, Navas-Nicolas, D, Negishi, K, Nessi, M, Niculescu-Oglinzanu, M, Nita, L, Noto, F, Noury, A, Onishchuk, Y, Palomares, C, Parvu, M, Patzak, T, Penichot, Y, Pennacchio, E, Periale, L, Pessard, H, Pietropaolo, F, Piret, Y, Popov, B, Pugnere, D, Radics, B, Redondo, D, Regenfus, C, Remoto, A, Resnati, F, Rigaut, Y, Ristea, C, Rubbia, A, Saftoiu, A, Sakashita, K, Sanchez, F, Santos, C, Scarpelli, A, Schloesser, C, Lavina, L, Sendai, K, Sergiampietri, F, Shahsavarani, S, Shoji, M, Sinclair, J, Soto-Oton, J, Stanca, D, Stefan, D, Stroescu, P, Sulej, R, Tanaka, M, Toboaru, V, Tonazzo, A, Tromeur, W, Trzaska, W, Uchida, T, Vannucci, F, Vasseur, G, Verdugo, A, Viant, T, Vihonen, S, Vilalte, S, Weber, M, Wu, S, Yu, J, Zambelli, L, Zito, M, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)
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Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,hiukkasfysiikka ,01 natural sciences ,7. Clean energy ,High Energy Physics - Experiment ,Neutrino detector ,High Energy Physics - Experiment (hep-ex) ,Ionization ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Neutrino detectors ,Detectors and Experimental Techniques ,Nuclear Experiment ,Instrumentation ,physics.ins-det ,Mathematical Physics ,gas: admixture ,Large Hadron Collider ,Detector ,neutriinot ,Instrumentation and Detectors (physics.ins-det) ,experimental equipment ,neutrino: detector ,Time projection chamber ,ilmaisimet ,time projection chambers ,Large scale cryogenic liquid detectors [8] ,photon: yield ,Particle Physics - Experiment ,performance ,Materials science ,CERN Lab ,Time projection chambers ,Particle tracking detectors (Gaseous detectors) ,ionization: yield ,particle tracking detectors (gaseous detectors) ,tutkimuslaitteet ,FOS: Physical sciences ,chemistry.chemical_element ,Optics ,0103 physical sciences ,Deep Underground Neutrino Experiment ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,010306 general physics ,Scintillation ,Argon ,010308 nuclear & particles physics ,business.industry ,hep-ex ,time projection chamber: liquid argon ,chemistry ,muon: cosmic radiation ,High Energy Physics::Experiment ,business ,Tonne ,neutrino detectors - Abstract
A 10 kilo-tonne dual-phase liquid argon TPC is one of the detector options considered for the Deep Underground Neutrino Experiment (DUNE). The detector technology relies on amplification of the ionisation charge in ultra-pure argon vapour and offers several advantages compared to the traditional single-phase liquid argon TPCs. A 4.2 tonne dual-phase liquid argon TPC prototype, the largest of its kind, with an active volume of \three has been constructed and operated at CERN. In this paper we describe in detail the experimental setup and detector components as well as report on the operation experience. We also present the first results on the achieved charge amplification, prompt scintillation and electroluminescence detection, and purity of the liquid argon from analyses of a collected sample of cosmic ray muons. A 10 kilo-tonne dual-phase liquid argon TPC is one of the detector options considered for the Deep Underground Neutrino Experiment (DUNE). The detector technology relies on amplification of the ionisation charge in ultra-pure argon vapour and oers several advantages compared to the traditional single-phase liquid argon TPCs. A 4.2 tonne dual-phase liquid argon TPC prototype, the largest of its kind, with an active volume of 3x1x1 $m^3$ has been constructed and operated at CERN. In this paper we describe in detail the experimental setup and detector components as well as report on the operation experience. We also present the first results on the achieved charge amplification, prompt scintillation and electroluminescence detection, and purity of the liquid argon from analyses of a collected sample of cosmic ray muons.
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- 2018
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4. Integrated simulation of ground motion mitigation, techniques for the future compact linear collider (CLIC)
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G. Balik, J. Pfingstner, J. Snuverink, Daniel Schulte, B. Caron, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), European Organization for Nuclear Research (CERN), and CLIC
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[PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph] ,Physics ,Nuclear and High Energy Physics ,Large Hadron Collider ,Offset (computer science) ,Interaction point ,Compact Linear Collider ,010308 nuclear & particles physics ,business.industry ,[SPI.MECA.VIBR]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Vibrations [physics.class-ph] ,Particle accelerator ,7. Clean energy ,01 natural sciences ,[SPI.AUTO]Engineering Sciences [physics]/Automatic ,law.invention ,law ,0103 physical sciences ,Physics::Accelerator Physics ,Thermal emittance ,Aerospace engineering ,010306 general physics ,Actuator ,Quadrupole magnet ,business ,Instrumentation - Abstract
CLIC is a proposal of CERN for a future high-energy particle collider. CLIC will collide electron and positron beams at a centre of mass energy of 3 TeV with a desired peak luminosity of 2×10 34 cm −2 s −1 . The luminosity performance of CLIC is sensitive to ground motion. Ground motion misaligns accelerator components, most importantly quadrupole magnets, which leads to emittance growth and beam–beam offset at the interaction point. This paper discusses the beam based feedback strategies currently used together with mechanical stabilization systems to address the above mentioned issues. These strategies consist of an Interaction Point Feedback (IPFB) and an Orbit Feedback (OFB). The two feedbacks have been designed independently and the main objective of this paper is to show how they interact. A simulation program is used in order to simulate the whole collider, it includes the behaviour of the beams, magnets, supports, ground attenuators, sensors, and actuators. Beam-offset feedback optimization and integrated simulations have been performed and results show that despite a detrimental coupling of both feedbacks at high frequency, it is possible to decrease the beam–beam offset and maintain the desired luminosity.
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- 2013
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5. The role of the adhesion molecule Nectin-4 in the pathogenesis of endometriosis
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Recep Bedir, M Kagitci, G Balik, Hasan Güçer, Pelin Bagci, Cüneyt Yurdakul, Ibrahim Sehitoglu, RTEÜ, Tıp Fakültesi, Cerrahi Tıp Bilimleri Bölümü, Bedir, Recep, Şehitoğlu, İbrahim, Balık, Gülşah, Kağıtçı, Mehmet, Gücer, Hasan, and Yurdakul, Cüneyt
- Subjects
Oncology ,Adult ,medicine.medical_specialty ,Endometriosis ,Adhesion (medicine) ,Endometrium ,Peritoneal Diseases ,Metastasis ,Pathogenesis ,Nectin ,Internal medicine ,medicine ,Humans ,Ovarian Diseases ,Cell adhesion molecule ,business.industry ,Obstetrics and Gynecology ,Middle Aged ,medicine.disease ,Immunohistochemistry ,medicine.anatomical_structure ,Reproductive Medicine ,Case-Control Studies ,Cancer research ,Ovarian Endometriosis ,Nectin-4 ,Female ,business ,Cell Adhesion Molecules - Abstract
GUCER, HASAN/0000-0002-9122-379X WOS: 000376471700037 PubMed: 27328518 Objective: Nectins are immunoglobulin-like adhesion molecules, and they play important role in cell proliferation and tumor metastasis. the objective in this study was to compare the expression of Nectin-4 in normal endometrium and in ectopic endometriotic tissues. Materials and Methods: Nectin-4 expression was investigated in ovarian endometriosis (n=20), peritoneal endometriosis (n=20), endometrium of endometriosis (n=20), and in a control group (having no endometriosis) (n=20) by immunohistochemical method. Results: Nectin-4 expression, when compared with control group, was higher in endometriotic lesions of patients having ovarian endometriosis and peritoneal endometriosis (p = 0.003 andp = 0.009, respectively). This difference was significant in the endometrium of patients having endometriosis (p = 0.011). Conclusion: the authors believe that Nectin-4 molecule may contribute to the pathogenesis of endometriosis. For this reason, the use of medicines developed against this molecule in the treatment of endometriosis may be useful. Recep Tayyip Erdogan University Scientific Research Support Fund This study has received financial support from Recep Tayyip Erdogan University Scientific Research Support Fund.
- Published
- 2016
6. Some features of flow and particle transport in porous structures
- Author
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A. Heitor Reis, Murat Aydin, G. Balik, and Antonio F. Miguel
- Subjects
porous structures ,fluid flow ,Materials science ,porous media ,Flow (mathematics) ,particle transport ,aerosol ,Mechanics ,CFD ,Porosity ,Particle transport ,deposition - Abstract
There has been a growing interest in the study of porous and complex flow structures due to its impact in technology. This concerns not only environmental but also diagnostic and therapeutic exposure in medical research. Physics of flow within porous structures is especially important to model transport and deposition of viruses, pollutants and drugs deep in these structures. In this work we analyze numerically low and medium Reynolds number flows in axisymmetric cylindrical duct surrounded by a torus. We also consider three different particle sizes (0.02, 0.1 and 20 micron) for possible physiological and environmental applications.
- Published
- 2005
7. Comparison of linear versus macrocyclic gadolinium chelates in rat skeletal muscle.
- Author
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Balik MS, Celiker FB, Tumkaya L, Mercantepe T, Topcu A, Sahin R, and Balik G
- Abstract
Objective: We investigated the effects on skeletal muscle of gadolinium based linear and macrocyclic radiocontrast agents applied at experimental intervals using histopathological methods., Methods: Thirty-two male Sprague-Dawley rats were included in the study for histopathological analysis. No procedure was performed on the healthy control group. The sham group received 0.1 ml/kg intravenous (IV) saline solution through the tail vein 4 times weekly for 5 weeks. The gadodiamide group received total 2 mmol/kg IV gadodiamide through the tail vein 4 times weekly for 5 weeks. The gadoteric-acid group received 2 mmol/kg IV gadoteric acid through the tail vein 4 times weekly for 5 weeks., Results: We determined no marked apoptotic myofibrils associated withcaspase-3 expression in these two groups. Furthermore, no calcineurin expression was observed in myofibrils in the two groups. However, quantitative analyses revealed a decrease in muscle-fiber area in the gadodiamide and gadoteric-acid groups compared to the control group (Respectively; p=0.001 and p=0.017)., Conclusion: In our experimental study, linear and macrocyclic GBCAs applied at repeated doses played no role in myofibril damage induced by caspase-3 and calcineurin - nuclear factor of activated T-cells in skeletal muscle tissue., Competing Interests: No conflict of interest was declared by the authors., (© Copyright 2022 by Istanbul Provincial Directorate of Health.)
- Published
- 2022
- Full Text
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8. An investigation of the effects of metformin on ovarian ischemia-reperfusion injury in rats.
- Author
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Topcu A, Balik G, Atak M, Mercantepe T, Uydu HA, and Tumkaya L
- Subjects
- Animals, Anti-Inflammatory Agents pharmacology, Antioxidants pharmacology, Caspase 3 metabolism, Estradiol blood, Female, Glutathione metabolism, Malondialdehyde metabolism, Metformin pharmacology, NF-kappa B metabolism, Ovarian Diseases blood, Ovarian Diseases metabolism, Ovarian Diseases pathology, Ovary drug effects, Ovary metabolism, Ovary pathology, Rats, Sprague-Dawley, Reperfusion Injury blood, Reperfusion Injury metabolism, Reperfusion Injury pathology, Tumor Necrosis Factor-alpha metabolism, Anti-Inflammatory Agents therapeutic use, Antioxidants therapeutic use, Metformin therapeutic use, Ovarian Diseases drug therapy, Reperfusion Injury drug therapy
- Abstract
Damage to the ovaries or tissue torsion can significantly reduce the ovarian reserve and thus cause severe gynecological and hormonal deficiencies. The discovery of new agents is always needed in the treatment of this condition. Metformin (MET) has been shown to be beneficial in attenuating ovarian ischemia-reperfusion injury. Fifty-six female Sprague Dawley rats were divided into seven groups. Group 1 represented the control group (C), Group 2, the ischemia group (I), and Group 3, the ischemia/reperfusion group (I/R). Group 4, the ischemia (I)+250 group, and Group 5, the ischemia (I)+500 group, received 250 mg/kg and 500 mg/kg MET, respectively. Group 6, the ischemia/reperfusion (I/R)+250 group, and Group 7, the ischemia/reperfusion (I/R)+500 group, received 250 mg/kg and 500 mg/kg MET, respectively. Tissue malondialdehyde (MDA), glutathione (GSH), and tumor necrosis factor-alpha (TNF-α) levels in ovarian tissue increased following I/R, while estradiol (E
2 ) levels decreased. Moreover, infiltration and diffuse edematous areas were observed in addition to diffuse vascular congestion and hemorrhage findings. Caspase-3 and nuclear factor kappa B (NF-κβ) expression levels also increased. MDA and TNF-α concentrations decreased in the MET treatment groups, while GSH and E2 levels increased. The findings showed that I/R causes ovarian damage through the induction of oxidative stress, inflammation, and apoptosis. However, MET application was effective in preventing damage in ovarian tissue by reducing levels of reactive oxygen species, proinflammatory cytokines, caspase-3 and NF-κβ., (Copyright © 2019 Elsevier B.V. All rights reserved.)- Published
- 2019
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9. Lower Urinary Tract Symptoms and Urinary Incontinence During Pregnancy.
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Balik G, Güven ES, Tekin YB, Şentürk Ş, Kağitci M, Üstüner I, Mete Ural Ü, and Şahin FK
- Subjects
- Adolescent, Adult, Cross-Sectional Studies, Female, Humans, Parity, Pregnancy, Pregnancy Outcome, Prospective Studies, Risk Factors, Socioeconomic Factors, Turkey epidemiology, Young Adult, Lower Urinary Tract Symptoms epidemiology, Pregnancy Complications epidemiology, Urinary Incontinence epidemiology
- Abstract
Objective: Lower urinary tract symptoms (LUTS) can frequently be seen in pregnant women. Pregnancy and delivery have been considered as risk factors in the occurrence of pelvic floor dysfunction and determinants of LUTS. The main associated risk factor is parity. In the present study, we aim to determine the frequency of LUTS and urinary incontinence (UI) during pregnancy and the associated risk factors., Methods: This prospective study was carried out in a total of 250 women during their 28- and 40-gestational week checks. The Urinary Distress Inventory-6, the Incontinence Impact Questionnaire-7, and International Consultation on Incontinence Questionnaire-Short Form were used to determine LUTS and its effect on quality of life., Results: The mean age and gestational age of the participants were 29.41 ± 5.70 year (range 18-44) and 35.45 ± 2.98 weeks (range 28-40), respectively. The prevalence of LUTS was 81.6%. The prevalence of UI during pregnancy was 37.2%. Stress urinary incontinence, urge urinary incontinence and mixed urinary incontinence were diagnosed as 15.6, 4.8 and 16.8%, respectively. We found that advanced age, smoking and multiparity were risk factors associated with incontinence. Incontinence reduced pregnant women's quality of life., Conclusions: Lower urinary tract symptoms are commonly seen among pregnant women and these symptoms negatively affect the quality of life of pregnant women. Advanced age, smoking and multiparity were risk factors associated with urinary incontinence and LUTS. Obstetricians should be on the lookout for individual urological problems in pregnancy. Resolving any urological issues and cessation of smoking for the affected individuals will help alleviate the problem., (© 2014 Wiley Publishing Asia Pty Ltd.)
- Published
- 2016
- Full Text
- View/download PDF
10. The role of the adhesion molecule Nectin-4 in the pathogenesis of endometriosis.
- Author
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Bedir R, Sehitoglu I, Balik G, Kagitci M, Gucer H, Yurdakul C, and Bagci P
- Subjects
- Adult, Case-Control Studies, Female, Humans, Immunohistochemistry, Middle Aged, Cell Adhesion Molecules metabolism, Endometriosis metabolism, Endometrium metabolism, Ovarian Diseases metabolism, Peritoneal Diseases metabolism
- Abstract
Objective: Nectins are immunoglobulin-like adhesion molecules, and they play important role in cell proliferation and tumor metastasis. The objective in this study was to compare the expression of Nectin-4 in normal endometrium and in ectopic endometriotic tissues., Materials and Methods: Nectin-4 expression was investigated in ovarian endometriosis (n = 20), peritoneal endometriosis (n = 20), endometrium of endometriosis (n = 20), and in a control group (having no endometriosis) (n = 20) by immunohistochemical method., Results: Nectin-4 expression, when compared with control group, was higher in endometriotic lesions of patients having ovarian endometriosis and peritoneal endometriosis (p = 0.003 and p = 0.009, respectively). This difference was significant in the endometrium of patients having endometriosis (p = 0.011)., Conclusion: The authors believe that Nectin-4 molecule may contribute to the pathogenesis of endometriosis. For this reason, the use of medicines developed against this molecule in the treatment of endometriosis may be useful.
- Published
- 2016
11. Nesfatin-1 and Vitamin D levels may be associated with systolic and diastolic blood pressure values and hearth rate in polycystic ovary syndrome.
- Author
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Sahin FK, Sahin SB, Ural UM, Cure MC, Senturk S, Tekin YB, Balik G, Cure E, Yuce S, and Kirbas A
- Subjects
- Adult, Blood Pressure physiology, Body Mass Index, Case-Control Studies, Female, Heart Rate physiology, Humans, Insulin Resistance physiology, Nucleobindins, Young Adult, Calcium-Binding Proteins blood, DNA-Binding Proteins blood, Nerve Tissue Proteins blood, Polycystic Ovary Syndrome blood, Polycystic Ovary Syndrome physiopathology, Vitamin D blood
- Abstract
Obesity, insulin resistance (IR), inflammation, and hyperandrogenism may lead to polycystic ovary syndrome (PCOS) and hypertension. Nesfatin-1 (N1) may be related to IR, obesity, and hypertension. Furthermore, a vitamin D (VD) deficiency is associated with hypertension and PCOS. We aimed to investigate N1 and VD levels in PCOS that have an effect on systolic and diastolic blood pressure (BP) and heart rate (HR).This study included 54 patients with PCOS and 48 age-body mass index (BMI)-matched healthy controls. PCOS was diagnosed according to clinical practice guidelines. Ferriman-Gallwey scores (FGS) were calculated, while N1, VD, and other hormonal and biochemical parameters were measured for all subjects. Systolic and diastolic BP was measured as well. HR was calculated using an electrocardiogram.The levels of N1 (p < 0.001), high-sensitivity C-reactive protein (hs-CRP) (p = 0.036), homeostasis model assessment as an index of insulin resistance (HOMA-IR) (p < 0.001), systolic (p < 0.001) and diastolic (p < 0.001) BP and HR (p < 0.001) in the PCOS group were significantly higher than in the control group. However, the VD levels of the PCOS group were lower than the control group (p = 0.004). N1 had a strong positive correlation with BMI, HOMA-IR, hs-CRP, luteinizing hormone, systolic and diastolic BP, and HR. VD levels were negatively correlated with HOMA-IR and luteinizing hormone.Elevated N1 and decreased VD levels may be related to the presence of high-normal BP or hypertension in PCOS subjects. N1 level may be associated with an increased BP due to its relation to inflammation and IR.
- Published
- 2015
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- View/download PDF
12. Is induction of labour by Propess(®) safe? A comparison of midwife-led versus obstetrician-led labour management.
- Author
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Bayoglu Tekin Y, Mete Ural U, Kerimoglu OS, Balik G, Kir Sahin F, and Guvendag Guven ES
- Subjects
- Administration, Intravaginal, Adult, Female, Humans, Oxytocics administration & dosage, Pregnancy, Pregnancy Outcome epidemiology, Retrospective Studies, Turkey epidemiology, Uterine Monitoring methods, Cesarean Section statistics & numerical data, Dinoprostone administration & dosage, Labor, Induced adverse effects, Labor, Induced methods, Labor, Induced statistics & numerical data, Midwifery methods, Midwifery statistics & numerical data, Uterine Contraction drug effects
- Abstract
This retrospective study compared maternal and fetal outcomes after labour induction, using a dinoprostone vaginal pessary (Propess(®)) in midwife-led and obstetrician-led labour management. Labour induction outcomes, delivery mode and rates of admission to the neonatal intensive care unit were compared. A total of 405 women, 40.5% (n = 164) from midwife-led units and 59.5% (n = 241) from an obstetrician-led unit, participated. There was no statistically significant difference between the two groups in caesarean section rate or neonatal intensive care unit admission rates (p = 0.789 and 0.769, respectively). Non-reassuring fetal non-stress test and uterine hyperstimulation risks were higher in the obstetrician-led unit (p = 0.003 and 0.001, respectively, and odds ratio (OR) 0.165, 95% CI: 0.117-0.232 and OR 0.218, 95% CI: 0.078-0.611, respectively). Postpartum blood transfusion rate was higher in the midwife-led units (p = 0.002, OR 8.082, 95% CI: 1.879-39.292). Labour induction with Propess(®) is safe during both midwife-led and obstetrician-led labour management.
- Published
- 2015
- Full Text
- View/download PDF
13. The role of hypoxia at primary dysmenorrhea, utilizing a novel hypoxia marker--SCUBE1.
- Author
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Tekin YB, Güvendağ Güven ES, Kirbas A, Üstüner I, Doğan OD, Balik G, and Şahin FK
- Subjects
- Adolescent, Biomarkers blood, Calcium-Binding Proteins, Cross-Sectional Studies, Dysmenorrhea etiology, Female, Humans, Hypoxia complications, Platelet Count, Prospective Studies, Turkey, Dysmenorrhea blood, Hypoxia blood, Membrane Proteins blood
- Abstract
Study Objective: To determine the SCUBE1 levels in adolescents with primary dysmenorrhea., Design: A prospective cross-sectional study., Setting: A university hospital outpatient clinic, Rize, Turkey., Participants: A total of 40 adolescent girls, 15 on menses and 25 not on menses., Interventions and Main Outcome Measures: Demographic features and menstrual history of the participants were assessed and blood samples were obtained for detecting the platelet volume, platelet counts, and SCUBE1 levels of the participants., Results: No difference was detected between the 2 groups in mean platelet volume, platelet count, and SCUBE1 levels., Conclusion: Future trials are required to investigate the relation between SCUBE1 levels and primary dysmenorrhea., (Copyright © 2015 North American Society for Pediatric and Adolescent Gynecology. Published by Elsevier Inc. All rights reserved.)
- Published
- 2015
- Full Text
- View/download PDF
14. Does low pentraxin-3 levels associate with polycystic ovary syndrome and obesity?
- Author
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Sahin FK, Sahin SB, Balik G, Ural UM, Tekin YB, Cure MC, Senturk S, Yuce S, and Cure E
- Abstract
Pentraxin-3 (PTX3) a cytokine-inducible molecule is released from various tissues. Its level increases as a response to different inflammatory conditions. Polycystic Ovary Syndrome (PCOS) is considered as a proinflammatory state. The aim of this study was to investigate the association between PTX3 and various metabolic and hormonal parameters in PCOS patients. This study included 64 new diagnosed PCOS patients who had been never treated previously with PCOS and 46 healthy controls with matched age and body mass index (BMI). PTX3, biochemical and hormonal parameters of both groups were measured. The patients were divided into obese and non-obese subgroups according to BMI (above or lower than 25 kg/m²). PTX3, HOMA-IR and high sensitive C-reactive protein (hs-CRP) levels of these subgroups were compared. Serum PTX3 (p=0.013), hs-CRP (p=0.015) and HOMA-IR (p=0.023) levels of PCOS patients were significantly higher than the control group. Serum PTX3 has been found to have negative correlations with BMI (r=-0.318, p < 0.001), waist circumference (r=-0.306, p < 0.001), HOMA-IR (r=-0.324, p < 0.001) and hs-CRP (r=-0.206, p=0.031). Subgroup analysis revealed PCOS women with obesity to have significantly higher serum PTX3 level than non-obese PCOS subjects (p=0.012), non-obese controls (p=0.015) and obese controls (p=0.002). Women with new diagnosed PCOS especially obese subjects had significantly lower serum PTX3 than the control group. PTX3 has been found to be negatively correlated with BMI and insulin resistance. Low PTX3 level may have a role in the etiology of PCOS and in the formation of atherosclerotic diseases by stimulation of chronic inflammation.
- Published
- 2014
15. Primary fallopian tube carcinoma diagnosed preoperatively by cervical smear.
- Author
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Ural UM, Balik G, Tekin YB, Sehitoglu I, Bedir R, and Sahin FK
- Subjects
- Adenocarcinoma, Papillary surgery, Fallopian Tube Neoplasms surgery, Female, Humans, Middle Aged, Preoperative Period, Adenocarcinoma, Papillary pathology, Fallopian Tube Neoplasms pathology, Vaginal Smears
- Abstract
Primary fallopian tube carcinoma is a rare clinical entity that constitutes a diagnostic challenge in gynecological practice. Patients generally suffer from the three symptoms: vaginal bleeding, pelvic pain, and vaginal discharge; however, this is usually not sufficient for confirming the diagnosis preoperatively in most circumstances. In this case report, we present a 49-year-old woman whose cervical smear raised a suspicion for fallopian tube carcinoma. All preoperative examination measures such as ultrasonography, hysteroscopy, and endometrial aspiration were normal. Repeated cervical smears were consistent with adenocarcinoma presumably ensourcing from the fallopian tube. The patient underwent laparatomy,total abdominal hysterectomy, bilateral salpingo-oophorectomy, and pelvic para-aortic lymph node dissection. The primary serous papillary adenocarcinoma of the right fallopian tube was detected at the histopathological analysis, and the patient was referred for adjuvant chemotherapy. Cervical smear findings can be the only clue for the diagnosis of fallopian tube carcinoma.
- Published
- 2014
- Full Text
- View/download PDF
16. Fibroblast growth factor 21 and its relation to metabolic parameters in women with polycystic ovary syndrome.
- Author
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Sahin SB, Ayaz T, Cure MC, Sezgin H, Ural UM, Balik G, and Sahin FK
- Subjects
- Adult, C-Reactive Protein metabolism, Case-Control Studies, Enzyme-Linked Immunosorbent Assay, Female, Humans, Young Adult, Fibroblast Growth Factors blood, Polycystic Ovary Syndrome blood
- Abstract
Objective: The aim of this study was to compare the serum levels of fibroblast growth factor 21 (FGF-21) between patients with polycystic ovary syndrome (PCOS) and control subjects and to assess the possible relation with the hormonal and metabolic parameters., Methods: A total of 91 patients with PCOS and 53 age- and body mass index (BMI)-matched healthy controls were included in the study. We evaluated anthropometric, hormonal and metabolic parameters in all the cases. Serum FGF-21 and high sensitive C-reactive protein (hsCRP) levels were measured by ELISA., Results: Mean fasting glucose and insulin, homeostasis model assessment insulin resistance index (HOMA-IR), triglyceride, total cholesterol, low density lipoprotein cholesterol, total testosterone, dehydroepiandrosterone sulfate (DHEAS) levels were significantly higher in PCOS patients. Serum FGF-21 levels were similar in PCOS (236.8 ± 171.2 pg/ml) and the control (224.6 ± 128.9 pg/ml) group (p = 0.654). FGF-21 level had no correlation with BMI, waist circumference, HOMA-IR, hsCRP and lipid parameters. However there was a significant negative correlation between FGF-21 and DHEAS levels (r = - 0.309, p = 0.003)., Conclusion: FGF-21 levels were similar in women with PCOS compared with those of age- and BMI- matched controls.
- Published
- 2014
- Full Text
- View/download PDF
17. Response to: Platelet indices in patients with unexplained recurrent miscarriage; related factors should be considered.
- Author
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Mete Ural U, Bayoğlu Tekin Y, Balik G, Kir Şahin F, and Colak S
- Subjects
- Female, Humans, Pregnancy, Abortion, Habitual blood, Blood Platelets physiology
- Published
- 2014
- Full Text
- View/download PDF
18. Could platelet distribution width be a predictive marker for unexplained recurrent miscarriage?
- Author
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Mete Ural U, Bayoğlu Tekin Y, Balik G, Kir Şahin F, and Colak S
- Subjects
- Abortion, Habitual drug therapy, Abortion, Habitual physiopathology, Adult, Anticoagulants therapeutic use, Biomarkers blood, Case-Control Studies, Female, Humans, Platelet Function Tests, Predictive Value of Tests, Pregnancy, Pregnancy Trimester, First, Prospective Studies, Risk Factors, Abortion, Habitual blood, Blood Platelets physiology
- Abstract
Purpose: The aim of our study was to evaluate the platelet function in unexplained recurrent miscarriage and to investigate whether any hematologic changes detectable by simple complete blood count have a diagnostic value for the prediction of unexplained recurrent miscarriage., Methods: A prospective study based on the comparison of 74 patients with unexplained recurrent first-trimester pregnancy loss with 208 control subjects matched for age. The two groups were compared in terms of platelet indices., Results: There was a significant difference in platelet distribution width in patients with unexplained recurrent miscarriage compared to healthy control subjects. Platelet distribution width values in the patient group were statistically higher (P < 0.001) than the control group., Conclusion: Our study provides an evidence that platelet distribution width gradually increases in women with recurrent miscarriage compared to control group. Patients with unexplained recurrent miscarriage have significantly increased platelet aggregation. This data may provide an empirical rationale for the use of anticoagulants in the management of this clinical condition.
- Published
- 2014
- Full Text
- View/download PDF
19. Posterior Reversible Encephalopathy Syndrome in a Postpartum Preeclamptic Woman without Seizure.
- Author
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Ural UM, Balik G, Sentürk S, Ustüner I, Cobanoğlu U, and Sahin FK
- Abstract
Posterior reversible encephalopathy syndrome (PRES) is a cliniconeuroradiological entity presenting with headache, confusion, visual disturbances or blindness, and seizures. Parieto-occipital white matter changes due to vasogenic oedema can be observed on imaging modalities. It rarely occurs without seizures and after delivery. We report a 33-year-old multigravida with a history of preeclampsia in term pregnancy complicated by PRES without seizures at the postpartum period. Clinical improvement with complete resolution without any complications was observed on the 6th day after delivery. Posterior reversible encephalopathy syndrome is reversible when early diagnosis is established and appropriate treatment is started without delay.
- Published
- 2014
- Full Text
- View/download PDF
20. Which endometrial pathologies need intraoperative frozen sections?
- Author
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Balik G, Kagitci M, Ustuner I, Akpinar F, and Guvendag Guven ES
- Subjects
- Adult, Aged, Aged, 80 and over, Endometrial Hyperplasia surgery, Endometrial Neoplasms surgery, Female, Follow-Up Studies, Humans, Male, Middle Aged, Prognosis, Retrospective Studies, Endometrial Hyperplasia pathology, Endometrial Neoplasms pathology, Frozen Sections, Hysterectomy, Monitoring, Intraoperative
- Abstract
Background: Endometrial cancers are the most common gynecologic cancers. Endometrial sampling is a preferred procedure for diagnosis of the endometrial pathology. It is performed routinely in many clinics prior to surgery in order to exclude an endometrial malignancy. We aimed to investigate the accuracy of endometrial sampling in the diagnosis of endometrial pathologies and which findings need intra-operative frozen sections., Materials and Methods: Three hundred nine women applying to a university hospital and undergoing endometrial sampling and hysterectomy between 2010 and 2012 were included to this retrospective study. Data were retrieved from patient files and pathology archives., Results: There was 17 patients with malignancy but endometrial sampling could detect this in only 10 of them. The endometrial sampling sensitivity and specificity of detecting cancer were 58.8% and 100%, with negative and positive predictive values of 97.6%, and 100%, respectively. In 7 patients, the endometrial sampling failed to detect malignancy; 4 of these patients had a preoperative diagnosis of complex atypical endometrial hyperplasia and 2 patients had a post-menopausal endometrial polyps and 1 with simple endometrial hyperplasia., Conclusions: There is an increased risk of malignancy in post-menopausal women especially with endometrial polyps and complex atypia hyperplasia. Endometrial sampling is a good choice for the diagnosis of endometrial pathologies. However, the diagnosis should be confirmed by frozen section in patients with post-menopausal endometrial polyps and complex atypia hyperplasia.
- Published
- 2013
- Full Text
- View/download PDF
21. Behavior of submicrometer particles in periodic alveolar airflows.
- Author
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Balik G, Reis AH, Aydin M, and Miguel AF
- Subjects
- Animals, Humans, Motor Activity physiology, Respiratory Mechanics physiology, Rest physiology, Microspheres, Models, Biological, Pulmonary Alveoli physiology
- Abstract
Here, we report a numerical experiment in which submicrometer particle entrainment in a periodic flow that matches those existing in the alveolus in the human lung was simulated for both sedentary and light activity. A spherical cavity with a prescribed velocity profile at the inlet was used to simulate the time-dependent periodical flow of air in the alveolus. Expansion and contraction of the alveolus were simulated by setting a conceptual permeable wall as the outer surface of the model and adjusting the boundary conditions in order to match the continuity of the flow. The simulations were conducted for breathing periods of 5 and 3 s, which match sedentary and light activity conditions, respectively, and the results were extrapolated to the real lung. It was found that, most of the particles mainly followed a straightforward path and reached the opposite side of the alveolar wall in both breathing conditions. The concentration patterns obtained are consistent with the fact that the flow within the alveolus is mainly diffusive and does not greatly depend on the flow velocity. It was found that the particles which are heavier than air move out of phase with the periodic airflow that crosses the alveolus entrance, and that these particles are significantly caught within the alveolus. Particle entrapment increases with breathing rate in accordance with experimental values and indicates that increase in breathing frequency in environments with high concentration of submicrometer particles has the consequence of increasing particle entrapment by several times with respect to normal breathing rate.
- Published
- 2008
- Full Text
- View/download PDF
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