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Ungerer JH, Pally A, Kononov A, Lehmann S, Ridderbos J, Potts PP, Thelander C, Dick KA, Maisi VF, Scarlino P, Baumgartner A, Schönenberger C. Strong coupling between a microwave photon and a singlet-triplet qubit. Nat Commun 2024; 15:1068. [PMID: 38316779 PMCID: PMC10844229 DOI: 10.1038/s41467-024-45235-w] [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: 10/23/2023] [Accepted: 01/18/2024] [Indexed: 02/07/2024] Open
Abstract
Combining superconducting resonators and quantum dots has triggered tremendous progress in quantum information, however, attempts at coupling a resonator to even charge parity spin qubits have resulted only in weak spin-photon coupling. Here, we integrate a zincblende InAs nanowire double quantum dot with strong spin-orbit interaction in a magnetic-field resilient, high-quality resonator. The quantum confinement in the nanowire is achieved using deterministically grown wurtzite tunnel barriers. Our experiments on even charge parity states and at large magnetic fields, allow us to identify the relevant spin states and to measure the spin decoherence rates and spin-photon coupling strengths. We find an anti-crossing between the resonator mode in the single photon limit and a singlet-triplet qubit with a spin-photon coupling strength of g/2π = 139 ± 4 MHz. This coherent coupling exceeds the resonator decay rate κ/2π = 19.8 ± 0.2 MHz and the qubit dephasing rate γ/2π = 116 ± 7 MHz, putting our system in the strong coupling regime.
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Affiliation(s)
- J H Ungerer
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland.
- Swiss Nanoscience Institute, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland.
| | - A Pally
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland.
| | - A Kononov
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
| | - S Lehmann
- Solid State Physics and NanoLund, Lund University, Box 118, S-22100, Lund, Sweden
| | - J Ridderbos
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
- MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - P P Potts
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
- Swiss Nanoscience Institute, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
| | - C Thelander
- Solid State Physics and NanoLund, Lund University, Box 118, S-22100, Lund, Sweden
| | - K A Dick
- Centre for Analysis and Synthesis, Lund University, Box 124, S-22100, Lund, Sweden
| | - V F Maisi
- Solid State Physics and NanoLund, Lund University, Box 118, S-22100, Lund, Sweden
| | - P Scarlino
- Institute of Physics and Center for Quantum Science and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | - A Baumgartner
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
- Swiss Nanoscience Institute, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
| | - C Schönenberger
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
- Swiss Nanoscience Institute, University of Basel, Klingelbergstrasse 82, CH-4056, Basel, Switzerland
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Toenges R, Greinix H, Lawitschka A, Halter J, Baumgartner A, Simon A, Arends J, Jäger P, Middeke M, Hilgendorf I, Klein S, Wagner-Drouet EM, Schmid C, Bug G, Wolff D. Current practice in nutrition after allogeneic hematopoietic stem cell transplantation - Results from a survey among hematopoietic stem cell transplant centers. Clin Nutr 2021; 40:1571-1577. [PMID: 33744601 DOI: 10.1016/j.clnu.2021.02.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 11/04/2020] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Allogeneic hematopoietic stem cell transplantation (alloHSCT) is frequently associated with impaired oral intake and malnutrition, which potentially increases morbidity and mortality. Therefore, nutrition is one of the major challenges in the post-transplant period. METHODS To document the current clinical approach in nutritional treatment, we designed a questionnaire concerning the current practice in nutrition after alloHSCT and distributed it to German speaking centers performing alloHSCT in Germany, Austria and Switzerland between November 2018 and March 2020. Twenty-eight (39%) of 72 contacted centers completed the survey, 23 from Germany, two from Austria and three from Switzerland, representing 50% of alloHSCT activity within the participating countries in 2018. RESULTS All centers reported having nutritional guidelines for patients undergoing alloHSCT, whereby 86% (n = 24) provided a low-microbial diet during the neutropenic phase. The criteria to start parenteral nutrition (PN) directly after alloHSCT seemed to be consistent, 75% (n = 21) of the corresponding centers started PN if the oral nutritional intake or the bodyweight dropped below a certain limit. In the setting of intestinal graft-versus-host disease (GvHD) the current practice appeared to be more heterogenous. About 64% (n = 18) of the centers followed a special diet, added food stepwise modulated by GvHD symptoms, while only four centers regularly stopped oral intake completely (intestinal GvHD grade >1). Half of the centers (54%, n = 15) applied a lactose-free diet, followed by 43% (n = 12) which provided fat- and 18% (n = 5) gluten-free food in patients with intestinal GvHD. Supplementation of micronutrients in acute intestinal GvHD patients was performed by 54% (n = 15) of the centers, whereas vitamin D (89%, n = 25) and vitamin B12 (68%, n = 19) was added regularly independently of the presence of GvHD. Only 5 (18%) participating centers ever observed a food-associated infection during hospitalization, whereas food-associated infections were reported to occur more often in the outpatient setting (64%, n = 18). CONCLUSION The survey documented a general consensus about the need for nutritional guidelines for patients undergoing alloHSCT. However, the nutritional treatment in clinical practice (i.e. lactose-, gluten- or fat-free in intestinal GvHD) as well as the use of food supplements was very heterogeneous. In line with current general recommendations the centers seemed to focus on safe food handling practice rather than providing a strict neutropenic diet. More high-quality data are required to provide evidence-based nutrition to patients during and after alloHSCT.
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Affiliation(s)
- R Toenges
- Department of Medicine, Hematology/Oncology, Goethe-University, 60590 Frankfurt, Germany.
| | - H Greinix
- Division of Hematology, Medical University of Graz, Austria.
| | | | - J Halter
- Dept. of Hematology, University Hospital Basel, Switzerland.
| | - A Baumgartner
- Dept. of Endocrinology, Medical University Klinik Kantonsspital Aarau, Aarau, Switzerland.
| | - A Simon
- Pediatric Oncology and Hematology, Saarland University Hospital, Saar, Homburg, Germany.
| | - J Arends
- Department of Medicine I, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
| | - P Jäger
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Medical Faculty, Duesseldorf, Germany.
| | - M Middeke
- Dept. of Internal Medicine I, University Hospital Dresden, Dresden, Germany.
| | - I Hilgendorf
- Universitätsklinikum Jena, Klinik für Innere Medizin II, Abteilung für Hämatologie und Internistische Onkologie, Jena, Germany.
| | - S Klein
- III. Medizinische Klinik Hämatologie und Onkologie Universitätsmedizin Mannheim, Mannheim, Germany.
| | - E M Wagner-Drouet
- 3rd Medical Dept., Hematology, Oncology and Pneumology, University Medical Center Mainz, Germany.
| | - C Schmid
- Department of Hematology and Oncology, Universitätsklinikum Augsburg, Augsburg, Germany.
| | - G Bug
- Department of Medicine, Hematology/Oncology, Goethe-University, 60590 Frankfurt, Germany.
| | - D Wolff
- Dept. of Internal Medicine III, University Hospital, Regensburg, Germany.
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Taylor J, Baumgartner A, Schmid T, Brinkworth M. Responses to genotoxicity in mouse testicular germ cells and epididymal spermatozoa are affected by increased age. Toxicol Lett 2019; 310:1-6. [DOI: 10.1016/j.toxlet.2019.04.013] [Citation(s) in RCA: 5] [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] [Received: 11/30/2018] [Revised: 03/06/2019] [Accepted: 04/08/2019] [Indexed: 12/25/2022]
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Baumgartner A, Amann S, Werz M, Herkommer A, Dressel M, Fella S. Near-infrared optical investigations of snow, ice, and water layers on diffuse reflecting surfaces. Rev Sci Instrum 2018; 89:123106. [PMID: 30599544 DOI: 10.1063/1.5049652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 11/11/2018] [Indexed: 06/09/2023]
Abstract
While most experiments on water or ice utilize rather complex, elaborate, and expensive apparatus in order to obtain reliable optical data, here we present a simple and affordable setup that enables us to perform near-infrared measurements on water, ice, and snow on top of rough diffuse reflecting surfaces such as concrete, stone, pavement, or asphalt. By using the properties of diffuse scattering instead of specular reflection, we are able to determine the imaginary part of the refraction index of water without using any liquid cells. In addition, we demonstrate that the snow spectra can be well described by newly developed two-dimensional ray tracing simulations.
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Affiliation(s)
- A Baumgartner
- 1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
| | - S Amann
- Robert Bosch GmbH, Robert-Bosch-Allee 1, 74232 Abstatt, Germany
| | - M Werz
- Robert Bosch GmbH, Robert-Bosch-Allee 1, 74232 Abstatt, Germany
| | - A Herkommer
- Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany
| | - M Dressel
- 1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
| | - S Fella
- Robert Bosch GmbH, Robert-Bosch-Allee 1, 74232 Abstatt, Germany
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Dersch R, Benkler D, Robinson T, Baumgartner A, Rauer S, Stich O. Erythrophages do not develop when lumbar CSF and blood samples are mixed in vitro. Fluids Barriers CNS 2018; 15:31. [PMID: 30392467 PMCID: PMC6217771 DOI: 10.1186/s12987-018-0116-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 10/08/2018] [Indexed: 11/24/2022] Open
Abstract
Background Cerebrospinal fluid (CSF) analysis is a crucial method in the diagnostic process for suspected subarachnoid hemorrhage (SAH), especially when cerebral imaging is negative or inconclusive. CSF cytology (detection of erythrophages or siderophages) is used to determine whether a bloodstained CSF resembles a genuine SAH. Whether erythrophages may develop in vitro after a traumatic puncture in case of delayed CSF analysis is unclear. An in vitro development of erythrophages after traumatic puncture would diminish the diagnostic properties of CSF analysis. We assessed whether erythrophagocytosis is detectable in CSF after an imitated traumatic lumbar puncture. Methods We mimicked a traumatic lumbar puncture by mixing surplus CSF with whole blood from the same patient. From this mixture, cytological specimens were obtained immediately and repeatedly at time intervals of 1 h, until 7 h after mixing, or until the mixture was exhausted. Each cytological specimen was microscopically examined independently by four experienced CSF cytologists for the presence of erythrophages. Results We studied 401 CSF cytological specimens of 96 punctures in 90 patients. We could not identify any erythrophages in all cytological specimens. Fleiss’ Kappa for interrater-reliability was 1.0. Conclusions We did not find evidence for an in vitro erythrophagocytosis after a mimicked traumatic lumbar puncture. Therefore, the occurrence of erythrophages in CSF cytology can be regarded as a reliable sign of an autochthonous bleeding in the subarachnoid space. Our results support the crucial role of CSF analysis in clinical practice in case of a suspected SAH but negative cerebral imaging. Electronic supplementary material The online version of this article (10.1186/s12987-018-0116-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- R Dersch
- Department of Neurology, Medical Center-University of Freiburg, Breisacher Str. 64, 79106, Freiburg, Germany.
| | - D Benkler
- Department of Neurology, Medical Center-University of Freiburg, Breisacher Str. 64, 79106, Freiburg, Germany
| | - T Robinson
- Department of Neurology, Medical Center-University of Freiburg, Breisacher Str. 64, 79106, Freiburg, Germany
| | - A Baumgartner
- Department for Psychiatry and Psychotherapy, Medical Center-University of Freiburg, Freiburg, Germany
| | - S Rauer
- Department of Neurology, Medical Center-University of Freiburg, Breisacher Str. 64, 79106, Freiburg, Germany
| | - O Stich
- MVZ Neurologie, Constance, Constance, Germany
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Pilloux L, Baumgartner A, Jaton K, Lienhard R, Ackermann-Gäumann R, Beuret C, Greub G. Prevalence of Anaplasma phagocytophilum and Coxiella burnetii in Ixodes ricinus ticks in Switzerland: an underestimated epidemiologic risk. New Microbes New Infect 2018; 27:22-26. [PMID: 30534383 PMCID: PMC6278774 DOI: 10.1016/j.nmni.2018.08.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 08/27/2018] [Accepted: 08/29/2018] [Indexed: 11/25/2022] Open
Abstract
Ticks are vectors of several microorganisms responsible for infectious diseases in human and animals, such as Anaplasma phagocytophilum and Coxiella burnetii. In this study, we investigated the prevalence of these two bacteria in 62 889 Ixodes ricinus ticks in selected regions covering all Switzerland. A high prevalence of 11.9% of A. phagocytophilum DNA was observed by real-time PCR on 8534 pools of ticks. This pool prevalence corresponds to an estimated prevalence of 1.71% in individual tick. A total of 144 of the 171 collection sites (84.2%) were positive for the presence of A. phagocytophilum, and these sites were homogenously distributed throughout Switzerland. Such prevalence and geographical distribution underline the risk of human and animal exposure to A. phagocytophilum and highlight the need to assess the epidemiology and clinical diagnosis of human and animal anaplasmosis in Switzerland. However, DNA of C. burnetii was never found in any tick pool. This absence suggests a very low role of I. ricinus ticks as vector and reservoir of C. burnetii in Switzerland, and it supports previous reports demonstrating the role of sheep and goats in the epidemiology of Q fever. However, considering its pathogenic potential, it is necessary to keep monitoring for the possible reemergence of this bacterium in ticks in the future.
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Affiliation(s)
- L. Pilloux
- Institute of Microbiology of the Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - A. Baumgartner
- Federal Food Safety and Veterinary Office, Bern, Switzerland
| | - K. Jaton
- Institute of Microbiology of the Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - R. Lienhard
- ADMED Microbiologie, La Chaux-de-Fonds, Switzerland
- Spiez Laboratory, Federal Office for Civil Protection, Spiez, Switzerland
| | - R. Ackermann-Gäumann
- Swiss Reference Center for Tickborne Disease (NRZK/CNRT), Spiez, Switzerland
- Spiez Laboratory, Federal Office for Civil Protection, Spiez, Switzerland
| | - C. Beuret
- Spiez Laboratory, Federal Office for Civil Protection, Spiez, Switzerland
| | - G. Greub
- Institute of Microbiology of the Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
- Swiss Reference Center for Tickborne Disease (NRZK/CNRT), Spiez, Switzerland
- Corresponding author: G. Greub, Center for Research on Intracellular Bacteria, Institute of Microbiology, University Hospital Center and University of Lausanne, 1011 Lausanne, Switzerland
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Eckart A, Hausfater P, Amin D, Amin A, Haubitz S, Bernard M, Baumgartner A, Struja T, Kutz A, Christ-Crain M, Huber A, Mueller B, Schuetz P. Hyponatremia and activation of vasopressin secretion are both independently associated with 30-day mortality: results of a multicenter, observational study. J Intern Med 2018; 284:270-281. [PMID: 29664160 DOI: 10.1111/joim.12764] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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] [Indexed: 12/17/2022]
Abstract
BACKGROUND Hyponatremia is a common feature of acute illness and associated with increased mortality. This may be explained by a stress-mediated activation of the vasopressin system with an increase in free-water reabsorption. OBJECTIVES To investigate whether the association between hyponatremia and mortality could be explained by activation of the vasopressin system. METHODS We prospectively enrolled adult, medical patients seeking emergency care in three centres in Switzerland, France and the United States. We investigated associations between admission plasma sodium and copeptin, a stable portion of the vasopressin-precursor peptide, with 30-day mortality. We performed uni- and multivariate regression analysis. RESULTS Of 6962 included patients, 18% had hyponatremia (sodium ≤135 mmol L-1 ), which doubled their risk for mortality compared to patients with normonatremia (8.3% vs. 3.8%). This association was confirmed in a multivariate-adjusted logistic regression analysis [adjusted odds ratio (OR) 1.47, 95% CI 1.12-1.93, P = 0.005]. Vasopressin levels, mirrored by copeptin, were also increased in nonsurvivors and strongly associated with mortality (adjusted OR 3.42, 95% CI 2.76-4.25, P < 0.001). The association between hyponatremia and mortality remained unchanged when adding copeptin levels to the regression model (fully adjusted OR 1.53, 95% CI 1.16-2.00, P = 0.002). CONCLUSION This prospective study including medical patients upon emergency room admission found hyponatremia as well as an activation of the vasopressin system to be independently associated with mortality. This suggests that stress- and vasopressin-independent mechanisms are responsible for the association of low sodium levels with mortality.
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Affiliation(s)
- A Eckart
- Division of General Internal and Emergency Medicine, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - P Hausfater
- Emergency Department, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France.,Sorbonne Universités UPMC-Univ Paris06, UMRS INSERM 1166, IHUC, ICAN, Paris, France
| | - D Amin
- Morton Plant Hospital, Clearwater, FL, USA
| | - A Amin
- Morton Plant Hospital, Clearwater, FL, USA
| | - S Haubitz
- Division of General Internal and Emergency Medicine, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - M Bernard
- Biochemistry Department, Hôpital Pitié-Salpêtrière and Univ-Paris Descartes, Paris, France
| | - A Baumgartner
- Division of General Internal and Emergency Medicine, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - T Struja
- Division of General Internal and Emergency Medicine, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - A Kutz
- Division of General Internal and Emergency Medicine, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - M Christ-Crain
- Department of Endocrinology, Diabetology and Metabolism, University Hospital Basel, Basel, Switzerland
| | - A Huber
- Department of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - B Mueller
- Division of General Internal and Emergency Medicine, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - P Schuetz
- Division of General Internal and Emergency Medicine, University Department of Medicine, Kantonsspital Aarau, Aarau, Switzerland
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Boss R, Baumgartner A, Kroos S, Blattner M, Fretz R, Moor D. Rapid detection of viableLegionella pneumophilain tap water by a qPCR and RT-PCR-based method. J Appl Microbiol 2018; 125:1216-1225. [DOI: 10.1111/jam.13932] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/04/2018] [Accepted: 05/23/2018] [Indexed: 12/22/2022]
Affiliation(s)
- R. Boss
- Federal Food Safety and Veterinary Office; Berne Switzerland
| | - A. Baumgartner
- Federal Food Safety and Veterinary Office; Berne Switzerland
| | - S. Kroos
- Food Safety and Veterinary Office; Canton of Basel-Landschaft; Liestal Switzerland
| | - M. Blattner
- Food Safety and Veterinary Office; Canton of Basel-Landschaft; Liestal Switzerland
| | - R. Fretz
- Food Safety and Veterinary Office; Canton of Basel-Landschaft; Liestal Switzerland
| | - D. Moor
- Federal Food Safety and Veterinary Office; Berne Switzerland
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Santer D, Goncalves I, Nagel F, Kiss A, Hasun M, Baumgartner A, Kaun C, Trescher K, Wojta J, Podesser BK. P100Tenascin-C is induced by chronic hypoxia in cardiomyoblasts and exacerbates post myocardial infarction remodeling. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.063] [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: 11/14/2022] Open
Affiliation(s)
- D Santer
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
| | - I Goncalves
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
| | - F Nagel
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
| | - A Kiss
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
| | - M Hasun
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
| | - A Baumgartner
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
| | - C Kaun
- Medical University of Vienna, Department of Internal Medicine II, Division of Cardiology, Vienna, Austria
| | - K Trescher
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
| | - J Wojta
- Medical University of Vienna, Department of Internal Medicine II, Division of Cardiology, Vienna, Austria
| | - B K Podesser
- Medical University of Vienna, Center for Biomedical Research, Vienna, Austria
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Diston D, Robbi R, Baumgartner A, Felleisen R. Microbial source tracking in highly vulnerable karst drinking water resources. J Water Health 2018; 16:138-149. [PMID: 29424727 DOI: 10.2166/wh.2017.215] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Water resources situated in areas with underlying karst geology are particularly vulnerable to fecal pollution. In such vulnerable systems, microbial source tracking (MST) methods are useful tools to elucidate the pathways of both animal and human fecal pollution, leading to more accurate water use risk assessments. Here, we describe the application of a MST toolbox using both culture-dependent bacteriophage and molecular-dependent 16S rRNA assays at spring and well sites in the karstic St Imier Valley, Switzerland. Culture-dependent and molecular-dependent marker performance varied significantly, with the 16S rRNA assays displaying greater sensitivity than their phage counterpart; HF183 was the best performing human wastewater-associated marker while Rum2Bac was the best performing ruminant marker. Differences were observed in pollution regimes between the well and spring sampling sites, with the spring water being more degraded than the well site. Our results inform the choice of marker selection for MST studies and highlight differences in microbial water quality between well and spring karst sites.
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Affiliation(s)
- D Diston
- Federal Food Safety and Veterinary Office FSVO, Sector Laboratories, Schwarzenburgstrasse 165, 3003 Bern, Switzerland E-mail:
| | - R Robbi
- Cantonal Laboratory, Bern, Switzerland
| | - A Baumgartner
- Federal Food Safety and Veterinary Office FSVO, Sector Laboratories, Schwarzenburgstrasse 165, 3003 Bern, Switzerland E-mail:
| | - R Felleisen
- Federal Food Safety and Veterinary Office FSVO, Sector Laboratories, Schwarzenburgstrasse 165, 3003 Bern, Switzerland E-mail:
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Kabrt F, Baumgartner A, Stietka M, Friedmann H, Gruber V, Ringer W, Maringer FJ. A COMPARISON OF RADON INDOOR MEASUREMENTS WITH INTERPOLATED RADON SOIL GAS VALUES USING THE INVERSE WEIGHTING METHOD ON MEASURED RESULTS. Radiat Prot Dosimetry 2017; 177:213-219. [PMID: 28981810 DOI: 10.1093/rpd/ncx141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/16/2017] [Indexed: 06/07/2023]
Abstract
The European Basic Safety Standards demand the prediction of areas where a significant number of households exceed the reference level for the radon activity concentration. Therefore, radon maps are established which are based on indoor and soil gas measurements. In this study results of soil gas measurements are interpolated to get a value for the radon activity concentration in the soil gas at the coordinates of an indoor measurement and enable a direct comparison of both results. For the interpolation the inverse weighting value is applied. This way a prediction of the indoor radon activity concentration at the location of indoor measurements is attempted for verification. Quotients between the radon activity concentration in soil gas and indoors are analyzed. Building characteristics are also taken into account to evaluate parameters which lead to the reference level being exceeded. The results assist in the interpretation of soil gas measurements regarding the prediction of indoor radon activity concentrations.
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Affiliation(s)
- F Kabrt
- Austrian Agency for Health and Food Safety, Spargelfeldstraße 191, A-1220 Vienna/Wieningerstrasse 8, A-4020 Linz, Austria
- University of Natural Resources and Life Sciences, Low-Level Counting Laboratory Arsenal, Faradaygasse 3, Arsenal 214, 1030 Vienna, Austria
| | - A Baumgartner
- University of Natural Resources and Life Sciences, Low-Level Counting Laboratory Arsenal, Faradaygasse 3, Arsenal 214, 1030 Vienna, Austria
| | - M Stietka
- University of Natural Resources and Life Sciences, Low-Level Counting Laboratory Arsenal, Faradaygasse 3, Arsenal 214, 1030 Vienna, Austria
| | - H Friedmann
- University of Vienna, Isotope Research and Nuclear Physics, Währinger Straße 17, 1090 Vienna, Austria
| | - V Gruber
- Austrian Agency for Health and Food Safety, Spargelfeldstraße 191, A-1220 Vienna/Wieningerstrasse 8, A-4020 Linz, Austria
| | - W Ringer
- Austrian Agency for Health and Food Safety, Spargelfeldstraße 191, A-1220 Vienna/Wieningerstrasse 8, A-4020 Linz, Austria
| | - F J Maringer
- University of Natural Resources and Life Sciences, Low-Level Counting Laboratory Arsenal, Faradaygasse 3, Arsenal 214, 1030 Vienna, Austria
- BEV-Federal Office of Metrology and Surveying, Arltgasse 35, 1160 Vienna, Austria
- Vienna University of Technology, Karlsplatz 13, 1040 Vienna, Austria
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Kabrt F, Baumgartner A, Stietka M, Maringer FJ. INTRODUCTION AND TESTING OF A SIMPLIFIED METHOD FOR THE EVALUATION OF THE RADON EMANATION. Radiat Prot Dosimetry 2017; 177:26-30. [PMID: 29036707 DOI: 10.1093/rpd/ncx151] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The radioactive noble gas radon is identified as the highest risk factor for lung cancer after smoking. The exhalation of radon from building materials can contribute to the radon indoor activity concentration. Therefore, the emanation of radon might be a crucial factor. It is defined as the release of radon from the solid soil matter into the pore space of the material. This article describes a new on-site measurement method for the emanation of radon from building materials at industrial sites. Therefore, a closed vessel with sample material and a passive radon detector inside is used to measure the integrated build-up-curve of the activity concentration. Additionally, a brief overview on existing radon emanation measurement methods is given.
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Affiliation(s)
- F Kabrt
- University of Natural Resources and Life Sciences, Vienna, Prueflabor fuer Umweltradioaktivitaet und Strahlenschutz, Low-Level Counting Laboratory Arsenal, Arsenal 214, A-1030 Vienna, Austria
| | - A Baumgartner
- University of Natural Resources and Life Sciences, Vienna, Prueflabor fuer Umweltradioaktivitaet und Strahlenschutz, Low-Level Counting Laboratory Arsenal, Arsenal 214, A-1030 Vienna, Austria
| | - M Stietka
- University of Natural Resources and Life Sciences, Vienna, Prueflabor fuer Umweltradioaktivitaet und Strahlenschutz, Low-Level Counting Laboratory Arsenal, Arsenal 214, A-1030 Vienna, Austria
| | - F J Maringer
- University of Natural Resources and Life Sciences, Vienna, Prueflabor fuer Umweltradioaktivitaet und Strahlenschutz, Low-Level Counting Laboratory Arsenal, Arsenal 214, A-1030 Vienna, Austria
- BEV-Federal Office of Metrology and Surveying, Arltgasse 35, A-1160 Vienna, Austria
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13
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Wiedner H, Riedl J, Maringer FJ, Baumgartner A, Stietka M, Kabrt F. Production and characterization of a traceable NORM material and its use in proficiency testing of gamma-ray spectrometry laboratories. Appl Radiat Isot 2017; 134:45-50. [PMID: 29079417 DOI: 10.1016/j.apradiso.2017.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 08/23/2017] [Accepted: 09/15/2017] [Indexed: 11/18/2022]
Abstract
This paper outlines the process of characterizing a new NORM material for proficiency testing made of quartz sand with significantly elevated levels of 226Ra obtained from the backflush of a drinking water treatment facility. Samples of the fully characterized NORM material were sent to European laboratories concerned with radioactivity measurements and environmental monitoring by gamma-ray spectrometry for proficiency testing. The paper discusses the results, specific requirements, problems and solutions that were found during the characterization process and the proficiency test.
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Affiliation(s)
- H Wiedner
- BEV - Bundesamt für Eich- und Vermessungswesen, Arltgasse 35, 1160 Wien, Austria; BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria.
| | - J Riedl
- TU Wien - Technical University of Vienna, Karlsplatz 13, 1040 Wien, Austria
| | - F J Maringer
- BEV - Bundesamt für Eich- und Vermessungswesen, Arltgasse 35, 1160 Wien, Austria; BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria; TU Wien - Technical University of Vienna, Karlsplatz 13, 1040 Wien, Austria
| | - A Baumgartner
- BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria
| | - M Stietka
- BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria
| | - F Kabrt
- BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria
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14
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Friedmann H, Baumgartner A, Gruber V, Kaineder H, Maringer FJ, Ringer W, Seidel C. The uncertainty in the radon hazard classification of areas as a function of the number of measurements. J Environ Radioact 2017; 173:6-10. [PMID: 27554706 DOI: 10.1016/j.jenvrad.2016.08.011] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 08/07/2016] [Accepted: 08/08/2016] [Indexed: 06/06/2023]
Abstract
The administration in many countries demands a classification of areas concerning their radon risk taking into account the requirements of the EU Basic Safety Standards. The wide variation of indoor radon concentrations in an area which is caused by different house construction, different living style and different geological situations introduces large uncertainties for any classification scheme. Therefore, it is of importance to estimate the size of the experimental coefficient of variation (relative standard deviation) of the parameter which is used to classify an area. Besides the time period of measurement it is the number of measurements which strongly influences this uncertainty and it is important to find a compromise between the economic possibilities and the needed confidence level. Some countries do not use pure measurement results for the classification of areas but use derived quantities, usually called radon potential, which should reduce the influence of house construction, living style etc. and should rather represent the geological situation of an area. Here, radon indoor measurements in nearly all homes in three municipalities and its conversion into a radon potential were used to determine the uncertainty of the mean radon potential of an area as a function of the number of investigated homes. It could be shown that the coefficient of variation scales like 1/√n with n the number of measured dwellings. The question how to deal with uncertainties when using a classification scheme for the radon risk is discussed and a general procedure is proposed.
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Affiliation(s)
- H Friedmann
- University of Vienna, Faculty of Physics, Nuclear Physics, Währinger Strasse 17, A 1090 Vienna, Austria.
| | - A Baumgartner
- University of Natural Resources and Life Sciences, Vienna, LLC-Laboratory Arsenal, Faradaygasse 3, Arsenal 214, A 1030 Vienna, Austria.
| | - V Gruber
- AGES - Austrian Agency for Health and Food Safety, Radon and Radioecology, Wieningerstrasse 8, A 4020 Linz, Austria.
| | - H Kaineder
- Federal Government of Upper Austria, Environment, Kärntnerstrasse 10-12, A 4020 Linz, Austria.
| | - F J Maringer
- University of Natural Resources and Life Sciences, Vienna, LLC-Laboratory Arsenal, Faradaygasse 3, Arsenal 214, A 1030 Vienna, Austria; BEV - Federal Office of Metrology and Surveying, Arltgasse 35, A 1160 Vienna, Austria.
| | - W Ringer
- AGES - Austrian Agency for Health and Food Safety, Radon and Radioecology, Wieningerstrasse 8, A 4020 Linz, Austria.
| | - C Seidel
- University of Natural Resources and Life Sciences, Vienna, LLC-Laboratory Arsenal, Faradaygasse 3, Arsenal 214, A 1030 Vienna, Austria.
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15
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Friedmann H, Baumgartner A, Bernreiter M, Gräser J, Gruber V, Kabrt F, Kaineder H, Maringer FJ, Ringer W, Seidel C, Wurm G. Indoor radon, geogenic radon surrogates and geology - Investigations on their correlation. J Environ Radioact 2017; 166:382-389. [PMID: 27158059 DOI: 10.1016/j.jenvrad.2016.04.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 04/20/2016] [Accepted: 04/20/2016] [Indexed: 06/05/2023]
Abstract
The indoor radon concentration was measured in most houses in a couple of municipalities in Austria. At the same time the activity concentration of radium in soil, the soil gas radon concentration, the permeability of the ground and the ambient dose equivalent rate were also measured and the geological situations (geological units) were recorded too. From the indoor radon concentration and different house and living parameters a radon potential (Austrian radon potential) was derived which should represent the radon concentration in a standard room. Another radon potential (Neznal radon potential) was calculated from the soil gas radon concentration and the permeability. The aim of the investigation was to correlate all the different variables and to test if the use of surrogate data (e.g. geological information, ambient dose equivalent rate, etc.) can be used to judge the radon risk for an area without performing numerous indoor measurements.
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Affiliation(s)
- H Friedmann
- University of Vienna, Faculty of Physics, Nuclear Physics, Währinger Strasse 17, A 1090 Vienna, Austria.
| | - A Baumgartner
- University of Natural Resources and Life Sciences, Vienna, LLC-Laboratory Arsenal, Faradaygasse 3, Arsenal 214, A 1030 Vienna, Austria.
| | - M Bernreiter
- AGES - Austrian Agency for Health and Food Safety, Radon and Radioecology, Wieningerstrasse 8, A 4020 Linz, Austria.
| | - J Gräser
- AGES - Austrian Agency for Health and Food Safety, Radon and Radioecology, Wieningerstrasse 8, A 4020 Linz, Austria
| | - V Gruber
- AGES - Austrian Agency for Health and Food Safety, Radon and Radioecology, Wieningerstrasse 8, A 4020 Linz, Austria.
| | - F Kabrt
- University of Natural Resources and Life Sciences, Vienna, LLC-Laboratory Arsenal, Faradaygasse 3, Arsenal 214, A 1030 Vienna, Austria; BEV - Federal Office of Metrology and Surveying, Arltgasse 35, A 1160 Vienna, Austria.
| | - H Kaineder
- Federal Government of Upper Austria, Environment, Kärntnerstrasse 10-12, A 4020 Linz, Austria.
| | - F J Maringer
- University of Natural Resources and Life Sciences, Vienna, LLC-Laboratory Arsenal, Faradaygasse 3, Arsenal 214, A 1030 Vienna, Austria; BEV - Federal Office of Metrology and Surveying, Arltgasse 35, A 1160 Vienna, Austria.
| | - W Ringer
- AGES - Austrian Agency for Health and Food Safety, Radon and Radioecology, Wieningerstrasse 8, A 4020 Linz, Austria.
| | - C Seidel
- University of Natural Resources and Life Sciences, Vienna, LLC-Laboratory Arsenal, Faradaygasse 3, Arsenal 214, A 1030 Vienna, Austria.
| | - G Wurm
- AGES - Austrian Agency for Health and Food Safety, Radon and Radioecology, Wieningerstrasse 8, A 4020 Linz, Austria.
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16
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Fülöp G, d'Hollosy S, Hofstetter L, Baumgartner A, Nygård J, Schönenberger C, Csonka S. Wet etch methods for InAs nanowire patterning and self-aligned electrical contacts. Nanotechnology 2016; 27:195303. [PMID: 27040175 DOI: 10.1088/0957-4484/27/19/195303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Advanced synthesis of semiconductor nanowires (NWs) enables their application in diverse fields, notably in chemical and electrical sensing, photovoltaics, or quantum electronic devices. In particular, indium arsenide (InAs) NWs are an ideal platform for quantum devices, e.g. they may host topological Majorana states. While the synthesis has been continously perfected, only a few techniques have been developed to tailor individual NWs after growth. Here we present three wet chemical etch methods for the post-growth morphological engineering of InAs NWs on the sub-100 nm scale. The first two methods allow the formation of self-aligned electrical contacts to etched NWs, while the third method results in conical shaped NW profiles ideal for creating smooth electrical potential gradients and shallow barriers. Low temperature experiments show that NWs with etched segments have stable transport characteristics and can serve as building blocks of quantum electronic devices. As an example we report the formation of a single electrically stable quantum dot between two etched NW segments.
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Affiliation(s)
- G Fülöp
- Department of Physics, Budapest University of Technology and Economics, and Condensed Matter Research Group of the Hungarian Academy of Sciences, Budafoki út 8, 1111 Budapest, Hungary
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17
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Baumgartner A, Hueppe M, Schmeller W. Long-term benefit of liposuction in patients with lipoedema: a follow-up study after an average of 4 and 8 years. Br J Dermatol 2015; 174:1061-7. [DOI: 10.1111/bjd.14289] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2015] [Indexed: 11/29/2022]
Affiliation(s)
- A. Baumgartner
- Hanse-Klinik; St-Juergen-Ring 66 D-23564 Luebeck Germany
| | - M. Hueppe
- Department of Anaesthesiology and Intensive Care; University of Luebeck; Ratzeburger Allee 160 D-23538 Luebeck Germany
| | - W. Schmeller
- Hanse-Klinik; St-Juergen-Ring 66 D-23564 Luebeck Germany
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18
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Fülöp G, Domínguez F, d'Hollosy S, Baumgartner A, Makk P, Madsen MH, Guzenko VA, Nygård J, Schönenberger C, Levy Yeyati A, Csonka S. Magnetic Field Tuning and Quantum Interference in a Cooper Pair Splitter. Phys Rev Lett 2015; 115:227003. [PMID: 26650317 DOI: 10.1103/physrevlett.115.227003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Indexed: 06/05/2023]
Abstract
Cooper pair splitting (CPS) is a process in which the electrons of the naturally occurring spin-singlet pairs in a superconductor are spatially separated using two quantum dots. Here, we investigate the evolution of the conductance correlations in an InAs CPS device in the presence of an external magnetic field. In our experiments the gate dependence of the signal that depends on both quantum dots continuously evolves from a slightly asymmetric Lorentzian to a strongly asymmetric Fano-type resonance with increasing field. These experiments can be understood in a simple three-site model, which shows that the nonlocal CPS leads to symmetric line shapes, while the local transport processes can exhibit an asymmetric shape due to quantum interference. These findings demonstrate that the electrons from a Cooper pair splitter can propagate coherently after their emission from the superconductor and how a magnetic field can be used to optimize the performance of a CPS device. In addition, the model calculations suggest that the estimate of the CPS efficiency in the experiments is a lower bound for the actual efficiency.
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Affiliation(s)
- G Fülöp
- Department of Physics, Budapest University of Technology and Economics, and Condensed Matter Research Group of the Hungarian Academy of Sciences, Budafoki út 8, 1111 Budapest, Hungary
| | - F Domínguez
- Departamento de Física Teórica de la Materia Condensada, Condensed Matter Physics Center (IFIMAC), and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - S d'Hollosy
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - A Baumgartner
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - P Makk
- Department of Physics, Budapest University of Technology and Economics, and Condensed Matter Research Group of the Hungarian Academy of Sciences, Budafoki út 8, 1111 Budapest, Hungary
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - M H Madsen
- Center for Quantum Devices & Nano-Science Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - V A Guzenko
- Laboratory for Micro- and Nanotechnology, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - J Nygård
- Center for Quantum Devices & Nano-Science Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - C Schönenberger
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - A Levy Yeyati
- Departamento de Física Teórica de la Materia Condensada, Condensed Matter Physics Center (IFIMAC), and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - S Csonka
- Department of Physics, Budapest University of Technology and Economics, and Condensed Matter Research Group of the Hungarian Academy of Sciences, Budafoki út 8, 1111 Budapest, Hungary
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19
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Gramich J, Baumgartner A, Schönenberger C. Resonant and Inelastic Andreev Tunneling Observed on a Carbon Nanotube Quantum Dot. Phys Rev Lett 2015; 115:216801. [PMID: 26636862 DOI: 10.1103/physrevlett.115.216801] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Indexed: 06/05/2023]
Abstract
We report the observation of two fundamental subgap transport processes through a quantum dot (QD) with a superconducting contact. The device consists of a carbon nanotube contacted by a Nb superconducting and a normal metal contact. First, we find a single resonance with position, shape, and amplitude consistent with the theoretically predicted resonant Andreev tunneling (AT) through a single QD level. Second, we observe a series of discrete replicas of resonant AT at a separation of ~145 μeV, with a gate, bias, and temperature dependence characteristic for boson-assisted, inelastic AT, in which energy is exchanged between a bosonic bath and the electrons. The magnetic field dependence of the replica's amplitudes and energies suggest that two different bosons couple to the tunnel process.
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Affiliation(s)
- J Gramich
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - A Baumgartner
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - C Schönenberger
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
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20
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Knoblauch AM, Bratschi MW, Zuske MK, Althaus D, Stephan R, Hächler H, Baumgartner A, Prager R, Rabsch W, Altpeter E, Jost M, Mäusezahl M, Hatz C, Kiefer S. Cross-border outbreak of Salmonella enterica ssp. enterica serovar Bovismorbificans: multiple approaches for an outbreak investigation in Germany and Switzerland. Swiss Med Wkly 2015; 145:w14182. [DOI: 10.4414/smw.2015.14182] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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21
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Urbach H, Rauer S, Mader I, Paus S, Wagner J, Malter MP, Prüss H, Lewerenz J, Kassubek J, Hegen H, Auer M, Deisenhammer F, Ufer F, Bien CG, Baumgartner A. Supratentorial white matter blurring associated with voltage-gated potassium channel-complex limbic encephalitis. Neuroradiology 2015; 57:1203-9. [PMID: 26293130 DOI: 10.1007/s00234-015-1581-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 08/11/2015] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Limbic encephalitis (LE) associated with voltage-gated potassium channel-complex antibodies (VGKC-LE) is frequently non-paraneoplastic and associated with marked improvement following corticosteroid therapy. Mesial temporal lobe abnormalities are present in around 80 % of patients. If associated or preceded by faciobrachial dystonic seizures, basal ganglia signal changes may occur. In some patients, blurring of the supratentorial white matter on T2-weighted images (SWMB) may be seen. The purpose of this study was to evaluate the incidence of SWMB and whether it is specific for VGKC-LE. METHODS Two experienced neuroradiologists independently evaluated signal abnormalities on FLAIR MRI in 79 patients with LE while unaware on the antibody type. RESULTS SWMB was independently assessed as present in 10 of 36 (28 %) compared to 2 (5 %) of 43 non-VGKC patients (p = 0.009). It was not related to the presence of LGI1 or CASPR2 proteins of VGKC antibodies. MRI showed increased temporomesial FLAIR signal in 22 (61 %) VGKC compared to 14 (33 %) non-VGKC patients (p = 0.013), and extratemporomesial structures were affected in one VGKC (3 %) compared to 11 (26 %) non-VGKC patients (p = 0.005). CONCLUSION SWMB is a newly described MRI sign rather specific for VGKC-LE.
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Affiliation(s)
- H Urbach
- Department of Neuroradiology, University Medical Center Freiburg, Breisacher Str. 64, 79106, Freiburg, Germany.
| | - S Rauer
- Department of Neurology, University Medical Center Freiburg, Freiburg, Germany
| | - I Mader
- Department of Neuroradiology, University Medical Center Freiburg, Breisacher Str. 64, 79106, Freiburg, Germany
| | - S Paus
- Department of Neurology, University Medical Center, Bonn, Germany
| | - J Wagner
- Department of Epileptology, University Medical Center, Bonn, Germany
| | - M P Malter
- Department of Neurology, University of Cologne, Cologne, Germany
| | - H Prüss
- Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - J Lewerenz
- Department of Neurology, Ulm University, Ulm, Germany
| | - J Kassubek
- Department of Neurology, Ulm University, Ulm, Germany
| | - H Hegen
- Department of Neurology, University Innsbruck, Innsbruck, Austria
| | - M Auer
- Department of Neurology, University Innsbruck, Innsbruck, Austria
| | - F Deisenhammer
- Department of Neurology, University Innsbruck, Innsbruck, Austria
| | - F Ufer
- Department of Neurology, University Medical Center, Hamburg, Germany
| | - C G Bien
- Epilepsy Centre Bethel, Bielefeld-Bethel, Germany
| | - A Baumgartner
- Department of Neurology, University Medical Center Freiburg, Freiburg, Germany
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22
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d'Hollosy S, Jung M, Baumgartner A, Guzenko VA, Madsen MH, Nygård J, Schönenberger C. Gigahertz Quantized Charge Pumping in Bottom-Gate-Defined InAs Nanowire Quantum Dots. Nano Lett 2015; 15:4585-4590. [PMID: 26086240 DOI: 10.1021/acs.nanolett.5b01190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Semiconducting nanowires (NWs) are a versatile, highly tunable material platform at the heart of many new developments in nanoscale and quantum physics. Here, we demonstrate charge pumping, that is, the controlled transport of individual electrons through an InAs NW quantum dot (QD) device at frequencies up to 1.3 GHz. The QD is induced electrostatically in the NW by a series of local bottom gates in a state of the art device geometry. A periodic modulation of a single gate is enough to obtain a dc current proportional to the frequency of the modulation. The dc bias, the modulation amplitude and the gate voltages on the local gates can be used to control the number of charges conveyed per cycle. Charge pumping in InAs NWs is relevant not only in metrology as a current standard, but also opens up the opportunity to investigate a variety of exotic states of matter, for example, Majorana modes, by single electron spectroscopy and correlation experiments.
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Affiliation(s)
- S d'Hollosy
- †Institute of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - M Jung
- †Institute of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - A Baumgartner
- †Institute of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - V A Guzenko
- ‡Laboratory for Micro- and Nanotechnology, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - M H Madsen
- §Center for Quantum Devices and Nano-Science Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - J Nygård
- §Center for Quantum Devices and Nano-Science Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - C Schönenberger
- †Institute of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
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23
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Diston D, Sinreich M, Zimmermann S, Baumgartner A, Felleisen R. Evaluation of molecular- and culture-dependent MST markers to detect fecal contamination and indicate viral presence in good quality groundwater. Environ Sci Technol 2015; 49:7142-51. [PMID: 25871525 DOI: 10.1021/acs.est.5b00515] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Microbial contamination of groundwater represents a significant health risk to resource users. Culture-dependent Bacteroides phage and molecular-dependent Bacteroidales 16S rRNA assays are employed in microbial source tracking (MST) studies globally, however little is known regarding how these important groups relate to each other in the environment and which is more suitable to indicate the presence of waterborne fecal pollution and human enteric viruses. This study addresses this knowledge gap by examining 64 groundwater samples from sites with varying hydrogeological properties using a MST toolbox containing two bacteriophage groups (phage infecting GB-124 and ARABA-84), and two Bacteroidales 16S rRNA markers (Hf183 and BacR); those were compared to fecal indicator bacteria, somatic coliphage, Bacteroidales 16S rRNA marker AllBac, four human enteric viruses (norovirus GI and II, enterovirus and group A rotavirus) and supplementary hydrogeological/chemical data. Bacteroidales 16S rRNA indicators offered a more sensitive assessment of both human-specific and general fecal contamination than phage indicators, but may overestimate the risk from enteric viral pathogens. Comparison with hydrogeological and land use site characteristics as well as auxiliary microbiological and chemical data proved the plausibility of the MST findings. Sites representing karst aquifers were of significantly worse microbial quality than those with unconsolidated or fissured aquifers, highlighting the vulnerability of these hydrogeological settings.
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Affiliation(s)
- D Diston
- †Federal Food Safety and Veterinary Office FSVO, Bern 3003, Switzerland
| | - M Sinreich
- ‡Federal Office for the Environment FOEN, Bern 3003, Switzerland
| | - S Zimmermann
- ‡Federal Office for the Environment FOEN, Bern 3003, Switzerland
| | - A Baumgartner
- †Federal Food Safety and Veterinary Office FSVO, Bern 3003, Switzerland
| | - R Felleisen
- †Federal Food Safety and Veterinary Office FSVO, Bern 3003, Switzerland
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24
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Vande Loock K, Botsivali M, Zangogianni M, Anderson D, Baumgartner A, Fthenou E, Chatzi L, Marcos R, Agramunt S, Namork E, Granum B, Knudsen LE, Nielssen JKS, Meltzer HM, Haugen M, Kyrtopoulos SA, Decordier I, Plas G, Roelants M, Merlo F, Kleinjans J, Kogevinas M, Kirsch-Volders M. The effect of dietary estimates calculated using food frequency questionnaires on micronuclei formation in European pregnant women: a NewGeneris study. Mutagenesis 2014; 29:393-400. [DOI: 10.1093/mutage/geu052] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Salhofer-Polanyi S, Baumgartner A, Kraus J, Maida E, Schmied M, Leutmezer F. What to expect after natalizumab cessation in a real-life setting. Acta Neurol Scand 2014; 130:97-102. [PMID: 24720783 DOI: 10.1111/ane.12250] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND To minimize the risk of progressive multifocal leucoencephalopathy (PML), treatment with natalizumab is often stopped after 2 years, but evidence upon rebound of disease activity is limited and controversial. OBJECTIVE To evaluate effects of natalizumab discontinuation on clinical disease activity within twelve months after cessation. METHODS We retrospectively analyzed data of 201 patients with MS who discontinued natalizumab between 2007 and 2012. Mean change scores of annualized relapse rate (ARR) and expanded disability status scale (EDSS) were calculated for detection of rebound disease activity after twelve months. RESULTS Natalizumab exposure did not exceed 2 years in 50.2% of patients, and the most common reasons for discontinuation were a long treatment period and concern of PML (56%). A total of 11.9% experienced a rebound phenomenon within twelve months. Mean ARR prenatalizumab was lower (P = 0.001, 95% CI -1.0-0.000) and treatment response to natalizumab poorer (P < 0.001, 95% CI 0.4-1.3) in patients with rebound compared to those without, but rebound was not associated with brief exposure to natalizumab (P = 0.159, 95% CI -9.3-1.5). 86.1% of patients switched to another therapy. Patients without rebound were found more often in the group starting an alternative treatment early (P = 0.013). CONCLUSION Our data suggest that rebound of MS disease activity affects a subgroup of patients (11.9%), especially those with low disease activity before natalizumab therapy and a longer treatment gap after its withdrawal.
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Affiliation(s)
| | - A. Baumgartner
- Department of Neurology; Medical University of Vienna; Vienna Austria
| | - J. Kraus
- Paracelsus Medical University; Salzburg Austria
| | | | - M. Schmied
- Department of Neurology; Medical University of Vienna; Vienna Austria
| | - F. Leutmezer
- Department of Neurology; Medical University of Vienna; Vienna Austria
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Monova D, Monov S, Todorov T, Soderberg D, Kurz T, Weiner M, Eriksson P, Segelmark M, Jakuszko K, Sebastian A, Bednarz Z, Krajewska M, Wiland P, Madziarska K, Weyde W, Klinger M, Naidoo J, Wearne N, Jones E, Swanepoel C, Rayner B, Okpechi I, Endo N, Tsuboi N, Furuhashi K, Matsuo S, Maruyama S, Clerte M, Levi C, Touzot M, Fakhouri F, Monge C, Lebas C, Abboud I, Huart A, Durieux P, Charlin E, Thervet E, Karras A, Smykal-Jankowiak K, Niemir ZI, Polcyn-Adamczak M, Whatmough S, Sweeney N, Fernandez S, Hussain M, Dhaygude A, Jakuszko K, Bednarz Z, Sebastian A, Krajewska M, Gniewek K, Wiland P, Weyde W, Klinger M, Manenti L, Urban ML, Vaglio A, Gintoli E, Galletti M, Buzio C, Monova D, Monov S, Argirova T, Wong I, Ibrahim FH, Goh BL, Lim TS, Chan MW, Hiramtasu R, Ubara Y, Hoshino J, Takaichi K, Ghafoor V, Hussain M, Dhaygude A, Whatmough S, Fernandez S, Sweeney N, Hussain M, Dhaygude A, Sahay M, Soma J, Nakaya I, Sasaki N, Yoshikawa K, Sato H, Kaminskyy V, ZAbi Ska M, Krajewska M, Ko Cielska-Kasprzak K, Jakuszko K, Klinger M, Niemir Z, Wozniczka K, Swierzko A, Cedzynski M, Polcyn-Adamczak M, Sokolowska A, Szala A, Arjunan A, Mikhail A, Shrivastava R, Parker C, Aithal S, Gursu M, Ozari M, Yucetas E, Sumnu A, Doner B, Cebeci E, Ozkan O, Aktuglu MB, Karaali Z, Koldas M, Ozturk S, Marco H, Picazo M, Da Silva I, Gonzalez A, Arce Y, Gracia S, Corica M, Llobet J, Diaz M, Ballarin J, Schonermarck U, Hagele H, Baumgartner A, Fischereder M, Muller S, Oliveira CBL, Oliveira ASA, Carvalho CJB, Pessoa CTBC, Sette LHBC, Fernandes GV, Cavalcante MAGM, Valente LM, Wan Q, Hu H, He Y, Li T, Aazair N, Houmaid Z, Rhair A, Bennani N, Demin A, Petrova O, Kotova O, Demina L, Roccatello D, Sciascia S, Rossi D, Naretto C, Baldovino S, Alpa M, Salussola I, Modena V, Zakharova EV, Vinogradova OV, Stolyarevich ES, Yap DYH, Chan TM, Thanaraj V, Dhaygude A, Ponnusamy A, Pillai S, Argentiero L, Schena A, Rossini M, Manno C, Castellano G, Martino M, Mitrotti A, Giliberti M, Digiorgio C, Di Palma AM, Battaglia M, Ditonno P, Grandaliano G, Gesualdo L, Oliveira CBL, Carvalho CJB, Oliveira ASA, Pessoa CTBC, Sette LHBC, Fernandes GV, Cavalcante MAGM, Valente LM, Neprintseva N, Tchebotareva N, Bobkova I, Kozlovskaya L, Rabrenovi V, Kova Evi Z, Jovanovi D, Rabrenovi M, Anti S, Ignjatovi L, Petrovi M, Longhi S, Del Vecchio L, Vigano S, Casartelli D, Bigi MC, Corti M, Limardo M, Tentori F, Pontoriero G, Zeraati AA, Shariati Sarabi Z, Davoudabadi Farahani A, Mirfeizi Z, Bae E. PRIMARY AND SECONDARY GLOMERULONEPHRITIDES 2. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu170] [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: 11/13/2022] Open
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Köhler W, Ehrlich S, Dohmen C, Haubitz M, Hoffmann F, Schmidt S, Klingel R, Kraft A, Neumann-Haefelin T, Topka H, Stich O, Baumgartner A, Fassbender C. Tryptophan immunoadsorption for the treatment of autoimmune encephalitis. Eur J Neurol 2014; 22:203-6. [DOI: 10.1111/ene.12389] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 01/28/2014] [Indexed: 01/30/2023]
Affiliation(s)
- W. Köhler
- Department of Neurology and Neurological Intensive Care Medicine; Fachkrankenhaus Hubertusburg; Wermsdorf Germany
| | - S. Ehrlich
- Department of Neurology and Neurological Intensive Care Medicine; Fachkrankenhaus Hubertusburg; Wermsdorf Germany
| | - C. Dohmen
- Department of Neurology; University of Cologne; Cologne Germany
| | - M. Haubitz
- Department of Nephrology; General Hospital Fulda; Fulda Germany
| | - F. Hoffmann
- Department of Neurology; General Hospital Martha-Maria; Halle-Dölau Germany
| | - S. Schmidt
- Department of Anesthesia and Intensive Care; General Hospital Martha-Maria; Halle-Dölau Germany
| | - R. Klingel
- Apheresis Research Institute; Cologne Germany
| | - A. Kraft
- Department of Neurology; General Hospital Martha-Maria; Halle-Dölau Germany
| | | | - H. Topka
- Department of Neurology; General Hospital Bogenhausen; Munich Germany
| | - O. Stich
- Department of Neurology; University of Freiburg; Freiburg Germany
| | - A. Baumgartner
- Department of Neurology; University of Freiburg; Freiburg Germany
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Hummerjohann J, Naskova J, Baumgartner A, Graber HU. Enterotoxin-producing Staphylococcus aureus genotype B as a major contaminant in Swiss raw milk cheese. J Dairy Sci 2014; 97:1305-12. [PMID: 24440268 DOI: 10.3168/jds.2013-7643] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [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: 10/25/2013] [Accepted: 11/24/2013] [Indexed: 11/19/2022]
Abstract
The objective of this study was to characterize Staphylococcus aureus isolates from Swiss raw milk cheeses that had been found to be contaminated with coagulase-positive staphylococci and to estimate the frequency of the various genotypes, in particular the mastitis-associated Staph. aureus genotype B (GTB). The isolates were also tested for staphylococcal enterotoxin (SE) genes and other virulence factors. From 623 coagulase-positive staphylococci isolated from 78 contaminated raw milk cheeses, 609 were found to be Staphylococcus aureus. Genotyping of all Staph. aureus isolates was performed by PCR amplification of the 16S-23S rRNA intergenic spacer region, as this method was used previously to differentiate between mastitis subtypes associated with their clinical outcome. In total, 20 different genotypes were obtained and the 5 most frequently occurring genotypes were distributed in 6.4% or more of the samples. The enterotoxin-producing Staph. aureus GTB, known for its high contagiousness and increased pathogenicity in Swiss mastitis herds, was found to be the most abundant subtype at the sample level (71.8%) as well as among the isolates (62.0%). A subset of 107 isolates of the different genotypes were analyzed for the presence of SE genes and revealed 9 different SE gene patterns, with sed being most frequently detected and 26% being PCR-negative for SE genes. Almost all isolates of the major contaminant GTB contained the SE gene pattern sed, sej, ser, with half of them additionally carrying sea. Production of SE in vitro was consistent with the SE genes detected in most of the cases; however, some isolated GTB did not produce SEA. Staphylococcus aureus Protein A (spa) typing revealed 30 different subtypes and most GTB isolates belonged to the bovine spa type t2953; GTB/t2953 was linked among other subtypes to SE production in cheese and staphylococcal intoxication cases. Furthermore, 1 of the 623 isolates was a methicillin-resistant Staph. aureus, which was an seh-carrying Staph. aureus spa type tbl 0635 (non-GTB). We conclude that control and reduction of enterotoxigenic Staph. aureus GTB in dairy herds in Switzerland will not only prevent economic losses at the farm level but also improve the safety of raw milk cheeses; distribution of methicillin-resistant Staph. aureus via raw milk cheese is of less concern.
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Affiliation(s)
- J Hummerjohann
- Agroscope Liebefeld-Posieux Research Station ALP-Haras, Schwarzenburgstrasse 161, 3003 Berne, Switzerland.
| | - J Naskova
- Agroscope Liebefeld-Posieux Research Station ALP-Haras, Schwarzenburgstrasse 161, 3003 Berne, Switzerland
| | - A Baumgartner
- Swiss Federal Office of Public Health, Schwarzenburgstrasse 165, 3003 Berne, Switzerland
| | - H U Graber
- Agroscope Liebefeld-Posieux Research Station ALP-Haras, Schwarzenburgstrasse 161, 3003 Berne, Switzerland
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Maringer F, Baumgartner A, Rechberger F, Seidel C, Stietka M. Activity measurement and effective dose modelling of natural radionuclides in building material. Appl Radiat Isot 2013; 81:279-83. [DOI: 10.1016/j.apradiso.2013.03.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 03/08/2013] [Indexed: 11/26/2022]
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Salhofer-Polanyi S, Baumgartner A, Leutmezer F. Discontinuation of natalizumab — /INS;Reasons and implications. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1322] [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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Nia S, Sedlacek C, Baumgartner A, Baumgartner C. Psychotic symptoms overshadow motor dysfunction and dementia in normal pressure hydrozephalus —/INS; A case report. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.563] [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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Baumgartner A, Nia S, Geiblinger S, Baumgartner C. Psychiatric manifestation of adult form of Niemann–/INS;Pick type C. A case report. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.2434] [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: 10/26/2022]
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Trescher K, Hasun M, Baumgartner A, Dietl W, Wolfsberger M, Hallström S, Podesser BK. New HTK-N46B cardioplegia provides superior protection during ischemia/reperfusion in failing hearts. J Cardiovasc Surg (Torino) 2013; 54:413-421. [PMID: 23389583] [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: 06/01/2023]
Abstract
AIM The aim of this paper was to improve operative outcome during open-heart surgery in patients with failing hearts, the composition of cardioplegic solutions has to be further optimized. HTK-N46b, a novel cardioplegic solution, has been developed for efficient protection of the energy state of myocytes as well as endothelial cells. Aim of this study is the evaluation of HTK-N46b in comparison to its precursor Custodiol® (HTK) in failing rat hearts undergoing ischemia/reperfusion. METHODS In male Sprague Dawley rats myocardial infarction (MI) was induced by LAD ligation. Six weeks after MI cardiac function was determined by transthoracic echocardiography. Sixteen animals with hearts showing a fractional shortening <25% were randomly assigned to two groups, HTK (N.=8) and HTK-N46b (N.=8). After excision hearts were evaluated in an erythrocyte-perfused isolated working heart model. Cold ischemia (4°C) for 60 minutes was followed by 45 minutes of reperfusion. Cardiac arrest was induced either with HTK or HTK-N46b at the beginning of ischemia. RESULTS At similar preischemic fractional shortening (HTK-N46b: 14.41±1.83% vs. HTK: 14.91±1.92%; NS) postischemic recovery of stroke volume and stroke work were significantly improved in the HTK-N46b rat hearts compared to HTK. Concerning recovery of coronary flow there was no difference between groups. At the end of reperfusion the HTK-N46b protected group revealed higher levels of ATP (HTK-N46b: 22.01±0.89 nmol/mg protein vs. HTK: 16.83±1.72 nmol/mg protein; P<0.05) and energy charge (HTK-N46b: 0.82±0.02 vs. HTK: 0.74±0.02; P<0.05). CONCLUSION HTK-N46b showed superior cardioprotective properties according to postischemic hemodynamic recovery and biochemical markers compared to HTK in failing rat hearts.
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Affiliation(s)
- K Trescher
- Ludwig Boltzmann Cluster for Cardiovascular Research, Medical University Vienna, Vienna, Austria
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Hächler H, Marti G, Giannini P, Lehner A, Jost M, Beck J, Weiss F, Bally B, Jermini M, Stephan R, Baumgartner A. Outbreak of listerosis due to imported cooked ham, Switzerland 2011. Euro Surveill 2013. [DOI: 10.2807/ese.18.18.20469-en] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
From 24 April to 31 July 2011, nine cases of listeriosis were registered in the cantons of Aargau, Basel-Land and Zurich, Switzerland. In six of the cases, infection with Listeria monocytogenes was laboratory confirmed, while three remained suspected cases. The suspected cases were family members of confirmed cases with identical or similar symptoms. All confirmed cases were infected with a L. monocytogenes strain belonging to serovar 1/2a: all had an indistinguishable pulsotype by pulsed-field gel electrophoresis (PFGE). The same strain was detected in samples of cooked ham that were on sale from a particular retailer. Two samples of ham tested contained 470 and 4,800 colony-forming units (CFU) L. monocytogenes per gram respectively. Data of shopper cards from two confirmed cases could be evaluated: both cases had purchased the contaminated ham. The outbreak initiated a product recall and alert actions at national and European level, through the Rapid Alert System for Food and Feed (RASFF). Following the RASFF alert, the company producing the contaminated ham was inspected by the responsible authorities. Their investigations showed that the ham was not contaminated in the production plant, but in the premises of a company to which slicing and packing was outsourced.
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Affiliation(s)
- H Hächler
- Institute for Food Safety and Hygiene, Zurich, Switzerland
- National Centre for Enteropathogenic Bacteria and Listeria (NENT), Zurich, Switzerland
| | - G Marti
- Cantonal Laboratory, Zurich, Switzerland
| | - P Giannini
- Cantonal Laboratory, Bellinzona, Switzerland
| | - A Lehner
- Institute for Food Safety and Hygiene, Zurich, Switzerland
| | - M Jost
- Federal Office of Public Health, Berne, Switzerland
| | - J Beck
- Federal Office of Public Health, Berne, Switzerland
| | - F Weiss
- Cantonal Laboratory, Zurich, Switzerland
| | - B Bally
- Cantonal Ministry of Health, Zurich, Switzerland
| | - M Jermini
- Cantonal Laboratory, Bellinzona, Switzerland
| | - R Stephan
- Institute for Food Safety and Hygiene, Zurich, Switzerland
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Hächler H, Marti G, Giannini P, Lehner A, Jost M, Beck J, Weiss F, Bally B, Jermini M, Stephan R, Baumgartner A. Outbreak of listerosis due to imported cooked ham, Switzerland 2011. Euro Surveill 2013; 18:20469. [PMID: 23725774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
From 24 April to 31 July 2011, nine cases of listeriosis were registered in the cantons of Aargau, Basel-Land and Zurich, Switzerland. In six of the cases, infection with Listeria monocytogenes was laboratory confirmed, while three remained suspected cases. The suspected cases were family members of confirmed cases with identical or similar symptoms. All confirmed cases were infected with a L. monocytogenes strain belonging to serovar 1/2a: all had an indistinguishable pulsotype by pulsed-field gel electrophoresis (PFGE). The same strain was detected in samples of cooked ham that were on sale from a particular retailer. Two samples of ham tested contained 470 and 4,800 colony-forming units (CFU) L. monocytogenes per gram respectively. Data of shopper cards from two confirmed cases could be evaluated: both cases had purchased the contaminated ham. The outbreak initiated a product recall and alert actions at national and European level, through the Rapid Alert System for Food and Feed (RASFF). Following the RASFF alert, the company producing the contaminated ham was inspected by the responsible authorities. Their investigations showed that the ham was not contaminated in the production plant, but in the premises of a company to which slicing and packing was outsourced.
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Affiliation(s)
- H Hächler
- National Centre for Enteropathogenic Bacteria and Listeria (NENT), Zurich, Switzerland
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Bader A, Brodarac A, Hetzer R, Kurtz A, Stamm C, Baraki H, Kensah G, Asch S, Rojas S, Martens A, Gruh I, Haverich A, Kutschka I, Cortes-Dericks L, Froment L, Kocher G, Schmid RA, Delyagina E, Schade A, Scharfenberg D, Skorska A, Lux C, Li W, Steinhoff G, Drey F, Lepperhof V, Neef K, Fatima A, Wittwer T, Wahlers T, Saric T, Choi YH, Fehrenbach D, Lehner A, Herrmann F, Hollweck T, Pfeifer S, Wintermantel E, Kozlik-Feldmann R, Hagl C, Akra B, Gyongyosi M, Zimmermann M, Pavo N, Mildner M, Lichtenauer M, Maurer G, Ankersmit J, Hacker S, Mittermayr R, Mildner M, Haider T, Nickl S, Zimmermann M, Beer L, Lebherz-Eichinger D, Schweiger T, Mitterbauer A, Keibl C, Werba G, Frey M, Ankersmit HJ, Herrmann S, Lux CA, Steinhoff G, Holfeld J, Tepekoylu C, Wang FS, Kozaryn R, Schaden W, Grimm M, Wang CJ, Holfeld J, Tepekoylu C, Kozaryn R, Urbschat A, Zacharowski K, Grimm M, Paulus P, Avaca MJ, Kempf H, Malan D, Sasse P, Fleischmann B, Palecek J, Drager G, Kirschning A, Zweigerdt R, Martin U, Katsirntaki K, Haller R, Ulrich S, Sgodda M, Puppe V, Duerr J, Schmiedl A, Ochs M, Cantz T, Mall M, Martin U, Mauritz C, Kensah G, Lara AR, Dahlmann J, Zweigerdt R, Schwanke K, Hegermann J, Skvorc D, Gawol A, Azizian A, Wagner S, Krause A, Drager G, Ochs M, Haverich A, Gruh I, Martin U, Klopsch C, Gaebel R, Kaminski A, Chichkov B, Jockenhoevel S, Steinhoff G, Klose K, Roy R, Brodarac A, Kang KS, Bieback K, Nasseri B, Choi YH, Kurtz A, Stamm C, Lepperhof V, Polchynska O, Kruttwig K, Bruggemann C, Xu G, Drey F, Neef K, Saric T, Lichtenauer M, Werba G, Mildner M, Baumgartner A, Hasun M, Nickl S, Beer L, Mitterbauer A, Zimmermann M, Gyongyosi M, Podesser BK, Ankersmit HJ, Ludwig M, Tolk A, Skorska A, Noack T, Steinhoff G, Margaryan R, Assanta N, Menciassi A, Burchielli S, Matteucci M, Lionetti V, Luchi C, Cariati E, Coceani F, Murzi B, Martens A, Rojas SV, Kensah G, Rotarmel A, Baraki H, Haverich A, Martin U, Gruh I, Kutschka I, Nasseri BA, Klose K, Ebell W, Dandel M, Kukucka M, Gebker R, Choi YH, Hetzer R, Stamm C, Paulus P, Holfeld J, Urbschat A, Mutlak H, Ockelmann P, Tacke S, Zacharowski K, Scheller B, Pereszlenyi A, Rojas SV, Martens A, Baraki H, Schwanke K, Zweigerdt R, Martin U, Haverich A, Kutschka I, Rojas SV, Martens A, Meier M, Baraki H, Schecker N, Rathert C, Zweigerdt R, Martin U, Haverich A, Kutschka I, Roy R, Brodarac A, Kukucka M, Kurtz A, Becher PM, Choi YH, Drori-Carmi N, Bercovich N, Zahavi-Goldstein E, Jack M, Netzer N, Pinzur L, Chajut A, Tschope C, Stamm C, Ruch U, Kaminski A, Strauer BE, Tiedemann G, Steinhoff G, Schade A, Delyagina E, Scharfenberg D, Lux C, Steinhoff G, Schlegel F, Dhein S, Akhavuz O, Mohr FW, Dohmen PM, Schlegel F, Salameh A, Oelmann K, Kiefer P, Dhein S, Mohr FW, Dohmen PM, Schwanke K, Merkert S, Templin C, Jara-Avaca M, Muller S, Haverich A, Martin U, Zweigerdt R, Skorska A, von Haehling S, Ludwig M, Slavic S, Curato C, Altarche-Xifro W, Unger T, Steinhoff G, Li J, Zhang Y, Li WZ, Ou L, Lux CA, Ma N, Steinhoff G, Haase A, Alt R, Schwanke K, Martin U. 3rd EACTS Meeting on Cardiac and Pulmonary Regeneration Berlin-Brandenburgische Akademie, Berlin, Germany, 14-15 December 2012. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivs561] [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: 11/13/2022] Open
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Osipo C, Baumgartner A, Zlobin A, O'Toole M. Abstract P4-08-06: Notch-dependent Regulation of Novel Genes Associated with Trastuzumab Resistance. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p4-08-06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: We have shown previously that Notch-1 is critical for the development and maintenance of trasuzumab or lapatinib resistance in HER2 positive breast cancer cell lines. Here we sought to identify the critical genes that are regulated by Notch to promote anti-HER2 targeted resistance.
Methods: We measured expression of 84 known breast cancer-associated transcripts using a real-time PCR array in both trastuzumab sensitive and resistant BT474 cell lines. A 4 fold increase or decrease in transcripts levels were measured to be statisitically significant. To confirm the change in levels, we designed primers to each gene of interest and repeated the PCR at least three independent times. Furthermore, we specifically asked whether Notch-1 or it's transcriptional mediator, CBF-1, directly regulated any of the identified genes in HER2 positive breast cancer cells using a genetic knocked down approach. An ANOVA for multiple comparisons was used to compute statistical significance.
Results: We identified more than 4 fold increase in APC, ABCG2, ABCB1, Gata-3, Bcl-2, Id2, and HRG-2 transcripts in trastuzumab resistant versus sensitive cells. Conversley, Gli1 was downregulated in resistant versus sensitive cells. Interestingly, siRNA directed against Notch-1 or CBF-1 decreased ABCG2 and Gata-3, but conversely increased ABCB1 and HRG-2 in resistant cells.
Conclusions: Our findings demonstrate APC, ABCG2, ABCB1, Gata-3, Bcl-2, Id2, and HRG-2 transcripts are signficantly increased in trastuzumab resistant breast cancer cells compared to sensitive cells. More importantly, Notch-1 or it's direct transcriptional activator CBF-1 may contribute to traztuzumab resistance by directly regulating critical genes that contribute to multidrug resistance: ABCB1 and ABCG2 and/or genes associated with stem cell survival: Gata-3 and HRG-2.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P4-08-06.
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Affiliation(s)
- C Osipo
- Loyola University Chicago, Maywood, IL
| | | | - A Zlobin
- Loyola University Chicago, Maywood, IL
| | - M O'Toole
- Loyola University Chicago, Maywood, IL
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Abstract
The two electrons of a Cooper pair in a conventional superconductor form a spin singlet and therefore a maximally entangled state. Recently, it was demonstrated that the two particles can be extracted from the superconductor into two spatially separated contacts via two quantum dots in a process called Cooper pair splitting (CPS). Competing transport processes, however, limit the efficiency of this process. Here we demonstrate efficiencies up to 90%, significantly larger than required to demonstrate interaction-dominated CPS, and on the right order to test Bell's inequality with electrons. We compare the CPS currents through both quantum dots, for which large apparent discrepancies are possible. The latter we explain intuitively and in a semiclassical master equation model. Large efficiencies are required to detect electron entanglement and for prospective electronics-based quantum information technologies.
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Affiliation(s)
- J Schindele
- Department of Physics, University of Basel, Basel, Switzerland
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Baumgartner A, Gschwend S, Stöckli R, Battegay E, Zimmerli L. [Identification and clinical use of the Metabolic Syndrome]. Praxis (Bern 1994) 2012; 101:707-713. [PMID: 22618695 DOI: 10.1024/1661-8157/a000943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The Metabolic Syndrome is characterised by the following components: atherogenic dyslipidemia, elevated blood pressure, elevated glucose and abdominal obesity. 22% of 415 patients of an outpatient clinic in internal medicine fulfilled the criteria of a Metabolic Syndrome. The most common components were abdominal obesity, elevated blood pressure and elevated triglyceride. Only one in five treating physicians diagnosed a Metabolic Syndrome. Our data show that the concept of the Metabolic Syndrome has limited utility in clinical practice.
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Affiliation(s)
- A Baumgartner
- Klinik und Poliklinik für Innere Medizin, Universitätsspital Zürich, Rämistrasse 100, 8091 Zürich, Germany
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Baumgartner A, Rauer S. Komplette und langfristige Regredienz einer leichten depressiven Störung unter Interferon-β-1b-Behandlung nach achtwöchiger Therapiepause. Akt Neurol 2012. [DOI: 10.1055/s-0032-1304882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- A. Baumgartner
- Neurozentrum, Neurologische Universitätsklinik an der Albert-Ludwigs-Universität Freiburg
| | - S. Rauer
- Neurozentrum, Neurologische Universitätsklinik an der Albert-Ludwigs-Universität Freiburg
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Baumgartner A, Kurzawa-Zegota M, Laubenthal J, Cemeli E, Anderson D. Comet-assay parameters as rapid biomarkers of exposure to dietary/environmental compounds—An in vitro feasibility study on spermatozoa and lymphocytes. Mutation Research/Genetic Toxicology and Environmental Mutagenesis 2012; 743:25-35. [DOI: 10.1016/j.mrgentox.2011.12.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 10/12/2011] [Accepted: 12/15/2011] [Indexed: 01/13/2023]
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Dzilic E, Kreibich M, Santer D, Moser P, Nagel F, Kremer J, Baumgartner A, Hasun M, Podesser B, Trescher K. New NO Donor S-NO-HSA improves cardioplegic solutions. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297417] [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: 10/14/2022]
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Hofstetter L, Csonka S, Baumgartner A, Fülöp G, d'Hollosy S, Nygård J, Schönenberger C. Finite-bias Cooper pair splitting. Phys Rev Lett 2011; 107:136801. [PMID: 22026885 DOI: 10.1103/physrevlett.107.136801] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Indexed: 05/31/2023]
Abstract
In a device with a superconductor coupled to two parallel quantum dots (QDs) the electrical tunability of the QD levels can be used to exploit nonclassical current correlations due to the splitting of Cooper pairs. We experimentally investigate the effect of a finite potential difference across one quantum dot on the conductance through the other completely grounded QD in a Cooper pair splitter fabricated on an InAs nanowire. We demonstrate that the nonlocal electrical transport through the device can be tuned by electrical means and that the energy dependence of the effective density of states in the QDs is relevant for the rates of Cooper pair splitting (CPS) and elastic cotunneling. Such experimental tools are necessary to understand and develop CPS-based sources of entangled electrons in solid-state devices.
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Affiliation(s)
- L Hofstetter
- Department of Physics, University of Basel, Switzerland
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Lichtenauer M, Werba G, Mildner M, Hasun M, Baumgartner A, Nickl S, Mitterbauer A, Rauch M, Zimmermann M, Podesser B, Klepetko W, Ankersmit H. 258 Administration of Anti-Thymocyte Globulin (ATG) Preserves Cardiac Function after Experimental Myocardial Infarction. J Heart Lung Transplant 2011. [DOI: 10.1016/j.healun.2011.01.265] [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] Open
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Baumgartner A, Stock E, Patanè A, Eaves L, Henini M, Bimberg D. Optical imaging of electrical carrier injection into individual InAs quantum dots. Phys Rev Lett 2010; 105:257401. [PMID: 21231625 DOI: 10.1103/physrevlett.105.257401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Indexed: 05/30/2023]
Abstract
We image the micro-electroluminescence (EL) spectra of self-assembled InAs quantum dots (QDs) embedded in the intrinsic region of a GaAs p-i-n diode and demonstrate optical detection of carrier injection into a single QD. Tunneling of electrons and holes into the QDs at bias voltages below the flat-band condition leads to a spectrum of sharp EL lines from a small number of bright spots on the diode surface, characteristic of emission from individual QDs. We explain this behavior in terms of Coulomb interaction effects and the selective excitation of a small number of QDs within the ensemble due to preferential tunneling paths for carriers.
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Affiliation(s)
- A Baumgartner
- School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
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Pomper G, Trescher K, Santer D, Hasun M, Baumgartner A, Adelmann K, Inci M, Dietl W, Zuckermann A, Podesser B. Introducing a mouse model of brain death. J Neurosci Methods 2010; 192:70-4. [DOI: 10.1016/j.jneumeth.2010.07.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2009] [Revised: 07/15/2010] [Accepted: 07/15/2010] [Indexed: 10/19/2022]
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Kleine A, Baumgartner A, Trbovic J, Golubev DS, Zaikin AD, Schönenberger C. Magnetic field and contact resistance dependence of non-local charge imbalance. Nanotechnology 2010; 21:274002. [PMID: 20571189 DOI: 10.1088/0957-4484/21/27/274002] [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: 05/29/2023]
Abstract
Crossed Andreev reflection (CAR) in metallic nanostructures, a possible basis for solid-state electron entangler devices, is usually investigated by detecting non-local voltages in multi-terminal superconductor/normal metal devices. This task is difficult because other subgap processes may mask the effects of CAR. One of these processes is the generation of charge imbalance (CI) and the diffusion of non-equilibrium quasi-particles in the superconductor. Here we demonstrate a characteristic dependence of non-local CI on a magnetic field applied parallel to the superconducting wire, which can be understood by a generalization of the standard description of CI to non-local experiments. These results can be used to distinguish CAR and CI and to extract CI relaxation times in superconducting nanostructures. In addition, we investigate the dependence of non-local CI on the resistance of the injector and detector contacts and demonstrate a quantitative agreement with a recent theory using only material and junction characteristics extracted from separate direct measurements.
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Affiliation(s)
- A Kleine
- Institute of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland
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Sipinen V, Laubenthal J, Baumgartner A, Cemeli E, Linschooten JO, Godschalk RWL, Van Schooten FJ, Anderson D, Brunborg G. In vitro evaluation of baseline and induced DNA damage in human sperm exposed to benzo[a]pyrene or its metabolite benzo[a]pyrene-7,8-diol-9,10-epoxide, using the comet assay. Mutagenesis 2010; 25:417-25. [PMID: 20488941 PMCID: PMC2893308 DOI: 10.1093/mutage/geq024] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Exposure to genotoxins may compromise DNA integrity in male reproductive cells, putting future progeny at risk for developmental defects and diseases. To study the usefulness of sperm DNA damage as a biomarker for genotoxic exposure, we have investigated cellular and molecular changes induced by benzo[a]pyrene (B[a]P) in human sperm in vitro, and results have been compared for smokers and non-smokers. Sperm DNA obtained from five smokers was indeed more fragmented than sperm of six non-smokers (mean % Tail DNA 26.5 and 48.8, respectively), as assessed by the alkaline comet assay (P < 0.05). B[a]P-related DNA adducts were detected at increased levels in smokers as determined by immunostaining. Direct exposure of mature sperm cells to B[a]P (10 or 25 μM) caused moderate increases in DNA fragmentation which was independent of addition of human liver S9 mix for enzymatic activation of B[a]P, suggesting some unknown metabolism of B[a]P in ejaculates. In vitro exposure of samples to various doses of B[a]P (with or without S9) did not reveal any significant differences in sensitivity to DNA fragmentation between smokers and non-smokers. Incubations with the proximate metabolite benzo[a]pyrene-r-7,t-8-dihydrodiol-t9,10-epoxide (BPDE) produced DNA fragmentation in a dose-dependent manner (20 or 50 μM), but only when formamidopyrimidine DNA glycosylase treatment was included in the comet assay. These levels of DNA fragmentation were, however, low in relation to very high amounts of BPDE–DNA adducts as measured with 32P postlabelling. We conclude that sperm DNA damage may be useful as a biomarker of direct exposure of sperm using the comet assay adapted to sperm, and as such the method may be applicable to cohort studies. Although the sensitivity is relatively low, DNA damage induced in earlier stages of spermatogenesis may be detected with higher efficiencies.
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Affiliation(s)
- V Sipinen
- Department of Chemical Toxicology, Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo, Norway
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Baumgartner A, Nicolet J, Braun R. Plasmidfingerprints von schweinepathogenen E. coli 0149: 91: K 88 ac: Charakterisierung eines Plasmides für Streptomycin- und Sulfonamidresistenz. ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1439-0450.1983.tb01845.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Baumgartner A, Schifferli D, Spiess B. Epidemiologische Studie eines multiresistenten Enterobacter cloacae, Ursache von iatrogenen Infektionen in einer chirurgischen Einheit. ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1439-0450.1984.tb01283.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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