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Rapp J, Sandurkov B, Müller P, Jung N, Gleich B. A compact setup for behavioral studies measuring limb acceleration. HardwareX 2024; 18:e00522. [PMID: 38633334 PMCID: PMC11022083 DOI: 10.1016/j.ohx.2024.e00522] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/29/2024] [Accepted: 03/15/2024] [Indexed: 04/19/2024]
Abstract
Behavioral studies contribute largely to a broader understanding of human brain mechanisms and the process of learning and memory. An established method to quantify motor learning is the analysis of thumb activity. In combination with brain stimulation, the effect of various treatments on neural plasticity and motor learning can be assessed. So far, the setups for thumb abduction measurements employed consist of bulky amplifiers and digital-to-analog devices to record the data. We developed a compact hardware setup to measure acceleration data which can be integrated into a wearable, including a sensor board and a microcontroller board which can be connected to a PC via USB. Additionally, we provide two software packages including graphical user interfaces, one to communicate with the hardware and one to evaluate and process the data. This work demonstrates the construction and application of our setup at the example of thumb acceleration measurement with a custom made glove and its use for research. Using integrated circuits, the size of the measurement devices is reduced to this wearable. It is simple to construct and can be operated easily by non-technical staff.
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Affiliation(s)
- J. Rapp
- Munich Institute of Biomedical Engineering (MIBE), Technische Universität München, Garching 85748, Germany
| | - B. Sandurkov
- Munich Institute of Biomedical Engineering (MIBE), Technische Universität München, Garching 85748, Germany
| | - P. Müller
- Department of Pediatrics, Technical University Munich, Kinderzentrum München gemeinnützige GmbH, Heiglhofstrasse 65, Munich 81377, Germany
| | - N.H. Jung
- Department of Pediatrics, Technical University Munich, Kinderzentrum München gemeinnützige GmbH, Heiglhofstrasse 65, Munich 81377, Germany
| | - B. Gleich
- Munich Institute of Biomedical Engineering (MIBE), Technische Universität München, Garching 85748, Germany
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2
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Müller P, Synek A, Stauß T, Steinnagel C, Ehlers T, Gembarski PC, Pahr D, Lachmayer R. Development of a density-based topology optimization of homogenized lattice structures for individualized hip endoprostheses and validation using micro-FE. Sci Rep 2024; 14:5719. [PMID: 38459092 PMCID: PMC10923877 DOI: 10.1038/s41598-024-56327-4] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 03/05/2024] [Indexed: 03/10/2024] Open
Abstract
Prosthetic implants, particularly hip endoprostheses, often lead to stress shielding because of a mismatch in compliance between the bone and the implant material, adversely affecting the implant's longevity and effectiveness. Therefore, this work aimed to demonstrate a computationally efficient method for density-based topology optimization of homogenized lattice structures in a patient-specific hip endoprosthesis. Thus, the root mean square error (RMSE) of the stress deviations between the physiological femur model and the optimized total hip arthroplasty (THA) model compared to an unoptimized-THA model could be reduced by 81 % and 66 % in Gruen zone (GZ) 6 and 7. However, the method relies on homogenized finite element (FE) models that only use a simplified representation of the microstructural geometry of the bone and implant. The topology-optimized hip endoprosthesis with graded lattice structures was synthesized using algorithmic design and analyzed in a virtual implanted state using micro-finite element (micro-FE) analysis to validate the optimization method. Homogenized FE and micro-FE models were compared based on averaged von Mises stresses in multiple regions of interest. A strong correlation (CCC > 0.97) was observed, indicating that optimizing homogenized lattice structures yields reliable outcomes. The graded implant was additively manufactured to ensure the topology-optimized result's feasibility.
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Affiliation(s)
- Patrik Müller
- Institute of Product Development, Leibniz University of Hannover, Garbsen, 30823, Germany.
| | - Alexander Synek
- TU Wien, Institute for Lightweight Design and Structural Biomechanics, Vienna, 1060, Austria
| | - Timo Stauß
- Institute of Product Development, Leibniz University of Hannover, Garbsen, 30823, Germany
| | - Carl Steinnagel
- Institute of Product Development, Leibniz University of Hannover, Garbsen, 30823, Germany
| | - Tobias Ehlers
- Institute of Product Development, Leibniz University of Hannover, Garbsen, 30823, Germany
| | | | - Dieter Pahr
- TU Wien, Institute for Lightweight Design and Structural Biomechanics, Vienna, 1060, Austria
- Division Biomechanics, Karl Landsteiner University of Health Sciences, Krems, 3500, Austria
| | - Roland Lachmayer
- Institute of Product Development, Leibniz University of Hannover, Garbsen, 30823, Germany
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3
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Imgram P, König K, Maaß B, Müller P, Nörtershäuser W. Collinear Laser Spectroscopy of 2 ^{3}S_{1}→2 ^{3}P_{J} Transitions in Helium-like ^{12}C^{4+}. Phys Rev Lett 2023; 131:243001. [PMID: 38181159 DOI: 10.1103/physrevlett.131.243001] [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: 06/06/2023] [Accepted: 09/21/2023] [Indexed: 01/07/2024]
Abstract
Transition frequencies and fine-structure splittings of the 2 ^{3}S_{1}→2 ^{3}P_{J} transitions in helium-like ^{12}C^{4+} were measured by collinear laser spectroscopy on a 1-ppb level. Accuracy is increased by more than 3 orders of magnitude with respect to previous measurements, enabling tests of recent nonrelativistic (NR) QED calculations including terms up to mα^{7}. Deviations between the theoretical and experimental values are within theoretical uncertainties and are ascribed to mα^{8} and higher-order contributions in the series expansion of the NR QED calculations. Finally, prospects for an all-optical charge radius determination of light isotopes are evaluated.
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Affiliation(s)
- P Imgram
- Institut für Kernphysik, Departement of Physics, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - K König
- Institut für Kernphysik, Departement of Physics, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR, Campus Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - B Maaß
- Institut für Kernphysik, Departement of Physics, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - P Müller
- Institut für Kernphysik, Departement of Physics, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - W Nörtershäuser
- Institut für Kernphysik, Departement of Physics, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR, Campus Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
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Plattner P, Wood E, Al Ayoubi L, Beliuskina O, Bissell ML, Blaum K, Campbell P, Cheal B, de Groote RP, Devlin CS, Eronen T, Filippin L, Garcia Ruiz RF, Ge Z, Geldhof S, Gins W, Godefroid M, Heylen H, Hukkanen M, Imgram P, Jaries A, Jokinen A, Kanellakopoulos A, Kankainen A, Kaufmann S, König K, Koszorús Á, Kujanpää S, Lechner S, Malbrunot-Ettenauer S, Müller P, Mathieson R, Moore I, Nörtershäuser W, Nesterenko D, Neugart R, Neyens G, Ortiz-Cortes A, Penttilä H, Pohjalainen I, Raggio A, Reponen M, Rinta-Antila S, Rodríguez LV, Romero J, Sánchez R, Sommer F, Stryjczyk M, Virtanen V, Xie L, Xu ZY, Yang XF, Yordanov DT. Nuclear Charge Radius of ^{26m}Al and Its Implication for V_{ud} in the Quark Mixing Matrix. Phys Rev Lett 2023; 131:222502. [PMID: 38101341 DOI: 10.1103/physrevlett.131.222502] [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: 07/25/2023] [Accepted: 10/09/2023] [Indexed: 12/17/2023]
Abstract
Collinear laser spectroscopy was performed on the isomer of the aluminium isotope ^{26m}Al. The measured isotope shift to ^{27}Al in the 3s^{2}3p ^{2}P_{3/2}^{○}→3s^{2}4s ^{2}S_{1/2} atomic transition enabled the first experimental determination of the nuclear charge radius of ^{26m}Al, resulting in R_{c}=3.130(15) fm. This differs by 4.5 standard deviations from the extrapolated value used to calculate the isospin-symmetry breaking corrections in the superallowed β decay of ^{26m}Al. Its corrected Ft value, important for the estimation of V_{ud} in the Cabibbo-Kobayashi-Maskawa matrix, is thus shifted by 1 standard deviation to 3071.4(1.0) s.
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Affiliation(s)
- P Plattner
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
- Universität Innsbruck, Innrain 52, 6020 Innsbruck, Austria
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - E Wood
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - L Al Ayoubi
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - O Beliuskina
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - M L Bissell
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
- Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - P Campbell
- Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - B Cheal
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - R P de Groote
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - C S Devlin
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - T Eronen
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - L Filippin
- Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Université libre de Bruxelles, 1050 Brussels, Belgium
| | - R F Garcia Ruiz
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
- Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, Massachusetts 02139, USA
| | - Z Ge
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - S Geldhof
- Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium
| | - W Gins
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - M Godefroid
- Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Université libre de Bruxelles, 1050 Brussels, Belgium
| | - H Heylen
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Hukkanen
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - P Imgram
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - A Jaries
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - A Jokinen
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - A Kanellakopoulos
- Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium
| | - A Kankainen
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - S Kaufmann
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - K König
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - Á Koszorús
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium
| | - S Kujanpää
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - S Lechner
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
| | - S Malbrunot-Ettenauer
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - P Müller
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - R Mathieson
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - I Moore
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - W Nörtershäuser
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - D Nesterenko
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - R Neugart
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- Institut für Kernchemie, Universität Mainz, Fritz-Straßmann-Weg 2, 55128 Mainz, Germany
| | - G Neyens
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
- Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium
| | - A Ortiz-Cortes
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - H Penttilä
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - I Pohjalainen
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - A Raggio
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - M Reponen
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - S Rinta-Antila
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - L V Rodríguez
- ISOLDE, CERN Experimental Physics Department, Geneva 23, 1211 Genevè, Switzerland
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- IJCLab, CNRS/IN2P3, Université Paris-Saclay, 91400 Orsay, France
| | - J Romero
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - R Sánchez
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - F Sommer
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - M Stryjczyk
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - V Virtanen
- Department of Physics, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland
| | - L Xie
- Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Z Y Xu
- Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium
| | - X F Yang
- Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001 Leuven, Belgium
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, 209 Chengfu Road, 100871 Beijing, China
| | - D T Yordanov
- IJCLab, CNRS/IN2P3, Université Paris-Saclay, 91400 Orsay, France
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Leroy F, El Barraj A, Cheynis F, Müller P, Curiotto S. Determination of the Thermomigration Force on Adatoms. Phys Rev Lett 2023; 131:116202. [PMID: 37774294 DOI: 10.1103/physrevlett.131.116202] [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: 01/03/2023] [Revised: 05/24/2023] [Accepted: 07/12/2023] [Indexed: 10/01/2023]
Abstract
Thermal gradients in nanomaterials can cause surface mass transport phenomena. However, the atomic fluxes are challenging to quantify and the underlying atomic mechanisms are complex. Using low energy electron microscopy we have examined in operando, under a thermal gradient of 10^{4} K/m, the thermomigration of supercooled Si(111)-1×1 advacancy islands. The islands move in the direction of the thermal gradient at 0.26±0.06 nm/s. This reveals that the adatoms move toward the cold region and the effective force exerted on Si adatoms is 1.4±0.4×10^{-8} eV/nm. We quantify the heat of transport of Si atoms Q^{*}=1.2±0.4 eV and show that it corresponds to the combined effects of adatom creation at step edges and adatom diffusion on atomically flat terraces.
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Affiliation(s)
- F Leroy
- Aix Marseille Univ, CNRS, CINAM, AMUTECH, Marseille, France
| | - A El Barraj
- Aix Marseille Univ, CNRS, CINAM, AMUTECH, Marseille, France
| | - F Cheynis
- Aix Marseille Univ, CNRS, CINAM, AMUTECH, Marseille, France
| | - P Müller
- Aix Marseille Univ, CNRS, CINAM, AMUTECH, Marseille, France
| | - S Curiotto
- Aix Marseille Univ, CNRS, CINAM, AMUTECH, Marseille, France
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6
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Byron W, Harrington H, Taylor RJ, DeGraw W, Buzinsky N, Dodson B, Fertl M, García A, Garvey G, Graner B, Guigue M, Hayen L, Huyan X, Khaw KS, Knutsen K, McClain D, Melconian D, Müller P, Novitski E, Oblath NS, Robertson RGH, Rybka G, Savard G, Smith E, Stancil DD, Sternberg M, Storm DW, Swanson HE, Tedeschi JR, VanDevender BA, Wietfeldt FE, Young AR, Zhu X. First Observation of Cyclotron Radiation from MeV-Scale e^{±} following Nuclear β Decay. Phys Rev Lett 2023; 131:082502. [PMID: 37683153 DOI: 10.1103/physrevlett.131.082502] [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: 09/02/2022] [Revised: 05/03/2023] [Accepted: 07/12/2023] [Indexed: 09/10/2023]
Abstract
We present an apparatus for detection of cyclotron radiation yielding a frequency-based β^{±} kinetic energy determination in the 5 keV to 2.1 MeV range, characteristic of nuclear β decays. The cyclotron frequency of the radiating β particles in a magnetic field is used to determine the β energy precisely. Our work establishes the foundation to apply the cyclotron radiation emission spectroscopy (CRES) technique, developed by the Project 8 Collaboration, far beyond the 18-keV tritium endpoint region. We report initial measurements of β^{-}'s from ^{6}He and β^{+}'s from ^{19}Ne decays to demonstrate the broadband response of our detection system and assess potential systematic uncertainties for β spectroscopy over the full (MeV) energy range. To our knowledge, this is the first direct observation of cyclotron radiation from individual highly relativistic β's in a waveguide. This work establishes the application of CRES to a variety of nuclei, opening its reach to searches for new physics beyond the TeV scale via precision β-decay measurements.
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Affiliation(s)
- W Byron
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - H Harrington
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - R J Taylor
- Physics Department, North Carolina State University, Raleigh, North Carolina 27695, USA
- The Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - W DeGraw
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - N Buzinsky
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - B Dodson
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - M Fertl
- Institute for Physics, Johannes-Gutenberg University Mainz, 55128 Mainz, Germany
| | - A García
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - G Garvey
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - B Graner
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - M Guigue
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - L Hayen
- Physics Department, North Carolina State University, Raleigh, North Carolina 27695, USA
- The Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - X Huyan
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - K S Khaw
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - K Knutsen
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - D McClain
- Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA
| | - D Melconian
- Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA
| | - P Müller
- Physics Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - E Novitski
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - N S Oblath
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - R G H Robertson
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - G Rybka
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - G Savard
- Physics Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - E Smith
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - D D Stancil
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA
| | - M Sternberg
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - D W Storm
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - H E Swanson
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - J R Tedeschi
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - B A VanDevender
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - F E Wietfeldt
- Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - A R Young
- Physics Department, North Carolina State University, Raleigh, North Carolina 27695, USA
- The Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - X Zhu
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
- Center for Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
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7
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Müller P, Chandra NK, Sarkar A. Bayesian approaches to include real-world data in clinical studies. Philos Trans A Math Phys Eng Sci 2023; 381:20220158. [PMID: 36970825 DOI: 10.1098/rsta.2022.0158] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 09/27/2022] [Indexed: 06/18/2023]
Abstract
Randomized clinical trials have been the mainstay of clinical research, but are prohibitively expensive and subject to increasingly difficult patient recruitment. Recently, there is a movement to use real-world data (RWD) from electronic health records, patient registries, claims data and other sources in lieu of or supplementing controlled clinical trials. This process of combining information from diverse sources calls for inference under a Bayesian paradigm. We review some of the currently used methods and a novel non-parametric Bayesian (BNP) method. Carrying out the desired adjustment for differences in patient populations is naturally done with BNP priors that facilitate understanding of and adjustment for population heterogeneities across different data sources. We discuss the particular problem of using RWD to create a synthetic control arm to supplement single-arm treatment only studies. At the core of the proposed approach is the model-based adjustment to achieve equivalent patient populations in the current study and the (adjusted) RWD. This is implemented using common atoms mixture models. The structure of such models greatly simplifies inference. The adjustment for differences in the populations can be reduced to ratios of weights in such mixtures. This article is part of the theme issue 'Bayesian inference: challenges, perspectives, and prospects'.
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Affiliation(s)
- P Müller
- Department of Statistics and Data Sciences, The University of Texas at Austin, 2317 Speedway D9800, Austin, TX 78712-1823, USA
| | - N K Chandra
- Department of Mathematical Sciences, The University of Texas at Dallas, 800 W Campbell Road, Richardson, TX 75080-3021, USA
| | - A Sarkar
- Department of Statistics and Data Sciences, The University of Texas at Austin, 2317 Speedway D9800, Austin, TX 78712-1823, USA
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8
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Purtschert R, Love AJ, Jiang W, Lu ZT, Yang GM, Fulton S, Wohling D, Shand P, Aeschbach W, Bröder L, Müller P, Tosaki Y. Residence times of groundwater along a flow path in the Great Artesian Basin determined by 81Kr, 36Cl and 4He: Implications for palaeo hydrogeology. Sci Total Environ 2023; 859:159886. [PMID: 36347287 DOI: 10.1016/j.scitotenv.2022.159886] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/28/2022] [Accepted: 10/28/2022] [Indexed: 06/16/2023]
Abstract
Understanding the age distribution of groundwater can provide information on both the recharge history as well as the geochemical evolution of groundwater flow systems. Of the few candidates available that can be used to date old groundwater, 81Kr shows the most promise because its input function is constant through time and there are less sources and sinks to complicate the dating procedure in comparison to traditional tracers such as 36Cl and 4He. In this paper we use 81Kr in a large groundwater basin to obtain a better understanding of the residence time distribution of an unconfined-confined aquifer system. A suite of environmental tracers along a groundwater flow path in the south-west Great Artesian Basin of Australia have been sampled. All age tracers (85Kr, 39Ar 14C, 81Kr, 36Cl and 4He) display a consistent increase in groundwater age with distance from the recharge area indicating the presence of a connected flow path. Assuming that 81Kr is the most accurate dating technique the 36Cl/Cl systematics was unravelled to reveal information on recharge mechanism and chloride concentration at the time of recharge. Current-day recharge occurs via ephemeral river recharge beneath the Finke River, while diffuse recharge is minor in the young groundwaters. Towards the end of the transect the influence of ephemeral recharge is less while diffuse recharge and the initial chloride concentration at recharge were higher.
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Affiliation(s)
- R Purtschert
- Climate and Environmental Physics, University of Bern, Switzerland.
| | - A J Love
- College of Science and Engineering and the NCGRT, Flinders University, Adelaide, Australia
| | - W Jiang
- University of Science and Technology of China, Hefei, China
| | - Z-T Lu
- University of Science and Technology of China, Hefei, China
| | - G-M Yang
- University of Science and Technology of China, Hefei, China
| | - S Fulton
- Fulton Independent Consultant, Australia
| | - D Wohling
- Innovative Groundwater Solutions, Wayville, Australia
| | - P Shand
- College of Science and Engineering and the NCGRT, Flinders University, Adelaide, Australia
| | - W Aeschbach
- Institute of Environmental Physics, Heidelberg University, Germany
| | - L Bröder
- Institute of Environmental Physics, Heidelberg University, Germany
| | - P Müller
- ATTA Laboratory, Argonne National Laboratory, USA
| | - Y Tosaki
- Geological Survey of Japan, AIST, Tsukuba, Ibaraki 305-8567, Japan
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9
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Müller P, Bagdasarova Y, Hong R, Leredde A, Bailey KG, Fléchard X, García A, Graner B, Knecht A, Naviliat-Cuncic O, O'Connor TP, Sternberg MG, Storm DW, Swanson HE, Wauters F, Zumwalt DW. β-Nuclear-Recoil Correlation from ^{6}He Decay in a Laser Trap. Phys Rev Lett 2022; 129:182502. [PMID: 36374704 DOI: 10.1103/physrevlett.129.182502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 05/12/2022] [Accepted: 06/01/2022] [Indexed: 06/16/2023]
Abstract
We report the first precise measurement of a β-recoil correlation from a radioactive noble gas (^{6}He) confined via a magneto-optical trap. The measurement is motivated by the search for exotic tensor-type contributions to the charged weak current. Interpreted as tensor currents with right-handed neutrinos, the measurements yield |C_{T}/C_{A}|^{2}≤0.022 (90% confidence limit, C.L.). On the other hand, for left-handed neutrinos the limits are 0.007<C_{T}/C_{A}<0.111 (90% C.L.). The sensitivity of the present measurement is mainly limited by experimental uncertainties in determining the time response properties and the distance between the atom cloud and the microchannel plate used for recoil ion detection.
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Affiliation(s)
- P Müller
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Y Bagdasarova
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - R Hong
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - A Leredde
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - K G Bailey
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - X Fléchard
- Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - A García
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - B Graner
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - A Knecht
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
- Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - O Naviliat-Cuncic
- Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
- National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - T P O'Connor
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - M G Sternberg
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - D W Storm
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - H E Swanson
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - F Wauters
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
| | - D W Zumwalt
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
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10
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Müller P, Breuer E, Tschuor C, Saint-Marc O, Keck T, Coratti A, De Oliveira M, Allen P, Giulianotti P, Oberkofler C, Nickel F, Groot Koerkamp B, Martinie J, Yeo C, Hackert T, Petrowsky H, He J, Boggi U, Borel-Rinkes IH, Clavien PA. Robotic distal pancreatectomy, a novel standard of care? First benchmark values for surgical outcomes from 14 international expert centers. Br J Surg 2022. [DOI: 10.1093/bjs/znac178.006] [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: 11/14/2022]
Abstract
Abstract
Objective
Robotic distal pancreatectomy (DP) is emerging as the preferred treatment for body and tail tumors of the pancreas. To enable conclusive comparisons with the standard open or laparoscopic approaches and robotic surgery among centers, novel benchmark outcome values are urgently needed. Therefore, the aim of this study was to identify benchmark values from expert centers beyond the learning curve.
Methods
This multicenter study analyzed outcomes from consecutive patients undergoing robotic DP for resectable malignant or benign lesions from 14 international expert centers. After the learning curve, defined as the first 10 cases of robotic DP, all consecutive patients were included from the start of the program up to June 2020 with a minimum follow-up of 1 year. Benchmark patients were those without significant comorbidities including obesity (BMI >35 kg/m2) cardiac disease, chronic pulmonary disease.
Benchmark cutoff values were derived from the 75th or the 25th percentile of the median values of all benchmark centers.
Results
After reaching the learning curve, 289 (47%) of a total of 614 consecutive patients qualified as benchmark cases. The proportion of benchmark patients varied between 24%-64% per center. Benchmark cut-offs showed a low 6 month- postoperative mortality (<0.6%), but high overall morbidity (<58.3%). Benchmark cutoffs for operative time (<300 min), conversion rate (<3%), clinically relevant pancreatic fistulas (<26.9%), CCI at 90-days (<14.8), hospital stay (<7 days) and readmission rate (<22.9%). Benchmark cut-offs for complications remained unchanged after 3 months follow-up. For ductal adenocarcinoma benchmark cutoffs for number of lymph nodes were > 19 with an R0 resection rate of > 85%, and an overall survival of >86% and >52% after 1- and 5-years, respectively. Centers with a low cohort of benchmark patients (more difficult cases) had less clinically relevant pancreatic fistula (9% vs. 23%) and less overall complications (32% vs. 48%).
Conclusion
This benchmark analysis sets novel reference values for robotic DP, indicating favorable outcomes as compared to laparoscopic and open DP. These references values may serve for quality control of surgery in centers embarking in robotic DP, and include the procedure in the standard of care.
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Affiliation(s)
- P Müller
- Department of Visceral and Transplant Surgery, University Hospital Zurich , Zurich, Switzerland
| | - E Breuer
- Department of Visceral and Transplant Surgery, University Hospital Zurich , Zurich, Switzerland
| | - C Tschuor
- Department of Surgery and Transplantation, Rigshospitalet Copenhagen University Hospital , Copenhagen, Denmark
| | - O Saint-Marc
- Department of Surgrey, Hospital Orléans , Orléans, France
| | - T Keck
- Department of Surgery, University Clinic Schleswig-Holstein , Lübeck, Germany
| | - A Coratti
- Division of General and Minimally Invasive Surgery, Misericordia Hospital of Grosseto , Grosseto, Italy
| | - M De Oliveira
- Department of Visceral and Transplant Surgery, University Hospital Zurich , Zurich, Switzerland
| | - P Allen
- Department of Surgery, Duke University Medical Center , Durham, United Kingdom
| | - P Giulianotti
- Department of Surgery, The University of Illinois Medical Center , Chicago, USA
| | - C Oberkofler
- Department of Visceral and Transplant Surgery, University Hospital Zurich , Zurich, Switzerland
| | - F Nickel
- Department of Surgery and Transplantation, University Hospital Heidelberg , Heidelberg, Germany
| | | | - J Martinie
- Department of Surgery, Carolinas Medical Center , Charlotte, USA
| | - C Yeo
- Department of Surgery, Sidney Kimmel Medical College , Philadelphia, USA
| | - T Hackert
- Department of Surgery and Transplantation, University Hospital Heidelberg , Heidelberg, Germany
| | - H Petrowsky
- Department of Visceral and Transplant Surgery, University Hospital Zurich , Zurich, Switzerland
| | - J He
- Department of Surgery, Johns Hopkins University School of Medicine , Baltimore, USA
| | - U Boggi
- Department of Surgery, University of Pisa , Pisa, Italy
| | - I H Borel-Rinkes
- Department of Surgery, University Medical Centre Utrecht , Utrecht, The Netherlands
| | - P-A Clavien
- Department of Visceral and Transplant Surgery, University Hospital Zurich , Zurich, Switzerland
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11
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Maksymenko K, Skokowa J, Lupas AN, Aghaallaei N, Müller P, ElGamacy M. De novo design of growth factor inhibiting proteins. KLINISCHE PADIATRIE 2022. [DOI: 10.1055/s-0042-1748729] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- K Maksymenko
- Max Planck Institute for Biology, Tübingen,
Germany
| | - J Skokowa
- University Hospital Tübingen, Tübingen,
Germany
| | - AN Lupas
- Max Planck Institute for Biology, Tübingen,
Germany
| | | | | | - M ElGamacy
- Max Planck Institute for Biology, Tübingen,
Germany
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12
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Müller P, Kondruweit M, Harig F, Tandler R, Rösch J, Weyand M, Heim C. Prophylactic Implantation of Intra-aortic Balloon Counterpulsation in High-Risk Cardiac Surgery Patients: A Single-Center Experience. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742823] [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: 10/19/2022]
Affiliation(s)
- P. Müller
- University of Erlangen-Nuremberg, Erlangen, Deutschland
| | - M. Kondruweit
- Department of Cardiac Surgery, University Clinic Erlangen, Erlangen, Deutschland
| | - F. Harig
- Herzchirurgie des Uni-Klinikums Erlangen, Krankenhausstraße, Erlangen, Germany, Erlangen, Deutschland
| | - R. Tandler
- University Hospital Erlangen, Erlangen, Deutschland
| | - J. Rösch
- Cardiac Surgery of the University Hospital Erlangen, Erlangen, Deutschland
| | - M. Weyand
- Department of Cardiac Surgery, University Clinic Erlangen, Erlangen, Deutschland
| | - C. Heim
- Krankenhausstraße 12, Erlangen, Deutschland
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13
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Borilova S, Fabian P, Zdrazilova Dubska L, Müller P, Kiss I, Vyzula R, Grell P. 41P Predicting response to checkpoint inhibitors using complex molecular characteristics and immunoprofiling in solid tumours. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.10.057] [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: 10/19/2022] Open
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14
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Klaus B, Müller P, van Wickeren N, Dordevic M, Schmicker M, Vielhaber S, Schreiber S, Müller N. P 44. Structural and functional brain alterations in patients with myasthenia gravis. Clin Neurophysiol 2021. [DOI: 10.1016/j.clinph.2021.02.362] [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: 10/20/2022]
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15
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Gloor S, Misirlic M, Frei-Lanter C, Herzog P, Müller P, Schäfli-Thurnherr J, Schregel D, Lamdark T, Wyss R, Unger I, Gisi D, Greco N, Mungo G, Wirz M, Raptis DA, Tschuor C, Breitenstein S. Prehabilitation in patients undergoing colorectal surgery fails to confer reduction in overall morbidity: Results of a single-center, single-blinded, randomized controlled trial. Br J Surg 2021. [DOI: 10.1093/bjs/znab202.015] [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: 11/13/2022]
Abstract
Abstract
Objective
Patients undergoing major surgery are prone to a functional decline due to the impairment of muscle, cardiorespiratory and neurological function as a response to surgical stress. Currently, there are solely weak recommendations in the ERAS protocol regarding the role of preoperative physical activity and prehabilitation in patients undergoing colorectal surgery. Studies in heterogenous cohorts showed contradictory results regarding the impact of prehabilitation on the reduction of postoperative complications. This randomized controlled trial assesses the impact of prehabilitation on postoperative complications in patients undergoing colorectal surgery within an ERAS protocol.
Methods
Between July 2016 and June 2019, a single-center, single-blinded , randomized controlled trial designed to test whether physiotherapeutic prehabilitation vs. normal physical activities prior to colorectal surgery may decrease morbidity within a stringent ERAS protocol was carried out. The primary endpoint was postoperative complications assessed by Comprehensive Complications Index (CCI®). Primary and secondary endpoints for both groups were analyzed and compared.
Results
A total of 107 patients (54 in the pERACS and 53 in the control cohort) were included in the study and randomized. Dropout rate was 4.5% (n = 5). Mean age (SD) in the control cohort was 65 (29–86) and 66 (24–90) years in pERACS cohort. The pERACS cohort contained more female patients (40% vs. 55%, p = 0.123) and a higher percentage of colorectal adenocarcinoma (32% vs. 23%, p = 0.384) although not significant. Almost all patients underwent minimally invasive surgery in both cohorts (96% vs 98%, p = 1.000). There was no between-cohort difference in the primary outcome measure 30-day Comprehensive Complications Index (15 [0 – 49] vs. 18 [0 – 43], p = 0.059). Secondary outcome as complications assessed according to Clavien-Dindo, length of hospital stay, reoperation rate and mortality showed no difference between both cohorts.
Conclusion
Routine physiotherapeutic prehabilitation cannot be recommended for patients undergoing colorectal surgery within an ERAS protocol (Grade A recommendation). To eliminate other confounders like geographical difference or difference in surgical technique, further multicenter RCTs are needed.
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Affiliation(s)
- S Gloor
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, Bern, Switzerland
| | - M Misirlic
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - C Frei-Lanter
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
- Department of Surgery, Hospital Zollikerberg, Zollikerberg, Switzerland
| | - P Herzog
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - P Müller
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - J Schäfli-Thurnherr
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - D Schregel
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - T Lamdark
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - R Wyss
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - I Unger
- Institute of Physiotherapy, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - D Gisi
- Institute of Physiotherapy, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - N Greco
- Institute of Physiotherapy, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - G Mungo
- Institute of Physiotherapy, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - M Wirz
- Institute of Physiotherapy, Zurich University of Applied Sciences (ZHAW), Winterthur, Switzerland
| | - D A Raptis
- Department of HPB Surgery and Liver Transplantat, Royal Free Hospital London, London, United Kingdom
- Division of Surgery and Interventional Science, University College London, London, United Kingdom
| | - C Tschuor
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
- Division of Visceral Surgery and Transplantation, University Hospital Zurich, Zurich, Switzerland
| | - S Breitenstein
- Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
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16
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Wendt K, Kratz JV, Lantzsch J, Müller P, Nörtershäuser W, Seibert A, Trautmann N, Waldek A, Zimmer K. Rapid ultratrace determination of 89,90Sr in environmental samples by collinear laser resonance ionization spectrometry / Schneller, empfindlicher Spurennachweis von 89,90Sr in Umweltproben mit kollinearer Laser-Resonanzionisations-Spektrometrie. KERNTECHNIK 2021. [DOI: 10.1515/kern-1996-622-306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Sorigué D, Hadjidemetriou K, Blangy S, Gotthard G, Bonvalet A, Coquelle N, Samire P, Aleksandrov A, Antonucci L, Benachir A, Boutet S, Byrdin M, Cammarata M, Carbajo S, Cuiné S, Doak RB, Foucar L, Gorel A, Grünbein M, Hartmann E, Hienerwadel R, Hilpert M, Kloos M, Lane TJ, Légeret B, Legrand P, Li-Beisson Y, Moulin SLY, Nurizzo D, Peltier G, Schirò G, Shoeman RL, Sliwa M, Solinas X, Zhuang B, Barends TRM, Colletier JP, Joffre M, Royant A, Berthomieu C, Weik M, Domratcheva T, Brettel K, Vos MH, Schlichting I, Arnoux P, Müller P, Beisson F. Mechanism and dynamics of fatty acid photodecarboxylase. Science 2021; 372:372/6538/eabd5687. [PMID: 33833098 DOI: 10.1126/science.abd5687] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 02/17/2021] [Indexed: 12/21/2022]
Abstract
Fatty acid photodecarboxylase (FAP) is a photoenzyme with potential green chemistry applications. By combining static, time-resolved, and cryotrapping spectroscopy and crystallography as well as computation, we characterized Chlorella variabilis FAP reaction intermediates on time scales from subpicoseconds to milliseconds. High-resolution crystal structures from synchrotron and free electron laser x-ray sources highlighted an unusual bent shape of the oxidized flavin chromophore. We demonstrate that decarboxylation occurs directly upon reduction of the excited flavin by the fatty acid substrate. Along with flavin reoxidation by the alkyl radical intermediate, a major fraction of the cleaved carbon dioxide unexpectedly transformed in 100 nanoseconds, most likely into bicarbonate. This reaction is orders of magnitude faster than in solution. Two strictly conserved residues, R451 and C432, are essential for substrate stabilization and functional charge transfer.
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Affiliation(s)
- D Sorigué
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - K Hadjidemetriou
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France
| | - S Blangy
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - G Gotthard
- European Synchrotron Radiation Facility, 38043 Grenoble, France
| | - A Bonvalet
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - N Coquelle
- Large-Scale Structures Group, Institut Laue Langevin, 38042 Grenoble Cedex 9, France
| | - P Samire
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France.,Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - A Aleksandrov
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - L Antonucci
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - A Benachir
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - S Boutet
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - M Byrdin
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France
| | - M Cammarata
- Department of Physics, UMR UR1-CNRS 6251, University of Rennes 1, F-Rennes, France.
| | - S Carbajo
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - S Cuiné
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - R B Doak
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - L Foucar
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - A Gorel
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - M Grünbein
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - E Hartmann
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - R Hienerwadel
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - M Hilpert
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - M Kloos
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany.
| | - T J Lane
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - B Légeret
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - P Legrand
- Synchrotron SOLEIL. L'Orme des Merisiers Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - Y Li-Beisson
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - S L Y Moulin
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - D Nurizzo
- European Synchrotron Radiation Facility, 38043 Grenoble, France
| | - G Peltier
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France
| | - G Schirò
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France
| | - R L Shoeman
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - M Sliwa
- Univ. Lille, CNRS, UMR 8516, LASIRE, LAboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, 59000 Lille, France
| | - X Solinas
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - B Zhuang
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France.,Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - T R M Barends
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - J-P Colletier
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France
| | - M Joffre
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - A Royant
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France.,European Synchrotron Radiation Facility, 38043 Grenoble, France
| | - C Berthomieu
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France.
| | - M Weik
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France.
| | - T Domratcheva
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany. .,Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - K Brettel
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - M H Vos
- LOB, CNRS, INSERM, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France.
| | - I Schlichting
- Max-Planck-Institut für medizinische Forschung, Jahnstrasse 29, 69120 Heidelberg, Germany.
| | - P Arnoux
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France.
| | - P Müller
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France.
| | - F Beisson
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies, BIAM Cadarache, 13108 Saint-Paul-lez-Durance, France.
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Mergenthaler M, Paredes S, Müller P, Müller C, Filipp S, Sandberg M, Hertzberg JB, Adiga VP, Brink M, Fuhrer A. Ultrahigh vacuum packaging and surface cleaning for quantum devices. Rev Sci Instrum 2021; 92:025121. [PMID: 33648100 DOI: 10.1063/5.0034574] [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: 10/21/2020] [Accepted: 01/30/2021] [Indexed: 06/12/2023]
Abstract
We describe design, implementation, and performance of an ultra-high vacuum (UHV) package for superconducting qubit chips or other surface sensitive quantum devices. The UHV loading procedure allows for annealing, ultra-violet light irradiation, ion milling, and surface passivation of quantum devices before sealing them into a measurement package. The package retains vacuum during the transfer to cryogenic temperatures by active pumping with a titanium getter layer. We characterize the treatment capabilities of the system and present measurements of flux tunable qubits with an average T1 = 84 µs and T2 echo=134μs after vacuum-loading these samples into a bottom loading dilution refrigerator in the UHV-package.
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Affiliation(s)
- M Mergenthaler
- IBM Quantum, IBM Research Europe-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - S Paredes
- IBM Quantum, IBM Research Europe-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - P Müller
- IBM Quantum, IBM Research Europe-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - C Müller
- IBM Quantum, IBM Research Europe-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - S Filipp
- IBM Quantum, IBM Research Europe-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - M Sandberg
- IBM Quantum, IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA
| | - J B Hertzberg
- IBM Quantum, IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA
| | - V P Adiga
- IBM Quantum, IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA
| | - M Brink
- IBM Quantum, IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA
| | - A Fuhrer
- IBM Quantum, IBM Research Europe-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
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Ayton H, Rough S, Sutcliffe M, Müller P, Schäfer J, Wilson D. Measurement and modelling of wall friction in the ram extrusion of stiff microcrystalline cellulose-based pastes. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.08.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Müller P, Rösch J, Griesbach C, Weyand M, Harig F. Cannulation of the Brachiocephalic Trunk Reduces Neurological Complications in Elective Thoracic Aortic Surgery and Acute Type A Aortic Dissections: A Retrospective Analysis of a 20-Year Single-Center Experience. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725632] [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: 10/21/2022]
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21
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Abstract
UNLABELLED In emergency situations, every minute counts. Therefore, staff of emergency medical services (EMS) require easily accessible sources of information to organize and coordinate their work as quickly as possible. Digital dashboards can visualize various information at a glance and have thus potential to meet this need. We developed in cooperation with the Emmental Hospital a prototype of a dashboard, which aims to improve organizational aspects of the EMS. METHOD A literature search was conducted in PubMed, IEEE and ACM. The goal was to identify design principles for dashboards. Additionally, several interviews and meetings were held with the EMS staff of the Emmental Hospital and with those of another hospital. The aim was to identify requirements of the EMS staff towards such an organizational dashboard and to transform them into use cases. RESULTS Considering the collected requirements and standards of dashboard design, a prototype of a dashboard was developed. It consists of several modules that show relevant information items such as news or traffic information. Due to this modular development, content is easily interchangeable. The most important information for the EMS is shown on the dashboard aiming at saving time for information gathering. CONCLUSION A digital dashboard offers many advantages and optimization possibilities compared to an analog whiteboard. For example, such a dashboard can be connected to other systems and data can be automatically included. Although we developed our dashboard in cooperation with the EMS of a specific hospital, it can easily be applied and adjusted to other EMS. As a next step, we will perform usability tests with the prototype and start implementing the dashboard.
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Zahouli J, Koudou B, Müller P, Utzinger J. Urbanisation is a main driver for Aedes aegypti dynamics and arboviral risk in Côte d’Ivoire. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa165.714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Aedes mosquito-borne arboviruses have (re-)emerged and caused considerable public health concerns in major sub-Saharan African cities subjected to rapid urbanisation. We assessed the effects of urbanisation on Aedes aegypti dynamics and biting pattern, and the risk of transmission of yellow fever (YF) and dengue (DEN) viruses along urban-rural gradient in Côte d'Ivoire.
Methods
We collected Aedes mosquitoes as eggs, larvae/pupae, and adults seasonally in urban, suburban and rural areas using ovitrap, larval survey and human-baited double net trap methods from January 2015 to December 2016. We sampled household data and characterised Aedes larval breeding sites. Ae. aegypti indices and biting rates were compared by area.
Results
Ae. aegypti was the most abundant species in all areas. It showed higher abundance in urban areas (n = 26,072; 99.4%). Larval indices were associated with human activities, including waste and water management. Tires and discarded containers were the most productive breeding sites in all areas. Household water receptacles displayed high Aedes-positive rate (23.6%) in urban areas. Positive ovitrap index was higher in urban (53.5%) compared to suburban (43.1%) and rural (29.7%). Stegomyia indices were highest in urban followed by suburban and rural areas, with respective house index of 67.2, 51.4 and 27.8, container index of 57.1, 43.5 and 19.7, and Breteau index of 95.2, 78.9 and 8.8. Biting rate was 4.3 and 2.7-fold higher in urban (83.5 bite/person/day) and suburban (52.1 bite/person/day) compared to rural (19.4 bite/person/day), respectively. Ae. aegypti indices were higher during rainy seasons.
Conclusions
In Côte d'Ivoire, urbanisation raised Ae. aegypti abundance and biting rate. As a result, YF and DEN risk indices were above WHO-established epidemic thresholds in urban area thus exposing local communities to high risk of getting diseases. Integrated community-based vector control programs should be applied to reduce arboviral risk.
Key messages
Urbanisation raises Aedes aegypti abundance and arboviral disease risk in Côte d’Ivoire. Integrated community clean-up actions are required to control Aedes vectors.
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Affiliation(s)
- J Zahouli
- Department of Research and Development, Swiss Centre for Scientific Research in Côte d'Ivoire, Abidjan, Cote d'Ivoire
- Medical Entomology and Veterinary Centre, Allassane ouattara University, Bouake, Cote d'Ivoire
| | - B Koudou
- Department of Research and Development, Swiss Centre for Scientific Research in Côte d'Ivoire, Abidjan, Cote d'Ivoire
| | - P Müller
- Departement of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - J Utzinger
- Departement of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
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Müller P, Tan CK, Ißleib U, Paßvogel L, Eilts B, Steinhauer K. Investigation of the susceptibility of Candida auris and Candida albicans to chemical disinfectants using European Standards EN 13624 and EN 16615. J Hosp Infect 2020; 105:648-656. [PMID: 32454076 DOI: 10.1016/j.jhin.2020.05.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/18/2020] [Indexed: 11/19/2022]
Abstract
BACKGROUND Since the first appearance of Candida auris in 2009, this yeast has become a relevant pathogen in the clinical field. C. auris has been detected on various surfaces in health facilities, and is therefore a target for appropriate disinfection procedures. Preventive measures have to be implemented based on disinfectants with proven efficacy against C. auris. AIM The chemical tolerance of C. auris was compared with the surrogate test organism Candida albicans as established in the European standards (EN). In this way, conclusions will be drawn as to whether the disinfectants tested according to EN 13624 and EN 16615 are at least equally effective against C. auris. METHODS The chemical susceptibility of C. auris and C. albicans was investigated using standardized EN test protocols. EN 13624 and EN 16615 were used in this study to examine two commercially available surface disinfectants based on alcohol and quaternary ammonium compounds (QACs), respectively. In addition, the survival rates of the two yeast species were studied on a defined test surface simulating practical conditions. FINDINGS In comparison with C. albicans, C. auris was found to be significantly more susceptible to the alcohol- and QAC-based disinfectants used in this study. C. albicans was found to be more tolerant to drying on the test surface in EN 16615, yielding higher recovery rates. CONCLUSION C. albicans is a suitable surrogate test organism when targeting yeasticidal efficacy, which, based on EN 13624 and EN 16615, includes efficacy against the human pathogen C. auris.
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Affiliation(s)
- P Müller
- Department of Life Sciences, Albstadt-Sigmaringen University, Sigmaringen, Germany; Department of Research and Scientific Services, Schülke & Mayr GmbH, Norderstedt, Germany
| | - C K Tan
- Department of Research and Scientific Services, Schülke & Mayr GmbH, Norderstedt, Germany
| | - U Ißleib
- Department of Research and Scientific Services, Schülke & Mayr GmbH, Norderstedt, Germany
| | - L Paßvogel
- Department of Research and Scientific Services, Schülke & Mayr GmbH, Norderstedt, Germany
| | - B Eilts
- Department of Life Sciences, Albstadt-Sigmaringen University, Sigmaringen, Germany
| | - K Steinhauer
- Department of Research and Scientific Services, Schülke & Mayr GmbH, Norderstedt, Germany.
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Windpessl M, Müller P. Non-traumatic rupture of the biceps tendon: consider the medical causes. QJM 2020; 113:377-378. [PMID: 31899516 DOI: 10.1093/qjmed/hcz331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Windpessl
- Fourth Department of Medicine, Klinikum Wels-Grieskirchen, Grieskirchnerstrasse 42, Wels 4600, Austria
| | - P Müller
- Department of Neurology, Klinikum Wels-Grieskirchen, Grieskirchnerstrasse 42, Wels 4600, Austria
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Müller P, Vellage A, Schmicker M, Menze I, Müller N. P63 Substantia nigra integrity as a predictor of galantamine response on working memory performance in healthy older adults – A randomized controlled double-blinded crossover study. Clin Neurophysiol 2020. [DOI: 10.1016/j.clinph.2019.12.066] [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: 10/24/2022]
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Leroy F, El Barraj A, Cheynis F, Müller P, Curiotto S. Atomic Transport in Au-Ge Droplets: Brownian and Electromigration Dynamics. Phys Rev Lett 2019; 123:176101. [PMID: 31702228 DOI: 10.1103/physrevlett.123.176101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Indexed: 06/10/2023]
Abstract
The deposition of Au on Ge(111)-sqrt[3]×sqrt[3]-Au above the eutectic temperature results in the formation of AuGe liquid droplets that reach the liquidus composition by digging a hole in the Ge substrate. The combination of low-energy electron microscopy and atomic force microscopy measurements shows that AuGe droplets randomly migrate or electromigrate under an applied electric current dragging their underneath hole. The droplet motion is due to a mass transport phenomenon based on Ge dissolution at the droplet front and Ge crystallization at its rear. At high temperature the mass transport is limited by attachment or detachment at the solid-liquid interface and the activation energy is 1.05±0.3 eV. At low temperature the effective activation energy increases as a function of the droplet radius. This behavior is attributed to the nucleation of 2D layers at the faceted liquid-solid interface.
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Affiliation(s)
- F Leroy
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
| | - A El Barraj
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
| | - F Cheynis
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
| | - P Müller
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
| | - S Curiotto
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
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Schwarck S, Müller P, Rehfeld K, Müller N. FV 44 Interindividual differences in cognitive response to acute exercise – A randomized controlled cross-over study. Clin Neurophysiol 2019. [DOI: 10.1016/j.clinph.2019.04.649] [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: 11/17/2022]
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Hunziker L, Radovanovic D, Jeger R, Pedrazzini G, Cuculi F, Urban P, Erne P, Rickli H, Pilgrim T, Hess F, Simon R, Hangartner P, Hufschmid U, Hornig B, Altwegg L, Trummler S, Windecker S, Rueff T, Loretan P, Roethlisberger C, Evéquoz D, Mang G, Ryser D, Müller P, Jecker R, Kistler W, Hongler T, Stäuble S, Freiwald G, Schmid H, Stauffer J, Cook S, Bietenhard K, Roffi M, Wojtyna W, Schönenberger R, Simonin C, Waldburger R, Schmidli M, Federspiel B, Weiss E, Marty H, Weber K, Zender H, Poepping I, Hugi A, Koltai E, Iglesias J, Erne P, Heimes T, Jordan B, Pagnamenta A, Feraud P, Beretta E, Stettler C, Repond F, Widmer F, Heimgartner C, Polikar R, Bassetti S, Iselin H, Giger M, Egger P, Kaeslin T, Fischer A, Herren T, Eichhorn P, Neumeier C, Flury G, Girod G, Vogel R, Niggli B, Yoon S, Nossen J, Stoller U, Veragut U, Bächli E, Weber A, Schmidt D, Hellermann J, Eriksson U, Fischer T, Peter M, Gasser S, Fatio R, Vogt M, Ramsay D, Wyss C, Bertel O, Maggiorini M, Eberli F, Christen S. Twenty-Year Trends in the Incidence and Outcome of Cardiogenic Shock in AMIS Plus Registry. Circ Cardiovasc Interv 2019; 12:e007293. [DOI: 10.1161/circinterventions.118.007293] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [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: 11/16/2022]
Affiliation(s)
- Lukas Hunziker
- Department of Cardiology, Bern University Hospital, Switzerland (L.H., T.P.)
| | - Dragana Radovanovic
- AMIS Plus Data Center, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Switzerland (D.R.)
| | - Raban Jeger
- Division of Cardiology, University Hospital Basel, Switzerland (R.J.)
| | | | - Florim Cuculi
- Heart Centre Lucerne, Luzerner Kantonsspital, Switzerland (F.C.)
| | - Philip Urban
- Cardiology Department, La Tour Hospital, Geneva, Switzerland (P.U.)
| | - Paul Erne
- Department of Biomedicine, University of Basel, Switzerland (P.E.)
| | - Hans Rickli
- Department of Cardiology, Kantonsspital St. Gallen, Switzerland (H.R.)
| | - Thomas Pilgrim
- Department of Cardiology, Bern University Hospital, Switzerland (L.H., T.P.)
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Schreiber L, Urbiola C, Spiesschaert B, Kimpel J, Heinemann F, Stierstorfer B, Müller P, Erlmann P, Petersson M, von Laer D, Wollmann G. Oncolysis dominated therapeutic effect of LCMV-GP – pseudotyped vesicular stomatitis virus in a syngeneic lung cancer model. Eur J Cancer 2019. [DOI: 10.1016/j.ejca.2019.01.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Toe KH, Müller P, Badolo A, Traore A, Sagnon N, Dabiré RK, Ranson H. Do bednets including piperonyl butoxide offer additional protection against populations of Anopheles gambiae s.l. that are highly resistant to pyrethroids? An experimental hut evaluation in Burkina Fasov. Med Vet Entomol 2018; 32:407-416. [PMID: 29998497 DOI: 10.1111/mve.12316] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/24/2018] [Accepted: 05/12/2018] [Indexed: 05/12/2023]
Abstract
Malaria control is dependent on the use of longlasting insecticidal nets (LLINs) containing pyrethroids. A new generation of LLINs containing both pyrethroids and the synergist piperonyl butoxide (PBO) has been developed in response to increasing pyrethroid resistance in African malaria vectors, but questions remain about the performance of these nets in areas where levels of pyrethroid resistance are very high. This study was conducted in two settings in southwest Burkina Faso, Vallée du Kou 5 and Tengrela, where Anopheles gambiae s.l. (Diptera: Culicidae) mortality rates in World Health Organization (WHO) discriminating dose assays were < 14% for permethrin and < 33% for deltamethrin. When mosquitoes were pre-exposed to PBO in WHO tube assays, mortality rates increased substantially but full susceptibility was not restored. Molecular characterization revealed high levels of kdr alleles and elevated levels of P450s previously implicated in pyrethroid resistance. In cone bioassays and experimental huts, PBO LLINs outperformed the pyrethroid-only equivalents from the same manufacturers. Blood feeding rates were 1.6-2.2-fold lower and mortality rates were 1.69-1.78-fold greater in huts with PBO LLINs vs. non-PBO LLINs. This study indicates that PBO LLINs provide greater personal and community-level protection than standard LLINs against highly pyrethroid-resistant mosquito populations.
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Affiliation(s)
- K H Toe
- Département des Sciences Biomédicales, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - P Müller
- Epidemiology and Public Health Department, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - A Badolo
- Département des Sciences Biomédicales, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - A Traore
- Département des Sciences Biomédicales, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - N Sagnon
- Département des Sciences Biomédicales, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - R K Dabiré
- Department of Medical Biology and Public Health, Institut de Recherche en Science de la Santé, Bobo-Dioulasso, Burkina Faso
| | - H Ranson
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, U.K
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Wollmann G, Schreiber LM, Urbiola C, Das K, Spiesschaert B, Kimpel J, Heinemann F, Stierstorfer B, Müller P, Petersson M, Erlmann P, von Laer D. Oncolysis dominated therapeutic effect of LCMV-GP – pseudotyped vesicular stomatitis virus in a syngeneic lung cancer model. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy487.037] [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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Girardo S, Träber N, Wagner K, Cojoc G, Herold C, Goswami R, Schlüßler R, Abuhattum S, Taubenberger A, Reichel F, Mokbel D, Herbig M, Schürmann M, Müller P, Heida T, Jacobi A, Ulbricht E, Thiele J, Werner C, Guck J. Standardized microgel beads as elastic cell mechanical probes. J Mater Chem B 2018; 6:6245-6261. [PMID: 32254615 DOI: 10.1039/c8tb01421c] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cell mechanical measurements are gaining increasing interest in biological and biomedical studies. However, there are no standardized calibration particles available that permit the cross-comparison of different measurement techniques operating at different stresses and time-scales. Here we present the rational design, production, and comprehensive characterization of poly-acrylamide (PAAm) microgel beads mimicking size and overall mechanics of biological cells. We produced mono-disperse beads at rates of 20-60 kHz by means of a microfluidic droplet generator, where the pre-gel composition was adjusted to tune the beads' elasticity in the range of cell and tissue relevant mechanical properties. We verified bead homogeneity by optical diffraction tomography and Brillouin microscopy. Consistent elastic behavior of microgel beads at different shear rates was confirmed by AFM-enabled nanoindentation and real-time deformability cytometry (RT-DC). The remaining inherent variability in elastic modulus was rationalized using polymer theory and effectively reduced by sorting based on forward-scattering using conventional flow cytometry. Our results show that PAAm microgel beads can be standardized as mechanical probes, to serve not only for validation and calibration of cell mechanical measurements, but also as cell-scale stress sensors.
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Affiliation(s)
- S Girardo
- Biotechnology Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Tatzberg 47/49, 01307 Dresden, Germany.
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Müller P, Rehfeld K, Schmicker M, Müller N. P52. Future directions for physical exercise as personalized medicine. Clin Neurophysiol 2018. [DOI: 10.1016/j.clinph.2018.04.689] [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: 10/28/2022]
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Schmicker M, Kunz V, Müller P, Dordevic M, Müller N. P73. A new cognitive diagnostic marker to distinguish between Subjective Cognitive Decline, mild cognitive impairment and healthy adults? Clin Neurophysiol 2018. [DOI: 10.1016/j.clinph.2018.04.706] [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: 10/28/2022]
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Kaden J, May G, Schönemann C, Müller P, Groth J, Seeger W, Seibt F, Henkert M, Lippert J. Effect of ATG prophylaxis in sensitized and non-sensitized kidney graft recipients. Transpl Int 2018. [DOI: 10.1111/tri.1992.5.s1.75] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Herbig M, Mietke A, Müller P, Otto O. Statistics for real-time deformability cytometry: Clustering, dimensionality reduction, and significance testing. Biomicrofluidics 2018; 12:042214. [PMID: 29937952 PMCID: PMC5999349 DOI: 10.1063/1.5027197] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/21/2018] [Indexed: 06/08/2023]
Abstract
Real-time deformability (RT-DC) is a method for high-throughput mechanical and morphological phenotyping of cells in suspension. While analysis rates exceeding 1000 cells per second allow for a label-free characterization of complex biological samples, e.g., whole blood, data evaluation has so far been limited to a few geometrical and material parameters such as cell size, deformation, and elastic Young's modulus. But as a microscopy-based technology, RT-DC actually generates and yields multidimensional datasets that require automated and unbiased tools to obtain morphological and rheological cell information. Here, we present a statistical framework to shed light on this complex parameter space and to extract quantitative results under various experimental conditions. As model systems, we apply cell lines as well as primary cells and highlight more than 11 parameters that can be obtained from RT-DC data. These parameters are used to identify sub-populations in heterogeneous samples using Gaussian mixture models, to perform a dimensionality reduction using principal component analysis, and to quantify the statistical significance applying linear mixed models to datasets of multiple replicates.
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Affiliation(s)
- M. Herbig
- Biotechnology Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, 01307 Dresden, Germany
| | | | - P. Müller
- Biotechnology Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, 01307 Dresden, Germany
| | - O. Otto
- Author to whom the correspondence should be addressed:
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Heim C, Müller P, Tandler R, Cherikh W, Toll A, Kucheryavaya A, Kush K, Weyand M, Ensminger S. Cytomegalovirus Donor Seropositivity Negatively Affects Mid- and Long-term Survival After Heart Transplantation. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Uhlig D, Spange S, Seifert A, Nagel K, Anders S, Kroll L, Stoll R, Thielbeer F, Müller P, Schreiter K. Design of nanostructured hybrid materials: twin polymerization of urethane-based twin prepolymers. RSC Adv 2018; 8:31673-31681. [PMID: 35548201 PMCID: PMC9085902 DOI: 10.1039/c8ra05310c] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/04/2018] [Indexed: 11/30/2022] Open
Abstract
Organic–inorganic hybrid materials with urethane functionalities were obtained by simultaneous twin polymerization of twin prepolymers in combination with the ideal twin monomer 2,2′-spirobi[4H-1,3,2-benzodioxasiline]. The twin prepolymers consist of a urethane-based prepolymer with reactive terminal groups which can react during the twin polymerization process. Nanostructured hybrid materials with integrated dialkylsiloxane crosslinked urethane structures, phenolic resin and SiO2 are obtained in a one pot process. The effects of the polymerization temperature as well as those of various catalysts and reagent ratios on the polymerization behavior were investigated. The molecular structures of the obtained materials were determined by 13C- and 29Si-{1H}-CP-MAS NMR spectroscopies. HAADF-STEM-measurements were performed to prove the distribution of silicon in the hybrid material. Organic–inorganic hybrid materials with urethane functionalities were obtained by simultaneous twin polymerization of twin prepolymers in combination with the twin monomer 2,2′-spirobi[4H-1,3,2-benzodioxasiline].![]()
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Affiliation(s)
- D. Uhlig
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - S. Spange
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - A. Seifert
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - K. Nagel
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
| | - S. Anders
- Department of Lightweight Structures and Polymer Technology
- Chemnitz University of Technology
- Faculty of Mechanical Engineering
- D-09107 Chemnitz
- Germany
| | - L. Kroll
- Department of Lightweight Structures and Polymer Technology
- Chemnitz University of Technology
- Faculty of Mechanical Engineering
- D-09107 Chemnitz
- Germany
| | | | | | | | - K. Schreiter
- Department of Polymer Chemistry
- Chemnitz University of Technology
- Faculty of Natural Science
- D-09107 Chemnitz
- Germany
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Isaksson HS, Farkas SA, Müller P, Gustafsson D, Nilsson TK. Whole genome microarray expression analysis in blood identifies pathways linked to signs and symptoms of a patient with hypercalprotectinaemia and hyperzincaemia. Clin Exp Immunol 2017; 191:240-251. [PMID: 28984903 DOI: 10.1111/cei.13064] [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] [Accepted: 09/29/2017] [Indexed: 11/30/2022] Open
Abstract
A child, 2 years with the 'hypercalprotectinaemia with hyperzincaemia' clinical syndrome, presented with atypical symptoms and signs, notably persistent fever of approximately 38°C, thrombocythaemia of > 700 × 109 /l and a predominance of persistent intestinal symptoms. In an effort to find a cure by identifying the dysregulated pathways we analysed whole-genome mRNA expression by the Affymetrix HG U133 Plus 2·0 array in blood on three occasions 3-5 months apart. Major up-regulation was demonstrated for the Janus kinase/signal transducer and activators of transcription (JAK/STAT) pathway including, in particular, CD177, S100A8, S100A9 and S100A12, accounting for the thrombocytosis; a large number of interleukins, their receptors and activators, accounting for the febrile apathic state; and the high mobility group box 1 (HMBG1) gene, possibly accounting for part of the intestinal symptoms. These results show that gene expression array technology may assist the clinician in the diagnostic work-up of individual patients with suspected syndromal states of unknown origin, and the expression data can guide the selection of optimal treatment directed at the identified target pathways.
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Affiliation(s)
- H S Isaksson
- Department of Laboratory Medicine, Örebro University Hospital, Faculty of Medicine and Health, Örebro University, Sweden
| | - S A Farkas
- Department of Laboratory Medicine, Örebro University Hospital, Faculty of Medicine and Health, Örebro University, Sweden
| | - P Müller
- Affymetrix Core Facility at Novum, BEA, Karolinska Institute, Huddinge, Sweden
| | - D Gustafsson
- Department of Pediatrics, Örebro University Hospital, Faculty of Medicine and Health, Örebro University, Umeå, Sweden
| | - T K Nilsson
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
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Cheynis F, Curiotto S, Leroy F, Müller P. Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas. Sci Rep 2017; 7:10642. [PMID: 28878360 PMCID: PMC5587567 DOI: 10.1038/s41598-017-10300-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 08/07/2017] [Indexed: 11/09/2022] Open
Abstract
Fundamental interest for 2D electron gas (2DEG) systems has been recently renewed with the advent of 2D materials and their potential high-impact applications in optoelectronics. Here, we investigate a 2DEG created by the electron transfer from a Ag adatom gas deposited on a Si(111) \documentclass[12pt]{minimal}
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\begin{document}$$\sqrt{{\bf{3}}}{\boldsymbol{\times }}\sqrt{{\bf{3}}}$$\end{document}3×3-Ag surface to an electronic surface state. Using low-energy electron microscopy (LEEM), we measure the Ag adatom gas concentration and the 2DEG-induced charge transfer. We demonstrate a linear dependence of the surface work function change on the Ag adatom gas concentration. A breakdown of the linear relationship is induced by the occurrence of the Ag adatom gas superstructure identified as Si(111) \documentclass[12pt]{minimal}
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\begin{document}$$\sqrt{{\bf{21}}}{\boldsymbol{\times }}\sqrt{{\bf{21}}}$$\end{document}21×21-Ag only observed below room temperature. We evidence below room temperature a confinement of the 2DEG on atomic terraces characterised by spatial inhomogeneities of the 2DEG-induced charge transfer along with temporal fluctuations. These variations mirror the Ag adatom gas concentration changes induced by the growth of 3D Ag islands and the occurrence of an Ehrlich-Schwoebel diffusion barrier of 155 ± 10 meV.
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Affiliation(s)
- F Cheynis
- Aix Marseille Univ, CNRS, CINAM, Marseille, France.
| | - S Curiotto
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
| | - F Leroy
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
| | - P Müller
- Aix Marseille Univ, CNRS, CINAM, Marseille, France
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Rogl G, Legut D, Sýkora R, Müller P, Müller H, Bauer E, Puchegger S, Zehetbauer M, Rogl P. Mechanical properties of non-centrosymmetric CePt 3Si and CePt 3B. J Phys Condens Matter 2017; 29:185402. [PMID: 28272023 DOI: 10.1088/1361-648x/aa655b] [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: 06/06/2023]
Abstract
Elastic moduli, hardness (both at room temperature) and thermal expansion (4.2-670 K) have been experimentally determined for polycrystalline CePt3Si and its prototype compound CePt3B as well as for single-crystalline CePt3Si. Resonant ultrasound spectroscopy was used to determine elastic properties (Young's modulus E and Poisson's ratio ν) via the eigenfrequencies of the sample and the knowledge of sample mass and dimensions. Bulk and shear moduli were calculated from E and ν, and the respective Debye temperatures were derived. In addition, ab initio DFT calculations were carried out for both compounds. A comparison of parameters evaluated from DFT with those of experiments revealed, in general, satisfactory agreement. Positive and negative thermal expansion values obtained from CePt3Si single crystal data are fairly well explained in terms of the crystalline electric field model, using CEF parameters derived recently from inelastic neutron scattering. DFT calculations, in addition, demonstrate that the atomic vibrations keep almost unaffected by the antisymmetric spin-orbit coupling present in systems with crystal structures having no inversion symmetry. This is opposite to electronic properties, where the antisymmetric spin-orbit interaction has shown to distinctly influence features like the superconducting condensate of CePt3Si.
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Affiliation(s)
- G Rogl
- Institute of Materials Chemistry and Research, University of Vienna, Waehringerstr. 42, A-1090 Wien, Austria. Solid State Physics, Vienna University of Technology, Wiedner Hauptstr. 8-10, A-1040 Wien, Austria
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Affiliation(s)
- M Windpessl
- From the Fourth Department of Medicine, Klinikum Wels-Grieskirchen, Grieskirchnerstrasse 42, Wels 4600, Austria
| | - P Müller
- Department of Neurology, Klinikum Wels-Grieskirchen, Grieskirchnerstrasse 42, Wels 4600, Austria
| | - M Wallner
- From the Fourth Department of Medicine, Klinikum Wels-Grieskirchen, Grieskirchnerstrasse 42, Wels 4600, Austria
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Reiniger J, Domdei N, Pfau M, Müller P, Holz F, Harmening W. Adaptive Optiken – Möglichkeiten für die Diagnostik hereditärer Netzhauterkrankungen. Klin Monbl Augenheilkd 2017; 234:311-319. [DOI: 10.1055/s-0043-100631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
ZusammenfassungAdaptive Optiken (AO) stellen eine technologische Schlüsselinnovation für die Bildgebung in der Ophthalmologie dar. Mit AO ausgestattete Ophthalmoskope erlauben es, die mikroskopische Netzhautstruktur nicht invasiv und auf zellulärer Ebene darzustellen. So kann die strukturelle Integrität der retinalen Nervenfaserschicht, des perifovealen Kapillarnetzwerks, einzelner Stäbchen- und Zapfenphotorezeptoren und des zellulären Mosaiks des retinalen Pigmentepithels in vivo beobachtet werden. Für die Beurteilung des Verlaufs von Netzhauterkrankungen, einer möglichen pharmakologischen Intervention und die Entschlüsselung der zugrunde liegenden physiologischen Mechanismen bedeutet dies eine völlig neue Untersuchungsebene. Insbesondere monogenetische Erkrankungen liegen im Fokus der aktuellen Forschung. Zum einen können Rückschlüsse auf einzelne Pathologien anderer multifaktorieller Netzhauterkrankungen gezogen und so die zugrundeliegenden physiologischen Mechanismen bzw. Verläufe genauer untersucht werden (Modellerkrankung). Zum anderen werden auch im Hinblick auf aktuelle und kommende Interventionen (u. a. Gentherapie) neuartige und zuverlässige Endpunkte zur Interpretation des Therapieerfolgs notwendig. Erste kommerzielle AO-Ophthalmoskope sind für den klinischen Einsatz erhältlich, und die Zahl mit AO untersuchter Netzhautpathologien wächst zunehmend. Für eine zellgenaue Struktur-Funktions-Korrelation kann jüngstens eine AO-basierte Mikrostimulationstechnologie eingesetzt werden.
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Affiliation(s)
- J. Reiniger
- Universitäts-Augenklinik Bonn, Universitätsklinikum Bonn
| | - N. Domdei
- Universitäts-Augenklinik Bonn, Universitätsklinikum Bonn
| | - M. Pfau
- Universitäts-Augenklinik Bonn, Universitätsklinikum Bonn
| | - P. Müller
- Universitäts-Augenklinik Bonn, Universitätsklinikum Bonn
| | - F. Holz
- Universitäts-Augenklinik Bonn, Universitätsklinikum Bonn
| | - W. Harmening
- Universitäts-Augenklinik Bonn, Universitätsklinikum Bonn
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Schröter F, Müller K, Müller P, Krause E, Braun BC. Recombinant expression of porcine spermadhesin AWN and its phospholipid interaction: Indication for a novel lipid binding property. Reprod Domest Anim 2017; 52:585-595. [PMID: 28326614 DOI: 10.1111/rda.12953] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 02/07/2017] [Indexed: 01/05/2023]
Abstract
AWN is a porcine (Sus scrofa domestica) seminal plasma protein and has been linked to a variety of processes related to fertilization. To acquire the protein in sufficient amount and purity for functional studies, we established its recombinant expression in E. coli and a three-step purification protocol based on different chromatographies. The test for AWN-phospholipid interaction revealed phosphatidic acid and cardiolipin as potential binding partners. As phosphatidic acid is surmised to play a role in cation-induced membrane destabilization and fusion events, we propose a membrane protective function of the presented binding affinity. Further studies with recombinant AWN will allow new insights into the mechanism of sperm-spermadhesin interaction and might provide new approaches for artificial reproduction techniques.
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Affiliation(s)
- F Schröter
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - K Müller
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - P Müller
- Department of Biology/Biophysics, Humboldt University of Berlin, Berlin, Germany
| | - E Krause
- Department Mass Spectrometry, Leibniz Institute for Molecular Pharmacology, Berlin, Germany
| | - B C Braun
- Department Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
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Müller P, Junge-Hoffmeister J, Weidner K, Croy I. Einfluss von Bindungsstörung auf die taktile Mutter-Kind-Interaktion. Geburtshilfe Frauenheilkd 2017. [DOI: 10.1055/s-0037-1598137] [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: 10/20/2022] Open
Affiliation(s)
- P Müller
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Universitätsklinikum Carl Gustav Carus, Dresden
| | - J Junge-Hoffmeister
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Universitätsklinikum Carl Gustav Carus, Dresden
| | - K Weidner
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Universitätsklinikum Carl Gustav Carus, Dresden
| | - I Croy
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Universitätsklinikum Carl Gustav Carus, Dresden
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Vacek O, Pastorek M, Durech M, Vojtěšek B, Müller P. [Diagnostic and Therapeutic Potential of Membrane HSP90]. Klin Onkol 2017; 30:191-194. [PMID: 28471204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND Heat shock protein (HSP90) is a molecular chaperone involved in maintaining protein homeostasis by modulating stability of de novo synthesized proteins. Neoplastic cells with high metabolic rate have higher expression of HSP90 and develop so called "chaperone addiction". Specific inhibition of HSP90 has been therefore discussed as a viable therapeutic strategy and several inhibitors of HSP90 have already entered clinical trials. Recently, a novel role for HSP90 was found on plasma membrane of cancer cells. Since then, extracellular HSP90 has been implicated in increased tumor invasiveness and metastasis, but better understanding of its regulation is needed to fully explore its potential in early detection of malignity and import of specific HSP90 inhibitors. We have therefore analyzed correlation of extracellular HSP90 level with import of fluorescently-labeled inhibitor of HSP90 and total expression of HSP90. METHODS Flow cytometry was used to analyze cell uptake of FITC-Geldanamycin as well as level of extracellular HSP90, while total expression of HSP90 was analyzed by SDS-PAGE and subsequently Western blotting. Data was then subjected to statistical analysis to analyze possible correlation. RESULTS We have analyzed import of fluorescently labeled HSP90 inhibitor together with total and membrane level of HSP90 on a panel of selected breast carcinoma cell lines (BT-474, BT-549, BT-20, MCF-7, MDA-MB-468, SK-BR-3 a T-47D). Acquired data were subjected to statistical analysis that revealed a correlation between total and membrane level of HSP90 as well as correlation of ectopic HSP90 with uptake of HSP90 inhibitor. CONCLUSIONS Our analysis has shown that import of HSP90 inhibitors is likely dependent on membrane level of HSP90 as well as its total expression, and therefore can potentially reflect HSP90 addiction of cancer cells.Key words: breast neoplasms - HSP90 - heat shock proteins - geldanamycin This work was supported by MEYS - NPS I - LO1413. The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE recommendation for biomedical papers.Submitted: 13. 3. 2017Accepted: 26. 3. 2017.
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Minamisono K, Rossi DM, Beerwerth R, Fritzsche S, Garand D, Klose A, Liu Y, Maaß B, Mantica PF, Miller AJ, Müller P, Nazarewicz W, Nörtershäuser W, Olsen E, Pearson MR, Reinhard PG, Saperstein EE, Sumithrarachchi C, Tolokonnikov SV. Charge Radii of Neutron Deficient ^{52,53}Fe Produced by Projectile Fragmentation. Phys Rev Lett 2016; 117:252501. [PMID: 28036225 DOI: 10.1103/physrevlett.117.252501] [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] [Received: 10/05/2016] [Indexed: 06/06/2023]
Abstract
Bunched-beam collinear laser spectroscopy is performed on neutron deficient ^{52,53}Fe prepared through in-flight separation followed by a gas stopping. This novel scheme is a major step to reach nuclides far from the stability line in laser spectroscopy. Differential mean-square charge radii δ⟨r^{2}⟩ of ^{52,53}Fe are determined relative to stable ^{56}Fe as δ⟨r^{2}⟩^{56,52}=-0.034(13) fm^{2} and δ⟨r^{2}⟩^{56,53}=-0.218(13) fm^{2}, respectively, from the isotope shift of atomic hyperfine structures. The multiconfiguration Dirac-Fock method is used to calculate atomic factors to deduce δ⟨r^{2}⟩. The values of δ⟨r^{2}⟩ exhibit a minimum at the N=28 neutron shell closure. The nuclear density functional theory with Fayans and Skyrme energy density functionals is used to interpret the data. The trend of δ⟨r^{2}⟩ along the Fe isotopic chain results from an interplay between single-particle shell structure, pairing, and polarization effects and provides important data for understanding the intricate trend in the δ⟨r^{2}⟩ of closed-shell Ca isotopes.
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Affiliation(s)
- K Minamisono
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - D M Rossi
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - R Beerwerth
- Helmholtz-Institut Jena, Jena 07743, Germany
- Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - S Fritzsche
- Helmholtz-Institut Jena, Jena 07743, Germany
- Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - D Garand
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Klose
- Department of Chemistry, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Y Liu
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - B Maaß
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - P F Mantica
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - A J Miller
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - P Müller
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - W Nazarewicz
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
| | - W Nörtershäuser
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - E Olsen
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - M R Pearson
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - P-G Reinhard
- Institut für Theoretische Physik, Universität Erlangen, D-91054 Erlangen, Germany
| | - E E Saperstein
- National Research Centre "Kurchatov Institute," 123182 Moscow, Russia
- National Research Nuclear University MEPhI, 115409 Moscow, Russia
| | - C Sumithrarachchi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - S V Tolokonnikov
- National Research Centre "Kurchatov Institute," 123182 Moscow, Russia
- Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
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Müller P, Bere J, Fekete E, Móczó J, Nagy B, Kállay M, Gyarmati B, Pukánszky B. Interactions, structure and properties in PLA/plasticized starch blends. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Baeumer C, Raab N, Menke T, Schmitz C, Rosezin R, Müller P, Andrä M, Feyer V, Bruchhaus R, Gunkel F, Schneider CM, Waser R, Dittmann R. Verification of redox-processes as switching and retention failure mechanisms in Nb:SrTiO3/metal devices. Nanoscale 2016; 8:13967-13975. [PMID: 27089047 DOI: 10.1039/c6nr00824k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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
Nanoscale redox reactions in transition metal oxides are believed to be the physical foundation of memristive devices, which present a highly scalable, low-power alternative for future non-volatile memory devices. The interface between noble metal top electrodes and Nb-doped SrTiO3 single crystals may serve as a prominent but not yet well-understood example of such memristive devices. In this report, we will present experimental evidence that nanoscale redox reactions and the associated valence change mechanism are indeed responsible for the resistance change in noble metal/Nb-doped SrTiO3 junctions with dimensions ranging from the micrometer scale down to the nanometer regime. Direct verification of the valence change mechanism is given by spectromicroscopic characterization of switching filaments. Furthermore, it is found that the resistance change over time is driven by the reoxidation of a previously oxygen-deficient region. The retention times of the low resistance states, accordingly, can be dramatically improved under vacuum conditions as well as through the insertion of a thin Al2O3 layer which prevents this reoxidation. These insights finally confirm the resistive switching mechanism at these interfaces and are therefore of significant importance for the study and application of memristive devices based on Nb-doped SrTiO3 as well as systems with similar switching mechanisms.
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Affiliation(s)
- C Baeumer
- Peter Gruenberg Institute, Forschungszentrum Juelich GmbH and JARA-FIT, 52425 Juelich, Germany.
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Affiliation(s)
- M Windpessl
- From the Fourth Department of Medicine, Klinikum Wels-Grieskirchen, Grieskirchnerstrasse 42, 4600 Wels, Austria and
| | - P Müller
- Department of Neurology, Landesnervenklinik Linz, Wagner-Jauregg-Weg 15, 4020 Linz, Austria
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