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Santiago JL, Rivas E, Sanchez B, Buccolieri R, Vivanco MG, Martilli A, Martín F. Impact of single and combined local air pollution mitigation measures in an urban environment. Sci Total Environ 2024; 924:171441. [PMID: 38447731 DOI: 10.1016/j.scitotenv.2024.171441] [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] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 02/22/2024] [Accepted: 03/01/2024] [Indexed: 03/08/2024]
Abstract
Urban air pollution is one of the most important environmental problems for human health and several strategies have been developed for its mitigation. The objective of this study is to assess the impact of single and combined mitigation measures on concentrations of air pollutants emitted by traffic at pedestrian level in the same urban environment. The effectiveness of different scenarios of green infrastructure (GI), the implementation of photocatalytic materials and traffic low emission zones (LEZ) are investigated, as well as several combinations of LEZ and GI. A wide set of scenarios is simulated through Computational Fluid Dynamics (CFD) modelling for two different wind directions (perpendicular (0°) and 45° wind directions). Wind flow for the BASE scenario without any measure implemented was previously evaluated using wind-tunnel measurements. Air pollutant concentrations for this scenario are compared with the results obtained from the different mitigation scenarios. Reduction of traffic emissions through LEZ is found to be the most effective single measure to improve local air quality. However, GI enhances the effects of LEZ, which makes the combination of LEZ + GI a very effective measure. The effectiveness of this combination depends on the GI layout, the intensity of emission reduction in the LEZ and the traffic diversion in streets surrounding the LEZ. These findings, in line with previous literature, suggest that the implementation of GI may increase air pollutant concentrations at pedestrian level for some cases. However, this study highlights that this negative effect on air quality can turn into positive when used in combination with reductions of local traffic emissions.
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Affiliation(s)
- J L Santiago
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain.
| | - E Rivas
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain; Vicerrectorado de Investigación, Innovación y Doctorado, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - B Sanchez
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
| | - R Buccolieri
- Department of Environmental and Biological Sciences and technologies, Laboratory of Micrometeorology, University of Salento, S.P. 6 Lecce-Monteroni, 73100 Lecce, Italy; Institute of Atmospheric Sciences and Climate (ISAC), National Research Council (CNR), S.P. Lecce-Monteroni km 1,2, 73100 Lecce, Italy
| | - M G Vivanco
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
| | - A Martilli
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
| | - F Martín
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
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2
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Martín F, Janssen S, Rodrigues V, Sousa J, Santiago JL, Rivas E, Stocker J, Jackson R, Russo F, Villani MG, Tinarelli G, Barbero D, José RS, Pérez-Camanyo JL, Santos GS, Bartzis J, Sakellaris I, Horváth Z, Környei L, Liszkai B, Kovács Á, Jurado X, Reiminger N, Thunis P, Cuvelier C. Using dispersion models at microscale to assess long-term air pollution in urban hot spots: A FAIRMODE joint intercomparison exercise for a case study in Antwerp. Sci Total Environ 2024; 925:171761. [PMID: 38494008 DOI: 10.1016/j.scitotenv.2024.171761] [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] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/08/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
In the framework of the Forum for Air Quality Modelling in Europe (FAIRMODE), a modelling intercomparison exercise for computing NO2 long-term average concentrations in urban districts with a very high spatial resolution was carried out. This exercise was undertaken for a district of Antwerp (Belgium). Air quality data includes data recorded in air quality monitoring stations and 73 passive samplers deployed during one-month period in 2016. The modelling domain was 800 × 800 m2. Nine modelling teams participated in this exercise providing results from fifteen different modelling applications based on different kinds of model approaches (CFD - Computational Fluid Dynamics-, Lagrangian, Gaussian, and Artificial Intelligence). Some approaches consisted of models running the complete one-month period on an hourly basis, but most others used a scenario approach, which relies on simulations of scenarios representative of wind conditions combined with post-processing to retrieve a one-month average of NO2 concentrations. The objective of this study is to evaluate what type of modelling system is better suited to get a good estimate of long-term averages in complex urban districts. This is very important for air quality assessment under the European ambient air quality directives. The time evolution of NO2 hourly concentrations during a day of relative high pollution was rather well estimated by all models. Relative to high resolution spatial distribution of one-month NO2 averaged concentrations, Gaussian models were not able to give detailed information, unless they include building data and street-canyon parameterizations. The models that account for complex urban geometries (i.e. CFD, Lagrangian, and AI models) appear to provide better estimates of the spatial distribution of one-month NO2 averages concentrations in the urban canopy. Approaches based on steady CFD-RANS (Reynolds Averaged Navier Stokes) model simulations of meteorological scenarios seem to provide good results with similar quality to those obtained with an unsteady one-month period CFD-RANS simulations.
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Affiliation(s)
- F Martín
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain.
| | - S Janssen
- VITO NV, Flemish Institute for Research and Technology, Boeretang 200, 2400 Mol, Belgium
| | - V Rodrigues
- CESAM & Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
| | - J Sousa
- VITO NV, Flemish Institute for Research and Technology, Boeretang 200, 2400 Mol, Belgium
| | - J L Santiago
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain
| | - E Rivas
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain
| | - J Stocker
- Cambridge Environmental Research Consultants (CERC), UK
| | - R Jackson
- Cambridge Environmental Research Consultants (CERC), UK
| | - F Russo
- ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, 40129 Bologna, Italy
| | - M G Villani
- ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, 40129 Bologna, Italy
| | - G Tinarelli
- ARIANET S.r.l., via Crespi 57, 20159 Milano, Italy
| | - D Barbero
- ARIANET S.r.l., via Crespi 57, 20159 Milano, Italy
| | - R San José
- Computer Science School, Technical University of Madrid (UPM), Campus de Montegancedo, s/n, 28660 Madrid, Spain
| | - J L Pérez-Camanyo
- Computer Science School, Technical University of Madrid (UPM), Campus de Montegancedo, s/n, 28660 Madrid, Spain
| | - G Sousa Santos
- NILU - The Climate and Environmental Research Institute, Norway
| | - J Bartzis
- University of Western Macedonia (UOWM), Dept. of Mechanical Engineering, Sialvera & Bakola Str., 50132 Kozani, Greece
| | - I Sakellaris
- University of Western Macedonia (UOWM), Dept. of Mechanical Engineering, Sialvera & Bakola Str., 50132 Kozani, Greece
| | - Z Horváth
- SZE, Széchenyi István University, Győr, Hungary
| | - L Környei
- SZE, Széchenyi István University, Győr, Hungary
| | - B Liszkai
- SZE, Széchenyi István University, Győr, Hungary
| | - Á Kovács
- SZE, Széchenyi István University, Győr, Hungary
| | | | - N Reiminger
- AIR&D, Strasbourg, France; ICUBE Laboratory, UMR 7357, CNRS/University of Strasbourg, F-67000 Strasbourg, France
| | - P Thunis
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - C Cuvelier
- European Commission, Joint Research Centre (JRC), Ispra, Italy
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3
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Kuraoka T, Goto S, Kanno M, Díaz-Tendero S, Reino-González J, Trinter F, Pier A, Sommerlad L, Melzer N, McGinnis OD, Kruse J, Wenzel T, Jahnke T, Xue H, Kishimoto N, Yoshikawa K, Tamura Y, Ota F, Hatada K, Ueda K, Martín F. Tracing Photoinduced Hydrogen Migration in Alcohol Dications from Time-Resolved Molecular-Frame Photoelectron Angular Distributions. J Phys Chem A 2024; 128:1241-1249. [PMID: 38324399 PMCID: PMC10895665 DOI: 10.1021/acs.jpca.3c07640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 02/09/2024]
Abstract
The recent implementation of attosecond and few-femtosecond X-ray pump/X-ray probe schemes in large-scale free-electron laser facilities has opened the way to visualize fast nuclear dynamics in molecules with unprecedented temporal and spatial resolution. Here, we present the results of theoretical calculations showing how polarization-averaged molecular-frame photoelectron angular distributions (PA-MFPADs) can be used to visualize the dynamics of hydrogen migration in methanol, ethanol, propanol, and isopropyl alcohol dications generated by X-ray irradiation of the corresponding neutral species. We show that changes in the PA-MFPADs with the pump-probe delay as a result of intramolecular photoelectron diffraction carry information on the dynamics of hydrogen migration in real space. Although visualization of this dynamics is more straightforward in the smaller systems, methanol and ethanol, one can still recognize the signature of that motion in propanol and isopropyl alcohol and assign a tentative path to it. A possible pathway for a corresponding experiment requires an angularly resolved detection of photoelectrons in coincidence with molecular fragment ions used to define a molecular frame of reference. Such studies have become, in principle, possible since the first XFELs with sufficiently high repetition rates have emerged. To further support our findings, we provide experimental evidence of H migration in ethanol-OD from ion-ion coincidence measurements performed with synchrotron radiation.
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Affiliation(s)
- T. Kuraoka
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - S. Goto
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - M. Kanno
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - S. Díaz-Tendero
- Departamento
de Química, Universidad Autónoma
de Madrid, Madrid 28049, Spain
- Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, Madrid 28049, Spain
- Institute
for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - J. Reino-González
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain
| | - F. Trinter
- Molecular
Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, Berlin 14195, Germany
| | - A. Pier
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - L. Sommerlad
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - N. Melzer
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - O. D. McGinnis
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - J. Kruse
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - T. Wenzel
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - T. Jahnke
- Max-Planck-Institut
für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
- European
XFEL, Holzkoppel
4, Schenefeld 22869, Germany
| | - H. Xue
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - N. Kishimoto
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - K. Yoshikawa
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Y. Tamura
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - F. Ota
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - K. Hatada
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - K. Ueda
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - F. Martín
- Departamento
de Química, Universidad Autónoma
de Madrid, Madrid 28049, Spain
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain
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4
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Abstract
We have evaluated total and partial photoionization cross sections, β asymmetry parameters, and molecular frame photoelectron angular distributions (MFPADs) of the water molecule by using the XCHEM methodology. This method accounts for electron correlation in the electronic continuum, which is crucial to describe Feshbach resonances and their autoionization decay. We have identified a large number of Feshbach resonances, some of them previously unknown, in the region between 12.2 and 18.7 eV, for which we provide energy positions and widths. Many of these resonances lead to pronounced peaks in the photoionization spectra, some of them remarkably wide (up to 0.2 eV, for resonances converging to the third ionization threshold), which should be observable in high-energy resolution experiments. We show that, in the vicinity of these peaks, both asymmetry parameters and MFPADs vary very rapidly with photoelectron energy, which, as in atoms and simpler molecules, reflects the interference between direct ionization and autoionization, which is mostly driven by electron correlation.
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Affiliation(s)
- P Fernández-Milán
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - V J Borràs
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - J González-Vázquez
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - F Martín
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
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5
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Varvarezos L, Delgado-Guerrero J, Di Fraia M, Kelly TJ, Palacios A, Callegari C, Cavalieri AL, Coffee R, Danailov M, Decleva P, Demidovich A, DiMauro L, Düsterer S, Giannessi L, Helml W, Ilchen M, Kienberger R, Mazza T, Meyer M, Moshammer R, Pedersini C, Plekan O, Prince KC, Simoncig A, Schletter A, Ueda K, Wurzer M, Zangrando M, Martín F, Costello JT. Controlling Fragmentation of the Acetylene Cation in the Vacuum Ultraviolet via Transient Molecular Alignment. J Phys Chem Lett 2023; 14:24-31. [PMID: 36562987 PMCID: PMC9841558 DOI: 10.1021/acs.jpclett.2c03354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
An open-loop control scheme of molecular fragmentation based on transient molecular alignment combined with single-photon ionization induced by a short-wavelength free electron laser (FEL) is demonstrated for the acetylene cation. Photoelectron spectra are recorded, complementing the ion yield measurements, to demonstrate that such control is the consequence of changes in the electronic response with molecular orientation relative to the ionizing field. We show that stable C2H2+ cations are mainly produced when the molecules are parallel or nearly parallel to the FEL polarization, while the hydrogen fragmentation channel (C2H2+ → C2H+ + H) predominates when the molecule is perpendicular to that direction, thus allowing one to distinguish between the two photochemical processes. The experimental findings are supported by state-of-the art theoretical calculations.
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Affiliation(s)
- L. Varvarezos
- School
of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9, Ireland
| | - J. Delgado-Guerrero
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Advanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
| | - M. Di Fraia
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - T. J. Kelly
- Department
of Computer Science and Applied Physics, Atlantic Technological University, T91 T8NW Galway, Ireland
| | - A. Palacios
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Institute
for Advanced Research in Chimical Sciences, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - C. Callegari
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - A. L. Cavalieri
- Institute
of Applied Physics, University of Bern, 3012 Bern, Switzerland
- Paul
Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - R. Coffee
- Linac
Coherent Light Source/SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - M. Danailov
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - P. Decleva
- Istituto
Officina dei Materiali IOM-CNR and Dipartimento di Scienze Chimiche
e Farmaceutiche, Università degli
Studi di Trieste, 34121 Trieste, Italy
| | - A. Demidovich
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - L. DiMauro
- Department
of Physics, The Ohio State University, Columbus, Ohio 43210, United States
| | - S. Düsterer
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
| | - L. Giannessi
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - W. Helml
- Fakultät
Physik, Technische Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, 44227 Dortmund, Germany
| | - M. Ilchen
- Institut
fur Physik und CINSaT, Universitat Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - R. Kienberger
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - T. Mazza
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - M. Meyer
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - R. Moshammer
- Max-Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - C. Pedersini
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - O. Plekan
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - K. C. Prince
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
- Department
of Chemistry and Biotechnology, Swinburne
University of Technology, Melbourne, Victoria 3122, Australia
| | - A. Simoncig
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - A. Schletter
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - K. Ueda
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - M. Wurzer
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - M. Zangrando
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
- Istituto
Officina dei Materiali, Consiglio Nazionale
delle Ricerche, 34149 Trieste, Italy
| | - F. Martín
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Advanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
- Condensed
Matter Physics Center, Universidad Autónoma
de Madrid, 28049 Madrid, Spain
| | - J. T. Costello
- School
of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9, Ireland
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6
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Del Cueto M, Muzas AS, Martín F, Díaz C. Stereodynamics effects in grazing-incidence fast-molecule diffraction. Phys Chem Chem Phys 2022; 24:19541-19551. [PMID: 35938887 DOI: 10.1039/d2cp02109a] [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: 11/21/2022]
Abstract
Grazing-incidence fast-projectile diffraction has been proposed both as a complement and an alternative to thermal-energy projectile scattering, which explains the interest that this technique has received in recent years, especially in the case of atomic projectiles. On the other hand, despite the richer physics involved, molecular projectiles have received much less attention. In this work, we present a theoretical study of grazing-incidence fast-molecule diffraction of H2 from KCl(001) using a six-dimensional density functional theory based potential energy surface and a time-dependent wavepacket propagation method. The analysis of the computed diffraction patterns as a function of the molecular alignment, and their comparison with the available experimental data, where the initial distribution of rotational states in the molecule is not known, reveals a puzzling stereodynamics effect of the diffracted projectiles: diffracted molecules aligned perpendicular, or quasi perpendicular, to the surface reproduce rather well the experimental diffraction pattern, whereas those molecules aligned parallel to or tilted with respect to the surface do not behave as in the experiments. These results call for more detailed investigations of the molecular beam generation process.
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Affiliation(s)
- M Del Cueto
- Department of Chemistry, University of Liverpool, Liverpool, L69 3BK, UK
| | - A S Muzas
- Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU), 20018 Donotia-San Sebastián, Spain
| | - F Martín
- Departamento de Química Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzado en Nanociencia (IMDEA-Nanociencia), Cantoblanco 28049, Madrid, Spain
| | - C Díaz
- Departamento de Química Física, Facultad de CC. Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
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7
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Santiago JL, Rivas E, Gamarra AR, Vivanco MG, Buccolieri R, Martilli A, Lechón Y, Martín F. Estimates of population exposure to atmospheric pollution and health-related externalities in a real city: The impact of spatial resolution on the accuracy of results. Sci Total Environ 2022; 819:152062. [PMID: 34856257 DOI: 10.1016/j.scitotenv.2021.152062] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/25/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Health impacts of atmospheric pollution is an important issue in urban environments. Its magnitude depends on population exposure which have been frequently estimated by considering different approaches relating pollutant concentration and population exposed to it. However, the uncertainties due to the spatial resolution of the model used to estimate the pollutant concentration or due to the lack of representativeness of urban air quality monitoring station (AQMS) have not been evaluated in detail. In this context, NO2 annual average concentration at pedestrian level in the whole city of Pamplona (Spain) modelled at high spatial resolution (~1 m) by Computational Fluid Dynamic (CFD) simulations is used to estimate the total population exposure and health-related externalities by using different approaches. Air pollutant concentration and population are aggregated at different spatial resolutions ranging from a horizontal grid cell size of 100 m × 100 m to a coarser resolution where the whole city is covered by only one cell (6 km × 5 km). In addition, concentrations at AQMS locations are also extracted to assess the representativeness of those AQMS. The case with a spatial resolution of 100 m × 100 m for both pollutant-concentration distribution and population data is used as a reference (Base case) and compared with those obtained with the other approaches. This study indicates that the spatial resolution of concentration and population distribution in the city should be 1 km × 1 km or finer to obtain appropriate estimates of total population exposure (underestimations <13%) and health-related externalities (underestimations <37%). For the cases with coarser resolutions, a strong underestimation of total population exposure (>31%) and health-related externalities (>76%) was found. On the other hand, the use of AQMS concentrations can induce important errors due to the limited spatial representativeness, in particular in terms of population exposure.
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Affiliation(s)
- J L Santiago
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain.
| | - E Rivas
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
| | | | - M G Vivanco
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
| | - R Buccolieri
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, University of Salento, Lecce, Italy
| | - A Martilli
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
| | - Y Lechón
- Department of Energy, CIEMAT, Madrid, Spain
| | - F Martín
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
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8
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Ambrosio M, Plesiat E, Decleva P, Echenique P, Díez Muiño R, Martín F. Cluster approach to scattering in MoS2 photoemission. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111476] [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: 11/25/2022]
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Costa-Roig A, Martín F, Diéguez I, Escrig R, Fonseca R, Barrios JE, Pérez-Tarazona S, López J, Ibáñez I, Gutiérrez C, Vila JJ. Management of congenital and acquired airway pathologies in newborns by a cross-disciplinary committee at a third level hospital. Cir Pediatr 2021; 34:180-185. [PMID: 34606697] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
INTRODUCTION Neonatal airway examination through flexible/rigid bronchoscopy has proved to be useful in the presence of persistent stridor and extubation failure, as well as to assess complications following cardiac surgery. At our institution, these examinations are carried out by a pulmonologist, a neonatologist, an otorhinolaryngologist, and a pediatric surgeon from the pediatric airway committee, established in 2014. OBJECTIVE To analyze the airway examinations performed in neonates during their stay at the neonatology/neonatal intensive care unit since the airway committee was established. MATERIAL AND METHODS A retrospective study of the airway examinations conducted in neonates from 2015 to 2019 was carried out. Clinical and demographic data, number of examinations, indications, findings, and complications were collected. Results are presented as mean and standard deviation. Statistical significance was established at p < 0.05. RESULTS 92 airway examinations were analyzed in 51 patients (54.9% of whom were female). 51% of the patients were premature. Extubation failure and persistent respiratory symptoms following successful extubation were the most frequent indications for airway examination (35.3%). Stratification by gestational age or weight at birth was not associated with an increased risk of pathological findings at examination (p > 0.05). The most frequent finding was vocal cord paralysis (n = 14; 27.5%). In 10 patients (19.6%), no pathological findings were observed. CONCLUSION Airway examination is useful in patients with stridor to identify vocal cord paralysis following extubation failure. It also allows congenital airway pathologies to be diagnosed and treated. The number of examinations with no pathological findings was similar to that reported in international series.
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Affiliation(s)
- A Costa-Roig
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - F Martín
- Neonatology Department and Pediatric Neonatal Intensive Care Unit. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - I Diéguez
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - R Escrig
- Neonatology Department and Pediatric Neonatal Intensive Care Unit. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - R Fonseca
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - J E Barrios
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - S Pérez-Tarazona
- Pediatric Pulmonology Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - J López
- Pediatric Pulmonology Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - I Ibáñez
- Pediatric Otorhinolaryngology Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - C Gutiérrez
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - J J Vila
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
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Pereyra CJ, Campo L, Navarrete-Astorga E, Cuevas A, Romero R, Ariosa D, Henríquez R, Muñoz E, Martín F, Ramos-Barrado JR, Dalchiele EA, Marotti RE. Scattering of light by ZnO nanorod arrays. Opt Lett 2021; 46:2360-2363. [PMID: 33988583 DOI: 10.1364/ol.422706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
The optical properties of ZnO nanorod (NR) arrays were investigated by optical total transmittance (TT) and diffuse reflectance (DR) spectroscopy in the visible region. The NRs were grown electrochemically in a three-electrode cell over a glass/fluorine-doped tin oxide (FTO) substrate. The mean length, radius, and density of NR samples were characterized by scanning electron microscopy. The results were correlated with the observed optical properties. Since light scattering for these NR arrays is highly dependent on their morphology, therefore, a model for light scattering based in the Mie theory for cylinders was implemented to understand the observed spectra. The mean scattering and extinction cross sections were calculated from the morphology of the samples. They were used to fit the DR spectra. From the fittings, the TT spectra of the samples could be calculated. A good agreement with the experimental results was obtained. This indicates that the implemented model represents well the observed scattering phenomena.
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11
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Fallaque JG, Ramos M, Busnengo HF, Martín F, Díaz C. Normal and off-normal incidence dissociative dynamics of O 2(v,J) on ultrathin Cu films grown on Ru(0001). Phys Chem Chem Phys 2021; 23:7768-7776. [PMID: 33000830 DOI: 10.1039/d0cp03979a] [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: 11/21/2022]
Abstract
The dissociative adsorption of molecular oxygen on metal surfaces has long been controversial, mostly due to the spin-triplet nature of its ground state, to possible non-adiabatic effects, such as an abrupt charge transfer from the metal to the molecule, or even to the role played by the surface electronic state. Here, we have studied the dissociative adsorption of O2 on CuML/Ru(0001) at normal and off-normal incidence, from thermal to super-thermal energies, using quasi-classical dynamics, in the framework of the generalized Langevin oscillator model, and density functional theory based on a multidimensional potential energy surface. Our simulations reveal a rather intriguing behavior of dissociative adsorption probabilities, which exhibit normal energy scaling at incidence energies below the reaction barriers and total energy scaling above, irrespective of the reaction channel, either direct dissociation, trapping dissociation, or molecular adsorption. We directly compare our results with existing scanning tunneling spectroscopy and microscopy measurements. From this comparison, we infer that the observed experimental behavior at thermal energies may be due to ligand and strain effects, as already found for super-thermal incidence energies.
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Affiliation(s)
- J G Fallaque
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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12
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Santiago JL, Borge R, Sanchez B, Quaassdorff C, de la Paz D, Martilli A, Rivas E, Martín F. Estimates of pedestrian exposure to atmospheric pollution using high-resolution modelling in a real traffic hot-spot. Sci Total Environ 2021; 755:142475. [PMID: 33039894 DOI: 10.1016/j.scitotenv.2020.142475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/19/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
Atmospheric pollution is a very relevant risk for the human health, in particular in urban environments, where most people lives and high levels of pollution are found. Population exposure is traditionally estimated through concentration recorded at air quality monitoring stations (AQMS) or modelled at a spatial resolution of the order of 1 km2. However, these methodologies have limitations in urban areas where strong gradients of concentration, even in the same street, exist. In addition, the movements of pedestrians make difficult to compute reliable estimates of pollutant concentration to which people are exposed to. In this context, the main objective of this study is to estimate the exposure of pedestrians to ambient nitrogen oxides (NOx) concentrations with high spatial resolution in a real urban traffic hot-spot under different methodologies. To achieve this objective, a novel methodology which combines high-resolution NOx concentrations from computational fluid dynamic (CFD) simulations with the pedestrian flows obtained by pedestrian mobility microsimulations is applied to an urban area of Madrid, Spain. High-resolution maps show pedestrian exposure peaks, at bus stops and crosswalks, that cannot be captured by the simpler methods based on spatial average concentration (SAC) or concentration measured in an AQMS. Total daily exposure obtained is 1.19 · 109 person s μg m-3, while SAC and AQMS concentration methods yielded 9-23% and 30-40% lower values. In conclusion, the proposed methodology allows to determine the areas with higher exposure in order to design local strategies to reduce the impact on human health. In addition, from a more general point of view, the total exposure in the studied area is better estimated by using spatial average concentration than through concentration recorded by AQMS. The assessment of the spatial representative of AQMS becomes necessary to use AQMS concentration to evaluate air quality and population exposure of an urban area.
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Affiliation(s)
- J L Santiago
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain.
| | - R Borge
- Laboratory of Environmental Modelling, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - B Sanchez
- Department of Geography, National University of Singapore, Singapore; Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
| | - C Quaassdorff
- Laboratory of Environmental Modelling, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - D de la Paz
- Laboratory of Environmental Modelling, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - A Martilli
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
| | - E Rivas
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
| | - F Martín
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
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13
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Nandi S, Plésiat E, Zhong S, Palacios A, Busto D, Isinger M, Neoričić L, Arnold CL, Squibb RJ, Feifel R, Decleva P, L’Huillier A, Martín F, Gisselbrecht M. Attosecond timing of electron emission from a molecular shape resonance. Sci Adv 2020; 6:eaba7762. [PMID: 32789174 PMCID: PMC7399650 DOI: 10.1126/sciadv.aba7762] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
Shape resonances in physics and chemistry arise from the spatial confinement of a particle by a potential barrier. In molecular photoionization, these barriers prevent the electron from escaping instantaneously, so that nuclei may move and modify the potential, thereby affecting the ionization process. By using an attosecond two-color interferometric approach in combination with high spectral resolution, we have captured the changes induced by the nuclear motion on the centrifugal barrier that sustains the well-known shape resonance in valence-ionized N2. We show that despite the nuclear motion altering the bond length by only 2%, which leads to tiny changes in the potential barrier, the corresponding change in the ionization time can be as large as 200 attoseconds. This result poses limits to the concept of instantaneous electronic transitions in molecules, which is at the basis of the Franck-Condon principle of molecular spectroscopy.
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Affiliation(s)
- S. Nandi
- Department of Physics, Lund University, 22100 Lund, Sweden
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - E. Plésiat
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S. Zhong
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - A. Palacios
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute of Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - D. Busto
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - M. Isinger
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - L. Neoričić
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - C. L. Arnold
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - R. J. Squibb
- Department of Physics, University of Gothenburg, 41296 Göteborg, Sweden
| | - R. Feifel
- Department of Physics, University of Gothenburg, 41296 Göteborg, Sweden
| | - P. Decleva
- Dipartimento di Scienze Chimiche e Farmaceutiche, Universitá di Trieste and IOM-CNR, 34127 Trieste, Italy
| | - A. L’Huillier
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - F. Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
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14
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Solís-Cortés D, Navarrete-Astorga E, Schrebler R, Peinado-Pérez JJ, Martín F, Ramos-Barrado JR, Dalchiele EA. A solid-state integrated photo-supercapacitor based on ZnO nanorod arrays decorated with Ag 2S quantum dots as the photoanode and a PEDOT charge storage counter-electrode. RSC Adv 2020; 10:5712-5721. [PMID: 35497434 PMCID: PMC9049565 DOI: 10.1039/c9ra10635a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 01/08/2020] [Indexed: 11/21/2022] Open
Abstract
A planar solid-state photocapacitor with two electrodes has been prepared for the first time using a passivated film of ZnS with Ag2S quantum dots deposited on ZnO nanorods, which were electrochemically grown on ZnO seed layers, as the photoanode. The supercapacitor part is composed of a electrodeposited poly(3,4-ethylene-dioxythiophene) PEDOT film as the counter-electrode and an ionic liquid-based electrolyte between them deposited by the dip coating method. The different nanostructures and electrodes were morphologically and structurally characterized, and the device was electrochemically characterized and could reach a potential of 0.33 V during photocharge and a storage efficiency of 6.83%.
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Affiliation(s)
- D Solís-Cortés
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - E Navarrete-Astorga
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - R Schrebler
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059 Valparaíso Chile
| | - J J Peinado-Pérez
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - F Martín
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - J R Ramos-Barrado
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - E A Dalchiele
- Instituto de Física, Facultad de Ingeniería Herrera y Reissig 565, C.C. 30 11000 Montevideo Uruguay
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15
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Kling NG, Díaz-Tendero S, Obaid R, Disla MR, Xiong H, Sundberg M, Khosravi SD, Davino M, Drach P, Carroll AM, Osipov T, Martín F, Berrah N. Time-resolved molecular dynamics of single and double hydrogen migration in ethanol. Nat Commun 2019; 10:2813. [PMID: 31249306 PMCID: PMC6597707 DOI: 10.1038/s41467-019-10571-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 04/30/2019] [Indexed: 11/17/2022] Open
Abstract
Being the lightest, most mobile atom that exists, hydrogen plays an important role in the chemistry of hydrocarbons, proteins and peptides and most biomolecules. Hydrogen can undergo transfer, exchange and migration processes, having considerable impact on the chemical behavior of these molecules. Although much has been learned about reaction dynamics involving one hydrogen atom, less is known about those processes where two or more hydrogen atoms participate. Here we show that single and double hydrogen migrations occurring in ethanol cations and dications take place within a few hundred fs to ps, using a 3D imaging and laser pump-probe technique. For double hydrogen migration, the hydrogens are not correlated, with the second hydrogen migration promoting the breakup of the C-O bond. The probability of double hydrogen migration is quite significant, suggesting that double hydrogen migration plays a more important role than generally assumed. The conclusions are supported by state-of-the-art molecular dynamics calculations.
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Affiliation(s)
- Nora G Kling
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA.
| | - S Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
| | - R Obaid
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - M R Disla
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - H Xiong
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - M Sundberg
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - S D Khosravi
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - M Davino
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - P Drach
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - A M Carroll
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - T Osipov
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - F Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049, Madrid, Spain.
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018, Donostia-San Sebastián, Spain.
| | - N Berrah
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA.
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16
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Trabattoni A, Galli M, Lara-Astiaso M, Palacios A, Greenwood J, Tavernelli I, Decleva P, Nisoli M, Martín F, Calegari F. Charge migration in photo-ionized aromatic amino acids. Philos Trans A Math Phys Eng Sci 2019; 377:20170472. [PMID: 30929627 PMCID: PMC6452047 DOI: 10.1098/rsta.2017.0472] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Attosecond pump-probe spectroscopy is a unique tool for the direct observation of the light-activated electronic motion in molecules and it offers the possibility to capture the first instants of a chemical reaction. Recently, advances in attosecond technology allowed the charge migration processes to be revealed in biochemically relevant molecules. Although this purely electronic process might be key for a future chemistry at the electron time scale, the influence of this ultrafast charge flow on the reactivity of a molecule is still debated. In this work, we exploit extreme ultraviolet attosecond pulses to activate charge migration in two aromatic amino acids, namely phenylalanine and tryptophan. Advanced numerical calculations are performed to interpret the experimental data and to discuss the effects of the nuclear dynamics on the activated quantum coherences. By comparing the experimental results obtained in the two molecules, we show that the presence of different functional groups strongly affects the fragmentation pathways, as well as the charge rearrangement. The observed charge dynamics indeed present peculiar aspects, including characteristic periodicities and decoherence times. Numerical results indicate that, even for a very large molecule such as tryptophan, the quantum coherences can survive the nuclear dynamics for several femtoseconds. These results open new and important perspectives for a deeper understanding of the photo-induced charge dynamics, as a promising tool to control the reactivity of bio-relevant molecules via photo-excitation. This article is part of the theme issue 'Measurement of ultrafast electronic and structural dynamics with X-rays'.
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Affiliation(s)
- A. Trabattoni
- Center for Free-Electron Laser Science (CFEL), DESY, 22607 Hamburg, Germany
- e-mail:
| | - M. Galli
- Institute for Photonics and Nanotechnologies, IFN-CNR, 20133 Milano, Italy
- Dipartimento di Fisica, Politecnico di Milano, 20133 Milano, Italy
| | - M. Lara-Astiaso
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - A. Palacios
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - J. Greenwood
- School of Maths and Physics, Queen's University, Belfast BT7 1NN, UK
| | - I. Tavernelli
- IBM Research GmbH, Zurich Research Laboratory, 8803 Rueschlikon, Switzerland
| | - P. Decleva
- Dipartimento di Scienze Chimiche e Farmaceutiche, Universitá di Trieste, 34127 Trieste, Italy
| | - M. Nisoli
- Institute for Photonics and Nanotechnologies, IFN-CNR, 20133 Milano, Italy
- Dipartimento di Fisica, Politecnico di Milano, 20133 Milano, Italy
| | - F. Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia, 28049 Madrid, Spain
| | - F. Calegari
- Center for Free-Electron Laser Science (CFEL), DESY, 22607 Hamburg, Germany
- Institute for Photonics and Nanotechnologies, IFN-CNR, 20133 Milano, Italy
- Department of Physics, Hamburg Universität, 20355 Hamburg, Germany
- e-mail:
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17
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Oberli S, González-Vázquez J, Rodríguez-Perelló E, Sodupe M, Martín F, Picón A. Site-selective-induced isomerization of formamide. Phys Chem Chem Phys 2019; 21:25626-25634. [DOI: 10.1039/c9cp04441h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We theoretically demonstrate the possibility to site-selectively induce and track isomerization in formamide by using a femtosecond X-ray-pump/X-ray-probe scheme.
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Affiliation(s)
- S. Oberli
- Departamento de Química
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | | | | | - M. Sodupe
- Departament de Química
- Universitat Autònoma de Barcelona
- 08193 Bellaterra
- Spain
| | - F. Martín
- Departamento de Química
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia)
| | - A. Picón
- Departamento de Química
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
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18
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Gómez E, Martín F, Nogacka AM, Salazar N, Aláez L, Alcorta E, Gueimonde M, De Los Reyes-Gavilán CG. Impact of probiotics on development and behaviour in Drosophila melanogaster - a potential in vivo model to assess probiotics. Benef Microbes 2018; 10:179-188. [PMID: 30574803 DOI: 10.3920/bm2018.0012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In vitro models are frequently used in probiotic research. However, such models often fail to predict in vivo functionality and efficacy. This fact complicates the screening process for selecting the most suitable strains, prior to accomplish expensive animal studies and clinical intervention trials. Therefore, additional sensitive, discriminating and cost-effective models are needed to conduct preliminary assays before undertaking human intervention studies definitely proving efficacy. With this purpose in mind, we explored the potential of axenic Drosophila melanogaster populations as well as of these axenic flies treated with probiotic microbial strains as a model to test the effects of probiotics on a subset of developmental and behavioural traits. An axenic D. melanogaster progeny from the wild-type Canton S strain was obtained and its eggs were further developed until pupae eclosion occurred in growth medium containing either of two probiotic strains: Bifidobacterium animalis subsp. lactis Bb12 or Lactobacillus rhamnosus GG. Whereas B. animalis Bb12 colonised the flies, the capacity of L. rhamnosus LGG to colonise was considerably lower in our experimental conditions. Regarding the influence of microbial load on the flies' development, the axenic condition caused a decrease in egg survival, and lowered adults' average weight with respect to wild-type flies. Both probiotics were able to counteract these effects. An earlier emergence of adults was observed from eggs treated with L. rhamnosus GG in comparison to the other fly populations. The axenic condition did not influence negative geotaxis behaviour in Drosophila; however, flies mono-associated with B. animalis Bb12 moved faster than wild-type. Our results suggest that the use of axenic/probiotic-treated D. melanogaster populations may be an affordable model for preliminary testing of the effects of probiotics on developmental or behavioural aspects.
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Affiliation(s)
- E Gómez
- 1 Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Asturias, Spain.,2 Department of Functional Biology, Genetics Area, Faculty of Medicine, University of Oviedo, Julian Claveria 6, 33006 Oviedo, Asturias, Spain
| | - F Martín
- 2 Department of Functional Biology, Genetics Area, Faculty of Medicine, University of Oviedo, Julian Claveria 6, 33006 Oviedo, Asturias, Spain
| | - A M Nogacka
- 1 Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Asturias, Spain.,3 Diet, Microbiota and Health Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avda. Roma s/n, 33011 Oviedo, Asturias, Spain
| | - N Salazar
- 1 Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Asturias, Spain.,3 Diet, Microbiota and Health Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avda. Roma s/n, 33011 Oviedo, Asturias, Spain
| | - L Aláez
- 1 Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Asturias, Spain
| | - E Alcorta
- 2 Department of Functional Biology, Genetics Area, Faculty of Medicine, University of Oviedo, Julian Claveria 6, 33006 Oviedo, Asturias, Spain
| | - M Gueimonde
- 1 Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Asturias, Spain.,3 Diet, Microbiota and Health Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avda. Roma s/n, 33011 Oviedo, Asturias, Spain
| | - C G De Los Reyes-Gavilán
- 1 Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares s/n, 33300 Villaviciosa, Asturias, Spain.,3 Diet, Microbiota and Health Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avda. Roma s/n, 33011 Oviedo, Asturias, Spain
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19
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Navarro JJ, Pisarra M, Nieto-Ortega B, Villalva J, Ayani CG, Díaz C, Calleja F, Miranda R, Martín F, Pérez EM, Vázquez de Parga AL. Graphene catalyzes the reversible formation of a C-C bond between two molecules. Sci Adv 2018; 4:eaau9366. [PMID: 30555920 PMCID: PMC6294602 DOI: 10.1126/sciadv.aau9366] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/14/2018] [Indexed: 06/09/2023]
Abstract
Carbon deposits are well-known inhibitors of transition metal catalysts. In contrast to this undesirable behavior, here we show that epitaxial graphene grown on Ru(0001) promotes the reversible formation of a C-C bond between -CH2CN and 7,7,8,8-tetracyano-p-quinodimethane (TCNQ). The catalytic role of graphene is multifaceted: First, it allows for an efficient charge transfer between the surface and the reactants, thus favoring changes in carbon hybridization; second, it holds the reactants in place and makes them reactive. The reaction is fully reversible by injecting electrons with an STM tip on the empty molecular orbitals of the product. The making and breaking of the C-C bond is accompanied by the switching off and on of a Kondo resonance, so that the system can be viewed as a reversible magnetic switch controlled by a chemical reaction.
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Affiliation(s)
- J. J. Navarro
- Dep. Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
| | - M. Pisarra
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
- Dep. Química Módulo 13, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - B. Nieto-Ortega
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
| | - J. Villalva
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
| | - C. G. Ayani
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
| | - C. Díaz
- Dep. Química Módulo 13, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Cantoblanco, 28049 Madrid, Spain
| | - F. Calleja
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
| | - R. Miranda
- Dep. Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Cantoblanco, 28049 Madrid, Spain
| | - F. Martín
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
- Dep. Química Módulo 13, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Cantoblanco, 28049 Madrid, Spain
| | - E. M. Pérez
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
| | - A. L. Vázquez de Parga
- Dep. Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Cantoblanco, 28049 Madrid, Spain
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20
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Holzmeier F, Bello RY, Hervé M, Achner A, Baumann TM, Meyer M, Finetti P, Di Fraia M, Gauthier D, Roussel E, Plekan O, Richter R, Prince KC, Callegari C, Bachau H, Palacios A, Martín F, Dowek D. Control of H_{2} Dissociative Ionization in the Nonlinear Regime Using Vacuum Ultraviolet Free-Electron Laser Pulses. Phys Rev Lett 2018; 121:103002. [PMID: 30240272 DOI: 10.1103/physrevlett.121.103002] [Citation(s) in RCA: 3] [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: 04/03/2018] [Indexed: 06/08/2023]
Abstract
The role of the nuclear degrees of freedom in nonlinear two-photon single ionization of H_{2} molecules interacting with short and intense vacuum ultraviolet pulses is investigated, both experimentally and theoretically, by selecting single resonant vibronic intermediate neutral states. This high selectivity relies on the narrow bandwidth and tunability of the pulses generated at the FERMI free-electron laser. A sustained enhancement of dissociative ionization, which even exceeds nondissociative ionization, is observed and controlled as one selects progressively higher vibronic states. With the help of ab initio calculations for increasing pulse durations, the photoelectron and ion energy spectra obtained with velocity map imaging allow us to identify new photoionization pathways. With pulses of the order of 100 fs, the experiment probes a timescale that lies between that of ultrafast dynamical processes and that of steady state excitations.
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Affiliation(s)
- F Holzmeier
- Institut des Sciences Moléculaires d'Orsay CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - R Y Bello
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - M Hervé
- Institut des Sciences Moléculaires d'Orsay CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France
| | - A Achner
- European XFEL GmbH, 22869 Schenefeld, Germany
| | - T M Baumann
- European XFEL GmbH, 22869 Schenefeld, Germany
| | - M Meyer
- European XFEL GmbH, 22869 Schenefeld, Germany
| | - P Finetti
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - M Di Fraia
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - D Gauthier
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - E Roussel
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - O Plekan
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - R Richter
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - K C Prince
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - C Callegari
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy
| | - H Bachau
- Centre des Lasers Intenses et Applications (UMR 5107 du CNRS-CEA-Université de Bordeaux), 351 Cours de la Libération, 33405 Talence cedex, France
| | - A Palacios
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - F Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - D Dowek
- Institut des Sciences Moléculaires d'Orsay CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France
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21
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Abstract
Summary
Objective: To analyze the scientific and engineering components of Medical Informatics. A clear characterization of these components should be undertaken to categorize different areas of Medical Informatics and create a research agenda for the future. Methods: We have adapted a classical ACM and IEEE report on computing to analyze Medical Informatics from three different viewpoints: Theory, Abstraction, and Design.
Results: We suggest that Medical Informatics can be considered from these three perspectives: (1) Theory, from which medical informaticians formally characterize the properties of the objects of study, creating new theories or using and adapting existing theories (e.g., from mathematics), (2) Abstraction, from which medical informaticians deal with all aspects of medical information and create new abstractions, methods, and technology-independent models, which can be experimentally verified, and (3) Design, from which medical informaticians develop systems or act as information brokers or advisors between medical and technology professionals, to improve the quality of computer applications in medicine.
Conclusion: Based on this framework, we suggest that Medical Informatics has an independent scientific character, different from other applied informatics areas. Finally, we analyze these three perspectives using data mining in medicine.
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22
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Nava-Castañeda Á, Martín F, Voorduin S, Zuazo F. Tuberculosis, granulomatosis with polyangiitis, or both? A case report. Arch Soc Esp Oftalmol (Engl Ed) 2018; 93:101-104. [PMID: 28756866 DOI: 10.1016/j.oftal.2017.06.013] [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: 05/16/2017] [Revised: 06/20/2017] [Accepted: 06/25/2017] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Tuberculosis (TB) is a chronic granulomatose infection, and granulomatosis with polyangiitis (GP) is a small vessel vasculitis, both of which affect the lungs. The combination of these diseases is rare. Both have similar clinical features, making the differential diagnosis difficult. CASE REPORT It concerns a 37 year-old female undergoing treatment for pulmonary TB, who presented with left ocular proptosis, eyelid and conjunctival edema and erythema. Orbital biopsy revealed GP. C-Anti-neutrophil cytoplasmic antibodies were elevated. The patient responded well to immunosuppressive treatment. CONCLUSION TB and GP can associate. Diagnosis should include not only C-anti-neutrophil cytoplasmic antibodies, but also a biopsy, in order to select the appropriate treatment.
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Affiliation(s)
- Á Nava-Castañeda
- Instituto de Oftalmología Fundación de Asistencia Privada Conde de Valenciana IAP, Ciudad de México, México.
| | - F Martín
- Instituto de Oftalmología Fundación de Asistencia Privada Conde de Valenciana IAP, Ciudad de México, México
| | - S Voorduin
- Instituto de Oftalmología Fundación de Asistencia Privada Conde de Valenciana IAP, Ciudad de México, México
| | - F Zuazo
- Instituto de Oftalmología Fundación de Asistencia Privada Conde de Valenciana IAP, Ciudad de México, México
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23
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Navarrete-Astorga E, Solís-Cortés D, Rodríguez-Moreno J, Dalchiele EA, Schrebler R, Martín F, Ramos-Barrado JR. A new concept of a transparent photocapacitor. Chem Commun (Camb) 2018; 54:10762-10765. [DOI: 10.1039/c8cc06112b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This work presents a new concept of a transparent solid-state photocapacitor which exhibits high transmittance compared to other reported results, and an acceptable specific capacitance.
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Affiliation(s)
- E. Navarrete-Astorga
- Universidad de Málaga
- Departamentos de Física Aplicada I & Ingeniería Química
- Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC)
- E29071 Málaga
- Spain
| | - D. Solís-Cortés
- Universidad de Málaga
- Departamentos de Física Aplicada I & Ingeniería Química
- Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC)
- E29071 Málaga
- Spain
| | - J. Rodríguez-Moreno
- Universidad de Málaga
- Departamentos de Física Aplicada I & Ingeniería Química
- Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC)
- E29071 Málaga
- Spain
| | - E. A. Dalchiele
- Instituto de Física
- Facultad de Ingeniería
- 11000 Montevideo
- Uruguay
| | - R. Schrebler
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Casilla 4059
- Chile
| | - F. Martín
- Universidad de Málaga
- Departamentos de Física Aplicada I & Ingeniería Química
- Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC)
- E29071 Málaga
- Spain
| | - J. R. Ramos-Barrado
- Universidad de Málaga
- Departamentos de Física Aplicada I & Ingeniería Química
- Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC)
- E29071 Málaga
- Spain
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24
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Waitz M, Bello RY, Metz D, Lower J, Trinter F, Schober C, Keiling M, Lenz U, Pitzer M, Mertens K, Martins M, Viefhaus J, Klumpp S, Weber T, Schmidt LPH, Williams JB, Schöffler MS, Serov VV, Kheifets AS, Argenti L, Palacios A, Martín F, Jahnke T, Dörner R. Imaging the square of the correlated two-electron wave function of a hydrogen molecule. Nat Commun 2017; 8:2266. [PMID: 29273745 PMCID: PMC5741688 DOI: 10.1038/s41467-017-02437-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 07/17/2017] [Accepted: 11/30/2017] [Indexed: 11/23/2022] Open
Abstract
The toolbox for imaging molecules is well-equipped today. Some techniques visualize the geometrical structure, others the electron density or electron orbitals. Molecules are many-body systems for which the correlation between the constituents is decisive and the spatial and the momentum distribution of one electron depends on those of the other electrons and the nuclei. Such correlations have escaped direct observation by imaging techniques so far. Here, we implement an imaging scheme which visualizes correlations between electrons by coincident detection of the reaction fragments after high energy photofragmentation. With this technique, we examine the H2 two-electron wave function in which electron–electron correlation beyond the mean-field level is prominent. We visualize the dependence of the wave function on the internuclear distance. High energy photoelectrons are shown to be a powerful tool for molecular imaging. Our study paves the way for future time resolved correlation imaging at FELs and laser based X-ray sources. Electron-electron correlation is a complex and interesting phenomenon that occurs in multi-electron systems. Here, the authors demonstrate the imaging of the correlated two-electron wave function in hydrogen molecule using the coincident detection of the electron and proton after the photoionization.
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Affiliation(s)
- M Waitz
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - R Y Bello
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - D Metz
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - J Lower
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - F Trinter
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - C Schober
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - M Keiling
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - U Lenz
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - M Pitzer
- Universität Kassel, Heinr.-Plett-Strasse 40, 34132, Kassel, Germany
| | - K Mertens
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - M Martins
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - J Viefhaus
- FS-PE, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607, Hamburg, Germany
| | - S Klumpp
- FS-FLASH-D, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607, Hamburg, Germany
| | - T Weber
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - L Ph H Schmidt
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - J B Williams
- Department of Physics, University of Nevada Reno, 1664 N. Virginia Street, Reno, NV, 89557, USA
| | - M S Schöffler
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - V V Serov
- Department of Theoretical Physics, Saratov State University, 83 Astrakhanskaya, Saratov, 410012, Russia
| | - A S Kheifets
- Research School of Physical Sciences, The Australian National University, Canberra, ACT, 0200, Australia
| | - L Argenti
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Department of Physics and CREOL College of Optics & Photonics, University of Central Florida, Orlando, FL 32816, USA
| | - A Palacios
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - F Martín
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain. .,Instituto Madrileo de Estudios Avanzados en Nanociencia, 28049, Madrid, Spain. .,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
| | - T Jahnke
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany
| | - R Dörner
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438, Frankfurt, Germany.
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25
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Marcos A, Medina J, Muratore G, Martín F, Reboso L, Foucher G. Acceso lateroungueal en los tumores glómicos periungueales. Revisión de 75 casos. Rev Iberoam Cir Mano 2017. [DOI: 10.1055/s-0037-1606716] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Introducción: Los tumores glómicos son tumores benignos, poco frecuentes, localizados preferentemente en la mano, que presentan una clínica muy característica y cuyo tratamiento es quirúrgico.
Material y métodos: Se han revisado retrospectivamente 75 tumores glómicos periungueales, diagnosticados clínicamente y confirmados por estudio anatomopatológico que fueron extirpados quirúrgicamente por vía lateroungueal.
Resultados: El empleo de la vía lateroungueal para la exéresis de los tumores glómicos periungueales fue efectiva en todos los casos, sin originar distrofias ungueales y con un porcentaje de recidivas bajo (11,9%).
Discusión: El diagnóstico de los tumores glómicos es fundamentalmente clínico, aunque se apoya en las pruebas de imagen (radiografía, ecografía y resonancia magnética). Su tratamiento es quirúrgico, existiendo múltiples vías de abordaje. Existe un riesgo de recidiva, que debe ser conocido por el paciente previamente a la cirugía.
Conclusiones: El acceso lateroungueal en los tumores glómicos es un método seguro, que permite su exéresis completa.
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Affiliation(s)
- A. Marcos
- Médico Adjunto. Unidad de Mano, Miembro Superior y Nervio Periférico. Hospital Universitario Insular de Gran Canaria
| | - J. Medina
- Médico Adjunto. Coordinador Unidad de Mano, Miembro Superior y Nervio Periférico. Hospital Universitario Insular de Gran Canaria
| | - G. Muratore
- Médico Adjunto. Unidad de Mano, Miembro Superior y Nervio Periférico. Hospital Universitario Insular de Gran Canaria
| | - F. Martín
- Médico Adjunto. Unidad de Mano, Miembro Superior y Nervio Periférico. Hospital Universitario Insular de Gran Canaria
| | - L. Reboso
- Médico Adjunto. Coordinador Unidad de Mano, Miembro Superior y Nervio Periférico. Hospital Universitario Nuestra Señora de la Candelaria. Tenerife
| | - G. Foucher
- Profesor Colaborador Universidad de Las Palmas de Gran Canaria
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Del Cueto M, Muzas AS, Somers MF, Kroes GJ, Díaz C, Martín F. Exploring surface landscapes with molecules: rotationally induced diffraction of H 2 on LiF(001) under fast grazing incidence conditions. Phys Chem Chem Phys 2017. [PMID: 28621794 DOI: 10.1039/c7cp02904g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomic diffraction by surfaces under fast grazing incidence conditions has been used for almost a decade to characterize surface properties with more accuracy than with more traditional atomic diffraction methods. From six-dimensional solutions of the time-dependent Schrödinger equation, we show that diffraction of H2 molecules under fast grazing incidence conditions could be even more informative for the characterization of ionic surfaces, due to the large anisotropic electrostatic interaction between the quadrupole moment of the molecule and the electric field created by the ionic crystal. Using the LiF(001) surface as a benchmark, we show that fast grazing incidence diffraction of H2 strongly depends on the initial rotational state of the molecule, while rotationally inelastic processes are irrelevant. We demonstrate that, as a result of the anisotropy of the impinging projectile, initial rotational excitation leads to an increase in intensity of high-order diffraction peaks at incidence directions that satisfy precise symmetry constraints, thus providing a more detailed information on the surface characteristics than that obtained from low-order atomic diffraction peaks under fast grazing incidence conditions. As quadrupole-ion surface potentials are expected to accurately represent the interaction between H2 and any surface with a marked ionic character, our analysis should be of general applicability to any of such surfaces. Finally, we show that a density functional theory description of the molecule-ion surface potential catches the main features observed experimentally.
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Affiliation(s)
- M Del Cueto
- Departamento de Química Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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27
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Gruson V, Barreau L, Jiménez-Galan Á, Risoud F, Caillat J, Maquet A, Carré B, Lepetit F, Hergott JF, Ruchon T, Argenti L, Taïeb R, Martín F, Salières P. Attosecond dynamics through a Fano resonance: Monitoring the birth of a photoelectron. Science 2017; 354:734-738. [PMID: 27846602 DOI: 10.1126/science.aah5188] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 10/05/2016] [Indexed: 11/02/2022]
Abstract
The dynamics of quantum systems are encoded in the amplitude and phase of wave packets. However, the rapidity of electron dynamics on the attosecond scale has precluded the complete characterization of electron wave packets in the time domain. Using spectrally resolved electron interferometry, we were able to measure the amplitude and phase of a photoelectron wave packet created through a Fano autoionizing resonance in helium. In our setup, replicas obtained by two-photon transitions interfere with reference wave packets that are formed through smooth continua, allowing the full temporal reconstruction, purely from experimental data, of the resonant wave packet released in the continuum. In turn, this resolves the buildup of the autoionizing resonance on an attosecond time scale. Our results, in excellent agreement with ab initio time-dependent calculations, raise prospects for detailed investigations of ultrafast photoemission dynamics governed by electron correlation, as well as coherent control over structured electron wave packets.
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Affiliation(s)
- V Gruson
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-Sur-Yvette, France
| | - L Barreau
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-Sur-Yvette, France
| | - Á Jiménez-Galan
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - F Risoud
- Sorbonne Université, UPMC Université Paris 6, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75231 Paris Cedex 05, France, and CNRS, UMR 7614, LCPMR, Paris, France
| | - J Caillat
- Sorbonne Université, UPMC Université Paris 6, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75231 Paris Cedex 05, France, and CNRS, UMR 7614, LCPMR, Paris, France
| | - A Maquet
- Sorbonne Université, UPMC Université Paris 6, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75231 Paris Cedex 05, France, and CNRS, UMR 7614, LCPMR, Paris, France
| | - B Carré
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-Sur-Yvette, France
| | - F Lepetit
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-Sur-Yvette, France
| | - J-F Hergott
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-Sur-Yvette, France
| | - T Ruchon
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-Sur-Yvette, France
| | - L Argenti
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - R Taïeb
- Sorbonne Université, UPMC Université Paris 6, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75231 Paris Cedex 05, France, and CNRS, UMR 7614, LCPMR, Paris, France
| | - F Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Salières
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-Sur-Yvette, France.
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Hernández L, Riveros G, Martín F, González D, Lopez M, León M. Enhanced morphology, crystallinity and conductivity of poly (3,4-ethyldioxythiophene)/ErGO composite films by in situ reduction of TrGO partially reduced on PEDOT modified electrode. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.076] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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29
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Ramos M, Díaz C, Martínez AE, Busnengo HF, Martín F. Dissociative and non-dissociative adsorption of O2 on Cu(111) and CuML/Ru(0001) surfaces: adiabaticity takes over. Phys Chem Chem Phys 2017; 19:10217-10221. [DOI: 10.1039/c7cp00753a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Adiabatic molecular spin-quenching during the approach of O2 to Cu(111) and CuML/Ru(0001) surfaces.
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Affiliation(s)
- M. Ramos
- Instituto de Fsica Rosario
- CONICET
- and Universidad Nacional de Rosario
- Rosario
- Argentina
| | - C. Díaz
- Departamento de Qumica Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Condensed Matter Physics Center (IFIMAC)
| | - A. E. Martínez
- Instituto de Fsica Rosario
- CONICET
- and Universidad Nacional de Rosario
- Rosario
- Argentina
| | - H. F. Busnengo
- Instituto de Fsica Rosario
- CONICET
- and Universidad Nacional de Rosario
- Rosario
- Argentina
| | - F. Martín
- Departamento de Qumica Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Condensed Matter Physics Center (IFIMAC)
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30
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Hernández-Rentero C, Vargas O, Caballero A, Morales J, Martín F. Solvothermal-induced 3D graphene networks: Role played by the structural and textural properties on lithium storage. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.11.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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31
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Ha DT, Yamazaki K, Wang Y, Alcamí M, Maeda S, Kono H, Martín F, Kukk E. Fragmentation network of doubly charged methionine: Interpretation using graph theory. J Chem Phys 2016; 145:094302. [DOI: 10.1063/1.4962061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- D. T. Ha
- Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - K. Yamazaki
- Department of Chemistry, Graduate School of Science, Tohoku University, 980-8578 Sendai, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Y. Wang
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
| | - M. Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
| | - S. Maeda
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - H. Kono
- Department of Chemistry, Graduate School of Science, Tohoku University, 980-8578 Sendai, Japan
| | - F. Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - E. Kukk
- Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
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32
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Lara-Astiaso M, Silva REF, Gubaydullin A, Rivière P, Meier C, Martín F. Enhancing High-Order Harmonic Generation in Light Molecules by Using Chirped Pulses. Phys Rev Lett 2016; 117:093003. [PMID: 27610851 DOI: 10.1103/physrevlett.117.093003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Indexed: 06/06/2023]
Abstract
One of the current challenges in high-harmonic generation is to extend the harmonic cutoff to increasingly high energies while maintaining or even increasing the efficiency of the high-harmonic emission. Here we show that the combined effect of down-chirped pulses and nuclear dynamics in light molecules allows one to achieve this goal, provided that long enough IR pulses are used to allow the nuclei to move well outside the Franck-Condon region. We also show that, by varying the duration of the chirped pulse or by performing isotopic substitution while keeping the pulse duration constant, one can control the extension of the harmonic plateau.
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Affiliation(s)
- M Lara-Astiaso
- Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - R E F Silva
- Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - A Gubaydullin
- Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Rivière
- Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - C Meier
- Laboratoire de Collisions Agrégats Réactivité, IRSAMC, UMR CNRS 5589, Université Paul Sabatier, 31062 Toulouse, France
| | - F Martín
- Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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33
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Waitz M, Metz D, Lower J, Schober C, Keiling M, Pitzer M, Mertens K, Martins M, Viefhaus J, Klumpp S, Weber T, Schmidt-Böcking H, Schmidt LPH, Morales F, Miyabe S, Rescigno TN, McCurdy CW, Martín F, Williams JB, Schöffler MS, Jahnke T, Dörner R. Two-Particle Interference of Electron Pairs on a Molecular Level. Phys Rev Lett 2016; 117:083002. [PMID: 27588854 DOI: 10.1103/physrevlett.117.083002] [Citation(s) in RCA: 4] [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: 05/18/2016] [Indexed: 06/06/2023]
Abstract
We investigate the photodouble ionization of H_{2} molecules with 400 eV photons. We find that the emitted electrons do not show any sign of two-center interference fringes in their angular emission distributions if considered separately. In contrast, the quasiparticle consisting of both electrons (i.e., the "dielectron") does. The work highlights the fact that nonlocal effects are embedded everywhere in nature where many-particle processes are involved.
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Affiliation(s)
- M Waitz
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - D Metz
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - J Lower
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - C Schober
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - M Keiling
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - M Pitzer
- Universität Kassel, Heinr.-Plett-Straße 40, 34132 Kassel, Germany
| | - K Mertens
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - M Martins
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J Viefhaus
- FS-PE, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - S Klumpp
- FS-FL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - T Weber
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - H Schmidt-Böcking
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - L Ph H Schmidt
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - F Morales
- Max-Born-Institut, Max Born Strasse 2 A, D-12489 Berlin, Germany
| | - S Miyabe
- Attosecond Science Research Team, RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - T N Rescigno
- Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - C W McCurdy
- Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Chemistry, University of California, Davis, California 95616, USA
| | - F Martín
- Departamento de Química, Universidad Autonoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, 28049 Madrid, Spain
| | - J B Williams
- Department of Physics, University of Nevada Reno, 1664 North Virginia Street Reno, Nevada 89557, USA
| | - M S Schöffler
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - T Jahnke
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - R Dörner
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
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Maclot S, Delaunay R, Piekarski DG, Domaracka A, Huber BA, Adoui L, Martín F, Alcamí M, Avaldi L, Bolognesi P, Díaz-Tendero S, Rousseau P. Determination of Energy-Transfer Distributions in Ionizing Ion-Molecule Collisions. Phys Rev Lett 2016; 117:073201. [PMID: 27563959 DOI: 10.1103/physrevlett.117.073201] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 06/06/2023]
Abstract
The ionization and fragmentation of the nucleoside thymidine in the gas phase has been investigated by combining ion collision with state-selected photoionization experiments and quantum chemistry calculations. The comparison between the mass spectra measured in both types of experiments allows us to accurately determine the distribution of the energy deposited in the ionized molecule as a result of the collision. The relation of two experimental techniques and theory shows a strong correlation between the excited states of the ionized molecule with the computed dissociation pathways, as well as with charge localization or delocalization.
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Affiliation(s)
- S Maclot
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - R Delaunay
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - D G Piekarski
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - A Domaracka
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - B A Huber
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - L Adoui
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - F Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEANanociencia), Cantoblanco 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - M Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEANanociencia), Cantoblanco 28049 Madrid, Spain
| | - L Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy
| | - P Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy
| | - S Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Rousseau
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
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Escudero-López B, Fernández-Pachón M, Herrero-Martín G, Ortega Á, Cerrillo I, Martín F, Berná G. Orange beverage ameliorates high-fat-diet-induced metabolic disorder in mice. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.04.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Balbuena J, Cruz-Yusta M, Cuevas AL, López-Escalante MC, Martín F, Pastor A, Sánchez L. Enhanced activity of α-Fe2O3 for photocatalytic NO removal. RSC Adv 2016. [DOI: 10.1039/c6ra19167c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Unique electrospun α-Fe2O3 fibers of singular nano-architecture were obtained exhibiting a highly enhanced NO conversion photocatalytic efficiency
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Affiliation(s)
- J. Balbuena
- Inorganic Chemistry Department
- Campus de Rabanales
- Universidad de Córdoba
- Córdoba
- Spain
| | - M. Cruz-Yusta
- Inorganic Chemistry Department
- Campus de Rabanales
- Universidad de Córdoba
- Córdoba
- Spain
| | - A. L. Cuevas
- Unidad de Nanotecnología
- Edificio de Bioinnovación
- Universidad de Málaga
- Málaga
- Spain
| | | | - F. Martín
- Chemical Engineering Department
- Campus de Teatinos
- Universidad de Málaga
- Málaga
- Spain
| | - A. Pastor
- Inorganic Chemistry Department
- Campus de Rabanales
- Universidad de Córdoba
- Córdoba
- Spain
| | - L. Sánchez
- Inorganic Chemistry Department
- Campus de Rabanales
- Universidad de Córdoba
- Córdoba
- Spain
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Cerrillo I, Fernández-Pachón MS, Collado-González J, Escudero-López B, Berná G, Herrero-Martín G, Martín F, Ferreres F, Gil-Izquierdo A. Effect of fermentation and subsequent pasteurization processes on amino acids composition of orange juice. Plant Foods Hum Nutr 2015; 70:153-159. [PMID: 25736875 DOI: 10.1007/s11130-015-0472-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The fermentation of fruit produces significant changes in their nutritional composition. An orange beverage has been obtained from the controlled alcoholic fermentation and thermal pasteurization of orange juice. A study was performed to determine the influence of both processes on its amino acid profile. UHPLC-QqQ-MS/MS was used for the first time for analysis of orange juice samples. Out of 29 amino acids and derivatives identified, eight (ethanolamine, ornithine, phosphoethanolamine, α-amino-n-butyric acid, hydroxyproline, methylhistidine, citrulline, and cystathionine) have not previously been detected in orange juice. The amino acid profile of the orange juice was not modified by its processing, but total amino acid content of the juice (8194 mg/L) was significantly increased at 9 days of fermentation (13,324 mg/L). Although the pasteurization process produced partial amino acid degradation, the total amino acid content was higher in the final product (9265 mg/L) than in the original juice, enhancing its nutritional value.
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Affiliation(s)
- I Cerrillo
- Área de Nutrición y Bromatología, Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013, Sevilla, Spain,
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38
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Riveros G, Garín C, Ramírez D, Dalchiele E, Marotti R, Pereyra C, Spera E, Gómez H, Grez P, Martín F, Ramos-Barrado J. Delafossite CuFeO2 thin films electrochemically grown from a DMSO based solution. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.02.226] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Simón M, García I, González V, Romero A, Martín F. Effect of grain size and heavy metals on As immobilization by marble particles. Environ Sci Pollut Res Int 2015; 22:6835-6841. [PMID: 25432428 DOI: 10.1007/s11356-014-3895-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
The effect of grain size and the interaction of heavy metals on As sorption by marble waste with different particle sizes was investigated. Acidic solutions containing only arsenic and a mixture of arsenic, lead, zinc, and cadmium were put in contact with the marble waste. The amount of metal(loid)s that were immobilized was calculated using the difference between the concentration in the acidic solution and in the liquid phase of the suspensions. Approximately 420 μg As m(-2) was sorbed onto the marble grains, both nonspecifically and specifically, where ≥ 80 % of the total arsenic in the acidic solution remained soluble, which suggests that this amendment is not effective to immobilize arsenic. However, in mixed contamination, relatively stable Pb-Ca arsenates were formed on the surface of the marble particles, and the soluble arsenic was reduced by 95 %, which indicates that marble particles can effectively immobilize arsenic and lead when both appear together.
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Affiliation(s)
- M Simón
- Agronomy Department, Soil Science Area, Almería University, Agrifood Campus of International Excellence ceiA3. Sacramento Road s/n, 04120, Almería, Spain
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40
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Dos Santos-Gómez L, Losilla ER, Martín F, Ramos-Barrado JR, Marrero-López D. Novel microstructural strategies to enhance the electrochemical performance of La0.8Sr0.2MnO3-δ cathodes. ACS Appl Mater Interfaces 2015; 7:7197-7205. [PMID: 25793738 DOI: 10.1021/acsami.5b00255] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Novel strategies based on spray-pyrolysis deposition are proposed to increase the triple-phase boundary (TPB) of La0.8Sr0.2MnO3-δ (LSM) cathodes in contact with yttria-stabilized zirconia (YSZ) electrolyte: (i) nanocrystalline LSM films deposited on as-prepared YSZ surface; (ii) the addition of poly(methyl methacrylate) microspheres as pore formers to further increase the porosity of the film cathodes; and (iii) the deposition of LSM by spray pyrolysis on backbones of Zr0.84Y0.16O1.92 (YSZ), Ce0.9Gd0.1O1.95 (CGO), and Bi1.5Y0.5O3-δ (BYO) previously fixed onto the YSZ. This last method is an alternative to the classical infiltration process with several advantages for large-scale manufacturing of planar solid oxide fuel cells (SOFCs), including easier industrial implementation, shorter preparation time, and low cost. The morphology and electrochemical performance of the electrodes are investigated by scanning electron microscopy and impedance spectroscopy. Very low values of area specific resistance are obtained, ranging from 1.4 Ω·cm(2) for LSM films deposited on as-prepared YSZ surface to 0.06 Ω-cm(2) for LSM deposited onto BYO backbone at a measured temperature of 650 °C. These electrodes exhibit high performance even after annealing at 950 °C, making them potentially suitable for applications in SOFCs at intermediate temperatures.
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Affiliation(s)
- L Dos Santos-Gómez
- †Departamento de Química Inorgánica and ‡Departamento de Física Aplicada I e Ingeniería Química, Laboratorio de Materiales y Superficie, Universidad de Málaga, 29071 Málaga, Spain
| | - E R Losilla
- †Departamento de Química Inorgánica and ‡Departamento de Física Aplicada I e Ingeniería Química, Laboratorio de Materiales y Superficie, Universidad de Málaga, 29071 Málaga, Spain
| | - F Martín
- †Departamento de Química Inorgánica and ‡Departamento de Física Aplicada I e Ingeniería Química, Laboratorio de Materiales y Superficie, Universidad de Málaga, 29071 Málaga, Spain
| | - J R Ramos-Barrado
- †Departamento de Química Inorgánica and ‡Departamento de Física Aplicada I e Ingeniería Química, Laboratorio de Materiales y Superficie, Universidad de Málaga, 29071 Málaga, Spain
| | - D Marrero-López
- †Departamento de Química Inorgánica and ‡Departamento de Física Aplicada I e Ingeniería Química, Laboratorio de Materiales y Superficie, Universidad de Málaga, 29071 Málaga, Spain
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Ayuso D, Kimura M, Kooser K, Patanen M, Plésiat E, Argenti L, Mondal S, Travnikova O, Sakai K, Palacios A, Kukk E, Decleva P, Ueda K, Martín F, Miron C. Vibrationally Resolved B 1s Photoionization Cross Section of BF3. J Phys Chem A 2015; 119:5971-8. [DOI: 10.1021/jp511416h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Ayuso
- Departamento de
Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - M. Kimura
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - K. Kooser
- Department
of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - M. Patanen
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin,
BP 48, 91192 Gif-sur-Yvette
Cedex, France
| | - E. Plésiat
- Departamento de
Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - L. Argenti
- Departamento de
Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S. Mondal
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - O. Travnikova
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin,
BP 48, 91192 Gif-sur-Yvette
Cedex, France
| | - K. Sakai
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - A. Palacios
- Departamento de
Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - E. Kukk
- Department
of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - P. Decleva
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste and CNR–Istituto Officina dei Materiali, 34127 Trieste, Italy
| | - K. Ueda
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - F. Martín
- Departamento de
Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics
Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - C. Miron
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin,
BP 48, 91192 Gif-sur-Yvette
Cedex, France
- Extreme Light Infrastructure
- Nuclear Physics (ELI-NP), “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Măgurele, Jud.
Ilfov, Romania
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Marrero-López D, dos Santos-Gómez L, Canales-Vázquez J, Martín F, Ramos-Barrado J. Stability and performance of nanostructured La0.8Sr0.2MnO3 cathodes deposited by spray-pyrolysis. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.04.154] [Citation(s) in RCA: 17] [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: 11/25/2022]
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Abilés V, Abilés J, Rodríguez-Ruiz S, Luna V, Martín F, Gándara N, Fernández-Santaella MC. [Effectiveness of cognitive behavioral therapy on weight loss after two years of bariatric surgery in morbidly obese patients]. NUTR HOSP 2014; 28:1109-14. [PMID: 23889628 DOI: 10.3305/nh.2013.28.4.6536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVE To evaluate the effectiveness of Cognitive Behavioral Therapy (CBT) in the success of postoperative weight loss after 2 years of CB. METHODS A prospective observational study was conducted in consecutive patients with morbid obesity aged between 18 and 59 yrs and enrolled in the bariatric surgery program of the Obesity Surgery Unit of our hospital from June 2007 through June 2010, with two years postoperative follow-up. Participants were divided into two groups according to their participation in Cognitive Behavioral Therapy or not. Over a 3-month period, CBT was applied in 12 2-h sessions. The main dependent variables studied were body weight and height, from which we calculated BMI and percentage of excess weight lost (weight lost x 100)/(initial weight-ideal weight), classifying patients as successful (E ) those with EPP > 50%, and unsuccessful (NE) those with EPP <50%. Participants were also, assessed for general (stress, anxiety, depression and self-esteem) and specific (binge eating and food craving) psychopathology. RESULTS Of the 35 patients with bariatric surgery, 30 responded postoperative evaluations, 16 underwent CBT before CB and 14 underwent surgery without receiving psycho-nutritional therapy, (76% female) with a mean age of 41 ± 9.5 years. The mean baseline BMI was 42 ± 10 and 45% of patients were classified as super obese (BMI: 56 ± 6). Mean excess weight loss (EPP) was 77%. According to the EPP were classified as "successful" (S) (59%) and "unsuccessful" (U) (41%). Of the patients assigned to S, 94% received CBT (15 individuals of 17 total), compared with only 12% who did not receive (2 individuals of the 17 total) with statistically significant differences (p < 0.05). Also, the S patients appeared to be significantly less anxious and stressed and have higher self-esteem (P < 0.05). Regarding specific psychopathology, the food craving guided by hunger, loss of control over food intake and guilt was lower in patients who achieved > 50% of EPP (p < 0.04, p < 0.001, p < 0.001, respectively). It was also noted that these patients were plans to eat less and ate less for positive reinforcement (p < 0.03 and p < 0.000, respectively) than the patient group NE. CONCLUSIONS Patients who achieved successful results in the evolution of weight loss at two years of CB are mostly (94%) who received CBT, presenting lower psychological comorbidity than NE. CBT could positively influence postoperative outcomes.
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Affiliation(s)
- V Abilés
- Unidad de Cirugía, Hospital Costa del Sol, Marbella, Málaga, España.
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Pereyra CJ, Ferrer F, Marotti RE, Gómez C, Campo L, Amy LI, Martín F, Leinen D, Ramos-Barrado JR, Dalchiele EA. Optical Properties of CdS and CdTe Sensitized ZnO Nanorods. ACTA ACUST UNITED AC 2014. [DOI: 10.1557/opl.2014.577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTOptical properties of ZnO-CdTe electrochemically prepared on a core-shell nanostructure (NS) were studied. Numerical simulations based on effective medium approximation give higher absorption than ZnO-CdS samples and a sensitive dependence on CdTe content. The absorption edges for deep black samples found by transmittance (T(λ)) and diffuse reflectance (Rdiff(λ)) measurements were at 1.33eV and 1.55eV, respectively. A split-off band edge was also found by Rdiff(λ) at ∼2.5eV. The red shift observed in T(λ), previously observed in ZnO-CdS, and may confirm the enhancement of sub-bandgap absorption due to the NS nature of samples.
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Wang Y, Solano Canchaya JG, Dong W, Alcamí M, Busnengo HF, Martín F. Chain-Length and Temperature Dependence of Self-Assembled Monolayers of Alkylthiolates on Au(111) and Ag(111) Surfaces. J Phys Chem A 2014; 118:4138-46. [DOI: 10.1021/jp412285v] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Y. Wang
- Departamento
de Química Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - J. G. Solano Canchaya
- Laboratorio
de Colisiones Atómicas, Facultad de Ciencias Exactas Ingeniería
y Agrimensura, Universidad Nacional de Rosario (UNR) and Instituto de Física de Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Pellegrini 250, 2000 Rosario, Argentina
| | - W. Dong
- Laboratoire
de Chimie, UMR 5182 CNRS, Ecole Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon Cedex 07, France
| | - M. Alcamí
- Departamento
de Química Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - H. F. Busnengo
- Laboratorio
de Colisiones Atómicas, Facultad de Ciencias Exactas Ingeniería
y Agrimensura, Universidad Nacional de Rosario (UNR) and Instituto de Física de Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Pellegrini 250, 2000 Rosario, Argentina
| | - F. Martín
- Departamento
de Química Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
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Ha DT, Wang Y, Alcamí M, Itälä E, Kooser K, Urpelainen S, Huels MA, Kukk E, Martín F. Fragmentation dynamics of doubly charged methionine in the gas phase. J Phys Chem A 2014; 118:1374-83. [PMID: 24517120 DOI: 10.1021/jp4113238] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The dependence of the fragmentation of doubly charged gas-phase methionine (C5H11NO2S) on the electronic-state character of the parent ion is studied experimentally by energy-resolved electron ion-ion coincidence spectroscopy. The parent dication electronic states are populated by Auger transitions following site-specific sulfur 2p core ionization. Two fragmentation channels are observed to be strongly dependent on the electronic states with vacancies in weakly bound molecular orbitals. All-electron calculations are applied to assign doubly charged final states of sulfur 2p core ionized methionine. In addition, the Car-Parrinello method is applied to model fragmentation dynamics of doubly charged methionine molecules with various initial temperatures to understand the typical characteristics of the molecular dissociation and partly to support the interpretation of experimental data.
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Affiliation(s)
- Dang Trinh Ha
- Department of Physics and Astronomy, University of Turku , FIN-20014 Turku, Finland
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Fernández-Pachón MS, Medina S, Herrero-Martín G, Cerrillo I, Berná G, Escudero-López B, Ferreres F, Martín F, García-Parrilla MC, Gil-Izquierdo A. Alcoholic fermentation induces melatonin synthesis in orange juice. J Pineal Res 2014; 56:31-8. [PMID: 24117835 DOI: 10.1111/jpi.12093] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Accepted: 09/06/2013] [Indexed: 12/18/2022]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine) is a molecule implicated in multiple biological functions. Its level decreases with age, and the intake of foods rich in melatonin has been considered an exogenous source of this important agent. Orange is a natural source of melatonin. Melatonin synthesis occurs during alcoholic fermentation of grapes, malt and pomegranate. The amino acid tryptophan is the precursor of all 5-methoxytryptamines. Indeed, melatonin appears in a shorter time in wines when tryptophan is added before fermentation. The aim of the study was to measure melatonin content during alcoholic fermentation of orange juice and to evaluate the role of the precursor tryptophan. Identification and quantification of melatonin during the alcoholic fermentation of orange juice was carried out by UHPLC-QqQ-MS/MS. Melatonin significantly increased throughout fermentation from day 0 (3.15 ng/mL) until day 15 (21.80 ng/mL) reaching larger amounts with respect to other foods. Melatonin isomer was also analysed, but its content remained stable ranging from 11.59 to 14.18 ng/mL. The enhancement of melatonin occurred mainly in the soluble fraction. Tryptophan levels significantly dropped from 13.80 mg/L (day 0) up to 3.19 mg/L (day 15) during fermentation. Melatonin was inversely and significantly correlated with tryptophan (r = 0.907). Therefore, the enhancement in melatonin could be due to both the occurrence of tryptophan and the new synthesis by yeast. In summary, the enhancement of melatonin in novel fermented orange beverage would improve the health benefits of orange juice by increasing this bioactive compound.
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Affiliation(s)
- M S Fernández-Pachón
- Área de Nutrición y Bromatología, Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Sevilla, Spain
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Pereyra CJ, Marotti RE, Guerguerian G, Elhordoy F, Campo L, Amy LI, Gau DL, Martín F, Leinen D, Ramos-Barrado JR, Dalchiele EA. Optical Properties of Sensitized Zinc Oxide Nanorods Electrochemically Prepared. ACTA ACUST UNITED AC 2013. [DOI: 10.1166/eef.2013.1061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ueda K, Miron C, Plésiat E, Argenti L, Patanen M, Kooser K, Ayuso D, Mondal S, Kimura M, Sakai K, Travnikova O, Palacios A, Decleva P, Kukk E, Martín F. Intramolecular photoelectron diffraction in the gas phase. J Chem Phys 2013; 139:124306. [DOI: 10.1063/1.4820814] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Martorell A, Alonso E, Boné J, Echeverría L, López M, Martín F, Nevot S, Plaza A. Position document: IgE-mediated allergy to egg protein. Allergol Immunopathol (Madr) 2013; 41:320-36. [PMID: 23830306 DOI: 10.1016/j.aller.2013.03.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Accepted: 03/25/2013] [Indexed: 11/25/2022]
Abstract
Egg is the food that most often causes allergy in young Spanish children, with an incidence of 2.4-2.6% in the first 2 years of life. The prevalence of sensitisation and allergy to egg is greater in children with allergy to cow's milk and in those suffering atopic dermatitis. The protein component from egg white is the cause of the allergic response in child. The major allergens in egg white are ovomucoid and ovalbumin. Most of the allergic reactions affect the skin, followed by gastrointestinal and respiratory systems. Egg allergy is one of the most common causes of severe anaphylaxis. The diagnosis of egg allergy is based on the existence of a suggestive clinical history, a positive allergy study and the subsequent application of controlled exposure testing, which represents the gold standard for confirming the diagnosis. The treatment of egg allergy is based on the avoidance of egg protein intake. A subgroup of egg-allergic patients are tolerant to cooked egg. In these cases, only uncooked egg must necessarily be avoided. Maintaining a diet with strict egg avoidance is difficult, and transgressions are relatively common. The patient, family, and school environment should receive education and training in the avoidance of egg and in the management of possible allergic reactions. With an avoidance diet, up to 15-20% of children will remain allergic and the severity of the reactions will increase over the years. In these more severe cases of egg-allergy, it becomes more difficult to adhere to the avoidance diet over the years, with a significant decrease in patient quality of life. Oral tolerance induction can be regarded as a therapeutic option for IgE-mediated egg allergy. The anti-IgE, omalizumab, might become another genuine therapeutic option for food allergy, not only to prevent allergic reactions after a contact with egg, but also as a complementary treatment to oral tolerance induction for egg allergy, with the purpose of reducing adverse reactions. The administration of influenza vaccine to children with egg allergy is safe in children that do not manifest severe reactions after egg intake, and in children who tolerate cooked egg. The triple viral vaccine (MMR) can be given to egg-allergic children in their usual vaccination centre, with no added risk. Different medicinal products can be formulated with egg proteins, and therefore should be avoided in children with egg allergy.
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