1
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Aguilar-Galindo F, Nguyen VTT, Singh R, Domaracka A, Huber BA, Díaz-Tendero S, Rousseau P, Maclot S. Unexpected and delayed fragmentation dynamics of the organometallic ferrocene induced by ion-collision. Phys Chem Chem Phys 2024; 26:7638-7646. [PMID: 38363201 DOI: 10.1039/d3cp05430f] [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: 02/17/2024]
Abstract
We have investigated the fragmentation dynamics of the organometallic ferrocene molecule after interaction with multiply charged ions using multicoincidence mass spectrometry and quantum chemistry calculations. We observed unexpected fragmentation dynamics of the two-body breakup channels from ferrocene dications revealing a charge screening effect from the iron atom and delayed fragmentation dynamics. These observations are rationalized through the population of a specific long-lived excited state, where one positive charge is located on each cyclopentadienyl ring.
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Affiliation(s)
- F Aguilar-Galindo
- Department of Chemistry, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - V T T Nguyen
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - R Singh
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - A Domaracka
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - B A Huber
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - S Díaz-Tendero
- Department of Chemistry, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Rousseau
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - S Maclot
- Institut Lumière Matière UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon, 69100 Villeurbanne, France.
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2
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Ganguly S, Gisselbrecht M, Eng-Johnsson P, Feifel R, Díaz-Tendero S, Muchová E, Milosavljević AR, Rousseau P, Maclot S. Resonant Inner-Shell Photofragmentation of Adamantane (C10H16). Molecules 2023; 28:5510. [PMID: 37513382 PMCID: PMC10384773 DOI: 10.3390/molecules28145510] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/10/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Adamantane, the smallest diamondoid molecule with a symmetrical cage, contains two distinct carbon sites, CH and CH2. The ionization/excitation of the molecule leads to the cage opening and strong structural reorganization. While theoretical predictions suggest that the carbon site CH primarily causes the cage opening, the role of the other CH2 site remains unclear. In this study, we used advanced experimental Auger electron-ion coincidence techniques and theoretical calculations to investigate the fragmentation dynamics of adamantane after resonant inner-shell photoexcitation. Our results demonstrate that some fragmentation channels exhibit site-sensitivity of the initial core-hole location, indicating that different carbon site excitations could lead to unique cage opening mechanisms.
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Affiliation(s)
- Smita Ganguly
- Department of Physics, Lund University, 22100 Lund, Sweden
| | | | | | - Raimund Feifel
- Department of Physics, University of Gothenburg, Origovagen 6 B, 41296 Gothenburg, Sweden
| | - Sergio Díaz-Tendero
- Department of Chemistry, Universidad Autonoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Eva Muchová
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
| | | | - Patrick Rousseau
- Normandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Sylvain Maclot
- Department of Physics, University of Gothenburg, Origovagen 6 B, 41296 Gothenburg, Sweden
- Institut Lumiere Matiere UMR 5306, Universite Claude Bernard Lyon 1, CNRS, Univ. Lyon, 69100 Villeurbanne, France
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3
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Mattioli G, Avaldi L, Bolognesi P, Casavola A, Morini F, Van Caekenberghe T, Bozek JD, Castrovilli MC, Chiarinelli J, Domaracka A, Indrajith S, Maclot S, Milosavljević AR, Nicolafrancesco C, Nicolas C, Rousseau P. A study of the valence photoelectron spectrum of uracil and mixed water-uracil clusters. J Chem Phys 2023; 158:114301. [PMID: 36948841 DOI: 10.1063/5.0135574] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
The valence ionization of uracil and mixed water-uracil clusters has been studied experimentally and by ab initio calculations. In both measurements, the spectrum onset shows a red shift with respect to the uracil molecule, with the mixed cluster characterized by peculiar features unexplained by the sum of independent contributions of the water or uracil aggregation. To interpret and assign all the contributions, we performed a series of multi-level calculations, starting from an exploration of several cluster structures using automated conformer-search algorithms based on a tight-binding approach. Ionization energies have been assessed on smaller clusters via a comparison between accurate wavefunction-based approaches and cost-effective DFT-based simulations, the latter of which were applied to clusters up to 12 uracil and 36 water molecules. The results confirm that (i) the bottom-up approach based on a multilevel method [Mattioli et al. Phys. Chem. Chem. Phys. 23, 1859 (2021)] to the structure of neutral clusters of unknown experimental composition converges to precise structure-property relationships and (ii) the coexistence of pure and mixed clusters in the water-uracil samples. A natural bond orbital (NBO) analysis performed on a subset of clusters highlighted the special role of H-bonds in the formation of the aggregates. The NBO analysis yields second-order perturbative energy between the H-bond donor and acceptor orbitals correlated with the calculated ionization energies. This sheds light on the role of the oxygen lone-pairs of the uracil CO group in the formation of strong H-bonds, with a stronger directionality in mixed clusters, giving a quantitative explanation for the formation of core-shell structures.
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Affiliation(s)
- Giuseppe Mattioli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 Monterotondo Scalo, Italy
| | - Lorenzo Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 Monterotondo Scalo, Italy
| | - Paola Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 Monterotondo Scalo, Italy
| | - Annarita Casavola
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 Monterotondo Scalo, Italy
| | - Filippo Morini
- X-lab, Faculty of Sciences, University of Hasselt, Campus Diepenbeek, BE 3590 Diepenbeek, Belgium
| | - Thomas Van Caekenberghe
- X-lab, Faculty of Sciences, University of Hasselt, Campus Diepenbeek, BE 3590 Diepenbeek, Belgium
| | - John D Bozek
- Synchrotron SOLEIL, L'Orme de Merisiers, 91192, Saint Aubin, BP48, 1192 Gif-sur-Yvette Cedex, France
| | - Mattea C Castrovilli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 Monterotondo Scalo, Italy
| | - Jacopo Chiarinelli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 Monterotondo Scalo, Italy
| | - Alicja Domaracka
- Normandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | | | - Sylvain Maclot
- Institut Lumière Matière, UMR5306 CNRS, Université Claude Bernard Lyon 1, 69622 Villeurbanne CEDEX, France
| | | | - Chiara Nicolafrancesco
- Synchrotron SOLEIL, L'Orme de Merisiers, 91192, Saint Aubin, BP48, 1192 Gif-sur-Yvette Cedex, France
| | - Christophe Nicolas
- Synchrotron SOLEIL, L'Orme de Merisiers, 91192, Saint Aubin, BP48, 1192 Gif-sur-Yvette Cedex, France
| | - Patrick Rousseau
- Normandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
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4
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Licht O, Barreiro-Lage D, Rousseau P, Giuliani A, Milosavljević AR, Isaak A, Mastai Y, Albeck A, Singh R, Nguyen VTT, Nahon L, Martínez-Fernández L, Díaz-Tendero S, Toker Y. Peptide Bond Formation in the Protonated Serine Dimer Following Vacuum UV Photon-Induced Excitation. Angew Chem Int Ed Engl 2023; 62:e202218770. [PMID: 36789791 DOI: 10.1002/anie.202218770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/14/2023] [Accepted: 02/14/2023] [Indexed: 02/16/2023]
Abstract
Possible routes for intra-cluster bond formation (ICBF) in protonated serine dimers have been studied. We found no evidence of ICBF following low energy collision-induced dissociation (in correspondence with previous works), however, we do observe clear evidence for ICBF following photon absorption in the 4.6-14 eV range. Moreover, the comparison of photon-induced dissociation measurements of the protonated serine dimer to those of a protonated serine dipeptide provides evidence that ICBF, in this case, involves peptide bond formation (PBF). The experimental results are supported by ab initio molecular dynamics and exploration of several excited state potential energy surfaces, unraveling a pathway for PBF following photon absorption. The combination of experiments and theory provides insight into the PBF mechanisms in clusters of amino acids, and reveals the importance of electronic excited states reached upon UV/VUV light excitation.
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Affiliation(s)
- Ori Licht
- Physics Department and Institute for Nanotehcnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Darío Barreiro-Lage
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Alexandre Giuliani
- Synchrotron SOLEIL L'Orme des Merisiers Départementale 128, 91190, Saint-Aubin, France.,INRAE, UAR1008, Transform Department, Rue de la Géraudière BP 71627, 44316, Nantes, France
| | | | - Avinoam Isaak
- Chemistry Department and Institute for Nanotehcnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Yitzhak Mastai
- Chemistry Department and Institute for Nanotehcnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Amnon Albeck
- Chemistry Department and Institute for Nanotehcnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Raj Singh
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Vy T T Nguyen
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Laurent Nahon
- Synchrotron SOLEIL L'Orme des Merisiers Départementale 128, 91190, Saint-Aubin, France
| | - Lara Martínez-Fernández
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Sergio Díaz-Tendero
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Yoni Toker
- Physics Department and Institute for Nanotehcnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, 5290002, Israel
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5
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Licht O, Barreiro-Lage D, Rousseau P, Giuliani A, Milosavljevic A, Isaak A, Mastai Y, Albeck A, Singh R, Nguyen V, Nahon L, Martinez L, Díaz-Tendero S, Toker Y. Peptide Bond Formation in Protonated Serine Dimer Following VUV Photon‐Induced Excitation. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202218770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- Ori Licht
- Bar-Ilan University Physics Departement Departement of PhysicsBar Ilan University 5290002 Ramat Gan ISRAEL
| | - Dario Barreiro-Lage
- Universidad Autónoma de Madrid: Universidad Autonoma de Madrid Chemistry SPAIN
| | | | | | | | | | - Yitzhak Mastai
- Bar-Ilan University Chemistry Departement of PhysicsBar Ilan University 5290002 Ramat Gan ISRAEL
| | - Amnon Albeck
- Bar-Ilan University Chemistry Departement of PhysicsBar Ilan University 5290002 Ramat Gan ISRAEL
| | - Raj Singh
- Normandie Université: Normandie Universite Physics FRANCE
| | - Vy Nguyen
- Normandie Université: Normandie Universite Physics FRANCE
| | | | | | | | - Yoni Toker
- Bar-Ilan University Physics Departement Insitute of Nanotechnology and Advanced MaterialsBuilding 206 room 708 5290002 Ramat Gan ISRAEL
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6
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Schwemmer P, Pederson R, Haecker K, Bocher P, Fort J, Mercker M, Jiguet F, Elts J, Marja R, Piha M, Rousseau P, Garthe S. Assessing potential conflicts between offshore wind farms and migration patterns of a threatened shorebird species. Anim Conserv 2022. [DOI: 10.1111/acv.12817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- P. Schwemmer
- Research and Technology Centre (FTZ) University of Kiel Büsum Germany
| | - R. Pederson
- Research and Technology Centre (FTZ) University of Kiel Büsum Germany
| | - K. Haecker
- Research and Technology Centre (FTZ) University of Kiel Büsum Germany
| | - P. Bocher
- Littoral Environnement et Sociétés Laboratory (LIENSs) La Rochelle University – CNRS La Rochelle France
| | - J. Fort
- Littoral Environnement et Sociétés Laboratory (LIENSs) La Rochelle University – CNRS La Rochelle France
| | - M. Mercker
- Bionum GmbH – Consultants in Biological Statistics Hamburg Germany
| | - F. Jiguet
- UMR7204 CESCO, Museum National D'Histoire Naturelle, CNRS, Sorbonne Université Paris France
| | - J. Elts
- Birdlife Estonia Tartu Estonia
| | - R. Marja
- Birdlife Estonia Tartu Estonia
- 'Lendület' Landscape and Conservation Ecology Institute of Ecology and Botany, Centre for Ecological Research Vácrátót Hungary
| | - M. Piha
- Natural Resources Institute Finland Helsinkiarkus Finland
- Finnish Museum of Natural History Helsinki Finland
| | - P. Rousseau
- National Nature Reserve of Moëze‐Oléron LPO Ligue pour la Protection des Oiseaux Saint‐Froult France
| | - S. Garthe
- Research and Technology Centre (FTZ) University of Kiel Büsum Germany
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7
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Barreiro-Lage D, Nicolafrancesco C, Kočišek J, Luna A, Kopyra J, Alcamí M, Huber BA, Martín F, Domaracka A, Rousseau P, Díaz-Tendero S. Controlling the diversity of ion-induced fragmentation pathways by N-methylation of amino acids. Phys Chem Chem Phys 2022; 24:941-954. [PMID: 34913940 DOI: 10.1039/d1cp04097a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We present a combined experimental and theoretical study of the fragmentation of singly and doubly N-methylated glycine (sarcosine and N,N-dimethyl glycine, respectively) induced by low-energy (keV) O6+ ions. Multicoincidence mass spectrometry techniques and quantum chemistry simulations (ab initio molecular dynamics and density functional theory) allow us to characterise different fragmentation pathways as well as the associated mechanisms. We focus on the fragmentation of doubly ionised species, for which coincidence measurements provide unambiguous information on the origin of the various charged fragments. We have found that single N-methylation leads to a larger variety of fragmentation channels than in no methylation of glycine, while double N-methylation effectively closes many of these fragmentation channels, including some of those appearing in pristine glycine. Importantly, the closure of fragmentation channels in the latter case does not imply a protective effect by the methyl group.
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Affiliation(s)
- Darío Barreiro-Lage
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain.
| | - Chiara Nicolafrancesco
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France. .,Synchrotron SOLEIL, LOrme des Merisiers, St Aubin, BP 48, Gif sur Yvette Cedex 91192, France
| | - Jaroslav Kočišek
- J. Heyrovsky Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejskova 3, Prague 18223, Czech Republic
| | - Alberto Luna
- Centro de Computación Científica, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Janina Kopyra
- Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, Siedlce 08-110, Poland
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Bernd A Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
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8
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Deranque C, Rouffet A, Dejean M, Rousseau P. Reconstruction des pertes de substances du nez : algorithme décisionnel à propos de 229 cas. ANN CHIR PLAST ESTH 2022; 67:7-13. [DOI: 10.1016/j.anplas.2021.12.002] [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] [Received: 10/26/2021] [Revised: 11/22/2021] [Accepted: 12/20/2021] [Indexed: 11/16/2022]
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9
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Ganguly S, Gisselbrecht M, Eng-Johnsson P, Feifel R, Hervieux PA, Alfaytarouni Z, Fink RF, Díaz-Tendero S, Milosavljevic A, Rousseau P, Maclot S. Coincidence study of core-ionized adamantane: Site-sensitivity within a carbon cage? Phys Chem Chem Phys 2022; 24:28994-29003. [DOI: 10.1039/d2cp04426a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We investigate the fragmentation dynamics of adamantane dications produced after core-ionization at the carbon edge followed by Auger decay. The combination of high-resolution electron spectroscopy, energy-resolved electron-ion multi-coincidence spectroscopy and...
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10
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Kim D, Theberge V, Provencher S, Yassa M, Kong I, Perera F, Lavertu S, Rousseau P, Lee J, Karam I, Schneider K, Chambers S, Levine M, Parpia S, Whelan T. OPAR: A Multicenter Phase II Randomized Trial of Fractionation Schedules for Once-a-Day Accelerated Partial Breast Irradiation (APBI). Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Rousseau P, González-Vázquez J, Piekarski DG, Kopyra J, Domaracka A, Alcamí M, Adoui L, Huber BA, Díaz-Tendero S, Martín F. Timing of charge migration in betaine by impact of fast atomic ions. Sci Adv 2021; 7:eabg9080. [PMID: 34597129 PMCID: PMC10938492 DOI: 10.1126/sciadv.abg9080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
The way molecules break after ion bombardment is intimately related to the early electron dynamics generated in the system, in particular, charge (or electron) migration. We exploit the natural positive-negative charge splitting in the zwitterionic molecule betaine to selectively induce double electron removal from its negatively charged side by impact of fast O6+ ions. The loss of two electrons in this localized region of the molecular skeleton triggers a competition between direct Coulomb explosion and charge migration that is examined to obtain temporal information from ion-ion coincident measurements and nonadiabatic molecular dynamics calculations. We find a charge migration time, from one end of the molecule to the other, of approximately 20 to 40 femtoseconds. This migration time is longer than that observed in molecules irradiated by ultrashort light pulses and is the consequence of charge migration being driven by adiabatic nuclear dynamics in the ground state of the molecular dication.
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Affiliation(s)
- Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Jesús González-Vázquez
- 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
| | - Dariusz G. Piekarski
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Janina Kopyra
- Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, 08-110 Siedlce, Poland
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Manuel Alcamí
- 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
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nano), Cantoblanco, 28049 Madrid, Spain
| | - Lamri Adoui
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Bernd A. Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Sergio Díaz-Tendero
- 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
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nano), Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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12
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Mattioli G, Avaldi L, Bolognesi P, Bozek JD, Castrovilli MC, Chiarinelli J, Domaracka A, Indrajith S, Maclot S, Milosavljević AR, Nicolafrancesco C, Rousseau P. Water-biomolecule clusters studied by photoemission spectroscopy and multilevel atomistic simulations: hydration or solvation? Phys Chem Chem Phys 2021; 23:15049-15058. [PMID: 34231588 DOI: 10.1039/d1cp02031e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The properties of mixed water-uracil nanoaggregates have been probed by core electron-photoemission measurements to investigate supramolecular assembly in the gas phase driven by weak interactions. The interpretation of the measurements has been assisted by multilevel atomistic simulations, based on semi-empirical tight-binding and DFT-based methods. Our protocol established a positive-feedback loop between experimental and computational techniques, which has enabled a sound and detailed atomistic description of such complex heterogeneous molecular aggregates. Among biomolecules, uracil offers interesting and generalized skeletal features; its structure encompasses an alternation of hydrophilic H-bond donor and acceptor sites and hydrophobic moieties, typical in biomolecular systems, that induces a supramolecular core-shell-like organization of the mixed clusters with a water core and an uracil shell. This structure is far from typical models of both solid-state hydration, with water molecules in defined positions, or liquid solvation, where disconnected uracil molecules are completely surrounded by water.
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Affiliation(s)
- Giuseppe Mattioli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10, Monterotondo Scalo, Italy.
| | - Lorenzo Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10, Monterotondo Scalo, Italy.
| | - Paola Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10, Monterotondo Scalo, Italy.
| | - John D Bozek
- Synchrotron SOLEIL, L'Orme de Merisiers, 91192, Saint Aubin, BP48, 1192, Gif-sur-Yvette Cedex, France
| | - Mattea C Castrovilli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10, Monterotondo Scalo, Italy.
| | - Jacopo Chiarinelli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10, Monterotondo Scalo, Italy.
| | - Alicja Domaracka
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | | | - Sylvain Maclot
- Physics Department, University of Gothenburg, Origovägen 6B, 41296 Göteborg, Sweden
| | | | - Chiara Nicolafrancesco
- Synchrotron SOLEIL, L'Orme de Merisiers, 91192, Saint Aubin, BP48, 1192, Gif-sur-Yvette Cedex, France and Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Patrick Rousseau
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
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Erdmann E, Aguirre NF, Indrajith S, Chiarinelli J, Domaracka A, Rousseau P, Huber BA, Bolognesi P, Richter R, Avaldi L, Díaz-Tendero S, Alcamí M, Łabuda M. A general approach to study molecular fragmentation and energy redistribution after an ionizing event. Phys Chem Chem Phys 2021; 23:1859-1867. [PMID: 33439170 DOI: 10.1039/d0cp04890a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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
We propose to combine quantum chemical calculations, statistical mechanical methods, and photoionization and particle collision experiments to unravel the redistribution of internal energy of the furan cation and its dissociation pathways. This approach successfully reproduces the relative intensity of the different fragments as a function of the internal energy of the system in photoelectron-photoion coincidence experiments and the different mass spectra obtained when ions ranging from Ar+ to Xe25+ or electrons are used in collision experiments. It provides deep insights into the redistribution of the internal energy in the ionized molecule and its influence on the dissociation pathways and resulting charged fragments. The present pilot study demonstrates the efficiency of a statistical exchange of excitation energy among various degrees of freedom of the molecule and proves that the proposed approach is mature to be extended to more complex systems.
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Affiliation(s)
- Ewa Erdmann
- Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
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14
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Rousseau P, Piekarski DG, Capron M, Domaracka A, Adoui L, Martín F, Alcamí M, Díaz-Tendero S, Huber BA. Polypeptide formation in clusters of β-alanine amino acids by single ion impact. Nat Commun 2020; 11:3818. [PMID: 32732937 PMCID: PMC7393107 DOI: 10.1038/s41467-020-17653-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 07/01/2020] [Indexed: 11/17/2022] Open
Abstract
The formation of peptide bonds by energetic processing of amino acids is an important step towards the formation of biologically relevant molecules. As amino acids are present in space, scenarios have been developed to identify the roots of life on Earth, either by processes occurring in outer space or on Earth itself. We study the formation of peptide bonds in single collisions of low-energy He2+ ions (α-particles) with loosely bound clusters of β-alanine molecules at impact energies typical for solar wind. Experimental fragmentation mass spectra produced by collisions are compared with results of molecular dynamics simulations and an exhaustive exploration of potential energy surfaces. We show that peptide bonds are efficiently formed by water molecule emission, leading to the formation of up to tetrapeptide. The present results show that a plausible route to polypeptides formation in space is the collision of energetic ions with small clusters of amino acids.
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Affiliation(s)
- Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France.
| | - Dariusz G Piekarski
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Michael Capron
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Lamri Adoui
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Fernando 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 Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049, Madrid, Spain
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049, Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Sergio 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.
| | - Bernd A Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
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Med J, Sršeň Š, Slavíček P, Domaracka A, Indrajith S, Rousseau P, Fárník M, Fedor J, Kočišek J. Vibrationally Mediated Stabilization of Electrons in Nonpolar Matter. J Phys Chem Lett 2020; 11:2482-2489. [PMID: 32154726 DOI: 10.1021/acs.jpclett.0c00278] [Citation(s) in RCA: 3] [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: 06/10/2023]
Abstract
We explore solvation of electrons in nonpolar matter, here represented by butadiene clusters. Isolated butadiene supports only the existence of transient anions (resonances). Two-dimensional electron energy loss spectroscopy shows that the resonances lead to an efficient vibrational excitation of butadiene, which can result into the almost complete loss of energy of the interacting electron. Cluster-beam experiments show that molecular clusters of butadiene form stable anions, however only at sizes of more than 9 molecular units. We have calculated the distribution of electron affinities of clusters using classical and path integral molecular dynamics simulations. There is almost a continuous transition from the resonant to the bound anions with an increase in cluster size. The comparison of the classical and quantum dynamics reveals that the electron binding is strongly supported by molecular vibrations, brought about by nuclear zero-point motion and thermal agitation. We also inspected the structure of the solvated electron, finding it well localized.
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Affiliation(s)
- Jakub Med
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Štěpán Sršeň
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Petr Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
| | - A Domaracka
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - S Indrajith
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - P Rousseau
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - M Fárník
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
| | - J Fedor
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
| | - J Kočišek
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
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16
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Renoud J, Indrajith S, Domaracka A, Rousseau P, Moretto-Capelle P, Huber BA, Champeaux JP. Interaction of hydantoin with solar wind minority ions: O 6+ and He 2. Phys Chem Chem Phys 2020; 22:5785-5796. [PMID: 32105280 DOI: 10.1039/c9cp06230k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The laboratory study of prebiotic molecules interacting with solar wind ions is important to understand their role in the emergence of life in the complex context of the astrochemistry of circumstellar environments. In this work, we present the first study of the interaction of hydantoin (C3N2O2H4, 100 a.m.u.) with solar wind minority multi-charged ions: O6+ at 30 keV and He2+ at 8 keV. The fragmentation mass spectra as well as correlation maps resulting from the interaction are presented and discussed in this paper. Prompt and delayed dissociations from metastable states of the ionized molecule have been observed and the corresponding lifetimes measured. Experimental results are completed by quantum Density Functional Theory (DFT) calculations for energies, structures and dynamics (Internal Reaction Coordinates and Dynamic Reaction Coordinates) of the molecule for its different reachable charge states and the major observed fragmentation pathways. These calculations show that the molecule can only support two charges before spontaneously dissociating in agreement with the experimental observations. Calculations also demonstrate that hydantoin's ring opens after double ionization of the molecule which may enhance its reactivity in the background of biological molecule formation in a cirmcumstellar environment. For the major experimentally observed fragmentations (like 44 a.m.u./56 a.m.u. dissociation), Internal Reaction Coordinate (IRC) calculations were performed pointing out for example the important role of hydrogen transfer in the fragmentation processes.
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Affiliation(s)
- Julie Renoud
- Laboratoire Collisions Agrégats et Réactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France.
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Schury D, Kumar A, Méry A, Chesnel JY, Lévy A, Macé S, Prigent C, Ramillon JM, Rangama J, Rousseau P, Steydli S, Trassinelli M, Vernhet D, Lamour E. An electrostatic in-line charge-state purification system for multicharged ions in the kiloelectronvolt energy range. Rev Sci Instrum 2019; 90:083306. [PMID: 31472612 DOI: 10.1063/1.5093407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
The performance of a newly built omega type electrostatic analyzer designed to act as an in-line charge-state purification system for ions in the kiloelectronvolt energy range is reported. The analyzer consists of a set of four consecutive electrostatic 140° concentric cylindrical electrodes enclosed by Matsuda electrodes. This setup was recently tested and validated using O5+, Ar9+, and Xe20+ ion beams at an energy of 14 qkeV at the ARIBE facility. A resolving power of 10.5 and a transmission of 100% of the desired charge state are measured allowing a good purification of incoming ion beams with charge states up to 10+ and a fairly good purification for charge states at least up to 20+. In comparison with other in-line solutions such as the Wien filter, our system has the advantage of being purely electrostatic and therefore lacking common drawbacks as, for example, hysteresis.
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Affiliation(s)
- Daniel Schury
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Ajit Kumar
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Alain Méry
- CIMAP, CEA/CNRS/ENSICAEN/Université de Caen Normandie, 6 Boulevard du Maréchal Juin 14050 Caen, France
| | - Jean-Yves Chesnel
- CIMAP, CEA/CNRS/ENSICAEN/Université de Caen Normandie, 6 Boulevard du Maréchal Juin 14050 Caen, France
| | - Anna Lévy
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Stéphane Macé
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Christophe Prigent
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Jean-Marc Ramillon
- CIMAP, CEA/CNRS/ENSICAEN/Université de Caen Normandie, 6 Boulevard du Maréchal Juin 14050 Caen, France
| | - Jimmy Rangama
- CIMAP, CEA/CNRS/ENSICAEN/Université de Caen Normandie, 6 Boulevard du Maréchal Juin 14050 Caen, France
| | - Patrick Rousseau
- CIMAP, CEA/CNRS/ENSICAEN/Université de Caen Normandie, 6 Boulevard du Maréchal Juin 14050 Caen, France
| | - Sébastien Steydli
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Martino Trassinelli
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Dominique Vernhet
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
| | - Emily Lamour
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France
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Gruson D, Helleputte T, Rousseau P, Gruson D. Data science, artificial intelligence, and machine learning: Opportunities for laboratory medicine and the value of positive regulation. Clin Biochem 2019; 69:1-7. [PMID: 31022391 DOI: 10.1016/j.clinbiochem.2019.04.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 04/17/2019] [Accepted: 04/19/2019] [Indexed: 12/16/2022]
Abstract
Artificial intelligence (AI) and data science are rapidly developing in healthcare, as is their translation into laboratory medicine. Our review article presents an overview of the data science domain while discussing the reasons for its emergence. We also present several perspectives of its applications in clinical laboratories, along with potential ethical challenges related to AI and data science.
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Affiliation(s)
- Damien Gruson
- Department of Laboratory Medicine, Cliniques Universitaires St-Luc and Université Catholique de Louvain, Brussels, Belgium; Pôle de recherche en Endocrinologie, Diabète et Nutrition, Institut de Recherche Expérimentale et Clinique, Cliniques Universitaires St-Luc and Université Catholique de Louvain, Brussels, Belgium.
| | | | - Patrick Rousseau
- Department of Laboratory Medicine, Cliniques Universitaires St-Luc and Université Catholique de Louvain, Brussels, Belgium
| | - David Gruson
- Genetics Regulation for Paris Descartes-University, Paris, France
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Rouffet A, Marie D, Boucher S, Deranque C, Martin L, Rousseau P. Prise en charge des lésions cutanées de pseudoxanthome élastique en chirurgie plastique. Ann Dermatol Venereol 2018. [DOI: 10.1016/j.annder.2018.09.540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gelis A, Colin D, Perrouin-Verbe B, Deboissezon X, Bensmail D, Casanova D, Rousseau P, Barrois B. French guidelines from PERSE, SoFCPRE and SOFMER for the medical and surgical management of pressure ulcers in persons with spinal cord injury. Ann Phys Rehabil Med 2018; 61:352-354. [DOI: 10.1016/j.rehab.2018.05.1318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/24/2018] [Accepted: 05/26/2018] [Indexed: 11/28/2022]
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Domaracka A, Delaunay R, Mika A, Gatchell M, Zettergren H, Cederquist H, Rousseau P, Huber BA. Ion collision-induced chemistry in pure and mixed loosely bound clusters of coronene and C 60 molecules. Phys Chem Chem Phys 2018; 20:15052-15060. [PMID: 29790511 DOI: 10.1039/c8cp01179f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Ionization, fragmentation and molecular growth have been studied in collisions of 22.5 keV He2+- or 3 keV Ar+-projectiles with pure loosely bound clusters of coronene (C24H12) molecules or with loosely bound mixed C60-C24H12 clusters by using mass spectrometry. The heavier and slower Ar+ projectiles induce prompt knockout-fragmentation - C- and/or H-losses - from individual molecules and highly efficient secondary molecular growth reactions before the clusters disintegrate on picosecond timescales. The lighter and faster He2+ projectiles have a higher charge and the main reactions are then ionization by ions that are not penetrating the clusters. This leads mostly to cluster fragmentation without molecular growth. However, here penetrating collisions may also lead to molecular growth but to a much smaller extent than with 3 keV Ar+. Here we present fragmentation and molecular growth mass distributions with 1 mass unit resolution, which reveals that the same numbers of C- and H-atoms often participate in the formation and breaking of covalent bonds inside the clusters. We find that masses close to those with integer numbers of intact coronene molecules, or with integer numbers of both intact coronene and C60 molecules, are formed where often one or several H-atoms are missing or have been added on. We also find that super-hydrogenated coronene is formed inside the clusters.
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Affiliation(s)
- Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France.
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Schwob L, Lalande M, Chesnel JY, Domaracka A, Huber BA, Maclot S, Poully JC, Rangama J, Rousseau P, Vizcaino V, Adoui L, Méry A. A tandem mass spectrometer for crossed-beam irradiation of mass-selected molecular systems by keV atomic ions. Rev Sci Instrum 2018; 89:043104. [PMID: 29716322 DOI: 10.1063/1.5023182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present paper, we describe a new home-built crossed-beam apparatus devoted to ion-induced ionization and fragmentation of isolated biologically relevant molecular systems. The biomolecular ions are produced by an electrospray ionization source, mass-over-charge selected, accumulated in a 3D ion trap, and then guided to the extraction region of an orthogonal time-of-flight mass spectrometer. Here, the target molecular ions interact with a keV atomic ion beam produced by an electron cyclotron resonance ion source. Cationic products from the collision are detected on a position sensitive detector and analyzed by time-of-flight mass spectrometry. A detailed description of the operation of the setup is given, and early results from irradiation of a protonated pentapeptide (leucine-enkephalin) by a 7 keV He+ ion beam are presented as a proof-of-principle.
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Affiliation(s)
- Lucas Schwob
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Mathieu Lalande
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Jean-Yves Chesnel
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Alicja Domaracka
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Bernd A Huber
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Sylvain Maclot
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | | | - Jimmy Rangama
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Patrick Rousseau
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Violaine Vizcaino
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Lamri Adoui
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Alain Méry
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
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Vimont T, Arnaud D, Rouffet A, Giot JP, Florczak AS, Rousseau P. Hübner's tarsomarginal grafts in eyelid reconstruction: 94 cases. J Stomatol Oral Maxillofac Surg 2018. [PMID: 29530736 DOI: 10.1016/j.jormas.2018.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Preserving the integrity of the eyelid margin in eyelid reconstruction remains a challenge for plastic surgeons. In 1976, Hübner described a technique to repair full-thickness eyelid defects using a tarsomarginal graft covered with a local flap. This simple technique addresses both functional and aesthetic requirements of eyelid reconstruction by using tissue from the contralateral eyelid. The aim of this study was to determine the appropriate role of this uncommon technique in eyelid reconstruction. METHOD In total, 94 tarsomarginal grafts were performed on 70 patients. Eight surgeons participated in this study. Data were retrospectively collected from patients' charts and all information regarding surgical indications, histology, defect size and topography, operative time, immediate result, and potential complications were recorded. RESULTS Only one of the patients suffered total necrosis. Partial wound dehiscence occurred in one case and partial necrosis occurred in 6 cases. No major sequelae were observed in the donor eyelids. In 100% of cases, eyelid margin integrity was otherwise preserved. Four patients required revision surgery for insufficient malignancy resection and 13 patients for long-term eyelid ectropion or scar retraction. CONCLUSION This simple and reliable technique ensured the closure of full-thickness eyelid defects covering up to 3/4 of the eyelid length. The procedure should be more widely used as it guarantees high-quality eyelid reconstruction.
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Affiliation(s)
- T Vimont
- Department of plastic surgery, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex, France.
| | - D Arnaud
- Department of plastic surgery, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex, France
| | - A Rouffet
- Department of plastic surgery, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex, France
| | - J-P Giot
- Department of plastic surgery, CHU Grenoble-Alpes, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - A S Florczak
- Department of plastic surgery, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex, France
| | - P Rousseau
- Department of plastic surgery, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex, France
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Chiarinelli J, Bolognesi P, Domaracka A, Rousseau P, Castrovilli MC, Richter R, Chatterjee S, Wang F, Avaldi L. Insights into the dissociative ionization of glycine by PEPICO experiments. Phys Chem Chem Phys 2018; 20:22841-22848. [PMID: 30151535 DOI: 10.1039/c8cp03473g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fragmentation of glycine (NH2CH2COOH) has been studied by photoelectron–photoion coincidence, PEPICO, experiments at 60 eV photon energy.
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Affiliation(s)
- Jacopo Chiarinelli
- Dipartimento di Scienze, Università di Roma Tre
- Roma
- Italy
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1
- Monterotondo Scalo
| | - Paola Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1
- Monterotondo Scalo
- Italy
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP
- 14000 Caen
- France
| | - Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP
- 14000 Caen
- France
| | | | - Robert Richter
- Molecular Modelling Discovery Laboratory, Department of Chemistry and Biotechnology
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne
- Vic 3122
- Australia
| | | | - Feng Wang
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163.5
- Basovizza
- Italy
| | - Lorenzo Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1
- Monterotondo Scalo
- Italy
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Jolicoeur M, David S, Rousseau P, Mondat M. Long-Term Follow-up for High-Dose-Rate Interstitial Brachytherapy and Lumpectomy as a Second Conservative Treatment for Local Recurrences of Breast Cancer. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gatchell M, Delaunay R, D'Angelo G, Mika A, Kulyk K, Domaracka A, Rousseau P, Zettergren H, Huber BA, Cederquist H. Ion-induced molecular growth in clusters of small hydrocarbon chains. Phys Chem Chem Phys 2017; 19:19665-19672. [PMID: 28503696 DOI: 10.1039/c7cp02090b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on studies of collisions between 3 keV Ar+ projectile ions and neutral targets of isolated 1,3-butadiene (C4H6) molecules and cold, loosely bound clusters of these molecules. We identify molecular growth processes within the molecular clusters that appears to be driven by knockout processes and that could result in the formation of (aromatic) ring structures. These types of reactions are not unique to specific projectile ions and target molecules, but will occur whenever atoms or ions with suitable masses and kinetic energies collide with aggregates of matter, such as carbonaceous grains in the interstellar medium or aerosol nanoparticles in the atmosphere.
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Affiliation(s)
- Michael Gatchell
- Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden.
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27
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Huguier V, Paulus E, Fradet J, Rousseau P, Bertheuil N. [Light sources usable by the plastic surgeon in the absence of photographic studio]. ANN CHIR PLAST ESTH 2017; 62:314-321. [PMID: 28285884 DOI: 10.1016/j.anplas.2017.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 02/08/2017] [Indexed: 11/19/2022]
Abstract
Medical photography is an important part of the medical file and is widely used in medical communication, especially in our discipline. His practice has to be the most standardized and reproducible as possible, which distinguishes it from artistic photography. Photography fix the light reflecting from a subject, so surgeon have to control of the light source in any environment. In the absence of dedicated studio, using external cobra or ring flashes with special diffusers allow the surgeon to have light sources adapted to the different conditions encountered in daily practice.
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Affiliation(s)
- V Huguier
- Service de chirurgie plastique, CHU, 2, rue de la Milétrie, CS 90577, 86021 Poitiers cedex, France.
| | - E Paulus
- Service de chirurgie plastique, CHU, 2, rue de la Milétrie, CS 90577, 86021 Poitiers cedex, France
| | - J Fradet
- Service de chirurgie plastique, CHU, 2, rue de la Milétrie, CS 90577, 86021 Poitiers cedex, France
| | - P Rousseau
- Service de chirurgie plastique, CHU, 4, rue Larrey, 49100 Angers, France
| | - N Bertheuil
- Service de chirurgie plastique, CHU, 16, boulevard de Bulgarie, 35200 Rennes, France
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28
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Milosavljević AR, Rousseau P, Domaracka A, Huber BA, Giuliani A. Multiple electron capture from isolated protein poly-anions in collision with slow highly charged ions. Phys Chem Chem Phys 2017; 19:19691-19698. [DOI: 10.1039/c7cp02075a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiply charged ions very efficiently capture several electrons from trapped mass/charge selected protein poly-anions, producing dominantly charge-reduced proteins and small neutral losses.
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Affiliation(s)
- A. R. Milosavljević
- Synchrotron SOLEIL
- 91192 Gif-sur-Yvette
- France
- Institute of Physics Belgrade
- University of Belgrade
| | | | | | | | - A. Giuliani
- Synchrotron SOLEIL
- 91192 Gif-sur-Yvette
- France
- INRA
- U1008
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29
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Piekarski DG, Delaunay R, Mika A, Maclot S, Adoui L, Martín F, Alcamí M, Huber BA, Rousseau P, Díaz-Tendero S, Domaracka A. Production of doubly-charged highly reactive species from the long-chain amino acid GABA initiated by Ar9+ionization. Phys Chem Chem Phys 2017; 19:19609-19618. [DOI: 10.1039/c7cp00903h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We present a combined experimental and theoretical study of the fragmentation of multiply-charged γ-aminobutyric acid molecules (GABAz+,z= 2, 3) in the gas phase.
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Affiliation(s)
| | | | | | | | | | - Fernando Martín
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - Manuel Alcamí
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | | | | | - Sergio Díaz-Tendero
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
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30
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Castrovilli MC, Markush P, Bolognesi P, Rousseau P, Maclot S, Cartoni A, Delaunay R, Domaracka A, Kočišek J, Huber BA, Avaldi L. Fragmentation of pure and hydrated clusters of 5Br-uracil by low energy carbon ions: observation of hydrated fragments. Phys Chem Chem Phys 2017; 19:19807-19814. [DOI: 10.1039/c7cp02233f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The fragmentation of the isolated 5-bromouracil (5BrU) molecule and pure and nano-hydrated 5BrU clusters induced by low energy 12C4+ ions has been studied.
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Affiliation(s)
| | | | | | | | - S. Maclot
- Normandie Université
- ENSICAEN
- UNICAEN
- CEA
- CNRS
| | - A. Cartoni
- CNR-ISM
- Monterotondo Scalo
- Italy
- Dipartimento di Chimica
- Sapienza Università di Roma
| | | | | | - J. Kočišek
- Normandie Université
- ENSICAEN
- UNICAEN
- CEA
- CNRS
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31
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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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32
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Herard C, Arnaud D, Goga D, Rousseau P, Potier B. Rapid onset of squamous cell carcinoma in a thin skin graft donor site. Ann Dermatol Venereol 2016; 143:457-61. [PMID: 27083971 DOI: 10.1016/j.annder.2015.03.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 01/26/2015] [Accepted: 03/31/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND Squamous cell carcinomas are malignant tumours of epithelial origin that can appear on sites subjected to chronic inflammation after a period of several years. The rapid development of squamous cell carcinoma at the donor site for a thin skin graft is a rare and poorly understood situation. PATIENTS AND METHODS We report the case of a patient undergoing thin skin grafting to cover the area of removal of a vertex squamous cell carcinoma and in whom squamous cell carcinoma appeared at the donor site within 9 weeks. DISCUSSION In our case, we ruled out intraoperative contamination because two sets of surgical instruments were used. Given the number of cases reported in the literature, a chance event seems unlikely. The hypothesis of an acute inflammatory process caused by scarring of the thin skin graft site appears to us the most convincing. Development of cancer at the graft donor site may thus be added to the list of complications of thin skin grafting.
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Affiliation(s)
- C Herard
- Department of plastic, reconstructive and aesthetic surgery, hôpital Trousseau, CHU de Tours, avenue de la République, 37170 Chambray-Lès-Tours, France.
| | - D Arnaud
- Department of plastic, reconstructive and aesthetic surgery, CHU d'Angers, 4, rue Larrey, 49933 Angers, France
| | - D Goga
- Department of plastic, reconstructive and aesthetic surgery, hôpital Trousseau, CHU de Tours, avenue de la République, 37170 Chambray-Lès-Tours, France
| | - P Rousseau
- Department of plastic, reconstructive and aesthetic surgery, CHU d'Angers, 4, rue Larrey, 49933 Angers, France
| | - B Potier
- Department of plastic, reconstructive and aesthetic surgery, polyclinique du Parc, 49300 Cholet, France
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33
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Markush P, Bolognesi P, Cartoni A, Rousseau P, Maclot S, Delaunay R, Domaracka A, Kocisek J, Castrovilli MC, Huber BA, Avaldi L. The role of the environment in the ion induced fragmentation of uracil. Phys Chem Chem Phys 2016; 18:16721-9. [DOI: 10.1039/c6cp01940d] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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 fragmentation of uracil molecules and pure and nano-hydrated uracil clusters by 12C4+ ion impact is investigated.
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Affiliation(s)
| | | | - Antonella Cartoni
- CNR-ISM
- Monterotondo Scalo
- Italy
- Dipartimento di Chimica
- Sapienza Università di Roma
| | - Patrick Rousseau
- Normandie Université
- CIMAP (UMR6252 CEA/CNRS/ENSICAEN/UNICAEN)
- 14070 Caen Cedex 5
- France
| | - Sylvain Maclot
- Normandie Université
- CIMAP (UMR6252 CEA/CNRS/ENSICAEN/UNICAEN)
- 14070 Caen Cedex 5
- France
| | - Rudy Delaunay
- Normandie Université
- CIMAP (UMR6252 CEA/CNRS/ENSICAEN/UNICAEN)
- 14070 Caen Cedex 5
- France
| | - Alicja Domaracka
- Normandie Université
- CIMAP (UMR6252 CEA/CNRS/ENSICAEN/UNICAEN)
- 14070 Caen Cedex 5
- France
| | - Jaroslav Kocisek
- Normandie Université
- CIMAP (UMR6252 CEA/CNRS/ENSICAEN/UNICAEN)
- 14070 Caen Cedex 5
- France
- J. Heyrovský Institute of Physical Chemistry
| | | | - Bernd A. Huber
- Normandie Université
- CIMAP (UMR6252 CEA/CNRS/ENSICAEN/UNICAEN)
- 14070 Caen Cedex 5
- France
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34
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Kocisek J, Piekarski DG, Delaunay R, Huber BA, Adoui L, Martín F, Alcamí M, Rousseau P, Domaracka A, Kopyra J, Díaz-Tendero S. N-Acetylglycine Cation Tautomerization Enabled by the Peptide Bond. J Phys Chem A 2015; 119:9581-9. [PMID: 26243533 DOI: 10.1021/acs.jpca.5b06009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a combined experimental and theoretical study of the ionization of N-acetylglycine molecules by 48 keV O(6+) ions. We focus on the single ionization channel of this interaction. In addition to the prompt fragmentation of the N-acetylglycine cation, we also observe the formation of metastable parent ions with lifetimes in the microsecond range. On the basis of density functional theory calculations, we assign these metastable ions to the diol tautomer of N-acetylglycine. In comparison with the simple amino acids, the tautomerization rate is higher because of the presence of the peptide bond. The study of a simple biologically relevant molecule containing a peptide bond allows us to demonstrate how increasing the complexity of the structure influences the behavior of the ionized molecule.
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Affiliation(s)
- Jaroslav Kocisek
- CIMAP, UMR 6252 (CEA/CNRS/ENSICAEN/UCBN), Bd. Henri Becquerel, BP 5133, 14070 Caen Cedex 5, France
| | | | - Rudy Delaunay
- CIMAP, UMR 6252 (CEA/CNRS/ENSICAEN/UCBN), Bd. Henri Becquerel, BP 5133, 14070 Caen Cedex 5, France.,Université de Caen Basse-Normandie , Esplanade de la Paix, CS 14032, 14032 Caen Cedex 5, France
| | - Bernd A Huber
- CIMAP, UMR 6252 (CEA/CNRS/ENSICAEN/UCBN), Bd. Henri Becquerel, BP 5133, 14070 Caen Cedex 5, France
| | - Lamri Adoui
- CIMAP, UMR 6252 (CEA/CNRS/ENSICAEN/UCBN), Bd. Henri Becquerel, BP 5133, 14070 Caen Cedex 5, France.,Université de Caen Basse-Normandie , Esplanade de la Paix, CS 14032, 14032 Caen Cedex 5, France
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid , 28049 Madrid, Spain
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - Patrick Rousseau
- CIMAP, UMR 6252 (CEA/CNRS/ENSICAEN/UCBN), Bd. Henri Becquerel, BP 5133, 14070 Caen Cedex 5, France.,Université de Caen Basse-Normandie , Esplanade de la Paix, CS 14032, 14032 Caen Cedex 5, France
| | - Alicja Domaracka
- CIMAP, UMR 6252 (CEA/CNRS/ENSICAEN/UCBN), Bd. Henri Becquerel, BP 5133, 14070 Caen Cedex 5, France
| | - Janina Kopyra
- Faculty of Science, Siedlce University , 3 Maja 54, 08-110 Siedlce, Poland
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain
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35
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Bolognesi P, Kettunen JA, Cartoni A, Richter R, Tosic S, Maclot S, Rousseau P, Delaunay R, Avaldi L. Site- and state-selected photofragmentation of 2Br-pyrimidine. Phys Chem Chem Phys 2015; 17:24063-9. [PMID: 26314495 DOI: 10.1039/c5cp02601f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The fragmentation of the 2Br-pyrimidine molecule following direct valence photoionization or inner shell excitation has been studied by electron-ion coincidence experiments. 2Br-pyrimidine has been chosen as a model for the class of pyrimidinic building blocks of three nucleic acids and several radiosensitizers. It is known that the site- and state-localization of energy deposition, typical of inner shell excitation, results in the enhancement of the total ion yield as well as in changes in the relative intensity of the different fragmentation channels. Here we address the question of the origin of this selective fragmentation by using electron-ion coincidence techniques. The results show that the fragmentation is strongly selective in the final singly charged ion state, independently of the process that leads to the population of that state, and the dominant fragmentation patterns correlate with the nearest appearance potential.
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Affiliation(s)
- P Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma1, Monterotondo Scalo, Italy.
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36
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Chen T, Gatchell M, Stockett MH, Delaunay R, Domaracka A, Micelotta ER, Tielens AGGM, Rousseau P, Adoui L, Huber BA, Schmidt HT, Cederquist H, Zettergren H. Formation of H2 from internally heated polycyclic aromatic hydrocarbons: excitation energy dependence. J Chem Phys 2015; 142:144305. [PMID: 25877576 DOI: 10.1063/1.4917021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We have investigated the effectiveness of molecular hydrogen (H2) formation from Polycyclic Aromatic Hydrocarbons (PAHs) which are internally heated by collisions with keV ions. The present and earlier experimental results are analyzed in view of molecular structure calculations and a simple collision model. We estimate that H2 formation becomes important for internal PAH temperatures exceeding about 2200 K, regardless of the PAH size and the excitation agent. This suggests that keV ions may effectively induce such reactions, while they are unlikely due to, e.g., absorption of single photons with energies below the Lyman limit. The present analysis also suggests that H2 emission is correlated with multi-fragmentation processes, which means that the [PAH-2H](+) peak intensities in the mass spectra may not be used for estimating H2-formation rates.
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Affiliation(s)
- T Chen
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M Gatchell
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M H Stockett
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - R Delaunay
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - A Domaracka
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - E R Micelotta
- Université Paris Sud, Institut d'Astrophysique Spatiale, UMR 8617, 91405 Orsay, France
| | - A G G M Tielens
- Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
| | - P Rousseau
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - L Adoui
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - B A Huber
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen cedex 05, France
| | - H T Schmidt
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Cederquist
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Zettergren
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
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37
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Rousseau P. Silvia's blessing. Neurology 2015; 84:2379-80. [DOI: 10.1212/wnl.0000000000001664] [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: 11/15/2022] Open
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38
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Delaunay R, Gatchell M, Rousseau P, Domaracka A, Maclot S, Wang Y, Stockett MH, Chen T, Adoui L, Alcamí M, Martín F, Zettergren H, Cederquist H, Huber BA. Molecular Growth Inside of Polycyclic Aromatic Hydrocarbon Clusters Induced by Ion Collisions. J Phys Chem Lett 2015; 6:1536-42. [PMID: 26263308 DOI: 10.1021/acs.jpclett.5b00405] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The present work combines experimental and theoretical studies of the collision between keV ion projectiles and clusters of pyrene, one of the simplest polycyclic aromatic hydrocarbons (PAHs). Intracluster growth processes induced by ion collisions lead to the formation of a wide range of new molecules with masses larger than that of the pyrene molecule. The efficiency of these processes is found to strongly depend on the mass and velocity of the incoming projectile. Classical molecular dynamics simulations of the entire collision process-from the ion impact (nuclear scattering) to the formation of new molecular species-reproduce the essential features of the measured molecular growth process and also yield estimates of the related absolute cross sections. More elaborate density functional tight binding calculations yield the same growth products as the classical simulations. The present results could be relevant to understand the physical chemistry of the PAH-rich upper atmosphere of Saturn's moon Titan.
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Affiliation(s)
- Rudy Delaunay
- †CIMAP (UMR6252 CEA/CNRS/Ensicaen/Unicaen), Bd Henri Becquerel, BP 5133, 14070 Caen cedex 5, France
- ‡Université de Caen Basse-Normandie, Esplanade de la Paix, CS 14032, 14032 Caen cedex 5, France
| | - Michael Gatchell
- ¶Department of Physics, Stockholm University, AlbaNova University Center, S-10691 Stockholm, Sweden
| | - Patrick Rousseau
- †CIMAP (UMR6252 CEA/CNRS/Ensicaen/Unicaen), Bd Henri Becquerel, BP 5133, 14070 Caen cedex 5, France
- ‡Université de Caen Basse-Normandie, Esplanade de la Paix, CS 14032, 14032 Caen cedex 5, France
| | - Alicja Domaracka
- †CIMAP (UMR6252 CEA/CNRS/Ensicaen/Unicaen), Bd Henri Becquerel, BP 5133, 14070 Caen cedex 5, France
| | - Sylvain Maclot
- †CIMAP (UMR6252 CEA/CNRS/Ensicaen/Unicaen), Bd Henri Becquerel, BP 5133, 14070 Caen cedex 5, France
- ‡Université de Caen Basse-Normandie, Esplanade de la Paix, CS 14032, 14032 Caen cedex 5, France
| | - Yang Wang
- ∥Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - Mark H Stockett
- ¶Department of Physics, Stockholm University, AlbaNova University Center, S-10691 Stockholm, Sweden
| | - Tao Chen
- ¶Department of Physics, Stockholm University, AlbaNova University Center, S-10691 Stockholm, Sweden
| | - Lamri Adoui
- †CIMAP (UMR6252 CEA/CNRS/Ensicaen/Unicaen), Bd Henri Becquerel, BP 5133, 14070 Caen cedex 5, France
- ‡Université de Caen Basse-Normandie, Esplanade de la Paix, CS 14032, 14032 Caen cedex 5, France
| | - Manuel Alcamí
- ∥Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - Fernando Martín
- ∥Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - Henning Zettergren
- ¶Department of Physics, Stockholm University, AlbaNova University Center, S-10691 Stockholm, Sweden
| | - Henrik Cederquist
- ¶Department of Physics, Stockholm University, AlbaNova University Center, S-10691 Stockholm, Sweden
| | - Bernd A Huber
- †CIMAP (UMR6252 CEA/CNRS/Ensicaen/Unicaen), Bd Henri Becquerel, BP 5133, 14070 Caen cedex 5, France
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Chen T, Gatchell M, Stockett MH, Alexander JD, Zhang Y, Rousseau P, Domaracka A, Maclot S, Delaunay R, Adoui L, Huber BA, Schlathölter T, Schmidt HT, Cederquist H, Zettergren H. Absolute fragmentation cross sections in atom-molecule collisions: scaling laws for non-statistical fragmentation of polycyclic aromatic hydrocarbon molecules. J Chem Phys 2015; 140:224306. [PMID: 24929387 DOI: 10.1063/1.4881603] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
We present scaling laws for absolute cross sections for non-statistical fragmentation in collisions between Polycyclic Aromatic Hydrocarbons (PAH/PAH(+)) and hydrogen or helium atoms with kinetic energies ranging from 50 eV to 10 keV. Further, we calculate the total fragmentation cross sections (including statistical fragmentation) for 110 eV PAH/PAH(+) + He collisions, and show that they compare well with experimental results. We demonstrate that non-statistical fragmentation becomes dominant for large PAHs and that it yields highly reactive fragments forming strong covalent bonds with atoms (H and N) and molecules (C6H5). Thus nonstatistical fragmentation may be an effective initial step in the formation of, e.g., Polycyclic Aromatic Nitrogen Heterocycles (PANHs). This relates to recent discussions on the evolution of PAHNs in space and the reactivities of defect graphene structures.
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Affiliation(s)
- T Chen
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M Gatchell
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - M H Stockett
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - J D Alexander
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - Y Zhang
- Department of Mathematics, Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
| | - P Rousseau
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - A Domaracka
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - S Maclot
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - R Delaunay
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - L Adoui
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - B A Huber
- CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, F-14070 Caen Cedex 05, France
| | - T Schlathölter
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - H T Schmidt
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Cederquist
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
| | - H Zettergren
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden
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Marchand A, Rousseau P, Croue A, Vidaud D, Wolkenstein P, Martin L. Late diagnosis of neurofibromatosis type 1 in an 81-year-old patient. Clin Exp Dermatol 2015; 40:225-6. [DOI: 10.1111/ced.12403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2014] [Indexed: 11/28/2022]
Affiliation(s)
- A. Marchand
- Department of Dermatology; University Hospital of Angers; Angers France
| | - P. Rousseau
- Department of Plastic Surgery; University Hospital of Angers; Angers France
| | - A. Croue
- Department of Pathology; University Hospital of Angers; Angers France
| | - D. Vidaud
- Department of Molecular Genetics and Biochemistry; Beaujeon University Hospital; Clichy France
| | - P. Wolkenstein
- Department of Dermatology; University Hospital of Angers; Angers France
| | - L. Martin
- Department of Dermatology; University Hospital of Angers; Angers France
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41
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Piekarski DG, Delaunay R, Maclot S, Adoui L, Martín F, Alcamí M, Huber BA, Rousseau P, Domaracka A, Díaz-Tendero S. Unusual hydroxyl migration in the fragmentation of β-alanine dication in the gas phase. Phys Chem Chem Phys 2015; 17:16767-78. [DOI: 10.1039/c5cp01628b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Experimental and theoretical investigations show that hydroxyl migration leads to unexpected fragmentation dynamics of β-alanine dication in the gas phase.
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Affiliation(s)
| | - Rudy Delaunay
- CIMAP (UMR 6252) - CEA
- CNRS
- ENSICAEN
- Unicaen
- 14070 Caen Cedex 5
| | - Sylvain Maclot
- CIMAP (UMR 6252) - CEA
- CNRS
- ENSICAEN
- Unicaen
- 14070 Caen Cedex 5
| | - Lamri Adoui
- CIMAP (UMR 6252) - CEA
- CNRS
- ENSICAEN
- Unicaen
- 14070 Caen Cedex 5
| | - Fernando Martín
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - Manuel Alcamí
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - Bernd A. Huber
- CIMAP (UMR 6252) - CEA
- CNRS
- ENSICAEN
- Unicaen
- 14070 Caen Cedex 5
| | | | | | - Sergio Díaz-Tendero
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
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42
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Stockett MH, Gatchell M, Alexander JD, Bērziņš U, Chen T, Farid K, Johansson A, Kulyk K, Rousseau P, Støchkel K, Adoui L, Hvelplund P, Huber BA, Schmidt HT, Zettergren H, Cederquist H. Fragmentation of anthracene C14H10, acridine C13H9N and phenazine C12H8N2ions in collisions with atoms. Phys Chem Chem Phys 2014; 16:21980-7. [DOI: 10.1039/c4cp03293d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Rousseau P, Mahé G. [Endothelial function: role, assessment and limits]. J Mal Vasc 2013. [PMID: 24355615 DOI: 10.1016/j.jmv.2013.11.004.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
For several years, detecting and preventing cardiovascular diseases have become a major issue. Different methods have been developed to evaluate endothelial function. Endothelial dysfunction is one of the first steps leading to atherosclerosis. This review presents an insight into endothelial function, the interests of its assessment and methods for studying endothelial function. To date, the vascular endothelium must be considered as a specific organ with its own functions that contribute to the homeostasis of the cardiovascular system. Endothelial dysfunction typically corresponds to a decrease of nitric oxide NO bioavailability. Biological or physico-chemical methods may be used to assess dysfunction. Biological methods allow measuring NO metabolites and pro-inflammatory and vasoconstrictor mediators released by the endothelium. The physico-chemical methods include intra-coronary injections, plethysmography, flow-mediated dilation (FMD), digital plethysmography and optical techniques using laser (laser Doppler single-point, laser Doppler imager, laser speckle contrast imaging) that can be coupled with provocation tests (iontophoresis, microdialysis, post-ischemic hyperemia, local heating). The principle of each technique and its use in clinical practice are discussed. Studying endothelial dysfunction is a particularly promising field because of new drugs being developed. Nevertheless, assessment methodology still needs further development to enable reliable, non-invasive, reproducible, and inexpensive ways to analyze endothelial dysfunction.
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Affiliation(s)
- C Puissant
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - P Abraham
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France; Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France
| | - S Durand
- EA 4334 motricity, interactions, and performance, LUNAM université, université du Maine, 72085 Le Mans cedex 9, France
| | - A Humeau-Heurtier
- Laboratoire d'ingénierie des systèmes automatisés (LISA), LUNAM université, université d'Angers, 49000 Angers, France
| | - S Faure
- Stress oxydant et pathologies métaboliques (SOPAM), Inserm U1063, LUNAM université, université d'Angers, 40045 Angers, France
| | - P Rousseau
- Département de chirurgie plastique, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - G Mahé
- Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France; Pôle imagerie médicale, centre hospitalier universitaire Pontchaillou, 2, avenue du Pr-Léon-Bernard, 35033 Rennes cedex 9, France.
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44
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Rousseau P, Mahé G. [Endothelial function: role, assessment and limits]. ACTA ACUST UNITED AC 2013; 39:47-56. [PMID: 24355615 DOI: 10.1016/j.jmv.2013.11.004] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 10/24/2013] [Indexed: 12/16/2022]
Abstract
For several years, detecting and preventing cardiovascular diseases have become a major issue. Different methods have been developed to evaluate endothelial function. Endothelial dysfunction is one of the first steps leading to atherosclerosis. This review presents an insight into endothelial function, the interests of its assessment and methods for studying endothelial function. To date, the vascular endothelium must be considered as a specific organ with its own functions that contribute to the homeostasis of the cardiovascular system. Endothelial dysfunction typically corresponds to a decrease of nitric oxide NO bioavailability. Biological or physico-chemical methods may be used to assess dysfunction. Biological methods allow measuring NO metabolites and pro-inflammatory and vasoconstrictor mediators released by the endothelium. The physico-chemical methods include intra-coronary injections, plethysmography, flow-mediated dilation (FMD), digital plethysmography and optical techniques using laser (laser Doppler single-point, laser Doppler imager, laser speckle contrast imaging) that can be coupled with provocation tests (iontophoresis, microdialysis, post-ischemic hyperemia, local heating). The principle of each technique and its use in clinical practice are discussed. Studying endothelial dysfunction is a particularly promising field because of new drugs being developed. Nevertheless, assessment methodology still needs further development to enable reliable, non-invasive, reproducible, and inexpensive ways to analyze endothelial dysfunction.
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Affiliation(s)
- C Puissant
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - P Abraham
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France; Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France
| | - S Durand
- EA 4334 motricity, interactions, and performance, LUNAM université, université du Maine, 72085 Le Mans cedex 9, France
| | - A Humeau-Heurtier
- Laboratoire d'ingénierie des systèmes automatisés (LISA), LUNAM université, université d'Angers, 49000 Angers, France
| | - S Faure
- Stress oxydant et pathologies métaboliques (SOPAM), Inserm U1063, LUNAM université, université d'Angers, 40045 Angers, France
| | - P Rousseau
- Département de chirurgie plastique, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - G Mahé
- Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France; Pôle imagerie médicale, centre hospitalier universitaire Pontchaillou, 2, avenue du Pr-Léon-Bernard, 35033 Rennes cedex 9, France.
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45
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Rousseau P, Arnaud D, Huguier V, Chemli H, Dhouib M, Bali D, Darsonval V. [Aesthetic reconstructive surgery of the lip]. ANN CHIR PLAST ESTH 2013; 58:601-27. [PMID: 24135286 DOI: 10.1016/j.anplas.2013.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 06/02/2013] [Indexed: 11/19/2022]
Abstract
Lip reconstruction can be performed with numerous surgical techniques. The aim was here to present these usual techniques and to focus on the details that can be used to obtain the most favourable results. The goal of this surgery, that represents a compromise between function and aesthetic, has to be kept in mind to prevent mistakes that decrease the quality of the result.
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Affiliation(s)
- P Rousseau
- Service de chirurgie plastique, esthétique et reconstructrice, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex 01, France.
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Huguier V, Dagrégorio G, Darsonval V, Arnaud D, Potier B, Rousseau P. [Cheek reconstruction]. ANN CHIR PLAST ESTH 2013; 58:457-514. [PMID: 24125779 DOI: 10.1016/j.anplas.2013.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 07/03/2013] [Indexed: 11/29/2022]
Abstract
We describe the different cheek reconstruction techniques with primary emphasis on the superficial layers. In addition to the clinical context, location and size of the lesion will be taken into account to choose the best method that will optimize the functional and aesthetic results while minimizing potential sequelae. Main evaluation criteria include absence of natural orifice deformation, scar location, skin cover quality and respect of volumes.
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Affiliation(s)
- V Huguier
- Service de chirurgie plastique, CHU, 2, rue de la Milétrie, 86021 Poitiers cedex, France.
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47
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Arnaud D, Beuzeboc M, Huguier V, Darsonval V, Rousseau P. [Forehead and temple aesthetic reconstruction]. ANN CHIR PLAST ESTH 2013; 58:389-427. [PMID: 24041665 DOI: 10.1016/j.anplas.2013.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 06/02/2013] [Indexed: 10/26/2022]
Abstract
The purpose of this article is to address the techniques of reconstruction of the forehead and the temple trying to add an "aesthetic" dimension, as the fourth dimension introduced by Burget for the reconstructive surgery of the nose. Achieve "aesthetic" reconstruction is to have constant attention to details. This is how to choose the right indication depending on the age and the etiology of the defect. This is to place incisions to perfection. And it is to be humble and open oneself to criticism, always seeking to improve the quality of its results.
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Affiliation(s)
- D Arnaud
- Service de chirurgie plastique, reconstructrice et esthétique, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex 9, France.
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48
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Baraër F, Darsonval V, Lejeune F, Bochot-Hermouet B, Rousseau P. [Eyebrow reconstruction]. ANN CHIR PLAST ESTH 2013; 58:428-36. [PMID: 23896574 DOI: 10.1016/j.anplas.2013.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Accepted: 06/23/2013] [Indexed: 11/24/2022]
Abstract
The eyebrow is an essential anatomical area, from a social point of view, so its reconstruction, in case of skin defect, must be as meticulous as possible, with the less residual sequela. Capillary density extremely varies from one person to another and the different methods of restoration of this area should absolutely take this into consideration. We are going to review the various techniques of reconstruction, according to the sex and the surface to cover.
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Affiliation(s)
- F Baraër
- Service de chirurgie plastique, clinique Brétéché, 3, rue de la Béraudière, 44000 Nantes, France.
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49
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Seitz F, Zettergren H, Rousseau P, Wang Y, Chen T, Gatchell M, Alexander JD, Stockett MH, Rangama J, Chesnel JY, Capron M, Poully JC, Domaracka A, Méry A, Maclot S, Vizcaino V, Schmidt HT, Adoui L, Alcamí M, Tielens AGGM, Martín F, Huber BA, Cederquist H. Ions colliding with clusters of fullerenes—Decay pathways and covalent bond formations. J Chem Phys 2013; 139:034309. [DOI: 10.1063/1.4812790] [Citation(s) in RCA: 19] [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: 01/13/2023] Open
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50
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Zettergren H, Rousseau P, Wang Y, Seitz F, Chen T, Gatchell M, Alexander JD, Stockett MH, Rangama J, Chesnel JY, Capron M, Poully JC, Domaracka A, Méry A, Maclot S, Schmidt HT, Adoui L, Alcamí M, Tielens AGGM, Martín F, Huber BA, Cederquist H. Formations of dumbbell C118 and C119 inside clusters of C60 molecules by collision with α particles. Phys Rev Lett 2013; 110:185501. [PMID: 23683214 DOI: 10.1103/physrevlett.110.185501] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Indexed: 05/26/2023]
Abstract
We report highly selective covalent bond modifications in collisions between keV alpha particles and van der Waals clusters of C(60) fullerenes. Surprisingly, C(119)(+) and C(118)(+) are the dominant molecular fusion products. We use molecular dynamics simulations to show that C(59)(+) and C(58)(+) ions--effectively produced in prompt knockout processes with He(2+)--react rapidly with C(60) to form dumbbell C(119)(+) and C(118)(+). Ion impact on molecular clusters in general is expected to lead to efficient secondary reactions of interest for astrophysics. These reactions are different from those induced by photons.
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Affiliation(s)
- H Zettergren
- Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden.
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