search
4,318,720 Research products

  • Publications
  • FR

10
arrow_drop_down
Relevance
arrow_drop_down
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: De Méritens, Patrice; Fitoussi, Jean-Paul;
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ SPIRE - Sciences Po ...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ SPIRE - Sciences Po ...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Cardenas, Daniela E.; Auer, Lucas; Morin, Emmanuelle; Carrillo-Tarazona, Yisel; +6 Authors

    Puccinia kuehnii, the causal agent of orange rust, is a fungal pathogen that induced significant losses to the sugarcane crop in Florida since 2007. During plant infection, rust fungi deliver effector proteins into host tissues to manipulate plant functions and promote parasitic growth. Identiflcation and functional characterization of secreted effectors are essential steps to understand the molecular basis of host-pathogen interactions. Like other biotrophic fungi, Puccinia species possess large repertoires of secreted proteins whose vast majority has no known function.The objective of our investigations is to identify genes encoding secreted proteins, including relevant disease-related candidate effectors that are expressed during sugarcane infection by the orange rust pathogen. In a first experiment, healthy leaves of sugarcane cultivars CPB9-2743 (susceptible to orange rust) and CP96-1252 (resistant) were inoculated with race 2743 of P. kuehnii. In a second experiment, healthy leaves of sugarcane cultivars CL85-1040 (susceptible) and CP96-1,252 (resistant) were inoculated with race 1040 of the pathogen. Total RNA was extracted at 0-72 days after inoculation and transcript expression was quantilified through Illumina RNA-sequencing. Differential gene expression profiling was then determined for the compatible and incompatible interactions using DESeq2. Ongoing work includes characterization of effector proteins differentiating races 1040 and 2743 of P. kuehnii. Our longterm goal is to identify a set of candidate effector proteins for identification of host defense related proteins in marker-assisted breeding of sugarcane.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Article . 2022
    Data sources: Agritrop
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Article . 2022
      Data sources: Agritrop
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Sanon, H.O.; Koné, Nadine; Botoni, Hazin Edwige; Poissonet, Jacques; +2 Authors

    Ce travail met en relief la nécessité d'adopter une gestion rationnelle des ressources pastorales en équilibrant pousse naturelle de la végétation et intensité de pâturage. L'étude porte en effet sur un écosystème sahélien fragile, sa capacité de charge et de régénération. Le recours à la télédétection permet une bonne évaluation des aptitudes pastorales (biomasse herbacée et ligneuse) dans des terroirs parfois surpâturés, ainsi que du degré de dégradation des sols, notamment sur glacis limoneux. Après une étude du milieu, les travaux de photo-interprétation des données sont présentés ainsi que les types de pâturages avec un inventaire floristique des espèces existantes

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Book . 1995
    Data sources: Agritrop
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Book . 1995
      Data sources: Agritrop
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Miras, Claude de;
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Horizon / Pleins tex...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Horizon / Pleins textes
    Other literature type . 1978
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Horizon / Pleins tex...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Horizon / Pleins textes
      Other literature type . 1978
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Oleg A. Drozhzhin; Mikhail A. Vorotyntsev; Salim R. Maduar; Nellie R. Khasanova; +2 Authors

    Abstract Wadsley–Roth phase Li x Nb 9 PO 25 has been studied as a potential candidate for anode material of Li-ion batteries. Its crystal structure, which consists of ReO 3 -type blocks of NbO 6 octahedra connected with PO 4 tetrahedra, provides a good stability and performance during Li + insertion/removal. Li-ion chemical diffusion coefficient ( D chem ) in Li x Nb 9 PO 25 was determined by means of potentiostatic intermittent titration technique and electrochemical impedance spectroscopy. Different data treatments (classical Warburg equation or the model of an electrode system with ohmic potential drop and/or slow kinetics of the interfacial Li + ion transfer across the electrode/electrolyte interface) were used for calculation of D chem of the Li ion inside this material; their applicability is discussed in the article. D chem changes with the Li-ion doping degree, x, in Li x Nb 9 PO 25 and has a sharp minimum near the two-phase region at appr. 1.7 V vs. Li + /Li. These values of D chem in Li x Nb 9 PO 25 (∼10 −9 –10 −11 cm 2 s −1 ) were found to be in average noticeably higher than in the widely studied anode material, Li 4 Ti 5 O 12 .

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Electrochimica Actaarrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Electrochimica Acta
    Article . 2013
    License: Elsevier TDM
    Data sources: Crossref
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    addClaim

    This Research product is the result of merged Research products in OpenAIRE.

    You have already added works in your ORCID record related to the merged Research product.
    21
    citations21
    popularityTop 10%
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Electrochimica Actaarrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Electrochimica Acta
      Article . 2013
      License: Elsevier TDM
      Data sources: Crossref
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      addClaim

      This Research product is the result of merged Research products in OpenAIRE.

      You have already added works in your ORCID record related to the merged Research product.
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: van Chuc Nguyen, ?.; Dandach, A.; Thi Thu Ha Vu, ?.; Fongarland, P.; +1 Authors

    Abstract Tungstated zirconia, ZrW, is reported as an efficient solid acid catalyst in the conversion of cellulose into lactic acid in hydrothermal conditions. The active phase of ZrW is generally ascribed to more or less polymerized WOx domains dispersed on zirconia. In this study, commercial uncalcined and calcined tungstated zirconia were used as catalysts for the conversion of cellulose under hydrothermal conditions at 190 °C. Their activities were also compared with uncalcined zirconium oxyhydroxide, ZrO2-x(OH)2x and calcined zirconia, ZrO2. Contrary to the expected results, it is disclosed that uncalcined ZrW exhibits higher catalytic activity and stability than calcined ZrW. Modifications in the products distribution were observed as glycolic acid formation at the expense of lactic acid formation upon ZrW calcination. Even more surprising, the catalytic activity of W free amorphous zirconium oxyhydroxide ZrO2-x(OH)2x is similar to uncalcined ZrW, with lactic acid as the main product while ZrO2 does not have any catalytic activity. These results suggest that the active phase of these catalysts might combine the couple Zr4+ and OH− species while the role of W species would be of secondary importance.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Molecular Catalysisarrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Molecular Catalysis
    Article . 2019
    License: Elsevier TDM
    Data sources: Crossref
    Hal-Diderot
    Article . 2019
    License: CC BY NC
    Data sources: Hal-Diderot
    addClaim

    This Research product is the result of merged Research products in OpenAIRE.

    You have already added works in your ORCID record related to the merged Research product.
    8
    citations8
    popularityTop 10%
    influenceAverage
    impulseTop 10%
    BIP!Powered by BIP!
    more_vert
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Molecular Catalysisarrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Molecular Catalysis
      Article . 2019
      License: Elsevier TDM
      Data sources: Crossref
      Hal-Diderot
      Article . 2019
      License: CC BY NC
      Data sources: Hal-Diderot
      addClaim

      This Research product is the result of merged Research products in OpenAIRE.

      You have already added works in your ORCID record related to the merged Research product.
  • Authors: Boukhari, Amar;

    Knowledge of the nuclear magnetic moments is of great importance to get a clear understanding of nuclear structure. The magnetic moment is sensitive to the single-particle nature of the valence nucleons. The development of radioactive beam facilities allows nowadays studying nuclear spins and moments of exotic nuclei which are far from the stability line. However, the measurement of magnetic moments of exotic nuclei produced as radioactive beams requires the development of reliable methods. Successful development of such methods would open up the possibility to discover new nuclear structure phenomena. The study outlined in this thesis is formed by two experiments. The first experiment was performed at ALTO facility in Orsay, France. One of the main requirements in order to measure a nuclear magnetic moment is to produce a spin-oriented ensemble. The latter can be produced by suitable reaction mechanism and nuclear spin interaction with the surrounding environment. The degree of the orientation depends on the formation process and reaction mechanism. The aim of this first experiment was investigating the level of nuclear spin orientation in incomplete fusion reaction mechanism. Two reaction channels were studied, the isomeric states in ⁶⁵mNi (I = 9/2⁺, Eₓ = 1017 keV, T₁/₂ = 26 ns), and ⁶⁶mCu (I = 6⁻, Eₓ = 563 keV, T₁/₂= 600 ns) with Time-Dependent Perturbed Angular Distribution (TDPAD) method. The result of the experiment demonstrates the possibility of obtaining spin alignment in incomplete fusion reaction of an order of 20%. This reaction mechanism, with such an important amount of spin alignment has potential near radioactive beam facilities to study the neutron-rich region with inverse kinematics reactions. The second experiment, and the main part of the thesis was performed at HIE-ISOLDE at CERN. This experiment aimed to obtain high precision g-factor information on a short-lived picosecond state. A new Time Differential Recoil-In-Vacuum (TDRIV) method was applied for the first time using post-accelerated radioactive beams. The g-factor measurement was performed for the first-excited state in ²⁸Mg nucleus (Eₓ = 1474(1) keV, T₁/₂ = 1.2(1) ps). Since the lifetime of the state is of the order of picoseconds, its g-factor can be measured only via the spin precession of the nucleus in an extremely strong magnetic field (kT). Such fields can only be produced at the nucleus by hyperfine interactions. In order to obtain a high precision on a g-factor measurement, a TDRIV calibration experiment was performed with a stable ²²Ne beam. This run allowed testing the system under the same conditions as with radioactive²⁸Mg beam. In addition, using the known g-factor of the first-excited state in ²²Ne allows to determine the absolute target-to-degrader distance so that to decrease the uncertainty and obtain a high precision g-factor measurement. The obtained calibration parameters from the ²²Ne data will be used in the determination of g-factor of ²⁸Mg.; La mesure des moments magnétiques nucléaires est d'une grande importance pour bien comprendre la structure nucléaire. Le moment magnétique est sensible à la nature de la particule indépendante. Le développement des faisceaux radioactifs permet aujourd'hui d'étudier les spins nucléaires et les moments de noyaux exotiques éloignés de la ligne de stabilité. Cependant, la mesure des moments magnétiques des noyaux radioactifs nécessite le développement des nouvelles méthodes fiables. Le développement réussi de telles méthodes ouvrirait la possibilité de découvrir de nouveaux phénomènes de structure nucléaire. L'étude présentée dans cette thèse est formée de deux expériences. La première expérience a été réalisée à ALTO à Orsay, en France. L'une des principales exigences pour mesurer un moment magnétique nucléaire est de produire un ensemble avec des spins orientés. Ce dernier peut être produit par un mécanisme de réaction approprié et une interaction de spin nucléaire avec le milieu environnant. Le degré d'orientation dépend du processus de formation et du mécanisme de réaction. Le but de cette première expérience était d’étudier le niveau d’orientation du spin nucléaire dans un mécanisme de réaction de fusion incomplète. Le résultat de l'expérience démontre la possibilité d'obtenir un alignement du spin dans une réaction de fusion incomplète d'un ordre de 20%. Ce mécanisme de réaction, avec une telle quantité d’alignement de spin, a le potentiel d’étudier la région riche en neutrons avec des faisceaux radioactifs. La deuxième expérience, et l'essentiel de la thèse, a été réalisée à HIE-ISOLDE au CERN. Cette expérience visait à obtenir des informations de haute précision sur le facteur g d’un état de courte durée. Une nouvelle méthode TDRIV (Time-Differential Recoil In Vacuum) a été appliquée pour la première fois avec des faisceaux radioactifs post-accélérés. La mesure du facteur g était réalisée pour le premier état excité dans un noyau de ²⁸Mg (Eₓ = 1474 (1) keV, T₁/₂ = 1,2 (1) ps).

    Hal-Diderotarrow_drop_down
    Hal-Diderot
    Doctoral thesis . 2018
    Data sources: Hal-Diderot
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      Hal-Diderotarrow_drop_down
      Hal-Diderot
      Doctoral thesis . 2018
      Data sources: Hal-Diderot
  • Authors: Eychenne, Camille;

    Fonder un projet de territoire à la lumière d'une bonne connaissance de ses composantes paysagères permet d'instaurer une dynamique durable de développement. Le paysage devient support de projet de territoire et outil de développement local.

    Hal-Diderotarrow_drop_down
    Hal-Diderot
    Other literature type . 2016
    Data sources: Hal-Diderot
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      Hal-Diderotarrow_drop_down
      Hal-Diderot
      Other literature type . 2016
      Data sources: Hal-Diderot
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Dieye, Papa Nouhine; Duteurtre, Guillaume; Ba Diao, Maty; Dia, Djiby;
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Part of book or chapter of book . 2010
    Data sources: Agritrop
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Part of book or chapter of book . 2010
      Data sources: Agritrop
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Cécile Mons; Thomas Botzanowski; Anton Nikolaev; Petra Hellwig; +4 Authors

    International audience; Human mitoNEET (mNT) is the first identified Fe−S protein of the mammalian outer mitochondrial membrane. Recently, we demonstrated the involvement of mNT in a specific cytosolic pathway dedicated to the reactivation of oxidatively damaged cytosolic aconitase by cluster transfer. In vitro studies using apo-ferredoxin (FDX) reveal that mNT uses an Fe-based redox switch mechanism to regulate the transfer of its cluster. Using the "gold standard" cluster recipient protein, FDX, we show that this transfer is direct and that only one of the two mNT clusters is transferred when the second one is decomposed. Combining complementary biophysical and biochemical approaches, we show that pH affects both the sensitivity of the cluster to O 2 and dimer stability. Around physiological cytosolic pH, the ability of mNT to transfer its cluster is tightly regulated by the pH. Finally, mNT is extremely resistant to H 2 O 2 compared to ISCU and SufB, two other Fe−S cluster transfer proteins, which is consistent with its involvement in a repair pathway of stress-damaged Fe−S proteins. Taken together, our results suggest that the ability of mNT to transfer its cluster to recipient proteins is not only controlled by the redox state of its cluster but also tightly modulated by the pH of the cytosol. We propose that when pathophysiological conditions such as cancer and neurodegenerative diseases dysregulate cellular pH homeostasis, this pH-dependent regulation of mNT is lost, as is the regulation of cellular pathways under the control of mNT. I ron−sulfur (Fe−S) clusters are evolutionarily ancient and highly conserved prosthetic cofactors. Composed of only iron and sulfur, they are involved in many essential biological processes. 1,2 MitoNEET (mNT), also known as CISD1, is the first identified Fe−S protein of the mammalian outer mitochondrial membrane (OMM). 3,4 This is a small homodimeric protein (13 kDa for each monomer) anchored to the OMM by its 32-amino acid N-terminus with the major part of the protein, including the C-terminal Fe−S binding domain, located in the cytosol. 4 Each monomer accommodates one [2Fe-2S] cluster coordinated by three cysteines (C72, C74, and C83) and one histidine (H87) in a CDGSH domain 5−8 as other members of the NEET protein family, 9 which also includes Miner1 (or CISD2) and Miner2 (or CISD3) in mammals. 10 Although the biological activity of mNT is still debated, 11 studies have shown that it is involved in the regulation of iron/reactive oxygen species homeo-stasis, 12−14 in the regulation of lipid and glucose metabolism , 13,15 and in cell proliferation in breast cancer. 16 In vitro studies revealed that holo-mNT (the form of the protein with the cluster) is able to transfer its Fe−S cluster to very diverse apoprotein (an Fe−S protein, which has lost its cluster) recipients assembling either a [2Fe-2S] cluster as ferredoxin from various organisms, 17,18 human anamorsin 19 and CISD2, 20 or a [4Fe-4S] cluster as mammalian iron regulatory protein-1 (IRP-1)/cytosolic aconitase (c-aconi-tase). 14 On the basis of in cellulo experiments, we showed that mNT is able to repair the oxidatively damaged Fe−S cluster of human IRP-1/c-aconitase by transferring its cluster to the damaged protein. 14 Recently, we started to investigate in depth the in vitro cluster transfer reaction, focusing on the transfer from holo-mNT to [2Fe-2S] recipient protein. We unambiguously demonstrated that oxidized mNT ([2Fe-2S] 2+) triggers cluster transfer, whereas reduction of its cluster abrogates this transfer. Moreover, while O 2 significantly affects the lability of the oxidized mNT cluster, it does not interfere with the cluster

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Biochemistry; Hal-Di...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Biochemistry
    Article . 2018
    Data sources: Crossref
    addClaim

    This Research product is the result of merged Research products in OpenAIRE.

    You have already added works in your ORCID record related to the merged Research product.
    14
    citations14
    popularityTop 10%
    influenceAverage
    impulseTop 10%
    BIP!Powered by BIP!
    more_vert
4,318,720 Research products
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: De Méritens, Patrice; Fitoussi, Jean-Paul;
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ SPIRE - Sciences Po ...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ SPIRE - Sciences Po ...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Cardenas, Daniela E.; Auer, Lucas; Morin, Emmanuelle; Carrillo-Tarazona, Yisel; +6 Authors

    Puccinia kuehnii, the causal agent of orange rust, is a fungal pathogen that induced significant losses to the sugarcane crop in Florida since 2007. During plant infection, rust fungi deliver effector proteins into host tissues to manipulate plant functions and promote parasitic growth. Identiflcation and functional characterization of secreted effectors are essential steps to understand the molecular basis of host-pathogen interactions. Like other biotrophic fungi, Puccinia species possess large repertoires of secreted proteins whose vast majority has no known function.The objective of our investigations is to identify genes encoding secreted proteins, including relevant disease-related candidate effectors that are expressed during sugarcane infection by the orange rust pathogen. In a first experiment, healthy leaves of sugarcane cultivars CPB9-2743 (susceptible to orange rust) and CP96-1252 (resistant) were inoculated with race 2743 of P. kuehnii. In a second experiment, healthy leaves of sugarcane cultivars CL85-1040 (susceptible) and CP96-1,252 (resistant) were inoculated with race 1040 of the pathogen. Total RNA was extracted at 0-72 days after inoculation and transcript expression was quantilified through Illumina RNA-sequencing. Differential gene expression profiling was then determined for the compatible and incompatible interactions using DESeq2. Ongoing work includes characterization of effector proteins differentiating races 1040 and 2743 of P. kuehnii. Our longterm goal is to identify a set of candidate effector proteins for identification of host defense related proteins in marker-assisted breeding of sugarcane.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Article . 2022
    Data sources: Agritrop
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Article . 2022
      Data sources: Agritrop
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Sanon, H.O.; Koné, Nadine; Botoni, Hazin Edwige; Poissonet, Jacques; +2 Authors

    Ce travail met en relief la nécessité d'adopter une gestion rationnelle des ressources pastorales en équilibrant pousse naturelle de la végétation et intensité de pâturage. L'étude porte en effet sur un écosystème sahélien fragile, sa capacité de charge et de régénération. Le recours à la télédétection permet une bonne évaluation des aptitudes pastorales (biomasse herbacée et ligneuse) dans des terroirs parfois surpâturés, ainsi que du degré de dégradation des sols, notamment sur glacis limoneux. Après une étude du milieu, les travaux de photo-interprétation des données sont présentés ainsi que les types de pâturages avec un inventaire floristique des espèces existantes

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Book . 1995
    Data sources: Agritrop
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Book . 1995
      Data sources: Agritrop
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Miras, Claude de;
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Horizon / Pleins tex...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Horizon / Pleins textes
    Other literature type . 1978
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Horizon / Pleins tex...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Horizon / Pleins textes
      Other literature type . 1978
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Oleg A. Drozhzhin; Mikhail A. Vorotyntsev; Salim R. Maduar; Nellie R. Khasanova; +2 Authors

    Abstract Wadsley–Roth phase Li x Nb 9 PO 25 has been studied as a potential candidate for anode material of Li-ion batteries. Its crystal structure, which consists of ReO 3 -type blocks of NbO 6 octahedra connected with PO 4 tetrahedra, provides a good stability and performance during Li + insertion/removal. Li-ion chemical diffusion coefficient ( D chem ) in Li x Nb 9 PO 25 was determined by means of potentiostatic intermittent titration technique and electrochemical impedance spectroscopy. Different data treatments (classical Warburg equation or the model of an electrode system with ohmic potential drop and/or slow kinetics of the interfacial Li + ion transfer across the electrode/electrolyte interface) were used for calculation of D chem of the Li ion inside this material; their applicability is discussed in the article. D chem changes with the Li-ion doping degree, x, in Li x Nb 9 PO 25 and has a sharp minimum near the two-phase region at appr. 1.7 V vs. Li + /Li. These values of D chem in Li x Nb 9 PO 25 (∼10 −9 –10 −11 cm 2 s −1 ) were found to be in average noticeably higher than in the widely studied anode material, Li 4 Ti 5 O 12 .

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Electrochimica Actaarrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Electrochimica Acta
    Article . 2013
    License: Elsevier TDM
    Data sources: Crossref
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    addClaim

    This Research product is the result of merged Research products in OpenAIRE.

    You have already added works in your ORCID record related to the merged Research product.
    21
    citations21
    popularityTop 10%
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Electrochimica Actaarrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Electrochimica Acta
      Article . 2013
      License: Elsevier TDM
      Data sources: Crossref
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      addClaim

      This Research product is the result of merged Research products in OpenAIRE.

      You have already added works in your ORCID record related to the merged Research product.
  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: van Chuc Nguyen, ?.; Dandach, A.; Thi Thu Ha Vu, ?.; Fongarland, P.; +1 Authors

    Abstract Tungstated zirconia, ZrW, is reported as an efficient solid acid catalyst in the conversion of cellulose into lactic acid in hydrothermal conditions. The active phase of ZrW is generally ascribed to more or less polymerized WOx domains dispersed on zirconia. In this study, commercial uncalcined and calcined tungstated zirconia were used as catalysts for the conversion of cellulose under hydrothermal conditions at 190 °C. Their activities were also compared with uncalcined zirconium oxyhydroxide, ZrO2-x(OH)2x and calcined zirconia, ZrO2. Contrary to the expected results, it is disclosed that uncalcined ZrW exhibits higher catalytic activity and stability than calcined ZrW. Modifications in the products distribution were observed as glycolic acid formation at the expense of lactic acid formation upon ZrW calcination. Even more surprising, the catalytic activity of W free amorphous zirconium oxyhydroxide ZrO2-x(OH)2x is similar to uncalcined ZrW, with lactic acid as the main product while ZrO2 does not have any catalytic activity. These results suggest that the active phase of these catalysts might combine the couple Zr4+ and OH− species while the role of W species would be of secondary importance.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Molecular Catalysisarrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Molecular Catalysis
    Article . 2019
    License: Elsevier TDM
    Data sources: Crossref
    Hal-Diderot
    Article . 2019
    License: CC BY NC
    Data sources: Hal-Diderot
    addClaim

    This Research product is the result of merged Research products in OpenAIRE.

    You have already added works in your ORCID record related to the merged Research product.
    8
    citations8
    popularityTop 10%
    influenceAverage
    impulseTop 10%
    BIP!Powered by BIP!
    more_vert
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Molecular Catalysisarrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Molecular Catalysis
      Article . 2019
      License: Elsevier TDM
      Data sources: Crossref
      Hal-Diderot
      Article . 2019
      License: CC BY NC
      Data sources: Hal-Diderot
      addClaim

      This Research product is the result of merged Research products in OpenAIRE.

      You have already added works in your ORCID record related to the merged Research product.
  • Authors: Boukhari, Amar;

    Knowledge of the nuclear magnetic moments is of great importance to get a clear understanding of nuclear structure. The magnetic moment is sensitive to the single-particle nature of the valence nucleons. The development of radioactive beam facilities allows nowadays studying nuclear spins and moments of exotic nuclei which are far from the stability line. However, the measurement of magnetic moments of exotic nuclei produced as radioactive beams requires the development of reliable methods. Successful development of such methods would open up the possibility to discover new nuclear structure phenomena. The study outlined in this thesis is formed by two experiments. The first experiment was performed at ALTO facility in Orsay, France. One of the main requirements in order to measure a nuclear magnetic moment is to produce a spin-oriented ensemble. The latter can be produced by suitable reaction mechanism and nuclear spin interaction with the surrounding environment. The degree of the orientation depends on the formation process and reaction mechanism. The aim of this first experiment was investigating the level of nuclear spin orientation in incomplete fusion reaction mechanism. Two reaction channels were studied, the isomeric states in ⁶⁵mNi (I = 9/2⁺, Eₓ = 1017 keV, T₁/₂ = 26 ns), and ⁶⁶mCu (I = 6⁻, Eₓ = 563 keV, T₁/₂= 600 ns) with Time-Dependent Perturbed Angular Distribution (TDPAD) method. The result of the experiment demonstrates the possibility of obtaining spin alignment in incomplete fusion reaction of an order of 20%. This reaction mechanism, with such an important amount of spin alignment has potential near radioactive beam facilities to study the neutron-rich region with inverse kinematics reactions. The second experiment, and the main part of the thesis was performed at HIE-ISOLDE at CERN. This experiment aimed to obtain high precision g-factor information on a short-lived picosecond state. A new Time Differential Recoil-In-Vacuum (TDRIV) method was applied for the first time using post-accelerated radioactive beams. The g-factor measurement was performed for the first-excited state in ²⁸Mg nucleus (Eₓ = 1474(1) keV, T₁/₂ = 1.2(1) ps). Since the lifetime of the state is of the order of picoseconds, its g-factor can be measured only via the spin precession of the nucleus in an extremely strong magnetic field (kT). Such fields can only be produced at the nucleus by hyperfine interactions. In order to obtain a high precision on a g-factor measurement, a TDRIV calibration experiment was performed with a stable ²²Ne beam. This run allowed testing the system under the same conditions as with radioactive²⁸Mg beam. In addition, using the known g-factor of the first-excited state in ²²Ne allows to determine the absolute target-to-degrader distance so that to decrease the uncertainty and obtain a high precision g-factor measurement. The obtained calibration parameters from the ²²Ne data will be used in the determination of g-factor of ²⁸Mg.; La mesure des moments magnétiques nucléaires est d'une grande importance pour bien comprendre la structure nucléaire. Le moment magnétique est sensible à la nature de la particule indépendante. Le développement des faisceaux radioactifs permet aujourd'hui d'étudier les spins nucléaires et les moments de noyaux exotiques éloignés de la ligne de stabilité. Cependant, la mesure des moments magnétiques des noyaux radioactifs nécessite le développement des nouvelles méthodes fiables. Le développement réussi de telles méthodes ouvrirait la possibilité de découvrir de nouveaux phénomènes de structure nucléaire. L'étude présentée dans cette thèse est formée de deux expériences. La première expérience a été réalisée à ALTO à Orsay, en France. L'une des principales exigences pour mesurer un moment magnétique nucléaire est de produire un ensemble avec des spins orientés. Ce dernier peut être produit par un mécanisme de réaction approprié et une interaction de spin nucléaire avec le milieu environnant. Le degré d'orientation dépend du processus de formation et du mécanisme de réaction. Le but de cette première expérience était d’étudier le niveau d’orientation du spin nucléaire dans un mécanisme de réaction de fusion incomplète. Le résultat de l'expérience démontre la possibilité d'obtenir un alignement du spin dans une réaction de fusion incomplète d'un ordre de 20%. Ce mécanisme de réaction, avec une telle quantité d’alignement de spin, a le potentiel d’étudier la région riche en neutrons avec des faisceaux radioactifs. La deuxième expérience, et l'essentiel de la thèse, a été réalisée à HIE-ISOLDE au CERN. Cette expérience visait à obtenir des informations de haute précision sur le facteur g d’un état de courte durée. Une nouvelle méthode TDRIV (Time-Differential Recoil In Vacuum) a été appliquée pour la première fois avec des faisceaux radioactifs post-accélérés. La mesure du facteur g était réalisée pour le premier état excité dans un noyau de ²⁸Mg (Eₓ = 1474 (1) keV, T₁/₂ = 1,2 (1) ps).

    Hal-Diderotarrow_drop_down
    Hal-Diderot
    Doctoral thesis . 2018
    Data sources: Hal-Diderot
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      Hal-Diderotarrow_drop_down
      Hal-Diderot
      Doctoral thesis . 2018
      Data sources: Hal-Diderot