Recursos de colección

ORBi Open Repository and Bibliography (301.662 recursos)

In may 2007, the ULg's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (Board's decision). This decision led to the official launch, in November 2008, of the ORBi platform including both the Academic Bibliography and the Institutional Repository of the Wallonia-Europe University Academy.

Physical, chemical, mathematical & earth Sciences => Chemistry

Mostrando recursos 1 - 20 de 122

  1. Rapid protein structure determination using experimental NMR data

    Wanko Nembot, Alexis Marius
    The knowledge of the tridimensional structure of a protein is essential to design drugs, to predict protein function and to study mechanism of protein function. 3D structure can be determined using two experimental techniques: X-Ray and NMR. However, these techniques have limitations: they are time consuming, manually intensive and sometime technically difficult. Due to these limitations, different approaches that combine the strength of computer and sparse experimental NMR data such as backbone chemical shifts, NOEs distances and residual dipolar couplings have been proposed for the determination of 3D protein structure. Among these experimental NMR data, backbone chemical shifts are the...

  2. Towards a development of iron phosphate-based materials as positive and negative electrodes for Li-ion batteries

    Karegeya, Claude
    The design, synthesis and electrochemical characterization of new electrode materials hold the key for fundamental advances in energy conversion and storage technologies. Polyanionic compounds have been heavily investigated as possible electrode materials in lithium- and sodium-ion cells. This thesis focused on the design, synthesis, size and morphology tailoring of iron phosphate based electrode materials in order to enhance their electrochemical properties. Four iron phosphate-based electrode materials classified in three groups: Na2Mn1.5Fe1.5(PO4)3, NaxMxFe(3-X)(PO4)3 (X=1.25 when M=Ni and x=1.5 for M= Mn) and Fe1.19(PO4)(OH)0.57(H2O)0.43, were investigated in this work. All these compounds were obtained through wet chemical (hydrothermal or solvothermal) synthesis routes....

  3. Comparison of rapid protein structure determination approaches driven by experimental NMR data

    Wanko Nembot, Alexis Marius
    The knowledge of the tridimensional structure of a protein is essential to design drugs, to predict protein function and to study mechanism of protein function. 3D structure can be determined using two experimental techniques: X-Ray and NMR. However, these techniques have limitations: they are time consuming, manually intensive and sometime technically difficult. Due to these limitations, different approaches that combine the strength of computer and sparse experimental NMR data have been proposed to determine rapidly 3D protein structure. Thus different approaches that use sparse NMR experimental NMR data such as backbone chemical shifts, incomplete sets of NOEs distances and residual...

  4. ‘Quality by Design’ approach for the analysis of impurities in pharmaceutical drug products and drug substances

    Dispas, Amandine; Avohou, Tonakpon Hermane; Lebrun, Pierre; Hubert, Philippe; Hubert, Cédric
    Peer reviewed

  5. Enhanced stabilization of water-scCO2 interface by block-like spontaneous gradient copolymers

    Liu, Xuan; Wang, Mingxi; Harrisson, Simon; Debuigne, Antoine; Marty, Jean-Daniel; Destarac, Mathias
    Peer reviewed

  6. Tetrabutyl ammonium salts: cheap catalysts for the facile and selective synthesis of a-alkylidene cyclic carbonates from CO2 and alkynol

    Méreau, Raphaël; Grignard, Bruno; Boyaval, Amélie; Detrembleur, Christophe; Jérôme, Christine; Tassaing, Thierry
    Peer reviewed

  7. Unique alternating peptide-peptoid copolymers from dipeptides via Ugi reaction in water

    Al Samad, Assala; De Winter, Julien; Gergaux, Pascal; Jérôme, Christine; Debuigne, Antoine
    Peer reviewed

  8. Intramolecular Continuous-Flow Strategy Towards Methylphenidate (Ritalin) Hydrochloride

    Gerardy, Romaric; Winter, Marc; Vizza, Alessandra; Monbaliu, Jean-Christophe
    Peer reviewed

  9. Intramolecular continuous-flow strategy towards methylphenidate (Ritalin) hydrochloride

    Gerardy, Romaric; Winter, Marc; Vizza, Alessandra; Monbaliu, Jean-Christophe
    Peer reviewed

  10. Continuous-flow preparation of γ-butyrolactone scaffolds from renewable fumaric and itaconic acids under photosensitized conditions

    Gerardy, Romaric; Winter, Marc; Horn, Clemens R.; Vizza, Alessandra; Van Hecke, Kristof; Monbaliu, Jean-Christophe

  11. Bio-chemical Raman imaging using targeted-SERS

    Verdin, Alexandre; Malherbe, Cédric; Eppe, Gauthier; Gilbert, Bernard
    Raman and SERS spectral imaging, which consists in reconstructing a Raman intensity profile over a 2D or 3D section of a given sample (in presence or not of a nanosubstrate), allow to visualise the variation of the chemical composition associated with the micro-structure of the sample. In particular, targeted-SERS imaging also enables the specific imaging of various macromolecules targeted by SERS probes in complex biological samples such as cancerous cells. To illustrate the versatility of Raman imaging, we describe two applications that were investigated recently in our laboratory. First, 3D Raman imaging was used to investigate a microcavity in a...

  12. A SPRAY DRYING METHOD FOR THE PREPARATION OF Na2FePO4F/CB AND Na2FePO4F/CNT COMPOSITES CATHODE FOR LITHIUM-ION BATTERIES

    Mahmoud, Abdelfattah; Berardo, Loris; Brisbois, Magali; Caes, sebastien; Schrijnemakers, Audrey; Hermann, Raphaël; Cloots, Rudi; Vertruyen, Bénédicte; Boschini, Frédéric
    Fluorophosphates are considered among the most interesting series of cathode material for Li/Na-ion batteries1. Na2FePO4F (space group Pbcn), with its layered structure and two-dimensional pathways for facile Na+/Li+ transport, exhibits minimal structural changes upon reduction/oxidation. The average working voltage is 3.3 V vs. Li/Li+. Intercalation/deintercalation results in a volume change of only 3.7%. However, one of the key drawbacks of Na2FePO4F electrodes is their low intrinsic electronic conductivity. In order to study the effect of the carbon black and carbon nanotubes on the electrochemical performance of Na2FePO4F cathode material for lithium-ion batteries, Na2FePO4F, Na2FePO4F/CB and Na2FePO4F/CNT were prepared by a spray-drying...

  13. Single-Molecule Force Spectroscopy on helical Foldamers

    Devaux, Floriane
    Peer reviewed

  14. Assesment of antioxidant potential of phenolic compounds fractions of Algerian Ceratonia siliqua L. pods during ripening stages

    Ydjedd, Siham; Chaala, Makhlouf; Richard, Gaetan; Kati, Djamel Edine; López-Nicolás, R.; Fauconnier, Marie-Laure; Louaileche, H.
    Peer reviewed

  15. Comprehensive Ion Mobility Calibration: Poly(ethylene oxide) Polymer Calibrants and General Strategies

    Haler, Jean; Kune, Christopher; Massonnet, Philippe; Comby-Zerbino, Clothilde; Jordens, Jan; Honing, Maarten; Mengerink, Ynze; Far, Johann; De Pauw, Edwin
    Peer reviewed

  16. Guidance Document on the Estimation of LOD and LOQ for Measurements in the Field of Contaminants in Food and Feed

    Wenzl, Thomas; Haedrich, Johannes; Schaechtele, Alexander; Piotr, Robouch; Stroka, Joerg; Eppe, Gauthier; Scholl, Georges
    The European Union Reference Laboratory (EURL) for Polycyclic Aromatic Hydrocarbons (EURL PAH), the EURL for Heavy Metals in Feed and Food (EURL HM), the EURL for Mycotoxins (EURL Mycotoxins), and EURL for Dioxins and PCBs in Feed and Food aim to provide with this document guidance to official food control in the EU on the estimation of the limit of quantification of analytical methods for the determination of individual substances in the field of contaminants in feed and food. The document focusses on estimation of the limit of detection (LOD) and/or limit of quantification (LOQ) of polycyclic aromatic hydrocarbons (PAHs), heavy metals (HM), mycotoxins, and polychlorinated dibenzo-p-dioxins (PCDDs),...

  17. The Synthesis and Evaluation of [18F]BPAM121: Potential of an AMPA Receptor Positive Allosteric Modulator

    Manos-Turvey, Alexandra
    AMPA receptors (AMPARs), one of three sub-groups of ionotropic glutamate receptors present in the central nervous system, are recognised for their involvement in long-term potentiation (LTP), and learning and memory processes.1 They represent a valid cognitive enhancer target, particularly in the fight against Alzheimer’s disease (AD).2,3 Benzothiadiazine 1,1-dioxides, such as BPAM121, have emerged as important allosteric modulators of AMPARs, working solely in the presence of the endogenous transmitter.4 Synthesis of BPAM121 labelled with fluorine-18 was proposed, to investigate the utility of this molecule as a PET probe in vivo, and evaluate its potential as an AD diagnostic tool (Figure 1)....

  18. Characterization of metallic trace elements in soils by portable X-ray fluorescence spectrometry

    Rosière, Clément; Godin, Bruno; Liénard, Amandine; Colinet, Gilles
    Peer reviewed

  19. Improved process of ultrasonic spray pyrolysis deposition of one or more electrochromic and/or electrolytic films on a substrate

    Cloots, Rudi; Henrist, Catherine; Denayer, Jessica; Maho, Anthony; Cambier, Francis; Lardot, Véronique; Bister, Geoffroy; Aubry, Philippe

  20. Ultrasonic spray deposition of electrochromic oxide films

    Maho, Anthony; Manceriu, Laura; Colson, Pierre; Henrist, Catherine; Vertruyen, Bénédicte; Cloots, Rudi
    Peer reviewed

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