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Hubert Girault

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Publications associées (430)

Analysis of major milk whey proteins by immunoaffinity capillary electrophoresis coupled with MALDI-MS

Hubert Girault, Anne-Laure Gassner, Natalia Gasilova

Two major milk whey proteins, β-lactoglobulin and α-lactalbumin, are among the main cowmilk allergens and can cause allergy even at a very low concentrations. Therefore, these proteins are interesting targets in food analysis, not only for food quality con ...

Wiley-Blackwell2012

Hydrogen evolution across nano-Schottky junctions at carbon supported MoS2 catalysts in biphasic liquid systems

Hubert Girault, Marco Cantoni, Xile Hu, Heron Vrubel, Peiyu Ge, Micheal Diarmaid Scanlon, Pekka Eero Peljo

The activities of a series of MoS2-based hydrogen evolution catalysts were studied by biphasic reactions monitored by UV/Vis spectroscopy. Carbon supported MoS2 catalysts performed best due to an abundance of catalytic edge sites and strong electronic coup ...

Royal Society of Chemistry2012

Allergy Diagnostics Using Magnetic Beads in a GRAVI-Cell Microfluidic Device

Hubert Girault, Anne-Laure Gassner, Natalia Gasilova

Schweizerische Chemische Gesellschaft2012

Biphasic water splitting by osmocene

Hubert Girault, Anne-Clémence Corminboeuf, Xile Hu, Manuel Alejandro Méndez Agudelo, Imren Hatay, Heron Vrubel, Peiyu Ge, Astrid Johana Olaya Avendano

The photochemical reactivity of osmocene in a biphasic water-organic solvent system has been investigated to probe its water splitting properties. The photoreduction of aqueous protons to hydrogen under anaerobic conditions induced by osmocene dissolved in ...

National Academy of Sciences2012

Voltammetric studies of hexachromic anion transfer reactions across micro-water/polyvinylchloride-2-nitrophenyloctylether gel interfaces for sensing applications

Valérie Devaud, Hubert Girault

The transfer reactions of various anionic hexavalent chromium species across a polarized water/polyvinylchloride-2-nitrophenyloctylether (PVC-NPOE) interface featuring a 66 microhole array are described for the development of selective and sensitive Cr(VI) ...

Elsevier2012

Improved Conversion Rates in Drug Screening Applications Using Miniaturized Electrochemical Cells with Frit Channels

Hubert Girault, Albert van den Berg, Liang Qiao

This paper reports a novel design of a miniaturized three-electrode electrochemical cell, the purpose of which is aimed at generating drug metabolites with a high conversion efficiency. The working electrode and the counter electrode are placed in two sepa ...

Amer Chemical Soc2012

Total serum IgE quantification by microfluidic ELISA using magnetic beads

Hubert Girault, Anne-Laure Gassner

The present work reports on the quantification of total IgE in human serum using a microanalytical device whose fluidics is driven by gravity and capillary forces only. Thanks to the eight parallel microchannels in each microchip, calibration and sample an ...

Springer Verlag2012

Electrochemical Push–Pull Scanner with Mass Spectrometry Detection

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Liang Qiao, Dmitry Momotenko, Andreas Stephan Lesch

This manuscript presents a push-pull electrochem. scanner able to image reactivity of initially dry surfaces by scanning electrochem. microscopy (SECM) and to probe mols. present or generated at the surface by mass spectrometry (MS). The proof-of-concept i ...

Amer Chemical Soc2012

Study of Amyloid beta-Peptide (A beta 12-28-Cys) Interactions with Congo Red and beta-Sheet Breaker Peptides Using Electrochemical Impedance Spectroscopy

Hubert Girault, Raheleh Partovi Nia

A surface-based approach is presented to study the interactions of A beta 12-28-Cys assembled on gold surfaces with Congo red (CR) and a beta-sheet breaker (BSB) peptide. The various aspects of the peptide film have been examined using different electroche ...

American Chemical Society2012

Ion transfer across the water | trifluorotoluene interface

Hubert Girault, Peiyu Ge, Astrid Johana Olaya Avendano

This work introduces trifluorotoluene as an alternative organic solvent for studying charge transfer across liquid vertical bar liquid interfaces. In comparison with the most popular organic solvents in this field, 1,2-dichloroethane and nitrobenzene, trif ...

Elsevier2012

Interfacial Self-Assembly of Water-Soluble Cationic Porphyrins for the Reduction of Oxygen to Water

Pierre-François Marie Brevet, Hubert Girault, Astrid Johana Olaya Avendano

Meet at the border: Assembly of the water-soluble cobalt tetrakis(N-methylpyridinium-4-yl)porphyrin [CoTMPyP]4+ at soft interfaces is enhanced and stabilized by its interfacial interaction with the lipophilic anion (C6F5)4B−. The supramolecular structure t ...

Wiley-VCH Verlag GmbH2012

Proteolysis in microfluidic droplets: an approach to interface protein separation and peptide mass spectrometry

Hubert Girault, Liang Qiao

A versatile microreactor protocol based on microfluidic droplets has been developed for on-line protein digestion. Proteins separated by liquid chromatography are fractionated in water-in-oil droplets and digested in sequence. The microfluidic reactor acts ...

Royal Society of Chemistry2012

In-Spray Supercharging of Peptides and Proteins in Electrospray Ionization Mass Spectrometry

Hubert Girault, Yury Tsybin, Yu Lu, Luca Fornelli, Sasa Miladinovic, Krzysztof Marek Piech

Enhanced charging, or supercharging, of analytes in electrospray ionization mass spectrometry (ESI MS) facilitates high resolution MS by reducing an ion mass-to-charge (m/z) ratio, increasing tandem mass spectrometry (MS/MS) efficiency. ESI MS superchargin ...

2012

Oxygen and hydrogen peroxide reduction by 1,2-diferrocenylethane at a liquid/liquid interface

Hubert Girault, Fernando Cortes Salazar, Peiyu Ge, Haiqiang Deng, Pekka Eero Peljo

Molecular oxygen and hydrogen peroxide reduction by 1,2-diferrocenylethane (DFcE) was investigated at a polarized water/1,2-dichloroethane (W/DCE) interface. The overall reaction points to a proton-coupled electron transfer (PCET) mechanism, where the firs ...

Elsevier2012

Segmented Field OFFGEL® Electrophoresis

Hubert Girault, Julien Maillard, Fernando Cortes Salazar, Dmitry Momotenko, Elena Tobolkina

A multielectrode setup for protein OFFGEL electrophoresis that significantly improves protein separation efficiency has been developed. Here, the electric field is applied by segments between seven electrodes connected in series to six independent power su ...

Wiley-Blackwell2012

Scan-Rate-Dependent Ion Current Rectification and Rectification Inversion in Charged Conical Nanopores

Hubert Girault, Dmitry Momotenko

Herein we report a theoretical study of diode-like behavior of negatively charged (e.g., glass or silica) nanopores at different potential scan rates (1-1000 V center dot s(-1)). Finite element simulations were used to determine current-voltage characteris ...

2011

Melittin Adsorption and Lipid Monolayer Disruption at Liquid-Liquid Interfaces

Hubert Girault, Manuel Alejandro Méndez Agudelo, Yu Lu, Zahra Nazemi

Melittin, a membrane-active peptide with antimicrobial activity, was investigated at the interface formed between two immiscible electrolyte solutions (ITIES) supported on a metallic electrode. Ion-transfer voltammetry showed well-defined semi-reversible t ...

American Chemical Society2011

Phosphorylation of alpha-Synuclein at Y125 and S129 Alters Its Metal Binding Properties: Implications for Understanding the Role of alpha-Synuclein in the Pathogenesis of Parkinson's Disease and Related Disorders

Hubert Girault, Michel Prudent, Bruno Claude Daniel Fauvet, Hilal Lashuel, Yu Lu

alpha-Synuclein (alpha-syn) is a 140-amino acid protein that plays a central role in the pathogenesis of Parkinson's disease (PD) and other synucleinopathies. However, the molecular determinants that are responsible for triggering and/or propagating alpha- ...

American Chemical Society2011

Surface second harmonic generation from coumarin 343 dye-attached TiO2 nanoparticles at liquid-liquid interface

Hubert Girault

The nonlinear optical properties of coumarin 343 (C343) dye-attached TiO2 nanoparticles in the size range 5-8 nm adsorbed at the interface of water/1,2-dichloroethane have been studied by using the surface second harmonic generation technique. No second ha ...

Springer Verlag2011

Interfacial Complexation Reactions of Sr2+ with Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine Oxide for Understanding Its Extraction in Reprocessing Spent Nuclear Fuels

Hubert Girault, Zhifeng Ding, Yu Lu, Thomas James Stockmann

The complexation reactions between strontium (Sr2+) and octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) were studied at the aqueous vertical bar 1,2-dichloroethane (w vertical bar DCE) and aqueous vertical bar room-temperature ionic liqui ...

2011

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