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Christophe Roussel

Cette personne a quitté l’EPFL

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Publications associées (34)

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Reactivity Of Arylnitrile Oxides And C-Aroyl-N-Phenylnitrones With 3-Methylenedihydro-(3H)-Furan-2-One And Itaconic Anhydride

Christophe Roussel

1,3-dipolar cycloaddition is a powerful route for the synthesis of five-membered heterocycles. The [3+2] cycloadditions of some alpha-methylene-gamma-buryrolactones, namely 3-methylenedihydro-(3H)-furan-2-one (1) and itaconic anhydride (2) were Studied. Th ...

2009

Method for the preparation of a sample comprising highly polarized nuclear spins and uses and devices for such a method

Jean-Philippe Ansermet, Christophe Roussel, Jonas Milani, Mika Antero Tamski

Method for the preparation of a sample comprising highly polarized nuclear spins, comprising at least the following steps: a) bringing a polarization system, which using an electrochemical reaction can be converted into an EPR-active radical form thereof, ...

2021

Specific On-Plate Enrichment of Phosphorylated Peptides for Direct MALDI-TOF MS Analysis

Hubert Girault, Liang Qiao, Christophe Roussel

An on-plate specific enrichment method is presented for the direct analysis of peptides phosphorylation. An array of sintered TiO2 nanoparticle spots was prepared on a stainless steel plate to provide porous substrate with a very large specific surface and ...

American Chemical Society2007

RF-plasma pretreatment of surfaces leading to TiO2 coatings with improved optical absorption and OH-radical production (vol 130, pg 65, 2013)

César Pulgarin, Juan Kiwi, Sami Rtimi, Christophe Roussel

Elsevier2013

Method for the generation of radicals for dynamic nuclear polarization and uses thereof for nmr, mrs and mri

Arnaud Comment, Christophe Roussel, Tim Rolf Eichhorn

A method for the preparation of a sample comprising highly polarized nuclear spins is proposed, comprising at least the following steps: a) provision of molecules with 1,2-dione structural units and/or molecules with 2,5-diene-1,4-dione structural units in ...

2016

Stabilization of p-GaAs electrode surfaces in organic solvent by bi-phenyl rings for spin dependent electron transfer studies

Jean-Philippe Ansermet, Christophe Roussel, Mika Antero Tamski

Biphenyl-4-thiol (B4t) functionalised p-GaAs photocathodes were compared to non-functionalised p-GaAs ones in the presence of methyl viologen cation radical (MV+•) as a redox mediator. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS ...

2020

Size-Selective Separation of Gold Nanoparticles using Isoelectric Focusing Electrophoresis (IEF)

Hubert Girault, Christophe Roussel, Jean-Pierre Abid

Isoelectric focusing in a polyacrylamide pH gradient gel is used to analyze the size distribution of gold nanoparticles synthesized by a chemical route with mercaptosuccinic acid as a ligand. The isoelectric point of the nanoparticles is shown to be size d ...

Royal Society of Chemistry2005

Photoinduced Nonpersistent Radicals as Polarizing Agents for X-Nuclei Dissolution Dynamic Nuclear Polarization

Arnaud Comment, Giovanni Boero, Tian Cheng, Christophe Roussel, Andrea Capozzi, Jean-Noël Hyacinthe, Jacques Van Der Klink, Tim Rolf Eichhorn

Hyperpolarization via dissolution dynamic nuclear polarization (DNP) is a versatile method to dramatically enhance the liquid-state NMR signal of X-nuclei and can be used for performing metabolic and molecular imaging. It was recently demonstrated that ins ...

American Chemical Society2015

Quantification of THC in Cannabis plants by fast-HPLC-DAD: A promising method for routine analyses

Christophe Roussel

Nowadays, Gas Chromatography Mass Spectrometry (GC-MS) is mainly used in forensic sciences but suffers from limitations when the analysed compounds are thermally instable as it is the case for THC-A (Tetrahydrocannabinolic Acid) which is converted into Del ...

ELSEVIER SCIENCE BV2019

Standard addition strip for quantitative electrostatic spray ionization mass spectrometry analysis: Determination of caffeine in drinks

Hubert Girault, Liang Qiao, Christophe Roussel, Elena Tobolkina

Standard addition strips were prepared for the quantitative determination of caffeine in different beverages by electrostatic spray ionisation mass spectrometry (ESTASI-MS). The gist of this approach is to dry spots of caffeine solutions with different con ...

Elsevier2014

Electrochemical generation of Cu(I) complexes in aqueous solutions studied by on-line mass spectrometry

Hubert Girault, Christophe Roussel, Michel Prudent

Taking advantage of the electrochemical aspects of electrospray ionization (ESI) sources in positive ionization mode mass spectrometry (MS), aqueous copper complexes are electrogenerated using sacrificial copper electrodes. When using 8-hydroxyquinoline or ...

Elsevier2007

Optimal Glass-Forming Solvent Brings Sublimation Dynamic Nuclear Polarization to 129Xe Hyperpolarization Biomedical Imaging Standards

Arnaud Comment, Christophe Roussel, Andrea Capozzi, Jean-Noël Hyacinthe

In addition to the dedicated spin exchange optical pumping (SEOP) technique, an alternative method to produce hyperpolarized xenon gas using dynamic nuclear polarization (DNP) followed by a sublimation procedure was proposed. The challenge associated with ...

American Chemical Society2015

Antioxidant Sensors Based on DNA-Modified Electrodes

Hubert Girault, Christophe Roussel

TiO2/ITO modified electrodes were developed to quantitatively photooxidize adsorbed ds-DNA and to study the effect of antioxidants as ds-DNA protecting agents. TiO2 films are used for efficient ds-DNA immobilization, for ds- DNA oxidation through photogene ...

2005

Hyperpolarization of 129Xe by sublimation DNP using photo-activated radical precursors

Arnaud Comment, François Lazeyras, Najat Salameh, Christophe Roussel, Andrea Capozzi, Jean-Noël Hyacinthe, Tim Rolf Eichhorn

2013