References of "Collette, Caroline"
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See detailFormation des utilisateurs
Collette, Caroline ULg

Learning material (2011)

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See detailLe coût du libre accès dans le cas du modèle hybride
Collette, Caroline ULg

in Cahiers de la Documentation = Bladen voor Documentatie (2007), 1

L'article présente un nouveau schéma de publication par lequel les éditeurs de revues "traditionnelles" proposent aux auteurs de payer des frais afin que leur article soit directement en accès libre. Dans ... [more ▼]

L'article présente un nouveau schéma de publication par lequel les éditeurs de revues "traditionnelles" proposent aux auteurs de payer des frais afin que leur article soit directement en accès libre. Dans cet article est comparé le coût d'accès à l'information suivant ce modèle par rapport à celui de l'accès par abonnement institutionnel. Les informations utilisées pour réaliser cette estimation sont basées sur des données provenant de l'Université de Liège. [less ▲]

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See detailFormer les étudiants en premier baccalauréat de chimie aux techniques de documentation et communication
Collette, Caroline ULg

in Cahiers de la Documentation = Bladen voor Documentatie (2006), 2

Cet article relate l'expérience vécue lors de l'introduction d'un cours de technique de documentation et de communication au niveau de la première année d'études universitaires en chimie à l'Université de ... [more ▼]

Cet article relate l'expérience vécue lors de l'introduction d'un cours de technique de documentation et de communication au niveau de la première année d'études universitaires en chimie à l'Université de Liège. L'objectif du cours est de mettre en contact les étudiants de première année baccalauréat avec la littérature et les bibliothèques scientifiques. [less ▲]

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See detailUtilisation d’outils documentaires et enseignement des sciences
Collette, Caroline ULg

Learning material (2005)

Training presenting the bibliographical tools and the methods of information retrieval for the teachers in sciences at high school in Belgium.

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See detailQualitative Comparison between the Quantum Calculations and Electrospray Mass Spectra of Complexes of Polyammonium Macrotricyclic Ligands with Dicarboxylic Acids
Collette, Caroline ULg; Dehareng, Dominique ULg; De Pauw, Edwin ULg et al

in Journal of the American Society for Mass Spectrometry (2001), 12(3), 304-16

The host-guest interactions play a very important role in chemical and biological processes. It is therefore important to be able to characterize these complexes. Electrospray mass spectrometry can be ... [more ▼]

The host-guest interactions play a very important role in chemical and biological processes. It is therefore important to be able to characterize these complexes. Electrospray mass spectrometry can be used to characterize the complex formation. It provides information on the mass and the charge of these ionic complexes. In this article, we show that the use of ab initio and semiempirical calculations, in addition to the results obtained by electrospray mass spectrometry, reveal to be a promising tool for the study of these noncovalent complexes. In this article, host-guest complexes formed by macropolycyclic polyammonium host molecules and dicarboxylic acids are studied. [less ▲]

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See detailMechanism of Collisional Heating in Electrospray Mass Spectrometry: Ion Trajectory Calculations
Hoxha, Antuan; Collette, Caroline ULg; De Pauw, Edwin ULg et al

in Journal of Physical Chemistry A (2001), 105

To simulate the multicollisional heating process taking place in the intermediate pressure region of an electrospray source, ion trajectory calculations have been preformed by introducing in the SIMION ... [more ▼]

To simulate the multicollisional heating process taking place in the intermediate pressure region of an electrospray source, ion trajectory calculations have been preformed by introducing in the SIMION program a subroutine for handling the collision dynamics. The simulated internal energy distributions are compared with already available experimental distributions obtained by the "survival ion yield" method. [less ▲]

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See detailDetermination de l'énergie interne des ions produits en spectrométrie de masse à ionisation électrospray
Collette, Caroline ULg

Doctoral thesis (2000)

The internal energy deposited in the ions in the source of a mass spectrometer governs their fragmentation and therefore the content of the spectra, When the ionization conditions are well defined and ... [more ▼]

The internal energy deposited in the ions in the source of a mass spectrometer governs their fragmentation and therefore the content of the spectra, When the ionization conditions are well defined and reproducible, e.g. in electron impact, the elaboration of databases benefits the use of the method. In electrospray, however, the source conditions are not strictly defined. The elaboration of spectra databases therefore requires a calibration of the internal energy of the ions that is valid for all types of spectrometers, A method for the calibration of the internal energy of ions in electrospray is presented, developed using the fragmentation reactions of a set of probe ions (benzylpyridinium salts) under various conditions. The influence of the experimental conditions on the internal energy of the ions permits the calibration of individual working conditions [less ▲]

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See detailThermal Energy Distribution Observed in Electrospray Ionization
Drahos, Laszlo; Heeren, Ron; Collette, Caroline ULg et al

in Journal of Mass Spectrometry [=JMS] (1999), 34

A new method was developped which fits a thermal internal energy distribution to ions formed by electrospray ionization. The molecular ion survival yield was measured and determined by RRKM calculations ... [more ▼]

A new method was developped which fits a thermal internal energy distribution to ions formed by electrospray ionization. The molecular ion survival yield was measured and determined by RRKM calculations as a function of temperature. The "characteristic" temperature was determined when the calculated and measured molecular survival yields were equal. The validity of the method was also checked performing blackbody infrared radiation and on-resonance excitation experiments on a Fourier transform ion cyclotron resonance instrument with benzylpyridine salts and leucine enkephalin. [less ▲]

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See detailCalibration of the Internal Energy Distribution of Ions Produced by Electrospray
Collette, Caroline ULg; De Pauw, Edwin ULg

in Rapid Communications in Mass Spectrometry : RCM (1998), 12

The internal energy deposited in the ions in the source of mass spectrometer governs their fragmentation and therefore the content of the spectra. When the ionization conditions are well defined and ... [more ▼]

The internal energy deposited in the ions in the source of mass spectrometer governs their fragmentation and therefore the content of the spectra. When the ionization conditions are well defined and reproductible, the elaboration of databases benefits the use of the method. In electrospray, however, the source conditions are not strictly defined. The elaboration of spectra databases therefore requires a calibration of internal energy of the ions. In this article, a method for the calibration of the internal energy of the ions in electrospray is presented, developed using fragmentation reactions of a set of probe ions (benzylpyridinium salts) under various conditions. [less ▲]

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See detailComparison of the Internal Energy Distributions of Ions Produced by Different Electrospray Sources
Collette, Caroline ULg; Drahos, Laszlo; De Pauw, Edwin ULg et al

in Rapid Communications in Mass Spectrometry : RCM (1998), 12

The internal energies of the emitted ions can be modulated in an electrospray source through different experimental conditions. However, the fragmentation pattern depends also on conditions that cannot be ... [more ▼]

The internal energies of the emitted ions can be modulated in an electrospray source through different experimental conditions. However, the fragmentation pattern depends also on conditions that cannot be controlled by the operator. These differences make difficult the comparison of the electrospray mass spectra obtained with different mass spectrometers. A method for the calibration of the internal energies of ions produced by an electrospray source has been presented previously to study the influence of experimental conditions on the internal energies of the ions. In this work, new results were obtained with modified values of fragmentation energy taking into account the kinetic shift of thermometer ions. [less ▲]

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See detailElectrospray Mass Spectrometry Study of Selective Complexes of Polyammonium Macrotricyclic Ligands with Dicarboxylic Acids
Collette, Caroline ULg; Meunier, Cécile; De Pauw, Edwin ULg et al

in Rapid Communications in Mass Spectrometry : RCM (1997), 11

Macrocyclic and macropolycyclic polyammonium host molecules have been shown to complex a variety of inorganic and organic anions strongly and selectively. The selectivity of the complexation depends on ... [more ▼]

Macrocyclic and macropolycyclic polyammonium host molecules have been shown to complex a variety of inorganic and organic anions strongly and selectively. The selectivity of the complexation depends on the substrate lenght and on the size of the host cavity of the macrocycle. We describe in this article the analysis of the complexation of dicarboxylic acid substrates by a macrotricyclic host using electrospray mass spectrometry. [less ▲]

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See detailEtude par spectrométrie de masse du comportement de complexes organométalliques lors de l'activation par collision
Collette, Caroline ULg

Master's dissertation (1995)

The study by mass spectrometry with electrospray ionization of organometallic complexes was performed in order to elucidate the mechanism of reduction of ions in the gas phase that occurs in the region of ... [more ▼]

The study by mass spectrometry with electrospray ionization of organometallic complexes was performed in order to elucidate the mechanism of reduction of ions in the gas phase that occurs in the region of the cone of the electrospray source. The prospects of this work are a better understanding of the mechanisms of fragmentation of ions in the gas phase in the area of the source and the opportunity to study the reactions of these complexes in the absence of solvent. [less ▲]

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