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See detailImpacts of vegetation changes on LGM climate
Henrot, Alexandra ULg; François, Louis ULg; Munhoven, Guy ULg

Conference (2007, March 12)

The impacts of vegetation change on the climate at the Last Glacial Maximum are investigated with the Earth System Model of Intermediate Complexity Planet Simulator and the dynamic vegetation model Caraib ... [more ▼]

The impacts of vegetation change on the climate at the Last Glacial Maximum are investigated with the Earth System Model of Intermediate Complexity Planet Simulator and the dynamic vegetation model Caraib (CARbon Assimilation in the Biosphere). [less ▲]

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See detailThe fringes of psychosis proneness: unfolding the domains of risk
Laroi, Frank ULg

Conference (2007, March 10)

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See detailLe regard des intervenants et l'éventail des parents
Absil, Gaëtan ULg; Denis, Marie-Elise

Conference (2007, March)

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See detailRigid body attitude synchronization: a consensus approach
Sarlette, Alain ULg; Sepulchre, Rodolphe ULg; Leonard, Naomi

Conference (2007, March)

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See detailLa langue et le réel. Réflexions sur la motivation iconique
Polis, Stéphane ULg

Conference (2007, February 28)

Detailed reference viewed: 9 (0 ULg)
See detailWhen Mass Spectrometry meets Spectroscopy: A Different Perspective on Ion Photodissociation
Gabelica, Valérie ULg

Conference (2007, February 27)

Photodissociation methods are more and more widely used in analytical mass spectrometry as an alternative to collision-induced dissociation. A well known example is infrared multiphoton dissociation ... [more ▼]

Photodissociation methods are more and more widely used in analytical mass spectrometry as an alternative to collision-induced dissociation. A well known example is infrared multiphoton dissociation (IRMPD) with CO2 lasers (wavelength 10.6 µm), which is often preferred to SORI-CID in FTICR mass spectrometers. IR photons are absorbed by the vibrational modes of the ion, and this vibrational energy is redistributed all over the molecule. The fragmentation channels observed are usually the same as for CID. Recently, new possibilities offered by UV lasers of fixed wavelength (i.e. 157 nm or 193 nm) for peptide fragmentation were described. On the contrary to IRMPD, irradiation at these UV wavelengths gives rise to fragmentation channels which are unprecedented in CID, suggesting that photochemical reactions take place. The prerequisite for ion photodissociation is photon absorption. In the infrared, photon absorption results in the excitation of vibrational modes. Anharmonic coupling of the excited vibrational modes with other vibrational modes of the ion results in a rapid intramolecular vibrational energy redistribution (IVR). The energy of an IR photon is too low for the ion to dissociate (0.117 eV/photon for a 10.6 µm CO2 laser). Multiple cycles of absorption and IVR are necessary for IR photodissociation to occur (hence the term multiphoton). Because the first step in photodissociation is photon absorption, the recording of the photodissociation yield as a function of the photon wavenumber gives information on the vibrational modes of the ion. This is the basic principle of infrared spectroscopy experiments inside the mass spectrometer. This technique will be illustrated by a recent example on DNA single strands and quadruplex structures. The shifting of the vibrational frequencies corresponding to guanine C=O stretch gives information on the base pairing in the DNA ion in the gas phase. The situation is somewhat different with UV photons, which may lead to either electronic excitation of the ions or direct electron ejection. Electronic excited states may evolve in different ways: (1) Internal conversion to a vibrationally excited electronic ground state. Resulting fragments would then be similar to CID and IRMPD. This process can be multiphotonic and could be coined UVMPD. (2) Electron autodetachment, leading to the formation of radicals that can be further fragmented to obtain ECD-like or EDD-like fragments. (3) Photochemical reactions giving rise to unprecedented fragmentation channels. In all three cases, product ion yield is conditioned by photon absorption by an electronic state, meaning that UV spectroscopy of gas-phase ions can be performed with a mass spectrometer. We recently explored the effects of photon absorption on multiply charged DNA anions. Depending on the photon wavelength and on the chromophores, all three situations could be observed. Electron photodetachment is the major channel observed when using wavelengths corresponding to DNA base absorption.1,2 When irradiated at proper wavelength, chromophoric DNA ligands also give rise to electron photodetachment. UV-visible spectra of the DNA duplexes and complexes were recorded and compared with solution-phase spectra. Finally, a porphyrin ligand gives rise to specific fragmentation pathways when irradiated at 450 nm, while photodetachment is observed at 260 nm. The most recent results will be presented and discussed. 1. Gabelica, V.; Tabarin, T.; Antoine, R.; Rosu, F.; Compagnon, I.; Broyer, M.; De Pauw, E.; Dugourd, P. Electron Photodetachment Dissociation of DNA Polyanions in a Quadrupole Ion Trap Mass Spectrometer. Anal. Chem. 2006, 78 (18), 6564. 2. Gabelica, V.; Rosu, F.; Tabarin, T.; Kinet, C.; Antoine, R.; Broyer, M.; De Pauw, E.; Dugourd, P. Base-Dependent Electron Photodetachment from Negatively Charged DNA Strands upon 260-nm Laser Irradiation. J. Am. Chem. Soc. 2007, accepted for publication. [less ▲]

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See detailSecondary dispersal by dung beetles of seeds primarily dispersed by tamarins
Culot, Laurence ULg

Conference (2007, February 22)

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See detailImpact des mesures judiciaires alternatives pour les consommateurs de drogues
Fincoeur, Bertrand ULg

Conference (2007, February 21)

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See detailInternational Foundation for Research in Paraplegia
Martin, Didier ULg

Conference (2007, February 20)

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See detailL'emprunt linguistique comme marqueur de vitalité des langues
Baiwir, Esther ULg

Conference (2007, February 09)

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See detail"Ethno-évaluation" : le savoir des acteurs comme théorie de l'action
Absil, Gaëtan ULg

Conference (2007, February)

Detailed reference viewed: 55 (29 ULg)
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See detail3D image analysis characterization of dried banana
Léonard, Angélique ULg; Devahastin, Sakamon; Blacher, Silvia ULg

Conference (2007, February)

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See detailTransfert d'image et hybridation post-traumatique
Hamers, Jérémy ULg

Conference (2007, February)

Detailed reference viewed: 7 (0 ULg)
See detailSuivi diachronique de l’analyse de corpus partagés
Bénel, Aurélien; Lejeune, Christophe ULg

Conference (2007, January 26)

Les anthropologues des sciences ont développé un mode d'inscription permettant le suivi de l'innovation qu'ils appellent "graphe socio-technique". Cette contribution présente les tentatives d'application ... [more ▼]

Les anthropologues des sciences ont développé un mode d'inscription permettant le suivi de l'innovation qu'ils appellent "graphe socio-technique". Cette contribution présente les tentatives d'application de ce dispositif de visualisation au suivi de l'activité sur des plateformes informatiques. Elle soulève des difficultés à la fois techniques et méthodologiques. [less ▲]

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See detailLa pression intracrânienne normale et pathologique
Martin, Didier ULg

Conference (2007, January 22)

Detailed reference viewed: 7 (2 ULg)
See detailLe néokantisme comme forme symbolique ? Merleau-Ponty et Panofsky
Cormann, Grégory ULg

Conference (2007, January 17)

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See detailLes insultes de la cour de récréation
Meunier, Deborah ULg

Conference (2007, January 12)

Detailed reference viewed: 17 (1 ULg)
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See detailParturition Induction in the mare. Why and when? Case Report
Ponthier, Jérôme ULg; Salciccia, Alexandra ULg; Sandersen, Charlotte ULg et al

Conference (2007, January)

INTRODUCTION Some conditions require induction of parturition: colic, severe hyperlipemia, prepubian tendon rupture, premature placental separation, hydroallantoïd, and foetal distress2,4,5. Prolonged ... [more ▼]

INTRODUCTION Some conditions require induction of parturition: colic, severe hyperlipemia, prepubian tendon rupture, premature placental separation, hydroallantoïd, and foetal distress2,4,5. Prolonged gestation is not a good indication1,4. Protocols using oxytocin, prostaglandins or corticosteroids can induce parturition2,3,4,5. Most induction protocols use low doses of oxytocin2,3,5. OBJECTIVE On the basis of a clinical case, this poster will discuss the indications, the methods and the risks of parturition induction in the mare. CLINICAL CASE A pony mare at day 310 of pregnancy is presented for colic with poor prognosis. The foetal parameters are good and the cervix begins to open. There is no milk in the udder. The decision to save the foal is taken and parturition is induced by one oxytocin bolus (20 I.U./IV) followed by an oxytocin infusion (100 I.U. in 1000ml saline). After assisted foaling, the foal rises and sucks commercial colostrum within 30 minutes. Soon, the foal becomes depressed and, despite treatment with commercial plasma, tube feeding and antibiotics, dies at day 2. DISCUSSION This case required immediate induction of foaling, which was achieved by administration of high doses of oxytocin. Commonly, high doses of oxytocin induce dystocia because the foal has no time to move to correct (dorso-sacral) presentation1,2,5. The risks for the foal include absence of colostrum and foetal immaturity1,2,3,4,5. Even after day 300, the prognosis is poor1,2,3,4. A good prognostic indicator of the foal’s maturity (lung, and other systems) is the electrolytes concentration in the mother’s milk2,4. These protocols should be used when foetal maturity is ascertained or as last resort1,2,3,4. CONCLUSIONS Foaling induction is risky for dystocia and foal outcome. It should be reserved to cases where foal’s maturity can be assessed. [less ▲]

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See detailAbstract numeration systems and recognizability
Charlier, Emilie ULg

Conference (2007, January)

In this talk, I will present some results concerning multiplication by a constant in an abstract numeration system built on a bounded language. More precisely, we will show that this operation does not ... [more ▼]

In this talk, I will present some results concerning multiplication by a constant in an abstract numeration system built on a bounded language. More precisely, we will show that this operation does not preserve regularity, and therefore cannot be computed by a finite automaton. [less ▲]

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See detailMonitoring an odour in the environment with an electronic nose : requirements for the signal processing
Romain, Anne-Claude ULg; Delva, Julien ULg; Nicolas, Jacques ULg

Conference (2007, January)

Artificial olfaction system (the so-called electronic nose) is a very promising tool to monitor the malodour in the field. Usual measurement techniques of odour use human olfaction or conventional ... [more ▼]

Artificial olfaction system (the so-called electronic nose) is a very promising tool to monitor the malodour in the field. Usual measurement techniques of odour use human olfaction or conventional analytical techniques. The first category represents the real odour perception but is not applicable to measure continuously bad odours in the field. The second class of techniques gives the mixture composition but not the global information representative of the odour perception. The e-nose has the potentialities to combine "the odour perception" and the "monitoring in the field". However to be able to reach that goal, the signal processing has to be adapted to work in complex environment. The research group in Arlon has more than ten years experience in the measure of environmental malodours in the field. The paper presents the minimal requirements that the group considers as essential for artificial olfaction system to become successful for this application. [less ▲]

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See detailCutting planes from lattice-point-free polyhedra
Louveaux, Quentin ULg

Conference (2007, January)

In this talk, we generalize the concept of a split (that leads to split cuts) to any lattice-point-free polyhedron. We show how we can generate cutting planes for a polyhedron from these objects ... [more ▼]

In this talk, we generalize the concept of a split (that leads to split cuts) to any lattice-point-free polyhedron. We show how we can generate cutting planes for a polyhedron from these objects. Associated to any lattice-point-free polyhedron, we define a "split-dimension" (which is equal to 1 in the case of a split in the usual sense). We then consider the operation of adding to a polyhedron all cutting planes that we can obtain from considering all the lattice-point-free polyhedra with a split-dimension lower or equal to d. We call the obtained object the "d-dimensional split closure" of the initial polyhedron. We discuss whether this object is again a polyhedron or not. As an important illustration, we focus on objects of split-dimension equal to 1 or 2. [less ▲]

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See detailWhat about concrete in the next thirty years ?
Courard, Luc ULg

Conference (2007)

Detailed reference viewed: 6 (0 ULg)
See detailThe metabolome of developing pea seeds
Vigeolas, Hélène ULg

Conference (2007)

Detailed reference viewed: 5 (1 ULg)
See detailEvaluation of Analytical Method Transfer on a Risk Based Methodology using Total Error
Rozet, Eric ULg; Dewe, W.; Govaerts, B. et al

Conference (2007)

Detailed reference viewed: 27 (8 ULg)
See detailY a-t-il un discours universitaire dans la salle (de cours)?
Defays, Jean-Marc ULg

Conference (2007)

Detailed reference viewed: 18 (2 ULg)
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See detailHmty-km and the egyptian bronzes polychromy:A study of the Egyptian collection of the Louvre museum
Mathis, François ULg; Delange, Elisabeth; Robcis, Dominique et al

Conference (2007)

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See detailThe development of extended type noun uses : a comparison between English sort/kind and French sorte/espèce
Brems, Lieselotte ULg; Willemse, Peter; Davidse, Kristin

Conference (2007)

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See detailAssimilation of High-Frequency Radar Currents in a Nested Model of the West Florida Shelf
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Weisberg, R. H.

Conference (2007)

High-frequency radar currents are assimilated in a West Florida Shelf (WFS) model based on the Regional Ocean Model System (ROMS), which is nested in the Atlantic Hybrid Coordinate Ocean Model (HYCOM) for ... [more ▼]

High-frequency radar currents are assimilated in a West Florida Shelf (WFS) model based on the Regional Ocean Model System (ROMS), which is nested in the Atlantic Hybrid Coordinate Ocean Model (HYCOM) for the purpose of including both local and deep-ocean forcing, particularly the Gulf of Mexico Loop Current. Tides are not included in this model. An ensemble simulation of the WFS model is carried out under different wind-forcings in order to estimate the error covariance of the model state vector and the covariance between ocean currents and winds. Radial currents measured by high-frequency radar antennas near Saint Petersburg and Venice, Florida, USA, are assimilated using this ensemble-based error covariance. Different assimilation techniques using a time-average ensemble, a filter to reduce surface-gravity waves and an extended state vector including wind stress were tested. Results of the WFS model assimilating surface currents show an improvement of the model currents not only at the surface but also at depth. [less ▲]

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See detailPhysiopathologie des troubles psychosomatiques du nourrisson
Battisti, Oreste ULg

Conference (2007)

Une mère rencontre son enfant, les intervenants se rencontrent. Les aspects suivants sont abordés: la santé pré et post-natale; évaluation des défaillanes précoces; les besoins des services judiciaires ... [more ▼]

Une mère rencontre son enfant, les intervenants se rencontrent. Les aspects suivants sont abordés: la santé pré et post-natale; évaluation des défaillanes précoces; les besoins des services judiciaires; manifestations somatiques d'une triade en souffrance; attents et besoins de gynécologues et des pédiatres. [less ▲]

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See detailMercury in the blood of free ranging pinnipeds: levels, sources of variation, toxicocinetic and potential impact using an in vitro model
Das, Krishna ULg; Gillet, Marie-Claire ULg; Habran, Sarah ULg et al

Conference (2007)

Despite 30 years of international regulations, Hg levels in marine mammals have not decreased. Various environmental models even suggest a rise of mercury in the biota during the next decades, linked to ... [more ▼]

Despite 30 years of international regulations, Hg levels in marine mammals have not decreased. Various environmental models even suggest a rise of mercury in the biota during the next decades, linked to climate change. The objective of this study is (1) to assess Hg levels in blood samples of free-ranging pinnipeds, (2) to understand level variation during different periods of life (gestation, lactation, fasting) and potential impact on lymphocytes using a preliminary in vitro model (peripheral blood mononuclear cells, PBMC). Blood samples were collected from harbour seals (Phoca vitulina n= 22) from the North Sea and from elephant seals from the Californian coast (Mirounga angustirostris 12 females and 12 pups). Harbour seal PBMC were isolated, set in medium culture and contaminated with methyl-Hg (1 µM). Biological tests and proteomic assay were realized on control and contaminated PBMC. Hg levels were from the same order of magnitude for the two species despite two different lifestyles and habitats: from 40 to 590 ng.g-1 fw in harbour seal and from 63 to 919 ng.g-1 fw in elephant seal. Hg concentrations in the blood depend upon several factors such as body weight, fasting and lactation duration for mothers and pups. After 21 days of lactation, female elephant seals doubled their blood Hg levels (from 308 to 593 ng.g-1fw) while a decrease is observed for pups. This increase is linked to mobilization from blubber and muscle during fasting associated to lactation. Cell model revealed an in vitro effect of Hg even at low concentration (1µM). Number of PBMC, viability, metabolic activity, DNA and RNA synthesis were reduced in vitro suggesting deleterious effects of Hg in concentrations encountered in free-ranging pinnipeds. Knowing that Hg methylation in the ocean is linked to temperature, one can wonder on Hg levels (and effects) in pinnipeds during the next decades. [less ▲]

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See detailCathéter épicutanéo-cave double voie versus simple voie: une étude randomisée chez le nouveau-né prémature
Marion, W.; Battisti, Oreste ULg; Anthopoulou, N. et al

Conference (2007)

Detailed reference viewed: 82 (6 ULg)
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See detailRespiratory distress syndrome in full-term newborn calves
Rollin, Frédéric ULg; Danlois, Fabien; Aliaoui, Hamani et al

Conference (2007)

Detailed reference viewed: 148 (7 ULg)
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See detailLate Recurrence of Ischemic Mitral Regurgitation after Restrictive Annuloplasty: Is LV Remodeling the Sole Mechanism?
Sénéchal, M; Magne, Julien ULg; Dumesnil, JG et al

Conference (2007)

Detailed reference viewed: 2 (0 ULg)
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See detailA multi-scale strategy for the modelling of failure in masonry plates and shells
Massart, Thierry J.; Mercatoris, Benoît ULg; Diaby, Adama

Conference (2007)

Detailed reference viewed: 11 (0 ULg)
See detailInterest of DOC in the study of consciousness
Vanhaudenhuyse, Audrey ULg

Conference (2007)

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See detailDifferent approaches to measure environmental odours emitted by landfill areas
Romain, Anne-Claude ULg; Delva, Julien ULg; Nicolas, Jacques ULg

Conference (2007)

This paper presents different methods to assess the odour emission and the odour annoyance in the surroundings. It is shown, on the example of landfill areas and composting facilities, that chemical ... [more ▼]

This paper presents different methods to assess the odour emission and the odour annoyance in the surroundings. It is shown, on the example of landfill areas and composting facilities, that chemical analyses are helpful to identify key compounds of the odour release, and to set up the specification of a monitoring instrument. Sensitive methods, like dynamic olfactometry or sniffing team investigation, are mainly applicable to provide a global odour plume or an average annoyance zone. And the electronic nose can supply a warning signal to the plant manager or a real time estimation of the annoyance zone. [less ▲]

Detailed reference viewed: 33 (13 ULg)
See detailHousehod dynamics and the well-beeing after partnership dissolution
Bould, S.; Hartmann, P.; Schmaus, G. et al

Conference (2007)

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See detailSperm quality and cryopreservation in Perca fluviatilis
Linhart, Ottomar; Alavi Hadi, S. M.; Rodina, M. et al

Conference (2007)

Detailed reference viewed: 13 (1 ULg)
See detailShort Course on Validation
Rudaz, Serge; Hubert, Philippe ULg

Conference (2007)

Detailed reference viewed: 8 (0 ULg)
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See detailModeling the black grouse population : a tool for management.
Loneux, Michèle ULg; Lindsey, J.; Poncin, Pascal ULg

Conference (2007)

Detailed reference viewed: 5 (0 ULg)
See detailUitspraakonderwijs en communicatieve aanpak: nog steeds een onmogelijke liefde?
Rasier, Laurent ULg; Hiligsmann, Philippe

Conference (2007)

Detailed reference viewed: 7 (0 ULg)
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See detailMaximum likelihood range dependence compensation for STAP
Neyt, Xavier; Acheroy, Marc; Verly, Jacques ULg

Conference (2007)

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See detailLe tétras lyre dans les Hautes-Fagnes : quarante ans de suivis - dix ans d'actions.
Poncin, Pascal ULg; Keulen, Christine; Loneux, Michèle ULg et al

Conference (2007)

Detailed reference viewed: 6 (0 ULg)
See detailShort Course on Method validation
Boulanger, Bruno ULg; Hubert, Philippe ULg

Conference (2007)

Detailed reference viewed: 3 (0 ULg)
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See detailAlpha-smooth muscle actin immunoreactivity in the human ileum: playing foul play?
Wedel, Theo; Waltregny, David ULg; Bogers, J. P. et al

Conference (2007)

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See detailAn activity-based approach for surveying and modelling travel behaviour: analysis of the mixed-mode design effects
Cools, Mario ULg; Moons, Elke; Wets, Geert

Conference (2007)

Reports from various international organisations, like for instance the European Commission’s White paper “European transport policy for 2010: time to decide” show that policy makers acknowledge the ... [more ▼]

Reports from various international organisations, like for instance the European Commission’s White paper “European transport policy for 2010: time to decide” show that policy makers acknowledge the increasing importance of mobility. Mobility is not just considered to be a cornerstone for economic growth, but also seen as a social need that offers people the opportunity for self-fulfilment and relaxation. In order to lead an efficient policy, governments require reliable predictions of travel behaviour, traffic performance, and traffic safety. Thus, traffic and transportation models can provide the right framework to support long-term decisions. On an international level, activity-based models have become one of the leading paradigms to model travel behaviour. The most important characteristic of these models is that travel is considered as a derivative from the activities that individuals and households need or wish to perform. This means that travel is no longer seen as an isolated fact in these models, which is a great advantage in comparison to the classic models. The development of activity-based models requires very specific data. Since a special emphasis was laid on the dynamic character of the model, both the planned and executed activities were surveyed. 2500 households were selected using a stratified cluster technique. The selected household were asked to fill out an activity-diary and to report rescheduling decisions during a one-week period. Approximately one half of the households received a PDA-module; the other half was surveyed by means of a traditional paper-and-pencil diary. Although both data collection modes were designed in such way that the correspondence of the questions was optimised, it remains essential to identify differences in the data that are introduced by using multiple modes. This paper starts with describing the differences that existed in the questionnaire design of the two modes, and then further explores the statistical differences in terms of some key observations, such as average number of trips reported, and average travel time. [less ▲]

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See detailDetecting awareness in impaired states of consciousness
Vanhaudenhuyse, Audrey ULg

Conference (2007)

Detailed reference viewed: 2 (1 ULg)
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See detailRegulation by androgens of the expression of the EGF receptor family members in prostate cancer cells
Pignon, Jean-Christophe; Delacroix, Laurence; Nolens, Grégory et al

Conference (2007)

Detailed reference viewed: 5 (0 ULg)
See detailEHEC dialogue with eucaryotic cells
Mainil, Jacques ULg

Conference (2007)

Detailed reference viewed: 4 (0 ULg)