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See detailEvidence for phase-locked X-ray variations from the colliding-wind massive binary Cyg OB2 #8A
De Becker, Michaël ULg; Rauw, Grégor ULg

in Rauw, G.; Nazé, Y.; Blomme, R. (Eds.) et al Massive Stars and High-Energy Emission in OB Associations (2005, November)

We report on preliminary results of a multi-observatory investigation of the X-ray emission from the massive colliding wind binary Cyg OB2 #8A (O6If + O5.5III(f)). On the basis of our new XMM-Newton-EPIC ... [more ▼]

We report on preliminary results of a multi-observatory investigation of the X-ray emission from the massive colliding wind binary Cyg OB2 #8A (O6If + O5.5III(f)). On the basis of our new XMM-Newton-EPIC observations, along with archive ASCA-SIS and ROSAT-PSPC data, we show strong evidence for a significant phase-locked variability of the X-ray emission from Cyg OB2 #8A with the period of 21.9 days determined by De Becker et al. (2004). These results lend further support to the colliding wind scenario that was already suggested by optical data (De Becker & Rauw 2005). We briefly discuss the behaviour of the X-ray emission from this binary system as a function of phase in the context of the colliding wind scenario. [less ▲]

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See detailEXploration des processus inhibiteurs dans le vieillissement normal et la maladie d'Alzheimer
Collette, Fabienne ULg; Adam, Stéphane ULg; Hogge, Michaël et al

Conference (2005, November)

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See detailDelayed chlorophyll accumulation and pigment photodestruction in the epicotyls of dark-grown pea (Pisum sativum)
Boddi, B.; Loudeche, R.; Franck, Fabrice ULg

in Physiologia Plantarum (2005), 125(3), 365-372

A comparison was performed of the tetrapyrrole transformations that occur upon irradiation of epicotyl or leaves of dark-grown Pisum sativum L. (var. Zsuzsi, Hungary). High performance liquid ... [more ▼]

A comparison was performed of the tetrapyrrole transformations that occur upon irradiation of epicotyl or leaves of dark-grown Pisum sativum L. (var. Zsuzsi, Hungary). High performance liquid chromatography analysis after continuous or flash-irradiation showed that the biosynthetic pathway from protochlorophyllide (Pchlide) to chlorophyll (Chl) a was markedly slowed down at the step of the reduction of geranylgeranyl(gg)-Chl to dihydrogeranylgeranyl (dhgg)-Chl in epicotyls, whereas phytyl-Chl was synthesized in leaves subjected to the same light treatments. Quantitative pigment analysis during continuous irradiations of different intensities also showed that significant Pchlide photodestruction occurred in epicotyls even under weak light. When both Pchlide and chlorophyllide and/or chlorophylls were present in epicotyls, Pchlide photodestruction was faster under 630-nm light than under 670-nm light, which indicates that this process is most efficiently promoted by Pchlide excitation. Pre-incubation of epicotyl segments with 10 mM ascorbate partly alleviated pigment photodestruction in white light. It is concluded that formation of photoactive Pchlide-Pchlide oxidoreductase complexes is important to prevent fast pigment photooxidation after Pchlide accumulation in the dark. [less ▲]

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See detailPolitiques de l'autobiographie chez Sartre
Denis, Benoît ULg

Conference (2005, November)

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See detailXMM-Newton observations of the Cyg OB2 association
Rauw, Grégor ULg; De Becker, Michaël ULg; Linder, Natacha ULg

in Massive Stars and High-Energy Emission in OB Associations (2005, November)

We present the first results of an observing campaign of the Cyg OB2 association with the XMM-Newton observatory. The brightest OB-type stars exhibit rather hard spectra suggesting that at least part of ... [more ▼]

We present the first results of an observing campaign of the Cyg OB2 association with the XMM-Newton observatory. The brightest OB-type stars exhibit rather hard spectra suggesting that at least part of their X-ray emission arises in a wind-wind interaction. The EPIC images reveal a large number of fainter X-ray sources most of which are probably low-mass pre-main sequence stars belonging to Cyg OB2. [less ▲]

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See detailScience and Society: Death, Unconsciousness and the Brain
Laureys, Steven ULg

in Nature Reviews. Neuroscience (2005), 6(11), 899-909

The concept of death has evolved as technology has progressed. This has forced medicine and society to redefine its ancient cardiorespiratory centred diagnosis to a neurocentric diagnosis of death. The ... [more ▼]

The concept of death has evolved as technology has progressed. This has forced medicine and society to redefine its ancient cardiorespiratory centred diagnosis to a neurocentric diagnosis of death. The apparent consensus about the definition of death has not yet appeased all controversy. Ethical, moral and religious concerns continue to surface and include a prevailing malaise about possible expansions of the definition of death to encompass the vegetative state or about the feared bias of formulating criteria so as to facilitate organ transplantation. [less ▲]

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See detailOn the multiplicity of the non-thermal radio emitters 9 Sgr and HD 168112
Rauw, Grégor ULg; Sana, H.; Gosset, Eric ULg et al

in Massive Stars and High-Energy Emission in OB Associations (2005, November)

We discuss the first results of our ongoing optical spectroscopic monitoring campaign of the two O-type stars 9 Sgr and HD 168112. Both objects display a non-thermal radio emission and were considered as ... [more ▼]

We discuss the first results of our ongoing optical spectroscopic monitoring campaign of the two O-type stars 9 Sgr and HD 168112. Both objects display a non-thermal radio emission and were considered as single stars. Based on a large set of high-resolution spectra, we find that 9 Sgr is clearly an eccentric SB2 binary with an orbital period of several years. On the other hand, no evidence for radial velocity variations attributable to binary motion is found in our spectra of HD 168112. [less ▲]

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See detailCampagne de mesure des odeurs sur le CET et la zone de compostage de Habay Estimation des nuisances olfactives
Nicolas, Jacques ULg; Denne, Pierre; Cobut, Pierre

Report (2005)

The study is conducted in the frame of a programme of monitoring of all landfill sites in Wallonia. The "odour" part is assigned to ULg. The present report concerns more particularly the landfill and ... [more ▼]

The study is conducted in the frame of a programme of monitoring of all landfill sites in Wallonia. The "odour" part is assigned to ULg. The present report concerns more particularly the landfill and composting site of Habay. Besides the usual field inspection technique, the research group has used GC-MS to estimate the chemical composition of the atmosphere over the composting area. [less ▲]

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See detailL'aide à l'arrêt du tabagisme : une nécessité
Delvaux, Muriel ULg; Etienne, Anne-Marie ULg; Bartsch, Pierre ULg et al

in Revue Médicale de Liège (2005), 60(11), 863-866

Today the smoker carries a risk of mortality 70% higher compared to the nonsmoker. In Belgium active smoking is indisputably the most important cause of avoidable death. In 2004 it appears that 27% of the ... [more ▼]

Today the smoker carries a risk of mortality 70% higher compared to the nonsmoker. In Belgium active smoking is indisputably the most important cause of avoidable death. In 2004 it appears that 27% of the belgian population was smoking. This review describes the comorbidity associated with active tobacco consumption and defines the concepts of dependence and smoking cessation. It also identifies the three factors which determine the success of smoking cessation, i.e. the degree of nicotinic dependence, the presence of anxio-depressive disorders and the importance of the motivation to the stop. [less ▲]

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See detailIMPACT DE L’EVOLUTION REGLEMENTAIRE EUROPEENNE SUR LES PRATIQUES AGRICOLES DES EXPORTATEURS ACP ET PROGRAMME DE FORMATION DES CADRES DES ENTREPRISES MIS EN PLACE POUR LE PROGRAMME PIP DU COLEACP
Schiffers, Bruno ULg

Conference (2005, November)

La succession des crises alimentaires a poussé les consommateurs européens à exiger toujours plus de garantie quant à la sécurité de l’alimentation destinée à l’homme et aux animaux d’élevage. La ... [more ▼]

La succession des crises alimentaires a poussé les consommateurs européens à exiger toujours plus de garantie quant à la sécurité de l’alimentation destinée à l’homme et aux animaux d’élevage. La législation européenne a, en conséquence, évolué rapidement et le niveau d’exigence s’est fortement accru, le principe de base étant pour le producteur, l’importateur et le distributeur de pouvoir prouver aux autorités compétentes que toutes les précautions ont été prises, qu’une traçabilité des produits entrant dans la chaîne alimentaire existe et que, en cas de problème avéré ou suspecté, une procédure de notification, de rappel ou de retrait a été prévue et mise en place. Pour les producteurs ACP, ces évolutions les ont conduit à devoir modifier dans l’urgence leurs pratiques. La réussite de la mise en conformité et la mise en pratique dans les entreprises d’une politique de management de la qualité a exigé un effort important de formation non seulement au niveau des managers, des cadres et du personnel des entreprises, mais aussi au niveau de tous les acteurs qui gravitent autour de la filière « fruits et légumes d’exportation ». Le PIP a développé un dispositif de formation basé sur la capitalisation de compétences chez les acteurs locaux : prestataires de services et formateurs ACP, cadres techniques intermédiaires, responsables de laboratoire, agents de l’état chargés du contrôle, etc. Commencées depuis 2003, les actions du PIP en faveur des entreprises ACP concernent à présent plus de 80% du tonnage des fruits et légumes frais (hors bananes) exportés vers l’Union européenne. [less ▲]

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See detailMassive Stars and High-Energy Emission in OB Associations
Rauw, Grégor ULg; Nazé, Yaël ULg; Blomme, Ronny et al

Book (2005)

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See detailEffect of nutritional status on oxidative stress in an ex vivo perfused rat liver
Stadler, M.; Nuyens, V.; Seidel, Laurence ULg et al

in Anesthesiology (2005), 103(5), 978-986

Background: Normothermic ischemia-reperfusion is a determinant in liver injury occurring during surgical procedures, ischemic state, and multiple organ failure. The preexisting nutritional status of the ... [more ▼]

Background: Normothermic ischemia-reperfusion is a determinant in liver injury occurring during surgical procedures, ischemic state, and multiple organ failure. The preexisting nutritional status of the liver might contribute to the extent of tissue injury and primary nonfunction. The aim of this study was to determine the role of starvation on hepatic ischemia-raperfusion injury in normal rat livers. Methods: Rats were randomly divided into two groups: one had free access to food, the other was fasted for 16 h. The portal vein was cannulated, and the liver was removed and perfused in a closed ex vivo system. Two modes of perfusion were applied in each series of rats, fed and fasting. In the ischemia-reperfusion mode, the experiment consisted of perfusion for 15 min, warm ischemia for 60 min, and reperfusion during 60 min. In the nonischemia mode, perfusion was maintained during the 135-min study period. Five rats were included in each experimental condition, yielding a total of 20 rats. Liver enzymes, potassium, glucose, lactate, free radicals, ie., dienes and trienes, and cytochrome c were analyzed in perfusate samples. The proportion of glycogen in hepatocytes was determined in tissue biopsies. Results: Transaminases, lactate dehydrogenase, potassium, and free radical concentrations were systematically higher in fasting rats in both conditions, with and without ischemia. Cytochrome c was higher after reperfusion in the fasting rats. Glucose and lactate concentrations were greater in the fed group. The glycogen content decreased in both groups during the experiment but was markedly lower in the fasting rats. Conclusions: In fed rats, liver injury was moderate, whereas hepatocytes integrity was notably impaired both after continuous perfusion and warm ischemia in fasting animals. Reduced glycogen store in hepatocytes may explain reduced tolerance. [less ▲]

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See detailAffective valence and the self-reference effect: influence of retrieval conditions
D'Argembeau, Arnaud ULg; Comblain, Christine; Van der Linden, Martial ULg

in British Journal of Psychology (2005), 96(Pt 4), 457-466

Positive trait information is typically better recalled than negative trait information when encoded in reference to the self, but not when encoded in reference to someone else or when processed for ... [more ▼]

Positive trait information is typically better recalled than negative trait information when encoded in reference to the self, but not when encoded in reference to someone else or when processed for general meaning. This study examined whether this influence of affective meaning is modulated by retrieval conditions. Participants encoded positive and negative trait adjectives in reference to themselves or to a celebrity. They were then presented with either a free-recall task (Experiment 1) or a recognition memory task (Experiment 2). Positive adjectives were better recalled than negative adjectives, but only when they were encoded in reference to the self. In contrast, encoding condition and valence did not interact in the recognition memory task. Taken together, these findings suggest that the difference in memory between positive and negative self-referent information is due, at least in part, to a control exerted on memory retrieval. [less ▲]

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See detailLa bibliothèque virtuelle de Google
Renaville, François ULg

Article for general public (2005)

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See detailAnalysis of gas holdup in bubble columns with non-Newtonian fluid using electrical resistance tomography and dynamic gas disengagement technique
Fransolet, E.; Crine, A.; Marchot, Pierre ULg et al

in Chemical Engineering Science (2005), 60(22 Sp. Iss. SI), 6118-6123

This paper presents an experimental analysis of the influence of the liquid rheology on the gas flow pattern in a bubble column reactor. Aqueous solutions of xanthan are selected as an example of non ... [more ▼]

This paper presents an experimental analysis of the influence of the liquid rheology on the gas flow pattern in a bubble column reactor. Aqueous solutions of xanthan are selected as an example of non-Newtonian shear thinning fluid. Averaged gas holdup is determined by two experimental techniques: parietal pressure probes and electrical resistance tomography (ERT). ERT is also used to provide 2D images of the gas phase distribution in a column cross-section. Bubble size distributions are evaluated by a gas disengagement technique using the parietal pressure probes. All these techniques clearly show the gas flow pattern is different in Newtonian and non-Newtonian fluids. Gas holdup values decrease when increasing the liquid viscosity and reach a minimum or a plateau. Homogeneous flow regime, observed in water at low gas velocities, tends to disappear when viscosity increases. This evolution is visualized by a much less isotropic distribution of the gas phase within cross-section of the column and by the appearance of much larger bubbles due to an increased coalescence phenomenon. (c) 2005 Elsevier Ltd. All rights reserved. [less ▲]

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See detailIs There a Difference Between Energy Balance of Cats Hospitalised for Surgical or for Medical Reasons?
Lhoest, Estelle; Claeys, Stéphanie ULg; Gabriel, Alexendra et al

in Journal of Veterinary Internal Medicine (2005, November), 19(6), 939

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See detailA nation-wide project for the revision of the Belgian Nursing Minimum Dataset: from concept to implementation
THONON, Olivier ULg; CODOGNOTTO, Jean ULg; GILLET, Pierre ULg et al

in EfCCNa (Ed.) Proceedings of the 2nd Congress of the EfCCNa (2005, November)

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See detailDe "La Salle de bain" à "Fuir"
Demoulin, Laurent ULg

in Indications. La Revue des romans (2005), 62e série(5), 13-24

Description du parcours romanesque de Jean-Philippe Toussaint, centré sur son originalité et sur ses diverses évolutions stylistiques et narratologiques.

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See detailProlactinomas : Advances in Treatment of Endocrine Diseases
Beckers, Albert ULg

Scientific conference (2005, November)

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