References of "Poster"
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See detailSimple heuristic model of an aerosol filter
Lecocq, Rapahaël; Calvo, Sébastien ULg; Saroha, Anil et al

Poster (2006)

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See detailUranyl-selenites, unique minerals of Musonoï Mine, Katanga, DRC
Pirard, Cassian; Hatert, Frédéric ULg

Poster (2006)

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See detailCarbon dioxide in European coastal waters
Borges, Alberto ULg; Schiettecatte, L.-S.; Abril, G. et al

Poster (2006)

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See detailSound production mechanism in Amphiprion clarkii (Teleostei: Pomacentridae)
Colleye, Orphal ULg; Herrel, Anthony; Vandewalle, Pierre ULg et al

Poster (2006)

In the family Pomacentridae, six genera were reported as sound producers: Amphiprion, Dascyllus, Stegastes, Chromis, Abudefduf and Plectroglyphidodon. The anemonefishes (Amphiprioninae) live in social ... [more ▼]

In the family Pomacentridae, six genera were reported as sound producers: Amphiprion, Dascyllus, Stegastes, Chromis, Abudefduf and Plectroglyphidodon. The anemonefishes (Amphiprioninae) live in social group in association with sea anemones, which protect them from predators. Their sound emissions seem involved in courtship and territorial defense, contributing to both survival and reproductive success. However, the mechanism of sound production is unresolved. It has been hypothesized that it involves swimbladder or the action of the pharyngeal jaws amplified by swimbladder. The aim of this study was to understand the sonic mechanism involved in the agonistic sounds in Amphiprion clarkii. The approach consists in high-speed cineradiography and functional morphology. During agonistic sounds (pops), fishes perform different movements such as skull elevation, pectoral girdle retraction, hyoid lowering and mouth closing. Pops are produced when the hyoid is completely lowered and the mouth closed. The simultaneous realization of these movements was never observed in teleost. In Amphiprion sp., it is possible due to an additional ligament inserted on the hyoid bar and on the inner lower jaw. The hyoid lowering combined to the closing (and thus the elevation) of the mandible could generate a tension of the ligament, provoking its vibration [less ▲]

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See detailEncapsulation of the sunscreen agent, octyl dimethyl PABA, in lipid microparticles: effect on photostability
Tursilli, Rosanna; Scalia, Santo; Piel, Géraldine ULg et al

Poster (2006)

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See detailTime series of the partial pressure of carbon dioxide (2001 2004) and preliminary inorganic carbn budget in the Scheldt plume (Belgian coastal waters)
Schiettecatte, L.-S.; Gazeau, F.; van der Zee, C. et al

Poster (2006)

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See detaillymphatic ring assay: a new in vitro model of lymphangiogenesis
Bruyère, F; Melen, L; Blacher, Silvia ULg et al

Poster (2006)

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See detailLa BREFA, Batterie Rapide d’Evaluation des Fonctions Attentionnelles chez l’enfant : données préliminaires.
Catale, Corinne ULg; Hogge, Michaël; Meulemans, Thierry ULg

Poster (2006)

En neuropsychologie de l’enfant, les troubles attentionnels et exécutifs sont rapportés dans un grand nombre de pathologies développementales (autisme, trouble de l’attention avec hyperactivité… ; voir ... [more ▼]

En neuropsychologie de l’enfant, les troubles attentionnels et exécutifs sont rapportés dans un grand nombre de pathologies développementales (autisme, trouble de l’attention avec hyperactivité… ; voir Pennington & Ozonoff, 1996) et de pathologies acquises (par exemple, le traumatisme crânien [TC]). Et pourtant, le neuropsychologue se trouve encore souvent démuni pour l’évaluation clinique et psychométrique des fonctions attentionnelles et exécutives chez l’enfant. Les quelques épreuves disponibles sont pour la plupart issues de la neuropsychologie de l’adulte et sont de ce fait peu adaptées à l’enfant. Outre le manque d’attractivité qui les caractérise, ces épreuves sont souvent peu pertinentes dans une perspective développementale, en particulier parce qu’elles ne peuvent être administrées que si l’enfant a déjà acquis, au préalable, certaines habiletés cognitives (par exemple, la lecture pour l’épreuve du Stroop ou la connaissance de la chaîne alphabétique pour le Trail Making Test). L’objectif du présent travail consiste à développer une batterie d’évaluation du fonctionnement attentionnel et exécutif (BREFA) adaptée à l’enfant et qui prend en considération les écueils théoriques et cliniques évoqués ci-dessus. Basée sur le modèle de Posner et Petersen (1990), cette batterie a été administrée à 109 enfants âgés de 5 à 11 ans sans antécédents neurologiques. Les épreuves incluses dans la batterie se veulent attractives pour l’enfant (stimuli colorés et familiers) et permettent d’évaluer les capacités d’attention sélective, d’attention soutenue, de flexibilité et d’inhibition cognitive. Des analyses de variance ont été réalisées pour chaque épreuve, avec le groupe d’âge (5 ans - 6 ans - 7 ans - 8 ans - 9 ans - 10 ans - 11 ans) comme variable indépendante. Outre un effet développemental pour l’ensemble des épreuves administrées (p < .001), les analyses post-hoc montrent une amélioration des performances particulièrement marquée pour la tranche 5-8 ans aux épreuves d’inhibition et de flexibilité (p < .05), résultat compatible avec les données issues la littérature (Klenberg, Korkman, & Lahti-Nuutila, 2001). Par ailleurs, des données préliminaires obtenues auprès d’un groupe de 10 enfants atteints d’un TC léger suggèrent que les épreuves de flexibilité et d’inhibition proposées dans la BREFA sont sensibles aux difficultés attentionnelles et exécutives que peuvent présenter ces enfants. [less ▲]

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See detailEtude de l'appareil producteur de sons d'Ophidion barbatum
Fontenelle, Nicolas; Henrist, Catherine ULg; Cloots, Rudi ULg et al

Poster (2006)

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See detailMéthode d'analyse du mouvement de l'épaule par utilisation de nappes
Schwartz, Cédric ULg; Lempereur, Mathieu; Burdin, Valérie et al

Poster (2006)

Nous proposons une méthode permettant d’étudier le mouvement des structures osseuses du complexe de l'épaule (humérus, omoplate, clavicule). Cette méthode est basée sur le suivi de nappes de marqueurs ... [more ▼]

Nous proposons une méthode permettant d’étudier le mouvement des structures osseuses du complexe de l'épaule (humérus, omoplate, clavicule). Cette méthode est basée sur le suivi de nappes de marqueurs plutôt qu'un ensemble de marqueurs individuels à l'aide d'un système de caméras VICON. Le suivi du mouvement des nappes par un algorithme de recalage robuste doit permettre de s'affranchir du mouvement de la peau et avoir accès aux mouvements des structures osseuses sous-jacentes. Cette méthode est comparée à une méthode standard de la littérature. Les résultats montrent que le mouvement de l’omoplate est sous estimé ou sur estimé suivant les axes de rotation. [less ▲]

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See detailPerception of aphid infested tomato plant volatiles by the predator Episyrphus balteatus
Verheggen, François ULg; Arnaud, Ludovic; Capella, Quentin et al

Poster (2006)

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See detailNew validation strategy for the LC determination of ascorbic acid in sublingual tablets
Cahay, B.; Rousseau, Anne ULg; Klinkenberg, R. et al

Poster (2006)

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See detailIon beam induced luminescence of minerals
Calvo Del Castillo, Helena ULg; Ruvalcaba Sil, Jose Luis; Calderón, Tomás

Poster (2006)

See detailOrigine biogénétique des triterpènes pentacycliques présents dans la sécrétion défensive de Platyphora Kollari (Chrysomelidae)
Ghostin, Jean; Laurent, Pascal ULg; Daloze, Désiré et al

Poster (2006)

Les chrysomèles sont des insectes phytophages brillement colorés qui représentent une des famille (Chrysomelidae) les plus importante de l'ordre des coléoptères. Etant aposématiques, ils sont facilement ... [more ▼]

Les chrysomèles sont des insectes phytophages brillement colorés qui représentent une des famille (Chrysomelidae) les plus importante de l'ordre des coléoptères. Etant aposématiques, ils sont facilement repérables par des prédateurs potentiels et ont, au cours de l'évolution, développé des mécanismes de défense chimique élaborés. La découverte de glycosides triterpéniques basés sur le squelette oléanane a soulevé le problème de leur origine biogénétique. En effet, il est bien connu que les insectes ne possèdent pas la squalène synthase, une enzyme indispensable à la formation des stéroïdes et des triterpènes pentacycliques. Dès lors, une biosynthèse de novo de ce type de dérivé est peu probable. Par ailleurs, l'analyse de la plante hôte des chrysomèles a montré que la séquestration des glycosides au départ de cette plante est également exclue. Une troisième possibilité serait que l'insecte utilise un précurseur provenant de son alimentation pour fabriquer ses substances défensives. Un tel précurseur pourrait être la b-amyrine identifiée chez différentes plantes hôtes des chrysomèles ou l'acide oléanolique dont la structure de base se retrouve au niveau des triterpènes défensifs. Enfin, l'analyse des plantes hôtes a montré que celles-ci contiennent à la fois de la b-amyrine et de l'a-amyrine dans un rapport 1,76/1. Cependant aucun glycoside triterpénique basé sur le squelette ursane n'a été isolé jusqu'à présent chez les chrysomèles, ce qui suggère un mécanisme de transport sélectif en faveur de la b-amyrine. Dans le cadre de ce travail, nous présenterons les synthèses d'a-amyrine, de b-amyrine et d'acide oéanolique trideutériés, ainsi que les résultats d'incorporation des deux premiers précurseurs chez Platyphora kollari. [less ▲]

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See detailImproving control of storage diseases on apple by combining biological and physical postharvest methods
Creemers, P.; Van Laer, S.; Vorstermans, B. et al

Poster (2006)

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See detailPostharvest biological control of grey mould rot on strawberry fruit using moderately halophilic bacteria
Essghaier, B.; Sadfi-Zouaoui, N.; Fardeau, M. L. et al

Poster (2006)

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See detailStudy of the combined effects of temperature, pH and Aw on the growth rate of Trichoderma asperellum using a response surface methodology
Begoude, B. A. D.; Lahlali, R.; Friel, D. et al

Poster (2006)

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See detailGenomic structure of new tunisian peach latent mosaic viroid variants
Fekih Hassen, I.; Massart, Sébastien ULg; Roussel, S. et al

Poster (2006)

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See detailMulti-biomaterial for controlled release of active substances
Zalfen, Alina; Nizet, Dominique; Jérôme, Christine ULg et al

Poster (2006)

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See detailImpact of Mycosphaerella fijiensis toxins on banana antioxidant systems.
Busogoro, J. P.; Olivier, T.; Leiva, M. et al

Poster (2006)

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See detailStudy of the modes of action of two biocontrol agents Z1 and ZH2
Drider, R.; Friel, D.; El Guilli, M. et al

Poster (2006)

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See detailEtude épidémiologique du viroïde de la mosaïque latente du pêcher en Tunisie
Fekih Hassen, I.; Massart, Sébastien ULg; Roussel, S. et al

Poster (2006)

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See detailNutritional involment in the biocontrol activity of Aureobasidium pullulans against blue mold on apples
Krimi Bencheqroun, S.; Bajji, M.; Bentata, F. et al

Poster (2006)

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See detailDevelopment of real time PCR for quantification of Erwinia spp infecting potato tubers in Belgium
Moh, A.; Massart, Sébastien ULg; Roussel, S. et al

Poster (2006)

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See detailValidation of a potentiometric method using azithromycin selective electrode
Rachidi, Mohamed ULg; Cherra, Y.; Digua, K. et al

Poster (2006)

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See detailPrenatal development study of rat Corti organ at the morphological level
Thelen, N; Malgrange, B; Thiry, Marc ULg

Poster (2006)

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See detailRoutes to increase the relaxivity of contrast agents for MRI
Thonon, David ULg; Vanasschen, Christian; Paris, Jérôme et al

Poster (2006)

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See detailEchinoderm skeletons record sea temperatures
Ranner, Herwig; Ladrière, Ophélie ULg; Navez, Jacques et al

Poster (2005, December 31)

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See detailModulation of Dayside Reconnection During Northward IMF
Provan, G.; Lester, M.; Cowley, S. W. et al

Poster (2005, December 01)

On 17 September 2000 the IMF was directed continuously northward for more than three hours. Density fluctuations in the solar wind resulted in quasi-periodic variations in the solar wind dynamic pressure ... [more ▼]

On 17 September 2000 the IMF was directed continuously northward for more than three hours. Density fluctuations in the solar wind resulted in quasi-periodic variations in the solar wind dynamic pressure, and correlated fluctuations also occurred in the IMF Bz component. The Northern hemisphere SuperDARN radars observed bursts of high-latitude high-velocity plasma flow during this northward IMF interval, both when ionospheric signatures consistent with low-latitude merging were observed, and when lobe merging was occurring. On average the recurrence period of these flow bursts was ~22 min. During this time the SI-12 spectrographic imager channel on the IMAGE spacecraft observed the dayside proton auroral spot continuously (Frey et al., 2003). The brightness of the auroral spot varied over time. Here we find a direct correlation between the occurrence of bursts of plasma flow and periodic fluctuations in the brightness of the proton auroral spot. Our results suggest that correlated fluctuations in the solar wind dynamic pressure and IMF Bz component modulated ionospheric precipitation and dayside reconnection, resulting in fluctuations in the brightness of the proton auroral spot and periodic variations in the dayside high-latitude plasma flow. [less ▲]

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See detailWhat controls pCO2 dynamics in Antarctic sea ice and related air-ice CO2 fluxes?
Delille, Bruno ULg; Schoemann, Véronique; Lancelot, Christiane et al

Poster (2005, December)

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See detailComparison of the Sensititre YeastOne and Fungitest methods with the NCCLS M27-A2 reference method for antifungal susceptibility testing of yeasts
Hayette, Marie-Pierre ULg; Kondarowski, E.; Melin, Pierrette ULg et al

Poster (2005, December)

Background: The recent introduction of Sensititre YeastOne, a colorimetric microdilution method that includes new antifungal agents has opened the field to MIC’s determination by an easy-to-perform method ... [more ▼]

Background: The recent introduction of Sensititre YeastOne, a colorimetric microdilution method that includes new antifungal agents has opened the field to MIC’s determination by an easy-to-perform method. The aim of this study was to compare this test with the NCCLS M27-A protocol and with Fungitest, a current routine method for yeasts susceptibility testing. Methods: Sensititre YeastOne method (Trek diagnostic), and the NCCLS M27-A2 were performed on 300 yeasts clinical isolates distributed as follow: 125 C. albicans, 273 non-albicans species. Four antifungal agents were tested by the reference method: amphotericine B (AmB), fluconazole (FZ), itraconazole (ITZ), and voriconazole (VOR). The reading of the Sensititre and NCCLS results was visually performed after 24 and 48 h respectively. The Fungitest (Biorad) method was applied on 121 among the 300 isolates and the reading was made after 24 to 48 h incubation time according to the positive control growth. Results: By the NCCLS method, the MICs50/MICs90 (µg/ml) were as follows: 1/2 (AmB); 16/64 (FZ); 0.25/4 (ITZ) and 0.125/2 (VOR). Sensititre vs. NCCLS: The overall agreement within 2 dilutions for AmB, FZ, ITZ and VOR was respectively 54, 82, 80 and 78%. The MICs50/MICs90 were in absolute concordance for VOR by both techniques. Very major errors (%) were recorded as follows: 0.01/0 (AmB with a MIC ≥ 4/8µg/ml for resistant strains respectively), 1.6 (FZ), 3.6 (ITZ) and 2.3 (VOR with a MIC ≥ 8µg/ml for resistant strains). Fungitest vs. NCCLS: The agreement between both methods including minor discrepancies was 98% (AmB), 88% (FZ) and 98% (ITZ). Following the breakpoints given by the manufacturer, very major errors were 6.3% for FZ, 0.03% for ITZ and none for AmB. Conclusions: Sensititre is a convenient alternative to the NCCLS method for yeast susceptibility testing. Fungitest in spite of good correlations must change the breakpoints and include new antifungal agents to be competitive. [less ▲]

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See detailStudy of neuronal cells preconditionning
Guelluy, Pierre-Henri ULg; Mouithys-Mickalad, Ange ULg; Deby, Ginette et al

Poster (2005, November 25)

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See detailFlow Cytometry for the follow-up of Trypanosoma evansi infection in a mouse model
Antoine-Moussiaux, Nicolas ULg; Leroy, ; Faisca, et al

Poster (2005, November 18)

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See detailDemonstration by flow cytometry that CD5+CD8+ cells carry alcelaphine herpesvirus 1 in inoculated rabbits developing malignant catarrhal fever
Dewals, Benjamin G ULg; Gillet, Laurent ULg; Vanderplasschen, Alain ULg

Poster (2005, November 18)

Alcelaphine herpesvirus 1 (AlHV 1), carried by wildebeest (Connochaetes taurinus) asymptomatically, causes malignant catarrhal fever (MCF) when cross species transmitted to a variety of susceptible ... [more ▼]

Alcelaphine herpesvirus 1 (AlHV 1), carried by wildebeest (Connochaetes taurinus) asymptomatically, causes malignant catarrhal fever (MCF) when cross species transmitted to a variety of susceptible species of the Artiodactyla order. MCF is a fascinating disease described as a combination of lymphoproliferative and degenerative lesions. The study of MCF pathogenesis has been impeded by an inability to produce recombinant virus, due mainly to the fact that AlHV 1 becomes attenuated during passage in culture. Here, we have overcome these difficulties by (i) cloning the entire AlHV 1 genome as a stable, infectious and pathogenic bacterial artificial chromosome (BAC), and (ii) by using prokaryotic recombination technology for the production of an AlHV 1 recombinant. Firstly, the AlHV 1 genome was BAC cloned using one insertion site in a region containing no open reading frame. This insertion allowed the production of an AlHV 1 BAC clone stably maintained in bacteria and able to regenerate virions when transfected into permissive cells. BAC derived AlHV 1 virions induced MCF in rabbits comparably to the AlHV 1 wild type (WT) strain. Secondly, a two step mutagenesis procedure in E. coli was used to generate a recombinant strain expressing enhanced-green fluorescent protein (EGFP) as a reporter gene. After reconstitution of recombinant virions into permissive cells and excision of the BAC cassette, flow cytometry analyses were performed to validate the recombinant strain and to investigate the pathogenesis of MCF. The results of these analyses can be summarized as follows: (i) the validity of the EGFP expression cassette as a reporter gene has been demonstrated by in vitro infections; (ii) inoculation of rabbits revealed that the recombinant strain has retained the pathogenicity of its parental strain and that the cell types carrying AlHV-1 in peripheral blood mononuclear cells, lymph nodes and the spleen are mainly CD5+ CD8+ cells. [less ▲]

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See detailIodide organification disorder in autonomous thyroid nodule.
Tang, B. N. T.; Corvilain, B.; Seret, Alain ULg et al

Poster (2005, November 15)

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See detailEffect of cyclodextrins on the membrane permeability of liposomes
Piel, Géraldine ULg; Piette, Marie ULg; Barillaro, Valery et al

Poster (2005, November)

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See detailPseudomembranous colitis with Clostridium difficile during treatment by moxifloxacine (quinolone)
Le Goff, Caroline ULg; Wiesen, Patricia ULg; Collette, Julien ULg et al

Poster (2005, October 27)

C. difficile is the most frequently pathogenic agent isolated in colitis associated with antibiotics and pseudomembranous colitis (PMC). C. difficile takes advantage of the disturbance of the intestinal ... [more ▼]

C. difficile is the most frequently pathogenic agent isolated in colitis associated with antibiotics and pseudomembranous colitis (PMC). C. difficile takes advantage of the disturbance of the intestinal flora to settle. We report a case of PMC appeared during treatment with moxifloxacine in a pulmonary infection in an emphysematous patient. The diarrhea is generally benign, but can be severe, with toxic megacolon or even the extreme case of colic perforation. The diagnosis is based on the research of toxins of C. difficile (A and/or B) in the intestinal stools or liquids (collected at the time of the endoscopic examination) to which is associated the anaerobic culture on selective agar. The reference method is the measurement of the cytotoxic effect of the B-toxin on a cell culture. Metronidazole or vancomycine constitutes the treatment. The prevention of relapses is very important, hygiene measures and probiotic agents must be associated to the antibiotic treatment. [less ▲]

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See detailEvaluation of the new Elisa CCp assay on unicap 100
Lutteri, Laurence ULg; Malaise, Michel ULg; Chapelle, Jean-Paul ULg

Poster (2005, October 27)

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See detailPourquoi tant de flux d'élèves dans les écoles en discrimination positive ?
Bouchat, Thérèse Marie; Hindryckx, Geneviève ULg

Poster (2005, October 18)

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See detailSynthese enzymatique d’esters de sucre au départ d’huiles végétales
Detry, J.; Destain, Jacqueline ULg; Lognay, Georges ULg et al

Poster (2005, October 14)

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See detailSynthesis of anhydro-muranic acid derivatives as substrates for MurNAc amidase.
Mercier, F.; Lemaire, Christian ULg; Plenevaux, Alain ULg et al

Poster (2005, October 10)

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See detailSynthesis of protected meso-diaminopimelic acid.
Teller, N.; Lemaire, Christian ULg; Plenevaux, Alain ULg et al

Poster (2005, October 10)

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See detailLes activités de REQYASUD - Analyses de terre
Genot, Valérie ULg

Poster (2005, October 02)

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See detailFirst evidence for a resolved structure in the inner Vega system
Absil, Olivier ULg

Poster (2005, October 01)

We report on infrared interferometric observations of Vega obtained in May and June 2005 with the FLUOR instrument installed on the CHARA interferometer. The combination of short and long baselines has ... [more ▼]

We report on infrared interferometric observations of Vega obtained in May and June 2005 with the FLUOR instrument installed on the CHARA interferometer. The combination of short and long baselines has allowed us to study the brightness distribution of the stellar photosphere, and to detect a spatial component which is over-resolved at our lowest resolution (~15 milli-arcseconds). This would be attributed to structure much larger than Vega, but within the CHARA/FLUOR field-of-view (about 1 arcsecond in radius, i.e., 8 AU around Vega). The contrast between the resolved flux and the central star is only slightly above the 1% level in K band. This emission could be interpreted as the first direct detection of thermal and/or scattered light emanating from the innermost part of the Vega debris disk, which is thought to be continuously replenished by asteroid collisions and/or comet evaporation. The possibility of a close stellar or sub-stellar companion is also investigated. [less ▲]

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See detailFirst-Principles Study of Lattice Vibration in Ga2O3 nanowires
Xu, Bin ULg; Dong, Jianjun

Poster (2005, October)

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See detailÉtude de la texture poreuse d'un matériau polymère cellulaire utilisé en ingénierie tissulaire par microtomographie à rayons X
Lecocq, Raphaël; Toye, Dominique ULg; Maquet, Véronique et al

Poster (2005, October)

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See detailCarbon nanotubes synthesis by CCVD process : kinetic study on a Fe-Co/Al2O3 catalyst
Pirard, Sophie ULg; Douven, Sigrid ULg; Bossuot, Christophe et al

Poster (2005, October)

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See detailAnalyse quantitative de la texture poreuse d'un matériau polymère cellulaire basée sur des images de microtomographie à rayons X
Lecocq, Raphaël; Toye, Dominique ULg; Maquet, Véronique et al

Poster (2005, October)

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See detailCharacterization of bovine and human cellular prion protein expressed in the central nervous system and in lymphoid organs.
Defaweux, Valérie ULg; Stramiello, Sara; Capellari, Sabina et al

Poster (2005, October)

Prion cell tropism varies significantly among animal species, depending on both the agent strain and host-specific factors. For example, prions show high lymphotropism in scrapie infected sheep and vCJD ... [more ▼]

Prion cell tropism varies significantly among animal species, depending on both the agent strain and host-specific factors. For example, prions show high lymphotropism in scrapie infected sheep and vCJD, but little, if any, in sCJD or BSE. In particular, the BSE strain is associate with significant PrP-res accumulation in tonsils, spleen and appendix in humans, whereas, it is largely confined to the nervous system in infected cattle. So, it appears that, at least in the case of BSE and vCJD, host properties can influence the accumulation of the infectious agent in lymphoid organs. Given that the normal cellular prion protein (PrPC), is sine qua non for PrP-res formation and the development of TSE, it appears reasonable to hypothesize that tissue-specific PrPC properties may represent one of the host factors influencing the cell tropism of the infectious agent in human or bovine. We applied a western blot analyses to compare the relative percentage of the di-, mono- and unglycosylated PrPC (the so called glycoform ratio) as well as the expression of truncated PrPC forms in tissues from the central nervous system and lymphoid structures (lymphoid follicles, lymphocytes and follicular dendritic cells) of both bovine and human. We found that PrPC glycoform ratio is significantly different between cerebellum and medulla in both bovine and human. Moreover, the expression of truncated forms of PrPC (i.e. 21 and 18 kDa PrPC) was also significantly heterogenous according to the brain region investigated. PrPC was highly glycosylated in spleen and lymphoid follicles isolated from bovine tonsils, mesenteric lymph nodes, ileal and jejunal Peyer’s patches. After deglycosylation, a novel PrPC truncated form with a relative molecular mass of about 25 kDa was detected in bovine lymphoid organs beside the typical 18 and 21 kDa forms. No difference in WB PrPC profile was seen in human lymphocytes extracted either from spleen or tonsil. Our results highlight variation in the profile expression of PrPC in peripheral and central tissues of bovine and human. Such differences may have an implication for PrPC function or may represent critical factors influencing the accumulation of the infectious agent in these areas. Supported by the EU contract QLG3-CT-2002-81030. [less ▲]

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See detailTowards the production of carbon xerogel monoliths by optimizing convective drying conditions
Léonard, Angélique ULg; Sabatier, Françoise; Job, Nathalie ULg et al

Poster (2005, October)

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See detailL'infection par les prions pathogènes modifie l'expression menbranaire de la PrPc par les cellules dendritiques
Dorban, G; Demonceau,C; Levavasseur, E et al

Poster (2005, October)

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Peer Reviewed
See detailEcomorphology of the Pomacentridae skull: a landmark-based geometric morphometric approach
Pilet, Arnaud; Frederich, Bruno ULg; Parmentier, Eric ULg et al

Poster (2005, October)

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See detailPrévalence des calcifications vasculaires et facteurs associés chez le patient hémodialysé
XHIGNESSE, Patricia ULg; Saint-Remy, Annie ULg; WEEKERS, Laurent ULg et al

Poster (2005, September 27)

Les maladies cardiovasculaires constituent la première cause de décès chez les patients dialysés chroniques. Parmi les facteurs impliqués on trouve les anomalies du métabolisme phosphocalcique. Le but de ... [more ▼]

Les maladies cardiovasculaires constituent la première cause de décès chez les patients dialysés chroniques. Parmi les facteurs impliqués on trouve les anomalies du métabolisme phosphocalcique. Le but de cette étude est de relier l'incidence de nouvelles calcifications et des décès (22%, n=18) avec les paramètres du métabolisme phosphocalcique au travers d'une étude prospective portant sur les années 2003-2004. L'établissement d'un score de calcification vasculaire précoce (dès la prise en charge en dialyse) permettra un suivi étroit et une adaptation prudente du traitement contrôlant le métaboisme phosphocalcique. [less ▲]

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See detailAmputation des membres inférieurs, diabète et survie chez le patient dialysé chronique
sumaili, Ernest; Saint-Remy, Annie ULg; DUBOIS, Bernard ULg et al

Poster (2005, September 27)

Chez les patients HD, la mortalité après amputation est importante (83%). La période critique post opératoire est de 2 mois avec une médiane de survie d'environ 1 an. Le diabète et les troubles ... [more ▼]

Chez les patients HD, la mortalité après amputation est importante (83%). La période critique post opératoire est de 2 mois avec une médiane de survie d'environ 1 an. Le diabète et les troubles phosphocalciques sont en relation avec la nécessité d'amputation et la survie médiocre chez des patients ayant de lourds antécédents cv. Une optimalisation de la prise en charge thérapeutique de ces patients à risque est nécessaire. [less ▲]

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See detailProduction de xérogels de carbone hyperporeux par séchage convectif
Léonard, Angélique ULg; Job, Nathalie ULg; Jomaa, W. et al

Poster (2005, September 20)

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See detailUtilización de p24 recombinante para la optimización de un ELISA para detectar anticuerpos anti-BLV en suero
Gutiérrez, G.; Álvarez, I.; Rodriguez, Sabrina ULg et al

Poster (2005, September 19)

Utilización de p24 recombinante para la optimización de un ELISA para detectar anticuerpos anti-BLV en suero. Gutierrez, G.; Alvarez, I.; Rodríguez, S. y Trono, K. Instituto de Virología. CICVyA. INTA ... [more ▼]

Utilización de p24 recombinante para la optimización de un ELISA para detectar anticuerpos anti-BLV en suero. Gutierrez, G.; Alvarez, I.; Rodríguez, S. y Trono, K. Instituto de Virología. CICVyA. INTA Cautelar. El gen completo que codifica para la proteína mayoritaria de la cápside del Virus de la leucosis bovina (BLV), p24, fue amplificado y clonado en un vector de expresión para E.coli. La proteína p24 recombinante (p24r) expresada fue caracterizada por Western blot utilizando un suero monoclonal y un suero policlonal de referencia, demostrando ser altamente específica y no reconocida por sueros de animales no infectados. La proteína fusionada a un tag de histidina fue purificada y utilizada como antígeno de ELISA para detectar anticuerpos anti-BLV en muestras individuales de suero bovino. La metodología fue optimizada en sus diferentes parámetros de uso como solución bloqueante, temperatura y tiempo de incubación, dilución de suero, fase sólida y sustrato colorimétrico; y se desarrolló a partir de estos resultados un ensayo de ELISA indirecto (ELISAp24r) que fue comparado con la prueba oficial de Inmunodifusión en gel de agar (IDGA) y un ELISA indirecto previamente validado, que utilizan como antígeno BLV completo semi-purificado obtenido de un cultivo celular persistentemente infectado. El ensayo comparativo demostró que de 91 sueros positivos por IDGA, 87 resultaron positivos por ELISAp24r. Asimismo, de un total de 184 sueros negativos por IDGA, 179 resultaron negativos por ELISA recombinante. El análisis comparativo mostró un índice de concordancia muy bueno con la prueba oficial de uso actual (IDGA). El ELISAp24r demostró ser una herramienta útil y fácil de aplicar para el diagnóstico de BLV sobre un gran número de muestras, y además posee una ventaja comparativa económica debido al bajo costo de producción y purificación del antígeno p24r en comparación con la producción del mismo a partir de cultivos celulares. [less ▲]

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See detailMultiplication by a Constant and Recognizability in an Abstract Numeration System
Charlier, Emilie ULg

Poster (2005, September 12)

One of the main interesting concerns in work about numeration systems is studying the relationship that exist between arithmetic properties of numbers and syntactical properties of their representation ... [more ▼]

One of the main interesting concerns in work about numeration systems is studying the relationship that exist between arithmetic properties of numbers and syntactical properties of their representation. More precisely, we prefer to manipulate set of numbers whose representations are characterized by very simple syntactical rules, that is, forming a regular language. Such sets are called S-recognizable sets, where S is the numeration system we are working with. In particular, we would like to obtain numeration systems in which the whole set N is recognizable, partly due to the fact that, if the set of representations of all integers is regular, there are very simple algorithms making it possible to decide if a word stands or does not stand for a number. Some general questions in this area are the following. • Characterization of the recognizable parts in a fixed numeration system. • Determination of the numeration systems for which a given set of numbers is recognizable. • To examine the stability of recognizability under arithmetic operations. In this poster we present our research about that last problem. First, we will define the abstract numeration systems based on a regular language. Then we will study the relationship between multiplication by a constant and the S-recognizability for languages of the type a_1^∗ . . . a_k^∗. [less ▲]

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See detailUltraviolet Spectroscopy of Saturn: Determination of Auroral characteristics with FUSE, STIS and UVIS Spectra
Gustin, Jacques ULg; Gérard, Jean-Claude ULg; Feldman, P. D. et al

Poster (2005, September 01)

Ultraviolet (UV) lines from Saturn's aurorae are emitted following inelastic collisions between energetic electrons and H[SUB]2[/SUB] molecules. De-excitation by radiative process lead to Far Ultraviolet ... [more ▼]

Ultraviolet (UV) lines from Saturn's aurorae are emitted following inelastic collisions between energetic electrons and H[SUB]2[/SUB] molecules. De-excitation by radiative process lead to Far Ultraviolet (FUV) and Extreme Ultraviolet (EUV) emissions in the 750-1750 Å spectral window. Low resolution spectra ( 12 Å) obtained with HST/STIS in the 900-1700 Å window are employed to derive the absorption of the auroral photons by hydrocarbons (mainly methane) and depth of the auroral energy deposition. Determination of H[SUB]2[/SUB] temperature and overlying H[SUB]2[/SUB] column is achieved by analyzing spectra obtained with the FUSE instrument ( 0.2 Å resolution with the LWRS aperture in the 900-1200 Å spectral window). Below 1100 Å, transitions connecting to the v" = 0 and 1 levels of ground-state H[SUB]2[/SUB] are partially or totally absorbed by ambient H[SUB]2[/SUB] (self-absorption). Comparisons between observed and synthetic spectra allow to derive the gaz temperature and the overlying H[SUB]2[/SUB] column, which is an indicator of the depth of the aurora, hence of the energy of the precipitated electrons. Auroral spectra of Saturn at 12 Å resolution were also obtained with Cassini's Ultraviolet Imaging Spectrograph (UVIS), both in the EUV and FUV spectral bands. While the spectral resolution of UVIS is too low to estimate temperatures, the coverage of the entire UV domain allows to determine the energy of precipitated particles through the quantification of the methane and molecular hydrogen columns. Results from observations with these three instruments are presented and compared in order to characterize the auroral atmosphere and auroral electrons precipitated from Saturn's magnetosphere. [less ▲]

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See detailKilling kinetics of clinical isolates of group B streptococci isolated in Belgium for penicillin alone or in combination with gentamicin
MELIN, Pierrette ULg; Lorquet, Sophie; HAYETTE, Marie-Pierre ULg et al

Poster (2005, September)

BACKGROUND: Associated with high morbidity and mortality, severe GBS infections should be treated with antimicrobial agents alone or in combination characterized by both a good diffusion at the site of ... [more ▼]

BACKGROUND: Associated with high morbidity and mortality, severe GBS infections should be treated with antimicrobial agents alone or in combination characterized by both a good diffusion at the site of infection and a short bactericidal lag time. Penicillin (P) or another blactam used in combination with an aminoglycoside is usually recommended to start the therapy. MICs to gentamicin (G) of GBS recently isolated in Belgium range from 16 to 256 mg/L (> or = MICs of E.faecalis with low level resistance to G, LLR). OBJECTIVES: To investigate in vitro, the potential synergism of P+G on strains of GBS isolated in Belgium. METHODS: According to Etest-AB Biodisk original procedures, for 6 Belgian strains of GBS (G MICs: 16-128 mg/L), we investigated the potential synergism, MICs and time killing curves, between P and G (ratio1:1). In the killing kinetic assays, surviving organisms were enumerated initially and repeatedly after 2, 4, 8 and 20 hours (T2, T4, T8 and T20) at concentrations of P equal to 4 and 16x MICs. Two strains of E.faecalis (1 HighLR and 1 LLR to G) were used as negative and positive control. Each isolate was tested twice. RESULTS: For GBS the P MICs in the combination were within +/- 1 dilution compared with single drug. As expected, P+G produced enhanced killing at T2 and T4 compared with P alone for G LLR E.faecalis and there was no difference for the G HLR E.faecalis. On the contrary, no accelerated killing was observed for any GBS isolate with the combination even for a concentration of 16xMIC of P; moreover for 3 isolates a reduced killing was observed at T2 in the combination tests compared with P alone. CONCLUSION: This limited in vitro testing of the combination P+G compared with P alone for Belgian GBS isolates did not show any synergism or accelerated killing. Moreover the killing was reduced at T2 for half of the isolates. Further evaluation should be performed on these strains with other ratio or other b-lactams as ampicillin in combination with G. [less ▲]

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See detailPrenatal development study of rat Corti organ at the morphological level
Thelen, Nicolas ULg; Malgrange, Brigitte; Thiry, Marc ULg

Poster (2005, September)

Although the structural organization of the mature Corti organ is generally well defined, little is known about its prenatal development. Here, we have examined by photonic and electron transmission ... [more ▼]

Although the structural organization of the mature Corti organ is generally well defined, little is known about its prenatal development. Here, we have examined by photonic and electron transmission microscopies the morphological changes occurring in the cochlear epithelium from the embryonic day 16 to 19 in rat. <br />At the embryonic day 16 (E16), whatever the region of the cochlear studied (base, medium, apex), the organ of Corti is not present. The cochlear epithelium appears as a pseudostratified epithelial tissue formed by two distinct regions according to the staining of the cells : a pale region on the striolar side of the cochlear canal and a darker region on the modiolar side. At E17, it appears in the basal and medium cells of the cochlear epithelium, at the transition between the pale and the dark one, a cell visible on the whole height of the epithelium. By electron microscopy, we also show that this cell has a rich content in glycogen, a characteristic reminiscent to pillar cells. These results suggest that the first differentiating cell in the cochlear epithelium could be a pillar cell. At E18, in the majority of sections realized at the base and medium of the cochlear canal, the organ of Corti is relatively well recognizable. We distinguish principally the inner hair cells but also to a lesser extent the outer hair cells as well as the supporting cells (pillar, phalengeal and Deiters cells). At E19, the organ of Corti is clearly recognizable in all the basal and medium cells. By contrast, it is yet differenciated at the apex. <br />These data seem to indicate that the Corti organ in rat develops from base to apex starting by the pillar cells. [less ▲]

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