References of "Poster"
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Peer Reviewed
See detailWhole body barometric plethysmography measurements in dogs with brachycephalic airway obstructive syndrome
Bernaerts, Frederique ULg; Talavera, J.; Le Garrérès, Alain et al

Poster (2005, September)

Detailed reference viewed: 27 (4 ULg)
See detailControls on the oceanic CO2 sink near the Crozet Plateau in the Southern Ocean
Bakker, D; Nielsdottír, M.; Allen, J et al

Poster (2005, September)

Detailed reference viewed: 5 (0 ULg)
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Peer Reviewed
See detailAutobiographical remediation therapy in schizophrenia: results from an exploratory clinical training
Blairy, Sylvie ULg; Neumann, Aurore; Nachtergael, Hilde et al

Poster (2005, September)

Detailed reference viewed: 14 (1 ULg)
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See detailDiscrete optimization
Louveaux, Quentin ULg

Poster (2005, September)

Have you ever wondered what is the shortest route to join the office? What is the best way to plan a trip through several cities? You have maybe already played with magical squares? Then you have met one ... [more ▼]

Have you ever wondered what is the shortest route to join the office? What is the best way to plan a trip through several cities? You have maybe already played with magical squares? Then you have met one of the nu- merous instances of discrete optimization. Discrete optimization is a field of mathematics which deals with any problem where parts of the solutions cannot be divided or fractional. And as one may guess, this is the case in many real-life problems. This poster is divided in three main topics. The first part focuses on formulating those problems. We will start from one of the industrial appli- cations and show how we can model it as a mathematical problem. In the second part we sketch the main tools and algorithms used to tackle those problems. In particular we point out the fact that requiring integrality leads to extremely hard problems to solve. We show that despite this fact, we are able to solve problems of substantial size. However there remain some problems that are hard to solve using the state-of-the-art techniques. In the third part we indicate what are the chal- lenges of the field. In particular we will give an overview of the research car- ried out in the universities supported by the Marie-Curie network ADONET. [less ▲]

Detailed reference viewed: 18 (5 ULg)
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See detailMolecular sexing of Ursidae: application on extant and extinct brown bears
Pagès, Marie ULg; Maudet, Célia; Bellemain, Eva et al

Poster (2005, September)

Detailed reference viewed: 3 (0 ULg)
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Peer Reviewed
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 ▲]

Detailed reference viewed: 28 (3 ULg)
See detailMicrowave-assisted ruthenium-catalysed atom transfer radical reactions
Delfosse, Sébastien; Richel, Aurore ULg; Wei, H. et al

Poster (2005, August)

Detailed reference viewed: 14 (0 ULg)
Peer Reviewed
See detailStudy of metal regulation in Arabidopsis halleri, a model system to understand zinc homeostasis in plants
Hanikenne, Marc ULg; Talke, Ina N.; Galante, Carolina et al

Poster (2005, July 03)

Detailed reference viewed: 7 (1 ULg)
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See detailLiving radical polymerization under emulsion conditions
Szkurhan, K.; Chan-Seng, D.; Kasahara, T. et al

Poster (2005, July 03)

Detailed reference viewed: 8 (3 ULg)
Peer Reviewed
See detailScavenger amphipod crustaceans from Antarctic deep-sea: composition, distribution and ecofunctional role.
De Broyer, Claude; Nyssen, Fabienne; Dauby, Patrick ULg

Poster (2005, July)

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailThe major allergens in Russian atopic asthmatic patients.
Gusareva, Elena ULg; Bragina, Elena; Deeva, Evgenia et al

Poster (2005, July)

Detailed reference viewed: 21 (4 ULg)
See detailHistological study of equine interphalangeal joints
Toppets, Vinciane ULg; Pastoret, V.; Antoine, Nadine ULg et al

Poster (2005, July)

Detailed reference viewed: 10 (5 ULg)
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Peer Reviewed
See detailScreening of noble metal and transition metal oxide catalysts for the removal of VOCs, N-VOCs and S-VOCS
Cellier, Caroline; Lambert, Stéphanie ULg; Gaigneaux, Eric et al

Poster (2005, June 29)

Detailed reference viewed: 2 (0 ULg)
See detailFEEDING SELECTIVITY OF THE ROTIFER BRACHIONUS CALYCIFLORUS: EVIDENCE OF THE ROLE OF CHEMICAL CUES.
Joaquim-Justo, Célia ULg; Ayala-Andrés, N; Thomé, Jean-Pierre ULg

Poster (2005, June 19)

The rotifer Brachionus calyciflorus is a ubiquitous species that often dominates river zooplankton. It has been described as a species that selects its food mainly on the basis of the size of food ... [more ▼]

The rotifer Brachionus calyciflorus is a ubiquitous species that often dominates river zooplankton. It has been described as a species that selects its food mainly on the basis of the size of food particles and not on the basis of their taste. Nevertheless, experiments carried out with a green algae, 3,5 microns in diameter, showed that the ingestion rate of rotifers on DTAF (5-(4,6-dichlorotriazin-2-yl)aminofluorescein) stained algae is much lower than on untreated algae. The impact of all steps of the staining procedure was tested to determine the factor that elicits a negative selection against stained algae. Moreover, impact of algal abundance and light on selection was tested. Results clearly show the selection is triggered by chemical cues, DTAF itself inducing the strongest avoidance. Algal abundance influenced the degree of selectivity of rotifers; analysis of ingestion rate of treated and untreated algae throughout all treatments provide information on selection mechanisms and support the hypothesis that B. calyciflorus can detect chemical cues in the buccal funnel, even when feeding on small preys, and select its food accordingly. [less ▲]

Detailed reference viewed: 30 (1 ULg)
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See detailWhich peridialysis blood pressure best predicts interdialytic level?
Bataille, Yoann ULg; Saint-Remy, Annie ULg; Godon et al

Poster (2005, June 18)

Detailed reference viewed: 13 (1 ULg)
See detailBiosensors based on electrochemically prepared polyanilines
Halusiak, Emilie; Jérôme, Robert ULg; Jérôme, Christine ULg

Poster (2005, June 01)

Detailed reference viewed: 19 (3 ULg)
See detailABC triblock copolymers for pH sensitive micelles
Willet, Nicolas ULg; Gohy, Jean-François; Varshney, Sunil et al

Poster (2005, June 01)

Detailed reference viewed: 23 (4 ULg)
See detailSynthesis of novel functional PEO as builiding block for biomaterials
Rieger, Jutta ULg; Bernaerts, K.; Qiiu, Hongjin et al

Poster (2005, June 01)

Detailed reference viewed: 13 (2 ULg)
See detailSynthesis and foaming of polymer nanocomposites and microspheres in supercritical CO2
Urbanczyk, Laetitia ULg; Grignard, Bruno ULg; Stassin, Fabrice et al

Poster (2005, June 01)

Detailed reference viewed: 6 (2 ULg)
See detailSynthesis of polymer nanocomposites and microspheres in supercritical carbon CO2
Urbanczyk, Laetitia ULg; Grignard, Bruno ULg; Stassin, Fabrice et al

Poster (2005, June 01)

Detailed reference viewed: 13 (4 ULg)
See detailSynthesis and characterization of electrically conducting polyester/MWNTs nanocomposite foams
Garrais, Solange; Maquet, Véronique; Jérôme, Christine ULg et al

Poster (2005, June 01)

Detailed reference viewed: 28 (2 ULg)
See detailSynthesis and characterization of electrically conducting polyester foams
Maquet, Véronique; Gabriel, Sabine ULg; Garrais, Solange et al

Poster (2005, June 01)

Detailed reference viewed: 18 (2 ULg)
See detailSemi-crystalline polymer thin films: preparation, processing and peculiar features
Voccia, Samuel; Gilbert, Bernard ULg; Jérôme, Robert ULg et al

Poster (2005, June 01)

Detailed reference viewed: 17 (4 ULg)
Peer Reviewed
See detailInvestigation of the preparation and activity of gold catalysts in the total oxidation of n-hexane
Cellier Caroline; Lambert, Stéphanie ULg; Gaigneaux Eric et al

Poster (2005, June)

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailImplication of Peyer’s patches dendritic cells in prion diseases.
Dorban, G.; Defaweux, Valérie ULg; Demonceau, C. et al

Poster (2005, June)

Detailed reference viewed: 8 (1 ULg)
Peer Reviewed
See detailDetection and characterization of Vibrio parahaemolyticus in seafood using real time PCR.
Bradatan G; China B; Daube, Georges ULg

Poster (2005, June)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailFirst-Principles Study of High-Pressure Phase Transitions in Si3N4
Xu, Bin ULg; Dong, Jianjun

Poster (2005, June)

Detailed reference viewed: 21 (0 ULg)
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Peer Reviewed
See detailInfluence of residual alpha-amylase activity on the pasting properties of extracted wheat starch.
Lenartz, Jonathan; Sinnaeve, Georges; Massaux, Carine et al

Poster (2005, June)

Detailed reference viewed: 13 (0 ULg)
See detailLarge group teaching: the distance learning solution?
Pasleau, Françoise ULg; Doseray, Patrick; Fairon, Nicolas ULg et al

Poster (2005, June)

Problem-based learning has been introduced at the University of Liège for four years now. The medical library was committed with the organisation of different activities (60 hours/2 years), starting with ... [more ▼]

Problem-based learning has been introduced at the University of Liège for four years now. The medical library was committed with the organisation of different activities (60 hours/2 years), starting with the control of basic computer litteracy, continuing with an analysis of the structure of the different document types used for scientific communication as well as the discovery of both traditional and electronic medical libraries, to end with guidelines for information retrieval. Such courses requested new approaches and several difficulties had to be taken into consideration including : 1. The transfer of skills rather than kowledge. Some theoretical bases have to be taught before practicing. But the students mostly need to be challenged with different situations requesting different approaches of litterature searching. 2. The course is given before the students feel the need of it. The librarians enconter the students during the first semester of the second year before the students are asked to search the medical litterature to build their own knowledge about clinical matters. 3. The absence of motivation. Second year medical students are focused on major courses in basic and preclinical sciences. 4. Large group teaching (n ≥ 300). All the sections of the medical Faculty are concerned. 5. Inadequate logistic support. Small sized computer rooms do not allow the organization of very many parallel hand-on sessions. 6. Insufficient teaching staffs. Distance learning tools were used to develope online activities complementary to face to face teaching. They are focused on practice. Links to the theory are provided but only when they are indispensable. Many quizzes are also proposed in order to trigger critical mind and auto-evaluation. By January 2005, a first cycle will be completed from the beginning of the course to the final examination. We plan to survey students from every section in order to evaluate the impact of this new teaching strategy. Their observations will be reported as well as our conclusions and suggestions for possible improvements. [less ▲]

Detailed reference viewed: 58 (5 ULg)
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Peer Reviewed
See detailMovements and depth utilisation by the whithefish Coregonus lavaretus and Coregonus peled in a small artificial lake in eastern Belgium.
Ovidio, Michaël ULg; Legrain, Fanny; Prévost, Vincent et al

Poster (2005, June)

Using manual acoustic tracking our study quantified (1) the spatial distribution (2) the movement patterns and (3) the depth preference of adult whitefish in a small artificial lake of eastern Belgium ... [more ▼]

Using manual acoustic tracking our study quantified (1) the spatial distribution (2) the movement patterns and (3) the depth preference of adult whitefish in a small artificial lake of eastern Belgium were the species was introduced in 1978 for recreational fishing. From June to October 2004, n=6 C. lavaretus (LF 285-519 mm) were tracked (pingers and depth sensor transmitters) from a small boat over periods ranging from 98 to 108 days in Robertville Lake (elevation: 490 m; area: 63 ha; max. depth: 47 m). Whitefish were consistently mobile but showed quite variable lake use patterns. Two individuals traveled the entire length and breadth of the lake, whereas others remained in movement in the deep zone in the middle part of the lake or near the retaining dam wall. Whitefish occupied positions in the water column ranging from 2.6 to 27.0 m (mean 12.7 m ± 5.6 m) that varied depending on individuals. This first study on individual whitefish behaviour provides a better understanding of the behavioural ecology of the species in small artificial lake. [less ▲]

Detailed reference viewed: 24 (3 ULg)
Peer Reviewed
See detailSubacute effects of sertraline on attentional and executive functions in depression
Constant, Eric; Adam, Stéphane ULg; Gillain, B. et al

Poster (2005, May 31)

Detailed reference viewed: 9 (1 ULg)
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See detailSynthesis of new substituted poly(ε-caprolactone)s by comination of ring-opening polymerization, atom transfer radical addition and click reaction
Lecomte, Philippe ULg; Riva, Raphaël ULg; Schmeits, Stephanie ULg et al

Poster (2005, May 19)

During the last few years, a great research effort has been devoted to the synthesis of aliphatic polyesters, e.g. poly(ε-caprolactone) and polylactides. Indeed, their remarkable properties of ... [more ▼]

During the last few years, a great research effort has been devoted to the synthesis of aliphatic polyesters, e.g. poly(ε-caprolactone) and polylactides. Indeed, their remarkable properties of biodegradability and biocompatibility pave the way to many new applications in the biomedical field and as substitutes for non degradable polymers. In order to tailor the polyester properties, the grafting of functional groups along the polymer backbone is highly desirable. For the last few years, CERM has reported on the synthesis and the (co)polymerization of novel ε-caprolactones γ-substituted by various functional groups, e.g., ketal, ketone, olefin, protected alcohol and carboxylic acid. Nevertheless, the grafting of a specific functional group onto the aliphatic polyester backbone requires the synthesis of the parent substituted ε-caprolactone. There is accordingly a need for a strategy that would use a unique substituted ε-caprolactone, followed by derivatization by well-established reactions, so making available a wide range of pendent functional groups, polymeric or not. The derivatization reactions have however to be quantitative under mild conditions to prevent the aliphatic polyester from degrading. Moreover, these reactions must be compatible with the functional groups of interest, e.g., hydroxyl and carboxylic acid, in order to avoid the use of cumbersome protection/deprotection reactions. This communication aims at reporting that a-chloro-e caprolactone (αCLεCL) can be easily copolymerized with εCL into poly(αCLεCL-co-εCL) copolymers, which are precursors for various aliphatic polyesters, by using either Atom Transfer Radical Addition (ATRA) or Click reactions. The number of steps is limited whatever the "Click" or the "ATRA" strategy under consideration. In both cases, mild conditions have been found, such that degradation is minimized. Pendent hydroxyl, carboxylic acid and epoxide groups have been attached without using any protection/deprotection reaction. This strategy has been implemented for the synthesis of amphiphilic poly(εCL-g-ethylene oxide) graft copolymers, that have been used to prepare poly(D,L-lactide) nanoparticles for drug delivery applications. [less ▲]

Detailed reference viewed: 61 (15 ULg)
See detailSemi-crystalline polymer thin films: processing and peculiar features
Voccia, Samuel; Gilbert, Bernard ULg; Celle, C. et al

Poster (2005, May 19)

Detailed reference viewed: 13 (1 ULg)
Peer Reviewed
See detailRôle des erreurs et de la mémoire implicite dans l’efficacité de méthodes d’apprentissage appliquées dans la DTA en début d’évolution
Bier, Nathalie; Gagnon, Lise; Van der Linden, Martial et al

Poster (2005, May 12)

Detailed reference viewed: 15 (2 ULg)
See detailA novel strategy for the dispersion, selective deposition and decoration of carbon nanotubes
Detrembleur, Christophe ULg; Lou, Xudong; Stoffelbach, François et al

Poster (2005, May 11)

Detailed reference viewed: 11 (1 ULg)
See detailImpact of acid containing montmorillonite on the properties of sulfonated fuel cell membranes
Thomassin, Jean-Michel ULg; Pagnoulle, Christophe; Calderalla, G. et al

Poster (2005, May 11)

Detailed reference viewed: 5 (1 ULg)
See detailNanostructured polymeric materials with ultimate mechanical properties through reactive blending
Jérôme, Robert ULg; Koulic, Christian

Poster (2005, May 10)

Detailed reference viewed: 25 (2 ULg)
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See detailDissolved Inorganic Carbon dynamics in the northern Bay of Biscay during a Coccolithophore bloom
Harlay, Jérôme ULg; van der Zee, Claar; Schiettecatte, Laure-Sophie et al

Poster (2005, May 02)

In the framework of the Belgian global change programme, we have developed a project devoted to the study of the inorganic carbon cycle in the Bay of Biscay where coccolithophore blooms occur frequently ... [more ▼]

In the framework of the Belgian global change programme, we have developed a project devoted to the study of the inorganic carbon cycle in the Bay of Biscay where coccolithophore blooms occur frequently. The study focuses on processes associated with the oceanic production and dissolution of calcium carbonate and related CO2 fluxes. Real time remote sensing allowed to localize the coccolithophore bloom that the R.V. Belgica visited in June 2004 during a multidisciplinary scientific cruise. We will present vertical profiles of pH, Talk, along with other parameters (salinity, temperature, chlorophyll a and phaeopigments) and 14C incorporation experiments. Inorganic carbon fluxes will be discussed in the photic zone, in correlation with the biological activity of phytoplankton (biological and carbonate pumps). [less ▲]

Detailed reference viewed: 2 (0 ULg)
See detailGas Transfer Velocity as a critical variable in coastal ecosystem metabolism studies
Gazeau, F.; Gattuso, J.–P.; Frankignoulle, M. et al

Poster (2005, May)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailDéveloppement de modulateurs de la voie du thromboxane A2 en tant qu’agents anti-angiogéniques et anti-métastatiques
De Leval, X.; Dassesse, T.; Dogne, J. M. et al

Poster (2005, May)

Detailed reference viewed: 8 (1 ULg)
Peer Reviewed
See detailSynthesis and pharmacological effects of opened analogues of benzothiadiazine 1,1-dioxides with sulfonylurea moieties on diuresis and glycemia
Khelili, S.; Bouider, N.; Delarge, J. et al

Poster (2005, May)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailDo echinoderms store temperature changes in their skeleton?
Ranner, Herwig; Ladrière, Ophélie ULg; Navez, Jacques et al

Poster (2005, April 24)

Detailed reference viewed: 14 (1 ULg)
See detailBioencapsulated animal cell and biopolymers : preparation and applications in biomedical fields
Markvicheva, E; Svirshchevskay, E; Grandfils, Christian ULg et al

Poster (2005, April 03)

Detailed reference viewed: 8 (0 ULg)
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See detailApplication of Lempel-Ziv complexity to alignment-free sequence comparison of protein families
Bacha, Sofiène; Baurain, Denis ULg

Poster (2005, April)

Detailed reference viewed: 24 (3 ULg)
See detailPreliminary results on the biogeochemistry in the Mekong estuary and delta (Vietnam)
Borges, Alberto ULg; Koné; Schiettecatte, L. S. et al

Poster (2005, April)

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailInvestigation of germinal centres in vivo and in vitro in the context of prion disease
Demonceau, C.; Defaweux, Valérie ULg; Flandroy, S. et al

Poster (2005, April)

Detailed reference viewed: 7 (2 ULg)
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Peer Reviewed
See detailClonage de l’herpèsvirus alcélaphin 1 sous forme d’un chromosome artificiel bactérien infectieux
Dewals, Benjamin G ULg; Boudry, Christel; Markine-Goriaynoff, Nicolas et al

Poster (2005, April)

L’herpèsvirus alcélaphin 1 (AlHV-1) est un Gammaherpesvirinae du genre Rhadinovirus ayant pour hôte naturel le gnou (Connochaetes taurinus). Apathogène pour son hôte naturel, ce virus induit par ailleurs ... [more ▼]

L’herpèsvirus alcélaphin 1 (AlHV-1) est un Gammaherpesvirinae du genre Rhadinovirus ayant pour hôte naturel le gnou (Connochaetes taurinus). Apathogène pour son hôte naturel, ce virus induit par ailleurs une pathologie mortelle lorsqu’il est transmis à un grand nombre d’espèces de ruminants sensibles. Cette pathologie, appelée forme africaine du coryza gangreneux (FACG) est associée à une lymphoprolifération et une destruction des tissus de l’hôte infecté. Pour étudier le rôle de l’AlHV-1 dans la pathogenèse de la FACG, il est nécessaire de pouvoir manipuler le génome viral afin de générer des virus recombinants et révertants pour certains gènes. A ce jour, aucune souche d’AlHV-1 recombinante n’a pu être produite. Cette carence résulte du fait que ce virus est strictement associé aux cellules et qu’il possède la caractéristique de s’atténuer spontanément lors de sa multiplication in vitro. De ce fait, la réalisation de virus mutants se révèle impossible par une approche classique de recombinaison homologue en cellules eucaryotes. Récemment, le développement des technologies de chromosome artificiel bactérien (BAC) a permis de cloner le génome entier de plusieurs gammaherpèsvirus de manière stable en bactérie ainsi que la production rapide de nombreuses souches recombinantes. Dans la présente étude, nous avons cloné le génome entier de la souche C500 de l’AlHV-1 sous forme d’un BAC appelé ci-après BAC-AlHV-1. Les résultats obtenus peuvent se résumer comme suit : (i) le BAC-AlHV-1 permet une propagation stable du génome de l’AlHV-1 en bactérie ; (ii) la transfection du BAC-AlHV-1 en cellules eucaryotes permet de régénérer des particules virales infectieuses ; (iii) la cassette BAC insérée initialement dans le génome de l’AlHV-1 étant flanquée de séquences loxP, la multiplication des virions générés à partir du BAC-AlHV-1 en cellules EBL-Cre (embryonic bovine lung ; exprimant la Cre recombinase) permet l’excision de la cassette BAC ; (iv) enfin, la capacité des virions générés à partir du BAC à induire la FACG en modèle lapin a été démontrée. En conclusion, le clone BAC-AlHV-1 généré dans cette étude va enfin permettre l’étude des rôles des différents gènes de l’AlHV-1 dans la genèse de la FACG. [less ▲]

Detailed reference viewed: 45 (14 ULg)
Peer Reviewed
See detailApprentissage d’associations noms-visages dans la DTA en début d’évolution : comparaison de méthodes d’apprentissage
Bier, Nathalie; Gagnon, Lise; Van der Linden, Martial et al

Poster (2005, March 30)

Detailed reference viewed: 13 (2 ULg)
See detailFormulation solide de la lipase de Yarrowia lipolytica
Alloue, M.; Destain, Jacqueline ULg; Thonart, Philippe ULg

Poster (2005, March 05)

Detailed reference viewed: 3 (0 ULg)
See detailNatural and human-induced variability in the stoichiometry of benthic organisms in rivers
Darchambeau, François ULg; Campeau, Stéphane; Cabana, Gilbert

Poster (2005, March 03)

Detailed reference viewed: 5 (3 ULg)
See detailIron distribution in sea ice
Lannuzel, Delphine; De Jong, Johannes Jeroen; Schoemann, Véronique et al

Poster (2005, March)

Detailed reference viewed: 3 (0 ULg)
See detailEffect of aroma compounds on microorganisms
Waché, Y.; Gianotti, A.; Lanciotti, R. et al

Poster (2005, March)

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailPhylogeographical analysis of bovine herpesvirus 4: demonstration that inter strain recombination events took place after acquisition of the bo17 gene from an ancestor of the african buffalo
Dewals, Benjamin G ULg; Markine-Goriaynoff, Nicolas; de Fays, Kataline et al

Poster (2005, March)

Recently, our phylogenetic study revealed that the Bovine herpesvirus 4 (BoHV 4) Bo17 gene has been acquired from an ancestor of the African buffalo around 1.5 million years ago, implying that cattle ... [more ▼]

Recently, our phylogenetic study revealed that the Bovine herpesvirus 4 (BoHV 4) Bo17 gene has been acquired from an ancestor of the African buffalo around 1.5 million years ago, implying that cattle subsequently acquired BoHV 4 by cross species transmission (Markine-Goriaynoff et al., 2003, 77:1784-1792). In the present study, we pursued our investigation on the origin and the evolution of BoHV 4. Firstly, with the goal in mind to further precise the origin of the Bo17 gene, the C2GnT M gene sequence was determined for each subspecies of African buffalo and for three types of Asian buffalo. Phylogenetic analyses of these new sequences further supported our conclusion that the Bo17 gene has been acquired from an ancestor of the African buffalo, possibly of the Syncerus caffer caffer subspecies from East-Africa origin. Secondly, to investigate the phylogeographical relationships among BoHV-4 strains isolated from four different continents, phylogenetic analyses were performed based on six different regions distributed throughout the genome. Analyses of these regions revealed a clear correlation between the phylogenetic relationships among BoHV-4 strains and their geographical origin, leading to the concept of BoHV-4 geographical clades. These analyses also demonstrated that since the acquisition of the Bo17 gene, recombination events occurred at different time in the past between ancestors of actual geographical clades. These recombinations provided an opportunity to learn how after acquisition of the Bo17 gene in Africa around 1.5 million years ago, BoHV-4 has spread to the world to form phylogenetically related geographical clades. [less ▲]

Detailed reference viewed: 16 (2 ULg)
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See detailPolymeric microparticles with immobilized peptides. Preparation and application.
Stashevskaya, K; Markvicheva, E; Grandfils, Christian ULg et al

Poster (2005, February 07)

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailFollicular dendritic cells innervation within spleen of five mouse strains with different incubation periods after intraperitoneal BSE inoculation.
Demonceau, C.; Marshall, A.; Sales, J. et al

Poster (2005, February)

Detailed reference viewed: 13 (1 ULg)
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See detailFollicular dendritic cells related to nerve fibres and cellular prion protein expression in ileal and jejunal Peyer’s patches of cows and calves
Defaweux, Valérie ULg; Antoine, Nadine ULg; Dorban, G. et al

Poster (2005, February)

Prion pathogenesis following oral exposure is thought to involve gut-associated lymphoid tissue, which includes Peyer’s patches (PP). Before neuroinvasion, early accumulation of infectious prion protein ... [more ▼]

Prion pathogenesis following oral exposure is thought to involve gut-associated lymphoid tissue, which includes Peyer’s patches (PP). Before neuroinvasion, early accumulation of infectious prion protein (PrPsc) takes place on follicular dendritic cells (FDC) which are resident cells in germinal centres. The strain, the infection pathway and the lesions in the central nervous system are similar between bovine spongiform encephalopathy (BSE) and variant Creutzfeldt Jakob diseases. But in BSE, the agent tropism differs from lymphoid organs. Only bovine ileal PP are infectious. In order to study the replication and the possible ways of neuroinvasion of PrPsc in bovine PP, we studies the expression of cellular prion protein (PrPc), necessary for PrPsc accumulation, and compared the innervation of germinal centres related to FDC on ileal and jejunal PP of cows and calves. We performed classical immunoperoxydase staining and double immunofluorescence staining analyzed with a confocal microscopy. Differences in the innervation of germinal centres and expression of PrPc were evident. More contacts between FDC and nerve fibres are observed in calves PP. PrPc expression, carried out with different anti-PrPc antibodies, highlighted a heterogeneous labelling between calves and cows PP. Such results permit us to show that the innervation of PP is a dynamic process which could influence the first way of neuroinvasion in prion diseases. Moreover differences in the affinity of some antibody for PrPc allow us to postulate that PrPc glycoforms differ with age of bovines and thus could interfere with PrPsc tropism. [less ▲]

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