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See detailPlusieurs épidémies de fièvre hémorragique due au virus Ebola au Gabon, d'octobre 2001 à avril 2002
Nkoghe Mba, Dieudonne ULg; Formenty, P; Leroy, E M et al

in Bulletin de la Société de Pathologie Exotique (2005), 98(3), 224-229

Des épidémies de fièvre hémorragique virale à virus Ebola (FHVE) ont été rapportées de 1994 à 1996 dans la province de l’Ogooué Ivindo, une zone forestière située au Nord Est du Gabon. Chaque fois, les ... [more ▼]

Des épidémies de fièvre hémorragique virale à virus Ebola (FHVE) ont été rapportées de 1994 à 1996 dans la province de l’Ogooué Ivindo, une zone forestière située au Nord Est du Gabon. Chaque fois, les grands primates avaient été reconnus comme la source initiale de l’infection humaine. Fin novembre 2001 une nouvelle alerte est venue de cette province qui a rapidement était confirmée comme étant une épidémie de FHVE. La riposte a été organisée par le ministère de la santé publique avec l’aide d’une équipe internationale sous l’égide de l’OMS. Un système de surveillance active a été mis en place dans les trois districts touchés par l’épidémie (Zadié, Ivindo and Mpassa) afin d’organiser la détection des cas et le suivi de leur contacts. Une définition de cas a été adoptée, les cas suspects étaient isolés à l’hôpital, à domicile ou dans des lazarets, et des tests sérologiques étaient réalisés. Ces tests comportaient la détection de l’antigène ou des IgG spécifiques, et la RT-PCR. Un classement des cas était réalisé en fonction des résultats des tests biologiques et des données cliniques et épidémiologiques. Les sujets contacts étaient surveillés durant 21 jours. On a dénombré 65 cas dont 53 décès. Le premier cas humain, un chasseur, était décédé le 28 octobre 2001. L’épidémie s’est propagée grâce une transmission familiale et une contamination nosocomiale. Quatre foyers primaires distincts ont été mis en évidence ainsi qu’un cas isolé situé dans le Sud est du Gabon, à 580 km de l’épicentre, Les décès sont survenus dans un délai de 6 jours. Le dernier décès a été enregistré le 22 mars 2002 et la fin de l’épidémie déclarée le 6 mai 2002. L’épidémie s’est étendue au Congo voisin. Des morts inexpliquées d’animaux avaient été signalées dans les forêts environnantes dès le mois d’août 2001 : des grands primates et des céphalophes. Les prélèvements réalisés sur leurs carcasses confirmaient une épidémie animale concomitante. [less ▲]

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See detailVortex-antivortex dynamics and field-polarity-dependent flux creep in hybrid superconductor/ferromagnet nanostructures
Lange, M.; Van Bael, M. J.; Silhanek, Alejandro ULg et al

in Physical Review. B : Condensed Matter (2005), 72(5),

Vortex-antivortex arrays (VAA) that are created in a type-II superconducting film by lattices of ferromagnetic dots with perpendicular anisotropy have been investigated. The highest critical current is ... [more ▼]

Vortex-antivortex arrays (VAA) that are created in a type-II superconducting film by lattices of ferromagnetic dots with perpendicular anisotropy have been investigated. The highest critical current is shifted to a nonzero value of the applied field, and current-voltage characteristics show different regimes of vortex motion even in zero-applied field due to the presence of the VAA. Creep of interstitial vortices is observed at low driving forces. This flux creep is strongly field-polarity dependent. [less ▲]

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See detailBringing animal welfare into public debate
Lamine, Claire; Stassart, Pierre M ULg

in Environment, knowledge and democracy” University of the Mediteranean (2005)

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See detailRestrictieve focuspartikels in het Nederlands: enkel en uitsluitend en alleen (maar) problemen voor Franstaligen?
Meesters, Gert ULg

in Hiligsmann, Philippe; Beheydt, Ludo; Degand, Liesbeth (Eds.) et al Neerlandistiek in Frankrijk en in Franstalig België / Les études néerlandaises en France et en Belgique francophone (2005)

Dans cet article, il est question des différentes particules qui permettent au néerlandophone de mettre une partie de la phrase en évidence et d'exprimer en même temps une limitation. Il s'agit des ... [more ▼]

Dans cet article, il est question des différentes particules qui permettent au néerlandophone de mettre une partie de la phrase en évidence et d'exprimer en même temps une limitation. Il s'agit des particules synonymes alleen, maar, alleen maar, slechts, enkel, louter, uitsluitend. Après une brève introduction au monde des particules et l'analyse de quelques phrases rédigées par des francophones qui apprennent le néerlandais, il sera démontré qu'il n'est pas évident, même pour des néerlandophones, de savoir si une particule est utilisée correctement ou non. Des recherches dans des corpus de textes pourront aider à trouver une solution à ce problème. Au moyen de recherches dans un corpus de textes bien structuré, il sera possible de découvrir des caractéristiques sémantiques, syntaxiques ainsi que des caractéristiques de variation stylistique et régionale qui distinguent ces particules quasi synonymes. Les résultats de ces recherches seront utiles à la didactique du néerlandais langue étrangère en ce qui concerne les particules. [less ▲]

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See detailReconstruction of incomplete oceanographic data sets using empirical orthogonal functions: application to the Adriatic Sea surface temperature
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Rixen, Michel et al

in Ocean Modelling (2005), 9(4), 325-346

A method for the reconstruction of missing data based on an EOF decomposition has been applied to a large data set, a test case of Sea Surface Temperature satellite images of the Adriatic Sea. The EOF ... [more ▼]

A method for the reconstruction of missing data based on an EOF decomposition has been applied to a large data set, a test case of Sea Surface Temperature satellite images of the Adriatic Sea. The EOF decomposition is realised with a Lanczos method, which allows optimising computational time for large matrices. The results show that the reconstruction method leads to accurate reconstructions as well as a low cpu time when dealing with realistic cases. The method has been tested with different amounts of missing data, artificially adding clouds ranging from 40% to 80% of data loss, and then compared to the same data set with no missing data. A comparison with in situ data has also been made. These validation studies show that results are robust, even when the amount of missing data is very high. The reconstruction of the data from the Adriatic Sea shows realistic features and a reliable temperature distribution. In addition, the method is compared to an Optimal Interpolation reconstruction. The results obtained with both methods are very similar. The main difference is the computational time, which is reduced nearly 30 times with the method presented here. Once the reconstruction has been performed, the EOF decomposition is analysed to show the method's reliability, and a cold event on the Albanian coast is studied. The reconstructed data reflect the effect of wind on the Albanian coast, that led to a cold-water episode in this zone for a 6-day period. (c) 2004 Elsevier Ltd. All rights reserved. [less ▲]

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See detailStructure of light and heavy pentaquarks
Stancu, Floarea ULg

in International Journal of Modern Physics A : Particles & Fields, Gravitation, Cosmology, Nuclear Physics (2005), 20(8-9), 1797-1802

Light and heavy pentaquarks are described within a constituent quark model based on a spin-flavor hyperfine interaction. In this model the lowest state acquires positive parity. The masses of the light ... [more ▼]

Light and heavy pentaquarks are described within a constituent quark model based on a spin-flavor hyperfine interaction. In this model the lowest state acquires positive parity. The masses of the light antidecuplet members are calculated dynamically using a variational method. It is shown that the octet and antidecuplet states with the same quantum numbers mix ideally due to SU (3)(F) breaking. Masses of the charmed antisextet pentaquarks are predicted within the same model. [less ▲]

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See detailThe discovery and properties of pentaquarks
Stancu, Floarea ULg

in International Journal of Modern Physics A : Particles & Fields, Gravitation, Cosmology, Nuclear Physics (2005), 20(2-3), 209-218

The pentaquarks are exotic baryons formed of four quarks and an antiquarks. Their existence has been discussed in the literature over the last 30 years or more, first in connection with kaon nucleon ... [more ▼]

The pentaquarks are exotic baryons formed of four quarks and an antiquarks. Their existence has been discussed in the literature over the last 30 years or more, first in connection with kaon nucleon scattering data. The subject has been revived by the end of 2002 when experimental evidence of a narrow baryon of strangeness S = +1, and mass M similar or equal to 1530 MeV has been found. This is interpreted as the lightest member of an SU(3)-flavor antidecuplet. Here we shall mainly review the predictions of pentaquark properties as e.g. mass, spin and parity, within constituent quark models. Both light and heavy pentaquarks will be presented. [less ▲]

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See detailRecent Evolution of atmospheric OCS above the Jungfraujoch station : implications for the stratospheric aerosol layer.
Mahieu, Emmanuel ULg; Zander, Rodolphe ULg; Demoulin, Philippe ULg et al

in Proceedings of the Atmospheric Spectroscopy Applications. (2005)

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See detailLa force du mi-dit : Figures de style dans le roman de Lawrence Scott, Witchbroom
Pagnoulle, Christine ULg

in Palimpsestes (2005), 16

Beyond some obvious comparisons, the article traces the function of some embedded metaphors, and the kind of problem they may raise in a translation.

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See detailComparaison de quatre variétés de blé d’hiver : effets de différents critères physico-chimiques sur les performances zootechniques du poulet
Piron, Fabien ULg; Beckers, Yves ULg; Ounissi, Kamel et al

in Journées de la Recherche Avicole (2005)

This study investigated the influence of some physic and chemical parameters of wheat grains on the performances of broilers (Ross). Four varieties (Agami, Corvus, Folio et Meunier) were grown on a single ... [more ▼]

This study investigated the influence of some physic and chemical parameters of wheat grains on the performances of broilers (Ross). Four varieties (Agami, Corvus, Folio et Meunier) were grown on a single site in harvest year 2003. This cultivar samples are ground and included in starter (57.6 % of wheat) and growth diets (61.4 % of wheat). Broiler’s intake was not influenced (p > 0.05, n = 24) by varieties. But weights of chicken (38 days) were (p < 0.05, n = 516) higher with Folio and Meunier. Feed conversion ratios cumulated between day 3 to day 38 (FCR) were (p < 0.05, n = 24) lower with Folio and Meunier than with Corvus and Agami. Hardness was negatively correlated with FCR (r = - 0.60, p < 0.01, n = 4). The correlation between crude proteins and FCR was equal to - 0.70 (p < 0.001, n = 4). FCR was negatively correlated to Zeleny’s index (r = - 0.62, p < 0.01, n = 4), wet (r = - 0.66, p < 0.001, n = 4) and dry gluten (r = - 0.51, p < 0.05, n = 4). FCR was negatively correlated to ratio of large (> 1800 μm) particles in ground wheat (r = - 0.48, p < 0.05, n = 4) and also related to small (< 707 μm) material (r = 0.53, p < 0.01, n = 4). Surprisingly, FCR was negatively correlated with amounts of soluble Non-Starch Polysaccharides and soluble Arabinoxylans. The same pathway was observed with in vitro viscosity data. Intestinal viscosities were not related (p > 0.05, n = 24) to broiler’s performances. [less ▲]

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See detailDefinition of quality standards applicable to the purification and the expansion of mesenchymal stem cells for their use in haematopoietic, immunosuppressive and regenerative cellular therapy
Briquet, Alexandra ULg

Master of advanced studies dissertation (2005)

Mesenchymal stem cells (MSCs) reside within the stromal compartment of bone marrow and represent a plastic cell population for which pro-haematopoietic, immunosuppressive and regenerative properties are ... [more ▼]

Mesenchymal stem cells (MSCs) reside within the stromal compartment of bone marrow and represent a plastic cell population for which pro-haematopoietic, immunosuppressive and regenerative properties are poorly characterized. A characterization of MSC preparations was carried out with each passage in MSCGM or α-MEM + 20% FBS expansion media. We obtained 3 times more cells after 5 passages in MSCGM than in α-MEM + 20% FBS. We analysed the phenotype of MSCs after each passage by flow cytometry. At all passages and in both media cells were tested negative for CD45, strongly positive for CD73 and CD90 antigens and weakly positive for CD105 and CD106 antigens. We wanted to assess the MSC ability to differentiate into adipocytes, osteoblasts and chondroblasts. At all tested passages and in both media, MSCs differentiated in these three tissues when they were placed in the adequate induction medium. We used RayBio® Human Cytokine Antibody Array to analyse the presence of several cytokines in MSC-conditioned medium. At all passages and in both media, IL-6, IL-8 and VCAM-1 were more strongly expressed than the other cytokines. We used the CFU-F assay to evaluate the frequency and purity of MSCs in culture. We observed that CFU-F number reached a maximum at passages 3 and 4 after expansion in both MSCGM and in α-MEM + 20% FBS. We also observed a greater proportion of CFU-F for the cells expanded in MSCGM compared to the cells expanded in α-MEM + 20% FBS. To assess the haematopoietic supporting ability of MSCs, long term cultures were performed. We observed more colony-forming cells when long-term cultures were done with 1st and 2nd passages MSCs than when cultures were done with 3rd, 4th and 5th passages MSCs. In NOD/SCID mice we transplanted CD34+ uncultured cells or the expansion product of CD34+ cells co-cultured for one week with MSCs. Human chimerism was present in all conditions. We observed a greater human chimerism when CD34+ cells were co-cultured with MSCs from passage 4 than in the other conditions. In all conditions simultaneous expression of CD19 or CD33 antigens on human CD45+ cells demonstrated the presence of repopulating cells with lympho-myeloid potential. Despite the fact that MSCs had the same phenotype, differentiation potential and cytokine secretion profile at each passage and in both media, MSCs did have neither the same capacity to form CFU-F nor the same capacity to support haematopoiesis in vitro and in vivo. [less ▲]

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See detailLes hyperpaysages - Comment percevoir, interpréter et exprimer la complexité des sociétés derrière les paysages ?
Partoune, Christine ULg; Ericx, Michel

in Bulletin de la Société Géographique de Liège (2005), 45

The design of a landscape’s virtual tour starting from an interactive panoramic image (hyperlandscape) can become a way to develop and express a glance and a speech on the landscape integrating certain ... [more ▼]

The design of a landscape’s virtual tour starting from an interactive panoramic image (hyperlandscape) can become a way to develop and express a glance and a speech on the landscape integrating certain principles of the complex thought. In complement of discovery activities and field works appropriate to this objective, the design of a virtual structure of the space on combinative mode would put into our mind some dynamic mental maps for organizing our thoughts. These mental maps could constitute metaphors which would be used as support for structuring our perceptions and thought starting from a systemic groundwork. [less ▲]

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See detailAtelier 2 : Hyperpaysages
Partoune, Christine ULg; Ericx, Michel

in Bulletin de la Société Géographique de Liège (2005), 45

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See detailSome effects of limestone fillers as a partial substitute for cement in mortar composition
Courard, Luc ULg; Degeimbre, Robert ULg; Darimont, Anne ULg et al

in Banthia, N. (Ed.) Third International Conference on construction materials: performance, innovations and structural implications (2005)

Limestone filler is a raw material that is already used in several applications like paints, bricks, bituminous mixes, … Moreover, and particularly in Belgium, classical additions like fly ashes and blast ... [more ▼]

Limestone filler is a raw material that is already used in several applications like paints, bricks, bituminous mixes, … Moreover, and particularly in Belgium, classical additions like fly ashes and blast furnace slags become rare. There is a need for new additions that could have a positive effect on the properties of the fresh and hardened cementitous composites. Substitution of limestone filler in Portland cement and blast furnace slag cement has been realized between 15 and 30% in mass. In addition to the characterization of the powder itself – specific mass, specific surface and laser granulometry – the problem of the water demand has been analysed: it seems that it remains constant with the substitution rate. Electric conductivity has also been performed in order to study the evolution of the “dormant” period. Tests on hardened mortars concerned the mechanical properties, the evolution of the porosity and the durability. The K factor indicates a higher value and the porosity seems to be better in the case of blast furnace slags cements, partially due to a very low diameter of the slags particles. Oxygen permeability doesn’t seem to be influenced by the filler while capillary absorption increases with substitution rate. Finally, chloride penetration, sulphate resistance and carbonation rate show quite interesting behaviours, leading to the conclusion that this material needs again more investigations in order to define optimum application conditions in cementitous matrixes [less ▲]

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See detailQualité de l'environnement versus qualité de l'offre en services dans les campagnes belges. Le bonheur est-il vraiment dans le pré ?
Schmitz, Serge ULg

in Fleuret, Sébastien (Ed.) Espaces, Qualité de vie et Bien-Etre (2005)

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See detailIntroduction aux paysages ordinaires.
Schmitz, Serge ULg

in Territoires, urbanisation et paysages (2005)

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See detailEquilibre musculaire agonistes / antagonistes de l’épaule : relation avec les performances de terrain
Forthomme, Bénédicte ULg; Forthomme, L.; Croisier, Jean-Louis ULg

in Actes du 2ème Colloque Médico-sportif « Entre laboratoire et terrain » (2005)

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See detailComment l'école s'adapte-t-elle à la diversité des élèves ?
Lafontaine, Dominique ULg

in Revue internationale d'éducation (2005), 40

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