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See detailAspects épidémiologiques liés à l’émergence du virus Schmallenberg
Saegerman, Claude ULg

Scientific conference (2012, February 17)

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See detailP.ParisBnF inv. Suppl. gr. 1385. Un nouveau papyrus homérique
Carlig, Nathan ULg

Scientific conference (2012, February 17)

Description, édition, identification et commentaire du P.ParisBnF inv. Suppl. gr. 1385 (inédit), conservé à la Bibliothèque nationale de France et contenant un passage de l'Iliade d'Homère, réunion avec ... [more ▼]

Description, édition, identification et commentaire du P.ParisBnF inv. Suppl. gr. 1385 (inédit), conservé à la Bibliothèque nationale de France et contenant un passage de l'Iliade d'Homère, réunion avec un autre fragment de papyrus provenant de la même entité bibliologique et présentation des outils de la papyrologie littéraire, notamment informatiques (Base de données Mertens-Pack³ et Leuven Database of Ancient Books). [less ▲]

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See detailContribution à l'étude des propriétés tensioactives et membranaires d'esters dérivés de la glycine bétaïne
Nsimba Zakanda, Francis ULg

Doctoral thesis (2012)

The objective of this doctoral research is to contribute to the study of surface active and membrane properties of esters derived from glycine betaine. In this context, esters of glycine betaine ... [more ▼]

The objective of this doctoral research is to contribute to the study of surface active and membrane properties of esters derived from glycine betaine. In this context, esters of glycine betaine (alkylbétaïnate chlorides: CnBC, n = 10-16) were obtained using a new synthetic methodology. Glycine betaine (activated by thionyl chloride) and the primary fatty alcohols were used as basic raw materials for the chemical synthesis of CnBC. Some parameters to optimize the synthesis were studied, such as the nature of the organic solvent, the temperature, the molar ratio of reactants and the concentration of the latter in the reaction medium. Next, the surface active and membrane properties of CnBC were characterized using several instrumental techniques such as Langmuir film balance, isothermal titration calorimetry, fluorescence spectrometry and zeta potential and particle size measurements. Hexadécylbétaïnate chloride (C16BC) was synthesized with better performance under the following conditions: absence of a catalyst/base, a solvent of medium polarity (2-methyl-2-butanol), a temperature of 45°C, a molar ratio of betainyl chloride/1-hexadecanol of 3/1 and a concentration of reactants of 0.132 mol/L. Decylbetainate chloride (C10BC) dodecylbetainate chloride (C12BC) and tetradecylbetainate chloride (C14BC) were obtained using the optimal conditions for the synthesis of C16BC. Concerning the interfacial organization of CnBC, C10BC and C12BC did not form insoluble monolayers at the air-water at 20°C compared to their counterparts, C14BC and C16BC. The study of the monolayer of C16BC in various conditions of the aqueous subphase showed that the pH and monovalent anions (OHˉ, Brˉ, NO3ˉ, ClO4ˉ) did not influence the behavior of the monolayer compared to that in water with Clˉ as counterion while the temperature beyond 25°C, the divalent anions (HPO42-, SO42-) and the ionic strength of sodium sulfate (Na2SO4) affected it in term of interfacial area occupation of the molecules. Interactions between CnBC and model membranes have shown that in water, CnBC, regardless of the length of the alkyl chain, have highly penetreted into the negatively charged lipid monolayers (dipalmitoylphosphatidylserine and dipalmitoylphosphatidic acid), whereas their penetration was average and low into monolayers formed by lipids with small polar head (dipalmitoylphosphatidylethanolamine and cholesterol, CHOL) and lipid with large polar head (palmitoyloleoylphosphatidylcholine, POPC), respectively. In salted buffer, the adsorption of C16BC at the air-water interface and onto the surfaces of the lipid monolayers was instantaneous, and in all cases, the penetrating power was above the presumed pressure of biological membranes. C16BC formed miscible and stable mixtures with POPC and sphingomyelin while an almost ideal behavior was observed for its mixtures with CHOL. An affinity of C16BC for the membrane bilayer containing CHOL was also observed. The adsorption of CnBC onto the surfaces of bilayers was alkyl chain-dependent. C10BC, C14BC and C16BC did not significantly perturbed membranes even at high surfactant concnetrations compared to C12BC that has highly perturbed membranes without solubilizing them. In all cases, particles of positive charge and larger than those of membrane bilayers prepared were formed in the presence of high amounts of CnBC. [less ▲]

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See detailChimie et Science des Matériaux à l'Université de Liège
Léonard, Grégoire ULg

Conference given outside the academic context (2012)

Présentation du métier d'ingénieur en chimie et science des matériaux à des étudiants de secondaire.

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See detailComment organiser une armée à la fin du Moyen Âge ? La réponse bourguignonne
Masson, Christophe ULg

Conference given outside the academic context (2012)

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See detailIngénierie génétique d'une β2-intégrine LFA-1 bovine résistante à la leucotoxine de Mannheimia haemolytica
Fett, Thomas ULg

Doctoral thesis (2012)

Domesticated bovines are known since decades to be prone to bacterial pneumonias. Among the causative agents, a consensus emerged stating that Mannheimia haemolytica is the most frequent bacterium ... [more ▼]

Domesticated bovines are known since decades to be prone to bacterial pneumonias. Among the causative agents, a consensus emerged stating that Mannheimia haemolytica is the most frequent bacterium isolated from bovine lungs throughout the world. Moreover, it appeared that its virulence specifically targets ruminant lungs in vivo and ruminant leucocytes in vitro. When the thesis was started, the two main actors underlying this species-specific virulence were known: the leukotoxin (LKT) on the pathogen side and the beta2-integrin LFA-1 on the host side. The objective of the thesis was to contribute to the understanding of the LKT/LFA 1 interaction at the molecular level. Using a between-species perspective, we showed that (i) the CD11a subunit of the LFA-1 heterodimer was not involved in the LKT-specificity for ruminant LFA-1, (ii) the EGF-3 module within the CD18 controls the susceptibility of any given CD18 to LKT and (iii) a non cleavable signal peptide conjugated to a LKT susceptible EGF-3-containing CD18 exacerbates LKT pronecrotic effects. [less ▲]

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See detailDYSPHAGIE, DEGLUTITION ET ALIMENTATION
ALLEPAERTS, Sophie ULg; JAMAR, Marie-Cécile ULg; DELCOURT, Sandrine ULg et al

Conference (2012, February 16)

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Peer Reviewed
See detailA cognitive psychopathological approach to hallucinations
Laroi, Frank ULg

Conference (2012, February 16)

Detailed reference viewed: 45 (2 ULg)
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See detailIMONIC Spin-off Project
Goffin, Dorothée ULg

Speech/Talk (2012)

Présentation du projet de spin-off IMONIC à un jury de sélection

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See detailAuto-immunité en thyroïdologie et en gastro-entérologie
VALDES SOCIN, Hernan Gonzalo ULg; Beckers, Albert ULg

Conference (2012, February 16)

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See detailQuand un revenu est-il imposable?
Bourgeois, Marc ULg; Herve, Luc ULg

Scientific conference (2012, February 16)

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See detailVolumetric method of moments and conceptual multilevel building blocks for nanotopologies
Zheng, X.; Valev, V.K.; Verellen, N. et al

in IEEE Photonics Journal (2012), 4(1), 267-282

Based on the relationship between charge dimensionality and singular field behavior, it is proven that in a volumetric description of a volume current carrying topology, half rooftops of different binary ... [more ▼]

Based on the relationship between charge dimensionality and singular field behavior, it is proven that in a volumetric description of a volume current carrying topology, half rooftops of different binary hierarchical level are allowed without introducing numerical difficulties. This opens the possibility to use a very efficient multi-level hierarchical meshing scheme in a Volumetric Method of Moments (MoM) algorithm. The new meshing scheme is validated by numerical calculations and experiments. It paves the way towards a much more efficient use of MoM in the description of arbitrarily shaped nano-structures at IR and optical frequencies. [less ▲]

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See detailL'acidocétose diabétique: une complication à ne pas négliger.
RADERMECKER, Régis ULg

Conference given outside the academic context (2012)

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See detailImpact of glycerol and storage temperature on gluatathione concentration and physiological state of Pseudomonas fluorescens BTP1 freeze-dried
Mputu Kanyinda, Jean-Noël ULg; Pierart, C.; Delvigne, Frank ULg et al

Poster (2012, February 15)

Pseudomonas fluorescens is commonly used as bio-fungicides in agriculture. For this use it requires formulations as either liquid or powder. Formulations have two advantages, storage and transport. Freeze ... [more ▼]

Pseudomonas fluorescens is commonly used as bio-fungicides in agriculture. For this use it requires formulations as either liquid or powder. Formulations have two advantages, storage and transport. Freeze-drying is a commonly used method to preserve bacteria. However, freeze-drying damages the cells, which results in loss of viability. Protective compounds are used to reduce loss of viability during process (freeze-drying and storage). In our study we used flow cytometry analysis to assess the physiological state in which cells are at the end of freeze-drying and Glutathione (GSH) was measured before and during storage. [less ▲]

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See detailSémantique et enjeux politiques de la cité sainte kimbanguiste de Nkamba
Melice, Anne ULg

Scientific conference (2012, February 15)

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Peer Reviewed
See detailAbord crânio-facial des orbitopathies dysthyroidiennes
XHAUFLAIRE, Gaël ULg

in réflexions ophtalmologiques (2012), 17

La première description de chirurgie d’expansion orbitaire pour le traitement de l’orbitopathie dysthyroïdienne revient à Dollinger, en 1911 : il effondre la paroi externe de l’orbite par l’abord latéro ... [more ▼]

La première description de chirurgie d’expansion orbitaire pour le traitement de l’orbitopathie dysthyroïdienne revient à Dollinger, en 1911 : il effondre la paroi externe de l’orbite par l’abord latéro- orbitaire décrit antérieurement par Kronlein. Depuis 100 ans, de multiples techniques de décompression orbitaire ont été détaillées et comparées. Toutes les faces de la pyramide orbitaire ont été proposées à l’effondrement par tous les abords chirurgicaux possibles. Bien qu’aucun consensus strict ne soit défini, la tendance actuelle en chirurgie orbitaire, comme dans toute chirurgie, est à la petite incision. Ce dossier sur la chirurgie crânio-faciale est l’occasion de rappeler l’intérêt de l’abord coronal dans le traitement périorbitaire global de l’orbitopathie dysthyroïdienne. [less ▲]

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See detailRessources dans le rouge pour les technologies vertes ?
Pirard, Eric ULg

Conference given outside the academic context (2012)

Detailed reference viewed: 56 (10 ULg)