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See detailProfil isocinétique des fléchisseurs et extenseurs du coude
Maquet, Didier ULg; Croisier, Jean-Louis ULg; Forthomme, Bénédicte ULg et al

in Abstract book des 4èmes Journées Belges d’Isocinétisme (2003, October)

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See detailEvaluation d'une méthode de prédiction des déplacements de terminaux dans les réseaux mobiles
François, Jean-Marc; Leduc, Guy ULg; Martin, Sylvain ULg

in Ingénierie des protocoles - Réseaux mobiles et ad hoc, qualité de service, test et validation (2003, October)

Dans les réseaux mobiles, la prédiction du déplacement des terminaux fait régulièrement l'objet d'études: c'est une étape importante sur le chemin des garanties de QoS dans ces réseaux. Dans les ... [more ▼]

Dans les réseaux mobiles, la prédiction du déplacement des terminaux fait régulièrement l'objet d'études: c'est une étape importante sur le chemin des garanties de QoS dans ces réseaux. Dans les infrastructures actuelles, les sources d'informations permettant d'induire le déplacement d'un mobile sont multiples; de plus, le cas des terminaux incapables d'émettre de telles informations est aussi fréquent qu'important. Dans ces conditions, pour qu'un mécanisme de prédiction puisse se déployer, il lui faut pouvoir s'adapter à cette diversité de façon flexible. L'évaluation d'un tel mécanisme est le sujet de cet article; il s'agit d'une méthode simple et s'appuyant sur peu d'hypothèses. [less ▲]

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See detailReconnaissance des cultes : le projet d’accord de coopération concernant la reconnaissance des cultes, les traitements et pensions des ministres des cultes, les fabriques d'église et les établissements chargés de la gestion du temporel des cultes reconnus
Husson, Jean-François ULg

in Mouvement communal (2003)

Cet article dans Mouvement communal, périodique de l'Union des Villes et Communes de Wallonie, présente ce qui était alors le projet d'accord de coopération entre l'Etat fédéral et les trois Régions ... [more ▼]

Cet article dans Mouvement communal, périodique de l'Union des Villes et Communes de Wallonie, présente ce qui était alors le projet d'accord de coopération entre l'Etat fédéral et les trois Régions belges en matière de temporel des cultes. Cet accord de coopération, officiellement approuvé en 2004, mettait ainsi en oeuvre -en la clarifiant- la réforme de l'Etat de 2001. [less ▲]

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See detailLarge-scale modelling within the PIRENE programme in the Walloon Region of Belgium
Dassargues, Alain ULg

Scientific conference (2003, September 29)

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See detailStructural and functional adaptations to extreme temperatures in psychrophilic, mesophilic, and thermophilic DNA ligases
Georlette, D.; Damien, B.; Blaise, Vinciane ULg et al

in Journal of Biological Chemistry (2003), 278(39), 37015-37023

Psychrophiles, host of permanently cold habitats, display metabolic fluxes comparable to those exhibited by mesophilic organisms at moderate temperatures. These organisms have evolved by producing, among ... [more ▼]

Psychrophiles, host of permanently cold habitats, display metabolic fluxes comparable to those exhibited by mesophilic organisms at moderate temperatures. These organisms have evolved by producing, among other peculiarities, cold-active enzymes that have the properties to cope with the reduction of chemical reaction rates induced by low temperatures. The emerging picture suggests that these enzymes display a high catalytic efficiency at low temperatures through an improved flexibility of the structural components involved in the catalytic cycle, whereas other protein regions, if not implicated in catalysis, may be even more rigid than their mesophilic counterparts. In return, the increased flexibility leads to a decreased stability of psychrophilic enzymes. In order to gain further advances in the analysis of the activity/flexibility/stability concept, psychrophilic, mesophilic, and thermophilic DNA ligases have been compared by three-dimensional-modeling studies, as well as regards their activity, surface hydrophobicity, structural permeability, conformational stabilities, and irreversible thermal unfolding. These data show that the cold-adapted DNA ligase is characterized by an increased activity at low and moderate temperatures, an overall destabilization of the molecular edifice, especially at the active site, and a high conformational flexibility. The opposite trend is observed in the mesophilic and thermophilic counterparts, the latter being characterized by a reduced low temperature activity, high stability and reduced flexibility. These results strongly suggest a complex relationship between activity, flexibility and stability. In addition, they also indicate that in cold-adapted enzymes, the driving force for denaturation is a large entropy change. [less ▲]

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See detailLe nouveau conformisme
Durand, Pascal ULg

Article for general public (2003)

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See detailA field-based crop and land use map over Sanjiang plain in Heilongjiang derived from multi-temporal imagery of Landsat7-ETM+
Eerens, Herman; Dong, Qinghan; Ozer, Pierre ULg et al

in Cybergeo : Revue Européenne de Géographie = Cybergeo - European Journal of Geography (2003)

Multitemporal Landsat7-ETM+ imagery and supplementary field survey data were used to establish a crop and land use map for an area of ±20 000 km² of Sanjiang Plain in China’s north-eastern province ... [more ▼]

Multitemporal Landsat7-ETM+ imagery and supplementary field survey data were used to establish a crop and land use map for an area of ±20 000 km² of Sanjiang Plain in China’s north-eastern province Heilongjiang. The “field-based” map is based on data of the year 2002 and is created by combining the results of a supervised Maximum Likelihood classification with the estimated field boundaries extracted by an automatic segmentation procedure. No sufficient ground truth was available to perform an independent validation, and some classes are certainly confused. Nevertheless, given the minimal investments and the unexplored potentials for improvement, the approach seems very promising and cost-effective. By superimposing the classification with the map of the administrative counties, regional statistics were derived with the acreage distributions of the concerned crops and land use types. [less ▲]

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See detailnote sous arrêt du 18 septembre 2003, Volkswagen AG c/ Commission
Petit, Nicolas ULg

in Revue du Droit de l'Union Européenne (2003)

résumé et analyse de l'affaire Volkswagen AG contre Commission, affaire C-338/00

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See detailDialogue des cultures ? Civilisation universelle !
Legros, Willy ULg

Speech (2003)

Pérennisant le thème abordé par les conférenciers dans la première partie de la journée, le discours du Recteur Willy LEGROS était quant à lui axé sur le "Dialogue des cultures? Civilisation universelle ... [more ▼]

Pérennisant le thème abordé par les conférenciers dans la première partie de la journée, le discours du Recteur Willy LEGROS était quant à lui axé sur le "Dialogue des cultures? Civilisation universelle". Tout un chacun s'accorde sur le fait que l'homme fasse partie du monde, mais, derrière cette évidence, la vie des êtres humains se décline en une multitude de réalités qui se succèdent à tranvais le temps et dans l'espace. Elles se traduisent tant en théories qu'en pratiques diverses, plus souvent opposées que complémentaries. Le monde de l'un n'est pas le monde de l'autre. C'est une réalité de l'histoire et de la géographie. Et c'est bien là le problème. Cette source de diversité n'a jamais cessé d'être source de malentendus. Chaque groupe, chaque société, chaque interprétation du monde ont en effet rarement résisté à la facilité de se concevoir comme meilleurs, plus forts ou plus justes. Il en a régulièrement résulté des conflits, des tentatives de domination voire d'élimination des uns par les autres. [less ▲]

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See detailRole of the adaptor protein CIKS in the activation of the IKK complex
Mauro, Claudio; Vito, Pasquale; Mellone, Stefano et al

in Biochemical and Biophysical Research Communications (2003), 309(1), 84-90

Nuclear factor kappaB (NF-kappaB) plays a pivotal role in numerous cellular processes, including stress response, inflammation, and protection from apoptosis. Therefore, the activity of NF-kappaB needs to ... [more ▼]

Nuclear factor kappaB (NF-kappaB) plays a pivotal role in numerous cellular processes, including stress response, inflammation, and protection from apoptosis. Therefore, the activity of NF-kappaB needs to be tightly regulated. We have previously identified a novel gene, named CIKS (connection to IkappaB-kinase and SAPK), able to bind the regulatory sub-unit NEMO/IKKgamma and to activate NF-kappaB. Here, we demonstrate that CIKS forms homo-oligomers, interacts with NEMO/IKKgamma, and is recruited to the IKK-complex upon cell stimulation. In addition, we identified the regions of CIKS responsible for these functions. We found that the ability of CIKS to oligomerize, and to be recruited to the IKK-complex is not sufficient to activate the NF-kappaB In fact, a deletion mutant of CIKS able to oligomerize, to interact with NEMO/IKKgamma, and to be recruited to the IKK-complex does not activate NF-kappaB, suggesting that CIKS needs a second level of regulation to efficiently activate NF-kappaB. (C) 2003 Elsevier Inc. All rights reserved. [less ▲]

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See detailContribution à l’étude des peptides obliques impliqués dans des transconformations
Crowet, Jean-Marc ULg

Master's dissertation (2003)

The study of the amyloidogenic proteins is important to understand the transconformational processes. These proteins have a unique common feature : they undergo a conformational change leading to the ... [more ▼]

The study of the amyloidogenic proteins is important to understand the transconformational processes. These proteins have a unique common feature : they undergo a conformational change leading to the formation of highly structured fibrils that are mainly β conformed. These proteins are difficult to study experimentally due to their low solubility and their tendency to aggregate rapidly. Recently, tilted peptides have been detected in such proteins. These peptides are short fragments (11 to 18 residues) that adopt a tilted orientation when they interact with a hydrophilic/hydrophobic interface. This property is due to the presence of an asymmetric hydrophobicity gradient when they are helical. Those peptides are able to destabilize organized molecular systems. Amyloidogenic proteins containing such peptides are the PrP protein, the Aȕ peptide, and the bacterial prions Ure2p and Sup35p. The presence of such fragments in transconformational proteins has led to the hypothesis that tilted peptides could be implied in the conformational change of amyloidogenic proteins. These peptides could play a role through their destabilizing properties and/or their structural lability. The aim of this work was to detect tilted peptides among other amyloidogenic proteins by molecular modelling. One of the detected peptides is tested experimentally to evidence its lipid destabilizing properties. Five tilted peptides from four different proteins have been detected among 27 amyloidogenic proteins. The tilted fragment from the α-synuclein sequence, a protein involved in Parkinson disease, has been synthetized and tested for lipid fusion. The fusogenic assays pointed out its destabilizing properties. These results support the hypothesis that tilted peptides could be involved in transconformational processes. [less ▲]

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See detailLubrication by charged polymers
Raviv, Uri; Giasson, Suzanne; Kampf, Nir et al

in Nature (2003), 425(6954), 163-165

Long-ranged forces between surfaces in a liquid control effects from colloid stability [1] to biolubrication [2], and can be modified either by steric factors due to flexible polymers [3], or by surface ... [more ▼]

Long-ranged forces between surfaces in a liquid control effects from colloid stability [1] to biolubrication [2], and can be modified either by steric factors due to flexible polymers [3], or by surface charge effects [4]. In particular, neutral polymer 'brushes' may lead to a massive reduction in sliding friction between the surfaces to which they are attached [5-7], whereas hydrated ions can act as extremely efficient lubricants between sliding charged surfaces [8]. Here we show that brushes of charged polymers (polyelectrolytes) attached to surfaces rubbing across an aqueous medium result in superior lubrication compared to other polymeric surfactants. Effective friction coefficients with polyelectrolyte brushes in water are lower than about 0.0006-0.001 even at low sliding velocities and at pressures of up to several atmospheres (typical of those in living systems). We attribute this to the exceptional resistance to mutual interpenetration displayed by the compressed, counterion-swollen brushes, together with the fluidity of the hydration layers surrounding the charged, rubbing polymer segments. Our findings may have implications for biolubrication effects, which are important in the design of lubricated surfaces in artificial implants, and in understanding frictional processes in biological systems. [less ▲]

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See detailBulletin agrométéorologique - Août 2003
Tychon, Bernard ULg; De Longueville, Florence ULg; Ozer, Pierre ULg et al

in Bulletin Agrométéorologique (2003)

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See detailComportement des variétés de froment vis-à-vis de l'hiver 2002-2003
Couvreur, Luc; Herman, Jean-Luc; Vancutsem, Françoise ULg et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2003, September 09)

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See detailTraitement des semences de froment contre le piétin-échaudage
Moreau, Jean-Marc; Couvreur, Luc; Vancutsem, Françoise ULg

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2003, September 09)

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See detailMesures agri-environnementales (MAE) en froment d'hiver
Soete, Alice; Vancutsem, Françoise ULg; Bodson, Bernard ULg et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2003, September 09)

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See detailLe froment d'hiver
Vancutsem, Françoise ULg; Couvreur, Luc; Bodson, Bernard ULg et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2003, September 09)

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See detailAperçu de la qualité des froments d'hiver en 2003
Sinnaeve, Geoges; Lenartz, J.; Herman, Jean-Luc et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2003, September 09)

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See detailEstimation of surface soil organic matter by means of hyperspectral data analysis.
Touré, Souleymane; Tychon, Bernard ULg

Conference (2003, September 04)

This presentation shows results from two different hyperspectral instruments for the assessment of soil organic content of agricultural soils in southern Belgium.

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