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See detailEvaluation de la mesure "Prairie de haute valeur biologique - MAE8" en région agricole Fagne-Famenne
Rouxhet, Serge ULg; Walot, Thierri

Report (2006)

Durant l'été 2006, l'évaluation a été axée uniquement sur la mesure agri-environnementale "méthode 8 - prairie de haute valeur biologique" en région agricole Fagne-Famenne. Un échantillon de 43 parcelles ... [more ▼]

Durant l'été 2006, l'évaluation a été axée uniquement sur la mesure agri-environnementale "méthode 8 - prairie de haute valeur biologique" en région agricole Fagne-Famenne. Un échantillon de 43 parcelles au sein de 34 exploitations a été évalué. [less ▲]

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See detailUV-targeted dinucleotides are not depleted in light-exposed prokaryotic genomes
Palmeira, Leonor ULg; Gueguen, Laurent; Lobry, Jean R

in Molecular Biology and Evolution (2006), 23(11), 2214--2219

We have investigated the hypothesis that pyrimidine dinucleotides are avoided in light-exposed genomes as the result of selective pressure due to high ultraviolet (UV) exposure. The main damage to DNA ... [more ▼]

We have investigated the hypothesis that pyrimidine dinucleotides are avoided in light-exposed genomes as the result of selective pressure due to high ultraviolet (UV) exposure. The main damage to DNA produced by UV radiation is known to be the formation of pyrimidine photoproducts: it is estimated that about 10 dimers per minute are formed in an Escherichia coli chromosome exposed to the UV light in direct overhead sunlight at sea level. It is also known that on an E. coli chromosome exposed to UVb wavelengths (290-320 nm), pyrimidine photoproducts are formed in the following proportions: 59 TpT, 7 CpC, and 34 CpT plus TpC. We have analyzed all available complete prokaryotic genomes and the model organism Prochlorococcus marinus and have found that pyrimidine dinucleotides are not systematically avoided. This suggests that prokaryotes must have sufficiently effective protection and repair systems for UV exposure to not affect their dinucleotide composition. [less ▲]

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See detailLes Rußlanddeutschen, des immigrés privilégiés en voie de banalisation: Le cas du marché du travail
Dufays, Frédéric ULg

Master of advanced studies dissertation (2006)

À la fin des années quatre-vingts, une immigration massive en provenance des pays de l’espace anciennement socialiste s’est ajoutée à ce flux. La majorité de ces nouveaux migrants sont candidats à un ... [more ▼]

À la fin des années quatre-vingts, une immigration massive en provenance des pays de l’espace anciennement socialiste s’est ajoutée à ce flux. La majorité de ces nouveaux migrants sont candidats à un statut particulier, celui d’Aussiedler, créé en 1953 dans une logique de réparation de la seconde guerre mondiale et des conséquences de la politique hitlérienne. Dès lors, le statut d’Aussiedler est associé à plusieurs privilèges, dont la naturalisation, l’accès sans condition au marché du travail et un soutien financier. Avec l’arrivée de millions d’Aussiedler en provenance d’ex-URSS (Rußlanddeutschen) qui éprouvent des difficultés à s’intégrer, notamment à cause de leur manque de connaissance de l’allemand, le statut d’Aussiedler qui est fondé sur le droit du sang et sur la « germanité » (Deutschtum) pose désormais question. C’est au coeur de cette problématique que ce mémoire s’inscrit en tentant d’apporter un éclairage sur la situation actuelle des Rußlanddeutschen. Nous avons observé une diminution des privilèges ainsi qu’une évolution des justifications au fur et à mesure que le statut d’Aussiedler était remis en cause. Au changement de vision officielle s’ajoute une évolution du sentiment identitaire des Rußlanddeutschen eux-mêmes, en tout cas parmi les nouveaux arrivants. Se considérant davantage russes qu’allemands, ils se présentent comme des immigrés. Ce processus de banalisation des derniers arrivants est accéléré par une sorte de stigmatisation de ceux-ci par les Rußlanddeutchen arrivés au début de la vague de migration, c’est-à-dire aux alentours de 1990. Les derniers arrivants deviennent ainsi des Outsiders au sens de Norbert Elias, au même titre que d’autres communautés immigrées. Dans ce cadre général, nous nous sommes penchés sur le marché du travail comme espace de banalisation des Rußlanddeutschen. Utilisant les théories du capital humain et du capital social comme fondements, nous avons tenté de comprendre leur situation sur le marché du travail allemand, auquel ils sont censés avoir accès sans condition, privilège lié au statut d’Aussiedler. [less ▲]

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See detailVariations in Transnational Tutoring in Distance Learning: the Form@sup Experience
Volungeviciene, Airina; Leduc, Laurent ULg

in Revue Internationale des Technologies en Pédagogie Universitaire (2006), 3(1-2), 19-27

This paper describes several roles of transnational tutors from the standpoint of two of them, holding different positions in the design of a curriculum based on Distance Learning (Form@sup in its English ... [more ▼]

This paper describes several roles of transnational tutors from the standpoint of two of them, holding different positions in the design of a curriculum based on Distance Learning (Form@sup in its English version). These roles and positions will be presented according to two theoretical models. Particular focus will be placed on the relationship between the Central unit and a transnational tutor representing it locally. [less ▲]

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See detailSpecificity of different RIA systems for measurement of bovine pregnancy associated glycoproteins against carbohydrates and placental hormones.
Ayad, A.; Melo de Sousa, Noelita ULg; Sulon, J. et al

in Proceedings of the 10e Journée de Rencontre Bioforum (2006)

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See detailThe use of moderate hypothermia during cardiac surgery is associated with repression of tumour necrosis factor-alpha via inhibition of activating protein-1: an experimental study.
Qing, Ma; Woltje, Michael; Schumacher, Katharina et al

in Critical Care (2006), 10(2), 57

INTRODUCTION: The use of moderate hypothermia during experimental cardiac surgery is associated with decreased expression of tumour necrosis factor (TNF)-alpha in myocardium and with myocardial protection ... [more ▼]

INTRODUCTION: The use of moderate hypothermia during experimental cardiac surgery is associated with decreased expression of tumour necrosis factor (TNF)-alpha in myocardium and with myocardial protection. In order to identify the cellular mechanisms that lead to that repression, we investigated the effect of hypothermia during cardiac surgery on both main signalling pathways involved in systemic inflammation, namely the nuclear factor-kappaB (NF-kappaB) and activating protein-1 pathways. METHOD: Twelve female pigs were randomly subjected to standardized cardiopulmonary bypass with moderate hypothermia or normothermia (temperature 28 degrees C and 37 degrees C, respectively; six pigs in each group). Myocardial probes were sampled from the right ventricle before, during and 6 hours after bypass. We detected mRNA encoding TNF-alpha by competitive RT-PCR and measured protein levels of TNF-alpha, inducible nitric oxide synthase and cyclo-oxygenase-2 by Western blotting. Finally, we assessed the activation of NF-kappaB and activating protein-1, as well as phosphorylation of p38 mitogen-activated protein kinase by electrophoretic mobility shift assay with super shift and/or Western blot. RESULTS: During and after cardiac surgery, animals subjected to hypothermia exhibited lower expression of TNF-alpha and cyclo-oxygenase-2 but not of inducible nitric oxide synthase. This was associated with lower activation of p38 mitogen-activated protein kinase and of its downstream effector activating protein-1 in hypothermic animals. In contrast, NF-kappaB activity was no different between groups. CONCLUSION: These findings indicate that the repression of TNF-alpha associated with moderate hypothermia during cardiac surgery is associated with inhibition of the mitogen-activated protein kinase p38/activating protein-1 pathway and not with inhibition of NF-kappaB. The use of moderate hypothermia during cardiac surgery may mitigate the perioperative systemic inflammatory response and its complications. [less ▲]

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See detailChildren undergoing cardiac surgery for complex cardiac defects show imbalance between pro- and anti-thrombotic activity.
Heying, Ruth; van Oeveren, Wim; Wilhelm, Stefanie et al

in Critical Care (2006), 10(6), 165

INTRODUCTION: Cardiac surgery with cardiopulmonary bypass (CPB) is associated with the activation of inflammatory mediators that possess prothrombotic activity and could cause postoperative haemostatic ... [more ▼]

INTRODUCTION: Cardiac surgery with cardiopulmonary bypass (CPB) is associated with the activation of inflammatory mediators that possess prothrombotic activity and could cause postoperative haemostatic disorders. This study was conducted to investigate the effect of cardiac surgery on prothrombotic activity in children undergoing cardiac surgery for complex cardiac defects. METHODS: Eighteen children (ages 3 to 163 months) undergoing univentricular palliation with total cavopulmonary connection (TCPC) (n = 10) or a biventricular repair (n = 8) for complex cardiac defects were studied. Prothrombotic activity was evaluated by measuring plasma levels of prothrombin fragment 1+2 (F1+2), thromboxane B2 (TxB2), and monocyte chemoattractant protein-1 (MCP-1). Anti-thrombotic activity was evaluated by measuring levels of tissue factor pathway inhibitor (TFPI) before, during, and after cardiac surgery. RESULTS: In all patients, cardiac surgery was associated with a significant but transient increase of F1+2, TxB2, TFPI, and MCP-1. Maximal values of F1+2, TxB2, and MCP-1 were found at the end of CPB. In contrast, maximal levels of TFPI were observed at the beginning of CPB. Concentrations of F1+2 at the end of CPB correlated negatively with the minimal oesophageal temperature during CPB. Markers of prothrombotic activity returned to preoperative values from the first postoperative day on. Early postoperative TFPI levels were significantly lower and TxB2 levels significantly higher in patients with TCPC than in those with biventricular repair. Thromboembolic events were not observed. CONCLUSION: Our data suggest that children with complex cardiac defects undergoing cardiac surgery show profound but transient imbalance between pro- and anti-thrombotic activity, which could lead to thromboembolic complications. These alterations are more important after TCPC than after biventricular repair but seem to be determined mainly by low antithrombin III. [less ▲]

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See detailL'apport des revues et de la statistique à l'approche des réseaux
Dozo, Björn-Olav ULg; Purnelle, Gérald ULg

in Denis, Benoît; de Marneffe, Daphné (Eds.) Les Réseaux littéraires (2006)

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See detailCompte rendu de Pierre Ellinger, D'un Pausanias à l'autre (Paris, 2005)
Pirenne-Delforge, Vinciane ULg

in Kernos : Revue Internationale et Pluridisciplinaire de Religion Grecque (2006), 19

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See detailFetal profiles of bovine placental lactogen (PL) and insulin like growth factors (IGF-I and IGF–II) through the late gestation
Alvarez Oxiley, Andrea Vivian ULg; Melo de Sousa, Noelita ULg; Sulon, J. et al

in Prooceedings of the 10e Journée de Rencontre Bioforum (2006)

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See detailRéseaux et bases de données
Dozo, Björn-Olav ULg; Fréché, Bibiane

in Denis, Benoît; de Marneffe, Daphné (Eds.) Les Réseaux littéraires (2006)

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See detailEtude épistémologique sur la méthode de Fermat pour la recherche d'extrema
Bair, Jacques ULg; Henry, Valérie ULg

in Mathématique et Pédagogie (2006), 156

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See detailLes narrations de recherche : des écrits intermédiaires et réflexifs
Bair, Jacques ULg; Henry, Valérie ULg

in Mathématique et Pédagogie (2006), 158

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See detailRisk assessment of groundwater pollution using sensitivity analysis and a worst-case scenario analysis
Huysmans, Marijke; Madarasz, Tamas; Dassargues, Alain ULg

in Environmental Geology (2006), 50(2), 180-193

This paper illustrates how sensitivity analysis and a worst-case scenario analysis can be useful tools in risk assessment of groundwater pollution. The approach is applied to a study area in Hungary with ... [more ▼]

This paper illustrates how sensitivity analysis and a worst-case scenario analysis can be useful tools in risk assessment of groundwater pollution. The approach is applied to a study area in Hungary with several known groundwater pollution sources and nearby drinking water production wells. The main concern is whether the contamination sources threaten the drinking water wells of the area. A groundwater flow and transport model is set up to answer this question. Due to limited data availability, the results of this model are associated with large uncertainty. Sensitivity analysis and a worst-case scenario analysis are applied to estimate this uncertainty and build confidence in the model results. [less ▲]

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See detailConservation des ressources génétiques animales en Région wallonne: le paradoxe de l'hyperspécialisation
Daniaux, Christel ULg; Stassart, Pierre M ULg; Massart, Serges et al

in 13éme journées "3R" Proceeding (2006)

The main breed of the waloon regio are adapted to conditions of intensive production with extrem phenotypic experssion.

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See detailBimodal pollination system in rare endemic Oncocyclus irises (Iridaceae) of Lebanon
Monty, Arnaud ULg; Saad, Layla ULg; Mahy, Grégory ULg

in Canadian Journal of Botany (2006), 84(8), 1327-1338

Pollination systems based on indirect rewards, such as heat and shelter, have seldom been studied. Plant-pollinator interactions were characterized in Iris cedretii Dinsmore ex Chaudhary and Iris sofarana ... [more ▼]

Pollination systems based on indirect rewards, such as heat and shelter, have seldom been studied. Plant-pollinator interactions were characterized in Iris cedretii Dinsmore ex Chaudhary and Iris sofarana subsp. kasruwana Dinsmore ex Chaudhary, rare endemic Lebanese Oncocyclus irises exhibiting potential adaptation to shelter pollination. Despite a diversity of floral visitors (47 species), only two groups of Anthophoridae male bees (Xylocopa spp. and Eucera spp.) could be considered as efficient pollinators on the basis of frequency of visits, visiting behaviour, and pollen load. Lebanese Oncocyclus irises showed a bimodal pollination system with (1) diurnal visits at low rates but with potentially large pollen transfers by Xylocopa bees, exhibiting a foraging-like behaviour, principally during warm periods of the day and (2) sheltering, especially Eucera male bees, during night and day when the weather is changeable. Refuge occurrence in flowers was more important during the night (27%) than during the day (12%) and, for daytime, during cloudy or windy than sunny conditions. It also varied depending on the exposure of floral tunnels. Visitation rates of both day-visiting Xylocopa and night-sheltering Eucera were negatively associated with an increase of the number of flowers per clump. No experimental evidence was found showing that the principal advantage for male bees to shelter in Iris flowers was to fly earlier in the morning. [less ▲]

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See detailPotential of mid-infrared spectrometry for prediction of fatty acid contents in cow milk
Soyeurt, Hélène ULg; Dehareng, Frédéric; Dardenne, Pierre et al

Poster (2006)

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