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See detailLe retour de l’artiste maudit ? Le jury du Prix de la Jeune Peinture belge punit ses artistes
Bawin, Julie ULg

in Art Même : Chronique des Arts Plastiques de la Communauté française de Belgique (2007), (36), 22-23

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See detailRisk of high-grade cervical intra-epithelial neoplasia based on cytology and high-risk HPV testing at baseline and at 6-months.
BULK, Saskia ULg; Bulkmans, Nicole W. J.; Berkhof, Johannes et al

in International journal of cancer. Journal international du cancer (2007), 121(2), 361-7

Adding a test for high-risk human papillomavirus (hrHPV) to cytological screening enhances the detection of high-grade cervical intraepithelial neoplasia (>or=CIN2), but data are required that enable long ... [more ▼]

Adding a test for high-risk human papillomavirus (hrHPV) to cytological screening enhances the detection of high-grade cervical intraepithelial neoplasia (>or=CIN2), but data are required that enable long-term evaluation of screening. We investigated the >or=CIN2 risk for women participating in population-based screening as a function of hrHPV and cytology testing results at baseline and at 6 months. We included 2,193 women aged 30-60 years participating in a population-based screening trial who received colposcopy or a repeat testing advice at baseline. The main endpoint was histologically confirmed >or=CIN2 diagnosed within 36 months. hrHPV testing was more sensitive than cytology for >or=CIN2 (relative sensitivity 1.4, 95%CI: 1.3-1.5; absolute sensitivity 94.1 and 68.0%, respectively). The 18-month >or=CIN2 risks in women with a hrHPV-positive smear and in women with abnormal cytology were similar (relative risk 0.9, 95%CI: 0.8-1.1). Women with HPV16 and/or HPV18 had a higher >or=CIN2 risk than other hrHPV-positive women irrespective of the cytological grade. Repeat testing showed that both cytological regression and viral clearance were strongly associated with a decrease in >or=CIN2 risk. Notably, women who had a double negative repeat test at 6 months had a >or=CIN2 risk of only 0.2% (95%CI: 0.0-1.1) and hrHPV-negative women with baseline borderline or mild dyskaryosis and normal cytology at 6 months had a >or=CIN2 risk of 0% (95%CI: 0.0-0.8). Using hrHPV and/or cytology testing, risk of >or=CIN2 can be assessed more accurately by repeat testing than single visit testing. Hence, when hrHPV testing is implemented, patient management with repeat testing is a promising strategy to control the number of referrals for colposcopy. [less ▲]

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See detailManet et son double. Mallarmé au miroir de la peinture
Durand, Pascal ULg

in Denooz J; Dortu, V.; Steinmetz, R. (Eds.) Mosaïque. Hommages à Pierre Somville (2007)

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See detailCleanability assessment of model solid surfaces with a radial-flow cell
Detry, Jean G; Rouxhet, Paul G; Boulange-Petermann, Laurence et al

in Colloids and Surfaces A : Physicochemical and Engineering Aspects (2007), 302(1-3), 540-548

The cleanability of several model solid substrates (glass, stainless steel, polystyrene and polytetrafluoroethylene-PTFE) was studied with a radial-flow cell. Two soiling methods were used to mimic ... [more ▼]

The cleanability of several model solid substrates (glass, stainless steel, polystyrene and polytetrafluoroethylene-PTFE) was studied with a radial-flow cell. Two soiling methods were used to mimic splashing with oil; a thin layer chromatography sprayer giving a narrower and more reproducible oil droplet size distribution was preferred. Glass was the most cleanable substrate, a result which may be consistent with the presence of a swelling gel-like layer at the surface. For the other substrates, the mechanical action exerted by the fluid played a major role in oil removal; however the detergent seemed to intervene after about 5-10 min, facilitating cleaning of PTFE. Oil droplet removal took place only at high wall shear stress, in zones where flow conditions where not well controlled making it impossible to evaluate the wall shear stresses needed for oil droplet removal. Evaluation of cleanability by using the radial-flow cell is restricted to variations of wall shear stresses in a range below 3 N m(-2). (C) 2007 Elsevier B.V. All rights reserved. [less ▲]

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See detailMesure de la distribution des phases dans une colonne de distillation réactive par tomographie à rayons X
Aferka, Saïd ULg; Saroha, A.; Toye, Dominique ULg et al

in Récents Progrès en Génie des Procédés - N°95 - Actes des 5èmes Journées francophones sur les réacteurs gaz-liquide et gaz-liquide-solide, 12-15 juin 2007, Carry-le-Rouet, France (2007)

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See detailAnalyse de la variabilité des précipitations sahéliennes et évaluation des impacts sur l’environnement de quelques localités nigériennes et maliennes
Bolakonga Ilye, Antoine Bily ULg; Ozer, Pierre ULg

in Annales de l’Institut Facultaire des Sciences Agronomiques de Yangambi (2007), 1

Our sixteen stations go from the Sahelian climate at the Niger’s southern extreme near of the lake Chad to the soudanian climate at the Niger’s southern west with respectively annual precipitations 210 ... [more ▼]

Our sixteen stations go from the Sahelian climate at the Niger’s southern extreme near of the lake Chad to the soudanian climate at the Niger’s southern west with respectively annual precipitations 210 and 816 mm. The majority of the stations are Sahelian and have the precipitations between 300 and 600 mm. The analysis of the proportions of extreme precipitations to the total of annual precipitations shows that the drier areas are the more where proportion of the extreme events is relatively high. Whereas it is on average 30%, it rises up to values between 41 and 60% in the driest localities. This has consequences as on the distribution of the rains and thus on the vegetable cover as on the pedological substrate which would be better exposed to erosion. However, on the whole of the stations, the highest precipitation daily height of the year remained generally stable; with the environmental damage, the risk of erosion would have also increased. Moreover, the test of Pettitt reveals that, for all the stations, more than 75% of the ruptures occur between 1965 and 1971 suggesting that the dryness of the second decade of the years 1960 is the rainy event which will have the most marked the pluviometric mode during our study time (1941 to 1990). [less ▲]

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See detailComparatisme institutionnel et analyse sémiotique du discours métalittéraire francophone : problèmes d’une recherche en cours
Provenzano, François ULg

in Wilhelm, Frank; Baustert, Raymond; Colas-Blaise, Marion (Eds.) et al Le Blé en herbe : actes des premières Journées des Jeunes chercheurs/euses en Littérature et Linguistique françaises (2007)

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See detailA kinetic study of multi-walled carbon nanotube synthesis by catalytic chemical vapor deposition using a Fe-Co/Al2O3 catalyst
Pirard, Sophie ULg; Douven, Sigrid ULg; Bossuot, Christophe et al

in Carbon (2007), 45(6), 1167-1175

A kinetic study was performed to describe the initial specific rate of multi-walled carbon nanotube synthesis by catalytic chemical vapor deposition (CCVD) on a bimetallic cobalt-iron catalyst at high ... [more ▼]

A kinetic study was performed to describe the initial specific rate of multi-walled carbon nanotube synthesis by catalytic chemical vapor deposition (CCVD) on a bimetallic cobalt-iron catalyst at high temperature using ethylene decomposition to solid carbon and gaseous hydrogen. The study uses a mass spectrometer that allows reaction rate to be inferred from the exhaust gas composition measurements. The aim is to obtain a better understanding of the elementary steps involved in the production of carbon nanotubes so as to derive phenomenological kinetic models in agreement with experimental data. The best models assume the elimination of the first hydrogen atom from adsorbed ethylene as rate determining step and involve a hydrogen adsorption weak enough to be neglected. It was proved that hydrogen partial pressure has no influence on initial reaction rate of carbon nanotube synthesis with the catalyst used for this study. Activation energy and ethylene adsorption enthalpy were found to be equal to around 130 and - 130 kJ mol(-1), respectively. (C) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailGuide for validation of analytical procedures
Oprean, R.; Rozet, Eric ULg; Dewé, Walthère ULg et al

Book published by Medicala Universitara “Iuliu Hatieganu” (2007)

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See detailUne procédure d’affectation multi-flux et multimodale appliquée aux réseaux transeuropéens de transport de fret
Jourquin, Bart; Limbourg, Sabine ULg

in Les Cahiers Scientifiques du Transports (2007), 52

Les modèles multimodaux de fret so ellement basés sur le modèle à quatre étapes dans lequel la génération, la distribution, la répartition modale et l’affectation sont autant de modules séparés. Une ... [more ▼]

Les modèles multimodaux de fret so ellement basés sur le modèle à quatre étapes dans lequel la génération, la distribution, la répartition modale et l’affectation sont autant de modules séparés. Une approche alternative est de représenter le réseau multimodal par un réseau de service dans lequel chaque opération de transport (chargement, déchargement, transbordement,…) est représentée par un « arc virtuel » dédié. Dans un tel réseau, le choix-modal et l’affectation peuvent être effectués en une seule étape. Cette approche, adoptée par plusieurs auteurs et connue sous les vocables « super-rése aux » ou « réseaux virtuels » donne des résultats intéressants, mais nécessite la mise enoeuvre de méthodes d’affectation appropriées, qui peuvent répartir les flux d’une origine à une destination particulière entre des itinéraires alternatifs. Il s’avère que les techniques d’affectation d'équilibre ne conviennent pas lorsqu’elles son t utilisées sur des réseaux internationaux pour lesquels seules des données agrégées pour la demande sont disponibles. En effet, les solutions obtenues sont très proches d’une affectation « tout ou rien », et n’aboutissent donc pas à une répartition suffisante entre chemins alternatifs. Ceci peut principalement être expliqué par le fait que, dans le trafic interurbain, interrégional ou international, une petite partie du voyage seulement est faite pendant les heures de pointes dans des zones congestionnées. De plus, les données de demande collectées sur de grandes zones sont souvent disponibles uniquement sur base annuelle, rendant difficile une estimation fine pour une période donnée du jour. C’est dans ce contexte que cet article décrit une technique d’affectation multi-flux qui peu t être appliquée sur de grands réseaux virtuels de transport de fret. L’article se termine avec une application de la méthode au réseau transeuropéen. [less ▲]

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See detailA dataset for hadron elastic scattering
Cudell, Jean-René ULg; Lenguel, Sasha; Martynov, E.

Textual, factual or bibliographical database (2007)

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See detailEffect of extraction conditions on the yield and purity of apple pomace pectin precipitated but not washed by alcohol
Garna, Haikel; Mabon, Nicolas; Robert, Christelle et al

in Journal of Food Science (2007), 72(1), 1-9

A study of the influence of extraction condition (pH: 1.5 to 2; temperature: 80 to 90 degrees C; extraction time: 1 to 3 h), on the yield and purity of apple pomace pectin without elimination of ... [more ▼]

A study of the influence of extraction condition (pH: 1.5 to 2; temperature: 80 to 90 degrees C; extraction time: 1 to 3 h), on the yield and purity of apple pomace pectin without elimination of impurities by alcohol washing was carried out. The alcohol precipitate yields varied from 2.9% to 8.9% depending on the pH. At pH 1.5, these yields were higher than those obtained at pH 2 contrary to the galacturonic acid purity (%w/w). Compounds other than pectins were solubilized from the cell walls of apple pomace at pH 1.5, and they were precipitated with alcohol. The apple pectins obtained from the different extraction procedures were highly methylated (54.5% to 79.5%), especially when the conditions (temperature, pH) were drastic. Similar conclusions can be drawn for the neutral sugar content that decreased at pH 1.5 (arabinose, xylose, and galactose) or at the highest temperatures and extraction times (arabinose and galactose). The phenomenon of demethylation and pectin degradation of neutral sugars chains can be observed at acid pH, and long extraction times. The presence of high quantities of mannose or fructose, glucose, and xylose in the alcohol precipitate showed that pectin precipitation with ethanol was not specific. [less ▲]

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See detailLe Triton crêté, Triturus cristatus (Laurenti, 1768)
Jacob, Jean-Paul; Denoël, Mathieu ULg

in Jacob, Jean-Paul; Percsy, Christiane; de Wavrin, Hellin (Eds.) et al Amphibiens et Reptiles de Wallonie (2007)

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See detailLe Triton ponctué, Triturus vulgaris (Linnaeus, 1758)
Denoël, Mathieu ULg

in Jacob, Jean-Paul; Percsy, Christiane; de Wavrin, Hellin (Eds.) et al Amphibiens et Reptiles de Wallonie (2007)

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See detailRelationship between progesterone and pregnancy-associated glycoprotein concentrations in the maternal circulation during early pregnancy in dairy cows.
Barbato, O.; Merlo, M.; Melo de Sousa, Noelita ULg et al

in Proceedings of the 23rd Scientific Meeting of the European Embryo Transfer Association (2007)

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See detailResearch and development in Europe in the field of muscle science and meat technology
Clinquart, Antoine ULg

in Sciences des Aliments (2007), 27(2), 109-122

The aim of the Journées des Sciences du Muscle et Technologies de la Viande is to give a report on the most recent research works to the technical, economical and scientific actors of the meat production ... [more ▼]

The aim of the Journées des Sciences du Muscle et Technologies de la Viande is to give a report on the most recent research works to the technical, economical and scientific actors of the meat production and transformation chain. The topics of these researches and the organisations that carry them out evolve with time, depending in particular to the needs of the actors (producers, manufacturers, distributors, consumers) and of the socio-economic context. In addition, these researches fit themselves more than ever in an international context, particularly on a European level. The objective of this lecture, a somewhat ambitious idea, is to give an overview of the researches undertaken in Europe in muscle science and meat technology field. [less ▲]

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See detailDifferential effects of hypoxia on etoposide-induced apoptosis according to the cancer cell lines
Cosse, Jean-Philippe ULg; Sermeus, Audrey; Vannuvel, Kayleen et al

in Molecular Cancer (2007)

Background: It is more and more recognized that hypoxia plays a role in the resistance of cancer cells to chemotherapy. However, the mechanisms underlying this resistance still need deeper understanding ... [more ▼]

Background: It is more and more recognized that hypoxia plays a role in the resistance of cancer cells to chemotherapy. However, the mechanisms underlying this resistance still need deeper understanding. The aim of this study was to investigate the effect of hypoxia on this process since hypoxia is one of the hallmarks of tumor environment. Results: The effect of hypoxia on the apoptosis induced by etoposide, one drug commonly used in chemotherapy, was investigated using three different cancer cell lines. Gene expression changes were also studied in order to delineate the mechanisms responsible for the hypoxia-induced chemoresistance. We observed that hypoxia differentially influenced etoposide-induced cell death according to the cancer cell type. While hypoxia inhibited apoptosis in hepatoma HepG2 cells, it had no influence in lung carcinoma A549 cells and further enhanced it in breast cancer MCF-7 cells. Etoposide increased p53 activity in all cell lines while hypoxia alone decreased it only in HepG2 cells. Hypoxia had no influence on the etoposide-induced p53 activity in A549, increased p53 abundance in MCF-7 cells but markedly decreased p53 activity in HepG2 cells. Using low density DNA arrays to detect the expression of genes involved in the regulation of apoptosis, etoposide and hypoxia were shown to each influence the expression of numerous genes, many of the ones influenced by etoposide being p53 target genes. Again, the influence of hypoxia on the etoposideinduced changes was different according to the cell type. Conclusion: These results evidenced that there was a striking parallelism between the effect of hypoxia on the etoposide-induced p53 stabilization as well as p53 target gene expression and its effect on the etoposide-induced apoptosis according to the cell type. They are very interesting not only because they provide one possible mechanism for the induction of chemoresistance under hypoxic conditions in cells like HepG2 but also because they indicate that not all cell types respond the same way. This knowledge is of importance in designing adequate treatment according to the type of tumors. [less ▲]

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See detailNumerical simulation of materials submitted to high strain rates. A thermomechanical coupled approach
Jeunechamps, Pierre-Paul ULg; Ponthot, Jean-Philippe ULg

in Int. Conf. on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2007 (2007)

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See detailBacterial protein synthesis in the pig's large intestine varies according to the fermented non-starch polysaccharides.
Bindelle, Jérôme ULg; Leterme, Pascal; Destain, Jean-Pierre ULg et al

in Journal of Animal Science (2007), 85(Suppl. 2), 114-115

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