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See detailBelgian beekeeping situation and the symptomatology as discriminatory tools
Nguyen, Bach Kim ULg; Mignon, Jacques ULg; Haubruge, Eric ULg

in Proceedings of the 4th Coloss Conference - Prevention of honey bee losses. COLOSS. Zagreb 3-4 March. abstract book p.8 (2009)

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See detailPregnancy-associated glycoproteins as diagnostic tool in cattle reproduction
Gajewski, Zdzislaw; Pertajitis; Melo de Sousa, Noelita ULg et al

in Schweizer Archiv für Tierheilkunde (2009), 151(12), 577-582

Pregnancy-associated glycoproteins are powerful pregnancy markers in domestic cattle. These proteins are expressed in mono- and binucleate trophoblast cells from the first days of gestation until calving ... [more ▼]

Pregnancy-associated glycoproteins are powerful pregnancy markers in domestic cattle. These proteins are expressed in mono- and binucleate trophoblast cells from the first days of gestation until calving. Different molecules were identified as being expressed at various stages of pregnancy. However, up to date, their functions and activities during pregnancy were not yet established. Specific RIA tests were developed (classic and alternative RIA) and used to measure the concentration of these glycoproteins in blood during gestation and the postpartum period in cattle. In maternal blood, PAGs rise to detectable levels from the 24th-28th days after fertilization. A recent study indicated that PAGs can also be detected in milk samples. However, concentrations in milk are much lower when compared to those of plasma. [less ▲]

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See detailLutte antidopage et cyclisme à deux vitesses: évolution du rapport au dopage chez les cyclistes belges depuis l'affaire Festina
Fincoeur, Bertrand ULg

in Revue Internationale de Criminologie et de Police Technique (2009), 3

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See detailInfluence de l'apport énergétique et de l'hibernation sur la croissance des tortues terrestres
Diez, Marianne ULg; Justet, Delphine; Detilleux, Johann ULg et al

in 15th FECAVA Eurocongress - Proceedings (2009)

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See detailCellular source and amount of vascular endothelial growth factor and platelet-derived growth factor in tumors determine response to angiogenesis inhibitors.
Sennino, Barbara; Kuhnert, Frank; Tabruyn, Sébastien ULg et al

in Cancer Research (2009), 69(10), 4527-36

Vascular endothelial growth factor (VEGF), platelet-derived growth factor (PDGF), and their receptors are important targets in cancer therapy based on angiogenesis inhibition. However, it is unclear ... [more ▼]

Vascular endothelial growth factor (VEGF), platelet-derived growth factor (PDGF), and their receptors are important targets in cancer therapy based on angiogenesis inhibition. However, it is unclear whether inhibition of VEGF and PDGF together is more effective than inhibition of either one alone. Here, we used two contrasting tumor models to compare the effects of inhibiting VEGF or PDGF alone, by adenovirally generated soluble receptors, to the effects of inhibiting both together. In RIP-Tag2 tumors, VEGF and PDGF inhibition together reduced tumor vascularity and abundance of pericytes. However, VEGF inhibition reduced tumor vascularity without decreasing pericyte density, and PDGF inhibition reduced pericytes without reducing tumor vascularity. By contrast, in Lewis lung carcinomas (LLC), inhibition of VEGF or PDGF reduced blood vessels and pericytes to the same extent as did inhibition of both together. Similar results were obtained using tyrosine kinase inhibitors AG-013736 and imatinib. In LLC, VEGF expression was largely restricted to pericytes and PDGF was largely restricted to endothelial cells, but, in RIP-Tag2 tumors, expression of both growth factors was more widespread and significantly greater than in LLC. These findings suggest that inhibition of PDGF in LLC reduced pericytes, and then tumor vessels regressed because pericytes were the main source of VEGF. The vasculature of RIP-Tag2 tumors, in which most VEGF is from tumor cells, was more resistant to PDGF inhibition. The findings emphasize the interdependence of pericytes and endothelial cells in tumors and the importance of tumor phenotype in determining the cellular effects of VEGF and PDGF inhibitors on tumor vessels. [less ▲]

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See detailL’impact de l’exposition à des modèles d’entrepreneurs sur les antécédents de l’intention entrepreneuriale
Aouni, Zineb ULg; Pirnay, Fabrice ULg

in Actes du 6ème Congrès de l’Académie de L’Entrepreneuriat (2009)

Devant la multiplication des programmes de formation et de sensibilisation à l’entrepreneuriat, la question reste posée quant à l’efficacité des actions et des méthodes pédagogiques utilisées. La présente ... [more ▼]

Devant la multiplication des programmes de formation et de sensibilisation à l’entrepreneuriat, la question reste posée quant à l’efficacité des actions et des méthodes pédagogiques utilisées. La présente étude propose de à cette question en s’intéressant à l’impact d’un événement de sensibilisation de courte durée (une soirée) qui utilise prioritairement une seule méthode pédagogique consistant en l’exposition à des modèles d’entrepreneurs. L’évaluation d’impact se base sur des indicateurs liés aux changements d’attitudes à l’égard de l’entrepreneuriat et par conséquent à des changements au niveau de l’intention d’entreprendre. Se basant sur la théorie de l’apprentissage entrepreneurial qui suppose que les individus apprennent différemment d’une même expérience en fonction de leur niveau de connaissance initial (Minniti et Bygrave, 2001 ; Cope, 2005), cette étude distingue l’analyse d’impact selon deux groupes de participants en fonction de leur niveau de perceptions (attitudes et sentiment de capacité) et d’intention entrepreneuriale initial. Les résultats de cette étude permettent ainsi d’identifier les variables de perception pouvant influencer l’impact de l’exposition à des modèles d’entrepreneurs et de conclure par rapport à l’influence du stock de connaissances préalable sur le processus d’apprentissage entrepreneurial. La méthode préconisée propose une analyse comparative entre un échantillon de 288 participants à l’événement de sensibilisation et un groupe de contrôle composé de 46 répondants non participants. La présente étude repose ainsi sur le protocole pré-post test avec groupe de contrôle. En terme d’implications pratiques, cette étude permet aux responsables de formations à l’entrepreneuriat d’appliquer des méthodes pédagogiques appropriées au public auquel ils s’adressent (en terme de niveau de perceptions et d’intention entrepreneuriale) ou de mieux cibler le public approprié aux actions pédagogiques utilisées. [less ▲]

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See detailEvaluation biologique du stress oxydant : application en routine clinique.
Pincemail, Joël ULg; Le Goff, Caroline ULg; Charlier, Corinne ULg et al

in Nutritions & Endocrinologie (2009), Déc

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See detailSaharan Dust Pollution: Implications for the Sahel?
de Longueville, Florence; Henry, Sabine; Ozer, Pierre ULg

in Epidemiology (Cambridge, Mass.) (2009), 20(5), 780

The main source of atmospheric mineral dust is the Sahara desert, which produces about half of the yearly global mineral dust.1 About 12% of the Saharan dust moves northwards to Europe, 28% westwards to ... [more ▼]

The main source of atmospheric mineral dust is the Sahara desert, which produces about half of the yearly global mineral dust.1 About 12% of the Saharan dust moves northwards to Europe, 28% westwards to the Americas, and 60% southwards to the Gulf of Guinea. Saharan dust storms can lead to particulate matter (PM) levels that exceed internationally recommended levels. Recently, special attention has been paid to the mineral PM air pollution of dust storms, which may be a serious health threat. We took a systematic review of the literature to find relevant studies on the effects of Saharan dust on air quality or human health. We searched the ISI web of knowledge database using “PM10,” “PM2.5” or “health” AND “dust storm,” “sand storm,” “African dust,” “Saharan dust,” or “dust events” without restrictions. The search extended from January 1999 to December 2008. We selected 97 articles of which 72 studied PM air pollution in Europe, 13 in the Americas, 7 in the Near East and Asia, and 4 considered international data. Only one specifically addressed air pollution in the Sahel. Four focused on human health effects—2 in the Mediterranean and 2 in the Caribbean. [less ▲]

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See detailLe fédéralisme « incompris » : perceptions et préférences d’un auditoire d’étudiants de l’ULg
Grandjean, Geoffrey ULg; Reuchamps, Min ULg; Flaba, Elodie ULg et al

in Revue de la Faculté de Droit de l'Université de Liège (2009), 54(3), 405-430

How do citizens who grew up in a federal system understand federalism in their country? To answer this important question, in an experimental design, we asked 234 French-speaking Belgian university ... [more ▼]

How do citizens who grew up in a federal system understand federalism in their country? To answer this important question, in an experimental design, we asked 234 French-speaking Belgian university students to “draw Belgium”. No other guidelines were given. In addition to this request, the students were asked to fill in a 19-question questionnaire about their federal perceptions and preferences as well as political and socio-demographic indicators. In this article, we analyze the results of the questionnaire and reflect on the relationships between representations and perceptions of federalism in Belgium. [less ▲]

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See detailFactors Affecting Plasma Pregnancy-associated Glycoprotein 1 Concentrations Throughout Gestation in High-producing Dairy Cows.
Serrano, B.; Lopez-Gatius, F.; Santolaria, P. et al

in Reproduction in Domestic Animals (2009), 44(4), 600-605

This study was designed to establish the factors, if any, which could affect plasma pregnancy-associated glycoprotein-1 (PAG-1) expression in a study population of 87 pregnant, high-producing dairy cows ... [more ▼]

This study was designed to establish the factors, if any, which could affect plasma pregnancy-associated glycoprotein-1 (PAG-1) expression in a study population of 87 pregnant, high-producing dairy cows. The factors examined were: semen providing breed (Holstein-Friesian vs Limousin), outcome of gestation (male vs female newborn, and singleton vs twin pregnancies), lactation number, milk production at pregnancy diagnosis, plasma progesterone concentration, season of gestation (warm period, March-November vs cool period, December-February), and day of gestation (40, 90, 120, 150, 180 and 210). Pregnancy was diagnosed by transrectal ultrasound on day 40 post-insemination and by palpation per rectum on days 90, 120, 150, 180 and 210. Blood samples were collected from each animal immediately before each pregnancy diagnosis. The relative contributions of the different factors on PAG-1 concentrations were evaluated by GLM repeated measures analysis of variance. No significant effects of the herd, foetal sex, milk production, lactation number and plasma progesterone concentrations were observed. In contrast, twin pregnancy, the use of Limousin semen and conception during the cool period were correlated with significantly increased plasma PAG-1 concentrations throughout gestation. Our data indicate that both cow well-being during early placental development, determined in our conditions by reduced heat stress when conception occurred in the cool season, and crossbreed pregnancies lead to improved PAG-1 production throughout the gestation period. [less ▲]

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See detailFirst epidemiological study on exposure to Neospora caninum in different canine populations in the Algiers District (Algeria)
Ghalmi, F.; China, B.; Kaïdi, R. et al

in Parasitology International (2009), 58(4), 444-450

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See detailMicrobial biomass and C and N transformations in forest floors under European beech, sessile oak, Norway spruce and Douglas-fir at four temperate forest sites
Malchair, Sandrine ULg; Carnol, Monique ULg

in Soil Biology & Biochemistry (2009), 41

The purpose of this research was to compare soil chemistry, microbially mediated carbon (C) and nitrogen (N) transformations and microbial biomass in forest floors under European beech (Fagus sylvatica L ... [more ▼]

The purpose of this research was to compare soil chemistry, microbially mediated carbon (C) and nitrogen (N) transformations and microbial biomass in forest floors under European beech (Fagus sylvatica L), sessile oak (Quercus petraea (Mattuschka) Lieblein), Norway spruce (Picea abies (L) Karst) and Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) at four study sites. We measured soil chemical characteristics, net N mineralization, potential and relative nitrification, basal respiration, microbial and metabolic quotient and microbial biomass C and N under monoculture stands at all sites (one mixed stand). Tree species affected soil chemistry, microbial activities and biomass. but these effects 'varied between sites. Our results indicated that the effect of tree species on net N mineralization was likely to be mediated through their effect on soil microbial biomass, reflecting their influence on organic matter content and carbon availability. Differences in potential nitrification and relative nitrification might be related to the presence of ground vegetation through its influence on soil NH4 and labile C availability. Our findings highlight the need to study the effects of tree species on microbial activities at several sites to elucidate complex N cycle interactions between tree species, ground vegetation, soil characteristics and microbial processes. (C) 2009 Elsevier Ltd. All rights reserved. [less ▲]

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See detailEvaluation of saturation and microcracking of the superficial zone of concrete: new developments
Courard, Luc ULg; Lenaers, Jean-François

in Alexander, M. G.; Beushausen, H.-D.; Dehn, F. (Eds.) et al Concrete Repair, Rehabilitation and Retrofitting II (2009)

Proper surface preparation is essential for the durability of the repaired structure as well as specific saturation level of the concrete. Moreover, the repair material is often blamed for “not sticking” ... [more ▼]

Proper surface preparation is essential for the durability of the repaired structure as well as specific saturation level of the concrete. Moreover, the repair material is often blamed for “not sticking”, but the general source of the trouble lies with the substrate surface conditioning. The extensive research project has been undertaken to develop specifications and performance criteria for surface preparation of concrete substrates, one of the tasks of which was to develop a field test to evaluate the optimum moisture conditioning of the substrate concrete prior to application of repair material. The Autocalm system has been calibrated and compared with destructive and non destructive tests (Schmidt hammer, microscope observations and water absorption) on three types of concrete and two types of surface preparation. In order to evaluate different saturation levels, concrete samples have been stored in more than 12 modes of conservation. [less ▲]

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See detailGeneration of total angular momentum eigenstates in remote qubits
Maser, A.; Schilling, U.; Bastin, Thierry ULg et al

Conference (2009)

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See detailEvaluation of the contamination of North Sea Porpoises (Phocoena phocoena) by endocrine disrupting chemicals using CG-MS and in vitro assays
Didimo Imazaki, Pedro Henrique ULg; Brose, François ULg; Remacle, Anne-Sophie ULg et al

Poster (2009)

During the last decades, the production of endocrine disrupting chemicals reached such elevated levels that they are now spread all over the environment. Endocrine disrupting chemicals are known to be ... [more ▼]

During the last decades, the production of endocrine disrupting chemicals reached such elevated levels that they are now spread all over the environment. Endocrine disrupting chemicals are known to be very slowly degraded, decreasing the environmental quality and causing ecological risks. Marine mammals inhabiting polluted environments accumulate high quantities of these chemicals, and are good indicators of marine pollution Thirteen major organochloride pollutants (known from literature to contaminate north sea porpoise) were chosen in this study – o,p’-DDD; p,p’-DDD; p,p’-DDE; o,p’-DDT; p,p’-DDT; HCB; α-HCH; β-HCH; γ-HCH; δ-HCH; PCB 138; PCB 153 and PCB 180. The thirteen chemicals were tested individually and in mixtures by the use of report gene expression assays. The MCF7-ERE cells used in the assays were originated from MCF7 human mammary tumor cells transfected with the ERE-luciferase reporter system. Preliminary results suggest that o,p’-DDD; p,p’-DDD; o,p’-DDT; HCB; β-HCH; δ-HCH; PCB 138 and PCB 180 are able to stimulate the luciferase expression of MCF7-ERE cells when they are present individually or in mixtures. No synergism was observed within mixtures. When MCF7-ERE cells were exposed to the chemicals and 17β-oestradiol simultaneously, p,p’-DDE; α-HCH; PCB 138 and PCB 180 could raise the luciferase expression in comparison to the exposition of 17β-oestradiol alone; on the other hand, o,p’-DDD; p,p’-DDT; HCB; β-HCH; γ-HCH and δ-HCH seem to inhibit the luciferase expression at low doses. In the next step, the pollutants will be searched and quantified in the blubber tissue of porpoises by use of gas chromatography-mass spectrometry. The blubber tissue samples will also have their endocrine disrupting effects characterized. This work is ongoing and It is expected a relevant level of these compounds to be found in the samples. Conversely, their endocrine disrupting effects and how they act in agonist, antagonist ways are subject that still needs to be studied. [less ▲]

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See detailSurface Properties Of New Virginiamycin M-1 Derivatives
Nott, Katherine ULg; Paquot, Michel ULg; Dufour, Samuel et al

in Colloids and Surfaces B : Biointerfaces (2009), 69(2),

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