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See detailEarly detection of alien plants in xeric Natura 2000 sites in Southern Belgium
Monty, Arnaud ULg; Frisson, Gwenn; Mahy, Grégory ULg

Poster (2012)

The Natura 2000 network consists of sites designated by the member States of the European Union, under the Habitats and Birds Directives. Setting up that network is one of the biggest challenge in nature ... [more ▼]

The Natura 2000 network consists of sites designated by the member States of the European Union, under the Habitats and Birds Directives. Setting up that network is one of the biggest challenge in nature conservation in Europe, since habitats and species for which Natura 2000 sites are designated must be maintained in a “favorable conservation status”. Little is known so far, however, about how Natura 2000 sites are invaded by exotics species. Xeric habitats of high biological value included in the Natura 2000 network are among the most species-rich in Southern Belgium. They include calcareous grasslands, sandy meadows, dry heathlands, boxwood stands, siliceous rocks and calcareous rocks. We randomly sampled 15% of sites in each of these six categories (with a minimum of five sites per category) , with a total of 86 sites out of 470 existing sites. In each site, we recorded the presence/absence of 63 alien plants know to develop in xeric habitats (species list based on Verloove (2006) and expert’s personnal observations.), and estimated species cover. 25 naturalized alien plant species were observed in xeric habitats of the Natura 2000 network in Southern Belgium. Generally, alien species populations were still limited. [less ▲]

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See detailThe tomato leafminer reproduces without a mate: New case of parthenogenesis in Lepidoptera
Caparros Megido, Rudy ULg; Haubruge, Eric ULg; Verheggen, François ULg

Poster (2012)

The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), originates from South America and is now considered to be one of the most damaging invasive pests of tomatoes in the Mediterranean Basin ... [more ▼]

The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), originates from South America and is now considered to be one of the most damaging invasive pests of tomatoes in the Mediterranean Basin countries of Europe and North Africa. The preventing pest mating control methods include: (1) the use of synthetic pheromones for male attraction and annihilation inside insecticide-contain- ing traps; (2) mating disruption by saturating the atmosphere with sex pheromones which alter the ability of males to locate females; and (3) massive applications of sterile males to alter the overall reproductive success of the pest popula- tion. However, all these methods achieve only a poor success rate in controlling T. absoluta populations under greenhouse conditions. Sex pheromone management and sterile insect techniques are both based on an important biological trait: the insect must breed through sexual reproduction. Here, we report for the first time laboratory evidence of deuterotokous parthenogenesis, an asexual reproduction where both males and females are produced from unfertilized eggs. [less ▲]

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See detailAnthropisation et effets de lisière: impacts sur la diversité des rongeurs dans la réserve forestière de Masako (Kisangani, RDC)
Iyongo, L; Visser, M; Verheyen, E et al

Poster (2012)

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See detailEtude des feux d'aménagement en zone tropicale semi-aride: cas du Parc Régional du W du Niger
Diouf, A; Barbier, N; Saadou, M et al

Poster (2012)

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See detailImmature Metaplastic CIN1: A Variant with Intense P16 Staining and Low Proliferative Index
Parra-Herran, Christopher P.; Lane, Bruno; Hirsch, MS et al

Poster (2012)

Background: Epithelial maturation traditionally is used to grade CIN in histologic sections. However, in some an immature epithelium displays atypia that is low in proportion to the level of epithelial ... [more ▼]

Background: Epithelial maturation traditionally is used to grade CIN in histologic sections. However, in some an immature epithelium displays atypia that is low in proportion to the level of epithelial maturity. Although MIB1 and p16ink4 are helpul in establishing the diagnosis of CIN in this setting, classifying such lesions can be problematic. We analyzed a subset of these atypias, and this study summarizes a correlation between morphology and p16 and MIB1 immunostaining. Design: Immature metaplastic atypias were divided into those with putative low (uniform nuclear spacing, minimal nuclear variation, absent or mild nuclear hyperchromasia) and high-grade (irregular nuclear spacing, heterogeneous nuclear morphology, increased nuclear chromasia) features. Immunohistochemical staining for p16 was classifi ed as patchy or diffuse (horizontally) and MIB-1 proliferation index was recorded as percentage of positive cells and location of elevated proliferative index as a function of basal, middle and superfi cial third of the epithelium. Staining patterns and histologic grade were correlated. Results: Forty-three cases were classified without knowledge of the immunohistochemistry. Immature metaplastic low grade CINs exhibited strong and diffuse staining for p16 and but unlike High grade CINs, the proliferating (MIB1+) cells were concentrated in the more basal 1-2 thirds of the epithelium and the proliferative index was less than 30%. Variable columnar differentiation was observed in some, with strong staining of both the columnar and squamous cells by p16. Conclusions: A distinct subset of immature CINs displays a uniform cell population and based on both cytology and proliferative index, warrants classifi cation as low grade CIN (CIN1). p16 immunohistochemistry, although helpful in the recognition of these lesions, will not distinguish them from higher grade CIN (CIN2/3). Attention to regularity in nuclear morphology with absence of noticeable differences in cell size and shape, combined with MIB1 staining, is helpful,. The presence of columnar differentiation, which also stains positive for p16 is consistent with bidirectional differentiation in the transformation zone epithelium. Further studies of this entity are warranted to precisely determine its biologic behavior. [less ▲]

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See detailTypage des souches de Norovirus circulant dans les populations symptomatiques et asymptomatiques au Burkina Faso
HUYNEN, Pascale ULg; Mauroy, Axel ULg; MARTIN, Caroline et al

Poster (2012)

Appartenant à la famille des Caliciviridae, genre Norovirus, les norovirus (NoV) sont des virus non enveloppés dont le génome est composé d’un ARN monocaténaire de polarité positive ... [more ▼]

Appartenant à la famille des Caliciviridae, genre Norovirus, les norovirus (NoV) sont des virus non enveloppés dont le génome est composé d’un ARN monocaténaire de polarité positive d’approximativement 7,5 kb. Les NoV infectent l’homme chez qui ils représentent au niveaumondial un agent majeur de gastroentérites épidémiques, d’origine souvent alimentaire mais aussi sporadique, et ce, toutes classes d'âges confondues. Les souches humaines sont classées génétiquement dans différents génotypes au sein de trois des cinq génogroupes, nommés (G) I, II et IV, composant le genre Norovirus. La voie de transmission des NoV est féco-orale. Les NoV sont très résistants dans l’environnement et la dose infectieuse est faible. Dans la population humaine, une grande diversité de souches appartenant principalement aux G I et II co-circulent. Parmi ces souches, le génotype Lordsdale (GII-4) est prédominant dans les épidémies actuelles, notamment lorsqu'une transmission de personne à personne est incriminée, alors que les souches du G I semblent plus fréquemment rapportées au cours des épidémies d’origine environnementale, comme celles liées à la consommation de fruits de mer. Si de nombreuses études d'épidémiologie moléculaire concernant ces virus ont été réalisées dans les pays industrialisés, les données sont par contre manquantes ou ténues pour bien des pays non industrialisés, et en particulier africains. Au cours d'une étude épidémiologique réalisée à Bobo Dioulasso au Burkina Faso et portant sur la prévalence des NoV dans les échantillons de selles de patients présentant ou non des symptômes de gastro-entérite, les souches détectées ont été quantifiées, leur génogroupe a été déterminé et pour certaines d'entre elles le génotype a été précisé. Quatre cent cinquante trois patients ont été prélevés, dont 319 présentant des symptômes diarrhéiques et 134 sujets témoins ne présentant pas de symptomatologie digestive. La détection des NoV et la quantification des charges virales excrétées ont été effectuées sur tous les échantillons par RT-PCR en temps réel permettant de discriminer les souches appartenant aux G I ou II. Une RT-PCR conventionnelle visant les régions de la polymérase (ORF1 du virus) ou de la capside (ORF2) a ensuite été réalisée sur une partie des échantillons détectés positifs en vue du séquençage de ces régions. Les relations phylogénétiques des souches circulant dans la population du Burkina Faso aux souches de référence ont aussi été inférées. Les résultats de RT-PCR en temps réel ont permis de mettre en évidence que les prévalences apparentes de l'infection par les NoV sont similaires dans les populations symptomatique et asymptomatique : une détection moléculaire de NoV chez 67 patients présentant de la diarrhée (21,0 %) et chez 31 des sujets témoins (23,1 %) a pu être observée. Les génotypes circulant détectés sont très variés dans les deux génogroupes, avec une proportion assez surprenante de NoV appartenant au G I. Université polytechnique de Bobo-Dioulasso, Institut supérieur des Sciences de la Santé (INSSA), Bobo-Dioulasso, Burkina Faso. Cette étude a permis de préciser l'épidémiologie moléculaire des souches de NoV circulant dans un pays représentatif de l'Afrique de l'Ouest. Elle a également montré que des individus asymptomatiques pourraient jouer un rôle assez important de réservoir du virus. Elle souligne enfin que, malgré le fait que les souches GII, et en particulier celles de génotype GII.4, soient à l'heure actuelle rapportées majoritairement au niveau mondial, les souches G I doivent être excrétées en égale proportion dans l'environnement. L'origine épidémiologique de la différence entre les prévalences apparentes des infections par les souches de GI et de GII, bien que partiellement expliquée par les différences de sensibilité génétique et d'immunité de population, reste donc à élucider. Remerciements: à la fondation A. Seghers, au Centre de Coopération au Développement de l'Université de Liège, à R. Boreux (assistance technique), aux membres du laboratoire du CMA de Dô et aux agents de santé de Bobo-Dioulasso (Burkina-Faso). [less ▲]

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See detailRegeneration pos-fire of herbaceous communities of campos rupestres (tropical altitude grasslands)
Hernandez, Pauline; Le Stradic, Soizig ULg; Buisson, Elise et al

Poster (2012)

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See detailKINETICS OF QUINALPHOS RESIDUES ELIMINATION IN WATER AND FISH TISSUES FROM TANK CULTURED SILVER BARB (Barbonymus gonionotus)
Nguyen Quoc, Thinh; Tran Minh, Phu; Do Thi Thanh, Huong et al

Poster (2012)

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See detailMicellar electrokinetic chromatography (MEKC) systems for the separation of mixtures of charged and uncharged compounds
Lamalle, Caroline ULg; Servais, Anne-Catherine ULg; Fradi, Inès et al

Poster (2012)

The migration behaviour of charged and uncharged analytes in MEKC was investigated under different conditions. Effective mobilities – electrophoretic mobilities under the influence of the negatively ... [more ▼]

The migration behaviour of charged and uncharged analytes in MEKC was investigated under different conditions. Effective mobilities – electrophoretic mobilities under the influence of the negatively charged micelles – of cations, anions and neutrals were measured at neutral, basic and acidic pH values (7.5, 11 and 2.2) using background electrolytes containing different sodium dodecyl sulfate (SDS) concentrations (0-90 mM) and acetonitrile proportions (0-75 %, v/v). The SDS concentration and acetonitrile proportion were found to have a tremendous effect on the effective mobilities and the migration order of the tested compounds. Although the SDS micelles interact more strongly with neutrals and cations, the migration of anionic compounds is also affected by the SDS concentration, indicating that hydrophobic interactions can occur between the micelles and these compounds. Since cationic, anionic and neutral solutes exhibit rather different migration behaviours, it is possible to considerably enhance the separation selectivity by properly adjusting the SDS concentration and the acetonitrile proportion in the background electrolyte. These observations confirm the interest of using MEKC not only for the separation of neutral substances but also for the analysis of mixtures of charged compounds. [less ▲]

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See detailChemical constraint of solitary bees in host-plant specialization
Vanderplanck, Maryse ULg; Pinczewski, Azzédine; Wathelet, Bernard ULg et al

Poster (2012)

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See detailThe presentation of skull base osteoid osteoma with acute life threatening events. A case series.
Mallick, A; Mirza, AH; POIRRIER, Anne-Lise ULg et al

Poster (2012)

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See detailNumerical simulation of DP steel damage using a physically-based GTN model
Fansi, Joseph; Habraken, Anne ULg; Balan, Tudor et al

Poster (2012)

Poster describing the identification and use of Gurson model on DP Steel

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See detailDevelopment of a non-lethal sampling method to monitor immune response and disease progression in salmonid fish
Collet, Bertrand; Secombes, Chris J; Mira Monte, Milena ULg et al

Poster (2012)

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See detailPollen contents : what matters for polylectic bees ?
Moerman, Romain; Vanderplanck, Maryse ULg

Poster (2012)

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See detailAlternative splicing of the elastin gene in horses affected with chronic progressive lymphedema.
Dekeyser, Kirsten; Schroyen, Martine ULg; Oosterlinck, Maarten et al

Poster (2012)

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See detailMUC4 is not related to susceptibility in piglets to enterotoxigenic Escherichia coli-F4.
Schroyen, Martine ULg; Stinckens, Anneleen; Verhelst, Roderick et al

Poster (2012)

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See detailIs Sino-Nasal Outcome Test 22 (SNOT-22) an Appropriate Outcome Measure for Septorhinoplasty?
Goodson, Alexandre; POIRRIER, Anne-Lise ULg; Ahluwalia, Suki et al

Poster (2012)

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See detailPrenatal undernutrition of the chicken embryo leads to changes in plasma T3 and corticosterone levels
Willems, Els; Wang, Yufeng; Willemsen, Hilke et al

Poster (2012)

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See detailSNP’s in different genes involved in fat storage are not associated with boar taint in Belgian pigs.
Schroyen, Martine ULg; Janssens, Steven; Stinckens, Anneleen et al

Poster (2012)

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See detailRégénération des communautés de campos rupestres, pelouses tropicales d’altitude, après un feu (Brésil)
Hernandez, Pauline; Le Stradic, Soizig ULg; Buisson, Elise et al

Poster (2012)

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See detailStable isotope composition spatial variability at microhabitat scale of macrofauna inhabiting a tropical freshwater stream (Pérou River, Guadeloupe)
Lepoint, Gilles ULg; Marichal, Nicolas; Troupin, Charles ULg et al

Poster (2012)

The spatial variability of isotopic (C and N) composition of freshwater fauna was assessed in a small and pristine tropical stream (Pérou River, Guadeloupe). In order to assess this variability, a section ... [more ▼]

The spatial variability of isotopic (C and N) composition of freshwater fauna was assessed in a small and pristine tropical stream (Pérou River, Guadeloupe). In order to assess this variability, a section of 80 m was mapped and divided in quadrate (n= 132). Microhabitats (i.e. depth, hydrodynamic facies, presence of litter) were defined for each quadrate. Electric fishing was performed in each quadrate and individual isotopic measurements using EA-IRMS were done using abdominal muscles for crustaceans and lateral muscles for fishes. Isomap was generated for each species. Potential food sources (green ripisylve, macrophytodetritus, epilithic biofilm and deriving organic material) were sampled and analyzed for their isotopic composition. SIAR mixing model was applied to try to delineate isotopic and trophic variability in relation to microhabitat in this river section. Nine species were recorded belonging to four decapod families (n= 8 species) and one fish family (n= 1 species). This fauna, dominated by crustaceans, is typical of high and medium elevations of Caribbean rivers in relatively pristine area. In these turbulent biotopes, species encountered are strongly linked to the hydrological characteristics of their microhabitat and have well defined preferenda. Isotopic compositions of ripisylve material, of deriving matter and of autochtonous biofilm were significantly different for both 13C values and 15N values, allowing to discriminate their respective contributions to consumer diet. Epilithic and epiphytic biofilm appeared to contribute significantly to these diets, but most of the species showed evidence for litter material contribution too. Species repartition and their respective diet were evident at microhabitat scale and strongly related to hydrological regime. [less ▲]

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See detailDispersal and regeneration capacity of large-seeded tree species in a forest-savanna mosaic in Western DR Congo
Trolliet, Franck ULg; Huynen, Marie-Claude ULg; Hambuckers, Alain ULg

Poster (2012)

It is widely recognized that the Congo Basin is affected by numerous anthropogenic pressures. A number of studies proved that hunting and forest fragmentation diminish the diversity and abundance of large ... [more ▼]

It is widely recognized that the Congo Basin is affected by numerous anthropogenic pressures. A number of studies proved that hunting and forest fragmentation diminish the diversity and abundance of large vertebrates, more specifically, of large frugivores. The depletion of those animals can directly affect large-seeded tree species as large seeds closely depend on the community of large frugivorous vertebrates for their dispersal. Then, the disruption of animal mediated seed dispersal is thought to deeply impact the plant regeneration capacity. The forest-savanna mosaic situated in Western DR Congo is an ecotone characterized by naturally occurring forest fragments which are also subject to numerous anthropogenic pressures. Those are very likely to disrupt seed dispersal mechanisms and to alter forest regeneration processes. To date, few studies have considered the effect of such an ecosystem on plant-animal interaction dynamics such as seed dispersal, and none have been done in this region. This study will examine if the early stages of regeneration of the large-seeded tree species Anonidium mannii, namely the dispersal capacity and seedling establishment is affected by forest fragment size. We predict that the small fragment size will negatively affect the regeneration capacity of this species. To test this assumption, we will work along a gradient of forest fragment sizes to define the composition of the seed disperser communities. For each disperser assemblage, we will evaluate the quantitative capacity of seed dispersal by combining direct focal observations and camera trapping. A literature review on each disperser species seed retention time and habitat use will allow the computation of the seed dispersal kernels. We will also evaluate the effect of seed ingestion by a presumably important seed disperser, the bonobo, Pan paniscus, on its germination capacity. Seeds will be collected from dung to evaluate the effect of seed ingestion on the rate and velocity of germination. Finally, we will study the predation pressure exerted on dispersed and non-dispersed seeds and seedlings by setting up two sets of seeds below the canopy of parent trees and away from any conspecific trees. One set will be dispersed unprotected to seed predators; another one will be enclosed in a cage and permit seeds to germinate, allowing us to evaluate the herbivores pressure on seedlings. [less ▲]

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See detailDating methods applied to building archaeology
Blain, Sophie ULg; Guibert, Pierre; Hoffsummer, Patrick ULg et al

Poster (2012)

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See detailDémo SDC - Studio Distant Collaboratif
Ben Rajeb, Samia ULg; Leclercq, Pierre ULg

Poster (2012)

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See detailImpact of sequencing design on missing marker imputation and genomic selection in cattle
Druet, Tom ULg; MacLeod, Iona; Hayes, Ben

Poster (2012)

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See detailReproduction et production laitière de bovins sélectionnés ou de races locales au Burundi
Chapaux, Philippe; Knapp, Emilie ULg; Ngiyimbere, S et al

Poster (2012)

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See detailHygrothermal modelling of Lime-Hemp concrete used as building material and indoor climate buffering characterization
Dubois, Samuel ULg; Evrard, Arnaud; Lebeau, Frédéric ULg

Poster (2012)

Hygroscopic building materials can affect the indoor air by exchanging moisture with it and buffering the ambient humidity variations. The Nordtest protocol and the concomitant Moisture Buffer Value (MBV ... [more ▼]

Hygroscopic building materials can affect the indoor air by exchanging moisture with it and buffering the ambient humidity variations. The Nordtest protocol and the concomitant Moisture Buffer Value (MBV) parameter definition has been one of the first attempt to characterize this moisture regulation performance. This paper present an attempt to confront this well-established experimental protocol with a mathematical model implemented in the Comsol multiphysics solver. The power of the simulation will be showed with a good correlation between the modelling and the experimental phase for the MBV determination of a lime-hemp concrete bloc. [less ▲]

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See detailEffect of humic substances on in vitro rooting and acclimatization of Alder (Alnus glutinosa (L.) Gaertn).
Tahiri, Abdelghani ULg; Destain, Jacqueline ULg; Druart, Philippe et al

Poster (2012)

Humic substances (HS) are organic compounds resulting from the physical, chemical and microbiological transformations of organic residues. Present every where in the nature; they are taking part in basic ... [more ▼]

Humic substances (HS) are organic compounds resulting from the physical, chemical and microbiological transformations of organic residues. Present every where in the nature; they are taking part in basic functionalities in any ecosystems involving soils, sediments, waterand landfills. They are heterogeneous and complex carbon macromolecules. Our study aims to compare the effect of HS on in vitro rooting and acclimatization of the Alder species (Alnus glutinosa (L.) Gaertn) as tree growing on river banks or wasted areas. [less ▲]

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See detailCKD-EPI GFR estimating equations in kidney transplantation: which added value for the new cystatin C based equations?
Masson, I; Maillard, N; Kamar, K et al

Poster (2012)

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See detailClassification Trees based on infrared spectroscopic data to discriminate between genuine and counterfeit medicines.
Deconinck, Eric; Sacre, Pierre-Yves ULg; Coomans, Danny et al

Poster (2012)

Due to the extension of the internet, counterfeit drugs represent a growing threat for public health in the developing countries but also more and more in the industrial world. In literature several ... [more ▼]

Due to the extension of the internet, counterfeit drugs represent a growing threat for public health in the developing countries but also more and more in the industrial world. In literature several analytical techniques were applied in order to discriminate between genuine and counterfeit medecines. One thing all these techniques have in common is that they generate a huge amount of data, which is often difficult to interpret in order to see differences between the different samples and to determine the cause of the differences. The majority of the authors make use of explorative chemometric tools to visualise the differences in the data obtained for the different samples. Even if some of the applied methods could be able to give a model with predictive ability, only a few authors created a model able to predict if a sample is counterfeit or not. Classification trees built with the Classification And Regression Tree algorithm were evaluated for modelling infrared spectroscopic data in order to discriminate between genuine and counterfeit drug samples and to classify counterfeit samples in different classes following the RIVM classification system. Models were built for two data sets consisting of the Fourrier Transformed Infrared spectra, the Near Infrared spectra and the Raman spectra for genuine and counterfeit samples of respectively Viagra® and Cialis®. Easy interpretable models were obtained for both models. The models were validated for their descriptive and predictive properties. The predictive properties were evaluated using both cross validation as an external validation set. The obtained models for both data sets showed a 100% correct classification for the discrimination between genuine and counterfeit samples and 83.3% and 100% correct classification for the counterfeit samples for the Viagra® and the Cialis® data set respectively. [less ▲]

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See detailCombining in vivo and in silico experiments to unravel root water uptake dynamics
Lobet, Guillaume ULg; Bhowmick, Suman; Couvreur, Valentin et al

Poster (2012)

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See detailConstruction and pre-validation of a cognitive ergonomics questionnaire for work holding in multiple sclerosis patients : The QUIPSEP
DELRUE, Gaël ULg; MONISSE, Aurélie; Blavier, Adelaïde ULg et al

Poster (2012)

We describe how we build and pre-validate a cognitive ergonomics questionnaire for multiple sclerosis patients actually employed, the QUIPSEP. This questionnaire must help us better manage our patients ... [more ▼]

We describe how we build and pre-validate a cognitive ergonomics questionnaire for multiple sclerosis patients actually employed, the QUIPSEP. This questionnaire must help us better manage our patients and thei potentiel difficulties in work situation from a cognitive ergonomic point of view. [less ▲]

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See detailExtensions of the Background/biResonant decomposition
Denoël, Vincent ULg

Poster (2012)

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See detailHDAC5 depletion modulates heterochromatin plasticity and triggers programmed cell death of human cancer cells
Peixoto, P; Castronovo, V; Matheus, N et al

Poster (2012)

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See detailWhetstones in Gaul: Building a typology
Thiebaux, Aurélie ULg; Goemaere, Eric; Deru, Xavier ULg et al

Poster (2012)

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See detailEffects of Physical Activity on the Aging of Motor and Perceptual Inhibition
Albinet, Cédric; Boucard, Grégory; Collette, Fabienne ULg et al

Poster (2012)

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See detailIncreased number of mucocytes in Aiptasia pallida following heat-induced bleaching
Fransolet, David ULg; Herman, Anne-Catherine; Roberty, Stéphane ULg et al

Poster (2012)

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See detailGeoarcheological aspects of new excavations at the Palaeolithic site of Kulbulak (Uzbekistan)
Flas, Damien ULg; Kolobova, K.; Pavlenok, K. et al

Poster (2012)

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See detailPropofol induced unconsciousness: fMRI total neuronal activity and resting state networks.
Gantner, Ithabi; Guldenmund, Justus Pieter ULg; Gómez, Francisco et al

Poster (2012)

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See detailBelgian experience of robot assisted laparoscopic para – aortic lymphadenectomy for staging of locally advanced cervical carcinoma. A multicentric study.
Fastrez, M; GOFFIN, Frédéric ULg; Vergote, I et al

Poster (2012)

Objectives: FIGO clinical staging, imaging techniques sometimes underestimate extension of locally advanced cervical cancer (LACC). The presence of para-aortic lymph node (LN) metastases in LACC ... [more ▼]

Objectives: FIGO clinical staging, imaging techniques sometimes underestimate extension of locally advanced cervical cancer (LACC). The presence of para-aortic lymph node (LN) metastases in LACC identifies patients with poor prognosis. Laparoscopic para-aortic lymphadenectomy is now proposed as a diagnostic tool. Feasibility and safety of robot assisted laparoscopic para-aortic lymphadenectomy has been reported. We collected data from different Belgian centers to assess its oncological safety and complication rate. Study design: Three centers participated in the study. Thirty seven patients with LACC underwent a pre treatment robot assisted laparoscopic para-aortic lymphadenectomy. Data was prospectively collected. Results: The median number of LN collected was 27.5 (1-54) per patient. Five out of 37 patients had para-aortic node metastasis. The false negative rate for PET CT diagnosing para- aortic node metastasis was 10.8% (4/37). We encountered 2 major intra operative complications (5.4%). Post operative morbidity was low (13.5%). Median follow up was 27 months (95% CI 24–30). Median disease free survival (DFS) was 16 months (95% CI 2.4- 29.6). Patients with negative LN had a median DFS of 24 months (NA) although patients with positive LN had a median DFS of 9 months (95% CI 6.9-11.9). Conclusions: In this series we report that robot assisted laparoscopic para-aortic lymphadencetomy provided the surgeon with useful information to avoid understaging in 10.8% of women with LACC, at the expense of low morbidity (13.5%). Presence of microscopic para-aortic LN metastasis is correlated with shorter DFS. The number of patients with positive LN doesn’t allow us to draw any firm conclusion. [less ▲]

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See detailNeuroimaging of emotional stroop task performance and mood changes in bipolar disorders
Rey, Gwladys; Desseilles, Martin ULg; Favre, Sophie et al

Poster (2012)

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See detailA descriptive study of physico-chemical characteristics of Posidonia oceanica litter accumulation
Lepoint, Gilles ULg; Borges, Alberto ULg; Darchambeau, François ULg et al

Poster (2012)

The Mediterranean seagrass Posidonia oceanica meadow losses every fall the major part of its leaf biomass after senescing. These phytodetritus may decay within the meadow, be buried or be exported to ... [more ▼]

The Mediterranean seagrass Posidonia oceanica meadow losses every fall the major part of its leaf biomass after senescing. These phytodetritus may decay within the meadow, be buried or be exported to other habitats. They form large litter accumulations, notably on shallow water sand patches. Such accumulation host many organisms which participate to the degradation of this material. In a first step to understand the dynamics of these accumulations and of their associated biota, we have characterised their physico-chemical heterogeneity at different seasons. We measured the dissolved oxygen, nutrients and sulphide concentrations in interstitial waters from litter accumulations varying regarding their phytodetritus composition, fragmentation level and thickness. Results show that oxygen conditions were highly variable depending on litter thickness but also on local hydrodynamics. Anoxic conditions and presence of sulphide were sometimes measured, particularly in very thick litter or in degraded litter at the end of summer. Colonies of sulphur-oxidising bacteria were observed. Litter accumulations were also often enriched in ammonium and, sometimes, in dissolved phosphorus. It is not clear whether this results from the litter degradation within the accumulation or whether this is a consequence of a barrier effect between sediment and water column. Nevertheless, this makes litter accumulations particularly attractive for micro-phytobenthic producers. Litter accumulations appear as key habitats both to understand the dead-face of seagrass dynamics and its consequence for C cycle in coastal areas and to study the consequence of hypoxia on biodiversity in a natural context. [less ▲]

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See detailp27(Kip1) as a master regulator of cortical neuron migration.
Godin, Juliette ULg; Thomas, Noémie; Laguesse, Sophie ULg et al

Poster (2012)

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See detailAssessing the role of porosity in composite electrodes through model thin film electrode studies
Krins, Natacha ULg; Shukla, Alpesh K.; Milliron, Delia J. et al

Poster (2012)

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See detailEndocrine factors and AMPKα1 are involved in the spread of hatch and subsequent neonatal performance of broiler chicks
Wang, Yufeng; Li, Yue; Willems, Els et al

Poster (2012)

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See detailModeling of ligand induced changes in the magneto-structural properties of Pd13 cluster
Fresch, Barbara ULg; Remacle, Françoise ULg

Poster (2012)

Palladium nanostructures are widely used as catalyst of many organic reactions1 and present intriguing and controversial magnetic properties. Since the direct experimental determination of ground state ... [more ▼]

Palladium nanostructures are widely used as catalyst of many organic reactions1 and present intriguing and controversial magnetic properties. Since the direct experimental determination of ground state structure for small transition metal clusters is difficult, theory and first-principles calculations, such as density functional theory (DFT), have been used extensively to reveal the interplay between geometric and electronic structure. We present a theoretical study at the DFT/B3LYP level on three selected geometric arrangements for the Pd13 cluster with particular emphasis on the effects of thiolate and phosphine based ligands on their magneto-structural properties. The results point out that the interactions with ligands can change the relative stability of different structures of the metallic core, leading to the stabilization of the more compact icosahedral shape with respect to other bi-layer structures which are more stable in the free standing cluster. Beyond this structural evolution, the interactions with the ligand shell strongly modify also the electronic and magnetic properties of the metal core. In particular, both thiolate and phosphine ligands quench the high spin state that characterized the magnetic ground state of the bare Pd13 cluster, but while the interaction with phosphine quench the magnetic moment completely, the thiol-capped particles retain a permanent magnetic moment even when they are saturated by the ligand molecules. Our study suggests that different ligands can be effectively used to tune electronic and magnetic properties of Pd nanoparticles in view of the design and experimental realization of logic nano devices and intelligent sensors. [less ▲]

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See detailFire promotes downy brome (Bromus tectorum L.) seed dispersal
Monty, Arnaud ULg; Brown, Cynthia; Johnston, Danielle

Poster (2012)

Particularly well-known among the many impacts of the invasive annual grass downy brome (Bromus tectorum, Poaceae) is its ability to alter fire cycles and increase in abundance after fire. However, little ... [more ▼]

Particularly well-known among the many impacts of the invasive annual grass downy brome (Bromus tectorum, Poaceae) is its ability to alter fire cycles and increase in abundance after fire. However, little is known about how fire influences B. tectorum dispersal. We quantified fire effects on B. tectorum dispersal using three recently burned areas in the western region of the Colorado Rocky Mountains by marking diaspores (seeds) with fluorescent powder, and then recovering them at night using ultraviolet lights. Diaspores were of two types: with and without sterile florets attached. We also characterized vegetation cover and near-surface wind speed in burned and unburned areas. Diaspores travelled much farther in burned areas than in nearby unburned areas (means ± standard error at the end of the experiment: 209 ± 16 cm and 38 ± 1 cm, respectively; maximal distance at the end of the experiment: 2274 cm and 150 cm, respectively), indicating an increase in dispersal distance after fire. Diaspores with sterile florets attached dispersed longer distances than those without sterile florets (means ± standard error at the end of the experiment: 141 ± 14 cm and 88 ± 7 cm, respectively). Vegetation cover was lower and wind speeds were higher in the burned areas. Our results indicate that at least one of the mechanisms by which the spread of B. tectorum is promoted by fire is through increased seed dispersal distance. Preventing movement of seeds from nearby infestations into burned areas may help avoid the rapid population expansion often observed. [less ▲]

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See detailEffect of pavement temperature on the macrotexture of a semidense asphalt surface
Luong, Jeanne ULg; Bueno, M.; Vazquez, V.F. et al

Poster (2012)

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Peer Reviewed
See detailIs motor sequence learning impaired in Developmental Coordination Disorder?
Lejeune, Caroline ULg; Catale, Corinne ULg; Schmitz, Xavier ULg et al

Poster (2012)

Developmental Coordination Disorder (DCD) is a developmental disorder characterized by marked impairments in motor skills. Despite its negative impact on daily activities and on cognitive and academic ... [more ▼]

Developmental Coordination Disorder (DCD) is a developmental disorder characterized by marked impairments in motor skills. Despite its negative impact on daily activities and on cognitive and academic performance, the mechanisms underlying this disorder remain largely unknown. One hypothesis that has been proposed is that the poor motor coordination abilities may be attributed to impairments in motor learning and, more specifically, in learning of the correct sequencing of movements (Gheysen et al., 2011). To date, only two studies have directly investigated sequence learning in DCD, but their results are contradictory. The aim of this study was to explore learning of motor sequence in DCD children by means of a modified version of the Serial Reaction Time (SRT) task where the standard keyboard was replaced by a touch screen in order to reduce the impact of the DCD group’s motor difficulties. A total of 34 children (17 with DCD and 17 typically developing (TD) children aged between 6 and 12 years old participated in this study. Results show that DCD children were able to learn the sequence as fast and as accurately as TD children. These findings, showing that children with DCD present the same degree of implicit learning as TD children, differ from those obtained by Gheysen et al. (2011) and so, challenge the motor sequence learning deficit hypothesis. We suggest that differences between studies are not related to an implicit sequence learning deficit per se in children with DCD, but rather to methodological aspects like the response mode used in the studies. [less ▲]

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See detailEffect of water availability on milking frequency and yield of dairy cows milked in pastures by an automatic milking system.
Dufrasne, Isabelle ULg; Robaye, Vincent ULg; Knapp, Emilie ULg et al

Poster (2012)

Nowadays farmers have to manage larger herds but at the same time, want to benefit from a normal social life. The automatic milking system (AMS) can be a solution. Its use can reduce physical labour and ... [more ▼]

Nowadays farmers have to manage larger herds but at the same time, want to benefit from a normal social life. The automatic milking system (AMS) can be a solution. Its use can reduce physical labour and allow flexibility. This technology can result in a reduction in grazing even though grazing is considered as a natural practice of the cows which is appreciated by the consumers. However, the milking frequency is decreased when outdoor grazing rather than an indoor feed systems is combined with automatic milking system (AMS) are combined compared to an indoor system. On pasture, cows tend to visit the AMS by group and enter in close succession. Improved cow traffic would allow increased milking frequency and avoid long waiting before milking. In this aim, effect of water availability in the grazing paddocks on the frequencies of cow visits to was tested. [less ▲]

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See detailSolar Organic Rankine Cycle
Dumont, Olivier ULg

Poster (2012)

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See detailGlycine receptor activation controls interneuron migration by affecting nuclear translocation and myosin phosphorylation
Avila Macaya, Ariel Salvatore ULg; Nguyen, Laurent ULg

Poster (2012)

Previous studies have described the presence of glycine receptor mRNA during early stages of embryonic cortex development. Here, we have tested the functionality of those receptors in migratory ... [more ▼]

Previous studies have described the presence of glycine receptor mRNA during early stages of embryonic cortex development. Here, we have tested the functionality of those receptors in migratory interneurons and demonstrated their involvement in the control of cell migration. We suggest a mechanism whereby activation of glycine receptors during tangential migration activates voltage gated calcium channels and favors influx of calcium that ultimately affect myosin II activity, a mechanism that fine tune nuclear translocation and thus migration speed. [less ▲]

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See detailStudy of agronomic constraints to the dissemination of the cultivation of Jatropha curcas L. in Senegal
Terren, Marieke ULg; Saverys, S.; Jacquet de Haveskercke et al

Poster (2012)

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See detailOncogenic human papillomavirus could directly interact with natural killer cells
Renoux, V; Bastin, R; Langers, I et al

Poster (2012)

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