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See detailLes limites de l’administration de la PCL - R à une population de sujets schizophrènes dans le contexte médico-légal
Englebert, Jérôme ULg; Matteucci, Marie; De Page, Louis et al

Poster (2017, May 31)

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See detailNew data on the Mesozoic radiation of chelonioids
Scavezzoni, Isaure ULg; Fischer, Valentin ULg

Poster (2017, February)

Detailed reference viewed: 13 (1 ULg)
See detailMegaloolithid dinosaur eggs: scrambled parataxonomy and nesting strategies
Jentgen, Benjamin ULg; Stein, Koen; Fischer, Valentin ULg

Poster (2017, February)

Detailed reference viewed: 13 (1 ULg)
See detailGlobal Simulation of UV atmospheric Emissions
Gonzalez-Galindo; Lopez-Valverde; Forget et al

Poster (2017, January 19)

Detailed reference viewed: 8 (1 ULg)
See detailA persistent meteoric layer in Mars' atmosphere
Crismani; Schneider; Plane et al

Poster (2017, January 18)

Detailed reference viewed: 12 (0 ULg)
See detailThree Types of Aurora observed by MAVEN/IUVS: Implications for Mars’ upper Atmosphere Energy Budget
Connour; Schneider; Jain et al

Poster (2017, January 17)

Detailed reference viewed: 12 (1 ULg)
See detailIron, zinc and manganese interaction within the frd3 Arabidopsis mutant
Scheepers, Maxime ULg; Spielmann, Julien ULg; Goormaghtigh, Erik et al

Poster (2017, January 12)

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See detailMacroevolutionary patterns in sea breams, emperors and allies (Sparoidea, Acanthomorpha)
Santini, Francesco; Olivier, Damien ULg; Frederich, Bruno ULg

Poster (2017, January 07)

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See detailIntegrated microfluidic device for the synthesis of SERS substrates
Emonds-Alt, Gauthier ULg; Malherbe, Cédric ULg; Monbaliu, Jean-Christophe ULg et al

Poster (2016, December 19)

The goal of this work is to develop a quantitative analytical method for the glyphosate and its major metabolite the aminomethylphosphonic acid (AMPA) by coupling microfluidics with surface enhanced Raman ... [more ▼]

The goal of this work is to develop a quantitative analytical method for the glyphosate and its major metabolite the aminomethylphosphonic acid (AMPA) by coupling microfluidics with surface enhanced Raman spectroscopy (SERS). This work is divided into 4 axes : (a) bimetallic nanoparticles synthesis in a microreactor, (b) nanoparticles functionnalisation, (c) SERS quantification of glyphosate/AMPA and (d) miniature prototype development composed of axes a to c. The first section aims at the synthesis of bimetallic nanoparticles (Au-Ag, Au-Cu and Ag-Cu) in a microfluidic device. This microfluidic device integrates a first section for the synthesis of monometallic nanoparticles (core) and a second section for the reductive deposition of a second metal (shell). The second axe of this work deals with the functionnalisation of nanoparticles to improve the selectivity of this method for the selected analytes. Two types of functionnalisation are studied : PEGylation (a) with multi-arm PEG ending with -SH and/or (b) with linear heterobifunctionnal PEG. The third axe consists in measuring quantitatively glyphosate and AMPA in different matrices, such as water, urine and fruit juice. Finally, the forth axe deals with the development of a portable detection system to perform on-site analysis. This prototype integrates the microfluidic device for nanoparticles synthesis, their functionnalisation, an injection port followed by a mixing section for the sample and an integrated Raman spectrometer for in-line analysis. [less ▲]

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See detailRaman imaging for diagnostic application
Malherbe, Cédric ULg; Gilbert, Bernard ULg; Eppe, Gauthier ULg

Poster (2016, December 19)

Specific dynamic biochemical compositions and molecular structures characterise healthy cells and tissues. This also stands for pathologies or cellular abnormalities which are accompanied by biochemical ... [more ▼]

Specific dynamic biochemical compositions and molecular structures characterise healthy cells and tissues. This also stands for pathologies or cellular abnormalities which are accompanied by biochemical and molecular changes. Raman spectroscopy can provide unique inputs to correlate the molecular composition and its variations with the diagnosis. In addition, the presence of metal nanoparticles in the molecule vicinity induces a remarkable enhancement (up to 1000000 times) of the Raman signal of small molecules (known as SERS effect). It opens towards applications in the field of trace analysis. In preparation for clinical applications, we evaluate, by Raman mapping, the signal detected from a SERS target deposited on solid state support. [less ▲]

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See detailPrésentation du projet Economie et pratiques des sociétés gravettiennes dans le Nord-Ouest de l’Europe (ECOPRAT)
Touzé, Olivier ULg; Salomon, Hélène ULg; Goutas, Nejma et al

Poster (2016, December 17)

Nous présentons dans cette contribution un projet collectif porté par le Service de Préhistoire de l’Université de Liège et l’équipe Ethnologie préhistorique de l'unité mixte de recherche du CNRS ... [more ▼]

Nous présentons dans cette contribution un projet collectif porté par le Service de Préhistoire de l’Université de Liège et l’équipe Ethnologie préhistorique de l'unité mixte de recherche du CNRS Archéologie et Sciences de l'Antiquité. Le projet « ECOPRAT » entend contribuer au renouvellement des connaissances relatives aux sociétés gravettiennes du Nord-Ouest européen, et prolonger ainsi la dynamique de recherche actuelle touchant ces sociétés (Bodu et al., 2013). Il s’inscrit dans une perspective pluridisciplinaire envisagée grâce à l’association d’études technologiques, tracéologiques et archéozoologiques. Quatre sites majeurs du Nord-Ouest européen ont été retenus : les gisements de plein air de Maisières-Canal (Prov. Hainaut, Belgique) et d’Ormesson – Les Bossats (Seine-et-Marne, France), et les grottes de Goyet (Prov. Namur, Belgique) et du massif d’Arcy-sur-Cure (Yonne, France). Les sites sélectionnés possédant des historiques de recherche spécifiques, la stratégie d’analyse adoptée pour chacun d’eux est développée en adéquation avec l’état des connaissances actuelles. Les recherches sont ainsi guidées par l’obtention de données inédites qui doivent permettre, à terme : 1) une lecture renouvelée et croisée des industries lithiques et osseuses, ainsi que des ensembles fauniques et des matières colorantes découverts dans ces gisements, 2) un rééquilibrage quantitatif et qualitatif de l’intégration des différentes sources documentaires disponibles, la recherche s’étant davantage concentrée depuis plus d’un siècle sur les données de l’industrie lithique. Les deux gisements de plein air réunissent les conditions indispensables au développement d’une approche interdisciplinaire permettant de croiser objets et méthodes d’étude, afin de proposer une lecture fine des comportements techniques et économiques des sociétés gravettiennes. A cet égard, cette contribution est l’occasion de présenter les premiers résultats obtenus sur le site de Maisières-Canal. Les recherches réalisées jusqu’à présent permettent de réévaluer l’importance de l’industrie sur matières dures d’origine animale, au sein de laquelle le travail de l’ivoire de mammouth se révèle particulièrement significatif. En outre, le corpus faunique traduit une exploitation récurrente du lièvre, ce type de comportement s’avérant singulier au regard de ce qui est habituellement documenté chez les sociétés du Gravettien. Parmi les différentes activités susceptibles de laisser une trace archéologique, l’usage de matières colorantes apparaît particulièrement discret dans le cadre spatio-temporel considéré. Cet usage est cependant avéré dans les grottes d’Arcy-sur-Cure (grottes du Renne et du Trilobite), lesquelles permettront ainsi d’entreprendre une étude ciblée de ce phénomène. Enfin, les grottes de Goyet offrent la possibilité de contribuer à la connaissance de la séquence gravettienne du Nord-Ouest européen. Si le long historique des fouilles menées dans ces grottes, ainsi que les mélanges manifestes affectant les collections, ne permettent pas d’envisager une étude approfondie des comportements gravettiens, des observations préliminaires permettent en revanche de s’interroger sur le potentiel de ces sites pour la reconstitution de cette séquence. A l’instar de ce qu’ont montré les travaux récemment conduits sur le Gravettien de Spy (Pesesse & Flas, 2013), il est en effet vraisemblable que les grottes de Goyet aient été occupées à plusieurs moments de la période gravettienne. BODU P., CHEHMANA L., KLARIC L., MEVEL L., SORIANO S., TEYSSANDIER N. (dir.), 2013. Le Paléolithique supérieur ancien de l’Europe du Nord-Ouest : réflexions et synthèses à partir d’un projet collectif de recherche sur le centre et le sud du Bassin parisien, Actes du colloque de Sens, 15-18 avril 2009. Paris : Société préhistorique française (Mémoires de la Société préhistorique française, 56), 516 p. PESESSE D., FLAS D., 2013. Which Gravettians at Spy? In : ROUGIER H., SEMAL P. (eds), Spy Cave. 125 years of multidisciplinary research at the Betche-aux-Roches (Jemeppe-sur-Sambre, Province of Namur, Belgium). Volume I. Bruxelles : Institut royal des Sciences naturelles de Belgique, Société royale belge d'Anthropologie et de Préhistoire, NESPOS Society (Anthropologica et Praehistorica, 123), pp. 257-268. [less ▲]

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See detailCopper toxicity on coral holobiont photosynthetic processes
Georges, Nadège; Richir, Jonathan ULg; Batigny, Antoine et al

Poster (2016, December 16)

Copper (Cu), an essential micronutrient to organisms, may become toxic when present at too high environmental concentrations. This metal remains an aquatic contaminant of concern, notably because of its ... [more ▼]

Copper (Cu), an essential micronutrient to organisms, may become toxic when present at too high environmental concentrations. This metal remains an aquatic contaminant of concern, notably because of its recent re-use as biocide in metal-based antifouling paints. The aim of this study was to monitor the physiological alterations in a zooxanthellate coral species and its endosymbionts (i.e. the coral holobiont) exposed to increasing Cu concentrations. Nubbins of Seriatopora hystrix were exposed for 8 days in 1 L intermittent respirometers to 5 nominal Cu concentrations: 0-2-5-15-50 ppb. Respirometers were maintained at 25.0±0.2°C with successive open/close cycles of 30 min. A 12/12 hours day-night light regime was applied with constant daylight intensity of 200 μmol photons m-2 s-1. Water renewal rate during the 30 min open cycles was 15 mL.min-1. The photosynthetic performances of coral endosymbionts were assessed daily with a fluorescence imaging system (imaging-PAM). At the end of the 8-days experiment, the maximal photochemical quantum yield (FV/FM) of coral nubbins had decreased by 12% and 38%, respectively, in the 15 ppb and 50 ppb treatments. This decrease was even greater for the effective photochemical quantum yield (ɸPSII) with values dropping by 41% and 54%, respectively. Cu exposure also affected the symbiosis between the coral host and its endosymbionts. Nubbins of the 15 ppb treatment slightly lightened from day 6, whilst nubbins exposed to the 50 ppb treatment lightened from day 3, and started to bleach from day 6. The analysis of nubbins’ primary productivity did not coincide with the above observations, the oxygen production within each respirometer remaining relatively constant during the overall experiment for all treatments. This unexpected observation may be the sign of a compensation mechanism. In conclusion, Cu affected the photosynthetic processes of S. histrix within 8 days from relevant environmental concentrations of 15 ppb. The exposure of corals to toxic chemicals thus has to be considered as an additional stressor to, e.g., ocean acidification or elevated temperature, which may disturb their ecophysiology and lead to bleaching. [less ▲]

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See detailFeeding ecology of metamorphic and paedomorphic palmate newts (Lissotriton helveticus) in Larzac
Didaskalou, Emilie; Lejeune, Benjamin ULg; Lepoint, Gilles ULg et al

Poster (2016, December 16)

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See detailBioaccumulation of trace metals in Mytilus galloprovincialis from the Algerian west coast
Rouabhi, Leila; Rouanne, Hassen Omar; Benkrama, Hadjer et al

Poster (2016, December 16)

Algeria has a 1622 km long coastal strip where a large proportion of the population and the main economic and industrial activities of the country are concentrated. Its coastal fringe therefore suffers ... [more ▼]

Algeria has a 1622 km long coastal strip where a large proportion of the population and the main economic and industrial activities of the country are concentrated. Its coastal fringe therefore suffers from various degradations. In particular, the Bay of Oran is housing industrial, commercial, fishing and recreational activities, where 80 % of domestic and industrial wastewaters are not purified before being discharged into the sea. Thus, the aim of the present work was to evaluate the degree of metallic contamination of coastal waters of western Algeria. Trace metals (Zn, Cu, Ni, Fe and Pb) were measured by atomic absorption spectroscopy in the dry soft tissues (gills and gonads) of the mussel Mytilus galloprovincialis Lamarck, 1819 collected during the four seasons of year 2010 in 2 sites: the highly polluted Oran harbor (S1) and Ain Defla (S2), a site distant enough from Oran and presumed little contaminated. Oran harbor was globally more contaminated than Ain Defla, especially for Fe, Zn and Ni. However, Pb levels were higher at Ain Defla with concentrations up to 3.35 ± 0.25 ppm in the gills. Metal concentrations differed between organs. Fe, Zn and Cu were more accumulated in gills (46.91 ± 1.60 ppm, 25.6 ± 1.07 ppm, 2.68 ± 0.50 ppm, respectively) compared to gonads (29.06 ± 1.07 ppm, 21.76 ± 1.46 ppm ppm, 1.44 ± 0.20 ppm, respectively). Each metal followed a seasonal trend, showing concentration peaks during winter and spring for gills and autumn for gonads. This study demonstrated the need to biomonitor the metallic contamination of Algerian coasts. But such monitoring surveys, relying on organisms, will require consensual sampling and analytical protocols to avoid hazardous conclusions due to tissue speciation and accumulation seasonality. [less ▲]

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See detailHead shape disparity of the cod icefishes Trematominae (Notothenioidei, Teleostei)
Frederich, Bruno ULg; Heindler, Franz M.; Dettai, Agnès et al

Poster (2016, December 16)

The suborder Notothenioidei (Teleostei) has undergone a remarkable adaptive radiation in the Southern Ocean. Within this suborder, the subfamily Trematominae is endemic to Antarctic waters and represents ... [more ▼]

The suborder Notothenioidei (Teleostei) has undergone a remarkable adaptive radiation in the Southern Ocean. Within this suborder, the subfamily Trematominae is endemic to Antarctic waters and represents a dominant component of the shelf fish fauna. After recent advances in molecular phylogenetics, 14 species of Trematomus are currently recognized (including Pagothenia and Cryothenia spp.) comprising both considerable morphological and ecological diversity. Here, we aim to illustrate the main axes of shape variation in Trematomus and explore the evolution of their morphology. A dataset of 96 specimens representing 10 species of Trematomus from the collection of the Natural History Museum of Paris was assembled, and landmark-based geometric morphometrics was applied to quantify head shape disparity. Regular regression analysis revealed significant interspecific allometry while a low percentage of shape variation was explained by size (R2 = 0.11; P < 0.001). Main shape variation across species was explored using a principal component (PC) analysis on shape variables. Two groups diverged along PC1: (1) T. bernacchii, T. hansoni, T. pennellii and T. tokarevi have short cephalic profiles with larger cheeks (lowest values along PC1); and (2) T. lepidorhinus, T. eulepidotus and T. newnesi show lengthened cephalic profiles with larger eyes (highest values along PC1). Trematomus scotti differed from all other species mainly along PC3 indicating more elongated cheeks. Phenogram based on Procrustes shape distances will be compared to molecular phylogenetic trees and morphometric data will be mapped onto phylogenetic trees in order to illustrate the mode of phenotypic diversification of Trematomus during evolution. [less ▲]

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See detailExploring a Mediterranean mesozooplankton 13 year time-series.
Fullgrabe, Lovina; Richir, Jonathan ULg; Batigny, Antoine et al

Poster (2016, December 16)

Zooplankton plays diverse crucial roles within the marine ecosystem and can also be used as bio- indicator of climate changes since it is very sensitive to environmental changes. Therefore it is essential ... [more ▼]

Zooplankton plays diverse crucial roles within the marine ecosystem and can also be used as bio- indicator of climate changes since it is very sensitive to environmental changes. Therefore it is essential to consider long-term plankton series. Given the analysis of plankton samples is time- consuming, it requires an effective and rapid analytical method. We have used in this work a supervised learning approach adapted for the semi-automatic classification of digital images of the mesozooplankton of the Bay of Calvi (Corsica, France) by using the Zoo/PhytoImage software. Together with a 11-years long zooplankton time-series, a set of nine environmental variables were monitored in order to identify controlling factors and determine whether the communities were sensitive to global environmental changes. The main components of the mesozooplankton community were characterized by both seasonal and inter-annual variability. Additionally, variation of holoplankton and meroplankton differentiated one from each other. The holoplanktonic community could be split into two subgroups according to its variation in function of the environment: cladocerans and appendicularians, and to a lesser extent, copepods on one hand, and cnidarians, chaetognathes and thaliaceans, on the other hand. Regarding inter-annual variation, one year (2007) showed particularly low production of total zooplankton which was also the case for all the different holoplanktonic taxa. Accounting for that phenomenon were identified some potentially underlying environmental factors. Finally, although water temperature increased significantly over the last years along with the frequency of marine heat wave events, no evident change in the global zooplankton composition was observed yet. [less ▲]

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See detailInsects complex associated with the tropical basil, Ocimum gratissimum L. (Lamiaceae) in southern Benin.
Yarou, Boni Barthélémy ULg; Bokonon-Ganta, H. Aimé; Assogba Komlan, Françoise et al

Poster (2016, December 16)

Tropical basil is an aromatic leafy vegetable used for its medicinal and therapeutic properties in numerous countries in West Africa (Benin, Nigeria, Togo, etc.). In Benin, it is produced on almost all ... [more ▼]

Tropical basil is an aromatic leafy vegetable used for its medicinal and therapeutic properties in numerous countries in West Africa (Benin, Nigeria, Togo, etc.). In Benin, it is produced on almost all urban and periurban garden throughout the year for fresh market. Until now there are few or nearly no publications about the arthropod community of this specie, even less in the context of Benin. Thus, to assess this community, basil plots were mowed using a sweep net in three localities (Ouidah, Togba and Sèmè) of southern Benin. Preliminary results focus on the different insect families that colonized tropical basil in southern Benin environmental conditions. These include: Aphididae (Homoptera), Cercopidae (Homoptera), Chrysomelidae (Coleoptera), Coccinelledidea (Coleoptera), Meloidae (Coleoptera), Braconidae (Hymenoptera), Ichneumonidae (Hymenoptera), Formicidae (Hymenoptera), Vespidae (Hymenoptera), Apoidae (Hymenoptera), Reduviidae (Heteroptera), Pentatomidae (Heteroptera), Pyrgomorphidae (Orthoptera), Acrididae (Orthoptera), Syrphidae (Diptera), Diopsidae (Diptera). Among these families, there are pests: Aphis gossypii G. (Homoptera: Aphididae), Zonocerus variegatus L. (Orthoptera: Pyrgomorphidae), etc.; predators: Ischiodon aegyptius W. (Diptera: Syrphidae), Cheilomenes spp. (Coleoptera: Coccinelledidea), Rhynocoris spp. (Heteroptera: Reduviidae), etc.; parasitoids and pollinators. From this study, it appeared that there is a large diversity of families and functional groups (pests, predators, parasitoids and pollinators) associated with tropical basil . Moreover, the presence of natural enemies could be an advantage for farmers in intercropping systems. This would help reduce the use of synthetic insecticides. This result, which is a first knowledge of the insect fauna associated with tropical basil under the environmental conditions of Southern Benin, will be supplemented by a spatio temporal study to assess the variability and the dynamics of this insect fauna. [less ▲]

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See detailDetermining the Substorm Onset Instability Using Ground and Space-Based Measurements
Rae, Jonathan; Watt, Clare; Murphy, Kyle et al

Poster (2016, December 16)

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See detailEnergy Dissipation in Saturn’s Magnetotail: A Comparative Magnetotail Approach
Yao, Zhonghua ULg; Coates, Andrew; Ray, Licia et al

Poster (2016, December 16)

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See detailTuta absoluta (Lepidoptera: Gelechiidae) ability to develop on potato tubers
Bawin, Thomas ULg; De Backer, Lara ULg; Yarou, Boni Barthélémy ULg et al

Poster (2016, December 16)

Tuta absoluta (Lepidoptera: Gelechiidae) is a widespread pest that threatens commercial production of solanaceous crops. Larvae feed on the mesophyll of all aerial parts of the plants resulting in ... [more ▼]

Tuta absoluta (Lepidoptera: Gelechiidae) is a widespread pest that threatens commercial production of solanaceous crops. Larvae feed on the mesophyll of all aerial parts of the plants resulting in significant yield losses and cosmetic damages.It is classically assumed that underground plant parts are not affected but larval development on potato tubers has recently been suspected. However, this assumption is poorly supported in the literature. Potato tubers might represent an unsuspected mean of persistence and dispersal in agricultural environments.Oviposition tests were here conducted using dormant and active (sprouts less than 5 cm) potato tubers in net cages. Oviposition only occurred on the sprouts of active tubers, supporting larval growth until adult emergency. Tuber dissection revealed burrows starting from sprouts inside the flesh. Additional fitness assays were conducted on non-sprouted tubers and revealed that first instar larvae were able to enter the skin and create burrows, living inside and feeding on potato flesh, although none of them survived. [less ▲]

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See detailIntegrating Non-Collocated Well and Geophysical Data to Capture Lithological Heterogeneity at a Managed Aquifer Recharge and Recovery Site
Gottschalk, Ian; Hermans, Thomas ULg; Caers, Jef et al

Poster (2016, December 15)

Aquifer recharge and recovery (ARR) is the process of enhancing natural groundwater resources and recovering water for later use by constructing engineered conveyances. Insufficient understanding of ... [more ▼]

Aquifer recharge and recovery (ARR) is the process of enhancing natural groundwater resources and recovering water for later use by constructing engineered conveyances. Insufficient understanding of lithological heterogeneity at ARR sites often hinders attempts to predict where and how quickly infiltrating water will flow in the subsurface, which can adversely affect the quality and quantity of available water in the ARR site. In this study, we explored the use of electrical resistivity tomography (ERT) to assist in characterizing lithological heterogeneity at an ARR site, so as to incorporate it into a flow and contaminant transport model. In this case, we had non-collocated well core log data and ERT data from a full-scale ARR basin. We compared three independent methods for producing conditional lithology-resistivity probability distributions: 1) a search template to relate the nearest logged well lithologies with ERT resistivity panels, given search criteria; 2) a maximum likelihood estimation (MLE) to match bimodal normal distributions to the histogram of each ERT line; and 3) variogram-based lithology indicator simulations constrained to well data. Each approach leverages Bayes’ Rule to estimate lithology probability given electrical resistivity. The simplest approach (method 1) yields an erroneous conditional probability function where sand dominates the conditional probability at nearly all resistivities, due in part to the strong presence of sand in the wells nearest the ERT lines. The approaches using MLE and lithology simulations (methods 2 and 3) produce similar, more realistic lithofacies probability functions. The range of resistivities where clay and sand overlap differs between methods 2 and 3: ranging between 100 and 200 ohm-m for method 2, and between 30 and 50 ohm-m for the method 3. These differences affect the posterior lithology distributions in multiple point geostatistical (MPS) simulations, and in turn, predictions of flow from models which integrate these results. To test the models, we can compare measured breakthrough times of recharged water at the site to groundwater flow simulation results using the lithofacies models created by each method. The methods described here can inform the integration of non-collocated geophysical data into a variety of applications. [less ▲]

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See detailQualité des médicaments antipaludéens et caractéristiques des pharmacies des territoires périurbains de Kinshasa
Mavungu Landu, Don Jethro ULg; Liégeois, Sophie; Manzambi Kuwekita, Joseph ULg et al

Poster (2016, December 14)

Contexte: Le paludisme causé par le Plasmodium falciparum demeure un problème majeur de santé publique. Le traitement avec des antipaludiques de bonne qualité est une composante importante dans le ... [more ▼]

Contexte: Le paludisme causé par le Plasmodium falciparum demeure un problème majeur de santé publique. Le traitement avec des antipaludiques de bonne qualité est une composante importante dans le contrôle de cette maladie. Cependant en Afrique centrale, plus de 25% des médicaments serait contrefaits ou de qualité inférieure, situation qui serait encore plus dramatique dans les territoires périurbains. Méthode: Dans le contexte ci-mentionné, une étude préliminaire et prospective a été menée dans la zone de santé de Mont Ngafula 1 située dans les territoires périurbains de la Ville de Kinshasa durant la période allant du 22 février au 17 mars 2016. Treize échantillons de poudre pour suspension d’artéméther et de luméfantrine ont été collectés. L’analyse de la qualité de ces médicaments a été réalisée au moyen de méthodes séparatives génériques utilisant la technique de chromatographie liquide à haute performance couplé à un détecteur à barrettes de diodes. Une caractérisation a été également effectuée dans 127 établissements pharmaceutiques sur base des normes édictées par le Ministère de la Santé Publique congolais. Résultats: Les résultats des analyses des échantillons d’antimalariques (ou antipaludéens) montre que presque la moitié des poudres pour suspension d’artéméther et de luméfantrine ne contenait pas la concentration prévue en artéméther et/ou en luméfantrine. Par ailleurs, le résultat des observations évoque qu’aucun établissement pharmaceutique ne respecte l’ensemble des normes du Ministère de la Santé Publique. [less ▲]

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See detailElectrical Resistivity Monitoring of Heat Tracer to Characterize Lab-Scale Hydraulic Conductivity Distributions
Adetokunbo, Peter; Hermans, Thomas ULg; Oware, Erasmus

Poster (2016, December 14)

Knowledge of the spatial variations of hydraulic conductivity (K) is crucial to almost every hydrogeological investigation. The representative scale of K estimates from traditional slug and pumping tests ... [more ▼]

Knowledge of the spatial variations of hydraulic conductivity (K) is crucial to almost every hydrogeological investigation. The representative scale of K estimates from traditional slug and pumping tests are, however, inadequate to accurately predict hydrogeological processes. There is increasing interest in the application of electrical resistivity tomography (ERT) to quantify spatially continuous K variations. ERT estimation of high-resolution K distributions, however, requires continuous injection of saline tracer (ST) into an aquifer over an extended period, which is feasible but impractical. Here, we present electrical resistivity thermography (ERTh) to evaluate the potential application of time-lapse ER monitoring of heat tracer (HT) to characterize high-resolution K architectures. Unlike ST, long term HT experiments are comparatively easier to manage and repeatable with minimal environmental impact. We estimate K variations via petrophysical coupling of flow and heat transport with joint time-lapse ER and discrete multi-level temperature breakthrough curves. We illustrate the strategy with a 2-D lab-scale sandbox experiment. To construct the heterogeneous field, three lenses with high-K properties with each consisting of gravel, coarse sand, and a mixture of coarse and fine sand, were created within a background of comparatively low-K fine sand. The experiment involved continuous injection and extraction of heat, respectively, at the left and right boundaries of the lab-scale aquifer. We simultaneously performed time lapse ER monitoring of the heat transport and temperature measurements at four discrete multi-levels near the heat extraction well. Results of the coupled inversions demonstrate that ER monitoring of heat tracer provides a unique opportunity to characterize high-resolution spatially continuous K variations, which seems more practical for field applications in contrast to that of the traditional ST. [less ▲]

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See detailThe complex behavior of the satellite footprints at Jupiter: the result of universal processes?
Bonfond, Bertrand ULg; Grodent, Denis ULg; Badman, Sarah V. et al

Poster (2016, December 14)

At Jupiter, some auroral emissions are directly related to the electromagnetic interaction between the moons Io, Europa and Ganymede on one hand and the rapidly rotating magnetospheric plasma on the other ... [more ▼]

At Jupiter, some auroral emissions are directly related to the electromagnetic interaction between the moons Io, Europa and Ganymede on one hand and the rapidly rotating magnetospheric plasma on the other hand. Out of the three, the Io footprint is the brightest and the most studied. Present in each hemisphere, it is made of at least three different spots and an extended trailing tail. The variability of the brightness of the spots as well as their relative location has been tentatively explained with a combination of Alfvén waves’ partial reflections on density gradients and bi-directional electron acceleration at high latitude. Should this scenario be correct, then the other footprints should also show the same behavior. Here we show that all footprints are, at least occasionally, made of several spots and they all display a tail. We also show that these spots share many characteristics with those of the Io footprint (i.e. some significant variability on timescales of 2-3 minutes). Additionally, we present some Monte-Carlo simulations indicating that the tails are also due to Alfvén waves electron acceleration rather than quasi-static electron acceleration. Even if some details still need clarification, these observations strengthen the scenario proposed for the Io footprint and thus indicate that these processes are universal. In addition, we will present some early results from Juno-UVS concerning the location and morphology of the footprints during the first low-altitude observations of the polar aurorae. These observations, carried out in previously unexplored longitude ranges, should either confirm or contradict our understanding of the footprints. [less ▲]

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See detailSolar electrons observed in the magnetosphere
Shi, Quanqi; Wang, linghua; Zong, Qiugang et al

Poster (2016, December 12)

Detailed reference viewed: 14 (3 ULg)
See detailXenogeneic graft-versus-host disease: Impact of Th17 cells.
Delens, Loïc ULg; SERVAIS, Sophie ULg; Vrancken, Louise et al

Poster (2016, December 08)

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See detailFACILITER L'ADHÉRENCE AU TRAITEMENT IMMUNOSUPPRESSEUR CHEZ LES TRANSPLANTÉS DU REIN- TEST D'UN SYSTEME DE COACHING PAR SMARTPHONE
Saint-Remy, Annie ULg; Spiroux, Marie; WEEKERS, Laurent ULg et al

Poster (2016, December 08)

Facilitate adherence to immunosuppressive treatment in kidney transplant recipients – test of a coaching system with smartphone application A.Saint-Remy, M. Spiroux, L. Weekers, C. Bonvoisin, JM ... [more ▼]

Facilitate adherence to immunosuppressive treatment in kidney transplant recipients – test of a coaching system with smartphone application A.Saint-Remy, M. Spiroux, L. Weekers, C. Bonvoisin, JM. Krzesinski Introduction: Nonadherence to immunosuppressants is a determining cause of graft loss. The present study tested during 1 month, the usefulness and the effectiveness of a coaching system using smartphone application (the Transplant Smartcoach®) on adherence in kidney transplant recipients. Methodology: The sample included 51 patients (28m/23w) transplanted for 1 year at least, mean age 52±12 years, mean graft survival 3.7±1 years. Each patient had a smartphone configured with its detailed treatment. Using the smartphone application, patient had to notify daily the intake of each tablet into a 2-hour window. If no notification was performed 1 hour later than the scheduled time of intake, the patient was contacted by a nurse to remind him to take medications. Results: 90 % of patients were treated with Tacrolimus and 10 % with cyclosporine, associated with mycophenolic acid (41 %) or mycophenolate mofetil (49 %), 41 % had corticosteroids. Whatever was the immunosuppressant, a perfect adherence (medications taken at the scheduled time) was observed on average in 53 % of the morning monthly intakes. There was no difference in adherence rates between the morning intakes of Advagraf ® (once/day) and Prograft® (2 times/day), a decrease of perfect adherence was identified with the evening intake of Prograft® (53 % vs 44%; P=0.07) and the one of Myfortic® (P=0.03) with consequently an increased frequency of nurse’s recalls. Adherence was lower in younger patients and in those still working. The complexity of treatment (many drugs intake/day) and the respect for time intervals between drug intakes were the major barriers to adherence. When compared to the one measured before using the Smartcoach, the variability (coefficient of variation, %) of the Tacrolimus trough level decreased by 32.6 % (P=0.027) in the 3 to 6 months following the test. Conclusion: patients appreciated the ease and usefulness of the coaching system with smartphone application to help medication adherence. Coupled with therapeutic education of the patients, that tool deserves to be used notably in newly transplanted patients and when a worrying decrease in adherence is observed to help them in the management of a rigorous adherence which should contribute to graft survival. [less ▲]

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See detailIntegrated continuous flow photoreactors: Photooxidation of (L)-methionine with singlet oxygen
Emmanuel, Noémie ULg; Mendoza Gallego, Carlos ULg; Lismont, Marjorie ULg et al

Poster (2016, December 08)

Development of photochemistry in macroscopic batch reaction vessels is hampered due to inherent limitations: light penetration remains superficial, resulting in inhomogeneous irradiation and hence to side ... [more ▼]

Development of photochemistry in macroscopic batch reaction vessels is hampered due to inherent limitations: light penetration remains superficial, resulting in inhomogeneous irradiation and hence to side-reactions or product degradation due to overexposure. The recent implementation of photochemical processes in microreactors under continuous-flow conditions appeared to be much more powerful than its batch analogue in terms of irradiation efficiency and light penetration. Furthermore, the fine control of residence time ensures an accurate control of the irradiation time, avoiding side-reactions and degradation. The photooxidation of (L)-methionine with singlet oxygen using Rose Bengal as a sensitizer was successfully implemented in a microreactor setup and led to total and selective conversion into methionine sulfoxide, an important building block for the organic synthesis of peptides or functionalized amino acid. The reaction was performed in 2 min while the same reaction in batch took 2h. [less ▲]

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See detailImplication of Importin-8 in mouse brain development
Nganou, Gerry ULg; Coumans, Bernard ULg; De Nijs, Laurence et al

Poster (2016, December 06)

Importin-8 (IPO8) is a protein that regulates the nucleocytoplasmic transport of some proteins important for cerebral development (Ago2, c-Jun, Smad4). In HEK cells, IPO8 seems to not plays others roles ... [more ▼]

Importin-8 (IPO8) is a protein that regulates the nucleocytoplasmic transport of some proteins important for cerebral development (Ago2, c-Jun, Smad4). In HEK cells, IPO8 seems to not plays others roles (like mitotic spindle formation, primary cilium transport). In situ hybridization performed in mouse brains slices shows that IPO8 is already expressed at E14. Moreover, inhibition of its action (IPO8) in embryonic mouse brain leads to impairment of neuroblast migration to upper cortical layers. IPO8 could then be at the origin of some pathologies with neuronal migration deficit. [less ▲]

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See detailOviposition deterring effect of Ocimum basilicum L. (Lamiaceae) on Tuta absoluta Meyrick (Lepidoptera: Gelechiidae)
Yarou, Boni Barthélémy ULg; Bawin, Thomas ULg; Boullis, Antoine ULg et al

Poster (2016, December 02)

Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is one of the most important pests of tomato, reducing crop yield in greenhouses and fields, in several countries around the world. Because synthetic ... [more ▼]

Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is one of the most important pests of tomato, reducing crop yield in greenhouses and fields, in several countries around the world. Because synthetic insecticides lead to resistance and have adverse effects on natural enemies and producers’ health, there is a need for alternatives. In this study, we assess the oviposition deterring effect of O. basilicum using dual-choice behavioral assays performed in flight tunnels. Two modalities were tested, i.e. (1) a tomato plant associated either with an O. basilicum plant versus a tomato plant associated with a plastic pot only filled with potting soil, and (2) a tomato plant with basil essential oil (EO) formulated in paraffin oil (PO) versus a tomato plant with PO only. A 1 ml cylindrical polyethylene plug loaded with 100 µl of solution (formulated EO or PO) was placed on each plant as a diffuser. Forty-eight hours after the release of unsexed adult individuals randomly sampled from the rearing in the central area of the tunnel, we found that plants and EOs reduced T. absoluta oviposition behavior on a nearby located tomato plant. GC-MS analyses showed that the major constituents include estragol (73.8%), linalool (8.6%), β-elemene (2.9%) in O. basilicum essential oils and E-α-bergamotene (38.9%), methyl eugenol (26.1 %), E-β-ocimene (17.7 % ) in O. basilicum VOCs collected with solid-phase micro-extraction method. These results suggest a valuable potential of O. basilicum and associated essential oils as component of an integrated management strategy against the tomato leafminer. [less ▲]

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See detailLe profil en fibres alimentaires de légume modifie leur fermentation intestinale et la production d’acides gras à chaine courte dans modèle in vitro humain
Kalala Bolokango, Gaetan ULg; Kambashi Mutiaka, Bienvenu ULg; Njeumen, Patrick et al

Poster (2016, December 01)

La modulation du microbiote intestinal induite par les fibres alimentaires (DF)a des conséquences positives sur la santé, notamment sur l’obésité et ses comorbidités. La nature et l’ampleur des ... [more ▼]

La modulation du microbiote intestinal induite par les fibres alimentaires (DF)a des conséquences positives sur la santé, notamment sur l’obésité et ses comorbidités. La nature et l’ampleur des changements dépendent du type de fibres.Les légumes sont des sources privilégiées de DF, certaines espèces et variétés fournissant davantage de DF solubles (SDF), d’autres étant plus riches en DF insolubles (IDF). Contrairement aux SDF, les IDF sont souvent considérées comme peu fermentescibles, ne contribuant que faiblement à une modulation de l’écophysiologie intestinale. En opposition à cette hypothèse, pour explorer si l’impact potentiel sur la santé intestinale des légumes varie suivant leur nature, des légumes présentant des teneurs et des profils en DF différents ont été comparés dans un modèle in vitro de fermentation colique. [less ▲]

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See detailGeneralized Pascal triangles and binomial coefficients of words
Stipulanti, Manon ULg

Poster (2016, December 01)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word. Similarly to the Sierpinski gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we describe and study the first properties of the subset of [0, 1] × [0, 1] associated with this extended Pascal triangle modulo a prime p. From the extended Pascal triangle obtained when p is equal to 2, we derive a sequence of which we study the regularity and the asymptotic behavior of the summatory function. Inspired from this regularity, we extend our results to another famous numeration systems, namely the Zeckendorff numeration system. [less ▲]

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See detailIntramolecular continuous-flow strategy towards methylphenidate (Ritalin) hydrochloride
Gerardy, Romaric ULg; Winter, Marc; Vizza, Alessandra et al

Poster (2016, December)

threo-Methylphenidate hydrochloride is the most widely prescribed drug to treat attention deficit hyperactivity disorder (ADHD). Herein we present the batch-to-flow translation of a carbene-based ... [more ▼]

threo-Methylphenidate hydrochloride is the most widely prescribed drug to treat attention deficit hyperactivity disorder (ADHD). Herein we present the batch-to-flow translation of a carbene-based intramolecular strategy for the diastereoselective preparation of this active pharmaceutical ingredient. The process relies on the thermal generation and decomposition of a hazardous diazospecies, its thermal intramolecular C-H insertion reaction yielding an intermediate β-lactam, and its subsequent acidic methanolysis, giving enriched threo-methylphenidate hydrochloride in 70% isolated yield. The automated microfluidic setup telescopes 2 chemical transformations, 1 intermediate in-line purification and sustains a daily productivity of 20.4 g/day of methylphenidate hydrochloride. The preparation of the β-lactam is implemented on mesoscale in a pilot-scale continuous-flow reactor, providing 4.25 kg of this key intermediate per day. [less ▲]

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See detailDevelopment and comparison of liposomes and nanocapsules as injectable nanocarriers for poorly aqueous soluble drugs
Karim, Reatul ULg; Palazzo, Claudio ULg; Laloy, Julie et al

Poster (2016, December)

About 90% of drugs in development phase have poor aqueous solubility. Liposomes and nanocapsules are promising approaches that enable parenteral administration of these drugs with possibilities of site ... [more ▼]

About 90% of drugs in development phase have poor aqueous solubility. Liposomes and nanocapsules are promising approaches that enable parenteral administration of these drugs with possibilities of site specific delivery. The objective of the study was to develop different liposomes and lipid nanocapsules entrapping a hydrophobic model molecule (apigenin (AG)), and to characterize and compare them as potential injectable nanocarriers (NCs) for drugs with low aqueous solubility. [less ▲]

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Peer Reviewed
See detailMultianalytical Study of “Le Sorcier d’hiva Oa” by Gauguin
Defeyt, Catherine ULg; Remon, Regine; Strivay, David ULg

Poster (2016, December)

Although there is abundant literature on the worldwide famous French painter, Paul Gauguin, very little is known concerning his painting techniques and materials. The present research aims to throw a new ... [more ▼]

Although there is abundant literature on the worldwide famous French painter, Paul Gauguin, very little is known concerning his painting techniques and materials. The present research aims to throw a new light on Gauguin’s œuvre through the in depth study of Le Sorcier d’ Hiva Oa, painted by Gauguin during his stay in French Polynesia in 1902, by means of non-invasive imaging and analytical techniques. While the infrared reflectography examination of the painting revealed how the artist achieved his final composition, the results obtained by Raman spectroscopy and X ray fluorescence spectroscopy in punctual and mapping modes allowed identifying the different pigments he combined to obtain the bright color shades characterizing this artwork. [less ▲]

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See detailImportin-8 mutations could cause Jeavons Syndrome, CAE and JME by altering early neuroblast migration
Nganou, Gerry ULg; Coumans, Bernard ULg; De Nijs, Laurence et al

Poster (2016, December)

Le syndrome de Jeavons (JS) est une forme rare d'épilepsie juvénile. Dans des familles affectées par la JS, le gène de l'importin-8 (IPO8), un membre de la superfamille des protéines karyopherines, a été ... [more ▼]

Le syndrome de Jeavons (JS) est une forme rare d'épilepsie juvénile. Dans des familles affectées par la JS, le gène de l'importin-8 (IPO8), un membre de la superfamille des protéines karyopherines, a été retrouvé muté. Les karyopherines sont connues pour réguler le transport nucléo-cytoplasmique de nombreuses protéines. IPO8, un membre de la sous-famille ß-karyopherin, contrôle le transport Ago-2, c-Jun et Smad-4, trois protéines importantes pour le développement du cerveau. Ici, nous montrons que IPO8 est bien exprimée dans le cerveau de la souris au stade embryonnaire. De plus, l'inhibition de l'ARNm d'IPO8 par l'électroporation in utéro (IUE) de shRNA, altère la migration des neuroblastes de même que la surexpression par IUE des formes mutées d'IPO8 humaine. Ainsi, le développement anormal du cerveau dû aux mutations dans le gène de l'IPO8, pourrait être à l'origine du JS, l'absence d'enfance évolutive et/ou de l'épilepsie myoclonique juvénile. [less ▲]

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See detailEtude de l’évolution de la pathologie arthrosique et des propriétés mécaniques du cartilage sur un modèle d’arthrose spontanée chez le cobaye Dunkin-Hartley
Legrand, Catherine ULg

Poster (2016, December)

Dans les modèles animaux, la gravité des lésions du cartilage est appréciée grâce à des scores histologiques évaluant la structure, le contenu en protéoglycane, l’intégrité de la tidemark, la cellularité ... [more ▼]

Dans les modèles animaux, la gravité des lésions du cartilage est appréciée grâce à des scores histologiques évaluant la structure, le contenu en protéoglycane, l’intégrité de la tidemark, la cellularité, ainsi que les ostéophytes. Parallèlement à ces analyses histologiques, nous avons étudié les propriétés mécaniques du cartilage à différents stades d’évolution de la maladie chez le cobaye Dunkin-Hartley. Nous avons également corrélé la sévérité des lésions histologiques avec les propriétés mécaniques du cartilage. [less ▲]

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See detailNEW INJECTABLE LIPOSOME AND DRUG-IN-CYCLODEXTRIN-IN LIPOSOME SYSTEMS ENCAPSULATING ESTETROL FOR THE TREATMENT OF ISCHEMIA DISEASES IN PREMATURE BABIES
Palazzo, Claudio ULg; Laloy, Julie; Delvigne, Anne-Sophie et al

Poster (2016, December)

Purpose: In 2010, almost 15 million of babies in the world are prematurely borned, 11.1 % of the total amount of alive children. Despite the better neonatology techniques, the number of preterm babies ... [more ▼]

Purpose: In 2010, almost 15 million of babies in the world are prematurely borned, 11.1 % of the total amount of alive children. Despite the better neonatology techniques, the number of preterm babies with motor, vision, hearing or mental deficiencies is still constant along the last twenty years. Moreover, no efficacy treatment is available to the present day. The estetrol (E4) has an important role in the brain development and protection. The aim of this study is to develop new injectable liposome and drug-in-cyclodextrin-in-liposome (DCL) formulations, encapsulating E4 in order to enhance its crossing through the blood-brain barrier (BBB). Methods: Cyclodextrins (CD) were used to increase E4 aqueous solubility. Liposome and DCL (E4-CD complex) formulations were prepared by thin-film hydration technique. The formulations were physicochemical characterized. LDH and MTS tests on endothelial, neuronal and BBB model cells were performed in vitro on the liposome formulation. Hemocompatibility of the formulations was evaluated on red blood cells, platelet aggregation and coagulation. BBB passage tests were performed using human BBB cell line (hCMEC/D3). Results: E4-CD complexes proportionally increased the solubility of the hormone. Liposomes and DCL encapsulating E4 were prepared. All the formulations had average particle size below 150 nm, polydispersity index below 0.10 and ζ potential around + 30 mV. The encapsulation efficacy for liposomes was between 3% and 10% while those of DCL are between 15% and 35%. Moreover, the formulations are capable to release 80 % (liposome) and 90 % (DCL) of encapsulated E4 after 3 h at 37°C. The effect of liposome and DCL formulations on cell viability and integrity was evaluated. The results showed no toxic effects on all the tested cell lines. Hemocompatibility tests showed no hemolysis, platelet aggregation or effects on coagulation, confirming the possibility of the formulations to be intravenously administrated. BBB passage tests highlighted the capability of the formulations to pass the BBB and reach the brain. Conclusions: New non-toxic, hemocompatible liposome and DCL formulations encapsulating E4 were prepared. The formulations are promising drug delivery system to target estrogens to the brain, due to their physiochemical characteristics. [less ▲]

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See detailMobility of 137Cs, 10Be and 210Pb in soil as a function of the soil texture, organic matter content and pH
de Tombeur, Félix ULg; Cornu, Sophie; Bourlès, Didier et al

Poster (2016, November 30)

Vertical matter transfer processes (bioturbation and <2μm translocation) in soils and their dynamics are up to now poorly constrained although they are responsible for the temporal evolution of the ... [more ▼]

Vertical matter transfer processes (bioturbation and <2μm translocation) in soils and their dynamics are up to now poorly constrained although they are responsible for the temporal evolution of the ecosystem services. In order to better constrain and quantify these processes, a kinetic quantification of the involved transfers based on vertical profiles of 210Pb (xs), 10Be and 137Cs has been developed for Luvisols in which soluble transfers could be neglected. The range of applicability of this type of approach was nevertheless not tested. In this work, we analyzed 210Pb (xs), 10Be and 137Cs in soils exhibiting gradients of organic matter, pH and < 2 μm fraction (Podzol, Andosol Ferralsol, Leptosol). Acidic soils and large organic matter contents were considered. The depth distribution of the studied isotopes was then interpreted as a function of the organic matter content, the soil pH and its < 2 μm fraction. This demonstrates that 10Be and 137Cs losses occur under soluble form in the Podzol, especially under forest, more acid, for the latter. Soluble 10Be transfers were also identified in the Andosol when they were considered as negligible in the Leptosol. For 210Pb (xs), soluble transfers are also probable for soils with pH less than 5.5 (Andosol and Ferralsol) and strong affinity for organic matter has been demonstrated. Thus, under acidic conditions and low < 2 μm fraction, soluble transfer cannot neglected anymore. [less ▲]

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See detailThe influence of specific training on the plyometric profile
Jidovtseff, Boris ULg; Harris, Nigel; Carpent, Nicolas et al

Poster (2016, November 30)

Sprinting, jumping and change of direction involve the stretch-shorten cycle (SSC) and therefore plyometric training is used to improve these factors. It has been demonstrated that the jumping strategy ... [more ▼]

Sprinting, jumping and change of direction involve the stretch-shorten cycle (SSC) and therefore plyometric training is used to improve these factors. It has been demonstrated that the jumping strategy utilized can influence the biomechanical profile of the exercise and subsequent adaptation. For example, in some cases, it is important to jump as high as possible while in other cases it is important to reduce the ground contact time. Our hypothesis is that the choice of plyometric exercise has to be matched to the desired biomechanical adaptation. Hence we investigated the influence of 8 weeks of different programs on the plyometric profile of recreational athletes. In each of five groups, very specific exercises were selected according to the training objective: ground contact time group (CT, n=9); vertical jump height group (JH, n=9); CT and JH combination group (CT-JH, n=11); JH + strength training group (JH-S, n=9); and control group (CO, n=8). The plyometric profile performed prior to and post training included measures of jump height, contact time, stiffness and reactivity at different bounding intensities. The results demonstrated that JH and JH-S programs were more effective for improving jump height performance (+7-9%; p<0.005) compared to insignificant jump height changes in the CT and CO groups. CT-JH was the most effective on the reactivity index (+14%, p<0.005) although significant increases (+8%, p<0.05) were also observed in CT, JH and JH-S groups. CT was the only group to significantly decrease short contact time (-5%, p<0.05). ANOVA analysis revealed significant groups*session effect for jump height (p<0.01) and reactivity (p<0.005) but not for short contact time. The present study confirms that the principle of specificity is fundamental in plyometric training so the exercise selection should be developed cognizant of intended adaptations. Jump height and reactivity appear to be differentially affected by specific training practices. [less ▲]

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See detailForce-Velocity-Power Profiles in Elite Young Soccer Players
Miny, Kevin ULg; Jidovtseff, Boris ULg

Poster (2016, November 30)

The main purpose of this research was to assess the isoinertial Force-Velocity-Power (F-V-P) profile in young elite soccer players. Furthermore, this research aims to compare force, velocity and power ... [more ▼]

The main purpose of this research was to assess the isoinertial Force-Velocity-Power (F-V-P) profile in young elite soccer players. Furthermore, this research aims to compare force, velocity and power qualities among different age categories (under (U) 17, U19 & U21). The ultimate objective is to better understand the relationships between neuromuscular system and functional performance. [less ▲]

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See detailInvolvement of Ikbζ in glioblastomas and its potential implication in radioresistance
Dubois, Nadège ULg; Willems, Marie; Kroonen, Jérôme et al

Poster (2016, November 29)

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See detailViral glycoprotein gp150 promotes sexual transmission of Murid Herpesvirus-4
Zeippen, Caroline ULg; Javaux, Justine ULg; Xiao, Xue ULg et al

Poster (2016, November 28)

Gammaherpesviruses are important pathogens in human and veterinary medicine. During co-evolution with their hosts, they developed many strategies allowing them to shed infectious particles in presence of ... [more ▼]

Gammaherpesviruses are important pathogens in human and veterinary medicine. During co-evolution with their hosts, they developed many strategies allowing them to shed infectious particles in presence of immune response. Understanding these strategies is likely to be important to control infection. Interestingly, we recently observed that Murid herpesvirus 4 (MuHV-4), a gammaherpesvirus infecting laboratory mice, could be sexually transmitted between mice. This model offers therefore the opportunity to understand the mechanisms underlying natural transmission. Some of these mechanisms could rely on the glycoprotein 150 (gp150), which could limit virus neutralization and promote the release of infectious particles from cells. In this study, we tested therefore the importance of gp150 in the context of MuHV-4 sexual transmission. Briefly, female mice were infected with WT or gp150- strains expressing luciferase. They were imaged with an in vivo imaging system to follow infection. When lytic replication was observed in the genital tract, infected females were mated with naïve males to compare the capacity of transmission of the two strains. Our results show that, while the gp150- strain has no deficit in reaching and replicating in the female genital tract, it displays a major deficit of sexual transmission in comparison with WT virions. Interestingly, this deficit appears to reflect a deficit of virions release from vaginal epithelial cells. Altogether, our results show that, while gp150 is not required for efficient dissemination and maintenance of MuHV-4 within its host, it is essential for efficient transmission, by promoting the releasing of infectious particles from the mucosal cells. [less ▲]

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See detailL'activation comportementale est-elle pertinente pour tous les adultes dépressifs ? Une analyse en clusters
Wagener, Aurélie ULg; Baeyens, Céline; Van der Linden, Martial ULg et al

Poster (2016, November 26)

INTRODUCTION : L’hétérogénéité de la dépression est de plus en plus mise en évidence en termes de profils de symptômes, de réponse au traitement, etc. Les théories comportementales de la dépression ... [more ▼]

INTRODUCTION : L’hétérogénéité de la dépression est de plus en plus mise en évidence en termes de profils de symptômes, de réponse au traitement, etc. Les théories comportementales de la dépression soulignent l’importance de l’inactivité ainsi que des faibles niveaux de plaisir et de fréquence d’activités plaisantes dans le maintien de la dépression. Cette étude poursuit deux objectifs : (1) investiguer l’hétérogénéité de la depression via une analyse en clusters, (2) investiguer les valeurs prédictives de l’inactivité ainsi que des faibles niveaux de plaisir et de fréquence d’activités plaisantes sur la dépression en fonction du cluster d’appartenance. METHODE : Des adultes tout venant et/ou consultant des centres de santé mentale ont été recrutés (âge entre 18 et 60 ans). Ils ont complété l’Inventaire de Dépression de Beck – Seconde Edition, l’Echelle d’Activation Comportementale pour la Dépression – Version courte, et l’Inventaire des événements plaisants. RESULTATS : Une solution en six clusters a été mise en évidence : “gros dormeurs/heavy sleepers”, “dépressifs cognitifs/cognitive depressives”, “dépressifs affectifs-somatiques/affective-somatic depressives”, “dépressifs légers/mild depressives”, “dépressifs dormant peu/sleepless depressives”, “dépressifs typiques/typical depressives”. Des relations significatives entre inactivité, fréquence d’activités plaisantes et dépression ont seulement été observées chez les “dépressifs cognitifs/cognitive depressives”, les “dépressifs légers/mild depressives” et les “dépressifs typiques/typical depressives”. DISCUSSION : Les résultats confirment l’hétérogénéité de la dépression puisque six clusters ont été mis en évidence. Par ailleurs, l’activation comportementale ne semble pertinente que pour trois de ces clusters dans lesquels les postulats du modèle comportemental de la dépression sont confirmés (“dépressifs cognitifs/cognitive depressives”, “dépressifs légers/mild depressives”, “dépressifs typiques/typical depressives”). [less ▲]

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See detailLa Perspective Temporelle Equilibrée: Validation d’un questionnaire et relation avec la régulation émotionnelle.
Barsics, Catherine ULg; Rebetez, Marie My Lien; Rochat, Lucien et al

Poster (2016, November 26)

La Perspective Temporelle Equilibrée fait référence à une disposition individuelle caractérisée par le fait de se projeter mentalement dans le futur et dans le passé de manière positive et fréquente ... [more ▼]

La Perspective Temporelle Equilibrée fait référence à une disposition individuelle caractérisée par le fait de se projeter mentalement dans le futur et dans le passé de manière positive et fréquente. L’objectif de notre étude était de valider la version française d’une échelle, initialement conçue en anglais, évaluant cette orientation temporelle : la “Balanced Time Perspective Scale” (Webster, 2011). Une étude en ligne a permis de recueillir les données de 622 participants francophones issus de la population générale. Les résultats indiquent que la version française réplique la structure en deux facteurs du questionnaire original et plaident en faveur d’une bonne validité de construit. De surcroît, les résultats montrent qu’une tendance importante à se projeter mentalement dans le futur et dans le passé de manière positive et fréquente est associée à la réévaluation cognitive, une stratégie de régulation émotionnelle. En somme, ce questionnaire permet d’évaluer la perspective temporelle, qui est ici envisagée en tant qu’importante ressource pour le self, et ce, en étroite relation avec les capacités de régulation émotionnelle. [less ▲]

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See detailEducation, Complexity of Work, and Incident Cognitive Impairment in Puerto Rican Older Adults
Andel, Ross; Luisa, Ana; Small, Brent et al

Poster (2016, November 18)

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See detailLimited impact of imatinib in a murine model of sclerodermic chronic graft-versus-host disease
Belle, Ludovic; Fransolet, Gilles ULg; SOMJA, Joan ULg et al

Poster (2016, November 17)

Background: Graft-versus-host disease (GVHD) remains one of the major complications following haematopoietic stem cell transplantation (HSCT). Approximately 15% of the patients with chronic GVHD develop ... [more ▼]

Background: Graft-versus-host disease (GVHD) remains one of the major complications following haematopoietic stem cell transplantation (HSCT). Approximately 15% of the patients with chronic GVHD develop the sclerodermatous form of the disease characterized by multiple organ fibrosis and loss of skin elasticity. Several studies have shown the potential benefits of imatinib, a tyrosine kinase inhibitor, as a treatment of fibrosis in cGVHD due to its ability to inhibit simultaneously PDGF-R and c-Abl pathways which are both involved in fibrosis mechanisms. This work investigates the possible benefits of imatinib on fibrosis in a murine model of sclerodermatous chronic GVHD (sclcGVHD). Methods: Lethally irradiated Balb/cJ mice (7 Gy TBI) were injected i.v. with 10.106 bone marrow cells and 70.106 splenocytes from B10.D2 donnor mice. Mice were then treated with sterile water or imatinib (150 mg/kg/day) by oral gavage from day +7 to day +52 following transplantation. GVHD severity was assessed three times/week with a scoring system encompassing 5 criteria (mice posture, weight loss, activity, hair loss, skin integrity ; 0-1-2 point(s)/criteria). Results: Our results show that imatinib failed to prevent/improve GVHD with a similar evolution of the GVHD severity with no differences between groups. Histological analyses indicate a significant reduction of the phosphorylation level of the PDGR receptor (p = 0,033) and a trend to a decreased level of phosphorylated c-Abl (p = 0,1854). In vivo cell proliferation assay with CFSE were also performed and showed a reduced proliferation of T cells and subsets (CD4, CD8 and Tregs) in spleen, lymph nodes, bone marrow and blood after imatinib treatment. Finally, FACS analyses performed on days +21 and +35 after transplantation did not show any differences in the absolute T-cell counts. Conclusion: Although we have observed a decreased phosphorylation level of PDGR receptor and less proliferation of T cells and subsets in vivo, imatinib failed to alleviate scl-cGVHD in a murine model of severe scl-cGVHD. [less ▲]

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See detailHot-Melt Extrusion as a Continuous Manufacturing Process to Form Ternary Cyclodextrin Inclusion Complexes
Thiry, Justine ULg; Krier, Fabrice; Ratwatte, Shenelka et al

Poster (2016, November 16)

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See detailZinc, iron and manganese interaction within the frd3 Arabidopsis mutant
Scheepers, Maxime ULg; Spielmann, Julien ULg; Goormaghtigh, Erik et al

Poster (2016, November 16)

Zinc and iron are two essential micronutrients for plants. The homeostasis networks of the two metals are intertwined. Arabidopsis halleri is a zinc- and cadmium-tolerant and zinc-hyperaccumulating ... [more ▼]

Zinc and iron are two essential micronutrients for plants. The homeostasis networks of the two metals are intertwined. Arabidopsis halleri is a zinc- and cadmium-tolerant and zinc-hyperaccumulating species, which also present adaptation of its iron homeostasis(1,4). Transcriptomic studies identified genes which are constitu-tively over-expressed in Arabidopsis halleri compared to Arabidopsis thaliana and which may have a role in metal tolerance or accumulation(2-4). Among them, a candidate gene encodes the FRD3 (FERRIC REDUCTASE DEFECTIVE 3) protein, a member of the MATE family of membrane transporters. FRD3 is a citrate transporter involved in iron homeostasis(5-7) and plays a role in zinc tolerance in A. thaliana(8). The FRD3 gene displays a complex regulation. In A. thaliana, alternative transcript initiation for FRD3 determines two transcripts, which dif-fer in their 5'UTRs and have differential translation efficiency. The two transcripts are selectively regulated under stress conditions: iron and zinc depletion, zinc excess or cadmium presence(9). In A. halleri, a single highly ex-pressed FRD3 transcript with high translation efficiency is present(9). [less ▲]

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See detailDevelopment of a new method for arabidopsides extraction and purification
Genva, Manon ULg; Andersson, Mats X; Nasir, Mehmet Nail ULg et al

Poster (2016, November 16)

In the present work, a new method for arabidopsides extraction and purification was developed.

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See detailDifferent and synergistic effect of 5-Azacytidine and Rapamycin on ex vivo expansion of natural human T Regulatory cells
Conteduca, Giuseppina ULg

Poster (2016, November 16)

Natural T regulatory cells (Treg) are challenging to expand ex vivo, and this has severely hindered in vivo evaluation of their therapeutic potential. 5-Azacytidine (5-azaC) and Rapamycin (RAPA) are ... [more ▼]

Natural T regulatory cells (Treg) are challenging to expand ex vivo, and this has severely hindered in vivo evaluation of their therapeutic potential. 5-Azacytidine (5-azaC) and Rapamycin (RAPA) are immunosuppressive drugs that promote selectively the expansion of CD4+CD25highFoxp3+ regulatory T cells. We investigated whether 5-azaC and RAPA could be used together to promote the ex vivo expansion of Tregs purified from adult human peripheral blood. : We found that 5-azaC helped maintain FOXP3 expression during the expansion process probably by promoting the conversion of T conventional (Tconv) in Treg, instead Rapa induces selectively apoptosis in Tconv cells and expansion in Treg. Addition of 5-azaC to RAPA treated cultures improved gene expression of FOXP3, CD25, STAT5 and TGF-B resulted in enhanced Treg expansion and suppressive activity. Also Rapa and 5-AzaC combination sustain Bcl-2 protein expression in Treg conferring resistance to apoptosis process. 5-azaC may have utility in ex vivo expansion of human Tregs, not as a single agent, but in combination with RAPA. These data may considerably accelerate the development of immunotherapeutic approaches for the treatment of autoimmune disease or posttransplant alloreactions by the adoptive transfer of nTreg cells. [less ▲]

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See detailStudy of the evolution of the osteoarthritis pathology and the mechanical properties of cartilage in a spontaneous osteoarthritis model in the Dunkin-Hartley guinea pigs.
Legrand, Catherine ULg; Centonze, Prescilia ULg; Comblain, Fanny ULg et al

Poster (2016, November 16)

In animal models, the severity of cartilage damage is assessed by histological scores evaluating the structure, the proteoglycan content, the integrity of the tidemark, the cellularity, and osteophytes ... [more ▼]

In animal models, the severity of cartilage damage is assessed by histological scores evaluating the structure, the proteoglycan content, the integrity of the tidemark, the cellularity, and osteophytes. In parallel to these histological analyzes, we studied the mechanical properties of cartilage at different stages of disease progression in the Dunkin-Hartley guinea pigs. We also correlated the severity of histological lesions with the mechanical properties of cartilage. [less ▲]

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See detailPolyphenol content and antioxidant capacity in various commercial juices
Matute Matute, Alexis Fernando ULg; Tabart, Jessica; CHERAMY-BIEN, Jean-Paul ULg et al

Poster (2016, November 16)

Antioxidants are enzymes, non-enzymatic proteins, minerals micronutrients, vitamins, phenolic compounds, pigments and others. Polyphenols have the ability to reduce or prevent damage caused by free ... [more ▼]

Antioxidants are enzymes, non-enzymatic proteins, minerals micronutrients, vitamins, phenolic compounds, pigments and others. Polyphenols have the ability to reduce or prevent damage caused by free radicals promoting positive effects on human health due to their antioxidant capacity. In this study we evaluated the content of polyphenols from several commercial biological (n = 6) and conventional juices (n = 6 ) (orange, blackcurrant, apple, grapes, tomato, carrot, pomegranate, lemon, grapefruit juices) and we determined the antioxidant effect by inhibition of the superoxide anion production measured by chemiluminescence technology. Conventional juices (orange, apple, tomato, pomegranate, lemon, grapefruit juices) showed more total polyphenolics (+ 32%), more flavan-3-ols (+ 67%) and more flavonols (+ 42%) than the same biological juices. The presence of anthocyanins was reported in juices made with blackcurrant, pomegranate and grapes only, with values above 50 µg/mL, regardless of their nature. Surprisingly, chemiluminescence results showed an inhibition in superoxide anion production by 51% for biological juices vs 23% in conventional ones. The correlation between total polyphenol content and antioxidant capacity of all the juices was r = 0.83 (r2 = 0.7). The fact that there is less polyphenols and higher antioxidant activity in bio juices could be related to the concentration and the type of polyphenol present. [less ▲]

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See detailA crucial role for cdk1 in postnatal hippocampal neurogenesis
Marlier, Quentin ULg

Poster (2016, November 15)

Cdk1 seems to be involved in the proliferation and differentiation of adult neural stem cells found in the adult dentate gyrus

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See detailElektrodynamische Fragmentierung von Elektroschrott
Iseli, Cédric; Streicher-Porte, Martin; Martino, Rémi ULg et al

Poster (2016, November 11)

Untersuchungen dazu werden in diesem Bericht am Beispiel von WEEE und speziell an Leiter-platten aufgezeigt. Die Versuche zeigen, dass EDF für verschiedenste Arten von Elektroschrott eingesetzt werden ... [more ▼]

Untersuchungen dazu werden in diesem Bericht am Beispiel von WEEE und speziell an Leiter-platten aufgezeigt. Die Versuche zeigen, dass EDF für verschiedenste Arten von Elektroschrott eingesetzt werden kann. Verschweisste Kompaktgeräte können zum Beispiel so weit geöffnet werden, dass die ge-wünschte Komponente freigelegt und entfernt werden kann. Leiterplatten haben die Eigenschaft, dass bei kontinuierlich steigendem Energieeintrag zuerst die aufgebrachten Komponenten abgetrennt werden, bevor die Cu-Bahnen freigelegt werden. Bei noch höherem Energieeintrag wird die Leiterplatte schlussendlich zerkleinert und vollständig zer-stört. Durch diese Entfrachtung der Leiterplatte kann ein metallreiches Konzentrat hergestellt werden. [less ▲]

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See detailEndocrine disruptors and parasitism: which effects on the sex behaviour of the amphipod Gammarus pulex ?
Fivet, Adeline; Horion, Sibylle; Thomé, Jean-Pierre ULg et al

Poster (2016, November 10)

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See detailBulk high-temperature superconducting hollow cylinders used for magnetic shielding: effect of an initial trapped field on the shielding performances.
Wera, Laurent ULg; Fagnard, Jean-François ULg; Hogan, Kevin ULg et al

Poster (2016, November 09)

Bulk High-Temperature Superconductors (HTS) can be used as efficient passive magnetic shields with performances exceeding those of conventional ferromagnetic materials. The most common geometry for a ... [more ▼]

Bulk High-Temperature Superconductors (HTS) can be used as efficient passive magnetic shields with performances exceeding those of conventional ferromagnetic materials. The most common geometry for a superconducting shield is a bulk hollow cylinder. In this work, we investigate the magnetic shielding properties when the tube is not in the virgin state. Such a situation happens in practice when the tube has been initially subjected to a first magnetic field. The induced superconducting currents that are flowing in the tube generate a trapped magnetic moment which may deteriorate the shielding of a second field. Here we study experimentally how an initial trapped moment affects the shielding of a magnetic field, when they are both perpendicular to each other. In particular, we focus on the effect of an axial trapped moment on the transverse shielding performances and on the effect of a transverse trapped field on the axial or the transverse shielding performances. Finally, we show how the pristine state of the tube can be restored when applying an external field of adequate amplitude. The consequence for practical applications is that it is possible to recover shielding properties similar to those obtained in the virgin state without heating up the shield above its critical temperature TC. [less ▲]

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See detailSevere deficiency of the somatotrope GHRH/GH/IGF-1 axis induces a dramatic susceptibility to Streptococcus pneumoniae infection.
Farhat, Khalil ULg; Bodart, Gwennaëlle ULg; Desmet, Christophe ULg et al

Poster (2016, November 07)

Deletion of the growth hormone-releasing hormone gene (Ghrh) results in a severe deficiency of the somatotrope GHRH-GH-IGF-1 axis causing dwarf phenotype that can be reversed by GH or GHRH supplementation ... [more ▼]

Deletion of the growth hormone-releasing hormone gene (Ghrh) results in a severe deficiency of the somatotrope GHRH-GH-IGF-1 axis causing dwarf phenotype that can be reversed by GH or GHRH supplementation (Alba & Salvatori, Endocrinology 2004;145:4134). In basal conditions, the immunological phenotype of Ghrh-/- mice is not markedly disturbed except for a decrease in B cells and an increase in generation of thymic (t) Treg cells (submitted for publication). These data prompted us to investigate immune responses of Ghrh-/- mice using vaccination and infection by S. pneumoniae as models since the response to both stimuli rely on the innate immune system and B cells. Ghrh-/- mice were unable to trigger production of specific IgM and IgG against serotype 1 pneumococcal polysaccharide (PPS) after vaccination with either native PPS (Pnx23) or protein-PPS conjugate (Prev-13) vaccines. A short GH supplementation to Ghrh-/- mice (1 daily injection of 1 mg/kg GH for 4 weeks) restored IgM and IgG response to Pnx23 vaccine but not to Prev-13. This suggests that GH differently impacts on B-1, marginal zone B-2 or innate B-1 B cells. Furthermore, after intranasal instillation of a non-lethal dose of serotype 1 S. pneumoniae, Ghrh-/- mice exhibited a dramatic susceptibility reflected by bacteremia 24h after infection and a survival limit of 72 h, compared to WT C57BL/6 mice that need only 24h to clear infection. The possible impact of GH deficiency on components of the innate immune system that play an important role in defense of the respiratory tract against pneumococcal infection is under current investigation. (*Equal first and last authors. KF is supported by a research grant from the Lebanese Government; GB is Research Assistant, CD is Research Associate, and VG is Research Director at the NFSR of Belgium). [less ▲]

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See detail« Cap-Haïtien » or « how to ‘construct’ a flood risk in a decade »
Gracius, Gracia Joseph; Ozer, Pierre ULg

Poster (2016, November 04)

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See detailRecent evolution of the coastline in the Gulf of Guinea. Example of Togo and Benin (2000-2015)
Ozer, Pierre ULg; Hountondji, Yvon-Carmen; de Longueville, Florence

Poster (2016, November 04)

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See detailImpact of shoreline changes on population in Cotonou, Benin
de Longueville, Florence; Hountondji, Yvon-Carmen; Gemenne, François ULg et al

Poster (2016, November 04)

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See detailPeople moved and will move again
Gemenne, François ULg; de Longueville, Florence; De Bruyckere, Luka ULg et al

Poster (2016, November 04)

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See detailRisk management in Ivory Coast : Case Study of Population Evictions in Port-Bouët, Abidjan
Comoe, Raymond; Ozer, Pierre ULg

Poster (2016, November 04)

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See detailTerminologia Multilíngue de Clínica General / Medicina de Família e Comunidade
Jamoulle, Marc ULg; Treuherz, Arthur; Gomes, Luis Filipe et al

Poster (2016, November 02)

Creation of the Q-Codes online knowledge base The list of themes, called Q-Codes has been elaborated in a bottom-up approach, by retrieving, in a qualitative analysis study, the themes most frequently ... [more ▼]

Creation of the Q-Codes online knowledge base The list of themes, called Q-Codes has been elaborated in a bottom-up approach, by retrieving, in a qualitative analysis study, the themes most frequently addressed by GPs when they meet in congresses. A taxonomy has been build. A multilingual terminological record has been developed for each of the 182 items identified. This work is freely available online on www.hetop.eu/Q (free access after inscription) and is supported by the Rouen (France) biomedical informatics department of the University of Rouen (France). All the data are available in the Web Ontology language (OWL-2), an ontology-ready format fit for future use in the semantic web. The product, user guide and e-learning are available on http://3cgp.docpatient.net/ The Q-codes base is aimed at several uses: • Online repository of knowledge specific to GP/FM in several languages • Online PubMed linked bibliographic system easy to use for training in GP/FM • Resource for online e-learning • Resource for analysis of content of congresses in GP/FM in joint usage with ICPC-2 and indexation of gray literature • Research area : o automatic or semi-automatic congresses indexation system o linking GP/FM to the web of data and the linked data initiative The multilingual terminology in GP/FM Out of the online database we are proud to present you the • General Practice / Family Medicine Multilingual Terminology – English version • Terminologia Multilíngue de Clínica Geral / Medicina de Família e Comunidade - Versão em Português • Terminología multilingüe de la medicina general y de familia- Versión española • Terminologie multilingue de médecine générale et de famille – Version française • Een meertalige terminologie in de huisartsgeneeskunde - Nederlandse versie • Từ điển thuật ngữ đa ngôn ngữ về y học tổng quát và y học gia đình – (Vietnamese) • -Codes and definitions will be also available online in Korean and Turkish Those 6 books (60 pages) are readable / downloadable freely online on http://3cgp.docpatient.net/ and contain an explanation of the elaboration process of the taxonomy, a tabular list of the Q-Codes, the list of their definitions and an index. [less ▲]

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See detailRobustness of spatial autocorrelation tests
Ernst, Marie ULg

Poster (2016, November)

Spatial autocorrelation expresses the dependence between values at neighbouring locations. Testing if the spatial autocorrelation is significant may confirm or deny the need to consider spatial analysis ... [more ▼]

Spatial autocorrelation expresses the dependence between values at neighbouring locations. Testing if the spatial autocorrelation is significant may confirm or deny the need to consider spatial analysis over the classical one. Indeed, the analysis of spatial data is only meaningful if the spatial components bring information. Several measures of spatial autocorrelation are defined in the literature. Moran’s index, Geary’s ratio and Getis-Ord statistic are the most used statistics. Tests based on these measures have been developed in the literature using asymptotic and permutation results. They are used in practice in many fields, for instance in geography, economics, biogeosciences, medicine, ... However, these tests should be cautiously applied because they are not robust. A single contaminated observation can significantly modify their results. This poster is composed of two parts. Firstly, the robustness of already available tools for measuring spatial autocorrelation will be analysed. Secondly, alternative methods will be proposed to robustly test the spatial autocorrelation. [less ▲]

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See detailL’âgisme chez les étudiants en médecine
Corvol, Aline; Missotten, Pierre ULg; Gentric, Armelle et al

Poster (2016, November)

Introduction: Des stéréotypes négatifs liés à l’avancée en âge sont fréquemment observés en population générale. Des études ont montré que ces stéréotypes sont plus puissants que ceux liés à l’origine ... [more ▼]

Introduction: Des stéréotypes négatifs liés à l’avancée en âge sont fréquemment observés en population générale. Des études ont montré que ces stéréotypes sont plus puissants que ceux liés à l’origine ethnique, au sexe ou à l’orientation sexuelle. Lorsqu’ils sont présents chez les soignants, ces stéréotypes peuvent entrainer des discriminations et limiter l’accès aux soins des personnes âgées (Schroyen et al., 2016). Il a en outre été démontré qu’un comportement d’aide injustifiée pouvait favoriser la perte d’autonomie chez une personne âgée. L’objectif de cette étude est d’évaluer la force des stéréotypes âgistes chez les étudiants en médecine et de rechercher les facteurs qui y sont associés. Méthodes: Un questionnaire écrit informatisé a été proposé aux étudiants en médecine des facultés de Rennes, Brest et Liège, de la 2ème à la 6ème année. Il associe trois mesures : l’Adaptation française de Fraboni Scale of Ageism, une tâche de fluence verbale à propos du vieillissement et de la jeunesse, et une mesure de la stigmatisation liée à l’âge par estimation de pourcentages. Résultats: Des données ont été obtenues pour 570 étudiants à Rennes et 485 à Liège; le recueil de données se poursuit à Brest. Les premières analyses confirment que l’âgisme est largement répandu chez les étudiants en médecine, avec des résultats globalement similaires à Rennes et Liège. Les étudiants de sexe masculins, ceux qui ont peu de contact avec des personnes âgées, ou qui ont des contacts jugés de mauvaise qualité, sont plus susceptibles d’exprimer des stéréotypes âgistes. Le fait d’avoir fait un stage dans un service de gériatrie ou d’avoir bénéficié d’un enseignement de la gériatrie ne semble pas influencer significativement ces stéréotypes. Conclusion: L’enseignement de la gériatrie aux étudiants en médecine doit prendre en compte la fréquence des stéréotypes âgistes. Nos résultats étant soumis à un biais de désirabilité sociale, des études portant sur les stéréotypes implicites (inconscients) seraient utiles. Une meilleure connaissance de l'âgisme et de ses déterminants chez les étudiants en médecine est nécessaire à l'élaboration d'approches pédagogiques susceptibles de limiter les conséquences de ces stéréotypes sur la qualité des soins aux personnes âgées [less ▲]

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See detailSpeech style manipulations in dysarthria in French-speaking children: Acoustic findings.
Ancelle, Josephine; Moya Gale, G.; Hetrick, B et al

Poster (2016, November)

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See detailPreoptic glutamate and estradiol release during male sexual behavior
de Bournonville, Catherine ULg; de Bournonville, Marie-Pierre ULg; Aourz, Najat et al

Poster (2016, November)

Beside its long-term control by steroids, male sexual behavior is also modulated by neuroestrogens in a dynamic way (within minutes) in a number of species ranging from fishes to mammals. Studies in male ... [more ▼]

Beside its long-term control by steroids, male sexual behavior is also modulated by neuroestrogens in a dynamic way (within minutes) in a number of species ranging from fishes to mammals. Studies in male Japanese quail have also identified following exposure to a receptive female a rapid decrease in the activity of brain aromatase (AA) the enzyme responsible for the conversion of androgens into estrogens. These effects occur mainly within the medial preoptic nucleus (POM), a sexually dimorphic structure of the preoptic area that plays a key role in the activation of male sexual behavior and contains the highest AA in the brain. In vitro studies demonstrated that AA can be rapidly inhibited by calcium-dependent phosphorylations of the enzyme triggered by the activation of AMPA and kainate receptors. We confirmed here this rapid effect of glutamate on AA by injecting kainate in the POM of anesthetized males and measuring AA in the tissue after brain collection. AA in POM was inhibited in the kainate-injected hemisphere compared to the control hemisphere injected with vehicle. In a second experiment, we showed by in vivo microdialysis that glutamate is released in POM during copulation. These results thus suggest that glutamate controls dynamic changes of AA that occur in the brain during sexual interactions. To confirm that the decrease in AA leads to an actual reduction of local estradiol concentration, we quantified via microdialysis and radioimmunoassay changes in estradiol concentration in the male POM during sexual interactions with a female. Surprisingly, a dramatic elevation of estradiol was observed during copulation. Estradiol has been shown to enhance acutely male sexual motivation, therefore the function of its increase in the POM could be to maintain motivation during the entire sexual encounter. The decrease of AA observed ex vivo after copulation would then reflect a compensatory mechanism to restore baseline pre-copulatory conditions. Importantly, these results highlight that although long-term changes in AA are often used as a proxy for local estradiol concentrations, these two measures can show major short-term discrepancies possibly reflecting variations in estrogen turnover. [less ▲]

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See detailComparisons of estimated GFR and Cockcroft Gault equations: calibration against relative risk for all-cause mortality.
Warnock, DG; van den Brand, JAJG; DELANAYE, Pierre ULg et al

Poster (2016, November)

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See detailGlomerular filtration rate in healthy living potential kidney donors: a meta-analysis.
Pottel, H; Hoste; DELANAYE, Pierre ULg

Poster (2016, November)

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See detailSilurian palynomorphs from the Precordillera basin, western Argentina: biostratigraphy and diversity trends
Garcia Muro, V.J.; Rubinstein, C.V.; Steemans, Philippe ULg

Poster (2016, October 27)

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See detailSpecific interests in Autism with versus without speech onset delay : the importance of perceptually versus thematically organized interests
Chiodo, Liliane ULg; Eusèbe, Sandrine; Majerus, Steve ULg et al

Poster (2016, October 25)

To explore whether autistic adults with versus without speech delay also differ in the perceptual vs thematic nature of their specific interests.

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See detailA benchmark for urban flood modelling
Arrault, Anaïs; Finaud-Guyot, Pascal; Archambeau, Pierre ULg et al

Poster (2016, October 25)

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See detailThermochemical conversion of sugar industry by-products to biofuel
Nicodème, Thibault ULg; Jacquet, Nicolas ULg; Richel, Aurore ULg

Poster (2016, October 24)

Poster concernant la conversion des co-produits de l'industrie sucrière en biocarburants via la voie thermochimique. Description des procédés tels que la gazéification, Fischer-Trospch, la pyrolyse.

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See detailImpacts de champignons entomopathogènes sur la biologie et le comportement de la punaise diabolique (Hemiptera, Pentatomidae)
Fingu Mabola, Junior Corneille ULg; Serteyn, Laurent ULg; Bawin, Thomas ULg et al

Poster (2016, October 22)

Halyomorpha halys Stål, la punaise diabolique, est une espèce invasive préoccupante en provenance d’Asie de l’Est. En moins de 15 années, elle a colonisé près de l’ensemble des Etats-Unis d’Amérique ... [more ▼]

Halyomorpha halys Stål, la punaise diabolique, est une espèce invasive préoccupante en provenance d’Asie de l’Est. En moins de 15 années, elle a colonisé près de l’ensemble des Etats-Unis d’Amérique, occasionnant des pertes de rendement considérables dans les vergers et les cultures en champs ainsi que des nuisances dans les habitations durant l’hiver. La punaise diabolique a été recensée en Suisse en 2007, et il est à craindre qu’elle colonise la presque totalité de l’Europe d’ici 2020. Cette étude a pour objectif de prévenir l’installation de la punaise diabolique dans les pays européens en se focalisant sur le contrôle biologique. Des scientifiques américains ont développé une stratégie « attirer et tuer » basée sur la phéromone d’agrégation de la punaise diabolique et des pesticides. D’autres ont montré l’efficacité d’un champignon pathogène d’insectes (Beauveria bassiana strain GHA. Afin d’établir un contrôle rapide du ravageur en Europe, compatible avec l’agriculture biologique, une idée serait de combiner l’effet attractif de la phéromone d’agrégation et l’application de spores de B. bassiana. Dans cette étude, l’impact du champignon sur la mortalité de l’insecte et son autodissémination sont évalués. [less ▲]

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See detailComportement du puceron du pois face aux volatiles du basilic.
Yarou, Boni Barthélémy ULg; Boullis, Antoine ULg; Verheggen, François ULg et al

Poster (2016, October 22)

Les pucerons font partie des insectes qui causent des dégâts d’importances économiques sur une grande diversité de plantes cultivées. Les insecticides de synthèse généralement utilisés pour les contrôler ... [more ▼]

Les pucerons font partie des insectes qui causent des dégâts d’importances économiques sur une grande diversité de plantes cultivées. Les insecticides de synthèse généralement utilisés pour les contrôler montrent de plus en plus leurs limites (résistance), et sont néfastes pour l’homme et l’environnement. Dans la recherche de méthodes de lutte alternatives, le comportement de choix d’Acyrthosiphon pisum Harris (Homoptera : Aphididae) exposé à des sources d’odeurs de plant de fèves (Vicia fabae L.) et du basilic européen (Ocimum basilicum L.) à l’aide d’un olfactomètre en Y a été étudié. Les observations de cette expérience montrent que les pucerons se dirigent préférentiellement vers la source d’odeurs de fève et y passent plus de temps. Ce résultat montre que les volatiles du basilic ont un effet répulsif sur les pucerons du pois. D’autres tests seront évalués sur des espèces de pucerons plutôt généralistes afin de valider l’effet répulsif du basilic sur les pucerons. [less ▲]

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Peer Reviewed
See detailPhysiological Responses to training and competition in 1 to 4 star eventing horses
Kirsch, Katharina ULg; Düe, M.; Holzhausen, H. et al

Poster (2016, October 21)

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See detailReported post-operative analgesic administration to non-human primates: 2010 - 2015
Bertrand, Henri ULg; Flecknell, Paul; Brady, James et al

Poster (2016, October 21)

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