References of "Poster"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailARE CAPABILITY INDICES USEFULL TO ASSESS ANALYTICAL METHODS VALIDITY ?
Rozet, Eric ULiege; Bouabidi, Abderrahim ULiege; Talbi, M. et al

Poster (2012, February)

Analytical methods capability evaluation can be a useful methodology to assess the fitness of purpose of these methods for their future routine application. However, care on how to compute the capability ... [more ▼]

Analytical methods capability evaluation can be a useful methodology to assess the fitness of purpose of these methods for their future routine application. However, care on how to compute the capability indices has to be made. Indeed, the commonly used formulas to compute capability indices such as Cpk, will highly overestimate the true capability of the methods. Especially during methods validation or transfer, there are only few experiments performed and, using in these situations the commonly applied capability indices to declare a method as valid or as transferable to a receiving laboratory will conduct to inadequate decisions. In this work, an improved capability index, namely Cpk-tol and the corresponding estimator of proportion of non conforming results ( ) is proposed. Through Monte-Carlo simulations, they have been shown to greatly increase the estimation of analytical methods capability in particular in low sample size situations as encountered during methods validation or transfer. Additionally, the usefulness of this capability index is illustrated through several case studies covering applications commonly encountered in the pharmaceutical industry. Finally a methodology to determine the optimal sample size required to validate analytical methods is also given using the proposed capability metric. [less ▲]

Detailed reference viewed: 119 (6 ULiège)
Full Text
See detailQuantifications en supergéométrie
Leuther, Thomas ULiege

Poster (2012, February)

Le poster présente de façon vulgarisée certaines idées sous-jacentes à la recherche de quantifications invariantes en supergéométrie.

Detailed reference viewed: 49 (17 ULiège)
Full Text
Peer Reviewed
See detailCOMBINATION OF INDEPENDENT COMPONENT ANALYSIS, DESIGN OF EXPERIMENTS AND DESIGN SPACE FOR A NOVEL METHODOLOGY TO DEVELOP CHROMATOGRAPHIC METHODS
Rozet, Eric ULiege; Debrus, Benjamin ULiege; Lebrun, Pierre ULiege et al

Poster (2012, February)

As defined by ICH [1] and FDA, Quality by Design (QbD) stands for “a systematic approach to development that begins with predefined objectives and emphasizes product and process understanding and process ... [more ▼]

As defined by ICH [1] and FDA, Quality by Design (QbD) stands for “a systematic approach to development that begins with predefined objectives and emphasizes product and process understanding and process control, based on sound science and quality risk management”. A risk–based QbD–compliant approach is proposed for the robust development of analytical methods. This methodology based on Design of Experiments (DoE) to study the experimental domain models the retention times at the beginning, the apex and the end of each peak corresponding to the compounds of a mixture and uses the separation criterion (S) rather than the resolution (RS) as a Critical Quality Attribute. Stepwise multiple linear regressions are used to create the models. The estimated error is propagated from the modelled responses to the separation criterion (S) using Monte Carlo simulations in order to estimate the predictive distribution of the separation criterion (S) over the whole experimental domain. This allows finding ranges of operating conditions that will guarantee a satisfactory quality of the method in its future use. These ranges define the Design Space (DS) of the method. In chromatographic terms, the chromatograms processed at operating conditions within the DS will assuredly show high quality, with well separated peaks and short run time, for instance. This Design Space can thus be defined as the subspace, necessarily encompassed in the experimental domain (i.e. the knowledge space), within which the probability for the criterion to be higher than an advisedly selected threshold is higher than a minimum quality level. Precisely, the DS is defined as “the multidimensional combination and interaction of input variables (e.g., material attributes) and process parameters that have been demonstrated to provide assurance of quality” [1]. Therefore, this DS defines a region of operating conditions that provide prediction of assurance of quality rather than only quality as obtained with traditional mean response surface optimisation strategies. For instance, in the liquid chromatography there is a great difference in e.g. predicting a resolution (RS) higher than 1.5 vs. predicting that the probability for RS to be higher than 1.5 (i.e. P(RS> 1.5)) is high. The presentation of this global methodology will be illustrated for the robust optimisation and DS definition of several liquid chromatographic methods dedicated to the separation of different mixtures: pharmaceutical formulations, API and impurities/degradation products, plant extracts, separation of enantiomers, … References [1] International Conference on Harmonisation (ICH) of Technical Requirements for Registration of Pharmaceuticals for Human Use, Topic Q8(R2): Pharmaceutical development, Geneva, 2009. [less ▲]

Detailed reference viewed: 185 (9 ULiège)
Full Text
Peer Reviewed
See detailQUALITY BY DESIGN COMPLIANT METHOD VALIDATION
Rozet, Eric ULiege; Boulanger, B.; Hubert, Philippe ULiege

Poster (2012, February)

Analytical method validation is a mandatory step to evaluate the ability of developed methods to provide accurate results for their routine application in order to trust the critical decisions that will ... [more ▼]

Analytical method validation is a mandatory step to evaluate the ability of developed methods to provide accurate results for their routine application in order to trust the critical decisions that will be made with them. Even if several guidelines exist to help perform analytical method validations (ICH Q2R1 [1], USP <1225> [2], …) there is still the need to clarify the meaning and interpretation of analytical method validation criteria and methodology. Indeed, actually method validation is mostly realised as the traditional check list implementation of e.g. the ICH Q2R1 or USP <1225> method validation requirements. However, within the trend of Quality by Design [3], there is the need to switch from this traditional vision to an analytical method validation really adding value and providing a high level of assurance of analytical methods results reliability. Yet, different interpretations can be made of the validation guidelines as well as for the definitions of the validation criteria. This will lead to diverse experimental designs implemented to try fulfilling these criteria. Finally, different decision methodologies can also be interpreted from these guidelines. Therefore, the risk that a validated analytical method may be unfit for its future purpose will depend on a personal interpretation of these guidelines. The objective of this presentation is thus to show that analytical method validation should be planned and performed by first starting with the end in mind: what is the objective of the analytical methods under study? In such a way analytical method validation is coherent with the actual Quality by Design regulatory expectations. The risk of having validated an analytical method unfit for its purpose is strongly reduced as well as the risk of generating Out of Specification (OOS) results due to an unfit method. References [1] International Conference on Harmonisation (ICH) of Technical Requirements for registration of Pharmaceuticals for Human Use, Topic Q2 (R1): Validation of Analytical Procedures: Text and Methodology, Geneva, 2005. [2] USP 33 NF 28 S1, U.S. Pharmacopeia, 2007. USP–NF General Chapter <1225>. [3] International Conference on Harmonisation (ICH) of Technical Requirements for Registration of Pharmaceuticals for Human Use, Topic Q8(R2): Pharmaceutical development, Geneva, 2009. [less ▲]

Detailed reference viewed: 158 (10 ULiège)
Full Text
See detailInvestigations sur les protéines placentaires extraites des cotylédons fœtaux du Cervus elaphus
Fondja, E.; Okuyama, M.; Petrova, A. et al

Poster (2012, February)

Detailed reference viewed: 20 (2 ULiège)
Peer Reviewed
See detailDoes pupil constriction under blue and green monochromatic light exposure change with age?
Daneault, V; Vandewalle, Gilles ULiege; Hébert, M et al

Poster (2012, February)

Detailed reference viewed: 22 (0 ULiège)
Peer Reviewed
See detailLower impact of blue light on non-visual brain functions in older subjects
Daneault, V; Vandewalle, Gilles ULiege; Hébert, M et al

Poster (2012, February)

Detailed reference viewed: 13 (3 ULiège)
Full Text
Peer Reviewed
See detailRepeated cycles of DSS inducing a chronically relapsing inflammation: A novel model to study fibrosis using in vivo MRI T2 relaxometry
Breynaert, C; Dresselaers, T; Cremer, J et al

Poster (2012, February)

Detailed reference viewed: 24 (2 ULiège)
Full Text
Peer Reviewed
See detailLe dosage des acides gras érythrocytaires : comparaison entre une population de référence et des sujets ayant présenté un infarctus aigu du myocarde
LE GOFF, Caroline ULiege; Leroy, Ludovic; Kaux, Jean-François ULiege et al

Poster (2012, February)

Introduction Un acide gras (AG) est un acide carboxylique avec une longue chaine aliphatique, qui peut être saturé ou insaturé. Récemment, le rôle des AG, particulièrement, celui des oméga-3 et oméga-6, a ... [more ▼]

Introduction Un acide gras (AG) est un acide carboxylique avec une longue chaine aliphatique, qui peut être saturé ou insaturé. Récemment, le rôle des AG, particulièrement, celui des oméga-3 et oméga-6, a émergé comme facteur de risque cardiovasculaire dans la littérature. Le but de ce travail était de comparer les taux d’AG mesurés dans une population saine avec ceux obtenus chez des patients admis aux urgences pour un infarctus du myocarde. Matériels et méthodes Cinquante quatre sujets sains (33±11ans, 31 femmes) ont été sélectionnés comme population de référence. Ces derniers ont été sélectionnés selon leur mode de vie (alimentation, tabac, etc). En parallèle, nous avons dosé les AG chez 33 patients (55±9 ans, 12 femmes) admis dans le service d’urgence de notre institution pour infarctus aigu du myocarde (AMI). Le sang était prélevé sur EDTA. Avant l’analyse, les échantillons étaient lavés et transméthylés. Le dosage des AG était réalisé par chromatographie gazeuse couplée à un détecteur à ionisation de flamme (GCFID). Après le dosage, nous avons réalisés une comparaison des taux, sommes et rapport entre les différents AG ainsi que l’index oméga-3 (somme de l’acide eicosapentaénoïque et docosahexaénoïque) obtenus dans les 2 groupes. Résultats. Des valeurs de référence ont été obtenues pour notre population de référence via le logiciel de statistique MedCalc. Dans le groupe AMI, les taux d’oméga-6 étaient significativement plus élevés (p<0.05) pour C18:2n6 (Figure 1) et C18:3n6 (Figure 2)comparés aux résultats obtenus dans la population de référence. Par contre les taux d’oméga-3 étaient significativement plus bas (p<0.01) par rapport aux sujets de référence pour le C22 :6n3 (Figure 3). L’index oméga-3 montrait une valeur plus basse et le rapport oméga-6/oméga-3 était plus élevé dans le groupe AMI comparé aux sujets de référence. Conclusion Le dosage des AG est un nouvel outil que le laboratoire peut proposer aux cliniciens afin de stratifier les patients présentant le plus de risque cardiovasculaire avant ou après un infarctus du myocarde. Ces patients pourraient ainsi être supplémenté en acides gras oméga-3 afin d’éviter les récidives d’infarctus du myocarde ou de diminuer la formation de la plaque d’athérosclérose avant le premier accident. [less ▲]

Detailed reference viewed: 687 (28 ULiège)
Full Text
See detailPOST-COMBUSTION CO2 CAPTURE: Global Process Simulation and Solvent Degradation
Léonard, Grégoire ULiege; Lepaumier, Hélène; Blandina, Fabrice et al

Poster (2012, February)

One of the biggest upcoming challenges concerning both environmental and energy systems engineering is the control and limitation of greenhouse gas emissions due to human activity. Fossil fuels-fired ... [more ▼]

One of the biggest upcoming challenges concerning both environmental and energy systems engineering is the control and limitation of greenhouse gas emissions due to human activity. Fossil fuels-fired power plants are in this context one of the main contributors due to the large amounts of CO2 emitted. Different technologies have been developed for capturing CO2 from such power plants. This work focuses on post-combustion CO2 capture by reactive absorption into amine solvents like monoethanolamine (MEA). The main drawback of this technology is actually the high energy requirement of the process, especially for solvent regeneration. It is then highly interesting to model the capture process so that optimal operating conditions could be approached by simulation thus reducing the number of expensive experimental tests. Thanks to the simulation, it has been possible to identify the most influent process variables and to optimize their value. It was also possible to study the impact of process modifications on the global capture efficiency. The improvements studied allowed for a reduction by up to 14% of the process exergy consumption. Another major drawback of the post-combustion CO2 capture is solvent degradation, which can be due to thermal as well as oxidative mechanisms. Degradation affects the CO2 capture process since it may cause corrosion, foaming and fouling, possibly inducing a decrease of the solvent efficiency and high additional operating costs due to solvent replacement. In order to study degradation of conventional amine solvents as well as degradation of novel solvents, a degradation test rig has been built at the University of Liège in collaboration with the company Laborelec, member of the GDF SUEZ group. First results show that degradation obtained on this lab installation can be compared to degradation results observed on CO2 capture pilot installation. The final objective of this thesis is to make a link between degradation and simulation. Experimental data obtained on the degradation test rig will be implemented into the existing simulation model so that optimal operating conditions considering both process energy efficiency and solvent degradation can be determined. [less ▲]

Detailed reference viewed: 111 (8 ULiège)
Peer Reviewed
See detailA single synthetic small molecule that generates force against a load
Lussis, Perrine ULiege; Svaldo-Lanero, Tiziana; Bertocco, Andrea et al

Poster (2012, February)

Biological molecular machines are able to rectify random thermal motions to generate directional force and carry out tasks on both the molecular and macroscopic length scales1. Although some artificial ... [more ▼]

Biological molecular machines are able to rectify random thermal motions to generate directional force and carry out tasks on both the molecular and macroscopic length scales1. Although some artificial nanomachines have been synthesized2 and used to collectively carry out mechanical tasks3, so far there have been no direct measurements of mechanical processes at the single-molecule level. Here we report measurements of the mechanical work performed by a synthetic molecule less than 5 nm long. We show that biased Brownian motion of the sub-molecular components in a hydrogen bonded [2]rotaxane4 -a molecular ring threaded onto a molecular axle- can be harnessed to generate significant directional forces. We used the cantilever of an atomic force microscope to apply a mechanical load to the ring during single-molecule pulling–relaxing cycle. The ring was pulled along the axle, away from the thermodynamically favoured binding site, and was then found to travel back to this site against an external load of 30 pN5. Using fluctuation theorems6, we were able to relate the measurements of the work done at the level of individual molecules to the free energy change measured previously by ensemble measurements. The results show that individual rotaxane molecules can generate directional forces of similar magnitude to those generated by natural biological machines, and extend the capabilities of AFM-based single molecule mechanics to the world of small molecules. It opens up the possibility of testing modern theories of non-equilibrium statistical mechanics, such as Jarzynski’s equality7 and the Crooks fluctuation theorem6, in single-molecule AFM measurements. 1. Schilva, M. (ed.) Molecular Motors (Wiley-VCH, Weinheim, 2003). 2. Kay, E. R., Liegh, D. A. & Zerbetto, F., Angew. Chem. Int. Ed. 46, 72-191 (2007). 3. Berna, J., Leigh, D. A., Lubomska, M., Mendoza, S. M., Pérez, E. M., Rudolf, P., Teobaldi, G. & Zerbetto, F., Nature Mater. 4, 704-710 (2005). 4. Kay, E. R. & Liegh, D. A., Top. Curr. Chem. 262, 133-177 (2005). 5. Lussis, P., Svaldo-Lanero T., Bertocco, A., Fustin C-A., Leigh, D. A., Duwez A-S., Nature Nanotech. 6, 553-557 (2011). 6. Crooks, G.E., Phys.Rev.E, 60, 2771-2726 (1999) 7. Jarzynski, C., Phys.Rev.Lett., 78, 2690-2693 (1997) [less ▲]

Detailed reference viewed: 13 (1 ULiège)
Full Text
Peer Reviewed
See detailThe Emotional Side of Paternalism: Do People Share What They Feel?
Silvestre, Aude ULiege; Dardenne, Benoît ULiege

Poster (2012, January 28)

We were interested in the kind of emotions felt and socially shared after experiencing paternalism (when A acts toward B with a fatherlike attitude) or blatant hostility. Participants had to read either a ... [more ▼]

We were interested in the kind of emotions felt and socially shared after experiencing paternalism (when A acts toward B with a fatherlike attitude) or blatant hostility. Participants had to read either a paternalist, hostile or factual version of the welcome speech of their new boss. They then were asked to write a text about how this day was going (social sharing measure). The results revealed that being the target of paternalism or hostility is an emotional episode which leads to social sharing of emotion. Hostility is a clearly negative episode, leading to negative social sharing. Paternalism is more ambiguous. Participants felt positive emotions (except for distrust) but they shared both positive and negative ones. Paternalism can be perceived as positive but seems to lead to negative outcomes. Our further step would be to test its negative effects on performance (reading span test). [less ▲]

Detailed reference viewed: 107 (12 ULiège)
Full Text
See detailMachine learning techniques for atmospheric pollutant monitoring
Sainlez, Matthieu ULiege; Heyen, Georges ULiege

Poster (2012, January 27)

Machine learning techniques are compared to predict nitrogen oxide (NOx) pollutant emission from the recovery boiler of a Kraft pulp mill. Starting from a large database of raw process data related to a ... [more ▼]

Machine learning techniques are compared to predict nitrogen oxide (NOx) pollutant emission from the recovery boiler of a Kraft pulp mill. Starting from a large database of raw process data related to a Kraft recovery boiler, we consider a regression problem in which we are trying to predict the value of a continuous variable. Generalization is done on the worst case configuration possible to make sure the model is adequate: the training period concerns stationary operations while test periods mainly focus on NOx emissions during transient operations. [less ▲]

Detailed reference viewed: 33 (8 ULiège)
Full Text
See detail5-ALA-PDT induces RIP3-dependent necrosis in glioblastoma
Coupienne, Isabelle ULiege; Fettweis, Grégory ULiege; Piette, Jacques ULiege

Poster (2012, January 27)

Detailed reference viewed: 20 (4 ULiège)
Full Text
See detailExtent of paleofires and past human settlements in the current rainforest patchwork of the Northern Republic of Congo
Gillet, Jean-François ULiege; Doucet, Jean-Louis ULiege

Poster (2012, January 04)

Objectives The origins of the patchwork of lowland semi-deciduous forests in the Northern Republic of Congo were apprehended. The aim of this study was to show that dense forests suffered fewer ... [more ▼]

Objectives The origins of the patchwork of lowland semi-deciduous forests in the Northern Republic of Congo were apprehended. The aim of this study was to show that dense forests suffered fewer disturbances than the open canopy forest types. Old disturbances associated with fires and human settlements seem to have had and still have today a substantial impact on the physiognomy and the composition of the forest types. Understanding past forest dynamics is a major component to predict the effects of both present climate change and human activities. Method Fifteen locations were studied along a 400-km-long SW-NE gradient in the NW of the Congo Basin through the ERA-net BiodivERsA CoForChange project. An anthraco-archaeological study was carried out in association with floristic inventories of three strata. Two main geology substrates were considered: the Mesozoic sandstones and Quaternary alluvial deposits. The abundance of charcoal fragments and human artifacts were evaluated by a network of 1-m-deep boring augers (n =208) and a 1.5-m-deep reference soil pit (n =15) in each site. A rating system was used to quantify the abundance of charcoal, charred Elaeis guineensis seeds and other artifacts (ceramic and metallurgic slag). Estimations were based on 20-cm-depth intervals (augers) or on pedological layers (pits). Twelve radiocarbon dating were performed in the major disturbed layers of each vegetation type studied. Results Two main groups of vegetation were highlighted according to the relative openness of the woody stand, the importance of the woody regeneration, and the development of the herbaceous cover. The two dense forests sampled were preferentially found in the northern part: the dense forest with Manilkara mabokeensis and Haumania dankelmaniana, and the Gilbertiodendron dewevrei forest on dry land. Most parts of the understorey exhibited the woody regeneration. The southern part presented more openness including the largest areas of open canopy vegetation types. Three forest types were identified: the Macaranga barteri pioneer forest, the open canopy vegetation type with Aframomum and Marantaceae, and the sparse forest with Megaphrinium macrostchyum and/or Haumania liebrestisiana. The understorey was a dense thicket of giant herbs belonging to the families Marantaceae and Zingiberaceae, causing a very scarce woody regeneration. Regardless the auger depth, charcoals were more profuse in the soils of the southern open canopy vegetation types (2-Way ANOVA, F=5.46, p=0.02). As in pit layers, charred oil palm nuts were more plentiful in the soils of these vegetation types (Mann-Whitney test, p<0.05). Of the five sites containing artifacts, only one recent potsherd dated 466-302 BP was located in dense forest but near a main river. The oldest signs of ceramic and metallurgical activities dated 2160-1407 BP were found in the current open canopy vegetation types. Within the latter, two expansion phases of the oil palm tree E. guineensis were observed: between 2146-1055 BP and 558-347 BP. Conversely, the oldest palaeofire was discovered in the M. mabokeensis dense forest and dated at 5467-5285 BP. Conclusions The dense forests contained less evidence of ancient fires and human settlements. They currently include evergreen and shade-tolerant tree species such as G. dewevrei and M. mabokeensis. The more sustained and repeated fires in the open canopy vegetation types were often associated with ancient human occupation. Today, the light-demanding giant herbaceous species such as Aframomum sp. and M. macrostchyum proliferate in the understorey below a simplified woody component of pioneer species such as M. barteri. The largest expansion phases of the oil palm tree E. guineensis in the southern part would be linked to ancient human occupation associated with larger canopy openings and fire events. The water availability, more evenly distributed near the heavily-irrigated Congo Basin, would also be a discriminating factor. [less ▲]

Detailed reference viewed: 66 (8 ULiège)
Peer Reviewed
See detailAtomic data for lowly ionized Fe-peak species
Bautista, M.A.; Fivet, V.; Ballance, C. et al

Poster (2012, January)

Detailed reference viewed: 5 (1 ULiège)
Full Text
See detailEngineering and characterisation of chimeric CXCR4 and CXCR7 chemokine receptors
Szpakowska, Martyna ULiege; Fievez, Virginie; Counson, Manuel et al

Poster (2012, January)

Detailed reference viewed: 37 (1 ULiège)
See detailPersonality modulation of (un)conscious processing: Novelty seeking and performance following supraliminal and subliminal reward cues
Bustin, Gaëlle ULiege; Quoidbach, Jordi; Hansenne, Michel ULiege et al

Poster (2012, January)

This study provides evidence that personality traits associated with responsiveness to conscious reward cues also influence responsiveness to unconscious reward cues. Participants with low and high levels ... [more ▼]

This study provides evidence that personality traits associated with responsiveness to conscious reward cues also influence responsiveness to unconscious reward cues. Participants with low and high levels of Novelty Seeking (NS) performed updating tasks in which they could either gain 1 euro or 5 cents. Gains were presented either supraliminally or subliminally at the beginning of each trial. Results showed that low NS participants performed better in the high-reward than in the low-reward condition, whereas high NS participants’ performance did not differ between reward conditions. Interestingly, we found that low NS participants performed significantly better when rewards were presented unconsciously, whereas high NS participants’ performance did not differ whether reward cues were presented subliminally or supraliminally. Our findings highlight the necessity to take personality into account in unconscious cognition research. They also suggest that whether implicit and explicit motives have similar or complementary influences might be determined by individual differences. [less ▲]

Detailed reference viewed: 79 (14 ULiège)
Peer Reviewed
See detailMiR-146a an angiostatic miRNA elevated in peripartum cardiomyopathy
Halkein, Julie ULiege; Tabruyn, Sébastien ULiege; Haghikia, Arash et al

Poster (2012, January)

Detailed reference viewed: 47 (2 ULiège)
Full Text
See detailMultilocus-based phylogeny and species recognition within the cosmopolitan Peltigera neopolydactyla-dolichorhiza complex
Magain, Nicolas ULiege; Miadlikowska, Jolanta; Lutzoni, François et al

Poster (2012, January)

The Peltigera neopolydactyla/dolichorhiza complex is broadly distributed, growing in boreal and temperate regions from northern Norway to southern Chile, as well as in tropical mountains. Observed ... [more ▼]

The Peltigera neopolydactyla/dolichorhiza complex is broadly distributed, growing in boreal and temperate regions from northern Norway to southern Chile, as well as in tropical mountains. Observed morphotype and chemotype variation within this complex suggested the presence of multiple undescribed species. We inferred the phylogeny of Peltigera section Polydactylon with a special focus on the Peltigera neopolydactyla/dolichorhiza complex to determine the full breadth of this species complex, and to assess if taxa from different parts of the worlds but with similar morphological features share a most recent common ancestor. About 525 ITS sequences representing 104 distinct haplotypes were generated for representatives of Peltigera section Polydactylon. We selected a representative of each broadly defined phylotype for which three protein-coding loci: RPB1.1, b-tubulin and EFT2.1 were sequenced. Each of the three protein coding loci provided equivalent or more resolution and support than the ITS locus. The greatest proportion of significantly supported nodes across the tree resulted from β-tubulin alone. Many specimens identified as P. neopolydactyla and P. dolichorhiza are placed outside of this species complex. As currently defined both species represent polyphyletic assemblages of taxa including several potentially undescribed species. Our phylogenies suggest the presence of putatively new species within several complexes across the section. [less ▲]

Detailed reference viewed: 125 (13 ULiège)
See detailTargeting selective aggresome autophagy enhances Bortezomib- induced cell
Rapino, Francesca ULiege

Poster (2012, January)

Detailed reference viewed: 1 (0 ULiège)
Full Text
See detailThe tomato leafminer reproduces without a mate: New case of parthenogenesis in Lepidoptera
Caparros Megido, Rudy ULiege; Haubruge, Eric ULiege; Verheggen, François ULiege

Poster (2012)

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

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

Detailed reference viewed: 83 (12 ULiège)
Full Text
See detailHybrid Lens for Solar Concentration: Optimization of the Multilayer Diffractive Lens
Languy, Fabian ULiege; Habraken, Serge ULiege

Poster (2012)

Manufacture process degrades the ideal shape of multilayer diffractive lens due to draft angle, half radius tool and slope error. We show some shape improvements using an extended scalar theory.

Detailed reference viewed: 78 (16 ULiège)
Full Text
Peer Reviewed
See detailAdhésion thérapeutique du patient hémodialysé
DELANAYE, Pierre ULiege; CAVALIER, Etienne ULiege; DUBOIS, Bernard ULiege et al

Poster (2012)

Detailed reference viewed: 27 (3 ULiège)
Peer Reviewed
See detailBacillus lipopeptides: Potential new biopesticides against lettuce downy mildew
Deravel, J.; Coutte, F.; Van Hese, N. et al

Poster (2012)

Detailed reference viewed: 39 (2 ULiège)
Peer Reviewed
See detailNeural correlates of hypokinetic gait in Parkinson’s disease: An fMRI study
Cremers, Julien ULiege; Stamatakis, Julien; D'Ostilio, Kevin ULiege et al

Poster (2012)

Objective: To investigate the neural correlates of hypokinetic gait in Parkinson’s disease (PD) using functional magnetic resonance imaging (fMRI). Background: Although hypokinetic gait is frequent and ... [more ▼]

Objective: To investigate the neural correlates of hypokinetic gait in Parkinson’s disease (PD) using functional magnetic resonance imaging (fMRI). Background: Although hypokinetic gait is frequent and has a negative impact on quality of life in PD, its underlying mechanisms remain poorly understood. Assuming that the brain regions recruited during real and imagined gait strongly overlap, mental imagery of brisk gait may be a successful approach to study hypokinetic gait in PD. Methods: Fifteen ‘‘on-drugs’’ PD patients (8 males; mean age 5 65.1 6 9.4 years) and fifteen controls matched for age, gender and mental imagery skills were trained to perform video-taped trials of comfortable and brisk gait on a 25 meter-path. The study was organ- ized as a block-design fMRI experiment where subjects were instructed to rehearse themselves performing comfortable and brisk gait and to press a key to indicate when they completed each 25 meter-imagined gait trial. The imagined speed reserve (ISR) defined as the difference between imagined brisk and comfortable gait speeds was measured as a control of behavioral performance. Imaging data processing and analyses were performed using SPM8. The first-level individual contrast images representing the comparison between brisk and comfortable gait were entered as two separate groups (controls vs patients) in an ANOVA with the corresponding ISRs as correlation regressors. Results: Compared with controls, patients showed hypokinetic gait during real gait training as their increase in speed during brisk relatively to comfortable gait was related to an increase in step ca- dence (r50.87; p<0.001) but not in step length (r50.11). ISRs meas- ured during fMRI and their real counterparts measured offline strongly correlated in patients (r50.88; p<0.001) and controls (r50.59; p50.02). Between-group comparison (p<0.001, uncorrected) of fMRI data showed that increasing imagined gait speed was strongly associated with increased activity of the left posterior parietal cortex in controls and with decreased activity of this region in patients. Conclusions: Our findings suggest that hypokinetic gait in PD is related to the impaired functioning of the left posterior parietal cortex. This area may represent a target for therapeutic interventions aimed at alleviating gait disturbances in PD. [less ▲]

Detailed reference viewed: 215 (4 ULiège)
See detailDynamique paysagère au Nord-Bénin (Afrique de l'Ouest)
Mama, A; Sinsin, B; Bogaert, Jan ULiege et al

Poster (2012)

Detailed reference viewed: 47 (2 ULiège)
See detailLes femmes chefs d’entreprises : Quels sont les facteurs qui influencent l’entrepreneuriat ?
Salman, Noura ULiege; El Abboubi, Manal ULiege; Henda-Guerfelf, Sana

Poster (2012)

Le présent article vise à dresser un état de l’art de l’entrepreneuriat au Maroc à partir d’une approche par le genre. Plusieurs variables contextuelles et socio-économiques interviennent dans la ... [more ▼]

Le présent article vise à dresser un état de l’art de l’entrepreneuriat au Maroc à partir d’une approche par le genre. Plusieurs variables contextuelles et socio-économiques interviennent dans la compréhension des incitants et des mécanismes de ce phénomène au Maroc et nous souhaitons les mettre en évidence dans cet article. Pour cela, nous questionnons les modalités d’entreprendre par les femmes marocaines et les variables contextuelles, religieuses, socio-économiques qui interviennent dans leurs choix d’investissement entrepreneuriaux… Pour cela nous élaborons une revue de la littérature et nous tenterons d’élaborer un modèle intégrateur des variables explicatives de l’entrepreneuriat féminin au Maroc. [less ▲]

Detailed reference viewed: 60 (3 ULiège)
Full Text
See detailOrganisation d’une association villageoise adaptée à la foresterie communautaire au Gabon
Meunier, Q.; Angwé, A.; Boldrini, S. et al

Poster (2012)

Detailed reference viewed: 85 (4 ULiège)
Full Text
See detailEnzymatic process development for the extraction of ferulic acid from wheat bran
Giet, Jean-Michel ULiege; Blecker, Christophe ULiege

Poster (2012)

The agro-industries generate each year thousands of tons of by-products, such as cereal bran or sugar beet pulps. For instance, Walloon wheat transformation industry provides annually about 200.000 tons ... [more ▼]

The agro-industries generate each year thousands of tons of by-products, such as cereal bran or sugar beet pulps. For instance, Walloon wheat transformation industry provides annually about 200.000 tons of bran. Most of those by-products are under-valorized as cattle feed. By the use of biorefinery, this biomass may constitute a renewable source for various value-added molecules like dietary fibres, proteins, antioxidants, and more. [less ▲]

Detailed reference viewed: 71 (4 ULiège)
Full Text
See detailEmpreintes de femmes sur les routes de l'Europe : l'architecture des couvents des annonciades célestes
Piront, Julie ULiege

Poster (2012)

Poster présentant les principaux objectifs, les sources et les résultats obtenus de la thèse de doctorat intitulée "Empreintes architecturales de femmes sur les routes de l'Europe : étude des couvents des ... [more ▼]

Poster présentant les principaux objectifs, les sources et les résultats obtenus de la thèse de doctorat intitulée "Empreintes architecturales de femmes sur les routes de l'Europe : étude des couvents des annonciades célestes fondés avant 1800", soutenue le 9 décembre 2013. [less ▲]

Detailed reference viewed: 12 (0 ULiège)
Full Text
See detailSolutal Marangoni instability of binary mixtures evaporating into air: an analytical model describing highly unstable cases
Machrafi, Hatim ULiege; Rednikov, Alexey; Colinet, Pierre et al

Poster (2012)

Detailed reference viewed: 9 (0 ULiège)
Full Text
See detailIMPACT OF HEAVY METALS ON PHYSIOLOGICAL AND PROTEOMIC RESPONSES OF WILLOWS (SALIX SP.)
Evlard, Aricia ULiege; Sergeant, Kjell; Ferrandis, Salvador et al

Poster (2012)

In 2010, around 3,800 sites in Wallonia (Belgium) were identified as potentially contaminated by heavy metals, a result of their past industrial and agricultural activities [1]. The technique of using ... [more ▼]

In 2010, around 3,800 sites in Wallonia (Belgium) were identified as potentially contaminated by heavy metals, a result of their past industrial and agricultural activities [1]. The technique of using plants to remediate contaminated sites (phytoremediation) has been studied for over twenty years. In particular, the use of trees (alder, willow, poplar) has been considered because of their large biomass production [2] [3] [4] [5]. The aim of this study was to identify the potential of local willow ecotypes to grow in the presence of heavy metals using lysimeters filled with dredging sludge. Several willow ecotypes were compared realizing morphological and physiological measurements (chlorophyll fluorescence, electrolyte leakage, carbohydrate content). The plant responses to metal stress were also investigated using a proteomic approach. Heavy metals contents in leaves and stems were analysed. With this study, the potential of these trees to valorise contaminated, abandoned sites in Belgium was evaluated. [1] Cellule Etat de l'environnement wallon (2010). Tableau de bord de l'environnement wallon. SPW-DGARNE-DEMNA-DEE. [2] Dickinson N. M. (2000). Strategies for sustainable woodland on contaminated soils. Chemosphere 41(1-2): 259-263. [3] Meers E., Lamsal S., Vervaeke P., Hopgood M., Lust N. and Tack F. M. G. (2005). Availability of heavy metals for uptake by Salix viminalis on a moderately contaminated dredged sediment disposal site. Environ Pollut 137(2): 354-364. [4] Meers E., Vandecasteele B., Ruttens A., Vangronsveld J. and Tack F. M. G. (2007). Potential of five willow species (Salix spp.) for phytoextraction of heavy metals. Environ Exp Bot 60(1): 57-68. [5] Rosselli W., Keller C. and Boschi K. (2003). Phytoextraction capacity of trees growing on a metal contaminated soil. Plant Soil 256(2): 265-272. [less ▲]

Detailed reference viewed: 89 (8 ULiège)
See detailDynamique des paysages forestiers et savanicoles du Sud et du Nord-Est du Burundi
Havyarimana, F; Bigendako, M J; Bogaert, Jan ULiege et al

Poster (2012)

Detailed reference viewed: 32 (6 ULiège)
Full Text
See detailEarly detection of alien plants in xeric Natura 2000 sites in Southern Belgium
Monty, Arnaud ULiege; Frisson, Gwenn; Mahy, Grégory ULiege

Poster (2012)

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

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

Detailed reference viewed: 36 (3 ULiège)
Full Text
Peer Reviewed
See detailTypage des souches de Norovirus circulant dans les populations symptomatiques et asymptomatiques au Burkina Faso
HUYNEN, Pascale ULiege; Mauroy, Axel ULiege; MARTIN, Caroline et al

Poster (2012)

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

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

Detailed reference viewed: 67 (5 ULiège)
Peer Reviewed
See detailIndicateurs de qualité de prise en charge du cancer du corps de l’utérus : méthodologie et liste pour le projet EFFECT
Bouche, G; WERBROUCK, J; De Jonge, E et al

Poster (2012)

Detailed reference viewed: 7 (0 ULiège)
Full Text
Peer Reviewed
See detailImmature Metaplastic CIN1: A Variant with Intense P16 Staining and Low Proliferative Index
Parra-Herran, Christopher P.; Lane, Bruno; Hirsch, MS et al

Poster (2012)

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

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

Detailed reference viewed: 67 (0 ULiège)
See detailEtude des feux d'aménagement en zone tropicale semi-aride: cas du Parc Régional du W du Niger
Diouf, A; Barbier, N; Saadou, M et al

Poster (2012)

Detailed reference viewed: 24 (4 ULiège)
See detailAnthropisation et effets de lisière: impacts sur la diversité des rongeurs dans la réserve forestière de Masako (Kisangani, RDC)
Iyongo, L; Visser, M; Verheyen, E et al

Poster (2012)

Detailed reference viewed: 32 (1 ULiège)
See detailImpact of sequencing design on missing marker imputation and genomic selection in cattle
Druet, Tom ULiege; MacLeod, Iona; Hayes, Ben

Poster (2012)

Detailed reference viewed: 16 (0 ULiège)
Full Text
Peer Reviewed
See detailSurface and bio-adhesion properties of new hydrophobic and current materials for artificial intraocular lens
Bertrand, Virginie ULiege; Svaldo Lanero, Tiziana ULiege; Duwez, Anne-Sophie ULiege et al

Poster (2012)

A high bio-adhesion appears to be one of the key factor for posterior capsular opacification (PCO) prevention. Indeed, the proteins adsorption and the lens epithelial cells (LEC) adhesion both contribute ... [more ▼]

A high bio-adhesion appears to be one of the key factor for posterior capsular opacification (PCO) prevention. Indeed, the proteins adsorption and the lens epithelial cells (LEC) adhesion both contribute to PCO development. We present in this work the comparison of a new glistening free hydrophobic material (GF® from Physiol) with benchmark hydrophobic and hydrophilic materials regarding their chemicophysical properties and their respective ability to interact with lens epithelial cells and proteins. For this purpose, we determined the hydrophobicity by contact angle measurement (assessed by water drop and air bubble methods), the surface adhesiveness by atomic force microscopy (AFM), the proteins adsorption by fluorescent measurement and the LEC adhesion by the determination of cell density. The new hydrophobic material presents comparable hydrophobicity, proteins adsorption and LEC adhesion to current commercial hydrophobic material. Its adhesiveness, measured with the AFM, is intermediate between hydrophilic and hydrophobic materials. In conclusion, the bio-adhesion properties of this new glistening free hydrophobic IOL material are similar to generic hydrophobic acrylic materials and therefore should to the same extent prevent PCO. [less ▲]

Detailed reference viewed: 72 (5 ULiège)
Full Text
See detailImplication of HDAC-5 in heterochromatin replication
Peixoto, P; Castronovo, V; Matheus, N et al

Poster (2012)

Detailed reference viewed: 23 (5 ULiège)
Peer Reviewed
See detailCellulase involvement in the bacterial cellulose biosynthesis
Delsaute, Maud ULiege; Berlemont, Renaud ULiege; Bauvois, Cédric et al

Poster (2012)

Detailed reference viewed: 49 (11 ULiège)
Peer Reviewed
See detailRégénération des communautés de campos rupestres, pelouses tropicales d’altitude, après un feu (Brésil)
Hernandez, Pauline; Le Stradic, Soizig ULiege; Buisson, Elise et al

Poster (2012)

Detailed reference viewed: 13 (0 ULiège)
Peer Reviewed
See detailLa pêche aux nasses dans le delta du fleuve Ouémé, Bénin : implications pour une gestion rationnelle des ressources halieutiques
Montchowui, Elie; Agadjihouede, Hyppolite; Poncin, Pascal ULiege et al

Poster (2012)

Detailed reference viewed: 32 (0 ULiège)
Full Text
See detailMorphological study of the Boettcher cells during the development of the rat cochlea
Cloes, Marie ULiege; Renson, T; Thelen, Nicolas ULiege et al

Poster (2012)

Detailed reference viewed: 23 (8 ULiège)
Full Text
See detailHygrothermal modelling of Lime-Hemp concrete used as building material and indoor climate buffering characterization
Dubois, Samuel ULiege; Evrard, Arnaud; Lebeau, Frédéric ULiege

Poster (2012)

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

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

Detailed reference viewed: 386 (66 ULiège)
Full Text
See detailOncogenic human papillomavirus could directly interact with natural killer cells
Renoux, V; Bastin, R; Langers, I et al

Poster (2012)

Detailed reference viewed: 20 (0 ULiège)
Full Text
See detailHDAC5 depletion modulates heterochromatin plasticity and triggers programmed cell death of human cancer cells
Peixoto, P; Castronovo, V; Matheus, N et al

Poster (2012)

Detailed reference viewed: 41 (6 ULiège)
Full Text
See detailAntibubble: role of the nature of the surfactant
Dorbolo, Stéphane ULiege; Vandewalle, Nicolas ULiege

Poster (2012)

Detailed reference viewed: 63 (15 ULiège)
See detailKINETICS OF QUINALPHOS RESIDUES ELIMINATION IN WATER AND FISH TISSUES FROM TANK CULTURED SILVER BARB (Barbonymus gonionotus)
Nguyen Quoc, Thinh; Tran Minh, Phu; Do Thi Thanh, Huong et al

Poster (2012)

Detailed reference viewed: 42 (3 ULiège)
See detailAnalyse sensorielle et biochimique du Tilapia du Nil (Oreochromis niloticus) conservé à température ambiante (30°C) et à 4°C
Boudjlal Dergal, Nadir; Ali-Mehidi, Smaïl; Douny, Caroline ULiege et al

Poster (2012)

Detailed reference viewed: 61 (9 ULiège)
Full Text
Peer Reviewed
See detailDémo SDC - Studio Distant Collaboratif
Ben Rajeb, Samia ULiege; Leclercq, Pierre ULiege

Poster (2012)

Detailed reference viewed: 36 (2 ULiège)
Full Text
Peer Reviewed
See detailPrevalence of naturally occuring cartilage defects in the ovine stifle
Pierson, Audrey ULiege; Muylkens, Benoît ULiege; Hontoir, Fanny et al

Poster (2012)

Detailed reference viewed: 39 (11 ULiège)
Full Text
See detailEffet de l'érythromycine sur le traitement par boues activées
Louvet, Jean-Noël ULiege; Giammarino, Cinzia; Dumas, Dominique et al

Poster (2012)

Detailed reference viewed: 10 (0 ULiège)
Full Text
Peer Reviewed
See detailElectrical Characterization of p-Ge1-xSnx/p-Ge and p-Ge1-xSnx/n-Ge Heterostructures by Numerical Simulation of Admittance Spectroscopy
Baert, Bruno ULiege; Truong, Dao Y Nhi; Nakatsuka, Osamu et al

Poster (2012)

Detailed reference viewed: 79 (26 ULiège)
Full Text
See detailWhetstones in Gaul: Building a typology
Thiebaux, Aurélie ULiege; Goemaere, Eric; Deru, Xavier ULiege et al

Poster (2012)

Detailed reference viewed: 73 (6 ULiège)
Peer Reviewed
See detailRééducation attentionnelle chez l’enfant avec Trouble Déficitaire de l’Attention (TDA) : Analyse de deux cas.
Turine, Hélène ULiege; Lejeune, Caroline ULiege; Catale, Corinne ULiege

Poster (2012)

L’objectif de cette étude est d’évaluer l’efficacité d’une prise en charge cognitive basée sur des exercices spécifiques d’entraînement de l’attention (informatisés et papier-crayon) sur les performances ... [more ▼]

L’objectif de cette étude est d’évaluer l’efficacité d’une prise en charge cognitive basée sur des exercices spécifiques d’entraînement de l’attention (informatisés et papier-crayon) sur les performances cognitives et le comportement de deux enfants TDA. L’impact d’une prise en charge attentionnelle chez des enfants avec TDA reste, à ce jour, mal connu même si quelques rares travaux suggèrent un bénéfice de ce type d’intervention sur des mesures attentionnelles et comportementales chez ces enfants (e.g., Noël et al., 2007). Deux enfants TDA avec troubles attentionnels objectivés par un examen neuropsychologique ont bénéficié de 40 séances de rééducation, lesquelles proposaient des exercices spécifiques aux difficultés de ces deux enfants (inhibition, attention soutenue et sélective et flexibilité). Chaque enfant était apparié à quatre enfants de contrôle. Les analyses de comparaison pré et post-rééducation montrent une amélioration des performances pour le cas 1 au niveau de différents composants attentionnels (inhibition, attention soutenue, attention sélective et flexibilité) ainsi qu’au niveau comportemental (p<.05) qui se maintient au-delà de 6 mois après la rééducation. En revanche, les analyses réalisées pour le cas 2 ne montrent aucune amélioration mais plaident en faveur d’un changement de stratégie cognitive (amélioration de la performance qualitative au détriment de la vitesse de réalisation). Cette étude confirme l’intérêt d’une prise en charge attentionnelle chez des enfants avec TDA et souligne l’importance de différents paramètres (variabilité interindividuelle, âge, motivation, profil attentionnel,…) dans le succès d’une telle rééducation. [less ▲]

Detailed reference viewed: 627 (50 ULiège)
Full Text
Peer Reviewed
See detailClassification Trees based on infrared spectroscopic data to discriminate between genuine and counterfeit medicines.
Deconinck, Eric; Sacre, Pierre-Yves ULiege; Coomans, Danny et al

Poster (2012)

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

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

Detailed reference viewed: 37 (1 ULiège)
Peer Reviewed
See detailIs motor sequence learning impaired in Developmental Coordination Disorder?
Lejeune, Caroline ULiege; Catale, Corinne ULiege; Schmitz, Xavier ULiege et al

Poster (2012)

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

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

Detailed reference viewed: 174 (2 ULiège)
Full Text
Peer Reviewed
See detailBlue... is a bad sign
LORCE, Aurélie ULiege; BODSON, Lucien ULiege; Ghuysen, Alexandre ULiege et al

Poster (2012)

Detailed reference viewed: 99 (9 ULiège)
Full Text
Peer Reviewed
See detailA medieval shot
LOMBARD, Xavier ULiege; Ghuysen, Alexandre ULiege; D'Orio, Vincenzo ULiege

Poster (2012)

Detailed reference viewed: 144 (13 ULiège)
Full Text
See detailAdvanced genetic models for Piétrain boars involved in crossbreeding in the Walloon Region using test station and on-farm phenotypic and genomic data
Dufrasne, Marie ULiege; Jaspart, Véronique; Wavreille, José et al

Poster (2012)

Since 2007 the Walloon Region is acquiring a new advanced genetic evaluation program for Piétrain boars. Comprehensive models for routine genetic evaluation of boars involved in crossbreeding programs ... [more ▼]

Since 2007 the Walloon Region is acquiring a new advanced genetic evaluation program for Piétrain boars. Comprehensive models for routine genetic evaluation of boars involved in crossbreeding programs, using simultaneously data recorded on crossbred progeny at central test station and data recorded on-farm on purebred or crossbred pigs, are under development. Traits evaluated include growth, carcass quality traits and feed intake. Estimated breeding values allow breeders to select the best boars according to their selection objectives. But to have comprehensive models for crossbreeding performances, more advanced modelling of non-additive and crossbreeding effects will be added to current models. Additionally potential use of genomic information will be explored. [less ▲]

Detailed reference viewed: 31 (9 ULiège)
Full Text
See detailcapacité de localisation spatiale des enfants avec Infirmité Motrice Cérébrale (IMC)
Schmetz, Emilie ULiege; BARISNIKOV, Kovilkja

Poster (2012)

Detailed reference viewed: 115 (23 ULiège)
Full Text
See detailStable isotope composition spatial variability at microhabitat scale of macrofauna inhabiting a tropical freshwater stream (Pérou River, Guadeloupe)
Lepoint, Gilles ULiege; Marichal, Nicolas; Troupin, Charles ULiege et al

Poster (2012)

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

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

Detailed reference viewed: 73 (3 ULiège)