References of "Scientific congresses and symposiums"
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See detail共生菌Hamiltonella defensa对蚜虫的影响
Guo, Jianqing ULg; Wang, Zhenying

in 中国青年植保科技创新 (2016, December)

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See detailThe added value of new GNSS for ionosphere monitoring
Warnant, René ULg; Deprez, Cécile ULg

in Proceedings of Navitec 2016 (2016, December)

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See detailImpacts socioéconomiques de la migration des chefs de ménage dans la région de Tahoua
Moussa Dit Kalamou, Mahamadou; Andres, Ludovic ULg; Yamba, Boubacar et al

Conference (2016, December)

Du fait de sa position stratégique entre l’Afrique du Nord et l’Afrique subsaharienne, le Niger est une terre d’intense mobilité par le départ et le transit de nombreux migrants dont le flux venait de ... [more ▼]

Du fait de sa position stratégique entre l’Afrique du Nord et l’Afrique subsaharienne, le Niger est une terre d’intense mobilité par le départ et le transit de nombreux migrants dont le flux venait de tous les pays de l’Afrique de l’Ouest. Le contexte géopolitique actuellement dominé par l’insécurité dans la partie Est du pays et le nord du Nigeria voisin (guerre imposée par la nébuleuse Boko Haram) ; et l’instabilité des pays frontaliers à l’Ouest (Mali) et au Nord (Libye) poussent les populations à chercher refuge en migrant massivement (plus de 60% des migrants en direction du Maghreb et l’Europe passent par le Niger selon l’Organisation Internationale pour les Migrations) et irrégulièrement vers les grandes villes minières du nord du Niger (Agadez, Arlit, Djado et Dirkou) qui sont les portes d’accès au pays de l’Afrique du Nord et ensuite à la méditerranée afin d’atteindre les pays européens. A tous ces problèmes sécuritaires, s’ajoute le problème d’insécurité alimentaire et foncière qui oblige les populations rurales comme celles de la région de Tahoua à migrer pour un exode temporaire ou saisonnier qui finira par une migration de longue durée à force de prendre goût à l’aventure. Les ruraux qui font face aux déficits cycliques imposés par le changement climatique vont à la recherche du mieux-être et du complément alimentaire des ménages. Cet article traite de l’exode qui sera considéré comme une migration locale et en même temps une initiation à la migration régionale et intercontinentale. Il ressortira les impacts socio-économiques de l’exode agissant sur les ménages dans la région de Tahoua au Niger. [less ▲]

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

Poster (2016, December)

Jeavons syndrome (JS) is an uncommon form of juvenile epilepsy. In some family affected by JS, the gene of importin-8 (IPO8) a member of karyopherin superfamily of proteins, has been found mutated ... [more ▼]

Jeavons syndrome (JS) is an uncommon form of juvenile epilepsy. In some family affected by JS, the gene of importin-8 (IPO8) a member of karyopherin superfamily of proteins, has been found mutated. Karyopherin are known to regulate nucleo-cytoplasmic transport of many proteins. IPO8, a member of the β-karyopherin sub-family, is reported to control the transport Ago-2, c-Jun and Smad-4 for example, three proteins important for brain development. Here, we show that IPO8 is well expressed in mouse brain at embryonic stage. Moreover inhibition of IPO8 mRNA by shRNA in-utéro-electroporation (IUE), impairs early neuroblast migration as weel as IUE overexpression of mutated form of human IPO8. So, abnormal brain development due to IPO8 mutations could be at the origin of Jeavons Syndrome, Chilhood abscence evolving (CAE) and/or juvenile myoclonic epilepsy (JME). [less ▲]

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See detailThe "graptolite hypothesis" or how to turn a palaeobotanical evidence into a scientific puzzle
Gerrienne, Philippe ULg; Tinn, Oive; Versteegh, Gerard et al

Conference (2016, December)

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See detailProperties of Jupiter’s auroral acceleration region inferred with HST-STIS spectral images
Ray, Licia C.; Arridge, Christopher S.; Gustin, Jacques et al

Poster (2016, December)

Jupiter’s dynamic auroral region is the signature of magnetosphere-ionosphere coupling. Precipitating auroral electrons are part of a current system which transports angular momentum from the planetary ... [more ▼]

Jupiter’s dynamic auroral region is the signature of magnetosphere-ionosphere coupling. Precipitating auroral electrons are part of a current system which transports angular momentum from the planetary atmosphere to sub-corotating magnetospheric plasma. The magnitude of the currents and hence precipitating energy flux, are sensitive to the characteristics of the high-latitude magnetosphere, in particular the location of the auroral acceleration region (AAR) and the density and temperature of the high-latitude electron population. We use HST STIS observations of Jupiter’s aurora (Gustin et al. [2016]) to infer the location of the AAR and the properties of the precipitating auroral electrons. To do this, we determine the energy of the precipitating electrons and incident energy flux for the two distinct regions within the main aurora and within flare regions. The resulting relationships between energy flux and electron precipitation energy for the main auroral emission are then compared to the theoretical relationship derived by Lundin & Sandahl [1978], in order to derive the location of the AAR and the temperatures and densities of the electrons at the top of the AAR prior to acceleration. We find that that each emission region is best reproduced using a multiple auroral acceleration regions with different properties, rather than a single auroral acceleration region with a varying potential drop strength. [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 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 isoinertial-pneumatic ratio on force-velocity-power relationships
Jidovtseff, Boris ULg; Avrillon, Simon; Hug, François et al

Conference (2016, November 29)

Introduction: Isoinertial contractions are effective to generate maximal force during the initiation of the movement whereas they do not provide an appropriate training stimulus to generate force once ... [more ▼]

Introduction: Isoinertial contractions are effective to generate maximal force during the initiation of the movement whereas they do not provide an appropriate training stimulus to generate force once accelerative phase has been developed (1). Pneumatic resistance is one alternative that has been developed to overcome the aforementioned limitations associated with isoinertial contractions. This technique allow higher initial velocity and reduce the decrease of force towards the end of the concentric phase (1). There is some training interest by combining isoinertial and pneumatic loading. The aim of this study was to determine how different isoinertial-pneumatic ratio influence the force-velocity-power relationships during bench-press. Methods: Fifteen participants performed bench press at 30%, 45%, 60%, 75%, and 90% of their 1RM, with five isoinertial(I)-pneumatic(P) resistance ratio : 100%I/0%P, 75%I/25%P, 50%I/50%P, 25%I/75%P, and 0%I/100%P. Velocity, force and power were assessed using a linear transducer and mechanical parameters measured by the pneumatic ergometer. Force-, velocity- and power-time patterns were averaged over the push-off phase to build the corresponding force-velocity and power-velocity relationships for each resistance ratio. Results: The increase in pneumatic part in resistance ratio elicited higher movement velocity and lower force level from 0% to 80% of the concentric phase. The increase in isoinertial part in resistance balance resulted in higher velocity towards the end of the movement. As a consequence, the use of isoinertial resistance oriented the force-velocity relationship towards force, whereas pneumatic resistance elicited a more velocity-oriented profile. Conclusion: Pneumatic-oriented resistance could be used to develop initial velocity and force towards the end of the push-off. Isoinertial-oriented resistance should be used to develop maximal force and maximal power. Resistance modality could be modulated according to training objectives. Références : 1. Frost et al. A comparison of the kinematics, kinetics and muscle activity between pneumatic and free weight resistance. Eur J Appl Physiol. 2008;104:937-56. [less ▲]

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See detailAnalytical Challenges in the Study of South-North Intra-EU Mobility
Lafleur, Jean-Michel ULg; Stanek, Mikolaj

Conference (2016, November 29)

This presentation discusses the challenges met in measuring the flows of Southern European EU migrants who moved to North Western Europe during the financial and economic crisis that started in 2008. The ... [more ▼]

This presentation discusses the challenges met in measuring the flows of Southern European EU migrants who moved to North Western Europe during the financial and economic crisis that started in 2008. The presentation shows that EU wide and national databases have strenghts and weaknesses and that further improvement in statistical data collection process could help the understanding of complex migratory patterns. More details is available on this research by downloading the free e-bbok at the following address: http://www.springer.com/gp/book/9783319397610 [less ▲]

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See detailAliments et alimentation dans les sources documentaires coptes : quatre exemples (VIe-VIIIe siècles)
Carlig, Nathan ULg

Conference (2016, November 29)

Study of four Coptic documents on papyrus and ostracon from the sanctuary of St. Colluthus at Antinoopolis and from the Theban Tomb 29, in order to highlight the type of food and their context of use in ... [more ▼]

Study of four Coptic documents on papyrus and ostracon from the sanctuary of St. Colluthus at Antinoopolis and from the Theban Tomb 29, in order to highlight the type of food and their context of use in Byzantine and Early Arab Egypt. [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 detailInterfacial and foaming properties of five commercial dairy products and two types of proteose-peptone fractions
Ripollés, D.; Parrón, J.A.; Petrut, R. et al

Poster (2016, November 28)

Functional properties of surfactants contained in dairy products, like emulsifying, foaming and wetting properties, result from their capacity to reduce the surface tension by adsorption and formation of ... [more ▼]

Functional properties of surfactants contained in dairy products, like emulsifying, foaming and wetting properties, result from their capacity to reduce the surface tension by adsorption and formation of cohesive films at the interface. A wide variety of techniques have been developed to determine surface tension, but those that give dynamic measurements, rather than equilibrium measurements of surface tension, are more suitable to study functional properties. Furthermore, the surface activity of surfactants depends on the mechanical properties of the films that are formed at the interface, which are strongly influenced by the intramolecular interactions established. The aim of this study was to investigate the kinetics of adsorption, mechanical properties of monolayer films and foaming properties of five different commercial dairy products (whey protein concentrate (WPC), buttermilk, butter serum and two skimmed milks) and two proteose-peptone fractions. [less ▲]

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See detailLa zircone en prothèse dentaire et implantaire
MAINJOT, Amélie ULg

Conference (2016, November 28)

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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 detailLes nouveaux céramiques hybrides usinables : vont-ils révolutionner notre pratique ?
MAINJOT, Amélie ULg

Conference (2016, November 26)

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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 médecine générale en mutation : perspectives sociologiques
Slomian, Cynthia ULg

Conference (2016, November 26)

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See detailReturn to play after injection of PRP to treat tendinopathies
Kaux, Jean-François ULg

Conference (2016, November 26)

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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 detailMise en débat du marxisme et enjeux rhétoriques dans les textes de présentation des revues intellectuelles de l’immédiat après-guerre
Franck, Thomas ULg

Conference (2016, November 25)

À la suite d’une analyse de la mise en débat du marxisme au sein des revues intellectuelles de l’immédiat après-guerre et d’une étude de la trajectoire idéologique d’un intellectuel particulier, Gérard ... [more ▼]

À la suite d’une analyse de la mise en débat du marxisme au sein des revues intellectuelles de l’immédiat après-guerre et d’une étude de la trajectoire idéologique d’un intellectuel particulier, Gérard Genette, au sein de l’espace des revues militantes, cette communication analyse le cas particulier de la revue Socialisme ou barbarie dans une double perspective d’analyse du discours et de philosophie politique. Notre hypothèse serait la suivante : les revues favoriseraient, par leur matérialité discursive et éditoriale, l’émergence de débats idéologiques plus ou moins polémiques et oppositionnels autour du marxisme. En replaçant la création de ces revues dans leur contexte socio-discursif, nous entendons interroger la manière dont les textes de présentation singularisent, tout en les reproduisant, un interdiscours et une socialité bien précis. Si l’étude des articles parus dans Les Temps Modernes et Critique de mai à décembre 1946 a pu mettre en relation une obsession discursive quant aux marxismes orthodoxes et hétérodoxes et à la montée historique du P.C.F., le contexte de création de Socialisme ou barbarie (1949) nous obligera à tenir compte d’événements politiques et culturels divers (Guerre froide, constitution des deux Allemagnes, création de la revue La Table ronde, parution d’articles consacrés aux évolutions politiques et idéologiques dans Les Temps Modernes, Critique et Esprit, Traité de Londres, création de la République Populaire de Chine, centenaire du Manifeste du parti communiste, etc.). Notre communication se concentrera plus particulièrement sur le texte de présentation de la revue dans ce qu’il dit d’une historicité discursive et idéologique précise. Les textes de positionnement et de repositionnement des revues permettent en effet de dégager un ensemble d’enjeux et de tensions à l’oeuvre au sein de la communauté intellectuelle. Leur caractère plus ou moins affirmatif, parfois à la limite du pamphlétaire, entraîne une série de traits rhétoriques significatifs (attaques ad hominem, questions rhétoriques, allo-attributions, registre polémique, vocabulaire de l’attaque-défense, ironie, etc.), traduisant des positions idéologiques, qu’il sera nécessaire d’analyser dans le premier texte de la revue de Castoriadis et Lefort. L’attention portée aux thématiques marxistes se justifie par la véritable croissance des discours à ce propos dans l’immédiat après-guerre et par le besoin réel qu’éprouvent les intellectuels français de se positionner par rapport au P.C.F. et aux autres mouvances marxistes. Un rapport particulier se crée dès lors entre le savoir et une certaine temporalité que le genre de la revue met en oeuvre au travers de son éclatement et de sa périodicité. En effet, par la transmission d’un état des travaux non abouti et par l’urgence de sa situation sociale, il permet de saisir sur le vif un savoir en cours d’élaboration, constituant ainsi une forme de « mémoire immédiate » faisant état d’une histoire des idées collectives. Le rythme des publications, les stratégies de positionnement idéologique, la circulation des concepts et la nécessité de répondre aux besoins des lecteurs rendent ces savoirs intrinsèquement dynamiques et critiques, dans une constante interaction entre le monde social et les idées qui le façonnent. Comme le note Yves Peyré, dans Les Revues littéraires au XXe siècle, on trouve, d’une part, un « acte militant à la racine même de la revue » et, d’autre part, la réponse à un besoin de mettre en scène, par une polyphonie de voix, un dialogue agissant sur la réalité sociale et se construisant par le profit de débats, de dissonances et de dissensions internes et externes. [less ▲]

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See detailSommeil, éveil et cognition au cours du temps
Vandewalle, Gilles ULg

in Bulletin de la Société Royale des Sciences de Liège (2016, November 25)

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See detailLa communauté politique à l'épreuve de la responsabilité
Servais, Christine ULg

Conference (2016, November 25)

Il s’agit dans cette communication de proposer un modèle pour analyser la manière dont l’espace public est structuré par l’énonciation journalistique en partant de la question de la responsabilité.

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See detailWhat can a diagnosis do? The case of the "genetization" of autism
Thoreau, François ULg; Duysens, Fanny ULg

Conference (2016, November 25)

The loose condition of "autism" is undergoing through a broad process of (re)definition under the aegis of genomic medicine, which promises to find (epi)genetic causes to autism, or at least to some forms ... [more ▼]

The loose condition of "autism" is undergoing through a broad process of (re)definition under the aegis of genomic medicine, which promises to find (epi)genetic causes to autism, or at least to some forms of the Autism Spectrum Disorder. What is at stake is a scientific controversy about the very definition of the condition, i.e. the diagnosis itself. Whether it is considered primarily as a psychopathology or as a genetic disorder has consequences. It has implications regarding who would have the authority to diagnose the condition but also about the ways of taking care of persons with autism. In this paper, we depart from the paradox that some patients' organizations claim for a "geneticization" of the condition, so as to get rid of any sort of "psy-" related dimensions. It seems paradoxical because if the causes of autism are to be found in the genes, and hereby partly determined, it would seem to imply that the margins for effective therapy are narrowing down. We want to test the hypothesis that the more objective, "naturalized" a diagnosis is, the more it opens up possibilities for broadening the therapeutic reach outside the autist bodies, questioning the "milieu" of the disorder — the environment through which it is produced and the wealth of linkages and relationships through which living with autism could be eased. In other words, stressing that the diagnosis is a site to explore these contested dimensions of autism, its "geneticization" could lead to more active uptakes in patients care, whereas blurry diagnosis could not afford a similar reach. Following a pragmatic stance of an "art of consequences" (I. Stengers), we investigate the tensions raised by a genetic diagnosis which tends to "objectify" or "naturalize" the causes of the condition with respect to the lived experiences of persones with autism and their relatives, following some of the contested dimensions of a "politics of diagnosis" in their effects on affected autistic bodies and minds. To unfold those issues, our ongoing inquiry considers the interactions between various persons and institutions involved in the debate in Belgium. [less ▲]

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See detailDétourner les jeux vidéo : une nouvelle forme de jeu ?
Barnabé, Fanny ULg

Conference (2016, November 25)

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See detailPost-fire assessment of concrete structures. Safe for continued use?
Molkens, Tom; Gernay, Thomas ULg; Van Coile, Ruben

Conference (2016, November 24)

After a fire in a building, questions arise regarding the post-fire fire capacity of the structure. Assessment of post-fire capacity of structural elements should consider the residual safety level which ... [more ▼]

After a fire in a building, questions arise regarding the post-fire fire capacity of the structure. Assessment of post-fire capacity of structural elements should consider the residual safety level which, in the absence of codification, requires performing a full probabilistic analysis. Therefore, an easy-to-use method is presented which allows to make a probabilistic calculation, using only analytical formulas and a pre-calculated graph. The method is applied to a real case study, consisting of a fire that took place in an apartment building in Belgium, indicating sufficient load bearing capacity for further use. [less ▲]

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See detailIntroduction : pour une troisième voie entre hack et yack ?
Dozo, Björn-Olav ULg

Conference (2016, November 24)

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See detailUncertainties in determination of fire resistance by experimental testing and by calculation
Dumont, Fabien ULg; Gernay, Thomas ULg; Franssen, Jean-Marc ULg

Conference (2016, November 24)

In Europe, certification of the fire resistance of building construction elements can be assessed by experimental testing or by calculation. To date, both communities (testing and calculation) express the ... [more ▼]

In Europe, certification of the fire resistance of building construction elements can be assessed by experimental testing or by calculation. To date, both communities (testing and calculation) express the fire resistance results in a deterministic way, i.e. each fire resistance result consists in a single number as if there was no uncertainty. However, when asking different partners within a community to assess the fire resistance of a given element of building construction subjected to a given fire scenario (a so-called “round robin” exercise), the reported results exhibit a very significant variability. Recent efforts have been undertaken to evaluate the extent of the scatter for fire resistance results, i.e. a process of "uncertainty evaluation". This process recognizes the fact that, for a given element of building construction and a given fire scenario, only a probability distribution (as opposite to a deterministic value) can be attributed to the fire resistance result. This approach opens the door to probabilistic reporting as an alternative to deterministic one. [less ▲]

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See detailL'évangile digital. Théories et technologies chez H.M. Enzensberger
Hamers, Jérémy ULg

Conference (2016, November 24)

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See detailConjonctivo Mullerectomy in Eyelid Ptosis Surgery
XHAUFLAIRE, Gaël ULg

Conference (2016, November 23)

Conjonctivo-mullerectomy : codified surgical technique for eyelid ptosis repair. Indications, unusual indications, contraindications, limits, risks. Technique description. Video presentation.

Detailed reference viewed: 15 (2 ULg)
See detailLe pervers, le psychopathe et les limites de l’empathie
Englebert, Jérôme ULg

Conference (2016, November 22)

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See detailIndexer les Thèses de master en médecine générale et de famille?
Jamoulle, Marc ULg

Conference (2016, November 22)

Les responsables des formations à la Médecine générale et de famille (MG/MF) des trois universités francophones de Wallonie et Bruxelles souhaitent prévoir la conservation et l’édition online des Travaux ... [more ▼]

Les responsables des formations à la Médecine générale et de famille (MG/MF) des trois universités francophones de Wallonie et Bruxelles souhaitent prévoir la conservation et l’édition online des Travaux de Fin d’Etude (TFE) des Internes en formation. Assembler et publier un grand nombre de travaux montera la force et l’importance du travail fourni par les Internes. La mise à disposition publique nécessite donc un système d’indexation adéquat à la pratique de la MG/MFi. Il s’agit ici de littérature dite « grise » mais dont l’importance ne doit pas être méconnueii En bibliographie usuelle, les publications sont généralement indexées par les Medical subject Heading (MeSH) de la National Library of Medicineiii. Toutefois, il n’est pas aisé de standardiser l’indexation au départ d’une liste de plus de 25.000 MeSH non prévu spécifiquement pour l’exercice de la MG/MF. Dans le cadre de sa thèse de doctorat en médecine générale et de famille (ULg, Prof. Vanmeerbeek), l’auteur a développé un tel système d’indexation. Une nouvelle classification des items non-cliniques, développées sous le nom de Q-Codes a été élaboréeiv. Elle est associée à la Classification Internationale des soins Primaires, deuxième édition (CISP-2). Ces deux outils forment ensemble un instrument de catégorisation de l’activité et des publications en MG/MF. Il est connu sous l’acronyme 3CGP, ou Core Content Classification in GP/FM.v 3CGP offre moins de 900 codes. [less ▲]

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See detailA MACRO-ELEMENT FOR THE NONLINEAR ANALYSIS OF DEEP BEAMS BASED ON A THREE-PARAMETER KINEMATIC MODEL
Liu, Jian ULg; Mihaylov, Boyan ULg

Conference (2016, November 22)

This paper presents a computationally-effective macro element for predicting the complete shear response of RC deep beams. The element stems from a three-parameter kinematic theory (3PKT) for the shear ... [more ▼]

This paper presents a computationally-effective macro element for predicting the complete shear response of RC deep beams. The element stems from a three-parameter kinematic theory (3PKT) for the shear strength and deformation capacity of deep beams under double curvature. The macro element consists of two rotational springs and one transverse spring to simulate the nonlinear flexural and shear behaviour of deep shear spans. The element is applied to two deep beams tested to shear failure under three-point bending. The results are used to study the effect of unsymmetrical shear failures on the pre- and post-peak behaviour of nominally symmetrical members. It is found that the post-peak response is sensitive to the unloading path of the shear resisting mechanisms as well as to the global roughness of the critical diagonal cracks. Based on these analyses, modifications to the constitutive relationships of the shear mechanisms are proposed, and the macro element is applied to a continuous deep beam. It is shown that the model adequately captures the complete behaviour of the beam, including the redistribution of forces following the shear failure in the critical shear span. [less ▲]

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See detailModelling the ultimate shear behaviour of deep beams with internal FRP reinforcement
Mihaylov, Boyan ULg

in Performance-based approaches for concrete structures, fib Symposium Proceedings, Cape Town 21 to 23 November 2016 (2016, November 22)

Fiber reinforced polymer (FRP) reinforcement in deep beams has been proposed as an alternative to steel reinforcement to increase the durability of members in corrosive environments. Since FRP ... [more ▼]

Fiber reinforced polymer (FRP) reinforcement in deep beams has been proposed as an alternative to steel reinforcement to increase the durability of members in corrosive environments. Since FRP reinforcement has lower stiffness than steel reinforcement and typically exhibits higher tensile strength, there is a need for new models capable of capturing the effect of these properties on the shear strength of deep beams. This paper proposes such an approach for members without shear reinforcement, which is an extension of a two-parameter kinematic theory (2PKT) for steel-reinforced deep beams. The original approach is modified to account for the effect of large flexural strains on the shear capacity of the critical loading zones in deep beams where the concrete crushes at failure. It is shown that a simple modification based on test data can result in adequate shear strength predictions. It is also shown that the extended 2PKT captures well the effect of reinforcement stiffness, shear-span-to-depth ratio, and section depth on the shear capacity of deep beams with FRP reinforcement. [less ▲]

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See detailPolitiques du corps fantôme et phénoménologie sociale
Cormann, Grégory ULg

Conference (2016, November 21)

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See detailBiobased Processes: Systematically Evaluating Chances and Challenges
Pfennig, Andreas ULg

Conference (2016, November 21)

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See detailIn the Eye of the Beholder: Affect as well as Object Properties Impact Measurement Estimations
Dumitru, Magdalena ULg

Conference (2016, November 19)

e probability of perceiving two objects as being similar is a negative exponential function of the distance between them in an internal psychological space (Shepard 1987). Our experimental studies showed ... [more ▼]

e probability of perceiving two objects as being similar is a negative exponential function of the distance between them in an internal psychological space (Shepard 1987). Our experimental studies showed that this distance and hence the similarity between objects in the same category is modulated by their size, frequency, and manipulability. Our experimental work also revealed that object properties evoked by digit-word expressions modulate numerosity estimations such that “8 elephants” were judged to be more numerous than “8 ants”, for instance. ese ndings extend the literature on human perceptual biases (Binet 1890) by showing that words instantly access rich mental representations. Our latest experimental ndings established that various emotional states signi cantly impact measurement estimations. [less ▲]

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See detailIn Vivo Preclinical Molecular Imaging: From the Laboratory Bench to the Patient.
Plenevaux, Alain ULg

in Pharmaceuticals (2016, November 18), 9(4), 73

Preclinical molecular imaging plays a key role in the study of diseases and the development, evaluation, andvalidation of novel treatment and diagnostic techniques. The actual aim is to facilitate the ... [more ▼]

Preclinical molecular imaging plays a key role in the study of diseases and the development, evaluation, andvalidation of novel treatment and diagnostic techniques. The actual aim is to facilitate the translation of innovative therapies and diagnostic agents into patients by providing in vivo proof-of-principle data in animal models of diseases and accordingly match some of the legal requirements before human clinical trials. The real power of preclinical imaging stems from the fact that in vivo data are non-invasively collected, thus making longitudinal studies possible. The evolution of the disease or the actual impact of innovative treatments can be evaluated in the same animal over a long period of time. The major modalities used in preclinical molecular imaging (all present in our laboratory) are the positron emission tomography (microPET), the X-ray tomodensitometry (microCT) and the magnetic resonance imaging (microMRI). The GIGA-CRC In vivo Imaging at ULg is a multidisciplinary laboratory which relies on a medical cyclotron for radioisotope productions, a radiochemistry unit for the development of new radiopharmaceuticals and process automation, a GMP unit for radiopharmaceutical productions, a preclinical imaging unit and a clinical imagingplatform (with MRI, PET, EEG, TMS, . . . ). All expertise and qualified staff are present on site. Our laboratory has all necessary permission and approval for radiopharmaceutical productions and human clinical trials. During this presentation, we will take as an example the development of the first SV2A radioligand [18F]UCB-H (a-b) to illustrate how we can bring new ideas from the laboratory bench to the patient (Bretin, F., et al. Eur. J. Nucl. Med. Mol. Imaging Res. 2013, 3, 35; Warnock, G., et al. J. Nucl. Med. 2014, 55, 1336–1341). [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 detailPoétiser la Guerre d’Espagne : "Constancio y Manolo" de José Muñoz et Carlos Sampayo.
Dejasse, Erwin ULg

Conference (2016, November 18)

José Muñoz and Carlos Sampayo’s Constancio y Manolo (1976) is their seventh story featuring New York-based detective Alack Sinner. It depicts a Spanish family whose patriarch fought for the Republicans ... [more ▼]

José Muñoz and Carlos Sampayo’s Constancio y Manolo (1976) is their seventh story featuring New York-based detective Alack Sinner. It depicts a Spanish family whose patriarch fought for the Republicans during the Civil War. It also mentions events that took place when Constancio y Manolo was being made: the US presidential election, the death of Francisco Franco and the consequent fall of Spanish dictatorship, and, albeit implicitly, the rise of a similar military, theocratic, and violent regime in the cartoonists’ native country, Argentina. The graphic style is heterogeneous, the main plot is fragmentary and numerous secondary stories interfere with its development; and yet, we are paradoxically dealing with a highlycoherent work. Muñoz and Sampayo’s poetics of fragments are put in the service of their own worldview, committed to resist against all mechanisms of oppression and expressing a deep empathy for all those left out of “economic progress”. [less ▲]

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See detailMichel Franchimont, un professeur : quels changements dans l’enseignement du droit dans les universités depuis lors?
Kéfer, Fabienne ULg

Conference (2016, November 18)

Il s'agit de faire le point sur les évolutions de l'enseignement du droit dans les universités belges, et en particulier celle de Liège, sur la période 1994-2016.

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See detailAzacytidine prevents experimental xenogeneic graft-versus-host disease without abrogating graft-versus-leukemia effects
Ehx, Grégory ULg; Fransolet, Gilles ULg; de Leval, Laurence ULg et al

Conference (2016, November 18)

The demethylating agent 5-azacytidine (AZA) has proven its efficacy as treatment for myelodysplastic syndrome and acute myeloid leukemia. In addition, AZA can demethylate FOXP3 intron 1 (FOXP3i1) leading ... [more ▼]

The demethylating agent 5-azacytidine (AZA) has proven its efficacy as treatment for myelodysplastic syndrome and acute myeloid leukemia. In addition, AZA can demethylate FOXP3 intron 1 (FOXP3i1) leading to the generation of regulatory T cells (Treg). Here, we investigated the impact of AZA on xenogeneic graft-versus-host disease (xGVHD) and graft-versus-leukemia effects in a humanized murine model of transplantation (human PBMCs-infused NSG mice), and described the impact of the drug on human T cells in vivo. We observed that AZA improved both survival and xGVHD scores. Further, AZA significantly decreased human T-cell proliferation as well as IFN-γ and TNF-α serum levels, and reduced the expression of GRANZYME B and PERFORIN 1 by cytotoxic T cells. In addition, AZA significantly increased Treg frequency through hypomethylation of FOXP3i1 as well as increased Treg proliferation. The later was subsequent to higher STAT5 signaling in Treg from AZA-treated mice, which resulted from higher IL-2 secretion by conventional T cells from AZA-treated mice itself secondary to demethylation of the IL-2 gene promoter by AZA. Importantly, Tregs harvested from AZA-treated mice were suppressive and stable over time since they persisted at high frequency in secondary transplant experiments. Finally, graft-versus-leukemia effects (assessed by growth inhibition of THP-1 cells, transfected to express the luciferase gene) were not abrogated by AZA. In summary, our data demonstrate that AZA prevents xGVHD without abrogating graft-versus-leukemia effects. These findings could serve of basis for further studies of GVHD prevention by AZA in acute myeloid leukemia patients offered an allogeneic transplantation. [less ▲]

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See detailEVALUATING THE SPECIFICITY OF [18F]UCB-H FOR THE ISOFORM SV2A, COMPARED WITH ISOFORMS SV2B AND SV2C
Serrano Navacerrada, Maria Elisa ULg; Aerts, Joël ULg; Bahri, Mohamed Ali ULg et al

Poster (2016, November 18)

Background: SV2A is the most studied isoform of the Synaptic Vesicle 2 proteins, which are involved in the synaptic vesicle trafficking, being important in normal and pathological process, like the ... [more ▼]

Background: SV2A is the most studied isoform of the Synaptic Vesicle 2 proteins, which are involved in the synaptic vesicle trafficking, being important in normal and pathological process, like the epilepsy (1, 2). [18F]UCB-H was developed like a tool to study the role of this isoform with neuroimaging techniques (3, 4). The objective of this study was to evaluate its specificity to this isoform comparing with the others, through a competition assay in rats with ex-vivo autoradiography and mPET imaging. Methods: Forty male Sprague-Dawley were used in ex-vivo autoradiography experiments (N=20) and in microPET imaging (N=20). Animals were pre-treated 30 minutes before the injection of [18F]UCB-H with a dose IP either of vehicle, Keppra (SV2A ligand), UCB068 (SV2B ligand) or UCB054 (SV2C ligand). Ex-vivo autoradiography was carried out 5 minutes after radiotracer injection while mPET images were acquiring with a dynamic scanner of 1 hour. Data were expressed in Standard Uptake Value and then, the area under the curve was calculated for the total process. Results: In ex-vivo autoradiography, ANOVA of two-ways showed statistical significant differences in brain uptake of [18F]UCB-H among the groups pretreated with Keppra or the ligand for SV2B and the control group. Regarding mPET data, statistical significant differences were found between the group injected with keppra and the rest of groups. Conclusion: Even if a considerable affinity between the ligands UCB068 and UCB054, and the receptor for the isoform SV2A exists, it is only detected during the first 5 minutes (ex-vivo technique), being certainly due to a nonspecific binding. This binding is not strong enough to show a direct competition with the radiotracer during a mPET acquisition. These results allow us to conclude that [18F]UCB-H is a suitable radiotracer for the imaging of the isoform SV2A in vivo, allowing us the clinical study about the molecular base of a disease with a high population impact, like the epilepsy. [less ▲]

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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 detailDiscutante du panel 'cohésion sociale et participation sociale'
Gavray, Claire ULg

Conference (2016, November 17)

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See detailLe facteur kurde dans les conflits au Moyen-Orient.
Bayramzadeh, Kamal ULg

Conference (2016, November 17)

Le facteur kurde dans les conflits au Moyen-Orient.. Résumé, L’objectif principal de cette communication est de montrer les enjeux politiques et sécuritaires de l’implication des Kurdes dans les conflits ... [more ▼]

Le facteur kurde dans les conflits au Moyen-Orient.. Résumé, L’objectif principal de cette communication est de montrer les enjeux politiques et sécuritaires de l’implication des Kurdes dans les conflits au Proche et au Moyen-Orient. La participation des Kurdes à la résistance à l’État islamique et leur rôle déterminant dans le conflit en Irak et en Syrie ont fortement augmenté leur poids politique. Depuis le déclenchement du conflit en Syrie la question kurde est devenue un sujet de préoccupation pour certains pays de la région qui ont peur des conséquences de la naissance d’une entité fédérale dans le Nord de la Syrie. Ceci crée un dilemme de sécurité pour la Turquie et l’Iran qui ont des convergences d’intérêt sur la question kurde. C’est pourquoi nous constatons depuis quelques mois l’intensification de la guerre entre le PKK et la Turquie et l’entrée de l’armée turque dans le Nord de la Syrie, à quoi il faut ajouter la reprise de la lutte armée du PDKI dans le Kurdistan iranien. Ce qui montre le caractère transfrontalier du facteur kurde au Moyen-Orient [less ▲]

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See detailLes indices de détection de patron de réponse inapproprié de type carré-moyens non-pondérés: à manipuler avec précaution!
Beland, Sebastien; Raiche, Gilles; Magis, David ULg et al

Conference (2016, November 17)

Le carré-moyen non-pondéré U comme indice de détection (unweighted mean square statistics) (Wright & Stone, 1979) et sa version standardisée ZU (Wright, 1980) sont parmi les indices de détection de ... [more ▼]

Le carré-moyen non-pondéré U comme indice de détection (unweighted mean square statistics) (Wright & Stone, 1979) et sa version standardisée ZU (Wright, 1980) sont parmi les indices de détection de patrons de réponse inappropriés paramétriques les plus connus. On retrouve l’un et/ou l’autre de ces indices dans des logiciels commerciaux ou gratuits tels que RUMM2030, FACETS ou la librairie R eRm en plus d’en faire mention dans les articles les plus cités sur le sujet (Karabatsos, 2003; Meijer et Sijtsma, 2001). Durant les dernières décennies, quelques voix se sont élevées afin de sensibiliser les utilisateurs aux problèmes que présentent U et ZU (Karabatsos, 2000; Smith, 1991). Ils semblent, en effet, présenter des scores extrêmes qui rendraient leur utilisation inadéquate dans certaines situations. Cette présentation aura comme objectif d’étudier les limites des indices U et ZU. Nous utiliserons une étude de simulation et différents modèles de réponses à l’item dichotomiques afin de soutenir notre propos. Les auteurs de l’étude concluront leur présentation en discutant de l’importance de manipuler ces indices avec précaution. [less ▲]

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See detailErasurism, Peritext, Hypertext & Infratext
Delville, Michel ULg

Conference (2016, November 16)

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See detailAnalysis of the interactions of fatty acyds hydroperoxides with biomimetic membranes by complementary biophysical approaches
Deboever, Estelle ULg; Nasir, Mehmet Nail ULg; Deleu, Magali ULg et al

Poster (2016, November 16)

In the actual context, biopesticides have emerged as a main alternative to conventional agriculture1. Hence, elicitors are metabolites naturally produced by microorganisms, pathogenic or not, and plants ... [more ▼]

In the actual context, biopesticides have emerged as a main alternative to conventional agriculture1. Hence, elicitors are metabolites naturally produced by microorganisms, pathogenic or not, and plants which are able to induce the natural resistance of plants. Also, they have proved to be excellent candidates for biological control. In this context, the lipoxygenase pathway leads to the formation of fatty acid degradation products, called oxylipins, which appear to be crucial agents in plant defence mechanisms2,3. Moreover, with their broad spectrum of action and their possible inducibility, oxylipins appear to be promising candidates for their use as elicitors4. This work focuses on two hydroperoxy-derived oxylipins, the 13(S)-hydroperoxy-octadecadienoic acid (13-HPOD) and the 13(S)-hydroperoxy-octadecatrienoic acid (13-HPOT). The study of the interaction of such compounds with representative plant plasma membrane lipids is essential to understand plant resistance mechanisms. Several in silico and experimental techniques of biophysics showed that acyl-hydroperoxides have significant adsorption capacity and a strong affinity for model membranes. They may also penetrate biological membrane but no permeabilisation effect was observed in this work. Slight conformational differences seem to have a significant impact on their ability to interact with plant plasma membranes. Based on these results, further investigation of the interactions of fatty acids hydroperoxides, even more on the 9-forms, with plant plasma membranes and eventually in the presence of phytopathogenic species, would allow a better understanding of the innate immunity and, on the longer term, could lead to the development of new elicitors with biological mechanisms potentially independent of membrane protein receptors. [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 detailComment former à l'argumentation?
Scheepers, Caroline ULg; Delneste, Stéphanie

Conference (2016, November 16)

Confronté à des questions qui touchent à l'éthique, quelle conduite argumentative va mobiliser un petit groupe d'intervenants pour débattre des questions posées? Plus concrètement, quel sera le degré d ... [more ▼]

Confronté à des questions qui touchent à l'éthique, quelle conduite argumentative va mobiliser un petit groupe d'intervenants pour débattre des questions posées? Plus concrètement, quel sera le degré d'argumentativité du discours? Quelle est la visée des échanges : convaincre ou persuader? Quels types d'arguments seront convoqués? Sur quelles valeurs se fonderont-ils? Quels phénomènes de contre-argumentation émergeront? L'atelier, pratique, consiste à mettre en situation les participants (profs de philo au primaire, au secondaire ou au supérieur) de débattre ou d'analyser un débat. [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 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.

Detailed reference viewed: 37 (9 ULg)
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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)

Detailed reference viewed: 15 (1 ULg)
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 detailSavant éclairé ou génie de l’ombre ? Les figures croisées de Tesla et Edison dans la culture populaire et médiatique
Stienon, Valérie ULg

Conference (2016, November 16)

L'épisode de la "guerre des courants électriques" survenue aux États-Unis dans les années 1880-1890 a donné lieu à de nombreuses représentations qui posent les inventeurs Thomas Edison et Nikola Tesla ... [more ▼]

L'épisode de la "guerre des courants électriques" survenue aux États-Unis dans les années 1880-1890 a donné lieu à de nombreuses représentations qui posent les inventeurs Thomas Edison et Nikola Tesla comme les protagonistes d’une guerre dramatisée autour de la question de l’électricité, avec ses possibles, ses infrastructures et son pouvoir économique, occasion de rejouer l’opposition des deux légendes, merveilleuse et noire, de l’électricité. Tous les matériaux sont réunis pour forger la légende. Une polémique à l’impact social important, qui questionne les rôles du savant, la valeur de la vérité scientifique, les considérations commerciales et la part d’ésotérisme liée à une nouvelle énergie touchant à l’invisible. Une proximité des récits scientifiques, médiatiques et littéraires, à propos de ces deux hommes liés à la notoriété et à l’image publique. Un grand potentiel visuel, comme en attestent les démonstrations spectaculaires (électrocutions d'animaux, expérimentations aux chutes du Niagara) et les mises en scène photographiques. À partir du binôme structurel que forment Edison et Tesla dans les représentations culturelles et médiatiques, la communication interroge deux sous-genres spécifiques, les édisonnades et le teslapunk, en analysant leur contexte d'émergence, leurs horizons d'attente et leurs interactions. [less ▲]

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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 detailSang de cordon état des lieux et perspectives
BAUDOUX, Etienne ULg

Conference (2016, November 16)

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See detailThe BCCM/ULC collection to conserve the biodiversity and study the secondary metabolites of Polar cyanobacteria
Lara, Yannick ULg; Durieu, Benoit ULg; Renard, Marine ULg et al

Poster (2016, November 16)

In the Polar Regions, Cyanobacteria are the key primary producers and main drivers of the food webs in a wide range of aquatic to terrestrial habitats. For example, they build benthic microbial mats in ... [more ▼]

In the Polar Regions, Cyanobacteria are the key primary producers and main drivers of the food webs in a wide range of aquatic to terrestrial habitats. For example, they build benthic microbial mats in lakes and soil crusts. Their success in these harsh cold conditions can probably be explained by particular adaptations to survive freeze/thaw cycles, seasonally contrasted light intensities, high UV radiations, dessication and other environmental stresses. The BCCM/ULC public collection is funded by the Belgian Science Policy Office since 2011. It has obtained the ISO9001 certification for deposition and distribution of strains, as part of the multi-site certification for the BCCM consortium. This collection aims to gather a representative portion of the polar cyanobacterial diversity with different ecological origins (limnetic mats, soil crusts, cryoconites, endoliths,….) and make it available for researchers to study the taxonomy, evolution, adaptations to harsh environmental conditions, pigments, and genomic make-up. It presently includes 226 cyanobacterial strains, of which 119 are of Antarctic origin (catalogue: http://bccm.belspo.be/catalogues/ulc-catalogue-search). As shown by morphological identification, the strains belong to five orders (Synechococcales, Oscillatoriales, Pleurocapsales, Chroococcidiopsidales and Nostocales). The 16S rRNA and ITS sequences of the strains are being characterized. The first 85 Antarctic strains already studied are distributed into 25 Operational Taxonomic Units (OTUs = groups of sequences with > 97,5% 16S rRNA similarity), and thus, represent a quite large diversity. Moreover, strains identified as members of the genera Leptolyngbya or Phormidium appear in several lineages. This supports the idea that there is a need to revise the taxonomy of these polyphyletic genera with a simple filamentous morphology. To better understand the functioning, metabolism and adaptative strategies of cyanobacteria in the extreme Antarctic environment, the genome sequencing of 11 strains has been started. Pair-read data from illumina MiSeq runs were obtained and submitted to a bioinformatic pipeline dedicated to the assembly of genomes and search of sequences involved in the biosynthesis of secondary metabolites. Gene cluster prediction analysis allowed to characterize 20 clusters of NRPS, PKS and hybrid NRPS-PKS from 2 to 66kb. Surprisingly, none of the characterized operons had previously been described in the literature. [less ▲]

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See detailInterpellations impossibles. Question à Judith Butler
Borotto, Jessica ULg

Conference (2016, November 16)

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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

Detailed reference viewed: 16 (4 ULg)
See detailAcute regulation of male sexual behavior by brain-derived estrogens
Cornil, Charlotte ULg

Conference (2016, November 15)

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See detailShear banding simulation in clay rock around an underground opening, and its contact mechanism with the gallery’s lining
Charlier, Robert ULg; Salehnia, Fatemeh ULg

in Proc. 5th International conference on geotechnical engineering and soil mechanics (2016, November 15)

Detailed reference viewed: 22 (2 ULg)
See detailActor-Network Theory’s perspectives for musicology
Levaux, Christophe ULg

Conference (2016, November 15)

Detailed reference viewed: 22 (2 ULg)
See detailBurgerwetenschap na Fukushima
Van Oudheusden, Michiel ULg

Conference (2016, November 14)

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See detailSoutenir le développement langagier en maternelle : Développement d’un outil d’observation et de soutien pour les enseignant.e.s en Belgique francophone
Bergeron-Morin, Lisandre ULg; Leroy, Sandrine ULg; Maillart, Christelle ULg

Conference (2016, November 14)

Les effets positifs des contextes éducatifs préscolaires sur le développement langagier des en-fants et par conséquent sur leur réussite éducative subséquente sont maintenant reconnus, particulièrement ... [more ▼]

Les effets positifs des contextes éducatifs préscolaires sur le développement langagier des en-fants et par conséquent sur leur réussite éducative subséquente sont maintenant reconnus, particulièrement auprès des enfants provenant de milieux vulnérables sur le plan socio-économique (Dickinson, 2011). En effet, les enfants ont l’occasion d’y expérimenter de façon quotidienne des interactions riches et diversifiées avec les enseignant.es, susceptibles d’étayer leur langage (Pence et al., 2008). Or, la qualité du soutien au développement langagier offert, qui dépend entre autres de la capacité de l’enseignante à observer et à ainsi s’adapter au niveau de développement langagier de chaque enfant, est très hétérogène d’une groupe à l’autre (Bou-chard et al., 2010; Girolametto et al., 2002). En Belgique francophone, où l’orthophonie dite préventive est encore peu développée, les ensei-gnantes de maternelle font état d’un manque d’outils et de connaissances pour observer le déve-loppement langagier des enfants. L’outil SOLEM (Soutenir et Observer le Langage des Enfants en Maternelle) a été développé pour répondre à ce besoin. MÉTHODE Quatre groupes nominaux ont été réalisés auprès de 39 enseignants, agents psycho-médico-sociaux et directions d’écoles afin d’identifier leurs besoins. Un prototype de l’outil d’observation a été développé et mis à l’essai dans 10 classes pilotes, afin d’en valider la forme et le contenu. 4 enfants par groupe ont été évalué de façon parallèle avec l’Évaluation du Langage Oral (ELO), afin de faire état de la validité concurrente de l’outil SOLEM. RÉSULTATS SOLEM a été développé à partir de constats issus des groupes nominaux : accorder de l’importance aux aspects moins formels du langage, avoir une démarche en arborescence adap-tée à chaque enfant, qui mène à des pistes d’actions adaptées. Les premières mises à l’essai semblent confirmer que SOLEM répond au besoin exprimé par les enseignants.es : identifier les enfants qui ont besoin d’un soutien spécifique sur le plan du développement langagier et obser-ver leur communication pour y ajuster le soutien offert. Les résultats permettent d’aborder une réflexion sur comment l’observation du développement langagier des enfants par l’enseignant.e peut introduire la mise en place de pratiques de soutien aux habiletés langagières dans les groupes de maternelle. [less ▲]

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See detailEvaluation of adaptive facades: Case study, Al Bahar Towers, UAE
Attia, Shady ULg

in Amato, Alex (Ed.) TOGETHER LET’S BUILD A SUSTAINABLE FUTURE (2016, November 13)

The assessment of adaptive facades presents a barrier in light of the fact that there is no settled assessment technique se to systematically reach this goal. Many of the available façade performance ... [more ▼]

The assessment of adaptive facades presents a barrier in light of the fact that there is no settled assessment technique se to systematically reach this goal. Many of the available façade performance evaluation systems or frameworks have restricted applicability for such advanced building facades. The complexity of adaptive or dynamic facades evaluation is related to the performance evaluation of façade elements, systems and overall building performance coupled to occupant behavior and occupant satisfaction. In this context, we present\s a case study for an adaptive sunscreens façade and evaluate its performance and occupant behavior. The evaluation focuses mainly on pre and post construction phase of adaptive facades: The design assist phase (including the durability test, visual mockup, onsite mashrabiya mounting and weather stripping), the commissioning phase (field verification and performance testing) and the monitoring phase. The selected project is a 150 meters high twin tower that stands with honey-comb inspired structure and automated dynamic solar screen that responds to the sun’s movement. These solar screens respond dynamically and automatically to the angle of the sun which improves the control over energy consumption, solar radiation and glare with the ability to admit natural light into the building. The paper is part of the research activities of working group 3 of the European COST Action 1403 on “Adaptive Facades “. Different methods were used for evaluation, this include: interviews with the architect and façade engineer and technical control specialist, occupants, reviews of standard and codes, review of energy models and a systematic design process mapping. A documentation of the case study describing the post construction occupant comfort, and façade operation was prepared. This paper’s audience is mainly project managers, architects, building façade engineers together with facility managers concerned with the process of design, construction and operation of adaptive sunscreens facades. The outcome of this study identifies quantifiable performance indicators and effective strategies for the design and performance evaluation of optimal adaptive facades. [less ▲]

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See detailLike human adipose tissue and dermis, human bone marrow harbor cells with neural crest-associated characteristics.
Wislet, Sabine ULg

Conference (2016, November 12)

Adult neural crest stem cells (NCSC) are of extraordinary high plasticity and promising candidates for a use in regenerative medicine. Several locations like skin, adipose tissue, dental pulp or bone ... [more ▼]

Adult neural crest stem cells (NCSC) are of extraordinary high plasticity and promising candidates for a use in regenerative medicine. Several locations like skin, adipose tissue, dental pulp or bone marrow have been described in rodent. However, very few information is available concerning their correspondence in human tissues. The main objective of this study was therefore to characterize NCSC from adult human bone marrow. In this purpose, we compared human bone marrow stromal cells to human adipose tissue and dermis, already described for containing NCSC. We performed comparative analyses in terms of gene and protein expression, as well as functional characterizations. It appeared that human bone marrow, similarly to adipose tissue and dermis contains NESTIN+ / SOX9+ / TWIST+ / SLUG+ / P75NTR+ / BRN3A+/ MSI1+/ SNAIL1+ cells and were able to differentiate into melanocytes and Schwann cells. Moreover, when injected into chicken embryos, all those cells were able to migrate and follow endogenous neural crest migration pathways. Altogether, the phenotypic characterization and migration abilities strongly suggest the presence of neural crest-derived cells in human adult bone marrow. [less ▲]

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See detailImages et figures. Dispositifs de re-découpage du sensible (Rancière)
Hagelstein, Maud ULg

Conference (2016, November 12)

Dans son historiographie critique (Les noms de l’histoire, 1992 / Figures de l’histoire, 2012), J. Rancière définit pour l’époque contemporaine des formes alternatives de poétique, de mise en récit et de ... [more ▼]

Dans son historiographie critique (Les noms de l’histoire, 1992 / Figures de l’histoire, 2012), J. Rancière définit pour l’époque contemporaine des formes alternatives de poétique, de mise en récit et de mise en visibilité de l’histoire, qui auraient pour effet de mieux prendre en compte les anonymes et de découper autrement le sensible. Dans de nombreux textes (cf. par ex. Le destin des images, sur la « phrase-image »), Rancière étudie les formes d’accompagnement entre images et mots, et pense la figurabilité comme articulation de deux pouvoirs expressifs en un agencement spécifique. Pour échapper au débat stérile sur la préséance de l’image sur le langage (ou vice-versa), on envisagera avec Rancière l’idée selon laquelle l’image serait une « manière dont les choses parlent et se taisent ». L’image ne dit pas mieux les intensités que les mots, mais elle aménage un lieu inédit pour la mise en fiction des paroles de l’histoire. En ce sens spécifique, la figurabilité, comme mise en scène des mots et des images, doit pouvoir compter sur le travail de l’indétermination – comme on le montrera avec quelques exemples cinématographiques. [less ▲]

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See detailLa pollution atmosphérique enregistrée dans les stalagmites de Han-sur-Lesse
Allan, Mohammed ULg; Fagel, Nathalie ULg; Verheyden, sophie

Conference (2016, November 12)

Les spéléothèmes sont maintenant considérées comme précieuses archives climatiques et environnementales sur les continents, offrant un certain nombre d'avantages par rapport à d'autres archives ... [more ▼]

Les spéléothèmes sont maintenant considérées comme précieuses archives climatiques et environnementales sur les continents, offrant un certain nombre d'avantages par rapport à d'autres archives continentales (les sédiments lacustres, les carottes de glace….). Cette archive peut être aisément datables (U/Th, comptage de lamines et 14C), et présentent une haute résolution temporelle (décennale à saisonnière). Cependant, leur potentiel pour l'enregistrement de la pollution de l'environnement est largement inexploré et principalement axé sur la quantification des contributions d'aérosols dans des grottes touristiques. Cette étude est un des premières études qui utilise les spéléothèmes pour retracer la pollution atmosphérique. Basé sur deux spéléothèmes collectées dans la grotte de Han-sur-Lesse (S-Belgique), ce travail a deux objectifs : 1) le premier est de quantifier la concentration du Pb pour la dernière 250 ans, 2) le second objectif est de définir les sources anthropiques prédominantes de Pb en utilisant les rapports isotopiques du Pb et en basant sur les comparaisons avec les données historiques des activités anthropogéniques en Europe et la Belgique. Les concentrations en éléments traces (Al et Pb) (mesurées par LA-ICP-MS et ICP-MS) et les rapports isotopiques du Pb (mesurées par MC-ICP-MS) permettent d'identifier trois intervalles caractérisés par un enrichissement particulier en Pb : de 1880 à 1905 AD, de 1945 à 1965 AD, et de 1975 à 1990 AD. Les spéléothèmes montrent des changements similaires au niveau historique de la pollution atmosphérique connu en Belgique. Les rapports isotopiques du Pb distinguent clairement les sources de Pb et confirment que le charbon et la combustion de l'essence combinée avec des activités métallurgiques régionales étaient les sources prédominantes de la pollution au cours des 250 dernières années. Cette étude met l'accent sur la capacité des spéléothèmes d’enregistrer la pollution atmosphérique. [less ▲]

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See detailLeibniz and the Polyp, or the Metaphysical Puzzle of Life
Dony, Arthur ULg

Conference (2016, November 11)

In this paper, I propose to explore the link between experience and reason in the problem of the apprehension of life. My general claim is that philosophical issues are necessarily involved in a theory of ... [more ▼]

In this paper, I propose to explore the link between experience and reason in the problem of the apprehension of life. My general claim is that philosophical issues are necessarily involved in a theory of living organisms, since identifying a certain entity as a living being is to go beyond its manifestations. In part I, I argue that the empirical approach of the natural sciences cannot fully account for the peculiarity of life. In particular, I argue that the different criteria used to distinguish the living from the non-living, as those proposed in biology, are inadequate, both de facto and de jure. Indeed, they are constantly challenged by inventions of machines displaying features commonly regarded as specific to livings, and also by discoveries of new organisms whose unexpected features overcome the boundaries of our categories. More fundamentally, I hold that these criteria fail to provide sufficient conditions for qualifying beings as living, as long as the external appearances of life can, in principle, be reproduced by lifeless automatons. Therefore the phenomenological aspect of life, which cannot be accessed in a third person point of view (as the perception itself), turns out to be crucial. In the second part, I elaborate on these issues by focusing on the leibnizian theory of living beings. According to Leibniz, the distinctive feature of life is to have of a real unity, which must be conceived as the one to be found in a perceiving soul. After a brief survey on the foundations of this theory, I will emphasize how Leibniz’s attempt to account for the true unity of living beings – as opposed to the accidental unity of non-living things – exemplifies the problematic relationship between the observable properties of organized matter and the inner (or metaphysical) properties of the living as such. In Leibniz’s case indeed, the lack of empirical evidence forces him to resort to philosophical postulates, namely the principle of analogy and the principle of continuity. This latter principle allows him to qualify plants as living beings and to predict the existence of “borderline” organisms as the polyp. Finally, I will propose to consider the discovery of the polyp in the eighteenth century as a case of particular interest and a challenge to the classical conceptions of the living. Among its numerous outstanding properties, the polyp has the faculty to regenerate when cut into pieces, each of them becoming a whole new organism, and to breed by budding. Moreover, a polyp is constituted as a colony of self-contained, smaller polyps. Because of that, it is difficult to determine what the living organism exactly is: is it the colony as a whole or each of its members? And if the whole constitutes a real organism, how shall we explain its oneness? These issues raise the crucial questions of unity and individuality, which are of tremendous importance with regard to the ontological status of life. [less ▲]

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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 detailBehaviour of bulk superconducting trapped field magnets subjected to magnetic fields with a transverse component
Vanderbemden, Philippe ULg; Caps, Hervé ULg; Vanderheyden, Benoît ULg et al

Conference (2016, November 10)

Bulk superconductors can be used as trapped field magnets with unprecedented performances. Such trapped field magnets find a variety of engineering applications, in particular for brushless rotating ... [more ▼]

Bulk superconductors can be used as trapped field magnets with unprecedented performances. Such trapped field magnets find a variety of engineering applications, in particular for brushless rotating machines and levitation devices. Compared to conventional permanent magnets, however, the magnetic field generated by a superconducting trapped field magnet is much more sensitive to the presence of an external field that is not perfectly aligned with the superconductor magnetic moment, i.e. when the external field has a transverse component. A situation where the superconductor experiences a magnetic field with a transverse component is likely to happen several times during running operation of the device. As an example, in a “trapped flux” synchronous machine, any variation of the load of the shaft may lead to a slight misalignment of the magnetic moment of the superconductor (placed in the rotor) with respect to the rotating field (generated by the stator). In such a situation, the superconductor is subjected to a rotating field, and the situation is likely to be different from a situation where the superconductor is subjected to a pure transverse field. In the present work, we aim at examining different scenarios (i.e. transverse or rotating) where the trapped field magnet is subjected to a transverse component. These configurations are examined both experimentally and numerically. The numerical model is used to determine the distribution of currents in the cross-section of the superconductor. We examine the conditions where the rotating field leads to a partial remagnetization of the sample and is therefore less detrimental that the application of a pure transverse field. We also show that the magnetic moment of the sample may behave differently that the field at the surface of the superconductor. Finally, we investigate the behavior of structures where the superconductor is attached to a thin ferromagnetic disk, and show the beneficial effect of such hybrid structures compared to the superconductor alone. Acknowledgements : The research was funded through the University of Liège (ULg) and an ARC grant for Concerted Research Actions, financed by the French Community of Belgium (Wallonia-Brussels Federation), under reference ARC 11/16-03. We greatly acknowledge M. Morita, S. Nariki and H. Teshima from Nippon Steel & Sumitomo Metal Corporation, Futtsu, Chiba. [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 detail两种挥发性化学信息素与小麦-豌豆间作协同作用
Xu, Qingxuan ULg; Chevalier Mendes Lopes, Thomas ULg; Hatt, Séverin ULg et al

Conference (2016, November 10)

当今的害虫防治理念已从传统的“杀灭”转向科学的“调控”,生态调控成为可持续农业领域中的研究热点之一。间作提高农作物的多样性是作物虫害生态调控途径之一,间作作物导致农田生物多样性增加、为天敌昆虫提供食物和避难所,从而使天敌种类和数量增加,为目标害虫控治作用增强。已有结果表明小麦与豌豆间作、混作,不仅有效降低小麦上麦长管蚜的种群数量,增加了天敌控制害虫的稳定性和持续性, ... [more ▼]

当今的害虫防治理念已从传统的“杀灭”转向科学的“调控”,生态调控成为可持续农业领域中的研究热点之一。间作提高农作物的多样性是作物虫害生态调控途径之一,间作作物导致农田生物多样性增加、为天敌昆虫提供食物和避难所,从而使天敌种类和数量增加,为目标害虫控治作用增强。已有结果表明小麦与豌豆间作、混作,不仅有效降低小麦上麦长管蚜的种群数量,增加了天敌控制害虫的稳定性和持续性, 而且可以增产保收、养地改土。一些昆虫取食诱导的挥发物和昆虫自身分泌物(如水杨酸甲酯MeSA、蚜虫报警信息素EBF)具有驱避蚜虫对植食性昆虫进行行为调控的直接防御,还可以通过吸引第三级营养级的天敌昆虫,提升间接防御害虫作用。 为了探索作物间作与行为调控挥发物的协同的控害效果,本研究采用小麦间作豌豆、协同化学信息素(MeSA、EBF)的释放,于比利时Gembloux地区连续两年(2015年3月-8月年和2016年3月-8月)进行田间实验。结果表明与单纯小麦-豌豆间作相比,小麦-豌豆间作配合EBF、MeSA的释放,提高了蚜茧蜂对豌豆蚜的寄生率,对蚜虫天敌草蛉、食蚜蝇、瓢虫也具有强烈的吸引作用,豌豆蚜及麦蚜的无翅蚜田间发生量分别降低达35%和30%。 间作的豌豆可以为天敌提供栖居和食物,有利于蚜虫天敌的繁殖,而豌豆蚜的发生峰期早于麦蚜发生峰期一周左右,因此间作结合挥发物的释放,更有利于豌豆田中的蚜虫主要天敌最大程度的转移到麦田中防控麦蚜,有效降低麦蚜发生峰期的种群数量,两种方法组合构成“吸引-补偿”(Attract–Reward)的机制,将挥发物行为调控与栖境管理两种防控害虫的方法有效的结合起来,进一步增强生防效果,有助于建立综合的小麦害虫绿色防控体系。 [less ▲]

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