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See detailLong term spatial and temporal variability in catches of common spiny lobster Palinurus elephas (Fabricius, 1787) in Corsica (NW Mediterranean): fisheries trends, biological trends or both?
Pere, Anthony; Astrou, Adèle; Patrissi, Michela et al

Conference (2014, May 20)

The small-scale fishing fleet of Corsica (France, NW Mediterranean) is mostly composed of small artisanal boats. The common spiny lobster, Palinurus elephas, is the most valuable of all caught species. As ... [more ▼]

The small-scale fishing fleet of Corsica (France, NW Mediterranean) is mostly composed of small artisanal boats. The common spiny lobster, Palinurus elephas, is the most valuable of all caught species. As a result, it is the main target of most fishermen during the 7-months fishing season. Populations of this species seem to decrease since the 1950's. The aim of this study was to understand if this decline could be linked with overfishing, or if other biological, ecological or climatic factors could explain this population drop. To achieve this goal, we combined 1) a meta-analysis of all data concerning fishing effort and captures in published and grey literature and 2) an on-board monitoring program that started in 2004. Using obtained data, we followed fleet structure, fishing effort and captures evolution from 1950 to 2011. Our results point out an important capture decrease during the 20th century. This trend started during the 1950’s and 1960’s, when trammel nets replaced traditional wood traps. A micro-regional analysis revealed that exploitation intensity widely varied among different areas around the island. Moreover, landings and catch rates showed important spatial and temporal variations. This could be caused by changes in recruitment rates. However, recruitment processes of this species are still poorly understood. Improving our knowledge of common spiny lobster life cycle will likely lead to a more comprehensive and efficient assessment of Corsican stocks of this species. [less ▲]

Detailed reference viewed: 39 (5 ULg)
See detailLa kinase ORF47p codée par le Virus de la Varicelle et du zona : une kinase clé dans les processus viraux et cellulaires ?
Sadzot-Delvaux, Catherine ULg

Scientific conference (2014, May 20)

Le Virus de la Varicelle et du zona (VZV) est un herpesvirus humain qui code pour 70 protéines parmi lesquelles 2 protéines kinases: ORF66p et ORF47p. La ser/thr kinase ORF47p, homologue de UL13 d’HSV ... [more ▼]

Le Virus de la Varicelle et du zona (VZV) est un herpesvirus humain qui code pour 70 protéines parmi lesquelles 2 protéines kinases: ORF66p et ORF47p. La ser/thr kinase ORF47p, homologue de UL13 d’HSV, est conservée parmi tous les Herpesvirus et fait donc partie des “Conserved Herpesvirus encoded Protein Kinases” (CHPKs). La kinase ORF47p, n’est pas indispensable dans la plupart des cellules, mais elle est essentielle dans les cellules différenciées telles que la peau, les cellules T ou des cellules dendritiques. Elle a été montrée capable de s’autophosphoryler et de phosphoryler des protéines virales, en particulier ORF9p, IE62, IE63, et gE, régulant ainsi les différentes étapes du cycle infectieux. En outre, lors de l’infection par VZV, la protéine IRF3 (Interferon Responding Factor 3), facteur de transcription régulant de la réponse immunitaire innée antivirale apparaît phosphorylée de manière ORF47p-dépendante, empêchant ainsi la mise en place d’une réponse innée efficace. ORF47p apparaît donc comme une kinase capable de moduler à la fois des processus viraux et des processus cellulaires qu’il reste néanmoins à identifier et à caractériser. [less ▲]

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See detailLa reconstruction du système d’éducation en contexte post-conflit armé au Kosovo - La survivance des dispositions développées par la Minuk pour favoriser le vivre ensemble par l’éducation primaire
Pierre, Alexia ULg

Conference (2014, May 20)

Le contexte international des années 1990 a permis que certaines prérogatives considérées comme d’un ressort national deviennent des préoccupations internationales, entraînant des positionnements de la ... [more ▼]

Le contexte international des années 1990 a permis que certaines prérogatives considérées comme d’un ressort national deviennent des préoccupations internationales, entraînant des positionnements de la Communauté internationale. C’est le cas de l’éducation. D’abord identifiée comme facteur du développement économique et social, l’éducation est peu à peu vue comme un outil de prévention des conflits armés et des violations massives du droit international humanitaire, de par sa capacité à intervenir dans la construction précoce du vivre ensemble. L’exemple du Kosovo permet d’explorer la reconstruction par la Communauté internationale, à travers la Minuk, d’un système éducatif en contexte post-conflit armé non international. Cette étude vise à appréhender la survivance actuelle, dans les écoles primaires de la capitale kosovare Prishtina, des dispositions développées par la Minuk pour favoriser le vivre ensemble par l’éducation en reflet des positionnements internationaux. En avril 2012, une recherche menée dans les écoles de Prishtina, par le biais de questionnaires et auprès d’acteurs du système éducatif actuel du Kosovo rencontrés en entretiens, a permis d’obtenir des éléments de réponse sur l’insertion et la traduction des positionnements internationaux sur l’éducation dans le cadre normatif et législatif kosovar lié à l’éducation primaire, ainsi que sur la survivance et la forme actuelle de ces dispositions dans les écoles primaires de la capitale. Il apparait à travers cette recherche exploratoire, dont l’objectif est d’obtenir une image de la traduction des dispositions internationales en matière d’éducation post-conflit interne dans les écoles primaires de Prishtina, que si la structure nécessaire à la dispense de ce type d’éducation a été massivement appliquée aux écoles de Prishtina, les limites inhérentes au terrain ne leur permettent pas un développement suffisamment rapide pour une bonne adaptation à cette structure et son développement correct. [less ▲]

Detailed reference viewed: 22 (6 ULg)
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See detailCycle de conférences relatives aux méthodes et innovations pédagogiques en enseignement supérieur
Hanzen, Christian ULg

Scientific conference (2014, May 20)

Ce cycle de conférences a pour but de sensibiliser les enseignants aux méthodes et moyens disponibles pour construire et évaluer une activité d’enseignement. 1. Qui suis-je 2. Les étudiants, quels ... [more ▼]

Ce cycle de conférences a pour but de sensibiliser les enseignants aux méthodes et moyens disponibles pour construire et évaluer une activité d’enseignement. 1. Qui suis-je 2. Les étudiants, quels étudiants 3. Les objectifs de formation 4. L’approche par compétences 5. L’apprentissage au raisonnement clinique 6. Les cartes conceptuelles 7. Comment saloper une présentation Power Point 8. Les boitiers de vote électronique 9. Les questions à choix multiples et les degrés de certitude 10. Le cycle de qualité d’une évaluation 11. Les class room assessments 12. Les Massive Online Open Courses [less ▲]

Detailed reference viewed: 62 (4 ULg)
See detailSynthesis of degradable polyphosphoester copolymers for templating calcium carbonate drug delivery carriers
Ergül, Zeynep ULg; Debuigne, Antoine ULg; Calvignac, Brice et al

Poster (2014, May 20)

The design of drug delivery systems (DDS) often requires biodegradable and biocompatible materials that allow safe retention and controlled release of the drug. In this respect, CaCO3 particles are ... [more ▼]

The design of drug delivery systems (DDS) often requires biodegradable and biocompatible materials that allow safe retention and controlled release of the drug. In this respect, CaCO3 particles are appropriate drug carriers that have excellent properties such as low density, high specific surface areas and porosity for drugs and proteins encapsulation. Here, hyaluronic acid usually used for templating CaCO3 particles was substituted by a degradable synthetic copolymer based on PPE. The latter is a promising candidate due to its biocompatibility, biodegradability and the low toxicity of its degradation products such as phosphates. We also introduced acid functions on the PPE segment in order to enhance its calcium affinity and ability to tune the morphology of the CaCO3 particles. The butynyl phospholane (BYP) polymerization was initiated from poly(ethylene oxide) PEO-OH by organocatalyzed ring opening polymerization (ROP) [2] followed by UV catalyzed thiol-yne addition of 3-mercaptopropionoic acid onto the alkyne functions. CaCO3 particles were then generated in the presence of the copolymer following a procedure inspired from . Well-defined PPE copolymers bearing pendant alkynyl groups, i.e. PEO-b-PBYP (Ð <1.1), were obtained by organocatalyzed ROP of BYP initiated at 0°C from PEO-OH (Scheme 1). The copolymer was then reacted under UV with 3-mercaptopropionoic acid in order to introduce carboxylic acid functions along the PPE backbone by thiol-yne reaction. NMR analyses confirmed that full functionalization was reached after 2h. The high density of acid moieties in PEO-b-PBYP(COO-)2 is supposed to facilitate the Ca2+ complexation. The solution behavior and self-assembly of PEO-b-PBYP(COO-)2 in water was investigated by DLS with and without Ca+2 at different pH. Finally, stoichiometric amounts of CaCl2 and Na2CO3 were mixed in water containing the PEO-b-PBYP(COO-)2 which strongly influences the size of the CaCO3 particles (~1.5 µm). The acid-bearing PPE-based copolymers were successfully prepared and used as templating agents for the synthesis of CaCO3 particles. [less ▲]

Detailed reference viewed: 12 (6 ULg)
See detailChemical fixation of CO2 with epoxides: towards the synthesis of cyclic carbonates, precursors of CO2-based polyurethanes
Gennen, Sandro ULg; Grignard, Bruno ULg; Gilbert, Bernard ULg et al

Poster (2014, May 20)

Due to concerns about global warming combined with the decrease of fossil resources, the chemical transformation of carbon dioxide into added-value products has gained interest in both academic and ... [more ▼]

Due to concerns about global warming combined with the decrease of fossil resources, the chemical transformation of carbon dioxide into added-value products has gained interest in both academic and industrial fields. To date, the chemical fixation of CO2 onto epoxides is one of the most promising ways to valorize carbon dioxide at an industrial scale . Indeed, cyclic carbonates are useful intermediates for polycarbonates and polyurethanes synthesis or can be used as electrolytes in lithium ion batteries. Although fixation of carbon dioxide onto epoxides has been extensively studied, the design of highly effective catalysts still remains a challenge. Here, we present a new highly efficient biocomponent organocatalyst based on the use of an ammonium salt (TBAI) in combination with single or double hydrogen bond donors activators (typically fluorinated alcohols). [less ▲]

Detailed reference viewed: 14 (4 ULg)
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See detailHumanisme de conviction ou humanisme instrumental ? Une comparaison des directeurs de prison belges et français
Dubois, Christophe ULg; Mouhanna, Christian

Conference (2014, May 20)

Bien que peu étudiés, les directeurs de prison se situent au centre de l’institution pénitentiaire et font office de véritables interfaces entre les politiques étatiques et les pratiques locales. L’étude ... [more ▼]

Bien que peu étudiés, les directeurs de prison se situent au centre de l’institution pénitentiaire et font office de véritables interfaces entre les politiques étatiques et les pratiques locales. L’étude empiriquement ancrée des pratiques de ce groupe professionnel révèle divers modes de prise en compte de la question humaniste par les acteurs d’un « système pénitentiaire » souvent considéré comme dominé par « l’impératif sécuritaire ». Quant à l’analyse de leurs discours, elle permet de rendre compte du positionnement particulier de nombreux directeurs de prison vis-à-vis de leur administration (collectivement, via les syndicats et associations de directeurs, ou individuellement, via les médias et autres publications) et vis-à-vis de l’institution judiciaire (juges d’instruction, tribunaux de l’application des peines, Conseil d’Etat). Notre contribution repose sur deux enquêtes réalisées au cours des trois dernières années auprès de directeurs belges (n = 32) et français (n = 20). Les degrés de hiérarchisation et de judiciarisation des contextes de travail des directeurs varient au sein des ces deux pays et déterminent, en partie, les modalités d’interaction quotidienne des directeurs en détention (avec les détenus, les services psychosociaux, les surveillants, etc.) et autour de la détention (avec l’administration centrale, le TAP, la justice, les associations diverses, etc.). Il s’agira de saisir et de rendre visible la dimension humaniste du travail des directeurs, tant au niveau de leurs pratiques (cultures professionnelle et organisationnelle) que de leurs discours professionnels (logiques de justification). En effet, ce qu’ils qualifient, par exemple, d’ « empathie », d’ « intensité des relations », de « recherche du sens de leur travail » et de « sens de la peine », semblent orienter leur travail dans des marges qu’il conviendra de préciser. [less ▲]

Detailed reference viewed: 21 (1 ULg)
See detailElectrografting of polythiophenes on zinc oxide nanorods for photovoltaic cells
Demarteau, Jérémy ULg; Ouhib, Farid ULg; Henrist, Catherine ULg et al

Poster (2014, May 20)

As the rarefaction of fossil energies, photovoltaic cells are certainly amongst the most important energy sources for the future. Our work concentrated on hybrid photovoltaic cells that are based on ... [more ▼]

As the rarefaction of fossil energies, photovoltaic cells are certainly amongst the most important energy sources for the future. Our work concentrated on hybrid photovoltaic cells that are based on organic (polythiophene) and inorganic components (ZnO nanorods). The technology that maximizes the contact area between the two semi-conductor n and p while maintaining two separate components is the interdigital configuration. As the inorganic part, perfectly well aligned zinc oxide (ZnO) 1D nanostructures have been synthesized by hydrothermal growth on ZnO-seeded FTO substrates. SEM, AFM and XRD characterizations evidence patterned well- aligned nanorods with high c-axis, their roughness of surface and the length of their nanostructure. Concerning the organic component, we synthetize polythiophenes based diblock copolymer with high degree of regioregularity and predetermined molecular weight using Grignard Methatis (GRIM) process. Diblock polythiophene based copolymers are of interest because of the possibility of generating multifunctional materials (by associating the specific properties of each block), including their ability for self-assembly into well-defined nanostructures (fibrils or micelles) with controllable dimensions. Poly(3-hexylthiophene) (P3HT) composes the first block and the second block is either a polythiophene bearing an acrylate group on each monomer unit (PAcET), or a polythiophene bearing both acrylate and poly(ethylene glycol) side chains (P(AcET-co-PEGET)). Typically, the acrylates are used to fixe in a covalent way the copolymer to ZnO nanorods, while the PEG grafts are necessary for the solubilisation of the copolymer in the electrografting medium. 1H NMR and DLS characterizations allow us to find the backbone and the micellar structure of the copolymer. Cathodic polarization (electrografting) of ZnO nanorods induces electropolymerization of acrylate groups, leading to an adherent organized film of poly(thiophene)-based micelles. During the illumination tests, we obtained a typical response of a photovoltaic despite the low yields. This promising synthetic route opens exciting perspectives for the production and the electrochemical functionalization of different lengths of ZnO nanowires, which seems to be promising candidate for hybrids photovoltaic cells. [less ▲]

Detailed reference viewed: 17 (2 ULg)
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See detailModeling of a glass mineral wool process in view of Life Cycle Analysis
Gerbinet, Saïcha ULg; Léonard, Angélique ULg; Briard, Vincent

Conference (2014, May 20)

In line with the growing concern about the environmental impact of materials in the building sector, Knauf Insulation, a glass wool producer, is performing environmental impact assessment of its products ... [more ▼]

In line with the growing concern about the environmental impact of materials in the building sector, Knauf Insulation, a glass wool producer, is performing environmental impact assessment of its products through LCA. Knauf Insulation has several glass wool factories in Europe that produce various products, and for a specific market, the same product can be produced in several factories. As the plants that produce glass wool work with similar pathways, a generic model for LCA usable for every plant and every glass wool product has been designed. The general principle of glass wool production is the following: the raw materials, sand, limestone, soda ash, borax, sodium carbonate, as well as recycled off-cuts from the production process, are weighed and mixed. Knauf Insulation also uses a large amount of recycled glass (cullet). The mix is sent to a furnace at high temperature (1350°C). The melted material is then fiberized and the binder is added, a process called forming. Knauf Insulation uses a special binder with ECOSE Technology, a new and formaldehyde-free binder. The wool fibers are collected, by suction, on a conveyor belt, and the mattress then goes through the curing oven. For some products a facing is added. Finally the product is compressed and packed. Specific attention is put in certain LCA aspects, such as allocations procedures, and we have used ISO 14040 and 14044 along with the ILCD handbook as guides dur-ing the model development. LCA is performed from raw materials extraction to end-of-life. Nevertheless, the impacts of the insulation system use phase are not included, as they strongly depend on parameters such as construction systems, etc. The functional unit is defined as 1 m3 of specific glass mineral wool product. The model, implemented in GaBi 6, is made as generic as possible by including, for each step, all the raw materials that can be used in one of the factories as well as all the energy sources. Parameters allow to define the amount of each raw material consumed, therefore the model can be adapted to any factory simply by setting these parameters accordingly. Moreover, the transport distances are also parameters and the origin of the energies (electricity or heat) can also be selected. This simplifies the data collection, since the template is the same for all the factories, it can be supported by data collection tools already existing. A part of the model is dedicated to weighting between factories, so a combination of factories can also be studied. This allows to study products sold on a specific market. The model can also be adapted to almost all Knauf Insulation products by using parameters where necessary: for example, several products have different binder contents, so a parameter defines the amount of binder. As some materials can be recycled between several parts of the process, special attention has been paid to recycling loops inside the model. The model is flexible enough to be used for Environmental Product Declaration (EPD) as well as for Eco-Design purposes. [less ▲]

Detailed reference viewed: 17 (5 ULg)
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Peer Reviewed
See detailPostmortem Measurement of Cadaveric VOCs in Human Internal Cavity Gases
Stefanuto, Pierre-Hugues ULg; Varlet, V; Grabherr, S et al

Conference (2014, May 20)

Detailed reference viewed: 12 (0 ULg)
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See detailEffects of wheat/oilseed rape and wheat/pea associations on the diversity of aphids and aphidophagous beneficials
Chevalier Mendes Lopes, Thomas ULg; Bosquée, Emilie ULg; Honba, David et al

Poster (2014, May 20)

This study was conducted in the Shandong province (China) to better characterize the effect of wheat/oilseed rape and wheat/pea associations on the populations of aphids and aphidophagous beneficials. At ... [more ▼]

This study was conducted in the Shandong province (China) to better characterize the effect of wheat/oilseed rape and wheat/pea associations on the populations of aphids and aphidophagous beneficials. At specific times of the season, the observations on wheat tillers confirm the resource concentration and the enemy hypotheses. In fact, aphids were more abundant in the pure stand of wheat, while more ladybirds were observed in the associations. As for the trapping of aphidophagous beneficials, the parasitoid species Aphidius gifuensis (Ashmead) was prevalent. Among predators, Propylea japonica (Thunberg) and Harmonia axyridis (Pallas) were the most abundant species. Few lacewings and hoverflies were trapped. This study shows a beneficial effect of crop associations on the control of aphid populations. [less ▲]

Detailed reference viewed: 19 (3 ULg)
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See detailEvaluation of the aphid and aphidophagous beneficials diversity in a pea and potato association
Bosquée, Emilie ULg; Chevalier Mendes Lopes, Thomas ULg; Serteyn, Laurent et al

Poster (2014, May 20)

Crop associations can have beneficial effects on the control of insect pests. This study was conducted in the Shandong province (China) to assess the impact of potatoes and peas association on the ... [more ▼]

Crop associations can have beneficial effects on the control of insect pests. This study was conducted in the Shandong province (China) to assess the impact of potatoes and peas association on the populations of aphids and aphidophagous beneficials. Observations on potato plants and trapping were performed. During the season, the degree of infestation didn’t differ significantly between the association and the pure stand. However, the aphidophagous beneficials were more abundant in the association comparing to the pure stand. Trapping results give a more general idea about the richness and diversity of natural enemies present in the environment. Aphidius gifuensis (Ashmead) and Aphelinus abdominalis Dalman are the most abundant parasitoids. Among predators, Propylea japonica (Thunberg) and Harmonia axyridis (Pallas) are prevalent. Few hoverflies and lacewings were trapped. Results from the observations on plants do not support the resource concentration hypothesis. However, the enemy hypothesis was confirmed for the aphidophagous beneficials. Therefore, this association can have a beneficial effect on the control of aphid populations. [less ▲]

Detailed reference viewed: 15 (3 ULg)
See detailDo Board Characteristics Affect Information Asymmetry?
Sougné, Danielle ULg; Ajina, Aymen ULg

Scientific conference (2014, May 19)

Detailed reference viewed: 32 (7 ULg)