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See detailMulti-allergens detection by flow cytometric immunoassay
Otto; Planque; Lamote et al

Poster (2015, November)

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See detailImproving laboratory diagnostic capacity of epizootic diseases in Belgium
Cargnel, Mickaël ULg; Roelandt, Sophie; Van der Stede, Yves et al

Poster (2015, October 30)

Belgium and other European neighbouring countries faced several emerging and re-emerging diseases as well as zoonotic diseases over the last decade. However, it has been noticed that during these episodes ... [more ▼]

Belgium and other European neighbouring countries faced several emerging and re-emerging diseases as well as zoonotic diseases over the last decade. However, it has been noticed that during these episodes, the laboratory diagnostic capabilities were surpassed, which led to an increase in the time required for the control and the eradication of these diseases. Belgium is a European hub and can be affected by these diseases which can via different paths e.g. trade of live animals or animal products from around the world or via wildlife. It is therefore crucial to react rapidly to these diseases, to establish contingency plans and to develop appropriate diagnostic tests. Moreover, there are only few publications looking at the issues of increased diagnostic capacities for epizootic diseases based on [less ▲]

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See detailIn vitro and in vivo evaluation of an optimized fenofibrate lipid based solid dispersion produced by a PGSS process
Pestieau, Aude ULg; Lebrun, Sonia; Cahay, Bernard et al

Poster (2015, October 28)

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See detailDynamics of Internalization and Recycling of the pro-Metastatic Membrane Type 4-Matrix Metalloproteinase (MT4-MMP) in Breast Cancer cells
Truong, Alice ULg; Yip, Cassandre ULg; PAYE, Alexandra ULg et al

Poster (2015, October 26)

MT4-MMP (MMP17) is a glycosyl-phosphatidyl inositol-anchored membrane-type matrix metalloproteinase expressed at the cell surface of human breast cancer cells. In triple negative breast cancer, MT4-MMP ... [more ▼]

MT4-MMP (MMP17) is a glycosyl-phosphatidyl inositol-anchored membrane-type matrix metalloproteinase expressed at the cell surface of human breast cancer cells. In triple negative breast cancer, MT4-MMP promotes primary tumor growth and lung metastases. Recently, we demonstrated that EGFR activation and signaling are enhanced by MT4-MMP in a non-proteolytic dependent manner. While trafficking and internalization of EGFR was extensively investigated, little is known about MT4-MMP. Here, we investigated the dimerization, internalization and recycling dynamics of MT4-MMP and its mutated inactive form MT4-MMP-E249A. We demonstrate that MT4-MMP forms dimers and oligomers at the cell surface, a process that was not inhibited neither by broad-spectrum MMP inhibitors (GM6001 and BB94) nor TIMP-2. MT4-MMP is internalized in early endosomes from 10 minutes to 60 minutes. Once internalized, some amount of MT4-MMP is auto-degraded, whereas its inert form E249A was found intact. Large part of the internalized enzyme was recycled intact at the cell surface. By exploring its endocytosis, we found that MT4-MMP is internalized by the CLIC/GEEC pathway, a mechanism that differs from other MT-MMP members. Overall, we provided a new mechanistic insight on the regulatory mechanisms of MT4-MMP in human breast cancer cells. We also, highlighted unique features of MT4-MMP among membrane-associated MMPs, which may be useful for the design of novel therapeutic strategies for metastatic breast cancer. [less ▲]

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See detailEvaluation isocinétique de la fatigabilité musculaire du genou: qu'en est-il de la reproductibilité intra-dynamomètre et de la compatibilité inter-dynamomètre?
Paulus, Julien ULg; Krecke, Roland; Bosquet, Laurent et al

Poster (2015, October 26)

Abstract Certains aspects de l'isocinétisme, bien que considéré comme un gold standard de l'évaluation musculaire [1], restent à explorer: entre autre la reproductibilité intra-dynamomètre des index de ... [more ▼]

Abstract Certains aspects de l'isocinétisme, bien que considéré comme un gold standard de l'évaluation musculaire [1], restent à explorer: entre autre la reproductibilité intra-dynamomètre des index de fatigue (quotient des n dernières répétitions par les x premières par exemple) et des paramètres mesurés lors d'une épreuve de fatigabilité musculaire pour le genou mais également la compatibilité inter-dynamomètre de cette même épreuve de résistance à la fatigue. Après étude via à un test-retest, la reproductibilité des index de fatigue semble très insuffisante pour une utilisation clinique ou scientifique, au contraire des paramètres mesurés. De plus, après exploration via la réalisation du protocole sur trois modèles différents, il apparait que la reproductibilité insuffisante des fléchisseurs du genou ne permettrait pas de comparer les résultats obtenus sur différents dynamomètres. Introduction Les tests isocinétiques contribuent largement à l'évaluation de la performance musculaire et en sont considérés comme un gold standard [1]. Les tests de fatigabilité peuvent s'avérer complémentaires des épreuves courtes de force notamment pour évaluer un athlète sollicitant particulièrement la filière anaérobie lactique ou dans des contextes pathologiques spécifiques [2]. Bien que Bosquet et al. [3] aient démontré la reproductibilité d'un protocole de fatigabilité pour le genou, 30 flexions-extensions maximales à 180°.s-1 avec une amplitude de 100°, à notre connaissance, aucune étude, ayant pour objectif d'être exhaustive dans son analyse, n'a été menée sur la reproductibilité des paramètres mesurés (meilleure répétition, cumuls total et partiels) et index de fatigue (quotient des n dernières répétitions par les x premières, du cumul des répétitions par la meilleure,…) bien qu'ils soient proposés directement par les dynamomètres et/ou utilisés en clinique et dans la littérature lors de l'étude de la fatigabilité du genou [4]. Sont-ils suffisamment reproductibles pour que leur utilisation soit scientifiquement validée? La compatibilité des résultats d'une épreuve de fatigabilité du genou entre différents dynamomètres isocinétiques n'a également, à notre connaissance, pas été évaluée récemment, qui plus est sur plus de deux dynamomètres de marques différentes [5]. Est-il envisageable de comparer les résultats obtenus sur des dynamomètres de marques différentes et de généraliser les normes? Méthodes Pour tenter d'apporter un élément de réponse à la première question, dix-huit hommes sains, modérément actifs, ont réalisé trente extensions-flexions maximales du genou à trois occasions sur un Biodex System 3 Pro, en observant sept à dix jours de repos entre chaque session. Afin de compiler onze paramètres mesurés et de construire quarante-quatre index, le moment de force maximum (MFM) et le travail maximal (Wmax) de chaque répétition ont été enregistrés. La reproductibilité de chaque paramètre et index a été évaluée via leur ICC (2,1), SEM et MD respectifs. Pour évaluer la compatibilité inter-dynamomètre du Biodex System 3 Pro, du Con-Trex MJ PM-2 et du Cybex Humac CSMI, vingt-et-un sujets sains, modérément actifs, ont réalisé trente extensions-flexions maximales du genou à trois occasions, en observant six à dix jours de repos entre chaque session. Le MFM et le Wmax de chaque répétition ont été enregistrés. La compatibilité inter-dynamomètre deux-à-deux a été évaluée à l'aide des ICC (3,1), SEM et MD des paramètres mesurés.   Résultats En ce qui concerne la reproductibilité intra-dynamomètre, les valeurs d'ICC des paramètres mesurés pour les extenseurs du genou sont quasi-systématiquement supérieures à 0.8 tandis que celles pour les fléchisseurs oscillent entre 0.7 et 0.8. Les index de fatigue présentent quant à eux des ICC inférieurs à 0.7 et 0.5 respectivement pour les extenseurs et fléchisseurs. Les valeurs d'ICC ne diffèrent guère entre le MFM et le Wmax (que ce soit pour les extenseurs ou les fléchisseurs ou pour les paramètres mesurés et les index de fatigue). Pour le volet compatibilité inter-dynamomètre, les ICC des paramètres mesurés lors de l'épreuve de fatigabilité musculaire des extenseurs du genou sont très majoritairement supérieurs à 0.8, quelle que soit la paire de dynamomètres considérée. A contrario, les ICC de ces mêmes paramètres mesurés sont presque tous inférieurs à 0.7 pour les fléchisseurs. Les valeurs d'ICC ne diffèrent guère entre le MFM et le Wmax (que ce soit pour les extenseurs ou les fléchisseurs). Logiquement, la compatibilité inter-dynamométrique des index de fatigue n'a pas été étudiée puisque leur reproductibilité intra-dynamomètre a été démontrée comme insuffisante dans la première partie de notre étude. Discussion Considérant qu'un ICC supérieur à 0.8 soit acceptable pour une utilisation clinique [6], nous pouvons conclure que, compte tenu des valeurs obtenues sur notre population, aucun index de fatigue, bien que séduisant compte tenu de leur capacité théorique à caractériser la décroissance de la performance lors d'une épreuve de fatigabilité, ne semble présenter une reproductibilité intra-dynamométrique suffisante pour une utilisation clinique ou de recherche. Seuls les paramètres mesurés tels que la meilleure répétition, les cumuls total ou partiels apparaissent utilisables, en clinique et dans un contexte de recherche, en raison d'une reproductibilité intra-dynamométrique qui peut être qualifiée de (très) haute voire excellente [7, 8]. Des index de fatigue sont donc fréquemment utilisés alors que leur reproductibilité semble très largement insuffisante. La reproductibilité inter-dynamomètre des paramètres mesurés du protocole de fatigue défini par Bosquet et al. [3] permet leur utilisation clinique pour les extenseurs du genou mais est très insuffisante pour les fléchisseurs. Il apparaît donc nécessaire de réaliser les tests à chaque reprise sur le même dynamomètre dans le cadre de suivis longitudinaux ou des comparaisons transversales impliquant les fléchisseurs du genou. Ce manque de compatibilité inter-dynamomètre implique également que les normes soient spécifiques à chaque modèle de dynamomètre isocinétique. Conclusion Nos résultats indiquent que les index de fatigue ne peuvent être utilisés que ce soit dans un contexte clinique ou de recherche pour l'évaluation isocinétique du genou. Seuls les paramètres mesurés sont suffisamment reproductibles pour être employés. Le manque de compatibilité inter-dynamomètre pour les fléchisseurs du genou impliquent d'utiliser le même dynamomètre isocinétique lors de suivis longitudinaux ou de comparaisons transversales. [less ▲]

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See detailProduction of alumina foundry moulds by additive manufacturing for low and high melting points alloys prototypes
Bister, Geoffroy; Deschuyteneer, Dorian; Hautcoeur, Dominique et al

Poster (2015, October 26)

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See detailCommunity based participatory research about the multiculturality of second generation migrants after 50 years of Moroccan and Turkish immigration . 50-50 : The “ elli – khemsin ” project
Tatli, Hülya; Laurent, Geoffroy; Henry, Anne Pascal et al

Poster (2015, October 23)

Key words : Family Practice / Community-Based Participatory Research / Intergenerational Relations / loyalty conflict Introduction “Would you consider yourself more Turkish or more Belgian”? To make a ... [more ▼]

Key words : Family Practice / Community-Based Participatory Research / Intergenerational Relations / loyalty conflict Introduction “Would you consider yourself more Turkish or more Belgian”? To make a choice between Belgium and Turkey is like making one between my mother and my father claims a Belgian-Turkish teenager. That reveals the deep feeling of the descendants of the Moroccan or Turkish immigration in Belgium we commemorate the 50th anniversary this year. When two objects of desire are in contradiction with each other, that may give rise to a loyalty conflict. And that is exactly what we are interested in: the loyalty feeling between parental culture and the one of the native country. This project aims to take interest in the fruits of the immigration and more particularly in the teenagers born of immigrant parents in Belgium by the realization of a video by whom it concerns first, with the help of professionals. How do these teenagers daily manage this far-out situation? The aim of this project is to illustrate these silent questionings. The realized video will be broadcasted in schools to allow other teenagers to identify with the characters and to open up the debate. Methods The non-profit association ETMS (Private health center Espace Temps) has signed a partnership declaration with the Regional Center of Immigration of Charleroi and the non-profit association Accompaniment of Teenagers in Open Custody (AJMO) to elaborate a participatory research in community health. Recruitment of participants, meetings with the teenagers, storylines writing, shooting, editing and presentation of the video to an interested audience were the following steps. Results A psychologist, a family doctor, a nurse practitioner, a cameraman, a social worker, an educator and six teenagers of Turkish, Moroccan or Algerian origin take part to the project that has lasted for one year. The video will be ready end 2015 and will allow to debate sensitive topics and the creation of a partnership with schools that are interested in using this tool for educational purposes. [less ▲]

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See detailPour une approche poétique du détournement de jeux vidéo : deux obstacles théoriques
Barnabé, Fanny ULg

Poster (2015, October 23)

Cette recherche prend pour objet les différentes formes de détournement du jeu vidéo, avec pour particularité de les étudier, non pas d’un point de vue sociologique, mais sous un angle formel. La ... [more ▼]

Cette recherche prend pour objet les différentes formes de détournement du jeu vidéo, avec pour particularité de les étudier, non pas d’un point de vue sociologique, mais sous un angle formel. La réception créative qu’est le détournement est donc abordée à travers les « traces d’usage » observables dans les œuvres produites, et ce, dans le but de mesurer et de caractériser l’écart que ces textes « au second degré » construisent par rapport à une pratique consensuelle du jeu. L’objectif final est d’ébaucher une poétique du détournement vidéoludique. [less ▲]

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See detailInternational Classification of Primary Care in a cross-lingual terminology portal (Poster)
Jamoulle, Marc ULg; Kuehlein, Thomas; Pizzanelli, Miguel et al

Poster (2015, October 23)

ICPC, reflecting the burden of family medicine, is available in the HeTOP cross-lingual terminology portal (URL: www.hetop.eu) in 19 languages, mostly European (e.g. Spanish, Portuguese) but also in ... [more ▼]

ICPC, reflecting the burden of family medicine, is available in the HeTOP cross-lingual terminology portal (URL: www.hetop.eu) in 19 languages, mostly European (e.g. Spanish, Portuguese) but also in Japanese or Mandarin. The HeTOP interface has been also translated in 10 languages by Wonca colleagues (including in Turkish, Vietnamese and Romanian). [less ▲]

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See detailConcept identification and context analysis of the Wonca Europe 2015 book by instance-based categorization of general practice activities
Jamoulle, Marc ULg; Steylaert, Carl

Poster (2015, October 22)

Context: Family physicians are large producers of knowledge. The site of Wonca Europe provides access to almost 20,000 abstracts produced by family physicians since 1995 (from Europe) and 1998 (from World ... [more ▼]

Context: Family physicians are large producers of knowledge. The site of Wonca Europe provides access to almost 20,000 abstracts produced by family physicians since 1995 (from Europe) and 1998 (from World Conferences). On the occasion of 20 years of Wonca Europe, an editorial committee selected 100 of the best abstracts and has asked each author (or a substitute) to make a chapter for the Wonca Book published in 2015 at the Wonca Europe congress. The content analysis of medical texts is generally achieved by the use of MeSH. To fill gaps in MeSH, a specific family medicine classification has been developed under the name Core Content Classification of General Practice / Family Medicine (3CGP). A combination of ICPC + Q-Codes (new tool for non-clinical items) provides just fewer than 900 concepts for analyzing the contents of specific texts to family medicine. Method: The 100 chapters of the Wonca Book 2015 were analyzed using 3CGP by a single observer not involved in the editorial committee of the book. Every text has been carefully read and a maximum of two concepts by chapter were reported in an Excel spreadsheet. Result: 150 codes were used of which 143 from the classification of non-clinical items Q-codes and 7 coming from ICPC. Among the topics discussed by 143 authors and identified by Q-codes, 35 relate to knowledge management which includes family medicine education, 29 codes concern research and development, 29 doctor's specific area, 24 patients’ issues, 11 relate to the structure and 8 deal with ethics. Discussion: Despite limitations (unique observer – not validated tools) the study reveals striking facts. It is noted that the editorial board has favored themes that affect the structure and organization of knowledge of the profession. Clinical items or affecting directly the patients are very poorly represented. More about 3CGP on http://docpatient.net/3CGP The chapter of the book are also used as source of knowledge in the Q-Codes content study (ongoing) available on www.hetop.eu (inscription needed) [less ▲]

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See detailSetting up an eddy covariance system to measure N2O fluxes exchanged by a production crop - First steps
Lognoul, Margaux ULg; SALERNO, Giovanni ULg; Debacq, Alain ULg et al

Poster (2015, October 20)

In order to study N2O exchanges by a Belgian production crop, we installed an eddy covariance system at the Terrestrial Observatory of Lonzée (Belgium), using a H2O and N2O quantum cascade laser analyzer ... [more ▼]

In order to study N2O exchanges by a Belgian production crop, we installed an eddy covariance system at the Terrestrial Observatory of Lonzée (Belgium), using a H2O and N2O quantum cascade laser analyzer and a sonic anemometer. We obtained three days of measurements and were able to investigate data preprocessing and flux calculation. We observed a drifting time-lag between the analyzer and the anemometers time series, presumably caused by an internal clock drift. Time-lag determination (using the covariance function maximum method) was more difficult for N2O than H2O, suggesting that this routine should be adapted to gas characterized by low fluxes. We investigated high frequency loss and found a system cut-off frequency of 0.5Hz for H2O, comparing its cospectrum to sensible heat cospectrum. We were not able to retrieve a neat cospectrum for N2O because of low fluxes during turbulent conditions. Further work and more data will be needed in order to bring answers to pending questions. [less ▲]

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See detailQuantification of somatic calcium currents in midbrain dopaminergic neurons
Philippart, Fabian ULg

Poster (2015, October 19)

Dopaminergic neurons (DA) within the substantia nigra pars compacta (SNc) and ventral tegmantal area (VTA) are autonomous pacemakers. SNc DA neurons are particularly prone to degeneration in Parkinson’s ... [more ▼]

Dopaminergic neurons (DA) within the substantia nigra pars compacta (SNc) and ventral tegmantal area (VTA) are autonomous pacemakers. SNc DA neurons are particularly prone to degeneration in Parkinson’s disease (PD). However, the cause for their high vulnerability to degeneration, compared to the neighboring, more resistant VTA DA neurons, remains unclear. It has been suggested that the pacemaking in SNc DA neurons relies on L-type calcium channels. A large calcium entry through these channels could cause oxidative stress in SNc DA neurons and could explain their vulnerability. We directly tested this hypothesis in young rats by quantifying the density of L-type calcium channels in the soma of DA neurons using nucleated patch-clamp recordings. Our results show measurable L-type (sensitive to 5µM nifedipine) and non L-type calcium currents in the soma of SNc and VTA DA neurons. We found that the amplitude of the nifedipine-sensitive current is higher in SNc DA neurons (17.8±1.6 pA/pF; n=10) than in VTA DA neurons (11.2±1.8 pA/pF; n=10). Interestingly, we noticed that the L-type current is the predominant Ca2+ current in SNc DA neurons (44%) while this is not the case in VTA DA neurons (22%). These results were confirmed by non-stationary-fluctuation analysis (NSFA). These experiments revealed a higher mean number of nifedipine-sensitive Ca2+ channels in the soma of the SNc DA neurons (502±74; n=6) than in VTA DA neurons (160±45; n=6). The greater density of L-type channels in the soma of SNc DA neurons could contribute to their vulnerability in human PD patients. [less ▲]

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See detailÉtude du corps-pour-autrui dans l'anorexie mentale
Minguet, Eugénie; Englebert, Jérôme ULg

Poster (2015, October 16)

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See detailGoat breeding in the rural district of Chemini (Algeria)
Moula, Nassim ULg; Farnir, Frédéric ULg; Leroy, Pascal ULg et al

Poster (2015, October 16)

The Kabyle goat breed represents 10.52% of the total Algerian market (3.8 million heads). A survey of 69 farmers has been carried out in order to characterize it and its breeding in the District of ... [more ▼]

The Kabyle goat breed represents 10.52% of the total Algerian market (3.8 million heads). A survey of 69 farmers has been carried out in order to characterize it and its breeding in the District of Chemini. The questions focused on household agricultural activities, including breeding of goats, cattle, sheep, rabbits, chicken, turkeys, honeybees and the production of olive oil and figs. The goat morpho-biometric characterization was based on 18 corporal measurements. The Hierarchical Cluster Analysis (HCA) of the farm structures defined four groups of farms, variance between groups accounting for 55.7% of total variability. The average number of goats in groups 1 to 4 was 7.2±2.8, 11.1±3.5, 22.3±1.4 and 3.4±1.0, respectively. Group 3 (n=6), showed the greatest number; it consists of older farmers (67 years old or over) not practicing arboriculture. They also have the largest numbers of sheep (48.67), rabbits (50.83), chicken (48.33) and turkeys (42). Group 4 (n=9), with the lowest number of goats, was the group of young farmers (39 years old or less), more dedicated to cattle breeding (~52 heads) and the production of olive oil (~207 trees) and figs (~47 trees). The 18 morpho-biometric variables were significantly higher in males than in females (p<0.05). The Kabyle goat is small (male: 68.23±0.97cm and female: 65.41±0.55cm) with long hair (male: 12.24±0.51cm, and female: 9.51±0.29cm). Its ears are drooping, its convex profile has a slightly pronounced nasal split and its dress color ranges from dark brown to black. This adapted genetic resource should be key in the development of a local production, based on a strong commitment of farmers inside a breed association, for the production of specimens corresponding to a standard, to be determined collectively. [less ▲]

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See detailLong term culture, cryopreservation and genetic modification of chicken primordial germ cells
Tonus, Céline ULg; Garcia Gil, Francisco José ULg; Cloquette, Karine et al

Poster (2015, October 16)

Avian primordial germ cells (PGCs) are precursor of gametes and appear during early stages of embryonic development. Under appropriate culture conditions, these cells can keep their germ cells properties ... [more ▼]

Avian primordial germ cells (PGCs) are precursor of gametes and appear during early stages of embryonic development. Under appropriate culture conditions, these cells can keep their germ cells properties in vitro and are foreseen as promising tools for developing efficient avian genetic engineering and preservation of germplasm. We propose original methods that allow long term expansion, efficient cryopreservation and genetic modification of primary cultures of undifferentiated PGCs. PGCs are collected from embryonic blood during their migratory period and grown in cell-culture insert in the presence of feeder cells (BRL). This physically separated co-culture system along with selective culture medium promoted emergence, selection and proliferation of PGCs lines. Forty percent of blood samples gave rise to lines originating from three commercial layer and two Belgian endangered breeds. PGCs lines were characterized for the expression of the stem cells and PGCs marker SSEA-1 by FACS. RT-PCR confirmed expression of germ-line specific markers (CVH, CDH, DAZL), pluripotency markers (cPouV, cSox2, cNanog), telomerase and CXCR4 receptor. All lines were male although isolated from pooled male and female blood samples. Two cryopreservation methods were developed based upon slow-freezing and aseptic vitrification. Both have shown a similar effectiveness in allowing storage without phenotype drift. Stably expressing lines were obtained by Lipofectamine® mediated transfection of a GFP plasmid. PGCs were subsequently injected in recipient embryos. Persistence of exogenous PGCs in the developing gonad of recipient embryos confirmed that PGCs retain their gonadal colonisation ability, both after long-term culture and after cryopreservation. [less ▲]

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See detailEvaluation de la connaissance relationnelle chez les enfants dysphasiques
Krzemien, Magali ULg; Leroy, Sandrine ULg; Maillart, Christelle ULg

Poster (2015, October 16)

La dysphasie est un trouble spécifique du développement du langage oral qui fait l’objet de nombreuses recherches mais dont certains aspects sont encore mal connus. Les théories explicatives de ce trouble ... [more ▼]

La dysphasie est un trouble spécifique du développement du langage oral qui fait l’objet de nombreuses recherches mais dont certains aspects sont encore mal connus. Les théories explicatives de ce trouble prolifèrent, notamment suite au développement de l’approche cognitivo-fonctionnelle du langage qui permet de concevoir celui-ci comme étant en interaction avec des processus généraux et non-linguistiques. En particulier, la théorie des grammaires de construction soutient que le langage s’acquiert par une abstraction progressive des formes entendues qui deviennent alors des schémas de construction. Ce mécanisme serait lié au raisonnement analogique. Or, les enfants présentant une dysphasie semblent détenir de faibles capacités de raisonnement analogique par rapport à leurs pairs de même âge. Nous nous demandons donc à quoi pourrait être dû ce déficit, en nous intéressant à un élément déterminant du raisonnement analogique : la connaissance relationnelle. Une tâche de scènes analogiques a été proposée à un groupe d’enfants présentant une dysphasie et à deux groupes contrôles, l’un apparié en âge linguistique et l’autre en mémoire de travail. Les participants devaient sélectionner l’élément détenant le même rôle relationnel qu’un élément pointé dans un dessin présenté au préalable. Les relations étaient similaires pour chaque item mais la nature des indices perceptuels variaient selon la condition : dans une condition, les indices perceptuels et relationnels concordaient, alors que dans une autre ils discordaient. Dans une troisième condition, aucune similarité perceptuelle n’était présente. Tous les enfants semblent bénéficier de la congruence entre informations perceptuelles et relationnelles. De plus, les enfants présentant une dysphasie détiennent des compétences de raisonnement analogique semblables à leurs pairs de même âge linguistique et de mêmes capacités de mémoire de travail. Ils semblent également posséder des connaissances relationnelles relativement préservées par rapport à leurs pairs de même âge mais des difficultés apparaissent quand la tâche se complexifie, notamment quand des distracteurs perceptuels doivent être inhibés. Ceci semble pouvoir être expliqué par les troubles langagiers et les déficits en mémoire de travail liés à la dysphasie. De futures études devront néanmoins écarter l’hypothèse d’une différence qualitative des représentations relationnelles entre des enfants présentant une dysphasie et d’autres ayant un développement langagier normal. [less ▲]

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See detailL’infraction sexuelle comme recherche de bonheur ?
Dziewa, Amandine; Glowacz, Fabienne ULg

Poster (2015, October 16)

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See detailÉtude des Expériences Corporelles Anormales dans la schizophrénie
Lancellotti, Elisa; Englebert, Jérôme ULg

Poster (2015, October 16)

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See detailBelgian International Lawyers and WWI. Networks, Experience and Memory
Genin, Vincent ULg

Poster (2015, October 15)

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See detailBelgian children’s and adolescents’ views on the elderly
Flamion, Allison ULg; Missotten, Pierre ULg; Schroyen, Sarah ULg et al

Poster (2015, October 15)

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See detailEnvironmental impact assessment of bio-based binders: from production to industrial applications
Gerbinet, Saïcha ULg; Belboom, Sandra ULg; Briard, Vincent et al

Poster (2015, October 15)

A binder is used to hold together the fibers forming the mineral wool products (see figure 1). These fibers can be produced from sand and recycled glass for glass wool products (see figure 2) or from rock ... [more ▼]

A binder is used to hold together the fibers forming the mineral wool products (see figure 1). These fibers can be produced from sand and recycled glass for glass wool products (see figure 2) or from rock (volcanic rock, typically basalt or dolomite) for stone wool products. Traditionally, the binders used in mineral wool products are based on phenol-formaldehyde. Due to sanitary and environmental considerations and increased focus on indoor air quality, the producers developed new alternative binders. Especially, Knauf Insulation, a worldwide building insulation manufacturer, developed a binder based on plant starch and called ECOSE. In addition of not using added phenol-formaldehyde , this new binder is also supposed to reduce the environmental impacts of Knauf Insulation mineral wools. Moreover, due to its properties, others applications are now considered for ECOSE such as composite wood panels [1]. The aim of this study is to determine the environmental impact of ECOSE and to compare it with more traditional binders using Life Cycle Assessment (LCA) methodology. LCA analyzes the environmental aspects and potential impacts associated with all the stages of a product's life. In this type of environmental assessment the energy and material flows for the entire life-cycle are surveyed and analyzed with special attention to possible environmental hazards or human health problems. The ISO 14040 and 14044 norms [2, 3] provide the general guidance for performing an LCA. The LCA methodology is first applied to ECOSE main component: glucose. The presentation will present results for glucose production from cereals starches After that, first ECOSE application, glass mineral wool products will be presented in details, including production process (see figure 3). The modelling of the glass mineral wool production process in LCA software GaBi 6 [4] is then described. One of the model specificity is that it allows to perform LCA of any glass wool products produced in Knauf Insulation plants in Europe. The adaptations to the model to allow studying former glass wool product when using phenol-formaldehyde binders will also be presented such as the advantages of this model. Moreover, preliminary results about ECOSE and phenol-formaldehyde glass wool products are explained. Références [1] Knauf Insulation. [cited 2014; Available from: http://www.knaufinsulation.ua/en. [2] ISO 14044, Environmental management - Life cycle assessment - Requirements and guidelines. 2006. [3] ISO 14040, Environmental management - Life cycle assessment - Principles and framework. 2006. [4] LBP, University of Stuttgart, and PE INTERNATIONAL AG, GaBI 6. 2012: Leinfelden-Echterdingen. p. GaBi 6: Software and database for life cycle engineering. [less ▲]

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See detailAgeism among nurses in oncology
Schroyen, Sarah ULg; Missotten, Pierre ULg; JERUSALEM, Guy ULg et al

Poster (2015, October 14)

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See detailHPLC-DAD IDENTIFICATION OF SOME FLAVONOIDS FROM THE LEAVES AND AERIAL PARTS OF BRYONIA ALBA L. SPECIES SPONTANEOUS IN THE ROMANIAN FLORA
Ielciu, Irina-Ioana ULg; Păltinean, Ramona; Cieckiewicz, Ewa ULg et al

Poster (2015, October 14)

Bryonia alba L. is a climbing species, spontaneous in the Romanian flora, which can be found throughout the whole country [1]. It is known for its cytotoxic, analgesic, antipyretic, anti-inflammatory ... [more ▼]

Bryonia alba L. is a climbing species, spontaneous in the Romanian flora, which can be found throughout the whole country [1]. It is known for its cytotoxic, analgesic, antipyretic, anti-inflammatory, antibacterial, anti-rheumatic, laxative-purgative and smooth muscle relaxant proprieties, being used both in traditional medicine and in homeopathy [2]. The main objective of this study consists in the evaluation of the flavonoid profile of this species. The vegetal material was harvested from the spontaneous flora of Cluj county (Romania). The vegetal extracts were obtained by ultrasonication, in methanol. Analysis of flavonoids was performed by a HPLC-DAD method and revealed mainly the presence of C-glycosides, of which saponarine was found as the main compound. Quantification of saponarin was also performed, using the HPLC method, on samples collected at different periods of time. Variation of the quantity of saponarine according to harvested samples was determined. Further analysis are under process in order to investigate the structure of these flavonoids and the pharmacological effects of the Bryonia alba L. plant extracts. References: 1. *** Flora Europea, vol. 2, Cambridge, Univ. Press. Cambridge London-New York Melbourne, 1979, p. 298-299 2. Demarque D, Jouanny J, Poitevin B, Saint Jean Y. Pharmacologie et matière médicale homéopathique, 3ième edition, France, CEDH, 2007. [less ▲]

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See detailControl of CXCL8/IL-8 expression by ZO-1:
Lesage, J; Suarez-Carmona, M; Grelet, S et al

Poster (2015, October 12)

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See detailPROTEKER : Mise en place d’un observatoire sous-marin côtier aux Îles Kerguelen
Saucède, T; Améziane, N; Feral, JP et al

Poster (2015, October 10)

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See detailVISA-PF: A Cross-Cultural Adaptation And Validation Of The VISA-P Questionnaire In French
Kaux, Jean-François ULg; Delvaux, François ULg; Oppong-Kyei, Julian et al

Poster (2015, October 08)

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See detailCharacterisation of TLR7/8 in equine pulmonary alveolar macrophages
Tosi, Irène ULg; Frellstedt, Linda; Pirottin, Dimitri ULg et al

Poster (2015, October 08)

Purpose of the study: In both human and equine athletes, viral infections are common causes of respiratory diseases and of a sudden deterioration of expected performances. In both species, the underlying ... [more ▼]

Purpose of the study: In both human and equine athletes, viral infections are common causes of respiratory diseases and of a sudden deterioration of expected performances. In both species, the underlying mechanisms are still unclear, and an involvement of Toll-Like Receptors (TLRs), a fundamental link between innate and adaptive immunity, has been advocated. Our objectives were to verify the presence of TLR7 and TLR8, responsible for the early anti-viral response in mammals, in equine pulmonary alveolar macrophages (PAMs) and to assess their function through specific stimulation. Methods used: Equine PAMs were collected by broncho-alveolar lavage (BAL), isolated by adherence and stimulated with specific TLR7/8 ligands (an imidazoquinoline compound and single-stranded RNA), mimicking a viral attack. The expression of TLR7/8 was evaluated by rt-PCR and the ligand-induced production of cytokines (type I-IFNs and TNF-α) was assessed via ELISA. Summary of results: Our study demonstrated the expression of TLR7/8 in equine PAMs. QPCR analyses showed a high relative expression of genes coding for TLR7 and TLR8 on equine PAM. Stimulation with specific TLR7/8 ligands resulted in significantly up-regulated production of IFN-β and TNF-α, thereby confirming that TLR7/8 are functional in equine PAMs and that they play a role in the early pulmonary antiviral response. Conclusions: This study shows that TLR7 and TLR8 are present and functional in equine PAM and that they could play a role in the early pulmonary antiviral response. In terms of future perspectives, it is interesting to suggest that the extensively demonstrated efficacy of TLR7 and TLR8 synthetic ligands in the treatment of viral diseases in human medicine could motivate the pursuit of clinical trials in the equine patient for the therapeutic management or prevention of viral respiratory infections. [less ▲]

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See detailCross-Cultural Adaptation And Validation Of The VISA-A Questionnaire In French
Kaux, Jean-François ULg; DELVAUX, François ULg; Oppong-Kyei, Julian et al

Poster (2015, October 08)

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See detailLandings profile of small-scale fisheries in Senegal: The case of the Kayar Marine Protected Area
Gueye, Ndiapaly; Diop, Mamadou; Denis, Antoine ULg et al

Poster (2015, October 08)

As marine fisheries in Senegal are in serious decline due to overexploitation, the management of sustainable fisheries requires effective tactics based on scientific data. In order to characterize the ... [more ▼]

As marine fisheries in Senegal are in serious decline due to overexploitation, the management of sustainable fisheries requires effective tactics based on scientific data. In order to characterize the current state of the artisanal fishery of the Kayar Marine Protected Area (MPA), a daily survey of fish landings was carried out between October 2013 and May 2015, and a database was created. Results showed that the landings are largely dominated by pelagic species in terms of weight. In total, 84 taxa were registered, including the species Sardinella aurita, which has been the most landed (30.5%), followed by Trichiurus lepturus (18.9%). These species are mainly captured by means of purse seine. The other types of fishing gear used in the area are the long line and the single line, which target particular species (e.g., Epinephelus aeneus). The temporal evolution of landings shows a period of abundance between May and June, while fishing effort is generally increasing. Regarding the spatial distribution, landings originate primarily from the MPA, where the landing per unit of effort was higher in the Angleterre area compared to other studied areas. These temporal and spatial variations seem to be related to the upwelling intensity which is highly seasonal, habitat features (i.e., presence of an underwater canyon in the MPA), the ecological behaviour of fish species and overexploitation. Our results confirm the need for detailed and extensive population monitoring across fish species. As a result of this study, we hope to provide the first essential information for the integrated management of fisheries in the Kayar MPA and its surrounding area. [less ▲]

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See detailApplying Stable Isotopes Bayesian Ellipses (SIBER) to characterise trophic niches of large cetaceans from the north-Western Medterranean Sea
Pinzone, Marianna ULg; Michel, Loïc ULg; Ody, Denis et al

Poster (2015, October 08)

Diet composition and feeding preferences are of critical importance to understand a species' ecology; better knowledge of these matters is necessary for efficient conservation. Few is known on the trophic ... [more ▼]

Diet composition and feeding preferences are of critical importance to understand a species' ecology; better knowledge of these matters is necessary for efficient conservation. Few is known on the trophic ecology of Mediterranean cetacean populations and the elusiveness of these organisms limits acquisition of new information. Here, we analysed C and N isotopic ratios of skin biopsies of 17 fin whales Balaenoptera physalus, 15 long-finned pilot whales Globicephala melas and 25 sperm whales Physeter macrocephalus sampled through darting between summer 2010 and 2013 in the North-Western Mediterranean Sea. We subsequently used the SIBER R package to explore isotopic niche parameters as a proxy for trophic niches assessment. Fitting of standard ellipses to each species revealed that no niche overlap between the odontocetes and fin whales was present, in accordance with the lower trophic level of the latter. Moreover, overlap between the isotopic niches of the two odontocetes was limited, confirming resource partitioning between these two species. This could be linked with differences in hunting periods and depths and consequently in prey availability. Bayesian modelling of standard ellipses revealed that the isotopic niche of fin whales was larger than the two odontocetes in over 99.80% of 106 model simulations. It is the first time that such variability is observed in Mediterranean fin whales. This suggests possible exploitation of food items from different trophic levels (krill, small fishes) or from other regions, such as other areas in the Mediterranean Sea and the North-East Atlantic. Modelling also suggested that no meaningful differences were present in the width of isotopic niches of the two odontocetes. The very narrow isotopic niche of pilot whales is in strong contrast with the generalist feeding behaviour this species is believed to have according to literature analysis. Our results open new perspectives on the ecological role of Mediterranean cetaceans. [less ▲]

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See detailDecrease of carbon tetrachloride (CCl4) over 2004-2013 as inferred from global occultation measurements with ACE-FTS
Mahieu, Emmanuel ULg; Bernath, P. F.; Boone, C. D. et al

Poster (2015, October 05)

In this contribution, we use infrared solar occultation measurements performed by the ACE-FTS (Atmospheric Chemistry Experiment – Fourier Transform Spectrometer) instrument onboard the SCISAT-1 Canadian ... [more ▼]

In this contribution, we use infrared solar occultation measurements performed by the ACE-FTS (Atmospheric Chemistry Experiment – Fourier Transform Spectrometer) instrument onboard the SCISAT-1 Canadian satellite (Bernath et al., 2005). Since its launch in August 2003, this spectrometer has been in continuous operation with no significant degradation of its performance, and global measurements are available from late February 2004 onwards, spanning now more than a decade. [less ▲]

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See detailEpistasis associated to inflammatory bowel disease (IBD) in humans
Gusareva, Elena ULg; Wei, Zhi; Traherne, J.A. et al

Poster (2015, October 05)

Gene-gene interactions underlie biochemical pathways and have been well demonstrated in model organisms. Very few examples exist on replicated epistasis in humans. Here, we performed genome-wide scans to ... [more ▼]

Gene-gene interactions underlie biochemical pathways and have been well demonstrated in model organisms. Very few examples exist on replicated epistasis in humans. Here, we performed genome-wide scans to detect epistasis associated to Crohn’s disease (CD) and ulcerative colitis (UC). We used extensive data of the IIBDGC consisting of 18277 and 14224 CD and UC patients, respectively, and ~34050 healthy controls from 15 European countries typed on the Immunochip. At first, we removed rare variants at MAF<0.05 and filtered common variants at linkage disequilibrium (LD) of r2>0.75. To limit our results to independent effects, SNPs on chromosome 6 (which contains the HLA locus), were furthermore pruned to ensure an LD of r2<0.35. We adjusted the binary traits, CD and UC, for population stratification by regressing out the first 5 principal components in R-3.0.1. The study cohorts were randomly stratified into two subgroups (referred as discovery and replication). We then performed screenings for epistatic interactions with new adjusted trait values in the two subgroups using multidimensional reduction tool MB-MDR with permutation-based (step-down MaxT) multiple testing correction and significance assessment at 0.05. We identified 14 and 6 SNP-pairs associated to CD and UC, respectively, which were concordant between the discovery and replication groups. All SNP-pairs involved concomitant variants located on the same chromosomes (for CD at 1p31.3, 5p13.1, 16q12.1 and for UC at 1p31.3, 6p21.3). A more detailed investigation of these findings, as well as the implementation of different analysis protocols, will further increase our understanding of possible epistatic mechanisms underpinning IBD. [less ▲]

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See detailLa prise en charge interdisciplinaire des patients lithiasiques réduit-elle à long terme le taux de geste urologique pour récidive ?
Castiglione, Vincent ULg; Pieroni, Laurence; Conort, Pierre et al

Poster (2015, October 01)

Certains patients lithiasiques sont hautement récidivants, malgré les progrès considérables en urologie et une prise en charge des facteurs de risque. Nous avons fait l’hypothèse qu’une prise en charge ... [more ▼]

Certains patients lithiasiques sont hautement récidivants, malgré les progrès considérables en urologie et une prise en charge des facteurs de risque. Nous avons fait l’hypothèse qu’une prise en charge interdisciplinaire au long court dédiée au diagnostic du processus lithogène, à l’analyse des causes de récidive, et à la détermination d'objectifs chiffrés de prévention, réduirait le nombre de gestes chirurgicaux pour récidive lithiasique et améliorerait ainsi la qualité de vie des patients. [less ▲]

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See detailIrrigation Development Support Program - Agricultural water management in Burkina Faso
Traoré, Farid; Wellens, Joost ULg; Tychon, Bernard ULg et al

Poster (2015, October)

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See detailStudy of the interaction between the MtgA and inhibitory compounds
Dahmane, Ismahene ULg

Poster (2015, October)

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See detailFungal biofilm reactor improves the quality of a fusion protein GLA::GFP produced by Aspergillus oryzae
Zune, Quentin ULg; Delepierre, Anissa ULg; Bauwens, Julien ULg et al

Poster (2015, October)

Fungal biofilm is known to promote the excretion of secondary metabolites, in accordance with solid-state related physiological mechanisms. In this work, the potentialities of fungal biofilm will be ... [more ▼]

Fungal biofilm is known to promote the excretion of secondary metabolites, in accordance with solid-state related physiological mechanisms. In this work, the potentialities of fungal biofilm will be investigated in the context of the production of a Gla::GFP fusion protein by Aspergillus oryzae. Since the production of this protein is under the control of the promoter glaB, specifically induced in solid-state fermentation, biofilm mode of culture is expected to enhance the global productivity. However, we found that the glaB promoter is also activated in submerged bioreactor and the fusion protein production is higher in this mode of culture. This result is related to the high shear stress leading to biomass autolysis and leakage of intracellular fusion protein into the extracellular medium. Moreover, 2D-gel electrophoresis highlights preservation of the fusion protein integrity produced in biofilm conditions whereas proteolysis strongly affects fusion protein recovery in the submerged cultures performed at high stirring rate. Fungal biofilm reactor design was then further investigated and the scale-up potentialities were evaluated. Indeed, the specific design investigated in this work involves the use of metal structured packing exhibiting a high specific area and that can be easily expanded to large-scale bioprocessing conditions. [less ▲]

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See detailUse of a HCV patients' education tool: the knowledge questionnaire with confidence degrees
Kerrad, Amel; Leclercq, Dieudonné ULg; Barreteau, H. et al

Poster (2015, October)

13 patiuent ssuffering of C hepatis have received a pretest on knowledge with confidence degrees accompanying their responses. On the basis of thes responses, they received individual education by a ... [more ▼]

13 patiuent ssuffering of C hepatis have received a pretest on knowledge with confidence degrees accompanying their responses. On the basis of thes responses, they received individual education by a pharmacist about their treatment. A post-test, again with confidence degrees, permitted to measure, according to methods described by Leclercq (2009), to evidence objective and subjective gains in knowledge as well in patients' adherence to treatment. [less ▲]

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See detailCanine idopathic pulmonary fibrosis is not associated with herpes virus infection
Roels, Elodie ULg; Dourcy, Mickael ULg; Holopainen, S. et al

Poster (2015, October)

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See detailWhere is the ancient harbour of Utica ? Geoarchaeology and palaeoenvironment of the Medjerda delta (Tunisia)
Pleuger, Elisa ULg; Abichou, Hakim; Gadhoum, Ahmed et al

Poster (2015, October)

Ancient authors mention Utica as a maritime and port city and estimate its origin around the 11th c. BC. However, in the present state of research, no archaeological evidence is earlier than the 9th c. BC ... [more ▼]

Ancient authors mention Utica as a maritime and port city and estimate its origin around the 11th c. BC. However, in the present state of research, no archaeological evidence is earlier than the 9th c. BC, and the location of the Phoenician and Roman port infrastructures remains unknown. Today, the ancient city is located on a promontory in the heart of the Medjerda delta, 10 km inland. This project proposes an interdisciplinary effort to understand the Medjerda delta landscape changes during the Holocene. It starts from an archaeological problem and proposes the contribution of geoarchaeology to the understanding of the relationship between ancient societies and their environment. The fluvial palaeoenvironments and sedimentary processes are studied through the mechanical extraction of cores (15-20 m deep) to reach the early Holocene. Selected sediment samples are then studied in laboratory, using different and complementary approaches. First results permitted to draw an hypothesis of the coastline during Antiquity and to bring out the evidence of an intense sedimentation event post 10th c. BC. The location of port infrastructures will bring initial answers to the question of the foundation of the city. The study of river palaeoenvironments of the Medjerda delta during the Holocene aim at a better understanding of the nature of the settlement, as well as the function of the city of Utica over time. This study will also assess the impact of the ancient city on the environment and understand how the city adapted to the mobility of this Mediterranean delta. Furthermore, the analysis of sedimentary processes causing the filling of the harbour basin will lead to speculation about the causes of the abandonment of the structures and more generally the decline of the city in favor of Carthage. It will also examine whether natural or anthropogenic factors have influenced this deltaic progradation over the centuries. [less ▲]

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See detailPlankton ecosystem response to the decadal variation of winter intensity in the Mediterranean Sea : a long-term study (1979-2014)
Goffart, Anne ULg; Collignon, Amandine ULg; Hecq, Jean-Henri ULg et al

Poster (2015, October)

In the Mediterranean Sea, several studies with distinct data sets indicate that the pelagic ecosystem underwent periods of change in the late 1980s and in the early 2000s. Here we used a unique long-term ... [more ▼]

In the Mediterranean Sea, several studies with distinct data sets indicate that the pelagic ecosystem underwent periods of change in the late 1980s and in the early 2000s. Here we used a unique long-term time series of data collected in the well-preserved Bay of Calvi (Corsica island, Ligurian Sea, NW Mediterranean) from 1979 and 2014 to explore the synchrony between changes in environmental conditions and phyto- and zooplankton dynamics. We identified an almost decadal, long-term variability in winter intensity, with three distinct periods: the 1980s (1979-1988), the 1990s (1989-1998) and the 2000s (1999-2014), which were characterized by moderate, mild and highly variable winters, respectively. We pointed out how the decadal changes in winter intensity affected (i) the duration and intensity of phyto- and zooplankton blooms, (ii) the mean yearly biomasses, and (iii) the nature of the assemblages. High phyto- and zooplankton biomasses were observed in years characterized by moderate and severe winters, and low phyto- and zooplankton abundances were recorded in years with mild winters. Moderate/severe and mild winters were favorable for diatoms and gelatinous zooplankton, respectively. Focusing on meroplanktonic species, we explored ecological consequences of decadal variations observed in the Bay of Calvi for resource management. We highlighted parallelisms with other European seas. [less ▲]

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See detailCounseling Program For Caregivers Of People With Alzheimer's Disease: A Case Study
Clesse, Audrey ULg; Adam, Stéphane ULg

Poster (2015, October)

It is widely recognized that living day to day with a family member with Alzheimer's disease is a difficult situation for the relatives. Burden generated by this disease can lead to psychological and ... [more ▼]

It is widely recognized that living day to day with a family member with Alzheimer's disease is a difficult situation for the relatives. Burden generated by this disease can lead to psychological and physical exhaustion for the caregiver, called burnout. Several health studies have shown that caregivers are a population at risk, particularly in terms of depressive symptoms (Covinsky et al., 2003), psychological distress (Pinquart and Sörensen, 2003) or health problems (Schulz et al., 1997). They also present a higher risk of mortality than noncaregivers (Schulz and Beach, 1999). Given these results, we understand the major interest of establishing support program to offer therapeutic monitoring for people caring for a relative with dementia. We present Mrs C.G’s case study, who followed the counselling program developed by Adam et al. (2009). This program aims to meet the specific demands of the caregiver by providing informative elements about the disease, relevant advice based on cognitive functioning through the specific profile of the patient and real daily challenges experienced by the caregiver. The “stress management approach” proposed by Zarit et al. (1987) induces the use of coping strategies focused on problem solving. The comparison between pre and post-intervention brings us positive elements, particularly in enhancement of the caregiver’s quality of life, of his sense of competence and efficiency in managing the disease on a daily basis. About burnout, which was the primary focus this intervention, we find that emotional exhaustion tends to decrease during the counselling sessions. A particularly important finding relates to family changes made throughout the therapy, questioning the organization of family dynamics. These positive results show the importance of developing support programs for caregivers adapted to their needs. Moreover, training therapists for this purpose seems essential because it requires a comprehensive and holistic clinical approach, given the neuropsychological, cognitive behavioural and systemic components involved. [less ▲]

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See detailPALEO-DELTA: Palaeoenvironment and geoarchaeology of the Medjerda delta (Tunisia)
Pleuger, Elisa ULg; Abichou, Hakim; Gadhoum, Ahmed et al

Poster (2015, October)

Phoenician Utica remains today largely unknown, as is its role in the Phoenician expansion in the western Mediterranean. Aristotle and Pliny the Elder mention Utica as a maritime and port city and ... [more ▼]

Phoenician Utica remains today largely unknown, as is its role in the Phoenician expansion in the western Mediterranean. Aristotle and Pliny the Elder mention Utica as a maritime and port city and estimate its origin around the 11th c. BC. However, in the present state of research, no archaeological evidence is earlier than the 9th c. BC, and the location of the Phoenician and Roman port infrastructures remains unknown. Today, the ancient city is located on a promontory in the heart of the Medjerda delta, 10 km inland. This project proposes an interdisciplinary effort to understand the Medjerda delta landscape changes during the Holocene. It starts from an archaeological problem and proposes the contribution of geoarchaeology to the understanding of the relationship between ancient societies and their environment. The fluvial palaeoenvironments and sedimentary processes are studied through the mechanical extraction of cores (15-20 m deep) to reach the early Holocene. Selected sediment samples are then studied in laboratory, using different and complementary approaches. The location of port infrastructures will bring initial answers to the question of the foundation of the city. The study of river palaeoenvironments of the Medjerda delta during the Holocene aim at a better understanding of the nature of the settlement, as well as the function of the city of Utica over time. This study will also assess the impact of the ancient city on the environment and understand how the city adapted to the mobility of this Mediterranean delta. Furthermore, the analysis of sedimentary processes causing the filling of the harbour basin will lead to speculation about the causes of the abandonment of the structures and more generally the decline of the city in favor of Carthage. It will also examine whether natural or anthropogenic factors have influenced this deltaic progradation over the centuries. [less ▲]

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See detailComparative study of experimental infection of piglets with a field strain of wild boar HEV, a wild boar HEV strain previously passed in porcine model and a swine HEV strain
Thiry, Damien ULg; Rose, Nicolas; Mauroy, Axel ULg et al

Poster (2015, October)

Domestic pig and wild boar are reservoirs for hepatitis E virus (HEV). This study aims to investigate the infection of pigs with HEV strains from wild boar and to compare the behaviour of a wild boar ... [more ▼]

Domestic pig and wild boar are reservoirs for hepatitis E virus (HEV). This study aims to investigate the infection of pigs with HEV strains from wild boar and to compare the behaviour of a wild boar strain to a pig strain in vivo. The objective is to contribute to the elucidation of the crossing barrier between wild boar and pig with this zoonotic virus. A total of 12 specific pathogen free piglets were divided into four groups and orally inoculated respectively with a wild boar HEV strain previously passed in pigs (WbHEV), a wild boar HEV (WbHEVs), a swine HEV (SwHEV) and a negative control group. One pig from each group was euthanized 15 days after inoculation. The remaining pigs were sacrificed on day 56. A serological monitoring by ELISA was realized throughout the experiment, the viral load was determined in different organs by qRT-PCR. Viral RNA was found in several organs and tissues of the inoculated pigs. Most of the pigs were HEV positive at the 15th day and no clinical signs were observed during infection. Liver enzymes (ALT and AST) remained within the reference values. This study provides experimental evidence of the swine infection with a strain of HEV isolated from wild boar and previously passed in pig. Furthermore, these data indicate the possibility of the transfer of the virus from wild boar to pig, for example, in the context of outdoor pig breeding. [less ▲]

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See detailStatistical analysis and multi-instrument overview of the quasi-periodic 1-hour pulsations in the Saturn's outer magnetosphere
Palmaerts, Benjamin ULg; Roussos, Elias; Krupp, Norbert et al

Poster (2015, September 29)

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See detailTrace metal speciation? An essential aspect of biomonitoring to avoid wrong conclusions
Richir, Jonathan ULg; Lepoint, Gilles ULg; Donnay, Annick et al

Poster (2015, September 29)

The Mediterranean mussel Mytilus galloprovincialis is widely used as a bioindicator species in active monitoring surveys. As a filter feeder artificially maintained in the water column, it bioaccumulates ... [more ▼]

The Mediterranean mussel Mytilus galloprovincialis is widely used as a bioindicator species in active monitoring surveys. As a filter feeder artificially maintained in the water column, it bioaccumulates trace metals from the surrounding water in their dissolved and particulate forms. However, most monitoring surveys don’t take into account that speciation aspect when studying trace metal accumulation kinetics in mussels. In the framework of the STARECAPMED project, we monitored trace metal concentrations in the flesh of mussels together with their “most bioavailable” dissolved and particulate fractions in the water column for almost 5 months (February-June 2011). Mussels were purchased from 2 little contaminated French shellfish farms (SARL Etang de Diane and ferme marine des Aresquiers), placed in several pouches to allow regular sampling, and immerged near the Oceanographic Research Station STARESO in the Calvi bay, northwestern Corsica. Mussels and water samples for suspended matter filtration were collected every week to two weeks, as were deployed DGTs. Seawater samples were filtered through 47 mm hydrophilic PTFE membrane filters with a 0.45 µm pore size until clogging. In the laboratory, mussel flesh and filters were digested in Teflon vessels with acids (HNO3/H202) in a closed microwave digestion lab station. DGT resins were eluted for 24h in 1.0 M HNO3. Trace metal concentrations (Cr, Mn, Co, Ni, Cu, Zn, Ag, Cd, Pb) were measured by DRC-ICP-MS. Analytical accuracy was checked by analyzing CRMs. All the studied metals except Pb and Zn were present in the water column to over 80% in their dissolved form. The contribution of the dissolved pathway was thus likely to be predominant in the oligotrophic Calvi bay. Dissolved trace metals showed little temporal variability of their levels, likely resulting from the integration over time of their levels in the DGT probes and the lack of seasonality of this fraction. In contrast, Zn showed great variability of its particulate fraction during the survey. Such temporal variability was also observed for Cr, more abundant in its particulate form at the end of the survey, and for Mn and Pb that conversely tended to decrease. The dynamic of trace metals in the mussel flesh is regulated by the environmental bioavailability of dissolved and particulate metals, the ecophysiological status of mussels and the trophic conditions of the water body. In the oligotrophic Calvi bay, showing background contamination levels by metals, the trophic conditions played a major role once out of the spring plankton bloom. It led to the increase of metal concentrations measured in the flesh of mussels undergoing starvation. However, some metals such as Cu and Co displayed only little temporal variations of their concentrations, these essential micronutrients being well regulated. The combined study of trace metal bioavailability and mussel ecophysiology in defined environmental conditions allows discriminating against biotic and abiotic factors regulating contaminant uptake in mussels, thus avoiding wrong conclusions about the observed dynamics of the studied contaminants. Mussels are a good proxy of coastal water quality, but their proper use notably requires adjustment of raw contaminant concentrations with trophic status of monitored sites. [less ▲]

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See detailAnalysis of the retaining wall design problem in the framework of the Tyler Rationale
Charlier, Robert ULg; Bertrand, François ULg; Cerfontaine, Benjamin ULg et al

Poster (2015, September 28)

The coherence of any education system lies on the respect of the Tyler Rationale which puts the relationship between the objectives, the teaching method and the evaluation forward. The practical part of ... [more ▼]

The coherence of any education system lies on the respect of the Tyler Rationale which puts the relationship between the objectives, the teaching method and the evaluation forward. The practical part of the examination of the course of Geotechnics generally includes a retaining wall design problem. We listed and classified the mistakes identified in the student answers for the retaining wall design problem. In this classification, the mistakes specific to geotechnics are distinguished from the ones which are not specific to geotechnics. This list allows the teacher to be aware of the most common mistakes so he can insist on things not to do during the learning experiences. The classification is also fundamental. Indeed, if a student failed essentially because of a lack of pre-requisites, there is no reason he succeed by repeating the course in the same conditions. He should be therefore redirected to a self-regulating. [less ▲]

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See detailPhysical benefits of a multidisciplinary rehabilitation program after breast cancer
Leclerc, Anne-France ULg; FOIDART-DESSALLE, Marguerite ULg; Bury, Thierry ULg et al

Poster (2015, September 26)

Background : Breast cancer is the most frequent cancer in women, affecting 8 women out of 100. With early detection and improved treatments, the number of deaths linked to this disease has declined ... [more ▼]

Background : Breast cancer is the most frequent cancer in women, affecting 8 women out of 100. With early detection and improved treatments, the number of deaths linked to this disease has declined. However, the disease and its treatments are at the origin of many undesirable side effects such as fatigue, anxiety, weight gain and decreased physical fitness. The objective of this study is to determine the physical benefits of a multidisciplinary rehabilitation program among women treated for breast cancer (on average six months after the end of the adjuvant radiotherapy or chimiotherapy). Material and methods : 122 patients were included into a control group (n = 61) and a treated group (n = 61). All participants were submitted to evaluations before the beginning of the trial and after three months. These evaluations included functional assessments (a maximal incremental exercise protocol on a cycle ergometer, flexibility by Sit and Reach Test and walking distance by Six-Minute Walk Test), anthropometric and body composition measurements (Body Mass Index and body fat percentage) and different questionnaires on quality of life, anxiety and other symptoms related to cancer. The control group has received no intervention unlike the treated group that received a three-month rehabilitation including supervised physical training (90 min) with three times a week and various psycho-educational sessions (120 min) once a week. Results : After three months, maximal oxygen consumption (p < 0,0001), maximal aerobic power (p < 0,0001), peak of ventilation (p < 0,0001) and time to exhaustion (p = 0,0055) during the maximal incremental exercise protocol improve significantly in the treated group. This observation also applies to flexibility (p < 0,0001), walking distance in six minutes (p < 0,0001) and different physical and psychological parameters obtained through questionnaires. In the control group, these improvements do not appear and a significant increase in body mass index (p = 0,032) and body fat percentage (p = 0,034) is observed while these data remain constant in the treated group. Conclusions : This study shows the feasibility and physical benefits of such a multidisciplinary oncological rehabilitation program in women after their treatments for breast cancer. Additional studies are needed to know the optimal time of beginning (during treatments or after them) and the optimal management time for this support. [less ▲]

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See detailMyoferlin: an indispensable component in VEGFA secretion by pancreas cancer cells.
Fahmy, Karim ULg

Poster (2015, September 24)

In this poster, our laboratory showed the importance of myoferlin, a biomarker of pancreas cancer, in the controle of VEGF-A mediated angiogenesis. Our laboratory showed that silencing myoferlin in ... [more ▼]

In this poster, our laboratory showed the importance of myoferlin, a biomarker of pancreas cancer, in the controle of VEGF-A mediated angiogenesis. Our laboratory showed that silencing myoferlin in pancreas cancer cells, BxPC-3, provoques a decrease in cell prolifération in vitro and a decrease in tumor volumes in animal model. Myoferlin silencing also provokes a decrease in VEGF-A secretion in the conditioned medium and that decrease was abserved in the animal model as a decrease in microvessels dencity. It appeared that this decrease in secretion is due to a a blockage in the exocytosis. Our data also showed a significate correlation between myoferlin expression and microvessels density in patients section. [less ▲]

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See detailUse of the wavelet theory as a tool to investigate the l-abelian complexity of a sequence
Kleyntssens, Thomas ULg; Nicolay, Samuel ULg; Vandomme, Elise ULg et al

Poster (2015, September 23)

The concept of k-automatic sequences is at the intersection of number theory and formal language theory. It has been generalized by the notion of k-regularity that allows to study sequences with values in ... [more ▼]

The concept of k-automatic sequences is at the intersection of number theory and formal language theory. It has been generalized by the notion of k-regularity that allows to study sequences with values in a (possibly infinite) ring. This concept provides us with structural information about how the different terms of the sequence are related to each other. They are many different notions related to the measure of complexity of an infinite sequence w. A classical approach is its factor complexity. In an abelian context, the analogue to the factor complexity is the abelian complexity where the number of distinct factors of length n is counted up to abelian equivalence. The notion of abelian complexity was extended to that of l-abelian complexity. In this talk, I propose to use tools from the wavelet theory to analyze the l-abelian complexity. For the numerical simulations, I apply the wavelet leaders method that allows to study the pointwise regularity of signals. [less ▲]

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See detailEFFECT OF TRUNK MOTOR CONTROL TRAINING IN ELITE SOCCER PLAYERS WITH LOW BACK PAIN
GROSDENT, Stéphanie ULg; Demoulin, Christophe ULg; Rodriguez de la Cruz, Carlos ULg et al

Poster (2015, September 18)

Background and aims: The purpose of this study was to examine the effect of a motor control training program on the lumbopelvic motor control (LMC) in elite soccer players with a history of low back pain ... [more ▼]

Background and aims: The purpose of this study was to examine the effect of a motor control training program on the lumbopelvic motor control (LMC) in elite soccer players with a history of low back pain (LBP). Methods: Twenty-four male elite soccer players (mean age of 18.3 years) filled in questionnaires related to LBP and were divided into two groups: 12 players with a history of LBP (LBP group) and 12 players without a history of LBP (no LBP group). Then, they performed five LMC tests [the Bent Knee Fall Out test (BKFO), the Knee Lift Abdominal Test (KLAT), the Sitting Knee Extension Test (SKET), the Waiter’s Bow (WB) and the test of the transversus abdominis (TrA)] which were conducted and scored (0=failed, 1=correct) by a physiotherapist, blinded to the medical history of the participants. The total LMC score (ranging from 0 to 5) was calculated by adding the score at each test. During the following 10 weeks, the no LBP group conducted a soccer training as usual while LBP group performed an additional specific core stability program (1h/week). Results: At baseline, the participants of the LBP group had a worse LMC than the no LBP group (mean LMC score of 1.1 vs 3.1, p<0.01). The between-groups difference was particularly marked for the BKFO (p<0.01), KLAT (p<0.01) and SKET (p<0.05) tests. At the end of the intervention program, the LMC score of the players with a history of LBP increased significantly (p<0.0001) and was similar to the score of the players without a history of LBP (mean LMC score of 3.2 vs 3.3, p=1.00). Conclusions: LMC can be decreased in elite active soccer players with a history of LBP. Specific core stability program is effective to improve LMC in these players. [less ▲]

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See detailUnderground Pumped Storage Hydroelectricity (UPSH) using abandoned works
Pujades, Estanislao ULg; Willems, Thibault ULg; Orban, Philippe ULg et al

Poster (2015, September 17)

Underground Pumped Storage Hydroelectricity (UPSH) using abandoned works is an interesting alternative to increase the efficiency of some power plants, which cannot regulate the amount of electricity ... [more ▼]

Underground Pumped Storage Hydroelectricity (UPSH) using abandoned works is an interesting alternative to increase the efficiency of some power plants, which cannot regulate the amount of electricity generated according to the demand. UPSH plants can store (pumping water from an underground to an upper reservoir) or produce energy (releasing water from an upper to an underground reservoir) during the low or high demand periods. Two considerations must be taken into account in order to construct an UPSH plant: 1) the alteration of the natural conditions of aquifers and 2), the efficiency of the plant, which depends on the hydraulic head inside the underground reservoir. Obviously, a detailed numerical model must be necessary to design a plant. However, a screening methodology to apply during the early stages of the design of a UPSH plant in order to reject the most disadvantageous sites in a short period of time would be useful. Groundwater flow impacts caused by UPSH plants are analyzed numerically and the main variables involved in the groundwater evolution are identified. The most noticeable effect consists in an oscillation of the groundwater. The hydraulic head around which groundwater oscillates, the magnitude of the oscillations and the time to achieve a pseudo-steady state (magnitude and head reached during oscillations do not vary anymore with time) depend on the boundaries, the parameters of the aquifer and the characteristics of the underground reservoir. From the numerical study, a screening methodology, which is based on existing analytical procedures (solutions for large diameter wells, methodologies for cyclic pumpings and the image well theory), is proposed to assess the main impacts caused in aquifers by UPSH plants and their efficiency regarding the groundwater evolution inside the reservoir. The procedure can be applied in a relatively short period of time and is useful to select those appropriate sites to construct a UPSH plant. [less ▲]

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See detailHydrogeological assessment of diaphragm walls used to excavate deep shafts associated to tunnels construction
Pujades, Estanislao ULg; Jurado, Anna; Carrera, Jesus et al

Poster (2015, September 17)

Deep shafts are usually required during tunnels construction (for maintenance tasks when tunnel boring machines –TBM- are used) and/or the operation stage of tunnels (emergency exits). Generally, these ... [more ▼]

Deep shafts are usually required during tunnels construction (for maintenance tasks when tunnel boring machines –TBM- are used) and/or the operation stage of tunnels (emergency exits). Generally, these shafts are constructed below the water table and by the cut and cover method. Therefore, impervious diaphragm walls are desired for two main reasons: (1) to reduce risks (stability, inflows, flooding, etc.) and outside impacts (loose of groundwater resource, holes and sinkholes, etc.) during the excavation stage of a shaft and, (2) to avoid leaks and inflows of groundwater during the operation stage once the shaft is finished. Given that defects in diaphragm walls are frequent and can relatively easy be repaired before starting the excavation stage, a useful and new methodology to assess the state of enclosures before excavation is proposed. Its use would allow to reduce impacts on groundwater (construction and operation stages) and costs in case of defects as well as to increase the safety during the construction. The groundwater response regarding different scenarios of diaphragm walls is studied numerically in order to propose a successful procedure to evaluate underground enclosures imperviousness by internal pumping tests. The scenarios consist in circular and square enclosures where the diaphragm walls are assumed as homogeneous (with numerous defects) or heterogeneous (one discrete defect). The homogeneous cases are modeled by considering different effective hydraulic conductivities, while the size and position of the single defect is varied in the simulations of heterogeneous walls. An analysis of diagnostic plots and the comparison between the expected and measured groundwater evolutions inside the enclosure, is proposed to ascertain: (1) if the diaphragm walls can be considered as homogeneous or heterogeneous, (2) the effective hydraulic conductivity of the walls (if they are homogeneous) and, (3) the position of a defect (if they are heterogeneous). [less ▲]

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See detailNDS27, the soluble derivative from curcumin binds to and inhibits myeloperoxidase
Franck, Thierry ULg; Derochette, Sandrine ULg; Zouaoui-Boudjeltia, Karim et al

Poster (2015, September 16)

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See detailThe Red Marble of Baelen, an exceptional mid-Famennian mud mound complex in a carbonate ramp setting from Eastern Belgium
Dreesen, Roland; Vachard, Daniel; Marion, Jean-Marc ULg et al

Poster (2015, September 14)

The Red Marble of Baelen from the Limbourg area (Vesdre Basin, Eastern Belgium) represents a member of the middle Famennian (late Upper Devonian) Souverain-Pré Formation (Late marginifera conodont Zone ... [more ▼]

The Red Marble of Baelen from the Limbourg area (Vesdre Basin, Eastern Belgium) represents a member of the middle Famennian (late Upper Devonian) Souverain-Pré Formation (Late marginifera conodont Zone). It corresponds to a short-term transgressive event and eustatic rise during the Famennian, interrupting the regressive megasequence on the Condroz shelf in Belgium. It is the only known or at least the only well-documented mid-Famennian carbonate mud mound complex worldwide, after the end-Frasnian mass extinction that wiped out numerous invertebrate taxa. [less ▲]

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See detailPt-Ni Hollow Nanoparticles for Oxygen Reduction Reaction : Controlling the Nanoparticle Morphology
Asset, Tristan ULg; Zubiaur, Anthony ULg; Chattot, Raphael et al

Poster (2015, September 13)

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See detailCHEMOKINE (CC-MOTIF) LIGAND 2 AS A PROGNOSTIC SERUM MARKER IN CANINE IDIOPATHIC PULMONARY FIBROSIS
Roels, Elodie ULg; Holopainen, S.; Teske, Erik ULg et al

Poster (2015, September 11)

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See detailNew efficient organocatalytic system for solvent-free chemical fixation of CO2 into epoxides
Panchireddy, Satyannarayana ULg; Gennen, Sandro ULg; Alves, Margot ULg et al

Poster (2015, September 11)

Due to concerns about global warming combined with the decrease of fossil resources, the chemical transformation of carbon dioxide (CO2) 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 (CO2) into added-value products has gained interest in both academic and industrial fields. To date, the chemical fixation of CO2 onto epoxides with the formation of cyclic carbonates (CC) is one of the most promising ways to valorise CO2 at an industrial scale. Indeed, CC are useful monomers for polycarbonate synthesis and they can react with primary amines to produce 2-hydroxyethylurethane. This reaction can be extrapolated to the synthesis of non-isocyanate polyurethanes (NIPUs) by a step growth polymerization between bifunctional CC and diamines. [less ▲]

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See detailCobalt-mediated radical polymerization for the precision design of novel poly(ionic liquid) copolymers in aqueous media
Cordella, Daniela ULg; Kermagoret, Anthony; Debuigne, Antoine ULg et al

Poster (2015, September 11)

Poly(ionic liquid)s (PILs) have emerged as a special class of polyelectrolyte materials, featuring tunable solubility, high ionic conductivity, and a broad range of glass transition temperatures. Due to ... [more ▼]

Poly(ionic liquid)s (PILs) have emerged as a special class of polyelectrolyte materials, featuring tunable solubility, high ionic conductivity, and a broad range of glass transition temperatures. Due to their specific properties emanating from the ionic liquid (IL) units and their intrinsic polymeric nature, PILs find potential applications in various areas, such as analytical chemistry, biotechnology, gas separation, dispersants, solid ionic conductors for energy, catalysis, etc. In recent years, controlled radical polymerization (CRP) techniques have been applied to the synthesis of structurally well-defined PILs, with control attained over molar mass, dispersity, and end-group fidelity. In this poster, we will report on the implementation of cobalt-mediated radical polymerization (CMRP) technique for the precision synthesis of unprecedented PILs (co)polymers. We will discuss how an organocobalt complex can efficiently control the growth of vinyl imidazolium chains and lead to PILs with predicted molar masses and low polydispersities under mild experimental conditions, thus at low temperature and using water as a green polymerization medium. The huge potential of this system will be highlighted by describing the one-pot synthesis of all vinyl imidazolium-based block copolymers in aqueous media. This CMRP is unique for providing well-defined vinyl imidazolium based-copolymers for advanced PILs applications. [less ▲]

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See detailNovel organocobalt for the synthesis of functional polymers
Demarteau, Jérémy ULg; Kermagoret, Anthony; Jérôme, Christine ULg et al

Poster (2015, September 11)

Organocobalt(III) with acetylacetonate (acac) ligands is the most representative example of R-Co bearing a labile C-Co bond that can release alkyl radicals under mild experimental conditions without ... [more ▼]

Organocobalt(III) with acetylacetonate (acac) ligands is the most representative example of R-Co bearing a labile C-Co bond that can release alkyl radicals under mild experimental conditions without requiring a photoactivation. The unique isolated R-Co is a short oligo(vinyl acetate) end-capped by Co(acac)2. The high lability of its C-Co bond combined to the unique capacity of Co(acac)2 to reversibly trap alkyl radicals make this R-Co unique for the precision design of unprecedented polymers by Cobalt-Mediated Radical Polymerization (CMRP). The growth of unstabilized and highly reactive growing radicals formed by the addition of R• to unconjugated vinyl monomers (vinyl esters, vinyl amides, vinyl imidazolium, vinyl chloride, etc;) is controlled by the reversible formation of a weak C-Co bond at the polymer chain end. The lack of alternatives to this R-Co, especially to the structure of the alkyl group, has however placed limitations on post-functionalizations of end-chains. Other functional variants that would enable attractive chain-end derivatizations are unfortunately not available. In this poster, we will address this important challenge by describing an innovative synthetic route towards the preparation of new functional R-Co(acac)2 that are sources of halomethyl radicals under mild experimental conditions. The efficiency of these novel organocobalt complexes for the precision synthesis of end-functional and telechelic polymers will be described. Also, the solubility of these complexes in water enables the facile production of end-functionalized water soluble poly(ionic liquid)s. Further derivatizations of the halomethyl group at the chain-end of polymers produced by this system will be demonstrated by click reaction, largely broadening the range of possible functional groups. Finally, besides numerous applications in macromolecular engineering, this unexplored family of R-Co presents a high potential in radical reactions in organic synthesis by the facile production of halomethyl radicals. [less ▲]

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See detailIntercalation of imidazolium end-functionalized polyphosphates between montmorillonite nanosheets towards flame-retardant
Carion, Stéphan ULg; Lecomte, Philippe ULg; Thomassin, Jean-Michel ULg et al

Poster (2015, September 11)

Among the additives used to impart flame-retardant properties to polymer materials, phosphorous additives and nanoclays are widely used. The aim of this work is to associate both additives to bring about ... [more ▼]

Among the additives used to impart flame-retardant properties to polymer materials, phosphorous additives and nanoclays are widely used. The aim of this work is to associate both additives to bring about a synergetic effect for improving the flame-retardancy of the material (1). In a first step, the synthesis of an aliphatic polyphosphate end-capped by an imidazolium cation is reported. Secondly, this polymer is intercalated between montmorillonite nanoclays. The strategy used for the synthesis of the polyphosphate is based on the ring-opening polymerization of the corresponding cyclic phosphate by using 1-(11-hydroxy-undecyl)-3-methylimidazolium bromide as an initiator. This polymerization was catalyzed by DBU and a thiourea derivative (2). This polymer was characterized by a set of techniques (31P and 1H NMR, SEC, TGA, DSC). Finally, the cationic end-functionalized polymer was exchanged with sodium cations present in montmorillonite. The intercalation of the polyphosphate between the clay nanosheets was proved by X-Ray Diffraction (XRD) and thermogravimetric analysis (TGA). This last technique was also used to determine the influence of the intercalation on the thermal stability of the polyphosphate. [less ▲]

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See detailDegradation of p-nitrophenol and bacteria with TiO2 xerogels sensitized in situ with tetra(4-carboxyphenyl)porphyrins
Tasseroul, Ludivine ULg; Lambert, Stéphanie ULg; Eskenazi, David et al

Poster (2015, September 10)

Heterogeneous photocatalysis is widely studied for environmental applications as oxidative processes can completely destroy organic pollutants such as alkanes, pesticides, dyes, etc. and microorganisms ... [more ▼]

Heterogeneous photocatalysis is widely studied for environmental applications as oxidative processes can completely destroy organic pollutants such as alkanes, pesticides, dyes, etc. and microorganisms. The most used photocatalyst is the commercial TiO2 Degussa P25, which is composed of 80% anatase and 20% rutile and which is active when TiO2 is exposed to UV light ( < 380 nm). Recently, several studies have been performed to extend the light absorption range of TiO2 towards the visible range. In this study, TiO2-based materials doped with porphyrins, a widely used dye for the photosensibilization of TiO2, have been prepared using a sol-gel process. To stabilize the TiO2-dye interactions, free metal tetra(4-carboxyphenyl)porphyrin and nickel tetra(4-carboxyphenyl)porphyrin were introduced in situ into the TiO2 matrix during the sol-gel process rather than by grafting. Samples were thoroughly characterized by TEM, X-ray diffraction, FT-IR, DR-UV/Vis and their texture has been examined by nitrogen adsorption–desorption at 77 K. The photocatalytic activity for the degradation of p-nitrophenol and Escherichia coli and Lactobacillus rhamnosus bacteria cells in aqueous medium, under halogen lamp light have been evaluated in relation with the physico-chemical modifications induced by the doping. The low temperature vacuum drying protocol (150°C) used in the present study enabled to obtain porphyrin doped TiO2 xerogels with a high specific surface area, and containing nanoparticles composed of amorphous- and anatase-TiO2. Diffuse reflectance spectroscopy attest the presence of TCPPH2 and TCPPNi within the TiO2 matrix. In a first step, the photoactivity of the xerogels is tested for p-nitrophenol degradation. Results show that crystallinity and nature and concentration of porphyrin introduced in situ have major impact on the degradation performances. In a second step, the best xerogel for p-nitrophenol degradation has been used to degrade bacteria. This xerogel degrades E. coli and L. rhamnosus bacteria cells in less than 48 and 24 h respectively. The photocatalytic degradation of a pollutant is thus correlated to the degradation of bacteria since a xerogel doped with the TCPPNi degrades both p-nitrophenol, E. coli and L. rhamnosus. [less ▲]

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See detailCharacterization of the magnetic properties of a continuously coated YBCO coated conductor cylinder in persistent current mode
Wera, Laurent ULg; Fagnard, Jean-François ULg; Hogan, Kevin ULg et al

Poster (2015, September 09)

YBCO coated conductors are good candidates for magnetic shielding applications because of (i) their high current density and (ii) their lower weight compared to magnetic shields made of bulk HTS materials ... [more ▼]

YBCO coated conductors are good candidates for magnetic shielding applications because of (i) their high current density and (ii) their lower weight compared to magnetic shields made of bulk HTS materials. In particular, an efficient superconducting magnetic shield can be built as an assembly of milled YBCO 2G coated conductor tape sections, or, as in this case, a continuously coated cylinder. The purpose of the present work is to characterize experimentally the DC magnetic properties of a continuous band of YBCO film (about 1 cm width) deposited around a hastelloy cylinder of 6.4 cm in diameter. In particular, we characterize the distribution and the time dependence of the trapped field inside the cylinder due to persistent current loops. We also investigate the magnetic shielding properties at several sweep rates when the applied magnetic field is parallel to the main axis of the cylinder. All measurements are carried out at 77 K. The measurement of the trapped field of the cylinder gives evidence that a persistent current of about 80 A can be induced in the YBCO band. Magnetic shielding measurements show that, thanks to the persistent current flowing in the band, the cylinder is able to attenuate by a factor of 2 the applied magnetic field. These results open interesting perspectives for a further development of magnetic shields made of coated conductor cylinders. We investigate how the shielding performances could be further improved by increasing the number of layers and by increasing the height of the cylinder. The results are compared to a multilayer coated conductor cylinder with joints and to persistent current loops obtained with milled coated conductor tape sections. [less ▲]

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See detailDesign of the superconducting end caps of a tubular magnetic shield.
Wera, Laurent ULg; Fagnard, Jean-François ULg; Hogan, Kevin ULg et al

Poster (2015, September 09)

Shielding a sensitive device against DC or AC stray magnetic fields can be realized very efficiently with high-Tc superconductors. A simple magnetic shield can be obtained with a tube enclosing the device ... [more ▼]

Shielding a sensitive device against DC or AC stray magnetic fields can be realized very efficiently with high-Tc superconductors. A simple magnetic shield can be obtained with a tube enclosing the device, which is protected against external fields until the magnetic flux diffuses either across the tube wall or through the end openings. A better shielding vessel is obtained by using superconducting end caps. In the simplest design, the end caps, consisting of superconducting disks placed at the extremities of the tube, are making a 90 degree angle with the tube wall. Because of demagnetization effects, this arrangement results in a 'weak spot' for the penetrating magnetic flux. In this work, we investigate numerically different shapes for the end caps so as to avoid sharp angles and obtain a smoother magnetic flux penetration. The external magnetic induction is applied parallel to the shield axis. The magnetic flux distribution and the shielding currents are calculated with a finite element approach. The shielded volume is defined as the region where the local magnetic flux density is attenuated below a given fraction of the external field. It is studied as a function of the shape of the cap, its superconducting properties, the aspect ratio of the assembly, and the presence of a cabling hole. Curved and elongated caps, which could in principle be obtained by melt cast processing or different coating techniques, are shown to substantially increase the shielded volume. [less ▲]

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