References of "Scientific congresses and symposiums"
     in
Bookmark and Share    
Full Text
See detailLes Ressources Sauvages des Bois de Tapia (Uapaca bojeri) à Madagascar
Barsics, Fanny ULg; Malaisse, François ULg; Razafimanantsoa, Tsiresy et al

Poster (2013, October 19)

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailPPNAD- a rare cause of Cushing's syndrome
Rostomyan, Liliya ULg; PETIGNOT, Sandrine ULg; VROONEN, Laurent ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailBifocal intracranial germinoma : is biopsy still mandatory ?
KREUTZ, Julie ULg; TSHIBANDA, Luaba ULg; BONNEVILLE, Jean-François ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

Detailed reference viewed: 14 (1 ULg)
See detailL'entomophagie, Défis du futur ?
Caparros Megido, Rudy ULg; Francis, Frédéric ULg

Conference (2013, October 19)

En 2050, il faudra nourrir 9 milliards d¿individus sur terre, soit 1,33 fois plus qu'à l'heure actuelle. De plus, la consommation humaine devrait augmenter de 1,77 fois suite au nouveau mode de ... [more ▼]

En 2050, il faudra nourrir 9 milliards d¿individus sur terre, soit 1,33 fois plus qu'à l'heure actuelle. De plus, la consommation humaine devrait augmenter de 1,77 fois suite au nouveau mode de consommation des pays émergents. Vu la difficulté actuelle de trouver de nouvelles surfaces cultivables ou de production, d'autres alternatives sont à mettre en évidence. A l'unité d'Entomologie de Gembloux Agro-Bio Tech, nous avons décidé de développer l'entomophagie ou la consommation d'insectes par l'être humain. Plus ou moins 1500 espèces sont consommées dans le monde parmi divers ordre d'insectes dont les principaux sont les Coléoptères (30% des espèces consommées), les Lépidoptères (17%), les Hyménoptères (13%), les Orthoptères (10%) et les Hémiptères (8%). Il est légitime de se demander l'intérêt de consommer des insectes. Premièrement, ces derniers possèdent des qualités nutritionnelles remarquables (taux de protéines, d¿acide gras non saturés, de vitamines et de minéraux importants) en fonction de l'espèce-cible, de son stade de développement et de sa diète de développement. Deuxièmement, ils possèdent un meilleur taux de conversion de la nourriture que les élevages conventionnels (10 kg de fourrage donne 1kg de bœuf contre 8 kg d'insectes) et ils possèdent un faible impact environnemental (3 fois moins d'émission de gaz à effet de serre). Finalement, des études complémentaires sur la sûreté de la consommation d'insectes sont à réaliser. En effet, très peu de données sont disponibles sur les allergènes présents dans les insectes ainsi que les maladies ou parasites pouvant être transmis par le biais de leur consommation. [less ▲]

Detailed reference viewed: 44 (5 ULg)
Full Text
See detailMoustiques (Diptera : Culicidae) de la région du M’Zab-Ghardaïa, Algérie : biodiversité et importance médico-vétérinaire
Boukraa, Slimane ULg; Baba Aissa, Nadir; Abdelaziz, Brahim et al

Poster (2013, October 19)

De nombreuses espèces de moustiques sont susceptibles de jouer un rôle dans la transmission de divers agents pathogènes responsables des maladies infectieuses humaines et animales. D'autres, outre leur ... [more ▼]

De nombreuses espèces de moustiques sont susceptibles de jouer un rôle dans la transmission de divers agents pathogènes responsables des maladies infectieuses humaines et animales. D'autres, outre leur rôle vecteur, sont un véritable fléau par les piqûres douloureuses qu’ils occasionnent et, constituent de ce fait un grand problème de nuisance. L'identification précise et la connaissance de la biodiversité fonctionnelle des vecteurs est un pas essentiel pour la compréhension du risque de (ré)-émergence et la dynamiques des maladies vectorielles. Le présent travail est une étude rétrospective des inventaires des Culicidae réalisés sur le terrain dans la région du M’Zab (Ghardaïa, Algérie) durant les années allant de 2008 à 2012. Les résultats de l’étude morphotaxonomique des Culicidae inventoriés ont montré la présence de dix espèces réparties en cinq genres (Culex, Culiseta, Ochlerotatus, Anopheles et Uranotaenia). Un aperçu sur le rôle vectoriel des espèces signalées dans la région et leur importance au niveau de la santé médicale et vétérinaire sont présentés à partir des données bibliographiques. Les espèces potentiellement vectrices d’arbovirus (Virus de Nile occidentale et Virus de la Vallée du Rift) et de protozoaires (Plasmodium spp) qui peuvent causer des problèmes épidémiologique au niveau de la région du M’Zab sont Cx. pipiens sl L., 1758, Cx. theileri Theobald, 1903, Ochlerotatus caspius Pallas, 1771, Anopheles sergentii Theobald, 1907, An. dthali Patton, 1905 et An. multicolor Cambouliu, 1902. [less ▲]

Detailed reference viewed: 34 (3 ULg)
Full Text
Peer Reviewed
See detailModification of hormonal secretion in macroprolactinoma on treatment
VROONEN, Laurent ULg; Rostomyan, Liliya ULg; Potorac, Iulia ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

Detailed reference viewed: 13 (3 ULg)
Full Text
See detailLe taupin : un ravageur souterrain préoccupant
Barsics, Fanny ULg; Haubruge, Eric ULg; Verheggen, François ULg

Poster (2013, October 19)

Detailed reference viewed: 17 (1 ULg)
Full Text
See detailPituitary magnetic resonance imaging in gigantism : first result after analysis of 16 cases
BECK, Emmanuel ULg; KREUTZ, Julie ULg; TSHIBANDA, Luaba ULg et al

in 23rs meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

Detailed reference viewed: 13 (2 ULg)
Full Text
Peer Reviewed
See detailCharacteristics of patients with AIP mutation-related prolactinomas
Camby, S; Daly, Adrian ULg; VROONEN, Laurent ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

Detailed reference viewed: 15 (1 ULg)
Full Text
Peer Reviewed
See detailHypercalcemia treated by sunitinib
LOLY, Jean-Philippe ULg; VALDES SOCIN, Hernan Gonzalo ULg; Daly, Adrian ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

Detailed reference viewed: 21 (6 ULg)
Full Text
Peer Reviewed
See detailCorrelations of the High Resolution MRI aspect of GH-secreting pituitary adenomas prior to treatment
Potorac, Iulia ULg; PETROSSIANS, Patrick ULg; Schillo, F et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailÉlaboration du référentiel de compétences du master bioingénieur en Sciences et Technologies de l'Environnement
Colaux-Castillo-Bocanegra, Catherine ULg; Colinet, Gilles ULg; Debouche, Charles ULg et al

in Poulin, Richard (Ed.) Séminaire CITEF 2013 La liaison formation-emploi : l'approche compétences et la formation tout au long de la vie (2013, October 18)

Le département des Sciences et Technologies de l’Environnement (STE) de Gembloux Agro-Bio Tech faculté de l’Université de Liège a profité d’un changement d’intitulé de son diplôme de bioingénieur pour ... [more ▼]

Le département des Sciences et Technologies de l’Environnement (STE) de Gembloux Agro-Bio Tech faculté de l’Université de Liège a profité d’un changement d’intitulé de son diplôme de bioingénieur pour réviser son programme des études. Pour ce faire, il a adopté l’approche compétence. Afin de préparer au mieux ses futurs diplômés aux attentes du monde professionnel actuel et à venir, des anciens diplômés et des employeurs potentiels ont participé à la validation du référentiel de compétences associé à cette formation. Cette publication reprend les étapes clés de la création du référentiel de compétences et son exploitation dans la conception d’un programme des études cohérent. [less ▲]

Detailed reference viewed: 34 (9 ULg)
See detailQuand les savoirs sociologiques débordent de leurs contextes
Vrancken, Didier ULg

Conference (2013, October 18)

Cet exposé pourrait se résumer autour des deux points suivants. Premièrement, quand les savoirs sociologiques débordent de leurs contextes, il faut les suivre et ceux-ci nous invitent à réfléchir sur un ... [more ▼]

Cet exposé pourrait se résumer autour des deux points suivants. Premièrement, quand les savoirs sociologiques débordent de leurs contextes, il faut les suivre et ceux-ci nous invitent à réfléchir sur un processus de production de connaissances, à suivre Roulleau-Berger, « complexe, pluriel, segmenté et surtout multisitué ». Deuxièmement, penser les sociologies non hégémoniques ne nous exonère en rien de la nécessité de penser leurs conditions de diffusion ni celles des conditions de partage de l’expérience en acceptant de penser non seulement, toujours suivant Roulleau-Berger, « les mouvements, les circulations, les déplacements, les mobilités » mais aussi « des structures sociales stables, des institutions, des groupes sociaux et des individus ». [less ▲]

Detailed reference viewed: 33 (3 ULg)
Full Text
See detailNew Rules, New Political Class? Analysis of the Impact of the Electoral Reforms in Belgium on the 2014 Elections and Aftermath
Dodeigne, Jérémy ULg; Vandeleene, Audrey

Conference (2013, October 18)

At the eve of the 2014 “mammoth elections”, the Belgian electoral systems are in question. According to the eight parties having contributed to the sixth State reform, it is time for a “political renewal” ... [more ▼]

At the eve of the 2014 “mammoth elections”, the Belgian electoral systems are in question. According to the eight parties having contributed to the sixth State reform, it is time for a “political renewal”. The agreement of October 2011 plans that the Senate will cease to be a permanent institution composed of directly elected senators. The latter will be instead replaced by regional MPs with dual offices. The agreement also provides the (principle of) vertical simultaneity between the regional, federal and European elections while it bans dual candidature and forces candidates to seat where they get elected. In the meantime, the Walloon Parliament has adopted the “anti-cumul” Decree, which limits the accumulation of local and parliamentary offices. This research note proposes therefore a global reflexion on the potential consequences resulting from these electoral reforms on the Belgian political class. We proceed in two steps. First, we detail which reforms could affect the political class. Second, we seek to evaluate which impact the reforms may have on the political class. We argue that the electoral reforms adopted for the 6th State reforms but also by the Walloon Parliament confirm and furthermore enhance an already pre-existing trend towards a territorial distinctiveness between the federal and the regional levels. The 2014 elections might become one of the key points of crystallization when political actors become aware of the existence of two distinct political arenas. Overall, the article anticipates the reshaping of Belgian politics in the run-up to 2014 and aftermath. [less ▲]

Detailed reference viewed: 110 (7 ULg)
Full Text
Peer Reviewed
See detailNiveaux du plomb sanguin, du plomb urinaire, de l’acide δ-aminolévulinique et des porphyrines urinaires chez les personnes vivant à Kinshasa, R.D. Congo : une étude pilote de biosurveillance
Mputu Malolo, Corneille-Liévin; Ndelo di Phanzu, Josaphat; Marini Djang'Eing'A, Roland ULg et al

Conference (2013, October 18)

Objectives: Existing naturally in the earth’s crust, Lead is a widely used heavy metal. It is an environment toxicant that may deleteriously affect nervous, hematopoietic, skeletal, renal, endocrine and ... [more ▼]

Objectives: Existing naturally in the earth’s crust, Lead is a widely used heavy metal. It is an environment toxicant that may deleteriously affect nervous, hematopoietic, skeletal, renal, endocrine and reproductive systems. Lead is classified in its inorganic form as possible human carcinogen (group 2A) by IARC. Exposure to lead in the environment continues to be a serious public health problem for all ages. Children are particularly susceptible to lead poisoning. They absorb more lead from their environment and their developing central nervous systems are vulnerable to the toxicant. During the last twenty years, important measures of public health were undertaken in several countries to decrease lead exposure. In the best of our knowledge, this is not the case in D.R. Congo. A study indicated a relatively important lead impregnation of the Kinshasa population (mean 120 μg/L). However, there have been no reported studies in the evaluation of the relationship between urinary lead, urinary δ-aminolevulinic acid (δ-AlaU) and urinary porphyrins and lead blood level in Congolese people. This is the aim of this study targeting at first people living in Kinshasa. Methods: Blood lead and urinary lead levels were measured using inductively coupled plasma mass spectrometry. The Bio-Rad ALA/PBG by Column Test and spectrophotometer method were used to quantify the concentration of δ-Ala in urine. The separation of porphyrins was carried out by HPLC coupled with fluorescence detector. Results: 37% of studied population presented blood lead levels above the 100 μg/L threshold (geometric mean: 133.29 μg/L) with a higher concentration in women than in men (140.30 μg/L vs 130.78 μg/L). 50% of children (0-17 years) presented blood lead levels above the 100 μg/L threshold and 43% of the same population presented blood lead levels above 50 μg/L as accepted nowadays in US. In the adult population, some targeted occupations were found to be associated with high blood lead. A small correlation was observed between urinary lead and blood lead, but no correlation was noticed between δ-AlaU and Porphyrins with lead blood levels. Conclusion: This study confirmed a relatively important Pb impregnation of the Kinshasa population and the existence of a major public health issue requiring corrective actions and the implementation of an appropriate regulation. Also, urinary lead, urinary δ-Ala and urinary porphyrins seems to not to be sensitive markers for monitoring exposure to lead. [less ▲]

Detailed reference viewed: 43 (9 ULg)
Full Text
See detailFlanders Ahead... Wallonia Behind (But Catching Up). The Identity Politics of Science, Technology, and Innovation in Belgium
Van Oudheusden, Michiel ULg; Charlier, Nathan ULg; Rosskamp, Benedikt ULg et al

Conference (2013, October 18)

Drawing on a documentary analysis of two socio-economic policy programs, one Flemish (“Vlaanderen In Actie”), the other Walloon (“Marshall Plans”), and a discourse analysis of how these programs are ... [more ▼]

Drawing on a documentary analysis of two socio-economic policy programs, one Flemish (“Vlaanderen In Actie”), the other Walloon (“Marshall Plans”), and a discourse analysis of how these programs are received in one Flemish and one Francophone quality newspaper, this paper illustrates how Flanders and Wallonia both seek to become top-performing knowledge-based economies (KBEs). The paper discerns a number of discursive repertoires, such as “Catching up,” which policy actors draw on to legitimize or question the transformation of Flanders and Wallonia into KBEs. The “Catching up” repertoire places Flanders resolutely ahead of Wallonia in the global race towards knowledge, excellence, and growth, but suggests that Wallonia may, in due course, overtake Flanders as a top competitive region. Given the expectations and/or fears that “Catching up” evokes among Flemish and Walloon policy actors, the repertoire serves these actors as a flexible discursive resource to make sense of, and shape, their collective futures, and thus their identities. The primary aim of the paper is to underline the simultaneity of, and the interplay between, globalizing forces and particularizing tendencies, as Flanders and Wallonia develop with a global KBE in nation- or region-specific ways. [less ▲]

Detailed reference viewed: 49 (5 ULg)
Peer Reviewed
See detailDébat "Création d'une association francophone en digital humanities"
Dozo, Björn-Olav ULg

Conference (2013, October 18)

Animation et présidence du débat

Detailed reference viewed: 13 (0 ULg)
Full Text
See detailFin de colonie, bricolages du développement. René Clémens et la mobilisation des universitaires liégeois au Katanga dans les années 1955-1960
Poncelet, Marc ULg

Conference (2013, October 18)

From 1955 to 1963 members of University of Liège have been committed in sociological and political interventions in social development in the south urban Katanga. René Clemens was pioneer in sociological ... [more ▼]

From 1955 to 1963 members of University of Liège have been committed in sociological and political interventions in social development in the south urban Katanga. René Clemens was pioneer in sociological field and was also leader of the social interventions in Katanga. [less ▲]

Detailed reference viewed: 20 (2 ULg)
Peer Reviewed
See detailLa médiation par l'art en psychiatrie : culturelle, thérapeutique ou institutionnelle?
Vandeninden, Elise ULg

Conference (2013, October 17)

Ma proposition de communication est issue de ma thèse de doctorat (Approcher la médiation par ses usages professionnels : le cas de l’art-thérapie, Université de Liège, 2012). Les résultats que je propose ... [more ▼]

Ma proposition de communication est issue de ma thèse de doctorat (Approcher la médiation par ses usages professionnels : le cas de l’art-thérapie, Université de Liège, 2012). Les résultats que je propose d’exposer ici sont issus plus particulièrement de mon travail d’observation participante de deux ateliers d’ « art-thérapie » dans deux hopitaux généraux bruxellois (section psychiatrique pour adolescents). Mon objet d’étude, « l’art-thérapie » est une appellation recouvrant un composite de pratiques qui se distinguent en fonction de paramètres multiples . Face à cette hétérogénéité, j’ai dû élaborer ma propore définition, minimale et pragmatique : relève de l’« art-thérapie », toute pratique qui utilise de façon « active » l’art dans le champ de la santé mentale . À cet objet d’étude que constitue l’art-thérapie, j’ai voulu articuler une problématique : celle de la « médiation ». À l’origine de mon travail, il y a donc aussi une ambition qui vise, à partir de l’étude d’un « cas » (Passeron, Revel : 2005), à réfléchir un concept occupant une place centrale dans de nombreuses recherches en SIC. Il s’est donc agi de voir en quoi l’art-thérapie pouvait constituer un « cas » de médiation : Pour le chercheur en SIC, l’art-thérapie peut s’étudier en tant que médiation culturelle dans des institutions non culturelles que sont, ici, les hôpitaux psychiatriques. Pour les art-thérapeutes, on parlera davantage de médiation thérapeutique : comment l’art, en tant que moyen d’expression, permet-il au malade de communiquer, voire de se réinsérer (à travers notamment l’exposition des œuvres). Pour les patients, il est apparu que l’art-thérapie serait plutôt une médiation institutionnelle grâce à laquelle ils peuvent mettre en discussion le contenu des normes qui sont imposée par l’institution psychiatrique. Cette médiation institutionnelle, dominante dans mes observations, est rendue possible non par l’objet artistique en tant que tiers médiateur mais par l’artiste, le tiers « humain ». [less ▲]

Detailed reference viewed: 34 (4 ULg)
Full Text
See detailDevelopment of anti-HPV lipoplexes for the treatment of cervical cancer
Lechanteur, Anna ULg; Furst, Tania ULg; Evrard, Brigitte ULg et al

Conference (2013, October 17)

Detailed reference viewed: 7 (1 ULg)
Peer Reviewed
See detailÀ la recherche d’un rôle : appropriation et bricolage des méthodologies et indicateurs des organisations internationales par les observatoires urbains locaux dans le monde arabe
Farah, Jihad ULg; Teller, Jacques ULg

Conference (2013, October 17)

Dans les dernières décennies, on peut observer chez différentes agences internationales un intérêt croissant pour les méthodologies d’observation et les indicateurs urbains. Dans le monde arabe, ces ... [more ▼]

Dans les dernières décennies, on peut observer chez différentes agences internationales un intérêt croissant pour les méthodologies d’observation et les indicateurs urbains. Dans le monde arabe, ces agences sont un acteur influent contribuant au développement des politiques urbaines, notamment à travers la circulation des outils, méthodologies et bonnes pratiques. UN-HABITAT, en particulier, contribue à cette logique de propagation en mettant en place un nombre d’observatoires urbains locaux qui s’inscrivent dans son réseau d’Observatoire Urbain Global. La dynamique recherchée par ce réseau est surtout l’encouragement des villes à œuvrer dans le sens des Objectifs de Développement du Millénaire et de démarches d’Agenda 21, notamment à travers la mise en avant de l’importance d’un certain nombre d’indicateurs. Notre intervention revient sur les observatoires urbains locaux dans le monde arabe, et en particulier leur appropriation des indicateurs et méthodologies d’UN-HABITAT. Malgré l’effort de systématisation déployé par l’agence internationale, l’articulation entre observatoires et action publique territoriale reste très variée. Deux facteurs influent conjointement sur cette articulation et sur la façon dont l’appropriation des indicateurs et méthodologies de l’agence se fait : la taille et les moyens de l’observatoire, et le rôle qu’il joue dans la gouvernance urbaine. Nous nous appuyons sur des entretiens avec des acteurs de ces observatoires, la participation à des réunions organisées par la commission économique et sociale d’Asie de l’Ouest (UN-ESCWA) autour des observatoires urbains en présence de représentants de ces observatoires et d’UN-HABITAT, ainsi qu’une revue de la documentation produite par tous ces acteurs. On distingue trois situations. On voit, d’abord, les petits observatoires n’ayant pas les moyens de produire tous les indicateurs d’UN-HABITAT, comme celui de Sin-El-Fil dans les banlieues de Beyrouth, bricoler leurs propres indicateurs et méthodologies pour répondre plus directement et avec leurs ressources aux priorités des municipalités dont ils dépendent. Ceci est aussi le cas d’observatoires mis en place dans une perspective de renforcement des capacités managériales des acteurs dans un contexte de construction de politiques ou de projets stratégiques métropolitains, comme à Amman, Alep et Tripoli. Ces observatoires, tout en récupérant certains indicateurs de la liste d’UN-HABITAT, se focalisent sur les indicateurs qui permettraient d’avancer sur les questions stratégiques qui les préoccupent et d’ouvrir la discussion entre les partenaires. Par contre, d’autres observatoires, comme ceux de Jeddah et de Medina, reprennent largement les indicateurs d’UN-HABITAT. Cependant, ces observatoires, bien que très bien dotés financièrement et en ressources humaines, jouent surtout le rôle de « vitrines » de modernité pour les administrateurs de ces villes, mais n’influent que marginalement sur l’espace de prise de décision. [less ▲]

Detailed reference viewed: 21 (2 ULg)
Peer Reviewed
See detailL'"efficacité paradoxale" de la médiation esthétique
Servais, Christine ULg

Conference (2013, October 17)

Il s’agit ici de montrer que le concept de médiation a une portée critique, qu’il s’agit d’un concept propre à séparer, à distinguer, à révéler des enjeux politiques, qu’il n’est pas seulement propre à ... [more ▼]

Il s’agit ici de montrer que le concept de médiation a une portée critique, qu’il s’agit d’un concept propre à séparer, à distinguer, à révéler des enjeux politiques, qu’il n’est pas seulement propre à décrire des pratiques, mais également à les interroger. Le concept de médiation a une portée critique dès lors qu’il questionne le rapport entre communication et politique, notamment à travers la question des normes communes, du “sens commun”, de la transmission, du rôle du conflit, etc. En partant de l’approche de Lamizet, qui conçoit la médiation comme ce qui prend en charge et opère une relation singulier/collectif, je propose d’envisager non pas ce qui s’interpose (dispositifs, médiateurs) entre l’oeuvre et le public, mais bien la relation que le public établit avec l’oeuvre et les dispositifs, en considérant que ceux-ci font médiation, c’est-à-dire inscrivent l’individu dans une forme de communauté. A travers cette conception d’une “médiation esthétique”, on peut réintroduire la notion de médiation culturelle telle qu’elle est comprise par la plupart des auteurs (comme “transformation”, Davallon, 2003, comme “recherche infinie de significations”, Darras, 2003) dans sa dimension non seulement critique mais également politique. Cette approche de la médiation suppose qu’on la décrive en des termes qui permettent de la mettre en relation tant avec l’émancipation (Rancière, 2000, 2008) qu’avec l’aliénation ou la contrainte. Nous verrons alors qu’il faut la décrire comme mésentente (Rancière, 1995), malentendu (Derrida 1990) ou désynchronisation (Stiegler, 2003), c’est-à-dire : “incalculable” (Derrida), asymétrique, et fondée sur la possibilité de l’échec, ce que Rancière appelle l’ “efficacité paradoxale” des oeuvres. [less ▲]

Detailed reference viewed: 20 (0 ULg)
Full Text
Peer Reviewed
See detailDevelopment of a quantitative approach based on surface-enhanced Raman chemical imaging (SER-CI)
De Bleye, Charlotte ULg; Sacre, Pierre-Yves ULg; Dumont, Elodie ULg et al

Conference (2013, October 17)

During the last decade, Raman imaging has taken an important place in the pharmaceutical field [1-2]. It enables to acquire a visual representation of samples while quantifying and identifying molecules ... [more ▼]

During the last decade, Raman imaging has taken an important place in the pharmaceutical field [1-2]. It enables to acquire a visual representation of samples while quantifying and identifying molecules of these samples. However, this technique suffers from a lack of sensitivity and the appearance of fluorescence which can limit its pharmaceutical applications. One way to circumvent these limitations is Surface Enhanced Raman chemical imaging (SER-CI) which presents the advantages of Raman imaging and enables to dramatically increase the Raman scattering of molecules adsorbed or very close to metallic surfaces [3]. The number of publications regarding SER-CI in the pharmaceutical field is very limited probably due to the well-known stability and reproducibility problem of SERS and also due to the difficulty to obtain a homogeneous colloids covering of samples surface before SER-CI analyses. In this context, the possibility to develop a quantitative approach using SER-CI on a pharmaceutical model, presented as paracetamol tablet, was studied. The aim was to develop a SER-CI method enabling to quantify 4-aminophenol (4-AP), which is the main impurity of paracetamol actively research for its toxicity, at a concentration below its limit of specification of 1000 ppm [4]. This pharmaceutical model was first investigated using SERS and a quantitative method enabling to quantify 4-AP from 3 to 15 µg mL-1 was developed and validated [5]. Based on these previous results, the possibility to develop quantitative approach to quantify 4-aminophenol in paracetamol tablet using SER-CI was investigated. Different ways to cover the tablets surface by silver colloids were tested and a homogeneity study was performed in order to improve the repeatability of SER-CI analyses. Afterwards, the SER-CI approach was optimized and different spectral intensity normalizations were tested. Finally, a quantitative approach using SER-CI was developed enabling to quantify 4-AP from 0.025% to 0.2% (w/w) in paracetamol tablets. [less ▲]

Detailed reference viewed: 34 (7 ULg)
Full Text
Peer Reviewed
See detailEVALUATION OF α-SYNUCLEIN AS BIOMARKER OF PARKINSON'S DISEASE
Napp, Aurore ULg; Garraux, Gaëtan ULg; Servais, Anne-Catherine ULg et al

Conference (2013, October 17)

Detailed reference viewed: 18 (6 ULg)
Peer Reviewed
See detailExpérimentations manuscrites : lettres, albums et livres d’or
Saint-Amand, Denis ULg

Conference (2013, October 16)

Detailed reference viewed: 12 (0 ULg)
Full Text
See detailUtilisation des drones comme outil de suivi de travaux de restauration : génération de séries temporelles d'orthomosaïques à très haute résolution et de modèles numériques de surface
Michez, Adrien ULg; Lisein, Jonathan ULg; Geerts, Cédric ULg et al

Poster (2013, October 15)

D'une invention initialement militaire, les drones - et les applications qui dérivent de leurs utilisation - tendent à se banaliser au sein du domaine civil. En terme d'applications géographiques, les ... [more ▼]

D'une invention initialement militaire, les drones - et les applications qui dérivent de leurs utilisation - tendent à se banaliser au sein du domaine civil. En terme d'applications géographiques, les micro-drones (< 2 kg) occupent un segment nouveau dans les techniques d’acquisition d'informations, à mi-chemin entre deux segments plus classiques, représentés par les techniques d'acquisitions « terrain » (LiDAR terrestre, lever topographique, cartographie GPS, ..) et l'imagerie aérienne (caméra métrique, LiDAR aérien, imagerie satellitale). A l'aide d'un micro-drone X100 (Gatewing-Trimble), l'Unité GRFMN a effectué différents survols du projet de restauration du ruisseau du Morby, entrepris dans le cadre du projet Life+ Walphy. Les survols ont permis la réalisation d'orthomosaïques et de MNS (à l'aide d'Agisoft Photoscan) aux différentes étapes du chantier. Une évaluation de la qualité des MNS photogrammétriques générés est réalisée sur base de données LiDAR aérien disponible sur la zone. Une comparaison des coûts sera également réalisée entre les différentes techniques d'acquisition de données topographiques déployées sur le site lors du projet : MNS photogrammétriques UAV et caméra large format, LiDAR aérien. [less ▲]

Detailed reference viewed: 85 (35 ULg)
Full Text
See detailCaractérisation de la couche active et du débit solide dans les rivières à charge caillouteuse du massif ardennais
Levecq, Yannick ULg; Houbrechts, Geoffrey ULg; Van Campenhout, Jean ULg et al

Poster (2013, October 15)

Plusieurs techniques existent pour calculer l’épaisseur de la couche active de charriage et le débit solide des rivières. Il peut s’agir de chaînes d’érosion, de pièges à sédiments, d’échantillonneurs de ... [more ▼]

Plusieurs techniques existent pour calculer l’épaisseur de la couche active de charriage et le débit solide des rivières. Il peut s’agir de chaînes d’érosion, de pièges à sédiments, d’échantillonneurs de charge de fond de type Helley-smith, de galets marqués, ou encore du dépouillement d’archives de curages (Houbrechts et al., 2012). Ces techniques permettent également de déterminer l’impact de travaux d’aménagements ou de restauration de cours d’eau. Dans le cadre de conventions de recherches financées par la DCENN, deux techniques complémentaires ont été utilisées afin d’analyser le transport de charge de fond de rivières de Wallonie. Tout d’abord des chaînes d’érosion ont été implantées en travers du fond du lit, elles permettent de calculer l’épaisseur et la section de la couche de sédiments mobilisés lors des crues. Les puissances spécifiques des crues analysées varient entre 15 et 195 W/m² et ont généré une épaisseur de couche active comprise entre 9 et 80 mm. Ensuite, la distance parcourue par la charge de fond durant des crues mobilisatrices a été estimée à l’aide de galets marqués par des transpondeurs passifs (PIT-tags). Selon l’importance des crues, les distances moyennes de transport observées sont comprises entre 4 et 297 m. En croisant les données obtenues à l’aide de ces deux techniques, le débit solide de charge de fond a également pu être estimé. A titre d’exemple, le débit solide des rivières varie entre 0,02 t.km-2/crue et 2 t.km-2/crue, lorsque la rupture de la couche d’armurage se produit. [less ▲]

Detailed reference viewed: 26 (5 ULg)
Full Text
See detailFlux des sédiments en suspension dans les rivières du bassin de la Meuse : proposition d'une typologie régionale basée sur la dénudation spécifique des bassins versants
Van Campenhout, Jean ULg; Hallot, Eric ULg; Houbrechts, Geoffrey ULg et al

Poster (2013, October 15)

L'érosion des sols peut être appréhendée à l'échelle du bassin versant en quantifiant le transport sédimentaire en suspension à son exutoire. Environ 2.000 mesures de concentration des matières en ... [more ▼]

L'érosion des sols peut être appréhendée à l'échelle du bassin versant en quantifiant le transport sédimentaire en suspension à son exutoire. Environ 2.000 mesures de concentration des matières en suspension ont permis d'estimer les débits solides annuels en fonction des débits liquides observés dans ces cours d'eau. Une méthodologie simple a été mise en place et appliquée à un réseau de 80 stations, à l’exutoire de bassins versants d’une superficie comprise entre 16 et 2.900 km² situées en région wallonne. Des différenciations régionales ont pu être mises en évidence en fonction du substrat et de l'occupation du sol des bassins versants. La granulométrie des particules transportées et la proportion de matière organique complètent l'analyse et confirment les différenciations observées selon les régions agro-géographiques. L’impact de la fréquence d’échantillonnage (et de sa synchronisation avec les débits de crue) sur l’estimation de la dénudation annuelle a été mis en évidence, ainsi que la grande variabilité interannuelle, qui est fonction de l’intensité et de la hauteur des précipitations. L’érosion des sols est ainsi très sensible aux événements extrêmes. Par ailleurs, l’intérêt de longues campagnes de mesures est souligné. Des données issues de travaux antérieurs ont également été intégrées à la base de données. Son interprétation a permis de définir les meilleurs sites susceptibles d’accueillir à long terme un réseau de mesure en continu de la concentration des matières en suspension en Wallonie. [less ▲]

Detailed reference viewed: 27 (10 ULg)
See detailLe plomb dans les traités d’architecture français des Temps Modernes
Gilles, Isabelle ULg

Conference (2013, October 15)

Detailed reference viewed: 14 (0 ULg)
Full Text
See detailCharacterisation of sand transport in gravel-bed rivers using iron slag dated by historical studies
Houbrechts, Geoffrey ULg; Levecq, Yannick ULg; Petit, François ULg

Poster (2013, October 15)

De grandes quantités de scories sidérurgiques sont présentes dans les sédiments des rivières ardennaises. Ces éléments proviennent de centaines d’établissements établis le long des cours d’eau entre le ... [more ▼]

De grandes quantités de scories sidérurgiques sont présentes dans les sédiments des rivières ardennaises. Ces éléments proviennent de centaines d’établissements établis le long des cours d’eau entre le 14ème et le 19ème siècle. Lors de l’exploitation, ces déchets étaient rejetés à proximité des sites sidérurgiques, voire directement déversés dans les cours d’eau. Cela signifie que depuis plusieurs siècles, de grandes quantités de scories de taille variée, se sont mélangées aux alluvions naturelles. Leur couleur et leur éclat les différencient aisément des éléments naturels. Les lieux et périodes d’exploitations sont connus précisément grâce à de nombreuses sources historiques, ce qui rend les scories particulièrement utiles comme marqueurs du déplacement des sédiments dans les cours d’eau (Houbrechts et al., 2011). Dans plusieurs rivières du massif ardennais, des échantillons de sédiments sableux ont été prélevés en aval d’anciens sites métallurgiques. La concentration en scories a été mesurée dans la fraction des sables grossiers (1680 – 2360 µm). La dispersion longitudinale des scories permet d’estimer la vitesse d’avancée des alluvions sableuses. Les sables grossiers constituent une part importante des sédiments transportés dans le fond du lit des cours d’eau. En effet, le suivi d’un piège à sédiment dans un cours d’eau ardennais (la Chavanne) à montré qu’ils représentent plus de 90 % de la charge solide transportée sur le fond des rivières. La présence de scories dans le lit des cours d’eau permet également d’estimer l’épaisseur de la couche active de charriage durant les derniers siècles. [less ▲]

Detailed reference viewed: 28 (13 ULg)
See detailColard Mansion, passeur de textes
Adam, Renaud ULg

Conference (2013, October 14)

Detailed reference viewed: 20 (2 ULg)
Full Text
See detailFood intake of Tibetan children living in Kashin Beck disease endemic areas in Central Tibet
Rooze, Shancy; de Voghel, Pauline; Mathieu, Françoise et al

Conference (2013, October 14)

Introduction: Kashin-Beck disease (KBD) is a bone and joint pathology. KBD begins during childhood, causes deformities, pain, lack of mobility, and short stature. The pathophysiology of the disease is ... [more ▼]

Introduction: Kashin-Beck disease (KBD) is a bone and joint pathology. KBD begins during childhood, causes deformities, pain, lack of mobility, and short stature. The pathophysiology of the disease is unknown. Nutrition possibly plays a role. Children living in KBD endemic areas in Central Tibet present severe growth retardation, signs of chronic malnutrition and a high prevalence of rickets. A food consumption study was conducted. We have focused our attention on total energy intake, calcium, phosphorus and vitamin D. Material and methods: Prospective food intake measurements have been performed. The investigation concerned children from 9 to 16 years old living in KBD endemic areas. All food and drinks have been measured during several days at the 4 seasons of the year. Anthropometric data were obtained. Results: 30,5% of the children presented with stunting (height for age ratio below -2 z score); 13,8% of the cohort suffered from acute malnutrition (body mass index below -2 z score). Mean total energy intake was 87% of the recommended value. Calcium and vitamin D intakes never covered the needs (44 % and 14 %, respectively). Phosphorus intake was high. Mean Ca / P ratio was 0.54. Conclusion: Calcium and vitamin D deficiency may play a role in the etiology of bone and joint diseases in this population. To improve the nutritional status of the children, a large program of calcium and vitamin D supplementation among 0 - 5 years old children living in KDB endemic areas was started. Besides, chemical analyses of locally grown foods are performed, in order to have a more precise evaluation of nutrient intake. In the future, the effect of increased energy intakes will be evaluated. [less ▲]

Detailed reference viewed: 8 (0 ULg)
Full Text
See detailNeonatal Group B Streptococcal Infections: Overview and Prevention Strategies
MELIN, Pierrette ULg

Conference (2013, October 13)

Emerging abruptly in the 1970s as an important life-threatening pathogen in neonates causing severe invasive bacterial infections, Streptococcus agalactiae or group B streptococcus (GBS) has become a ... [more ▼]

Emerging abruptly in the 1970s as an important life-threatening pathogen in neonates causing severe invasive bacterial infections, Streptococcus agalactiae or group B streptococcus (GBS) has become a notable global problem. Today it remains the leading cause of neonatal sepsis and meningitis, early onset and late onset diseases (EOD, LOD). From the 1990s to the present, where guidelines for prevention of perinatal GBS disease have been widely implemented, the incidence of EOD has dramatically decreased to <0.5 cases per 1,000 live births but has not been eradicated. Selective intravenous antimicrobial prophylaxis with β-lactams administered during labor and delivery to women who are colonized by GBS appears to be the most practical and effective mode of prevention of GBS EOD at this time. There are different prevention strategies at this time, screening-based or risk-based, but none are 100% effective in the eradication of neonatal GBS EOD and there are no preventive strategies for LOD. In spite of the great progress that has been made, GBS EOD continues to occur and the GBS burden remains a significant public health issue. Extended efforts to improve screening for GBS status continue to be important and may be able to take advantage of new rapid diagnostic technologies. Given challenges, limitations and potential complications of maternal intrapartum prophylaxis, a new approach is still needed. Maternal immunization against GBS is an attractive alternative for the prevention of not only EOD and LOD but also stillbirths and maternal diseases. Development of a group B streptococcal vaccine is the most promising approach for the prevention of severe GBS neonatal disease through transplacental delivery of antibodies directly from immunized mothers. It may likely become the most effective and sustainable long-term preventive strategy. [less ▲]

Detailed reference viewed: 18 (0 ULg)
Peer Reviewed
See detailL'identité, la maladie et la dynamique du temps à l'adolescence
Gauthier, Jean-Marie ULg

Conference (2013, October 12)

Detailed reference viewed: 22 (0 ULg)
Peer Reviewed
See detailTechnology Assessment and neoliberal policies as dancing partners : critical insights in the new spirit of Technology Assessment
Delvenne, Pierre ULg

Conference (2013, October 11)

In this paper we explore the tension surrounding two interrelated sets of science, technology and innovation (STI) policies that evolved together in Europe since the 1980s onward. On the one hand, we ... [more ▼]

In this paper we explore the tension surrounding two interrelated sets of science, technology and innovation (STI) policies that evolved together in Europe since the 1980s onward. On the one hand, we focus on the expanding process of neoliberal policies unconditionally supporting STI as strategic resources to generate growth and competitiveness. On the other hand, we link this process with policy decisions to institutionalize Technology Assessment processes and activities to frame and anticipate the potential side effects of STI in newly emerging strategic science regimes. TA and neoliberal STI policies coevolved as “dancing partners” (Rip 1992), relatively independent and closely interacting at the same time. We inquire into the experimental, transforming character of Technology Assessment (TA) by linking its emergence and development to the broader institutional setting of which it is a part. Our analysis brings a macro-sociological and political sensitivity to bear on TA. Rather than conceiving of TA as a mere management tool or governance technique, we suggest that TA processes enact, as well as counteract, dominant innovation policies. Conversely, we look at recent TA de-institutionalization processes in Flanders and Denmark to offer some reflections on the future of TA. Based on our previous researches and on participatory observation in a European FP7 project aimed at expanding TA institutions in Europe, we question TA’s ability to exert its critical capacities if it is to survive only as an instrument aligned with recent policy discourses, such as responsible research and innovation, that emerged in the aftermath of Lisbon’s strategy. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailEnvironment factors affecting racing performances of Thoroughbred horses in Algeria
Tennah, Safia ULg; Kafidi, Nacereddine; Antoine-Moussiaux, Nicolas ULg et al

Poster (2013, October 11)

The results of the flat races organized in Algeria from 1995 to 2007 by the Algerian Horse Racing Society were used to estimate non-genetic parameters of racing performances of Thoroughbred horses ... [more ▼]

The results of the flat races organized in Algeria from 1995 to 2007 by the Algerian Horse Racing Society were used to estimate non-genetic parameters of racing performances of Thoroughbred horses. Performances were assessed through two earnings traits (the logarithm of annual virtual earnings: LAEV and the logarithm of average annual virtual earnings per start: LAEV/S) and a normalized ranking (PERF). The phenotypic correlations between these traits were calculated, in order to deduce what is common and what is specific to each measure. The environment factors that were investigated are age (3 to 8 years and older), sex (male or female), year of race (1995 to 2007) and the interactions between these factors. The General Linear Model (GLM) procedure from SAS software was used to identify and quantify the non-genetic factors affecting racing performances. The results showed significantly high positive correlations (p<0.001) between the three traits, hence considered as accounting for similar aptitudes. The effects of age (with a plateau between 4 and 5 years) and year (with an increasing trend for more recent years) turned out to be significant (p<0.001) for the three traits, the sex effect was only significant for the PERF trait (with better performances for males than females) and an interaction between the age and year of the performance was the only significant interaction (p<0.05) for the LAEV trait. The significant effects of these non-genetic factors indicate the need to adjust the earnings and ranks in the context of a program for genetic improvement of Thoroughbred horses in Algeria. [less ▲]

Detailed reference viewed: 10 (1 ULg)
Full Text
See detailGrowth performance and meat quality of stress negative Piétrain pigs in the tropics: the case of Vietnam
Ha Xuan, Bo; Do Duc, Luc ULg; Moula, Nassim ULg et al

Poster (2013, October 11)

This study was carried out at the animal farm of Hanoi University of Agriculture, Vietnam to evaluate the growth performance and meat quality of stress negative Piétrain pigs. The study concerns the body ... [more ▼]

This study was carried out at the animal farm of Hanoi University of Agriculture, Vietnam to evaluate the growth performance and meat quality of stress negative Piétrain pigs. The study concerns the body weight (BW) of 116 pigs at 7.5 months of age and the ultrasound measurements on 83 live animals in order to determine backfat thickness, longissimus muscle depth and lean meat percentage (LM). Meat color (C.I.E L*, a* and b*), peak shear force (SF), pH at 24h (pH24) and at 45 minutes (pH45) post mortem were measured on 31 meat samples. Meat chemical composition (dry matter, protein, lipids and ash) was determined on 23 meat samples. All the data were analyzed according to a linear fixed model including gender effect (female and intact males) and Halothane genotype (CC and CT). The interaction between gender and genotype was not observed and therefore it was ignored from the final model. The results show that BW and LM were not significantly different between genotypes (P>0.21) while females were heavier than males (101.11 vs. 93.85 kg, P=0.0011). LM of female and male were respectively 63.27 and 63.56%. Gender and genotype didn’t affect meat quality and chemical composition (P>0.05) except pH24 (P=0.0011), a* (P<0.0001) and lipids (P=0.0012) for gender effect. The pH45 (6.50 and 6.45 for females and males) and pH24 (5.34 and 5.49 for females and males) were in the range corresponding to a normal meat. The obtained results show that stress negative Piétrain pigs have high lean meat percentage and satisfactory meat quality under tropical climatic conditions in Vietnam. [less ▲]

Detailed reference viewed: 19 (5 ULg)
Peer Reviewed
See detailHow many scribes worked on the Egyptian Recension of the Thouand and One Nights?...
Franssen, Elise ULg

Conference (2013, October 11)

Detailed reference viewed: 10 (1 ULg)
Full Text
See detailCaractérisation de la race ovine Tazegzawth en Algerie: description morpho-biométrique et détermination d’une formule barymétrique
Moula, Nassim ULg; Philippe, François-Xavier ULg; Do Duc, Luc ULg et al

Poster (2013, October 11)

Le mouton Azegzaw est de robe blanche avec des taches noires à reflets bleuâtres sur le chanfrein, le pourtour des yeux et le lobe des oreilles. Non répertoriée par le standard des races ovines ... [more ▼]

Le mouton Azegzaw est de robe blanche avec des taches noires à reflets bleuâtres sur le chanfrein, le pourtour des yeux et le lobe des oreilles. Non répertoriée par le standard des races ovines algériennes, cette race présente pourtant des qualités intéressantes d'adaptation aux régions montagneuses de Kabylie, ce qui justifie la mise en œuvre d’un programme de conservation de ce patrimoine génétique original. L’objectif de cette étude, est (1) de caractériser la morpho-biométrie de moutons de race Tazegzawth et (2) de déterminer des équations barymétriques destinées à l’estimation du poids vif (PV) au départ des mensurations corporelles (périmètre thoracique: PT ; longueur du corps: LDC ; hauteur au garrot : HG ; hauteur à la croupe : HC). Au total, 89 sujets adultes (12 mâles, 77 femelles) sont concernés par cette étude. Les mensurations corporelles moyennes observées sont : - PV: 41,53±0,53 kg (mâle: 46,71kg et femelle: 40,72kg) ; - PT: 73,52±0,45 cm (mâle: 78,37cm et femelle: 72,77cm) ; - LDC: 89,10±0,44 cm (mâle: 93,82cm et femelle: 88,37cm) ; - HG: 71,40±0,43 cm (mâle: 76,06cm et femelle: 70,68cm); - HC: 70,14±0,42 (mâle: 74,80cm cm et femelle: 69,42). Les formules retenues pour l’estimation du PV sont: - Tous sexes confondus : PV=-0,025 HG2 + 4,78HG-169,88 (R2=0,87) - Femelles : PV = -0,038HG2 +6,58HG-232,39 (R2=0,84) - Mâles : PV = -0,16LDC2+0,21 HC2+284,92 (R2=0,99) En dépit de l’échantillon réduit dans l’étude, celui-ci a révélé des caractéristiques relativement homogènes. La détermination d’une formule barymétrique pourra venir en soutien d’une sélection incluant un objectif de croissance. [less ▲]

Detailed reference viewed: 95 (20 ULg)
Peer Reviewed
See detailGenetic parameters of racing performance traits of Arabian horses in Algeria
Tennah, Safia ULg; Kafidi, Nacereddine; Antoine-Moussiaux, Nicolas ULg et al

Poster (2013, October 11)

The data used in the present study were recorded at the Algerian Horse Racing Society for 36492 racing performance of 913 Arabian horses from 1995 to 2007. The aim of the study was to identify the genetic ... [more ▼]

The data used in the present study were recorded at the Algerian Horse Racing Society for 36492 racing performance of 913 Arabian horses from 1995 to 2007. The aim of the study was to identify the genetic parameters underlying three traits: two earnings traits, namely the logarithm of average annual virtual earnings (LAEV) and the logarithm of average annual virtual earnings per start (LAEV/S), and a ranking trait, the normalized ranking (PERF). To identify the fixed effects to be included in the genetic mixed model, a preliminary analysis was conducted using the General Linear Models (GLM) procedure from SAS software. The effects of age, sex, year and the interaction between year of the race and age and between sex and age were included in the model for the three traits. Afterwards, two random effects, a direct genetic effect of the animal and a permanent environmental effect were included in the mixed model. The variance components and genetic parameters were estimated using the restricted maximum likelihood (REML) procedure with the MTDFREML program. The analyses with this repeatable animal model led to the following estimation of the genetic parameters: for LAEV, heritability was 0.225 (±0.041), while estimate of repeatability was 0.330 (±0.040). For LAEV/S, heritability was 0.164 (±0.027), while estimate of repeatability was 0.215 (±0.022). The heritability for the normalized ranking was higher, 0.369 (±0.054), indicating that this trait might provide faster progress for breeding programs of Arabian horses in Algeria. The repeatability estimate for the normalized ranking was 0.587 (±0.045). The genetic correlation between LAEV and LAEV/S was 0.99, revealing a almost complete genetic dependence between these two traits, 0.69 between PERF and LAEV and 0.79 between PERF and LAEV/S. [less ▲]

Detailed reference viewed: 13 (0 ULg)
Full Text
See detailAnalyse de l'efficience des traitements de mammites de 50 fermes de Wallonie dans la base LAECEA
Theron, Léonard ULg; Reding, Edouard; Detilleux, Johann ULg et al

Conference (2013, October 11)

Mastitis is the most “antibiotic consuming” pathology in dairy medicine. Though antibiotics and antibiograms are known to vets since the early fifties, our practices did not evolved a lot from empiric ... [more ▼]

Mastitis is the most “antibiotic consuming” pathology in dairy medicine. Though antibiotics and antibiograms are known to vets since the early fifties, our practices did not evolved a lot from empiric antibiotic therapy. Indeed, the need for a treatment, the cost and the delay for an antibiogram are most of the time incoherent with a routine practice. Nevertheless, there is a surge for rational use of antibiotics. Our study was based on 1100 mastitis events from 30 Belgian farms collected between January 2011 and June 2012. We chose to compare tissular cure (TC) based on the threshold of 200.000 somatic cells/ml in milk at milk control at least 60 days after the clinical mastitis event. Regarding the mastitis event, severity (according 3 grades: alteration of milk as grade 1, alteration of quarter as grade 2 and alteration of general state as grade 3), quarter, treatments were recorded. We also assessed a chronicity status based on previous somatic cell count (SCC) of the cow. It was considered a new case a cow which at least 15 days before had an SCC <200.000 cells/ml, other were marked as chronic cases. In our distribution, we see a seasonal rise of incidence between January and May. This period would represent twice as many mastitis as the summer period. Overall TC reaches 46% of all mastitis events, which is quite poor. Rear quarters had significantly lower TC (p<0,05%). Grade 3 mastitis had lower TC, 42,6% (p<0.05%) versus 48,9 % for grade 2 and 44,2% for grade 1. Almost 49% of all mastitis was considered as chronic cases, which TC was 33% on average, whereas new cases reached 55,3% TC. Study of treatment was frustrating given the high number of different combinations of treatments. It was underlined that 4th generation cephalosporins (C4G) were the most used in our cohort, followed by aminopenicillin/methicillin association (PENA/PENM) and 1st generation cephalosporins/aminoglycosids (C1G/AG) association. Of these intramammary treatments, 20% of the cases were submitted to a second intramammary drug, mostly C1G or C1G/AG. One third of the cases were treated parenterally with antimicrobials, mostly macrolids, fluoroquinolones and penethacillin. Finally, 10% of mastitis was treated with anti-inflammatory drugs, mostly tolfenamic acid and flunixin-meglumin. Comparing mastitis without use of a secondary intramammary drug, only PENA and C1G/AG reached more than 60% TC. Considering new cases, then C1G/AG, PENA/PENM and Prednisolone containing specialties were above 60% TC. Use of a parenteral injections increased TC only on new cases (+12%), but not on chronic cases. Refining by severity, TC improved with a parenteral on new cases, mainly in grade 1 (+20%). Regarding associated factors, TC was negatively affected by chronicity, parity and lactation stage. Indeed, TC was lower on cases from more than 4 month in milk, third lactation (OR = 2.8 for no cure) compared with previous, and chronic cases (OR=2,6). Seemingly, chronicity was positively associated with parity and season. The 3rd parity cases had higher chances to be chronic ones (OR = 1,7), as well as cases from April to September (OR = 1,6). This evaluation of cure is rather simple and has a good variability which allows several questions about the real match between antimicrobial treatment for mastitis and the udder inflammation. Based on our epidemiological data, we can modify routine management of mastitis, as some cases might not worth the antimicrobial treatment. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
See detailVitrification of immature equine oocytes
Gatez, Carine ULg; Ectors, Fabien ULg; Farnir, Frédéric ULg et al

Poster (2013, October 11)

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailA splice-acceptor site variant in the bovine PIGH gene causes glycosylphosphatidyl inositol deficiency and lethal arthrogryposis syndrome.
Sartelet, Arnaud ULg; Li, Wanbo; Pailhoux Eric et al

in Bayrou, Calixte; Cabaraux, Jean-François; Delguste, Catherine (Eds.) et al Proccedings of the 3rd Scientific Meetingof the Faculty of Veterinary Medecine (2013, October 11)

Detailed reference viewed: 15 (5 ULg)
Full Text
See detailMOLECULAR CHARACTERIZATION OF CLOSTRIDIUM DIFFICILE STRAINS FROM ELDERLY CARE HOME RESIDENTS
Rodriguez Diaz, Cristina ULg

Poster (2013, October 11)

Clostridium difficile is the primary cause of nosocomial diarrhoea and pseudomembranous colitis after use of antibiotics. Production of toxins A and B are the main virulence factors responsible for its ... [more ▼]

Clostridium difficile is the primary cause of nosocomial diarrhoea and pseudomembranous colitis after use of antibiotics. Production of toxins A and B are the main virulence factors responsible for its pathogenicity. Increasing age, several co-morbidities, environmental contamination, antibiotic exposure and other intestinal perturbations appear to be the greatest risk factors for C. difficile infection (CDI). Therefore, elderly care home residents are considered particularly vulnerable to CDI. The aim of this study was to evaluate and follow the prevalence of C. difficile in a Belgian nursing home and to characterize the C. difficile strains isolated from faeces of elderly care home residents. [less ▲]

Detailed reference viewed: 12 (5 ULg)
Peer Reviewed
See detailAutograph/Holograph and Authorial Manuscripts: Concluding Remarks
Bauden, Frédéric ULg; Franssen, Elise ULg

Conference (2013, October 11)

Detailed reference viewed: 11 (0 ULg)
Full Text
See detailEvaluation of some production parameters in Kabyle local rabbit population
Moula, Nassim ULg; Michaux, Charles ULg; Do Duc, Luc ULg et al

Poster (2013, October 11)

In Algeria, the rabbit production is mainly based on local population to ensure a cheap supply of urban markets proteins. This sector may represent an important source of protein which is in large deficit ... [more ▼]

In Algeria, the rabbit production is mainly based on local population to ensure a cheap supply of urban markets proteins. This sector may represent an important source of protein which is in large deficit in the country. The rabbit production can be justified by its advantages such as short life cycle and high prolificacy. The objective of the present study is to evaluate production performances of Kabyle local rabbit population. Litter size, growth rate, body slaughter weight, feed conversion ratio and mortality rate are considered. The experiment was carried out on 30 animals (6 males and 24 females) for reproduction in the Ath Waghlis region (north-east Algeria). Rabbits have been raised in pens with 1 male and 4 females per pen. The commercial feed was supplied ad libitum to animals. Results reported shown that total number of rabbits born, number born alive, number to weaned, slaughter weight at 84 days of age, feed conversion ratio (from weaning to slaughter) and survival rate (from birth to slaughter) were 7.1, 6.1, 5.3 rabbits, 1.90kg, 3.16 and 73% respectively. The performances of the Kabyle breed could be improved by purebred selection as well as by crossing with exotic breeds. [less ▲]

Detailed reference viewed: 33 (11 ULg)
Full Text
Peer Reviewed
See detailDevelopment of Astrocytes in the Sheep Cerebellum
Salouci, Moustafa ULg; Antoine, Nadine; Shikh Al Sook, Mohamad Khir ULg et al

Poster (2013, October 11)

Detailed reference viewed: 63 (46 ULg)
Full Text
See detailEvaluation morphométrique des chevaux pur-sang Arabe en Algérie: mensurations corporelles et proposition d’équations barymétriques
Tennah, Safia ULg; Kafidi, N; Antoine-Moussiaux, Nicolas ULg et al

Poster (2013, October 11)

Cette étude vise à la caractérisation morphobiométrique des chevaux de course pur-sang arabe et à l’estimation d’équations barymétriques adaptées à cette race. La caractérisation a concerné 98 chevaux ... [more ▼]

Cette étude vise à la caractérisation morphobiométrique des chevaux de course pur-sang arabe et à l’estimation d’équations barymétriques adaptées à cette race. La caractérisation a concerné 98 chevaux, dont 44 femelles et 54 mâles, tous âgés de trois ans et plus, auprès de 77 propriétaires-éleveurs dans 3 hippodromes d’Algérie (Zemmouri, Tiaret et Caroubier). Dix-neuf mensurations étaient relevées ainsi que le poids vif (PV). Le poids moyen est de 456,2 +/- 43,0 kg, variant de 335 kg à 545 kg. La sélection des variables à inclure dans les équations barymétriques a été réalisée à l’aide de la procédure stepwise du SAS. Quatre mensurations parmi les 19 réalisées ont été retenues pour la proposition d’équations d’estimation du poids vif des chevaux : le périmètre thoracique (PT), la hauteur à la croupe (HC), la longueur de l’encolure (LE) et le tour de l’encolure (TE). Ainsi, les équations proposées pour les mâles et pour les femelles sont respectivement de : PV= 7,024*PT - 787,119 (R²=0,99); PV=6,207*PT + 0,633*HC + 0,668*TE - 0,878*LE - 746,370 (R²=0,96). Les résultats de cette étude devraient permettre aux propriétaires-éleveurs et entraineurs de suivre aisément le poids de leurs chevaux. Ce suivi est nécessaire pour adapter l’activité et l’alimentation des chevaux et favoriser leur performance en course. [less ▲]

Detailed reference viewed: 19 (3 ULg)
Full Text
Peer Reviewed
See detailBacterial diversity and its evolution during storage of fresh beef from different origins under different atmosphere and temperature conditions
Didimo Imazaki, Pedro Henrique ULg; Tahiri, Assia ULg; Taminiau, Bernard ULg et al

Poster (2013, October 11)

The purpose of this study was to evaluate the bacterial diversity and its evolution during storage of fresh beef, depending on its origin, packaging and storage temperature. Two batches of three vacuum ... [more ▼]

The purpose of this study was to evaluate the bacterial diversity and its evolution during storage of fresh beef, depending on its origin, packaging and storage temperature. Two batches of three vacuum packed striploins from United Kingdom and Belgium were obtained from a food wholesaler located in the Walloon Region. Fifteen days after slaughter, the striploins were sliced and individually kept under vacuum for 30 days: i) at −1 °C; ii) at +4 °C and iii) at −1 °C for 15 days and then at +4 °C for 15 days. The bacterial diversity was evaluated by metagenomic approach 15, 30 and 45 days after slaughter. Furthermore, each 15 days part of the vacuum packed striploin slices were repacked under modified atmosphere (70 % O2/30 % CO2), stored at +4 °C for 2 days and at +8 °C for 5 days, and then analyzed. Metagenomic analysis revealed a selection of the initial flora depending on atmosphere and temperature conditions. The development of Lactobacillus algidus was favored in samples preserved under vacuum at −1 °C, while a predominance of Lactococcus piscium was observed for samples stored at +4 °C. Moreover, storage under modified atmosphere favored the development of Leuconostoc gasicomitatum. These microorganisms have already been isolated from beef, but no study has evaluated their role in food conservation. The next step of this study will be to isolate and characterize strains of Lactobacillus algidus from meat and to assess their bioprotective potential. [less ▲]

Detailed reference viewed: 15 (4 ULg)
Full Text
See detailLongitudinal quality of life assessment in cancer trials: should data be treated as continuous or ordinal?
Donneau, Anne-Françoise ULg; Mauer, Murielle; Coens, Corneel et al

Poster (2013, October 11)

Detailed reference viewed: 23 (3 ULg)
Peer Reviewed
See detailPedigree analysis in the Arabian horse in Algeria: estimation of inbreeding coefficient
Tennah, Safia ULg; Kafidi, Nacereddine; Antoine-Moussiaux, Nicolas ULg et al

Poster (2013, October 11)

The studbook of the Arabian horse used in this study is recognized by international authorities such as the WAHO (World Arabian Horse Organization). The pedigree file of the horses includes 1812 animals ... [more ▼]

The studbook of the Arabian horse used in this study is recognized by international authorities such as the WAHO (World Arabian Horse Organization). The pedigree file of the horses includes 1812 animals from 166 stallions (with an average of 10.11 ± 17.33 offspring) and 392 mares (with an average of 4.30 ± 3.76 offspring). The maximal pedigree depth was 18 generations. Inbreeding coefficients of horses present in our data were estimated using the software "Pedigree Viewer" and MTDFREML software on the basis of the provided pedigree. The estimation of the inbreeding coefficient for the 1812 horses showed that 1177 animals from all those present in the pedigree were consanguineous, with an inbreeding coefficients varying from 0,00002 to 0,265, with an overall mean of 0,0275 ± 0,001. The average value of the inbreeding coefficient in the population of Arabian horses in Algeria is thus relatively high. It is to be noticed that this average coefficient of inbreeding is less than the threshold established as problematic in the inbreeding literature (6%); however, 13.5% of the total population shows inbreeding coefficients above this threshold. It is therefore important to educate owners-breeders to the problems that consanguinity can generate, and to avoid as much as possible practices that increase inbreeding, such as a too intensive use of a major ancestor, the use of a too small number of breeding animals and the use of crosses between related individuals. All these measures are necessary to prevent rapid inbreeding increase, which would result in a significant loss of genetic diversity, with a medium-term potentially negative effect on racing performances and reproduction. [less ▲]

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailAutograph/Holograph and Authorial Manuscripts: A General Introduction
Bauden, Frédéric ULg; Franssen, Elise ULg

Conference (2013, October 10)

Detailed reference viewed: 10 (2 ULg)
Full Text
Peer Reviewed
See detailThe Code of conduct on invasive alien plants in Belgium: results after two years of communication with the horticultural sector
Halford, Mathieu ULg; Branquart, Etienne; Vanderhoeven, Sonia et al

Conference (2013, October 10)

In Belgium there are around 60 plant species listed as invasive (http://ias.biodiversity.be). Most of them were introduced as ornamentals. Except a few plants that have become famous invaders throughout ... [more ▼]

In Belgium there are around 60 plant species listed as invasive (http://ias.biodiversity.be). Most of them were introduced as ornamentals. Except a few plants that have become famous invaders throughout the country, the invasiveness of these ornamentals remains unknown outside the scientific audience. Due to this lack of information, the major part is still available in nurseries. In order to reduce the introductions of these plants, a Code of conduct was launched in September 2011 within the frame of the AlterIAS project (ALTERnatives to Invasive Alien Species), an ‘Information & Communication’ Life project dedicated to invasive plants and prevention in the green sector (www.alterias.be). The Code was elaborated in consultation with horticulture professionals, scientists and representatives of administrations. Five measures were approved: (1) know the list of invasive plants in Belgium; (2) stop the trade and the plantation of some invasive plants; (3) disseminate information on invasive plants; (4) promote the use of non invasive alternative plants and (5) participate in early detection of new invaders. Restrictions of use target a list of 28 species negotiated with the sector. An awareness campaign entitled “Plant different” is on progress to promote the Code among professionals and gardeners. Different communication tools are used. Social surveys were realized to assess the tools most efficient and the subsequent change of attitudes. But raising awareness on invasive plants is difficult due to different public perception. Communication should be focused on positive messages. Negative communication with alarming terms or military metaphors re-enforces the feeling of being guilty instead of encouraging concrete solutions. Thanks to constant efforts in communication, this ‘environmentally safe’ charter is attracting new partners over time. But changing people’s attitude is a long term process. The Code of conduct will require more time than two years to be widely adopted by the horticultural sector in Belgium. [less ▲]

Detailed reference viewed: 25 (1 ULg)
See detailEncapsulation de micro-algues dans un matériaux hybride alginate-silice et production de molécules à hautes valeur ajoutée
Duprez, Marie-Eve; Mirisola, A.; Rooke, Joanna et al

Poster (2013, October 10)

Les micro-algues sont des micro-organismes photosynthétiques. Leur croissance en milieu aqueux nécessite un apport lumineux (l = 400 à 700 nm) ainsi qu’un apport en carbone et en nutriments (N, P, S, etc ... [more ▼]

Les micro-algues sont des micro-organismes photosynthétiques. Leur croissance en milieu aqueux nécessite un apport lumineux (l = 400 à 700 nm) ainsi qu’un apport en carbone et en nutriments (N, P, S, etc.). Certaines souches, Dunaliella sp. par exemple, sont couramment utilisées dans le cadre de la biosynthèse de caroténoïdes[1] (b-carotène, lutéine entre autres). Quelques recherches ont montré qu’il était possible de réaliser l’extraction in situ des métabolites produits dans un réacteur biphasique (le b-carotène hydrophobe est extrait dans une phase organique biocompatible telle que le décane ou le dodécane) [2,3,4,5]. Le projet FOTOBIOMAT (subsidié par le programme Greenomat de la Région Wallonne – Belgique) a pour but de développer un nouveau type de photobioréacteur dans lequel sont mises en oeuvre les micro-algues encapsulées dans des billes constituées d’un matériau hybride. Le processus de photosynthèse est ainsi utilisé afin de convertir du CO2 en composés à haute valeur ajoutée (b-carotène p. ex.). La viabilité des micro-algues encapsulées doit être très importante (min. 6 mois). Idéalement, le b-carotène produit devrait être récupéré par une voie “propre” et ce, quasi en continu. [less ▲]

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailAsymptotic standard errors of robust estimators of ability in dichotomous item response models
Magis, David ULg

Conference (2013, October 10)

In item response theory, the classical estimators of ability are highly sensitive to response disturbances and can return strongly biased estimates of the true underlying ability level. Robust methods ... [more ▼]

In item response theory, the classical estimators of ability are highly sensitive to response disturbances and can return strongly biased estimates of the true underlying ability level. Robust methods were introduced to lessen the impact of such aberrant responses onto the estimation process. The computation of asymptotic (i.e., large sample) standard errors (ASE) for these robust estimators, however, has not been fully considered yet. This paper focuses on a broad class of robust ability estimators, de ned by an appropriate selection of the weight function and the residual measure, for which the ASE is derived from the theory of estimating equations. The maximum likelihood (ML) and the robust estimators, together with their estimated ASE, are then compared through a simulation study. It is concluded that both the estimators and their ASE perform similarly in absence of response disturbances, while the robust estimator and its estimated ASE are less biased and outperform their ML counterparts in presence of response disturbances with large impact on the item response process. [less ▲]

Detailed reference viewed: 7 (3 ULg)
Full Text
See detailEncapsulation de micro-algues dans un matériaux hybride alginate-silice et production de molécules à hautes valeur ajoutée
Duprez, Marie-Eve; Mirisola, A; Desmet, Jonathan et al

Poster (2013, October 10)

Les micro-algues sont des micro-organismes photosynthétiques. Leur croissance en milieu aqueux nécessite un apport lumineux (l = 400 à 700 nm) ainsi qu’un apport en carbone et en nutriments (N, P, S, etc ... [more ▼]

Les micro-algues sont des micro-organismes photosynthétiques. Leur croissance en milieu aqueux nécessite un apport lumineux (l = 400 à 700 nm) ainsi qu’un apport en carbone et en nutriments (N, P, S, etc.). Certaines souches, Dunaliella sp. par exemple, sont couramment utilisées dans le cadre de la biosynthèse de caroténoïdes[1] (b-carotène, lutéine entre autres). Quelques recherches ont montré qu’il était possible de réaliser l’extraction in situ des métabolites produits dans un réacteur biphasique (le b-carotène hydrophobe est extrait dans une phase organique biocompatible telle que le décane ou le dodécane) [2,3,4,5]. Le projet FOTOBIOMAT (subsidié par le programme Greenomat de la Région Wallonne – Belgique) a pour but de développer un nouveau type de photobioréacteur dans lequel sont mises en oeuvre les micro-algues encapsulées dans des billes constituées d’un matériau hybride. Le processus de photosynthèse est ainsi utilisé afin de convertir du CO2 en composés à haute valeur ajoutée (b-carotène p. ex.). La viabilité des micro-algues encapsulées doit être très importante (min. 6 mois). Idéalement, le b-carotène produit devrait être récupéré par une voie “propre” et ce, quasi en continu. [less ▲]

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailIndustrial hazards and social factors: a question of vulnerability
Rossignol, Nicolas ULg; Turcanu, Catrinel

Conference (2013, October 09)

In order to analyze and try to mitigate the potential consequences of a hazard threatening a complex socio-technical system, the risk analysis framework is classically used. Many risk analysis models ... [more ▼]

In order to analyze and try to mitigate the potential consequences of a hazard threatening a complex socio-technical system, the risk analysis framework is classically used. Many risk analysis models recognize now widely the importance of integrating social aspects into the analysis. Another way to deal with potential consequences of hazards is to analyze the vulnerability of the system considered. This paradigm overcomes the shortcomings of risk analysis in situations when the knowledge about the probabilities and the outcomes is incomplete or insufficient. Studies in the literature considering natural hazards show that socio-economic factors are integrated more often and in a natural way in vulnerability analysis models. Nevertheless, it seems that such considerations are missing into models aiming at evaluating the vulnerability to an industrial hazard, especially at a very local level where the technical aspects seem to be predominant. What can we learn from the analysis of the models addressing vulnerability to natural hazards in terms of the integration of social factors? To answer this question, we realized a systematic literature review from scientific journal papers on vulnerability analysis published in the last two decades. We synthesize this review and we propose an integrated vulnerability analysis model; in order to test this model we use as a case-study the incident reports collected in a nuclear facility in Belgium. This confrontation allows us to highlight important factors to be taken into account for a vulnerability analysis conducted in such a context. [less ▲]

Detailed reference viewed: 29 (2 ULg)
Full Text
See detailCitizens in the Wasteland: the Trouble with Radioactive Waste Management in Belgium
Parotte, Céline ULg

Conference (2013, October 09)

In Belgium, the long-term management of radioactive waste falls under the exclusive competence of the Belgian federal Agency for Radioactive Waste and Enriched Fissile Materials (ONDRAF). Contrary to the ... [more ▼]

In Belgium, the long-term management of radioactive waste falls under the exclusive competence of the Belgian federal Agency for Radioactive Waste and Enriched Fissile Materials (ONDRAF). Contrary to the existing situation for low-level waste, no institutional policy has yet been formally approved for the long-term management of long-lived and high level waste. In this context, ONDRAF considers the public and stakeholders’ participation and engagement as essential in the formulation of an effective and legitimate policy. This is why, over the past few years, it has decided to engage them in different ways (public dialogues, interdisciplinary conference, consensus conference, legal public consultation) to elaborate the “Waste Plan”, an ONDRAF-document containing guidelines to make a principled policy decision about nuclear waste management. To achieve “successful” public participation exercises, social scientists have been regularly mobilized either as external evaluators, follow-up committee members, or participative observers. Our previous research on such public participation processes showed that little had been said as to how stakeholders and the “public” have been mobilized by the Belgian Agency during the elaboration of the Waste Plan. How has the wider public opinion been integrated in the Waste Plan so far? To what extent could public participation and engagement redefine the internal debate within ONDRAF on the relevance and usefulness of such exercises for the long-term management of long-lived and high level waste? Based on official document analysis, semi-structured interviews and participatory observation, this paper explores how ONDRAF actually assesses the quality of public/stakeholders participation and how it makes use of it in its communication and management strategies. [less ▲]

Detailed reference viewed: 27 (3 ULg)
Full Text
Peer Reviewed
See detailComment reconnaître un autographe parmi les papyrus littéraires grecs ? L'exemple du P. Oxy. 74.4970
Marganne, Marie-Hélène ULg

Conference (2013, October 09)

Bien que peu nombreux, des autographes sont attestés dans les papyrus littéraires grecs (des IV/IIIe siècles avant notre ère aux VI/VIIe siècles de notre ère), qu'ils se présentent sous la forme de ... [more ▼]

Bien que peu nombreux, des autographes sont attestés dans les papyrus littéraires grecs (des IV/IIIe siècles avant notre ère aux VI/VIIe siècles de notre ère), qu'ils se présentent sous la forme de rouleaux ou de coupons de papyrus, de codices de papyrus ou de parchemin, voire de tablettes de bois. Comment les identifier ? Les recherches d'A. Petrucci et surtout de T. Dorandi ont montré qu'il fallait se fonder sur un faisceau d'indices tirés de l'examen du support et de la forme de la pièce écrite, de sa mise en page, de sa main, de l'état du texte, du genre littéraire auquel il appartient, ainsi que du contexte dans lequel il a été mis par écrit. Après avoir évoqué la vingtaine de papyrus littéraires grecs considérés comme des autographes ou copies d'auteurs, on étudiera, à titre d'exemple, un papyrus littéraire grec médical daté du IIe siècle de notre ère et récemment édité (P. Oxy. 74.4970), qui semble présenter plusieurs caractéristiques d'un autographe. [less ▲]

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailTrees communities and filters to restoration along a periurban gradient of tropical forest degradation
Hick, Aurélie ULg; Tooth, Martin; Tshibungu, Alain et al

Conference (2013, October 09)

Detailed reference viewed: 27 (6 ULg)
Full Text
Peer Reviewed
See detailHow to increase species diversity in phytostabilization strategies near Lubumbashi (D.R.C.)
Boisson, Sylvain ULg; Collignon, Julien ULg; Le Stradic, Soizig ULg et al

Conference (2013, October 08)

Copper contamination of soils represents a threat to natural areas and to human health. Phytostabilization, i.e using plants to immobilize contaminants, represents a well-known technology to hemper heavy ... [more ▼]

Copper contamination of soils represents a threat to natural areas and to human health. Phytostabilization, i.e using plants to immobilize contaminants, represents a well-known technology to hemper heavy metals spread across landscapes. In Katanga (Congo D.R.), Microchloa altera was recently identified as a candidate species to stabilize copper in soil. This grass naturally tolerates and accumulates high copper concentrations and belongs to the typical copper flora of Katanga. However more than 600 species compose this flora and other grasses may be used in phytostabilisation strategies. But little is known about the phenology reproductive strategy and demography of these species, which makes their use in current phytostabilization strategies difficult. The present study aims to characterize the reproduction capacity of seven other dominant grass species for future phytostabilisation tests. A total of 67 quadrats (1m²) were randomly placed across three sites. At two periods over the fruiting season, three inflorescences per species per quadrat were collected in order to estimate the number of spikes, spikelets and viable seeds. All species have sexual reproductive strategy and spikelets number presents little variation between populations. Three species are very common (Andropogon shirensis, Loudetia simplex and Eragrostis racemosa) and represent potential candidates to increase species diversity in phytostabilization strategies in Katanga. Further research, including germination tests and phytostabilization tests in situ, is planned in a near future. [less ▲]

Detailed reference viewed: 34 (7 ULg)
Full Text
See detailDe rol van de burgemeester tijdens het beheer van noodsituaties
Vincent, Jeffrey; Easton, Marleen; Dormaels, Arne et al

Conference (2013, October 08)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailLe « génie orienté produit » appliqué à l’élaboration de matrices poreuses pour l’ingénierie tissulaire.
de Bien, Charlotte ULg; Ounally, Thameur ULg; Collard, Valérie ULg et al

in Récents Progrès en Génie des Procédés (2013, October 08)

Ce travail vise à appliquer une approche « génie-orienté produit » à la fabrication de matrices poreuses synthétiques (scaffolds) susceptibles d’être utilisées en ingénierie tissulaire. Parmi les ... [more ▼]

Ce travail vise à appliquer une approche « génie-orienté produit » à la fabrication de matrices poreuses synthétiques (scaffolds) susceptibles d’être utilisées en ingénierie tissulaire. Parmi les différents polymères biosourcés et biodégradables déjà utilisés pour la fabrication de scaffolds, l’acide polylactique (PLA) a été choisi. Des matrices poreuses ont été obtenues par un procédé de moussage par lyophilisation puis leur microstructure 2D/3D a été caractérisée par microtomographie à rayons X avant d’être mise en lien avec les conditions d’élaboration testées. La diminution de la porosité ainsi que l’augmentation de l’épaisseur des parois avec l’augmentation de rapport polymère/solvant ont été confirmées. [less ▲]

Detailed reference viewed: 52 (25 ULg)
Full Text
Peer Reviewed
See detailDesign, Modeling and Performance Optimisation of a Reversible HP-ORC Prototype
Quoilin, Sylvain ULg; Dumont, Olivier ULg; Lemort, Vincent ULg

Conference (2013, October 08)

Building is one of the economical sectors where solutions are available to significantly reduce energy consumption and greenhouse gases emissions. Among other, heat pumps offer promising perspectives to ... [more ▼]

Building is one of the economical sectors where solutions are available to significantly reduce energy consumption and greenhouse gases emissions. Among other, heat pumps offer promising perspectives to provide energy-efficient space and sanitary hot water heating in many applications. This paper presents an innovative system comprising a heat pump connected to a solar roof and a geothermal heat exchanger. This heat pump is also able to invert its cycle and operate as an ORC. By using the whole rooftop (hereunder called “absorber”) as a heat source, a large amount of heat is generated throughout the year. This heat is used in priority to cover the building annual heating needs and the surplus heat generated during the summer is utilized to generate electricity in the so-called HP/ORC module. The same module can be used during winter as an efficient heat pump which radically reduces the complexity of the total system. The main advantage of the proposed technology is due to the reversibility of scroll machines, which have proven to operate efficiently both as compressor and as an expander in lab testing. [less ▲]

Detailed reference viewed: 54 (5 ULg)
Full Text
See detailTous créatifs! Art et Science 2.0: Les scientifiques et l'art
Andre, Marie ULg; Leleux, Violaine ULg; Bogaert, Jan ULg

Conference (2013, October 08)

Detailed reference viewed: 13 (3 ULg)
See detailAutoficción y paratopía en la obra de Javier Cercas
Taormina, Alizé ULg

Conference (2013, October 08)

En esta comunicación, proponemos reflexionar sobre la autoficción hispánica desde la perspectiva de un concepto que resulta del análisis del discurso, la paratopía creadora. Mostraremos así, a través del ... [more ▼]

En esta comunicación, proponemos reflexionar sobre la autoficción hispánica desde la perspectiva de un concepto que resulta del análisis del discurso, la paratopía creadora. Mostraremos así, a través del caso del escritor español Javier Cercas, en qué medida el género autoficcional puede funcionar como un mecanismo de legitimación para el escritor contemporáneo, cuya figura, en la sociedad actual, tiende a hacerse cada vez más pequeña y banal (Alberca 2007: 24). Según Dominique Maingueneau, una de las características del discurso literario es ser paratópico, es decir, se enuncia desde un lugar paradójico basado en una doble imposibilidad: la de cerrarse sobre sí mismo, y la de confundirse con la sociedad ordinaria. Por consiguiente, el enunciador de un discurso literario no se puede colocar ni dentro, ni fuera de la sociedad: “il est voué à nourrir son œuvre du caractère radicalement problématique de sa propre appartenance à cette société” (Maingueneau 2004: 52). Así la paratopía no sólo caracteriza la condición de la literatura, sino también la de todo creador, quien precisamente se convierte en creador si asume, de manera singular, la paratopía constitutiva del discurso literario. Para ejemplificar nuestra hipótesis, consideraremos las dos autoficciones de Javier Cercas: Soldados de Salamina (2001) y La velocidad de la luz (2005). Veremos que, en estos textos, Cercas se crea una condición de escritor paratópico que no tiene en la vida real: el dispositivo ambiguo de la autoficción, que mezcla los registros ficcional y factual, le permite manipular el referente real y reescribir ciertos episodios de su vida de manera que la hace paratópica. Así se presenta bajo los rasgos de un artista bohemio o un escritor maldito, dos figuras paratópicas por excelencia, pero también se aproxima a personajes –la pitonisa, el veterano de Vietnam– y lugares –la residencia de ancianos, el campus universitario– atrapados en una pertenencia imposible: pertenecen y no pertenecen a la sociedad ordinaria. De esta manera, demostraremos cómo Cercas se atribuye, mediante su alter ego ficcional, cierta legitimidad, al inscribirse en situaciones paratópicas que su vida de hombre “normal” no le da. [less ▲]

Detailed reference viewed: 49 (15 ULg)
Peer Reviewed
See detailUse of on-line flow cytometry to detect segregation in the microbial population
Brognaux, Alison ULg; Zune, Quentin ULg; Han, Shanshan et al

Poster (2013, October 08)

Detailed reference viewed: 28 (8 ULg)
Peer Reviewed
See detailSuitability of the soil map and legacy data in Wallonia (Belgium) to support the GlobalSoilMap initiative
Legrain, Xavier ULg; Bock, Laurent ULg; Colinet, Gilles ULg

in Arrouays, Dominique; McKenzie, Neil; Hempel, Jon (Eds.) et al GlobalSoilMap - Basis of the global spatial soil information system (2013, October 07)

Belgium is covered with large-scale soil map and high density of historical profiles, now available in a numerical format. This papier first gives an overview of the soil properties which can be predicted ... [more ▼]

Belgium is covered with large-scale soil map and high density of historical profiles, now available in a numerical format. This papier first gives an overview of the soil properties which can be predicted from these documents, in combination with the legacy data, and of the uncertainty we can expect for now. The great potential of the soil map is highlighted, as well as its complexity. Example of the soil depth to rock points out the need of a thorough understanding of the soil map in order (i) to interpret correctly the information hidden behind each symbols or emerging from their combination and (ii) to take into account the sub-regional features. Expert knowledge seems essential, associated with historical and new hard data, in order to build a rich and confident map which respects the recommendations of the GlobalSoilMap.net project. [less ▲]

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailSizing models and performance analysis of waste heat recovery organic Rankine cycles for heavy duty trucks
Guillaume, Ludovic ULg; Legros, Arnaud ULg; Quoilin, Sylvain ULg et al

in Proceedings of the ASME ORC 2013 second international seminar on ORC power systems (2013, October 07)

This paper attempts to address this problematic of selecting the architecture, the expander and the working fluid for a waste heat recovery organic (or non-organic) Rankine cycle on a truck engine. It ... [more ▼]

This paper attempts to address this problematic of selecting the architecture, the expander and the working fluid for a waste heat recovery organic (or non-organic) Rankine cycle on a truck engine. It focuses especially on three expander technologies: the scroll, the piston and the screw expanders, and three working fluids: R245fa, ethanol and water. [less ▲]

Detailed reference viewed: 101 (3 ULg)
Full Text
Peer Reviewed
See detailRobust and Computationally Efficient Dynamic Simulation of ORC Systems: The ThermoCycle Modelica Library
Quoilin, Sylvain ULg; Desideri, Adriano ULg; Bell, Ian ULg et al

Conference (2013, October 07)

The ThermoCycle library, an open-source library for dynamic modeling of ORC systems, has been recently developed in the Modelica language and is presented in this paper. Special attention has been paid to ... [more ▼]

The ThermoCycle library, an open-source library for dynamic modeling of ORC systems, has been recently developed in the Modelica language and is presented in this paper. Special attention has been paid to robustness and to simulation speed. Dynamic simulations are indeed often limited by numerical constraints and failures, either during initialization or during integration. Furthermore, the use of complex equations of state (EOS) to compute thermodynamic properties dramatically decreases the simulation speed. In this paper, the different numerical methods developed to overcome these limitations are presented and discussed and the proposed models are then benchmarked against alternative simulation tools. [less ▲]

Detailed reference viewed: 111 (6 ULg)
Full Text
See detailInterpolation of SLA Using the Data-Interpolating Variational Analysis in the Coastal Area of the NW Mediterranean Sea
Troupin, Charles ULg; Barth, Alexander ULg; Beckers, Jean-Marie ULg et al

Poster (2013, October 07)

The spatial interpolation of along-track Sea-Level Anomalies (SLA) data to produce gridded map has numerous applications in oceanography (model validation, data assimilation, eddy tracking, ...). Optimal ... [more ▼]

The spatial interpolation of along-track Sea-Level Anomalies (SLA) data to produce gridded map has numerous applications in oceanography (model validation, data assimilation, eddy tracking, ...). Optimal Interpolation (OI) is often the preferred method for this task, as it leads to the lowest expected error and provides an error field associated to the analyzed field. However, the method suffers from limitations such as the numerical cost (due to the inversion of covariance matrices) as well as the isotropic covariance function, generally employed in altimetry. The Data-Interpolating Variational Analysis (DIVA) is a gridding method based on the minimization of a cost function using a finite-element technique. The cost function penalizes the departures from observations, the smoothness of the gridded field and physical constraints (advection, diffusion, ...). It has been shown that DIVA and OI are equivalent (provided some assumptions on the covariances are made), the main difference is that in DIVA, the covariance function is not explicitly formulated. The technique has been previously applied for the creation of regional hydrographic climatologies, which required the processing of a large number of data points. In this work we present the application and adaptation of Diva to the analysis of SLA in the Mediterranean Sea and the production of weekly maps of SLA in this region. The peculiarities of SLA along-track data are addressed: • number of observations: the finite-element technique coupled to improvements in the matrix inversion (parallel or iterative solvers) lead to a decrease of the computational time, meaning that sub-sampling of the initial data set is not required. • quality of the different missions: the weight attributed to each data point can be easily set according to the satellite that provided the observations, so that different measurement noise variances are considered. • spatial correlation scale: it varies spatially in the domain according to the value of the Rossby radius of deformation. • long-wavelength errors: each data point is associated a class, and a detrending technique allows the determination of the trend for each class, leading to a reduction of the inconsistencies between missions. • anisotropy of physical coastal features: a pseudo-velocity field derived from regional bathymetry enhances the correlations along the main currents. Particular attention will be paid to the influence of this constraint in the coastal area. The analysis and error fields obtained over the Mediterranean Sea are compared with the available gridded products from AVISO. Different ways to compute the error field are compared. The impact of the use of multiple missions to prepare the gridded fields is also examined. In situ measurements from an intensive multi-sensor experiment carried out north of the Balearic Islands in May 2009 serve to assess the quality of the gridded fields in the coastal area. [less ▲]

Detailed reference viewed: 21 (1 ULg)
Full Text
Peer Reviewed
See detailBlood pressure dipping and arterial stiffness in kidney transplant recipients
XHIGNESSE, Patricia ULg; Saint-Remy, Annie ULg; BONVOISIN, Catherine ULg et al

Conference (2013, October 05)

In 70 kidney transplant recipients, nocturnal blood pressure(BP) nondipping (nondipping or reversed rhythm) was highly frequent (48% were nondippers and 29% had a reversed rhythm). When compared dippers ... [more ▼]

In 70 kidney transplant recipients, nocturnal blood pressure(BP) nondipping (nondipping or reversed rhythm) was highly frequent (48% were nondippers and 29% had a reversed rhythm). When compared dippers, nondippers and reversed, neither BMI, time on hemodialysis, graft survival, eGFR or antihypertensive drugs allowed to distinct the three groups. Pulse Wave Velocity (PWV) did not differ between groups but calcification score and ambulatory arterial stiffness index (AASI) were significantly the highest in récipients with reversed rhythm. That was also the case in nondippers recipients. [less ▲]

Detailed reference viewed: 24 (1 ULg)
See detailFrom One Loop To Another: From Minimalism To Indie Rock
Levaux, Christophe ULg

Conference (2013, October 05)

Detailed reference viewed: 23 (2 ULg)
Full Text
See detailPastoral dynamics in the Region of Diffa (Niger) : a descriptive analysis of livestock capital
Rouchet, François ULg; Abdoulkadri, Laouali; Lebailly, Philippe ULg et al

Conference (2013, October 05)

Detailed reference viewed: 17 (7 ULg)
See detailL’interdisciplinarité comme posture impliquée et indisciplinée, créative et coopérative.
Denayer, Dorothée ULg; Levain, Alix; Coutellec, Leo et al

Conference (2013, October 05)

Detailed reference viewed: 12 (1 ULg)
Peer Reviewed
See detailTourisme rural : le parent pauvre du financement des activités en milieu rural camerounais
Lekane Tsobgou, Dieudonné ULg; MEDIEBOU CHINDJI, Rose

Conference (2013, October 04)

Le tourisme en général et le tourisme rural est une activité économique en plein essor dans le monde. Au Cameroun par exemple, les espaces ruraux regorgent de nombreuses destinations touristiques, ainsi ... [more ▼]

Le tourisme en général et le tourisme rural est une activité économique en plein essor dans le monde. Au Cameroun par exemple, les espaces ruraux regorgent de nombreuses destinations touristiques, ainsi que de fortes potentialités naturelles et culturelles à promouvoir. 2/3 des citadins retournent fréquemment dans leur terroir pour diverses raisons et dépensent d’énormes sommes d’argent d’où l’intérêt pour les promoteurs d’activités touristiques de capter cette masse et ce flux monétaire. L’abandon des plans quinquennaux, la disparition de la Société Camerounaise du Tourisme (Socatour), du Fond National pour le Développement Rural (Fonader) et du Fonds de Garantie et d’Assistance aux Petites et Moyennes Entreprises (Fogape) depuis la décennie 1990 ont créé dans le secteur du tourisme rural, une grave crise de financement et d’encadrement des acteurs et de leurs activités. La forte mobilisation des ressources financières venant des institutions étatiques, de la coopération internationale, des comités de développement locaux (Kengne Fodouop et Dejon 2003), les élites (Elong 2012) et des acteurs micro financiers privés oriente 90% des lignes de crédit ou du financement rural en direction des projets agricoles et commerciaux (Lekané 2011., Tchékoté 2012) et non vers les activités du tourisme. Pourtant, Le tourisme rural au Cameroun serait une opportunité intéressante dans le processus du développement local (Onomo 2009, Kimbu 2012). A ce titre, il constitue un gisement intarissable d’emplois dans l’hébergement, la restauration, le transport, le marketing et la commercialisation des destinations, etc… La segmentation de cette activité en milieu rural devrait favoriser la création de richesse (DSCE, 2010). Qu’est ce qui explique le fait qu’après une quarantaine d’années de financement du monde rural, le secteur du tourisme continue de chercher en vain « l’argent chaud » susceptible de promouvoir durablement ses activités ? Comment comprendre l’abandon d’un secteur pourtant intégrateur de l’économie rurale au Cameroun? Est-il possible d’assurer la durabilité du financement des espaces ruraux afin de mieux commercialiser et rentabiliser les ressources naturelles et culturelles qui s’y trouvent [less ▲]

Detailed reference viewed: 30 (5 ULg)
Full Text
Peer Reviewed
See detailConvective Drying of Mixtures of Sewage Sludge and Sawdust in a Fixed Bed
Li, Jie ULg; Fraikin, Laurent ULg; Salmon, Thierry ULg et al

Conference (2013, October 04)

This work is part of a project aiming at developing a renewable fuel for gasification purposes, through the convective drying of sludge/wood mixtures. The first step consists in characterizing the drying ... [more ▼]

This work is part of a project aiming at developing a renewable fuel for gasification purposes, through the convective drying of sludge/wood mixtures. The first step consists in characterizing the drying behaviour of sludge/sawdust mixtures, in a convective fixed bed dryer. In particular, the influence of the mixing step (no mixing against 30 s at 40 rpm) and the sawdust/sludge ratio (1/9, 2/8, 3/7 and 4/6 on a dry basis) have been investigated, as well as the drying temperature (50 °C, 80 °C and 110 °C). As showed in a previous work, the addition of dry matter into sludge has an impact on the initial 3D structure of the bed of extrudates to be dried. Moreover, it is well known that the volume shrinkage occurring during sludge drying will affect the drying velocity. In this study, X-ray tomography, a non-invasive imaging technique, is used to assess changes in volume, porosity and exchange surface between the beginning and the end of the drying process. Results first confirm the importance of the mixing step on the drying behaviour: the drying rate of the mixed sludge is slower than the one of original sludge. Nevertheless the addition of sawdust is shown to have a positive impact on the drying process from mass ratio of 2/8, with observed drying rates higher than for the original sludge. During the whole drying process, the volume and exchange surface of the sample increase and the porosity decreases as the mass ratio increases. These results indicate that the air and the sample contact more fully with more sawdust addition, resulting from bed expansion and exchange surface increase. Hence, the heat and mass transfer efficiency between the air and the material increases and consequently the drying rate. Further work will be done in order to assess the impact of the drying temperature and to characterize the behaviour of these samples during pyrolysis using thermo gravimetric analysis. [less ▲]

Detailed reference viewed: 8 (2 ULg)
Peer Reviewed
See detailSoil classification, map legends and GIS logic: experiences from converting the legend of the soil map of Belgium into WRB
Dondeyne, Stefaan; Legrain, Xavier ULg; Deckers, Jozef et al

Conference (2013, October 04)

A systematic soil survey of Belgium was conducted from 1948 to 1991. The purpose was to have a soil information base adequate for boosting agricultural production after the Second World War. Field surveys ... [more ▼]

A systematic soil survey of Belgium was conducted from 1948 to 1991. The purpose was to have a soil information base adequate for boosting agricultural production after the Second World War. Field surveys were done at the detailed scale of 1:5000, while the maps were published at a 1:20,000 scale. To enable soil surveyors to identify soils in the field, an original soil classification was developed based on readily observable physical and morphogenetic characteristics. Within the European Union, the World Reference Base (WRB) for Soil Resources (IUSS Working Group WRB, 2007), has been adopted as the common classification system. As soil surveys in most European countries were conducted independently, the challenge now is to convert the national legends into a common WRB legend. In Belgium, such a conversion is being implemented and we present some lessons learned in relation to classification and map legends. The legend of the soil map of Belgium is based primarily on soil texture, drainage status and profile development. “Soil series” are defined in an open and non-hierarchical structure by combining these three categorical variables, and to which modifiers can be added such as parent material, stoniness or depth to a substratum. The WRB-2007 classification is based on diagnostic features defined by morphological, physical and chemical properties. The conversion of the legend of the soil map of Belgium to WRB is based on insights gained from classifying, so far, more than 360 legacy soil profiles in combination with field observations. From these insights, heuristic rules have been deduced regrouping soil series into Reference Soil Groups (RSG) and for which some qualifiers could also be identified. Other qualifiers were determined by relying on databases of the legacy soil profiles. To take regional variability into account, the conversion is done by physiographic zone. Converting the legend of the soil map of Belgium to WRB actually leads to a regrouping of soil series into broader WRB categories and which can neatly be represented on 1:50,000 scale maps. Hence, it does not imply substituting one classification with another one. Users, who would need the detailed information, can still refer to the detailed symbols of the soil series. The regrouping of soil series has been made possible thanks to the flexibility of WRB for combining various qualifiers. However, as the WRB-2007 classification leads to a varying number of qualifiers it is less practical for constructing map legends. Therefore, the WRB-2010 guidelines (IUSS Working Group WRB, 2010) propose to organise qualifiers in main and optional ones with priority rules for the main qualifiers. As illustrated in Table 1, this approach may highlight, or hide, some qualifiers inconsistently. When for example only two qualifiers are retained in a map legend, the qualifier Endogleyic of stony, poorly drained Albic Podzols will not be indicated, while it will be indicated when such soils are not stony (Table 1). Moreover, the proposed hierarchy is sometimes also inconsistent when compared across Reference Soil Groups (RSG) as illustrated for the Arenosols and Regosols (Table 1). These drawbacks could be avoided if qualifiers would be organised into thematic groups ― such as profile development, texture, drainage, depth of substratum and fertility ― rather than by ranking them. Grouping qualifiers thematically would have the advantage to give more flexibility to the map user working with GIS, and indeed, it would render WRB a more “GIS logic” classification system. [less ▲]

Detailed reference viewed: 7 (0 ULg)