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See detailStudy of the microbial diversity in vacuum-packed chilled beef from different origins through a metagenomics approach
Didimo Imazaki, Pedro Henrique ULg; Taminiau, Bernard ULg; Nezer, Carine et al

Poster (2012, April)

Despite a diverse initial microbial population, bacterial spoilage of vacuum-packed chilled beef is mainly due to the growth of psychrotrophic bacteria. The study of the microflora of vacuum-packed ... [more ▼]

Despite a diverse initial microbial population, bacterial spoilage of vacuum-packed chilled beef is mainly due to the growth of psychrotrophic bacteria. The study of the microflora of vacuum-packed chilled beef remains a challenge since some members of the microflora may be missed or not identified by cultivation-based methods. The aim of this study was to evaluate the microbial diversity in eight batches of vacuum-packed chilled beef from different origins (Australia, Belgium, Brazil, Ireland and United Kingdom) by metagenomics. Longissimus dorsi muscle samples were homogenized and analysed in early and late stages of their shelf life by metagenomics. The metagenomic assays consisted in DNA extraction, 16S ribosomal RNA gene amplification, pyrosequencing and data analysis. All samples, except for two batches from Australia, presented a high microbial diversity in the beginning of their shelf life. Enterobacteriaceae, Pseudomonas, Burkholderia, Lactobacillus and Sterotrophomonas were some of the major bacteria identified at this stage of storage. The dominant flora (> 80 % of relative abundance) in two Australian batches was composed by Carnobacterium. At the end of the shelf life of the samples, a decrease in microbial diversity was observed in almost all batches. At this stage of storage, Carnobacterium, Lactobacillus, Lactococcus and Enterococcus were some of the major genera identified. Carnobacterium remained the dominant flora in the two Australian batches cited above, which could explain the long shelf life applicable to this meat (140 days) as some Carnobacterium strains induce a biopreservative effect especially by producing bacteriocins with a wide inhibition spectrum. Metagenomics showed to be a very useful tool to study the microbial population of a complex matrix such as meat since some of the identified genera such as Lactobacillus and Carnobacterium are known not to grow or to grow slowly in media commonly used for the isolation and cultivation of total viable counts. [less ▲]

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See detailLong-term magnetic field monitoring of the Sun-like star \xi Bootis A
Morgenthaler, A.; Petit, P.; Saar, S. et al

in Astronomy and Astrophysics (2012), 540

Aims: We aim to investigate the long-term temporal evolution of the magnetic field of the solar-type star ξ Bootis A, both from direct magnetic field measurements and from the simultaneous estimate of ... [more ▼]

Aims: We aim to investigate the long-term temporal evolution of the magnetic field of the solar-type star ξ Bootis A, both from direct magnetic field measurements and from the simultaneous estimate of indirect activity indicators. Methods: We obtained seven epochs of high-resolution, circularly-polarized spectra from the NARVAL spectropolarimeter between 2007 and 2011, for a total of 76 spectra. Using approximately 6100 photospheric spectral lines covering the visible domain, we employed a cross-correlation procedure to compute a mean polarized line profile from each spectrum. The large-scale photospheric magnetic field of the star was then modelled by means of Zeeman-Doppler Imaging, allowing us to follow the year-to-year evolution of the reconstructed magnetic topology. Simultaneously, we monitored the width of several magnetically sensitive spectral lines, the radial velocity, the line asymmetry of intensity line profiles, and the chromospheric emission in the cores of the Ca II H and Hα lines. Results: During the highest observed activity states, in 2007 and 2011, the large-scale field of ξ Bootis A is almost completely axisymmetric and is dominated by its toroidal component. The toroidal component persists with a constant polarity, containing a significant fraction of the magnetic energy of the large-scale surface field through all observing epochs. The magnetic topologies reconstructed for these activity maxima are very similar, suggesting a form of short cyclicity in the large-scale field distribution. The mean unsigned large-scale magnetic flux derived from the magnetic maps varies by a factor of about 2 between the lowest and highest observed magnetic states. The chromospheric flux is less affected and varies by a factor of 1.2. Correlated temporal evolution, due to both rotational modulation and seasonal variability, is observed between the Ca II emission, the Hα emission and the width of magnetically sensitive lines. The rotational dependence of polarimetric magnetic measurements displays a weak correlation with other activity proxies, presumably due to the different spatial scales and centre-to-limb darkening associated with polarimetric signatures, as compared to non-polarized activity indicators. Better agreement is observed on the longer term. When measurable, the differential rotation reveals a strong latitudinal shear in excess of 0.2 rad d-1. [less ▲]

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See detailClinical characterization of cabergoline resistant prolactinomas : a multicenter experience on 92 patients
VROONEN, Laurent ULg; Jaffrain Rea, ML; PETROSSIANS, Patrick ULg et al

in Annales d'Endocrinologie (2012, April), 73(2), 153

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See detailTwo distinct origins of long-term learning effects in verbal short-term memory?
Majerus, Steve ULg; Oberauer, K.

Conference (2012, April)

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See detailChronique - Cour de Justice et Tribunal de l'Union européenne - Concurrence
Petit, Nicolas ULg; Lousberg, Charlotte ULg

in Journal du Droit International - Clunet (2012), (2), 747-759

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See detailA new species of Caprella (Crustacea: Amphipoda) from the Mediterranean Sea
Sturaro, Nicolas ULg; Guerra-García, José Manuel

in Helgoland Marine Research (2012)

A new caprellid amphipod, Caprella tavolarensis n. sp., is described based on specimens collected from a Posidonia oceanica seagrass meadow at the Tavolara- Punta Coda Cavallo Marine Protected Area ... [more ▼]

A new caprellid amphipod, Caprella tavolarensis n. sp., is described based on specimens collected from a Posidonia oceanica seagrass meadow at the Tavolara- Punta Coda Cavallo Marine Protected Area (Sardinia, Mediterranean Sea). The species is close to Caprella liparotensis, but can be clearly distinguished by smaller size, presence of a short rostrum, body elongate and dorsally smooth, absence of serrate carina on the basis of gnathopod 2 and pereopods, mouthparts scarcely setose, absence of Wne setae on peduncle of antenna 1 and absence of swimming setae on antenna 2. The number of caprellid species reported from the Mediterranean Sea has increased from 23 (1993) to 41 (2010), consequently, further taxonomical studies should be addressed to properly estimate the total amphipod diversity in the Mediterranean Sea. [less ▲]

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See detailNon invasive sleep monitoring
Deliège, Benjamin; Coppieters, Dorothée ULg

Conference (2012, April)

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See detailEnseigner à des étudiants non acquis à la matière…
Focant, Jean-François ULg

Learning material (2012)

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See detailSuccessions internationales: perspectives d'avenir
Rosoux, Hélène ULg

in Leleu, Yves-Henri (Ed.) Chroniques notariales, vol. 55 (2012)

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See detailImposing periodic boundary condition on arbitrary meshes by polynomial interpolation
Nguyen, Van Dung ULg; Béchet, Eric ULg; Geuzaine, Christophe ULg et al

in Computational Materials Science (2012), 55

In order to predict the effective properties of heterogeneous materials using the finite element approach, a boundary value problem (BVP) may be defined on a representative volume element (RVE) with ... [more ▼]

In order to predict the effective properties of heterogeneous materials using the finite element approach, a boundary value problem (BVP) may be defined on a representative volume element (RVE) with appropriate boundary conditions, among which periodic boundary condition is the most efficient in terms of convergence rate. The classical method to impose the periodic boundary condition requires the identical meshes on opposite RVE boundaries. This condition is not always easy to satisfy for arbitrary meshes. This work develops a new method based on polynomial interpolation that avoids the need of matching mesh condition on opposite RVE boundaries. [less ▲]

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See detailLe régime alimentaire du Martin-pêcheur huppé Alcedo cristata pendant la période de reproduction dans la région de Kinshasa (R.D. Congo)
Kisasa Kafutshi, Robert ULg

in Malimbus (2012), 34

The diet of the Malachite Kingfisher was investigated by study of 182 regurgitated pellets collected from 65 broods during the nesting period in the rainy seasons from 2004 to 2009, in two sites in the ... [more ▼]

The diet of the Malachite Kingfisher was investigated by study of 182 regurgitated pellets collected from 65 broods during the nesting period in the rainy seasons from 2004 to 2009, in two sites in the Kinshasa area. In total, 2619 undigested remains were identified in the pellets, revealing 1100 prey. The Malachite Kingfisher’s diet is rich and diverse. The prey identified were 92.7 % fishes (Oreochromis niloticus, Gambusia affinis and Hemichromis elongatus), 5.9 % insects (Odonata and Orthoptera) and 0.5 % frogs. [less ▲]

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See detailQuerelles d’écrivains (XIXe-XXIe siècles) : de la dispute à la polémique, dans COnTEXTES, revue de sociologie de la littérature
Stienon, Valérie ULg; Groupe de contact FNRS Contextes en sociologie de la littérature

Book published by Université de Liège (2012)

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See detailEnjeux, obstacles et atouts d'un modèle de soins aux contours indéterminés
Thunus, Sophie ULg

in Revue de l'Observatoire (2012), 72

Cette contribution porte sur les enjeux que soulève la réforme des soins de santé mentale en Belgique, au carrefour de l’évolution socio-historique du secteur, et d’un modèle des soins inscrit au sein de ... [more ▼]

Cette contribution porte sur les enjeux que soulève la réforme des soins de santé mentale en Belgique, au carrefour de l’évolution socio-historique du secteur, et d’un modèle des soins inscrit au sein de tendances internationales. Précisément, l’objectif est de mettre en tension l’indétermination du modèle, au sens où il renvoie à un ensemble d’expériences étrangères plus qu’un un corpus de savoirs; et la configuration d’une offre de soins encore déterminée par ses frontières institutionnelles. [less ▲]

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See detailL'ancien institut de stomatologie à Bavière en sursis
Charlier, Sébastien ULg

in Nouvelles du Patrimoine (Les) (2012), 135

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See detailETAPE - Rapport d’évaluation des résultats
Vanmeerbeek, Marc ULg; Bednarek, Stéphanie; Lachaussée, Sophie et al

Report (2012)

Contexte et objectifs ETAPE est un programme d’intervention précoce à domicile au bénéfice de familles à risque de négligence parentale. Le programme prend en charge des enfants de 0 à 30 mois, ainsi que ... [more ▼]

Contexte et objectifs ETAPE est un programme d’intervention précoce à domicile au bénéfice de familles à risque de négligence parentale. Le programme prend en charge des enfants de 0 à 30 mois, ainsi que leurs parents, au rythme d’une à deux visites à domicile par semaine. L’intervention consiste en des massages du bébé, des jeux psychomoteurs. Un temps important est en outre consacré à l’accompagnement et à la guidance du rôle parental. L’originalité du projet est qu’il est centré sur le développement psychomoteur et affectif du bébé en lien avec son ou ses parents. L’étude cherche à mesurer l’efficacité du programme en termes de développement psychomoteur de l’enfant, de qualité d’attachement au sein de la dyade parent-enfant et de compétences éducatives des parents. Méthodologie Les aptitudes psychomotrices de l’enfant ont été mesurées au moyen du test de Brunet et Lézine modifié, au début, en milieu et en fin d’intervention. Le caractère sécure ou non de l’attachement a été mesuré chez le caregiver par Q-Sort en début et en fin d’intervention. Les compétences parentales ont été évaluées tous les six mois durant l’intervention au moyen d’un questionnaire développé par l’équipe de recherche en 2008 (MASPIN) et complété par les intervenants sur base de leurs observations. Résultats Douze enfants ont été étudiés. Les trois quarts ont été pris en charge avant 1 an ; la durée moyenne d’intervention est de 11,3 mois. En moyenne, les enfants gagnent nettement en score de développement moteur global, gagnent un peu en socialisation, sont stables en développement moteur fin. La plupart régressent au score de langage, ce qui influence négativement le score global de développement. Deux enfants sur douze sont sécures au début et à la fin de l’intervention (mais ce ne sont pas les mêmes). Aucun ne termine l’intervention significativement insécurisé, mais la relation dans la dyade n’est en général pas optimale. Les résultats de MASPIN permettent d’étoffer les autres résultats obtenus et de mieux comprendre l’évolution au cas par cas. Discussion Les résultats, mesurés par les tests de Brunet-Lézine et le Q-Sort semblent modestes dans certains domaines, mais doivent être analysés à la lumière des conditions d’intervention. MASPIN a donné une vue beaucoup plus précise de la réalité et de son évolution. Ce questionnaire a aussi permis de monitorer l’intervention. Toutefois, la finesse des observations et l’aspect subjectif de la cotation empêchent une analyse globale des résultats ; la fidélité intercotateur doit encore être validée. MASPIN permet en outre de donner des repères pour le dialogue avec d’autres professionnels impliqués dans le suivi des situations, et fournit un canevas qui facilite la discussion avec les familles sur l’exercice de la parentalité et les objectifs d’intervention. L’analyse des résultats permet de prendre conscience que certaines compétences (par ex., le langage) méritent d’être mieux soutenues et stimulées par les intervenants de terrain.) Des collaborations extérieures devront être développées (par ex : psychologue, aide sociale). L’investissement requis de la part des intervenants est important. Le risque de découragement est grand ; ils doivent être soutenus et supervisés de façon efficace dans ce travail. L’instauration d’un vrai esprit d’équipe est indispensable Conclusion Le rendement de ce programme, destiné à un public particulièrement difficile, est intéressant mais variable selon les situations prises en charge, que ce soit en termes de développement psychomoteur ou d’attachement à la figure parentale. L’outil MASPIN se révèle précieux dans de multiples aspects de la prise en charge, depuis le dialogue avec les professionnels qui identifient la situation, jusqu’au monitorage des objectifs au fil de l’intervention, en passant par la construction des objectifs d’intervention avec les parents. [less ▲]

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See detailTimbre description of the sound of air-treatment systems for predicting acoustic confort
Minard, Antoine; Billon, Alexis ULg; Goujard, B. et al

Poster (2012, April)

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See detailVideos in motion: Processes of Transnationalization in the Southern Nigerian Video Industry: Networks, Discourses, Aesthetics
Jedlowski, Alessandro ULg

Doctoral thesis (2012)

On the ground of a three years-long multi-sited, ethnographic research conducted in Southern Nigeria, Italy and the United Kingdom, my PhD dissertation analyzes the processes of transnationalization that ... [more ▼]

On the ground of a three years-long multi-sited, ethnographic research conducted in Southern Nigeria, Italy and the United Kingdom, my PhD dissertation analyzes the processes of transnationalization that have affected the southern Nigerian video film industry (Nollywood) during the first decade of the 2000s, and interpret their significance in relation to the industry’s history and recent developments. Transnationalization processes have affected the industry at different levels, which include its economic and social organization, its international representation, and the narrative and aesthetic features of the films it produces. The dissertation analyzes these different levels through three separated, but interrelated, sections: 1) The Nigerian video industry has experienced a transnational success since its early stages. Thanks to the informality of Nollywood’s network of distribution, pirated copies of Nigerian videos have circulated throughout the world since the mid 90s. Informal and pirated networks of circulation made videos travel long distances and create for the industry a wide transnational audience. However, as this section argues, informal production and distribution strategies and their vulnerability to piracy progressively eroded the industry’s economy. This section then argues that, once the internal Nigerian video market has started to implode because of the excess of informality and the lack of a proper distribution framework, an important section of the industry has explicitly decided to target the transnational audience generated by the global informal circulation of Nigerian video films. New modes of production and circulation emerged, which mainly target local elites and diasporic audiences. A new wave of high budget productions saw the light. The videos’ patterns of mobility transformed and, this impacted on video films’ economic accessibility for local popular audiences. 2) The second section analyzes the way videos’ discursive circulation (that is, the way in which videos, and the video phenomenon in general, have been portrayed, discussed and analyzed both in Nigeria and elsewhere) impacted on the video industry’s transformation. As with the material and economic circulation analyzed in the first section, videos’ discursive circulation interacted with the video phenomenon in at least two ways. On the one hand it made videos travel. It made them cross boundaries and reach audiences they did not even envisaged to reach. On the other hand, it opened for the video industry a field of dynamic confrontation. Nollywood has been compared to other global film industries (such as Bollywood and Hollywood), and it has been criticized for its low production quality standards. The video phenomenon has been celebrated for some of its achievement, and mocked for some of its weaknesses. This complex interaction with the global cinema arena has produced numerous effects on the video industry. Videos entrepreneurs reacted to criticism and engaged into active processes of transformation aimed at making the video industry reach international production quality standards, and escape the marginal position within which much of the mentioned discursive constructions positioned it. 3) The third section looks at videos’ aesthetics and narrative structures. The transnational mobility of the videos impacted on them in multiple ways. On the one hand, as a result of the encounter of both transnational and local aesthetic and narrative aspects, videos developed a particular aesthetic and narrative openness which made them able to address dispersed audiences and reconstitute them into a pan-African public. Through their specific film language, contents, and forms of address videos activated a debate on what it means to be African today, and shaped it around the social, cultural and historic specificities of the post-colonial, post-Structural-Adjustment era in Nigeria and, more generally, in sub-Saharan Africa. On the other hand, mobility intervened in the reformulation of videos’ narrative and aesthetic patterns. The video phenomenon has been adopted and reinterpreted by Nigerian diaporic groups in Europe and elsewhere. The specific social and economic conditions associated with the experience of living in the diaspora interacted with the videos’ production strategies and defined particular narrative and aesthetic solutions. When the Nigerian video industry entered the production crisis diasporic production companies found themselves in the position of an avant-garde in what concerns the industry’s transnational expansion: they had already experimented with economic and aesthetic solutions that could open Nigerian productions to global audiences. As a result, they became the bridge able to connect the Nigerian video film industry to transnational, non-African audiences. [less ▲]

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See detailIntroduction générale
Bouhon, Frédéric ULg; Reuchamps, Min ULg

in Bouhon, Frédéric; Reuchamps, Min (Eds.) Les systèmes électoraux de la Belgique (2012)

Cette introduction ouvre un ouvrage collectif consacré aux systèmes électoraux de la Belgique. Elle insiste sur le caractère multidisciplinaire de l'étude des questions électorales qui est proposée dans ... [more ▼]

Cette introduction ouvre un ouvrage collectif consacré aux systèmes électoraux de la Belgique. Elle insiste sur le caractère multidisciplinaire de l'étude des questions électorales qui est proposée dans le livre et en présente le plan. [less ▲]

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