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See detailTo be plastic is fantastic: delineate coral species niches for assessing their tolerance to changes
Denis, Vianney; Sturaro, Nicolas ULg; Yang, Shan-Hua et al

Conference (2017, April 24)

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may ... [more ▼]

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may exhibit. The plasticity in traits will define ecological strategies associated with contrasted degrees of tolerance to changes. In this process, specialists are expected to tolerate few changes to the environmental conditions and are restricted to specific habitat. To contrast, generalists can cope with a wider range of environmental conditions by readjusting traits according to the habitat’s features. Ecological strategies in corals have been exclusively defined according to species’ trait averages, irrespective of individual variations. Challenges representing the acquisition and use of energy have also tended to be oversimplified, specifically by the choice of easy traits in the absence of strong scientific evidence. Here, we propose a framework to re-examine strategies in scleractinian corals by focusing on the intraspecific variation of traits. We will show how the characteristics of a given species niche can help coral species to tolerate changes, illustrating this approach with examples taken from high-latitude locations and mesophotic coral ecosystems. We will demonstrate that multidisciplinary approach focusing on three major characteristics of the coral holobiont (its physiology, trophic ecology, and associated micriobiome), we can enhance the comprehension of ecological plasticity of coral species and predict future ecosystem reconfiguration. [less ▲]

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See detailComment on “Hypogonadotrophic hypogonadism due to a mutation in the luteinizing hormone β-subunit gene”
VALDES SOCIN, Hernan Gonzalo ULg; Daly, Adrian ULg; BECKERS, Albert ULg

in Korean Journal of Internal Medicine (The) (2017), 32(3), 566-567

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See detailClay minerals behaviour in thin sandy clay-rich lacustrine turbidites (Lake Hazar, Turkey)
El Ouahabi, Meriam ULg; Hubert, Aurelia ULg; Lamair, Laura ULg et al

Poster (2017, April 23)

Turbidites have been extensively studied in many different areas using cores or outcrop, which represent only an integrated snapshot of a dynamic evolving flow. Laboratory experiments provide the missing ... [more ▼]

Turbidites have been extensively studied in many different areas using cores or outcrop, which represent only an integrated snapshot of a dynamic evolving flow. Laboratory experiments provide the missing relationships between the flow characteristics and their deposits. In particular, flume experiments emphasize that the presence of clay plays a key role in turbidity current dynamics. Clay fraction, in small amount, provides cohesive strength to sediment mixtures and can damp turbulence. However, the degree of flocculation is dependent on factors such as the amount and size of clay particles, the surface of clay particles, chemistry and pH conditions in which the clay particles are dispersed. The present study focuses on thin clayey sand turbidites found in Lake Hazar (Turkey) occurring in stacked thin beds. Depositional processes and sources have been previously studied and three types were deciphered, including laminar flows dominated by cohesion, transitional, and turbulence flow regimes (Hage et al., in revision). For the purpose of determine the clay behavior in the three flow regimes, clay mineralogical, geochemical measurements on the cores allow characterising the turbidites. SEM observations provide further information regarding the morphology of clay minerals and other clasts. The study is particularly relevant given the highly alkaline and saline water of the Hazar Lake. Clay minerals in Hazar Lake sediments include kaolinite (1:1-type), illite and chlorite (2:1-type). Hazar lake water is alkaline having pH around 9.3, in such alkaline environment, a cation-exchange reaction takes place. Furthermore, in saline water (16‰), salts can act as a shield and decrease the repulsive forces between clay particle surfaces. So, pH and salt content jointly impact the behaviour of clays differently. Since the Al-faces of clay structures have a negative charge in basic solutions. At high pH, all kaolinite surfaces become negative-charged, and then kaolinite particles are dispersed, and the suspension is stabilized supported by our SEM observations. In alkaline water, kaolinite reveals a lower degree of consolidation. While, alkaline water has no measurable effect on illite and chlorite surface properties due to the absence of modifications in charge. Illite and chlorite form with other clasts clusters or aggregate structures in suspension when the particle interactions are dominated by attractive energies were formed. The aggregate structure plays a major part in the flow behavior of clay suspensions. Flocs will immobilize the suspending medium, and give rise to increasing viscosity and yield strength of the suspension. [less ▲]

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See detailEpithelial lining fluid penetration of temocillin administered by continuous infusion in critically ill patients with nosocomial pneumonia
VISEE, Clotilde ULg; LAYIOS, Nathalie ULg; MISTRETTA, Virginie ULg et al

Conference (2017, April 23)

The administration of 6g per day of temocillin by continuous infusion in critically patients with severe nosocomial pneumonia allows a penetration ratio, measured by the ELF/plasma ratio of AUCs, of 0.14 ... [more ▼]

The administration of 6g per day of temocillin by continuous infusion in critically patients with severe nosocomial pneumonia allows a penetration ratio, measured by the ELF/plasma ratio of AUCs, of 0.14 and 0.57 and a mean (± SE) ELF concentration , in mg/L, of 9.8 ± 1.3 and 9.8 ± 1.6 for total and free drug, respectively. Standard error of AUCs should be calculated by the Bootstrap method and Monte Carlo simulations should be performed for subsequent PK/PD analysis. [less ▲]

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See detailApport de l'ENMG aux syndromes douloureux diffus
WANG, François-Charles ULg

Scientific conference (2017, April 22)

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See detailAre Vitek2 system and E-test relevant and reliable for determining susceptibility to temocillin?
VISEE, Clotilde ULg; FRIPPIAT, Frédéric ULg; DESCY, Julie ULg et al

Poster (2017, April 22)

Compared to BMD, Vitek2® seems to overestimate sensitivity and underestimate resistance, while E-test® seems to overestimate resistance, pleading for the use of BMD when evaluating susceptibility to ... [more ▼]

Compared to BMD, Vitek2® seems to overestimate sensitivity and underestimate resistance, while E-test® seems to overestimate resistance, pleading for the use of BMD when evaluating susceptibility to temocillin. However, this study, which is currently enrolling more patients, will include more isolates in order to meet FDA criteria set out in Cumitech 31A for validation of method comparison [less ▲]

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See detailEtude des traitements numériques de base dans le syndrome 22q11: Impact des troubles visuo-spatiaux
Attout, Lucie ULg; Noël, Marie-Pascale; Vossius, Line ULg et al

Conference (2017, April 22)

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See detail3D investigation into the bust of Akhenaten in the Louvre Museum
Laboury, Dimitri ULg; Mulliez, Maud

Conference (2017, April 22)

Purchased in 1905 by G. Bénédite from the Antiquity market, the unprovenanced limestone bust of Akhenaten now kept in the Louvre Museum (under the inventory number E 11076) is world-famous but, in the end ... [more ▼]

Purchased in 1905 by G. Bénédite from the Antiquity market, the unprovenanced limestone bust of Akhenaten now kept in the Louvre Museum (under the inventory number E 11076) is world-famous but, in the end, rather poorly studied. In the context of an international research project entitled RetroColor 3D (funded by the Région Nouvelle Aquitaine, France, and the University of Bordeaux Montaigne, at Archeovision - UMS 3657 of the CNRS), this exceptional piece of sculpture was investigated anew with the help of 3D reconstruction as a methodological tool. Reporting on this transdisciplinary analysis, the paper will explain how this led to a better understanding of the bust’s original function in the creation of royal portraiture during the so-called Amarna period. [less ▲]

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See detailHistoire d'une métropole industrielle dans l'entre-deux-guerres: Liège
Lanneau, Catherine ULg

Conference given outside the academic context (2017)

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See detailAnalyse spatiale intrasite basée sur un Système d'Information Géographique et appliquée aux vastes sites de plein air du Paléolithique moyen en France septentrionale. L’Exemple de Caours (Somme, France).
Moreau, Gwénaëlle ULg; Locht, Jean-Luc

Conference (2017, April 21)

Durant le Paléolithique moyen, l’alternance entre les périodes glaciaire et interglaciaire a rendu le peuplement de la France septentrionale discontinu. Cette région bénéficie d’un bon cadre ... [more ▼]

Durant le Paléolithique moyen, l’alternance entre les périodes glaciaire et interglaciaire a rendu le peuplement de la France septentrionale discontinu. Cette région bénéficie d’un bon cadre chronostratigraphique permettant l’étude des peuplements néandertaliens. Cependant certains aspects de leurs comportements restent encore mal caractérisés, particulièrement la fonction des sites reste souvent à préciser. L’étude de l’organisation spatiale intrasite apporte des éléments de réponse à ces questions. La fouille d’un site du Paléolithique moyen ne met pas directement en évidence l’organisation spatiale des lieux de vie, une modélisation est nécessaire pour la déceler. Nous avons donc débuté la construction d’un protocole d’analyse spatiale basé sur un Système d’Information Géographique et appuyé sur les sites de Caours. Ce site possède un rôle majeur de par sa superficie et l’excellente préservation des restes fauniques. Nous montrons ici l’existence d’une organisation spatiale sous forme de zones de concentration de vestiges en corrélant plusieurs méthodes – parmi lesquelles le K-mean Clustering et la Kernel Density Estimation. Nous préciserons ensuite la fonction de ces zones au sein d’un espace de vie et leur interaction entre elles au travers de la distribution spatiale des différents vestiges fauniques ou lithiques. [less ▲]

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See detailThe tax on legal entities in the light of civil law: a positive and prospective study of the income taxation for certain actors within the social economy
Garroy, Sabine ULg

Scientific conference (2017, April 21)

Dans le cadre de cette chaire Francqui, plusieurs doctorants belges ont eu l’occasion d’exposer leurs travaux et d’échanger avec le Pr. Dr. Dr.h.c. Wolfgang Schön, au cours de six classes d’excellence ... [more ▼]

Dans le cadre de cette chaire Francqui, plusieurs doctorants belges ont eu l’occasion d’exposer leurs travaux et d’échanger avec le Pr. Dr. Dr.h.c. Wolfgang Schön, au cours de six classes d’excellence dispensées à Liège et Anvers. [less ▲]

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See detailImprovement of genetic evaluation systems for maternally influenced traits and multi-breed livestock populations
Vanderick, Sylvie ULg

Doctoral thesis (2017)

Animal breeding programs are designed to genetically improve livestock populations over many generations to enhance farm sustainability and competitiveness. Genetic improvement is achieved by selecting ... [more ▼]

Animal breeding programs are designed to genetically improve livestock populations over many generations to enhance farm sustainability and competitiveness. Genetic improvement is achieved by selecting genetically superior animals, based on estimated breeding values, to be the parents of the next generation. These estimated breeding values are calculated by solving mixed model equations characterizing appropriate statistical genetic evaluation models. To guarantee effective genetic selection, genetic evaluation models must be tailored to the specific characteristics of the traits and population under evaluation. This PhD thesis focused on the development of genetic evaluation models suitable for categorical maternally influenced traits and for multi-breed populations. Appropriate genetic animal models were developed and assessed: (1) for two categorical maternally influenced traits based on calving ease scores from Walloon Holstein dairy cattle and on lamb survival data from a New Zealand sheep population; (2) for two multi-breed populations based on milk yield records of New Zealand purebred and crossbred dairy cattle, and on purebred and crossbred calving ease scores from Walloon Belgian Blue and Holstein cattle. Results showed that (1) fitting maternal effects was required to avoid biasing the estimated breeding values, and there was no clear advantage in using non-linear mixed models instead of linear mixed models for the genetic analysis of the two categorical maternal traits studied; (2) breed-dependent breeding values could be estimated using the proposed multi-breed models, and that combining purebred and crossbred data had a positive influence on the accuracy of the breeding values of purebred animals. Finally, part of the research presented in this thesis contributed to the development of the genetic evaluation systems currently used in Walloon Region of Belgium and in New Zealand. [less ▲]

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See detailAnalyse Économique des Échanges Intra et Extracommunautaires de l'Union Économique et Monétaire Ouest-Africaine
Soma, Sassiémiké Abdoul Kader ULg

Doctoral thesis (2017)

Résumé de la thèse Le passage de l’Union Économique et Monétaire Ouest-Africaine (UEMOA) à une union douanière en janvier 2000 témoigne de la volonté des pays membres à promouvoir et à intensifier les ... [more ▼]

Résumé de la thèse Le passage de l’Union Économique et Monétaire Ouest-Africaine (UEMOA) à une union douanière en janvier 2000 témoigne de la volonté des pays membres à promouvoir et à intensifier les échanges commerciaux au sein de la zone. Plus de 15 ans après la création de ce vaste marché, les chiffres du commerce intra-communautaire ne sont guère encourageants. En effet, le ratio d’échanges intra-UEMOA stagne autour de 12%, nettement en dessous de ses échanges avec ses partenaires de l’UE et des 7 autres pays de la CEDEAO. La présente thèse a d’abord investigué le poids des barrières dans les échanges intra-UEMOA relativement à celles dans les échanges avec l’Europe et les autres pays de la CEDEAO. Les résultats montrent l’existence de plus de barrières dans les échanges avec l’UE et la CEDEAO que dans les échanges intra-UEMOA. Mieux, la faiblesse des échanges intra-communautaires doit être résorbée moins par la réduction des barrières dans les échanges mutuels que l’amélioration des facteurs d’offre et de demande. Ensuite, nous avons montré que la faiblesse des échanges intra-UEMOA est liée à leur mauvaise structure. En effet, les résultats montrent que les flux croisés de biens similaires entre pays de l’UEMOA sont faibles et leur augmentation permettrait non seulement de stimuler les échanges intra-communautaires, mais également de créer un effet multiplicateur du commerce sur la croissance. Enfin, après avoir analysé la dynamique de la croissance, du commerce et des investissements directs étrangers dans l’UEMOA, nous montrons que s’il existe une dynamique positive de long terme entre la croissance et le commerce, les IDE sont par contre défavorables à la croissance de long terme. Les recommandations vont dans le sens d’orienter davantage les IDE vers les secteurs de transformations capables de générer plus de productivité à long terme. [less ▲]

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See detailDealing with Alexithymia in a Day Psychiatric Hospital - A study identifying significant modulators to promote recovery
Nasello, Julian ULg; Servais, Catherine; Close, Mireille et al

Conference (2017, April 21)

Objective: in this research, we studied changings and modulations of alexithymia [defined by Difficulties in Identifying Feelings (DIF); in Discussing Feelings (DDF) and by an Externally-Oriented Thinking ... [more ▼]

Objective: in this research, we studied changings and modulations of alexithymia [defined by Difficulties in Identifying Feelings (DIF); in Discussing Feelings (DDF) and by an Externally-Oriented Thinking (EOT)]. The purpose was to investigate if Day Psychiatric Hospitalization (DPH) could promote significant improvements on difficulties linked to alexithymia in a population of mood disorders patients (N = 73). Methods & results: a first study showed significant reductions of alexithymia scores. Considered as a personality trait, alexithymia’s changings lead us to promote the relative stability hypothesis, by displaying that moderate to high correlational levels were achieved. A second study revealed the variables impacting significantly on alexithymia. The selected variables were: demographic (i.e. gender; age; number of days of treatment); MMPI-2 variables; and perceived social support (assessed with the MSPSS scale). We found notably a positive effect of perceived social support (PSS) that reduced difficulties associated to alexithymia and other variables that increased alexithymia levels (e.g. antisocial practices, negative attitude to treatment). Conclusion: positive effects of PSS are well known and two main hypotheses were already proposed to explain its effect: PSS acting directly or as a buffer on stressful events. In conclusion, at the one hand, we showed that it is possible to significantly decrease at a certain level a phenomenon such as alexithymia. At the other hand, we enlightened significant modulators of alexithymia that might help therapists to promote or avoid specific aspects for patients involved in a recovery process. [less ▲]

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See detailNon-invasive analysis of mural paintings from a late-Republican house in Ostia
Strivay, David ULg; Morard, Thomas ULg; Herens, Elodie ULg et al

Conference (2017, April 21)

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei ... [more ▼]

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei Bucrani - a house of the end of the Republican era discovered on the site of the Schola del Traiano in Ostia. This domus has undergone several phases of development in the 1st century BC before being destroyed around 20 BC. A new house was immediately rebuilt after a major change from the ground, which allowed exceptional preservation of the decoration system. The results complement our knowledge of Roman painting techniques during the 1st century BC and also provide a comprehensive multidisciplinary approach to the problem of conservation of wall paintings. These two related objectives have been studied using non-destructive testing methods (MA-XRF, FTIR and Raman spectroscopy). The analyses have been performed in situ using our mobile systems. The different set-ups had to be modified in order to be able to work on horizontal surfaces, specially our XRF scanner. The study of the pictorial layers address various issues in the field of archaeology: what technique has been implemented? Does the same technique was used in both phases of the development of the domus? Do they correspond to the techniques described by ancient writers? These responses are compared to those observed in other sets of murals dating from the 1st century BC. [less ▲]

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See detailTax relief on home mortgages: effectiveness, efficiency and equity issues in the Belgian case
Xhignesse, Guillaume ULg

Scientific conference (2017, April 21)

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See detailOrganometallic-mediated radical polymerization of 'less activated monomers': fundamentals, challenges and opportunities
Debuigne, Antoine ULg; Jérôme, Christine ULg; Detrembleur, Christophe ULg

in Polymer (2017), 115

Access to well-defined polymers made of the so-called ‘Less Activated Monomers’ (LAMs) via controlled radical polymerization has long been a challenge due to the lack of radical stabilizing group on the ... [more ▼]

Access to well-defined polymers made of the so-called ‘Less Activated Monomers’ (LAMs) via controlled radical polymerization has long been a challenge due to the lack of radical stabilizing group on the double bond of these monomers. This Feature Article summarizes substantial progress in the organometallic-mediated radical polymerization (OMRP) of this important class of monomers including vinyl esters, olefins, vinyl chloride, vinyl amides, or ionic-liquid vinyl monomers. It aims to provide a clear and comprehensive account of the fundamentals and challenges in the OMRP of LAMs as well as an overview of the resulting macromolecular engineering opportunities. The input of photochemistry, environmentally friendly solvents or flow reactors in OMRP is also presented. Finally, it emphasizes how some well-defined LAMs-based materials contributed to the development of specific applications notably in the fields of biomedicine or energy. [less ▲]

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