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See detailFunctional imaging of abdominal aortic aneurysms
Sakalihasan, Natzi ULg; Hustinx, Roland ULg; Gomez, Pierre et al

in Aortic Aneurysms, new insights of an old problem (2008)

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See detailprésentation de la réimpression de : Roersch-Thomas-Hombert, Eléments de grammaire grecque
Rochette, Bruno ULg

in Bulletin de la Fédération des Professeurs de Grec et de Latin (2008), 163(janvier-février),

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See detailEvidence of a highly complex phylogeographic structure on a specialist river bird species, the dipper (Cinclus cinclus).
Hourlay, F.; Libois, Roland ULg; D'Amico, F. et al

in Molecular Phylogenetics & Evolution (2008), 49(2), 435-44

This study details the phylogeographic pattern of the white-throated dipper (Cinclus cinclus), a Palearctic, temperate, passerine bird that is exclusively associated with flowing water. Our results reveal ... [more ▼]

This study details the phylogeographic pattern of the white-throated dipper (Cinclus cinclus), a Palearctic, temperate, passerine bird that is exclusively associated with flowing water. Our results reveal a complex phylogeographic structure with at least five distinct lineages for the Western Palearctic region. As for many species of the Western Palearctic fauna and flora, this genetic structure is probably linked to the isolation of populations in different southern refuges during glacial periods. Furthermore, the isolation of populations in Scandinavia and/or Eastern regions, but also in Morocco and probably in Corsica, was accentuated by ecological and biogeographic barriers during Quaternary interglacial periods. During glacial periods, Italy, Sicily and the Balkano-Carpathian region acted as major refuge zones for the dipper. At the end of the last ice age, Western Europe was repopulated by dippers from an Italian refuge, while Eastern Europe was recolonised by Balkano-Carpathian birds. A large contact zone between these two lineages was evidenced and extends from Luxembourg to Hungary. Finally, our results indicate the need to clarify the taxonomic status of the dipper, especially concerning the European subspecies whose validity appears uncertain. [less ▲]

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See detailLa sociologie de l'action publique
Levêque, Audrey ULg

in Jacquemain, Marc; Frère, Bruno (Eds.) Epistémologie de la sociologie. Paradigmes pour le XXIè siècle. (2008)

Introduction à la sociologie de l'action publique, cette contribution retrace les grandes lignes de la naissance, de la définition et des étapes de l'analyse des politiques publiques ainsi que son ... [more ▼]

Introduction à la sociologie de l'action publique, cette contribution retrace les grandes lignes de la naissance, de la définition et des étapes de l'analyse des politiques publiques ainsi que son évolution vers l'action publique. [less ▲]

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See detailG_CUBE: un logiciel simple pour le cubage des arbres et des peuplements forestiers
Lejeune, Philippe ULg; Hebert, Jacques ULg; Rondeux, Jacques ULg

in Silva Belgica (2008), 115(2), 16-18

G_Cube est un logiciel de cubage d'arbres sur pied ou abattus fonctionnant dans l'environnement Microsoft® Excel. Il donne accès aux principaux barèmes de cubage (défilement, décroissance), ainsi qu'aux ... [more ▼]

G_Cube est un logiciel de cubage d'arbres sur pied ou abattus fonctionnant dans l'environnement Microsoft® Excel. Il donne accès aux principaux barèmes de cubage (défilement, décroissance), ainsi qu'aux équations de cubage adaptées à la Région wallonne. Il permet également de procéder à une estimation de la valeur des lots et intègre un module simplifié de traitement de données d'inventaire par échantillonnage. [less ▲]

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See detailSimplifying strong electronic correlations in uranium: Localized uranium heavy-fermion UM(2)Zn(20) (M = Co, Rh) compounds
Bauer, E. D.; Wang, C.; Fanelli, V. R. et al

in Physical Review. B : Condensed Matter (2008), 78(11),

The physical properties including magnetic susceptibility, magnetization, specific heat, and dynamic susceptibility chi ''(E) are reported for single crystals of the cubic UM(2)Zn(20) (M = Co, Rh ... [more ▼]

The physical properties including magnetic susceptibility, magnetization, specific heat, and dynamic susceptibility chi ''(E) are reported for single crystals of the cubic UM(2)Zn(20) (M = Co, Rh) materials. Maxima in the thermodynamic data at T(max) similar to 10 K for both compounds and a broad peak in chi ''(E) at 5 K in UCo(2)Zn(20) of width Gamma=5 meV indicate a heavy-fermion state characterized by a Kondo temperature T(K) similar to 20-30 K arising from weak hybridization of f- and conduction-electron states. Anderson impurity model fits to the data in the Kondo limit including crystalline electric-field effects corroborate an ionic-like uranium electronic configuration in UM(2)Zn(20). [less ▲]

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See detailEffect of temperature increase on the courtship behavior and the fitness in the Palmate newt
Galloy, Valérie ULg; Lo Presti, Wendy; Denoël, Mathieu ULg

Poster (2008)

A trend in global warming is now undeniable. Increases of global temperatures have resulted in measurable shifts in the distribution, phenology and survival of some plant and animal species. However, the ... [more ▼]

A trend in global warming is now undeniable. Increases of global temperatures have resulted in measurable shifts in the distribution, phenology and survival of some plant and animal species. However, the mechanisms showing the link between global warming and declines remain unclear. The aim of this study was to examine whether courtship displays and fitness could be affected by a temperature increase. To this end, we compared the sexual behavior and egg-laying traits at naturally occurring temperatures (14 C, 18 C and 22 C) in palmate newts (Triturus helveticus). First, our results underline the importance of female role in the male courtships. The majority of male behaviors are affected by the female responsiveness, which is temperature dependent. They also show that water temperature increase has a negative effect on the fecundity of female newts. Females lay half as many eggs at high temperatures as they do at low temperatures and of these only one third hatch. The demonstration of such a detrimental effect shows that more experimental studies are required to understand the proximate mechanisms of global warming. [less ▲]

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See detailStatus and causes of decline in heterochronic newts from Europe
Denoël, Mathieu ULg; Dzukic, Georg; Ficetola, Gentile et al

Conference (2008)

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See detailReverse and Conventional Chemical Ecology Approaches for the Development of Oviposition Attractants for Culex Mosquitoes
Leal, Walter S.; Barbosa, Rosângela M. R.; Xu, Wei et al

in PLoS ONE (2008), 3

Synthetic mosquito oviposition attractants are sorely needed for surveillance and control programs for Culex species, which are major vectors of pathogens causing various human diseases, including ... [more ▼]

Synthetic mosquito oviposition attractants are sorely needed for surveillance and control programs for Culex species, which are major vectors of pathogens causing various human diseases, including filariasis, encephalitis, and West Nile encephalomyelitis. We employed novel and conventional chemical ecology approaches to identify potential attractants, which were demonstrated in field tests to be effective for monitoring populations of Cx. p. quinquefasciatus in human dwellings. Immunohistochemistry studies showed that an odorant-binding protein from this species, CquiOBP1, is expressed in trichoid sensilla on the antennae, including short, sharp-tipped trichoid sensilla type, which house an olfactory receptor neuron sensitive to a previously identified mosquito oviposition pheromone (MOP), 6-acetoxy-5-hexadecanolide. CquiOBP1 exists in monomeric and dimeric forms. Monomeric CquiOBP1 bound MOP in a pH-dependent manner, with a change in secondary structure apparently related to the loss of binding at low pH. The pheromone antipode showed higher affinity than the natural stereoisomer. By using both CquiOBP1 as a molecular target in binding assays and gas chromatography-electroantennographic detection (GC-EAD), we identified nonanal, trimethylamine (TMA), and skatole as test compounds. Extensive field evaluations in Recife, Brazil, a region with high populations of Cx. p. quinquefasciatus, showed that a combination of TMA (0.9 µg/l) and nonanal (0.15 ng/µl) is equivalent in attraction to the currently used infusion-based lure, and superior in that the offensive smell of infusions was eliminated in the newly developed synthetic mixture. [less ▲]

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See detailGene expression profiling of hypothalamic hamartomas: a search for genes associated with central precocious puberty
Parent, Anne-Simone ULg; Matagne, Valérie; Westphal, Manfred et al

in Hormone Research (2008), 69

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See detailRecent discoveries of new hantaviruses widen their range and question their origins.
Henttonen, Heikki; Buchy, Philippe; Suputtamongkol, Yupin et al

in Annals of the New York Academy of Sciences (2008), 1149

Hantaviruses belong to the Bunyaviridae family. While usually hosted by wild mammals, they are potentially pathogenic for humans, and several serologically distinct groups associated with different ... [more ▼]

Hantaviruses belong to the Bunyaviridae family. While usually hosted by wild mammals, they are potentially pathogenic for humans, and several serologically distinct groups associated with different syndromes have been identified. Yet, investigations have mostly been conducted where human infections by hantaviruses constitute a real and well-identified public health problem, i.e., the holarctic and neotropical areas. Some hantaviruses have also been described from a Suncus murinus in India and a Bandicota indica in Thailand. In addition, recent investigations in Cambodia revealed new Hantavirus types. More recently, two new Hantavirus species were described: Sangassou from a Hylomyscus simus, and Tanganya from a Crocidura theresae, both from Africa (Guinea), thus strongly questioning the current views about geographic range, evolution, and epidemiology of hantaviruses. In such a framework, we have conducted a survey of Hantavirus diversity in Southeast Asia which allows us to isolate the Thailand virus and address questions about the taxonomy of their rodent hosts. Here we present a molecular analysis of representatives of all currently known Hantavirus species, thus allowing the comparison between the newly described ones with a large range sample of rodent hantaviruses. Our results clearly point to the presence of a particular lineage of hantaviruses in Southeast Asia. It also strongly suggests that new viruses, additional mammalian hosts and different related syndromes in humans are likely to be discovered in the near future, particularly in Southeast Asia and in Africa, where Muridae rodents are highly diversified. Furthermore, additional work is also urgently needed to investigate the hantaviruses associated with Crociduridae and Soricidae. [less ▲]

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See detail2-Aminopropane-1,2,3-tricarboxylic acid: Synthesis and co-crystallization with the class A beta-lactamase BS3 of Bacillus licheniformis.
Beck, Josephine; Sauvage, Eric ULg; Charlier, Paulette ULg et al

in Bioorganic & Medicinal Chemistry Letters (2008), 18(13), 3764-8

The title compound 4 has been prepared in four steps from ethylglycinate in 63% overall yield. This amino analog of citric acid has been co-crystallized with the class A beta-lactamase BS3 of Bacillus ... [more ▼]

The title compound 4 has been prepared in four steps from ethylglycinate in 63% overall yield. This amino analog of citric acid has been co-crystallized with the class A beta-lactamase BS3 of Bacillus licheniformis and the structure of the complex fully analyzed by X-ray diffraction. Tris-ethyl aminocitrate 3 and the free tris-acid 4 have been tested against a member beta-lactamase from all distinct subgroups. They are novel inhibitors of class A beta-lactamases, still modest but more potent than citrate and isocitrate. [less ▲]

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See detailCrystal structures of complexes of bacterial DD-peptidases with peptidoglycan-mimetic ligands: the substrate specificity puzzle.
Sauvage, Eric ULg; Powell, Ailsa J; Heilemann, Jason et al

in Journal of Molecular Biology (2008), 381(2), 383-93

The X-ray crystal structures of covalent complexes of the Actinomadura R39 dd-peptidase and Escherichia coli penicillin-binding protein (PBP) 5 with beta-lactams bearing peptidoglycan-mimetic side chains ... [more ▼]

The X-ray crystal structures of covalent complexes of the Actinomadura R39 dd-peptidase and Escherichia coli penicillin-binding protein (PBP) 5 with beta-lactams bearing peptidoglycan-mimetic side chains have been determined. The structure of the hydrolysis product of an analogous peptide bound noncovalently to the former enzyme has also been obtained. The R39 DD-peptidase structures reveal the presence of a specific binding site for the D-alpha-aminopimelyl side chain, characteristic of the stem peptide of Actinomadura R39. This binding site features a hydrophobic cleft for the pimelyl methylene groups and strong hydrogen bonding to the polar terminus. Both of these active site elements are provided by amino acid side chains from two separate domains of the protein. In contrast, no clear electron density corresponding to the terminus of the peptidoglycan-mimetic side chains is present when these beta-lactams are covalently bound to PBP5. There is, therefore, no indication of a specific side-chain binding site in this enzyme. These results are in agreement with those from kinetics studies published earlier and support the general prediction made at the time of a direct correlation between kinetics and structural evidence. The essential high-molecular-mass PBPs have demonstrated, to date, no specific reactivity with peptidoglycan-mimetic peptide substrates and beta-lactam inhibitors and, thus, probably do not possess a specific substrate-binding site of the type demonstrated here with the R39 DD-peptidase. This striking deficiency may represent a sophisticated defense mechanism against low-molecular-mass substrate-analogue inhibitors/antibiotics; its discovery should focus new inhibitor design. [less ▲]

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See detailL’édition pour la jeunesse en Belgique francophone : de l’imprimerie à la mondialisation
Habrand, Tanguy ULg; Defourny, Michel ULg

in Pinhas, Luc (Ed.) Situations de l'édition francophone d'enfance et de jeunesse (2008)

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See detailConservation of newt guilds in an agricultural landscape of Belgium: the importance of aquatic and terrestrial habitats
Denoël, Mathieu ULg; Ficetola, G. Francesco

in Aquatic Conservation (2008), 18(5), 714-728

1. Amphibians are declining worldwide in response to local and global pressures. Pond-breeding species are particularly vulnerable to environmental change because they rely on two components of the ... [more ▼]

1. Amphibians are declining worldwide in response to local and global pressures. Pond-breeding species are particularly vulnerable to environmental change because they rely on two components of the landscape: aquatic and terrestrial habitats. Agricultural practices are changing rapidly at world and local scales. As a consequence, farm ponds and their surrounding terrestrial landscapes will probably be affected. 2. This study investigated the main habitat determinants for the occurrence of four species of newts (genus Triturus) inhabiting the Pays de Herve, a rural area in Belgium. Newt occurrence was determined for 258 ponds and the effect of habitat on distribution determinants was evaluated using generalized linear models. 3. Newts were found in 42% of the ponds. Contrary to expectations, the distribution of newts was not positively associated with a high density of ponds. However, a low occurrence of newts and the low water depth of many ponds suggest a low quality of habitats. Proximity to forest, deep water, and an absence of fish in ponds are factors that significantly favour newts, but terrestrial habitat requirements vary among species. 4. These results indicate the necessity of maintaining both forest and meadow patches in close proximity to ponds inhabited by newts., and of controlling fish introduction in those ponds. These findings stress the importance of conservation and management of terrestrial and aquatic habitats for maintaining amphibian diversity. Copyright (c) 2007 John Wiley & Sons, Ltd. [less ▲]

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See detailImprovement of Autobiographical Memory in Schizophrenia Patients Following a Cognitive Intervention: A Preliminary Study.
Blairy, Sylvie ULg; Neumann, Aurore; Nutthals, Frédérique et al

in Psychopathology (2008), 41

Background: Schizophrenia is associated with a reduction in accessing specific autobiographical information. This is consistent with the abnormal development of the personal identity characterizing this ... [more ▼]

Background: Schizophrenia is associated with a reduction in accessing specific autobiographical information. This is consistent with the abnormal development of the personal identity characterizing this mental disorder. The present study evaluates the effect of a cognitive intervention on autobiographical memory and on the capacity to project oneself in the future in people suffering from schizophrenia. Sampling and Method: The intervention consisted of group sessions during which participants were trained to recollect specific events reported in their diary. Further, exercises to stimulate their thoughts on their personal identity were proposed. An AM test was administrated before and after the intervention, as well as at three months follow-up. Further, neuropsychological and affective assessments were conducted before and after treatments. Patients’ performances were compared to those from the control group Results: The capacities to generate specific events are improved by the cognitive intervention, and that the benefits are preserved 3 months later. However, no neuropsychological or affective benefit was found. Conclusion: Despite positive results on specific memory, the significant benefits have to be extended to other clinical variables such as symptom reduction, neuropsychological and social functioning. Nevertheless, the results revealed that CRT on AM could be a useful additional intervention for schizophrenia patients. [less ▲]

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See detailBioaccumulation of persistent organic pollutants in female common dolphins (Delphinus delphis) and harbour porpoises (Phocoena phocoena) from western European seas: geographical trends, causal factors and effects on reproduction and mortality
Pierce, G. J.; Santos, M. B.; Murphy, S. et al

in Environmental Pollution (2008), 153(2), 401-415

female common dolphins and harbour porpoises from the Atlantic coast of Europe were frequently above the threshold at which effects on reproduction could be expected, in 40% and 47% of cases respectively ... [more ▼]

female common dolphins and harbour porpoises from the Atlantic coast of Europe were frequently above the threshold at which effects on reproduction could be expected, in 40% and 47% of cases respectively. This rose to 74% for porpoises from the southern North Sea. PCB concentrations were also high in southern North Sea fish. The average pregnancy rate recorded in porpoises (42%) in the study area was lower than in the western Atlantic but that in common dolphins (25%) was similar to that of the western Atlantic population. Porpoises that died from disease or parasitic infection had higher concentrations of persistent organic pollutants (POPs) than animals dying from other causes. Few of the common dolphins sampled had died from disease or parasitic infection. POP profiles in common dolphin blubber were related to individual feeding history while those in porpoises were more strongly related to condition. High PCB levels were recorded in porpoises and common dolphins from European coasts. [less ▲]

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See detailEtude de l'âge et de la croissance chez Clarias gariépinus (Pisces, Clariidae) dans le delta de l'Ouémé au Bénin (Afrique de l'Ouest)
Lalèyè, Philippe; Raemakers, Valérie; Vandewalle, Pierre ULg et al

in International Journal of Biological and Chemical Sciences (2008), 2(2), 157-167

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See detailEnsayos de germinación y análisis de viabilidad y vigor en semillas
Rodriguez Quilón, Isabel; Adam, Gilles ULg; Durán, José María

Article for general public (2008)

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