References of "2007"
     in
Bookmark and Share    
Full Text
See detailLiberté académique et cour d'arbitrage
Pâques, Michel ULg

in L’humanisme dans la résolution des conflits. Utopie ou réalité ? Liber amicorum Paul Martens (2007)

Detailed reference viewed: 84 (29 ULg)
See detailLa participation du public
Delnoy, Michel ULg

in Haumont, F.; Jadot, B.; Thiebaut, Ch. (Eds.) Urbanisme et environnement (2007)

Detailed reference viewed: 42 (11 ULg)
See detailPulmonary scintigraphy
Votion, Dominique ULg; Lekeux, Pierre ULg

in McGorum, B. C.; Dixon, P. M.; Robinson, N. E. (Eds.) et al Equine Respiratory Medicine and Surgery (2007)

Detailed reference viewed: 29 (6 ULg)
Full Text
Peer Reviewed
See detailCorrecting tensile test results of ECAE-deformed aluminium
Poortmans, Stijn; Boubakar, Diouf; Habraken, Anne ULg et al

in Scripta Materialia (2007), 56(9), 749-752

Performing tensile tests on ECAE material reveals a long post-uniform elongation. In order to calculate correct true stress–true strain diagrams, three different approaches are used: measurements of the ... [more ▼]

Performing tensile tests on ECAE material reveals a long post-uniform elongation. In order to calculate correct true stress–true strain diagrams, three different approaches are used: measurements of the actual sample geometry, a neck evolution model proposed by Segal [V.M. Segal, S Ferrasse, F. Alford, Mater. Sci. Eng. A442 (2006) 321–326] and an inverse modelling method by finite element (FE) simulations. [less ▲]

Detailed reference viewed: 76 (6 ULg)
Full Text
See detailModave, Pont-de-Bonne. Les fortifications du "Rocher du vieux-Château".
Delye, Emmanuel ULg

in Dejardin, Valérie; Maquet, Julien (Eds.) Le patrimoine militaire de Wallonie (2007)

Detailed reference viewed: 160 (7 ULg)
Full Text
Peer Reviewed
See detailHybridization And Morphogenetic Variation In The Invasive Alien Fallopia (Polygonaceae) Complex In Belgium
Tiebre, Ms.; Bizoux, Jean-Philippe ULg; Hardy, Oj. et al

in American Journal of Botany (2007), 94(11), 1900-1910

The invasive alien knotweeds, Fallopia spp. (Polygonaceae), are some of the most troublesome invasive species in Europe and North America. Invasive success in Fallopia may be enhanced by multiple ... [more ▼]

The invasive alien knotweeds, Fallopia spp. (Polygonaceae), are some of the most troublesome invasive species in Europe and North America. Invasive success in Fallopia may be enhanced by multiple hybridization events. We examined the pattern of hybridization and its evolutionary consequences in Belgium with a concerted analysis of ploidy levels (chromosome counts and flow cytometry), morphological variation, and genetic variation (RAPDs). At least four taxa with different ploidy levels were part of the pattern of invasion in Belgium. Hybrid F.3bohemica with various chromosome numbers restored the genotypic diversity that was lacking in the parental species. Hybrid genotypes were mainly assigned to a specific genetic pool and not to a mixture between the genetic pools of the putative parental species as would be expected for hybrids. Parental species and hexaploid hybrids differed significantly for a set of well-defined morphological characters, enabling future researchers to distinguish these taxa. On the basis of our results, the importance of hybridization has probably been underestimated in large parts of the adventive range of alien Fallopia species, pointing to the need for concerted molecular and morphological analyses in the study of the evolutionary consequences of hybridization. [less ▲]

Detailed reference viewed: 38 (2 ULg)
Full Text
Peer Reviewed
See detailValidation of a new finite element for incremental forming simulation using a dynamic explicit approach
Henrard, Christophe ULg; Bouffioux, Chantal ULg; Duchene, Laurent ULg et al

in Key Engineering Materials [=KEM] (2007), 344

A new method for modeling the contact between the tool and the metal sheet for the incremental forming process was developed based on a dynamic explicit time integration scheme. The main advantage of this ... [more ▼]

A new method for modeling the contact between the tool and the metal sheet for the incremental forming process was developed based on a dynamic explicit time integration scheme. The main advantage of this method is that it uses the actual contact location instead of fixed positions, e.g. integration or nodal points. The purpose of this article is to compare the efficiency of the new method, as far as accuracy and computation time are concerned, with finite element simulations using a classic static implicit approach. In addition, a sensitivity analysis of the mesh density will show that bigger elements can be used with the new method compared to those used in classic simulations. [less ▲]

Detailed reference viewed: 98 (16 ULg)
See detailNotions d'histoire de l'art et archéologie: Orient ancien
Van der Stede, Véronique ULg

Learning material (2007)

 Syllabus destiné aux étudiants de 2e et 3e année de BA. Il reprend la matière présentée dans le cadre du cours de « Notions d’histoire de l’art et d’archéologie : orient ancien », soit une sélection des ... [more ▼]

 Syllabus destiné aux étudiants de 2e et 3e année de BA. Il reprend la matière présentée dans le cadre du cours de « Notions d’histoire de l’art et d’archéologie : orient ancien », soit une sélection des artefacts et des vestiges les plus significatifs de la période comprise entre le Natoufien et le milieu du 1er millénaire av. n. è. Cette documentation archéologique est replacée dans son contexte historique et géographique. [less ▲]

Detailed reference viewed: 62 (1 ULg)
Full Text
Peer Reviewed
See detailConformational and thermodynamic changes of the repressor/DNA operator complex upon monomerization shed new light an regulation mechanisms of bacterial resistance against beta-lactam antibiotics
Boudet, J.; Duval, V.; Van Melckebeke, H. et al

in Nucleic Acids Research (2007), 35(13), 4384-4395

In absence of beta-lactam antibiotics, Blal and Mecl homodimeric repressors negatively control the expression of genes involved in P-lactam resistance in Bacillus licheniformis and in Staphylococcus ... [more ▼]

In absence of beta-lactam antibiotics, Blal and Mecl homodimeric repressors negatively control the expression of genes involved in P-lactam resistance in Bacillus licheniformis and in Staphylococcus aureus. Subsequently to P-lactam presence, Blal/Mecl is inactivated by a single-point proteolysis that separates its N-terminal DNA-binding domain to its C-terminal domain responsible for its dimerization. Concomitantly to this proteolysis, the truncated repressor acquires a low affinity for its DNA target that explains the expression of the structural gene for resistance. To understand the loss of the high DNA affinity of the truncated repressor, we have determined the different dissociation constants of the system and solved the solution structure of the B. licheniformis monomeric repressor complexed to the semi-operating sequence OP1, of blaP (1/20P(1)blaP) by using a de novo docking approach based on inter-molecular nuclear Overhauser effects and chemical-shift differences measured on each macromolecular partner. Although the N-terminal domain of the repressor is not subject to internal structural rearrangements upon DNA binding, the molecules adopt a tertiary conformation different from the crystallographic operator-repressor dimer complex, leading to a 300 rotation of the monomer with respect to a central axis extended across the DNA. These results open new insights for the repression and induction mechanisms of bacterial resistance to beta-lactams. [less ▲]

Detailed reference viewed: 17 (2 ULg)
Full Text
Peer Reviewed
See detailTHE DIOXIN FUNCTION AS A USEFUL TOOL FOR ASSESSING DIOXIN LABORATORY PERFORMANCES IN PROFICIENCY TESTS
Eppe, Gauthier ULg; Van Cleuvenbergen, Rudy; Smastuen Haug, Line et al

in Organohalogen Compounds (2007)

Detailed reference viewed: 13 (1 ULg)
Peer Reviewed
See detailApproche écologique de la mémoire de travail : application dans le cadre professionnel
LEPUITS, Géraldine ULg; DEMOULIN, Valentine ULg

in Aubin, guislaine (Ed.) Neuropsychologie de la mémoire de travail (2007)

Detailed reference viewed: 79 (11 ULg)
Full Text
Peer Reviewed
See detailPossibilités d'amélioration de la principale espèce cultivée de cotonnier (Gossypium hirsutum L.) pour la résistance au nématode reniforme (Rotylenchulus reniformis Linford et Oliveira).
Konan, N'guessan ULg; Mergeai, Guy ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2007), 11(2), 159-171

Detailed reference viewed: 21 (2 ULg)
Full Text
Peer Reviewed
See detailDifferential effects of hypoxia on etoposide-induced apoptosis according to the cancer cell lines
Cosse, Jean-Philippe ULg; Sermeus, Audrey; Vannuvel, Kayleen et al

in Molecular Cancer (2007)

Background: It is more and more recognized that hypoxia plays a role in the resistance of cancer cells to chemotherapy. However, the mechanisms underlying this resistance still need deeper understanding ... [more ▼]

Background: It is more and more recognized that hypoxia plays a role in the resistance of cancer cells to chemotherapy. However, the mechanisms underlying this resistance still need deeper understanding. The aim of this study was to investigate the effect of hypoxia on this process since hypoxia is one of the hallmarks of tumor environment. Results: The effect of hypoxia on the apoptosis induced by etoposide, one drug commonly used in chemotherapy, was investigated using three different cancer cell lines. Gene expression changes were also studied in order to delineate the mechanisms responsible for the hypoxia-induced chemoresistance. We observed that hypoxia differentially influenced etoposide-induced cell death according to the cancer cell type. While hypoxia inhibited apoptosis in hepatoma HepG2 cells, it had no influence in lung carcinoma A549 cells and further enhanced it in breast cancer MCF-7 cells. Etoposide increased p53 activity in all cell lines while hypoxia alone decreased it only in HepG2 cells. Hypoxia had no influence on the etoposide-induced p53 activity in A549, increased p53 abundance in MCF-7 cells but markedly decreased p53 activity in HepG2 cells. Using low density DNA arrays to detect the expression of genes involved in the regulation of apoptosis, etoposide and hypoxia were shown to each influence the expression of numerous genes, many of the ones influenced by etoposide being p53 target genes. Again, the influence of hypoxia on the etoposideinduced changes was different according to the cell type. Conclusion: These results evidenced that there was a striking parallelism between the effect of hypoxia on the etoposide-induced p53 stabilization as well as p53 target gene expression and its effect on the etoposide-induced apoptosis according to the cell type. They are very interesting not only because they provide one possible mechanism for the induction of chemoresistance under hypoxic conditions in cells like HepG2 but also because they indicate that not all cell types respond the same way. This knowledge is of importance in designing adequate treatment according to the type of tumors. [less ▲]

Detailed reference viewed: 34 (1 ULg)
Full Text
Peer Reviewed
See detailClinical Protection against Caprine Herpesvirus 1 Genital Infection by Intranasal Administration of a Live Attenuated Glycoprotein E Negative Bovine Herpesvirus 1 Vaccine
Thiry, Julien ULg; Tempesta, M.; Camero, M. et al

in BMC Veterinary Research (2007), 3

BACKGROUND: Caprine herpesvirus 1 (CpHV-1) is responsible of systemic diseases in kids and genital diseases leading to abortions in goats. CpHV-1 is widespread and especially in Mediterranean countries as ... [more ▼]

BACKGROUND: Caprine herpesvirus 1 (CpHV-1) is responsible of systemic diseases in kids and genital diseases leading to abortions in goats. CpHV-1 is widespread and especially in Mediterranean countries as Greece, Italy and Spain. CpHV-1 is antigenically and genetically closely related to bovine herpesvirus 1 (BoHV-1). Taking into account the biological properties shared by these two viruses, we decided in the current study to assess the protection of a live attenuated glycoprotein E (gE) negative BoHV-1 vaccine against a genital CpHV-1 infection in goats. RESULTS: The vaccine was inoculated intranasally twice three weeks apart followed by a subsequent CpHV-1 intravaginal challenge which is the natural route of infection in three goats. To analyse the safety and the efficacy of this marker vaccine, two groups of three goats served as controls: one immunised with a virulent CpHV-1 and one uninoculated until the challenge. Goats were clinically monitored and all sampling procedures were carried out in a blind manner. The vaccine did not induce any undesirable local or systemic reaction and goats did not excrete gE-negative BoHV-1. After challenge, a significant reduction in disease severity was observed in immunised goats. Moreover, goats immunised with either gE-negative BoHV-1 or CpHV-1 exhibited a significant reduction in the length and the peak of viral excretion. Antibodies neutralising both BoHV-1 and CpHV-1 were raised in immunised goats. CONCLUSION: Intranasal application of a live attenuated gE-negative BoHV-1 vaccine is able to afford a clinical protection and a reduction of virus excretion in goats challenged by a CpHV-1 genital infection. [less ▲]

Detailed reference viewed: 24 (2 ULg)
Full Text
Peer Reviewed
See detailBiomass production in experimental grasslands of different species richness during three years of climate warming
de Boeck, H. J.; Lemmens, CMHM; Gielen, B. et al

in Biogeosciences Discussions (2007), 4

Here we report on the single and combined impacts of climate warming and species richness on the biomass production in experimental grassland communities. Projections of a future warmer climate have ... [more ▼]

Here we report on the single and combined impacts of climate warming and species richness on the biomass production in experimental grassland communities. Projections of a future warmer climate have stimulated studies on the response of terrestrial ecosystems to this global change. Experiments have likewise addressed the importance of species numbers for ecosystem functioning. There is, however, little knowledge on the interplay between warming and species richness. During three years, we grew experimental plant communities containing one, three or nine grassland species in 12 sunlit, climate-controlled chambers in Wilrijk, Belgium. Half of these chambers were exposed to ambient air temperatures (unheated), while the other half were warmed by 3 degrees C (heated). Equal amounts of water were added to heated and unheated communities, so that warming would imply drier soils if evapotranspiration was higher. Biomass production was decreased due to warming, both aboveground (-29%) and belowground (-25%), as negative impacts of increased heat and drought stress in summer prevailed. Complementarity effects, likely mostly through both increased aboveground spatial complementarity and facilitative effects of legumes, led to higher shoot and root biomass in multi-species communities, regardless of the induced warming. Surprisingly, warming suppressed productivity the most in 9-species communities, which may be attributed to negative impacts of intense interspecific competition for resources under conditions of high abiotic stress. Our results suggest that warming and the associated soil drying could reduce primary production in many temperate grasslands, and that this will not necessarily be mitigated by efforts to maintain or increase species richness. [less ▲]

Detailed reference viewed: 34 (7 ULg)
Full Text
See detailAn Ageing Burden Indicator
Lefebvre, Mathieu ULg; Perelman, Sergio ULg

in Marin, B.; Zaidi, A. (Eds.) Mainstreaming Ageing. Indicators to Monitor Sustainable Policies (2007)

In this chapter we propose a simple framework to compute a burden indicator to be used in the ageing sustainability debate. Relying on the projections of population as well as on the employment rate and ... [more ▼]

In this chapter we propose a simple framework to compute a burden indicator to be used in the ageing sustainability debate. Relying on the projections of population as well as on the employment rate and the generosity of the systems, it offers the possibility to anticipate the main reforms to be accomplished in order to share the burden of the pay-as-you-go schemes between generations [less ▲]

Detailed reference viewed: 37 (9 ULg)