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See detailRelation Between The Low Temperature Stress And Catalase Activity In Gladiolus Somaclones (Gladiolus Grandiflorus Hort.)
Bettaieb, T.; Mahmoud, M.; De Galarreta, Jir. et al

in Scientia Horticulturae (2007), 113(1),

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See detailSynthèse de chélateurs bifonctionnels en vue du développement d’agents de contraste pour l’IRM
Thonon, David ULg; Paris, Jérôme; Jacques, Vincent et al

Conference (2007)

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See detailTelepresence based on remote real time control of a robot with brain waves
Grave de Peralta, R.; Noirhomme, Quentin ULg; Philips, J. et al

in Moreno, L. (Ed.) Annual Conference Proceedings, PRESENCE 2007 (2007)

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See detailReduction in bone turnover results in a transient highly uniform mineralization state
Ruffoni, Davide ULg; Fratzl, P.; Roschger, P. et al

in CALCIFIED TISSUE INTERNATIONAL (2007), 80(1), 146-146

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See detailSound production mechanism in the clownfish Amphiprion clarkii (Amphiprioninae, Pomacentridae)
Colleye, Orphal ULg; Herrel, Anthony; Mauguit, Quentin et al

in Journal of Morphology (2007), 268(12), 1061

Clownfishes live in social group within sea anemones. They are prolific “singers” that produce a wide variety of sounds, described as “pops” and “chirps”, involved in both reproductive and agonistic ... [more ▼]

Clownfishes live in social group within sea anemones. They are prolific “singers” that produce a wide variety of sounds, described as “pops” and “chirps”, involved in both reproductive and agonistic interactions. Although clownfish sounds were recorded since 1930, the mechanism of sound production has remained unresolved. <br />The sounds used to describe the sonic mechanism were directed towards hetero- and conspecifics that approach their sea anemone host. Sound recordings were synchronized using a high speed video (500 fps) coupled or not with an X-ray system. These systems allowed to quantify the movements of external and internal bones during sound production. Sounds were typically accompanied by rapid (< 30 ms) head movements such as elevation of the skull, lowering of the hyoid bar and the anterior part of the branchial basket, retraction of the pectoral girdle, and finally closing of the mouth. Synchronization of sound pulses with X-ray images indicates that sound is produced when the hyoid apparatus is completely lowered and the mouth closed by a previously unknown mechanism. <br />Dissections of freshly dead specimens reveal an unusual ligament responsible for the rapid mouth closing. This ligament joins the hyoid bar to the internal part of the mandible. Acting as a cord, it forces the mandible to turn around its articulation during the lowering of the anterior part of the branchial basket, forcing the mouth to close. Sounds result from the collision of the jaw teeth, transferring energy to the jaws that are presumably the sound radiator. [less ▲]

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See detailVaricella-zoster virus modulates NF-kappaB recruitment on selected cellular promoters.
El Mjiyad, Nadia ULg; Bontems, Sébastien ULg; Gloire, Geoffrey ULg et al

in Journal of Virology (2007), 81(23), 13092-104

Intercellular adhesion molecule 1 (ICAM-1) expression is down-regulated in the center of cutaneous varicella lesions despite the expression of proinflammatory cytokines such as gamma interferon and tumor ... [more ▼]

Intercellular adhesion molecule 1 (ICAM-1) expression is down-regulated in the center of cutaneous varicella lesions despite the expression of proinflammatory cytokines such as gamma interferon and tumor necrosis factor alpha (TNF-alpha). To study the molecular basis of this down-regulation, the ICAM-1 induction of TNF-alpha was analyzed in varicella-zoster virus (VZV)-infected melanoma cells (MeWo), leading to the following observations: (i) VZV inhibits the stimulation of icam-1 mRNA synthesis; (ii) despite VZV-induced nuclear translocation of p65, p52, and c-Rel, p50 does not translocate in response to TNF-alpha; (iii) the nuclear p65 present in VZV-infected cells is no longer associated with p50 and is unable to bind the proximal NF-kappaB site of the icam-1 promoter, despite an increased acetylation and accessibility of the promoter in response to TNF-alpha; and (iv) VZV induces the nuclear accumulation of the NF-kappaB inhibitor p100. VZV also inhibits icam-1 stimulation of TNF-alpha by strongly reducing NF-kappaB nuclear translocation in MRC5 fibroblasts. Taken together, these data show that VZV interferes with several aspects of the immune response by inhibiting NF-kappaB binding and the expression of target genes. Targeting NF-kappaB activation, which plays a central role in innate and adaptive immune responses, leads to obvious advantages for the virus, particularly in melanocytes, which are a site of viral replication in the skin. [less ▲]

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See detailLes projets DEDA et FIRDES au sein l’Université de Ouagadougou : initiatives d’interface entre université et société civile ? Une Analyse entre théorie et pratique
Wouango, Joséphine ULg

Master of advanced studies dissertation (2007)

Depuis la fin des années 1990, l’Université de Ouagadougou au Burkina Faso connait un certain nombre de vicissitudes qui affectent, entre autres, ses rapports avec la société burkinabé. Dans le souci de ... [more ▼]

Depuis la fin des années 1990, l’Université de Ouagadougou au Burkina Faso connait un certain nombre de vicissitudes qui affectent, entre autres, ses rapports avec la société burkinabé. Dans le souci de répondre de façon efficace aux attentes de cette société, elle tente d’initier en son sein des actions plus cohérentes avec cette demande sociale. Les projets DEDA (Développement et Education des Adultes) et FIRDES (Formation, Information et Recherche-Développement en Economie Sociale) sont de ces initiatives universitaires qui disent développer des démarches novatrices intégrant les préoccupations de ce qu’on appelle aujourd’hui la « société civile », même si elles ont des logiques de conception et de fonctionnement différentes. Ce mémoire essaie d’interroger ces deux projets dans leur théorie, dans leur pratique et sur tous les plans, pour y déceler des actions concrètes qui traduisent la spécificité de leurs démarches en termes de formation, de recherche et surtout de prise en compte des attentes de la « société civile ». Il questionne aussi la pluralité de logiques et stratégies des acteurs autour de ces projets et ce que cela implique pour l’action de chaque projet. L’axe majeur de ce travail est de montrer les projets DEDA et FIRDES, au-delà des éléments qui les différencient, consacrent une place à la « société civile » (mais pas uniquement à elle) dans leurs pratiques mais que cela se fait au prix de négociation, voire de stratégies de « contournement » face à une Université de Ouagadougou dite réticente, alors qu’elle tient le même discours que les deux projets. Cela est encore vrai pour le projet DEDA et témoigne de sa complexité. [less ▲]

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See detailCaryl Phillips and the Caribbean as Multicultural Paradigm
Ledent, Bénédicte ULg

in Moving Worlds : A Journal of Transcultural Writings (2007), 7(1), 74-84

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See detailLa co-construction de soi et de ses savoirs professionnels comme effet de l'alternance: quels indicateurs?
Vanhulle, Sabine; Mottier Lopez, Lucie; Deum, Mélanie ULg

in Merhan, France; Ronveaux, Christophe; Vanhulle, Sabine (Eds.) Alternances en formation (2007)

Cette contribution porte sur la construction de savoirs professionnels dans l'alternance en formation initiale à l'enseignement. Elle postule que cette construction de savoirs se relie à l'émergence de l ... [more ▼]

Cette contribution porte sur la construction de savoirs professionnels dans l'alternance en formation initiale à l'enseignement. Elle postule que cette construction de savoirs se relie à l'émergence de l'identité professionnelle: le sujet en formation se construit comme acteur social en même temps des savoirs propices à son agir. Plus précisément, notre préoccupation de recherche concerne les indicateurs de cette co-construction soi/savoirs professionnels tels qu'on peut les inférer à partir de l'analyse de discours écrits ou oraux produits par les étudiants. [less ▲]

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See detailNGC6231: X-ray Properties of the Early-Type Star Population
Sana, H.; Nazé, Yaël ULg; Gosset, Eric ULg et al

in Massive Stars in Interactive Binaries (2007)

Based on a deep XMM-Newton observation of the young open cluster NGC6231, we derive the main X-ray properties of its early-type star population. Among the 610 X-ray sources detected in the field, 42 are ... [more ▼]

Based on a deep XMM-Newton observation of the young open cluster NGC6231, we derive the main X-ray properties of its early-type star population. Among the 610 X-ray sources detected in the field, 42 are associated with early-type stars. We investigate their L[SUB]X[/SUB]/L[SUB]bol[/SUB] relationship and confirm the clear dichotomy between O- and B-type stars. The cut-off line between the two behaviours occurs at L[SUB]bol[/SUB] ~ 10[SUP]38[/SUP] erg s[SUP]-1[/SUP] as previously proposed by Berghöfer et al. (1997). The distinction between single and binary stars is not clear cut, except for the colliding wind system HD152248. The X-ray detected B-stars in NGC6231 appear to be more luminous than predicted from the Berghöfer et al. relation. Though this suggests a bimodal distribution of the B-star X-ray emission, we caution however that these results might be biased by detection limits. Finally we investigate the X-ray variability of the detected sources and we find that about 40% of the X-ray emitters in the field of view present consistent signs of variability in the EPIC instruments. This fraction is much larger than previously thought. About one third of the early-type star population, either singles or binaries, further show variability. These variations do not seem to be exclusively related to binarity and could thus not be systematically interpreted in the framework of a wind-wind collision phenomenon. [less ▲]

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See detailArticle 37 Brussels I Regulation - a Commentary
Wautelet, Patrick ULg

in Mankowski, Peter (Ed.) Brussels I Regulation - a Commentary (2007)

] This is a commentary of one provision to be found in the Brussels I Regulation, i.e. Article 37. The purpose of the commentary is to provide a clear and concise statement of the law, including the case ... [more ▼]

] This is a commentary of one provision to be found in the Brussels I Regulation, i.e. Article 37. The purpose of the commentary is to provide a clear and concise statement of the law, including the case law of the European Court of Justice and of the most important courts of the Member States, in relation to this provision. This version has been published in the first edition of the commentary. A second edition is now available (www.sellier.de). [less ▲]

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See detailDipole-induced vortex ratchets in superconducting films with arrays of micromagnets
de Souza Silva, C. C.; Silhanek, Alejandro ULg; Van de Vondel, J. et al

in Physical Review Letters (2007), 98(11),

We investigate the transport properties of superconducting films with periodic arrays of in-plane magnetized micromagnets. Two different magnetic textures are studied: a square array of magnetic bars and ... [more ▼]

We investigate the transport properties of superconducting films with periodic arrays of in-plane magnetized micromagnets. Two different magnetic textures are studied: a square array of magnetic bars and a close-packed array of triangular microrings. As confirmed by magnetic force microscopy imaging, the magnetic state of both systems can be adjusted to produce arrays of almost pointlike magnetic dipoles. By carrying out transport measurements with ac drive, we observed experimentally a recently predicted ratchet effect induced by the interaction between superconducting vortices and the magnetic dipoles. Moreover, we find that these magnetic textures produce vortex-antivortex patterns, which have a crucial role in the transport properties of this hybrid system. [less ▲]

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See detailThe Pregnancy-Associated Glycoproteins: Biochemical Aspects and Clinical Application for Pregnancy Follow-up
Melo de Sousa, Noelita ULg; Barbato, O.; Bella, Amina ULg et al

Conference (2007)

Pregnancy diagnosis is an important part in reproduction management of ruminants. In the last years, a large polymorphic family of placenta-expressed proteins has been discovered in ruminant species and ... [more ▼]

Pregnancy diagnosis is an important part in reproduction management of ruminants. In the last years, a large polymorphic family of placenta-expressed proteins has been discovered in ruminant species and used for pregnancy diagnosis. Members of this family are named pregnancy-associated glycoproteins (PAG), being synthesized in the mono- and binucleate cells of the ruminant’s trophectoderm. Part of them are released in the maternal blood circulation where they can be assayed by different laboratory techniques. Due to large variety of expressed molecules and to large variations in the post-translational processing of the PAG, different immuno-systems present different ability to quantify the PAG released in blood. The sensitivity (92 to 100%) and specificity of PAG radioimmunoassay when used for pregnancy diagnosis are very high. The assay of PAG can also bring very interesting information for researchers working in programs focused on the study of embryonic and fetal mortalities, as well as on embryo biotechnology (ET, FIV, clonage), animal nutrition, or infections diseases resulting in pathologies affecting the pregnancy. [less ▲]

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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 ▲]

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See detailFungal thigmotropism in onychomycosis and in a clear hydrogel pad model.
Pierard, Gérald ULg; Pierard, Claudine ULg; Quatresooz, Pascale ULg

in Dermatology : International Journal for Clinical & Investigative Dermatology (2007), 215(2), 107-13

BACKGROUND: Thigmotropism is a biological characteristic corresponding to the directional growth of cells following topographical guidance cues. This behavior has been shown experimentally with fungal ... [more ▼]

BACKGROUND: Thigmotropism is a biological characteristic corresponding to the directional growth of cells following topographical guidance cues. This behavior has been shown experimentally with fungal hyphae of both dermatophytes and nondermatophyte molds, as well as with the mycelial phase of the dimorphic yeast Candida albicans. OBJECTIVE AND METHODS: We presently document this phenomenon using histomycology in onychomycoses of various fungal origins. RESULTS: This mechanism is involved in the invasive phase of the pathogen or opportunistic fungi, and it probably governs various clinical aspects of onychomycoses. We incidentally disclosed fungal invasions of hydrogel pads. Conclusion: Thigmotropism can in part explain the diversity of orientations and shapes of fungi invading nail plates. The same phenomenon was disclosed inside hydrogel pads. As this material is transparent and easy to cut for microscopic examination, fungal thigmotropism is conveniently explored by this way. [less ▲]

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See detailEchec du référendum
Durand, Pascal ULg

in Durand, Pascal (Ed.) Les Nouveaux Mots du Pouvoir. Abécédaire critique (2007)

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