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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 detailLost Memories
Havelange, Carl ULg; DELRUE Rony

Book published by Hapax (2007)

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See detailSendai virus, the mouse parainfluenza type 1: A longstanding pathogen that remains up-to-date
Faisca, Pedro; Desmecht, Daniel ULg

in Research in Veterinary Science (2007), 82(1), 115-125

Biologically speaking, Sendai virus (SeV), the murine parainfluenza virus type 1, is perceived as a common respiratory pathogen that is endemic in many rodent colonies throughout the world. Currently it ... [more ▼]

Biologically speaking, Sendai virus (SeV), the murine parainfluenza virus type 1, is perceived as a common respiratory pathogen that is endemic in many rodent colonies throughout the world. Currently it is believed that SeV is the leading cause of pneumonia in mice and together with the mouse hepatitis viruses, is the most prevalent and important of the naturally occurring infections of mice. The scientific community also considers SeV as the archetype organism of the Paramyxoviridae family because most of the basic biochemical, molecular and biologic properties of the whole family were derived from its own characteristics. Recently, scientific interest for this old pathogen has re-emerged, this time because of its potential value as a vector for gene transfer. This review aimed at drawing an exhaustive picture of this multifaceted pathogen. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

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See detailPirandello far from Nature?: A reading of I vecchi e i giovani Focusing on Landscape
de Seta, Ilaria ULg

in Pirandello Studies (2007), 27

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See detail“L’occulte au fond de tous”. Introduction au mystère dans les lettres
Durand, Pascal ULg

in Reggiani, Chr; Magné, B. (Eds.) Écrire l’énigme (2007)

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See detailTime-domain homogenization of windings in 2-D finite element models
Gyselinck, Johan; V Sabariego, Ruth ULg; Dular, Patrick ULg

in IEEE Transactions on Magnetics (2007), 43(4), 1297-1300

In this paper, the authors propose an original time-domain extension of the frequency-domain homogenization of multiturn windings in finite element (FE) models. For the winding type in hand (e.g., round ... [more ▼]

In this paper, the authors propose an original time-domain extension of the frequency-domain homogenization of multiturn windings in finite element (FE) models. For the winding type in hand (e.g., round conductor with hexagonal packing), an elementary FE model is used for determining dimensionless frequency and time-domain coefficients regarding skin and proximity effect. These coefficients are readily utilized for homogenizing the winding in the FE model of the complete device. The method is successfully applied to an axisymmetric 103-turn inductor. The results agree very well with those obtained by an accurate but very expensive FE model in which all turns are finely discretized. [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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See detailActivation de l'information morphologique au cours de la reconnaissance des mots chez les apprentis lecteurs et les dyslexiques
Casalis, Séverine; Quemart, Pauline ULg; Colé, Pascale

in Hathout; Montermini, Fabio (Eds.) Morphologie à Toulouse. Actes du colloque international de morphologie 4èmes Décembrettes (2007)

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See detailForming limit predictions for single-point incremental sheet metal forming
Van Bael, A.; Eyckens, P.; He, S. et al

in Cueto, Elías; Chinesta, Francisco (Eds.) Proceedings of the 10th International ESAFORM Conference on Material Forming (2007)

A characteristic of incremental sheet metal forming is that much higher deformations can be achieved than conventional forming limits. In this paper it is investigated to which extent the highly non ... [more ▼]

A characteristic of incremental sheet metal forming is that much higher deformations can be achieved than conventional forming limits. In this paper it is investigated to which extent the highly non-monotonic strain paths during such a process may be responsible for this high formability. A Marciniak-Kuczynski (MK) model is used to predict the onset of necking of a sheet subjected to the strain paths obtained by finite-element simulations. The predicted forming limits are considerably higher than for monotonic loading, but still lower than the experimental ones. This discrepancy is attributed to the strain gradient over the sheet thickness, which is not taken into account in the currently used MK model. [less ▲]

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See detailKarsts in sandstones and quatrzites of Minas Gerais, Brazil
Willems, Luc ULg; Rodet, J.; Pouclet, A. et al

Poster (2007)

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See detailFunctional, inflammatory and morphological characterisation of a cat model of allergic airway inflammation
Kirschvink, N.; Leemans, Jérôme ULg; Delvaux, François et al

in Veterinary Journal (2007), 174(3), 541-553

The aims of this study were to characterise a model of feline allergic airway inflammation and to test through a longitudinal investigation whether five repeated allergen exposures would lead to signs of ... [more ▼]

The aims of this study were to characterise a model of feline allergic airway inflammation and to test through a longitudinal investigation whether five repeated allergen exposures would lead to signs of airway remodelling that would be detectable in vivo. Eight healthy control cats and eight cats sensitised with Ascaris suum allergens were investigated. Barometric whole body plethysmography (BWBP) was used for the assessment of respiratory variables and airway responsiveness (AR). Bronchoalveolar lavage fluid (BALF) was sampled for cytology and determination of F-2-isoprostane concentration and matrix metalloproteinase type 9 (MMP-9) activity. Thoracic radiography and bronchoscopy scores were also established. Cats were investigated prior to sensitisation and after inhalation of placebo or allergen challenge 1. BWBP measurements revealed a significant increase of enhanced pause (Penh), an index of bronchoconstriction, and AR in sensitised cats in response to allergen challenge 1. A significant increase in BALF neutrophil and eosinophil %, F-2-isoprostane concentration and MMP-9 activity, and increased radiography and bronchoscopy scores were recorded. After a recovery period of 6 weeks, all variables except BALF MMP-9 returned to baseline values. Four further allergen challenges induced similar changes to those seen in challenge I and no signs of persistent changes suggestive of bronchial remodelling were detectable. The model provides an in vivo approach to functional, inflammatory and morphological changes occurring in response to single and repeated allergen exposure. [less ▲]

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See detailA new interpretation of the Io UV footprint morphology
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg et al

Conference (2007)

The electromagnetic interaction between Io and the jovian magnetic field leads to an auroral UV footprint consisting of single or multiple UV spots in both jovian hemi- spheres. According to current ... [more ▼]

The electromagnetic interaction between Io and the jovian magnetic field leads to an auroral UV footprint consisting of single or multiple UV spots in both jovian hemi- spheres. According to current theories, the perturbation induced by the motion of Io in the plasma torus propagates along the field lines in the form of Alfvén waves and finally causes electron precipitation in the jovian ionosphere. The occurrence and mul- tiplicity of the secondary spots appear to be related to the position of Io in the plasma torus and have been attributed to partial reflections of the Alfvén waves on the torus boundaries. Nevertheless, the discrepancies between the predicted inter-spot distances and the measurements were found difficult to explain. Additionally, some crucial con- figurations of Io in the torus had never been observed. Our recent HST/ACS observations of the footprint in so far unexplored Io-plasma torus configurations lead to the finding of a new feature in the footprint: a faint spot upstream of the main spot. The observations of this precursor emission, together with the inconsistencies related to the inter-spot distances, suggest a new interpretation of the footprint morphology. We propose that the precursor and the first secondary spot stem from the same mechanism and we interpret them as the counterparts of the main spot occurring in the opposite hemisphere. [less ▲]

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See detailLe tétras lyre dans les Hautes-Fagnes : quarante ans de suivis - dix ans d'actions.
Poncin, Pascal ULg; Keulen, Christine; Loneux, Michèle ULg et al

Conference (2007)

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See detailAnalysis of the support provided to student-athletes in Wallonia. The case of higher education
Cloes, Marc ULg; Lenzen, Benoit; Polis, Ariane

in Diniz, J. A.; Carreiro da Costa, F.; Onofre, M. (Eds.) Active lifestyles: The impact of education and sport. Proceedings of the AIESEP 2005 World Congress (2007)

In this paper, the first aspect to keep in mind deals with the student-athletes’status. Indeed, the European culture is rather different than the North America’s one. US students, for example, have many ... [more ▼]

In this paper, the first aspect to keep in mind deals with the student-athletes’status. Indeed, the European culture is rather different than the North America’s one. US students, for example, have many advantages to become top athletes. Those who are selected in school, college or university teams are well supported by their institution. The NCCA (National Collegiate Athletic Association) is trying to limit the participation of the freshmen to the university competitions in order to provide them a better teaching context. An overview of the situation of studentathletes in 12 European countries revealed that not all of them have developed a positive climate in favour of their student-athletes. [less ▲]

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See detailDevelopment of a radioimmunoassay for bovine chymosin B
Idrissa-Sidikou, Djibo; Remy, Benoit; Dufrasne, Isabelle ULg et al

in Tropicultura (2007), 25(3), 134-139

The present study was conducted to develop and validate a specific radioimmunoassay system for measurement of bovine chymosin B (bChyB) concentrations in plasma samples. Bovine ChyB was used for ... [more ▼]

The present study was conducted to develop and validate a specific radioimmunoassay system for measurement of bovine chymosin B (bChyB) concentrations in plasma samples. Bovine ChyB was used for immunization of rabbits and as standard and tracer. Chymosin B concentrations were measured in plasma samples from two groups of calves (Group 1: calves sampled from birth to 24 hours; Group 2: calves sampled from Day 1 to 21 after birth) and from one cow during the peri-partum period. Detection limit of the assay was 9.0 ng/mL. Recovery was higher than 89.3%. Repeatability and reproducibility ranged from 1.52% to 5.23% and from 1.52% to 12.57% respectively. No cross-reaction was found with pepsinogen A from bovine, porcine or human origins. In Group 1, bChyB concentrations increased from 47.3±45.1 ng/mL (5 min after birth) to 325.5±161.2 ng/mL (12 hours after birth), then it decreased till 293.0±161.5 ng/mL (24 hours after birth). In Group 2, concentrations decreased from Day 1 (455.3±191.1 ng/mL) to Day 21 (117.9±85.1 ng/mL). In adult cow, mean concentration was 136.0±32.3 ng/mL. In conclusion, bChyB is able to cross the stomach basal membrane and to reach the blood circulation at detectable levels in both young calves and adult cows. [less ▲]

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