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See detailUse of Interbull traits as indicators for only locally evaluated traits as milk quality traits
Gengler, Nicolas ULg; Vanderick, Sylvie ULg; Croquet, Coraline et al

in Interbull Bulletin (2006), 35

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See detailNo accelerated rate of protein evolution in male-biased Drosophila pseudoobscura genes.
Metta, Muralidhar ULg; Gudavalli, Rambabu; Gibert, Jean-Michel et al

in Genetics (2006), 174(1), 411-20

Sexually dimorphic traits are often subject to diversifying selection. Genes with a male-biased gene expression also are probably affected by sexual selection and have a high rate of protein evolution. We ... [more ▼]

Sexually dimorphic traits are often subject to diversifying selection. Genes with a male-biased gene expression also are probably affected by sexual selection and have a high rate of protein evolution. We used SAGE to measure sex-biased gene expression in Drosophila pseudoobscura. Consistent with previous results from D. melanogaster, a larger number of genes were male biased (402 genes) than female biased (138 genes). About 34% of the genes changed the sex-related expression pattern between D. melanogaster and D. pseudoobscura. Combining gene expression with protein divergence between both species, we observed a striking difference in the rate of evolution for genes with a male-biased gene expression in one species only. Contrary to expectations, D. pseudoobscura genes in this category showed no accelerated rate of protein evolution, while D. melanogaster genes did. If sexual selection is driving molecular evolution of male-biased genes, our data imply a radically different selection regime in D. pseudoobscura. [less ▲]

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See detailEvidence for association between the HLA-DQA locus and abdominal aortic aneurysms in the Belgian population: a case control study.
Ogata, Toru; Gregoire, Lucie; Goddard, Katrina A B et al

in BMC Medical Genetics (2006), 7

BACKGROUND: Chronic inflammation and autoimmunity likely contribute to the pathogenesis of abdominal aortic aneurysms (AAAs). The aim of this study was to investigate the role of autoimmunity in the ... [more ▼]

BACKGROUND: Chronic inflammation and autoimmunity likely contribute to the pathogenesis of abdominal aortic aneurysms (AAAs). The aim of this study was to investigate the role of autoimmunity in the etiology of AAAs using a genetic association study approach with HLA polymorphisms. METHODS: HLA-DQA1, -DQB1, -DRB1 and -DRB3-5 alleles were determined in 387 AAA cases (180 Belgian and 207 Canadian) and 426 controls (269 Belgian and 157 Canadian) by a PCR and single-strand oligonucleotide probe hybridization assay. RESULTS: We observed a potential association with the HLA-DQA1 locus among Belgian males (empirical p = 0.027, asymptotic p = 0.071). Specifically, there was a significant difference in the HLA-DQA1*0102 allele frequencies between AAA cases (67/322 alleles, 20.8%) and controls (44/356 alleles, 12.4%) in Belgian males (empirical p = 0.019, asymptotic p = 0.003). In haplotype analyses, marginally significant association was found between AAA and haplotype HLA-DQA1-DRB1 (p = 0.049 with global score statistics and p = 0.002 with haplotype-specific score statistics). CONCLUSION: This study showed potential evidence that the HLA-DQA1 locus harbors a genetic risk factor for AAAs suggesting that autoimmunity plays a role in the pathogenesis of AAAs. [less ▲]

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See detailUse of a High-Temperature Superconducting Coil for Magnetic Energy Storage
Fagnard, Jean-François ULg; Crate, David; Jamoye, Jean-François et al

in Institute of Physics Conference Series (2006), 43

A high temperature superconducting magnetic energy storage device (SMES) has been realised using a 350 m-long BSCCO tape wound as a ''pancake'' coil. The coil is mounted on a cryocooler allowing ... [more ▼]

A high temperature superconducting magnetic energy storage device (SMES) has been realised using a 350 m-long BSCCO tape wound as a ''pancake'' coil. The coil is mounted on a cryocooler allowing temperatures down to 17.2 K to be achieved. The temperature dependence of coil electrical resistance R(T) shows a superconducting transition at T = 102.5 K. Measurements of the V(I) characteristics were performed at several temperatures between 17.2 K and 101.5 K to obtain the temperature dependence of the critical current (using a 1 uV/cm criterion). Critical currents were found to exceed 100 A for T < 30 K. An electronic DC-DC converter was built in order to control the energy flow in and out of the superconducting coil. The converter consists of a MOS transistor bridge switching at a 80 kHz frequency and controlled with standard Pulse Width Modulation (PWM) techniques. The system was tested using a 30 V squared wave power supply as bridge input voltage. The coil current, the bridge input and output voltages were recorded simultaneously. Using a 10 A setpoint current in the superconducting coil, the whole system (coil + DC-DC converter) can provide a stable output voltage showing uninterruptible power supply (UPS) capabilities over 1 s. [less ▲]

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See detailSound production mechanism in carapid fish: first example with a slow muscle
Parmentier, Eric ULg; Lagardère, Jean-Paul; Vandewalle, Pierre ULg et al

Conference (2006)

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See detailEffects of lipopeptidesonmodel membranes
Deleu, Magali ULg

in 6th annual surface and colloid symposium: lipid-peptide interactions and biological function (2006)

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See detailParticipation citoyenne et sécurité publique : enjeux émergents et expériences locales
Seron, Vincent ULg; Smeets, Sybille

Book published by Politeia (2006)

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See detailPrediction of deformation textures in zirconium based on a simplified modelling of grain interaction
Lelotte, Thomas; Delannay, L.; Habraken, Anne ULg

in Khan, A. S. (Ed.) Proceedings of the Plasticity Conference 2006 (2006)

The goal of this study is to apply a “multisite” crystal plasticity model to the prediction of texture evolution in zirconium deformed at high temperature. The model under consideration is an extension of ... [more ▼]

The goal of this study is to apply a “multisite” crystal plasticity model to the prediction of texture evolution in zirconium deformed at high temperature. The model under consideration is an extension of the elastic-viscoplastic “multisite model” proposed by Delannay et al. [2005] which has been adapted to account for a new type of grain interaction (Van Houtte et al. [2005]). Predictions of the model are compared to experimental data. Two forming processes are considered: sheet rolling (Lebensohn et al. [1994]) and the torsion of a cylindrical bar (Sanchez et al. [2001]). [less ▲]

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See detailLa hiérarchie sémiotique
Badir, Sémir ULg

in Hébert, Louis (Ed.) Signo (2006)

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See detailN1,N2,N3-trisisopentenyl guanidine and N1,N2-diisopentenyl guanidine, two cytotoxic alkaloids from Alchornea cordifolia (Schumach.& Thonn.) Mull. Arg. (Euphorbiaceae) root barks.
Mavar-Manga, H.; Chapon, David; Hoet, Sara et al

in Natural Product Communications [=NPC] (2006), 1(12), 1097-1100

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See detailMathematical model of the acute inflammatory response to Escherichia coli in intramammary challenge
Detilleux, Johann ULg; Vangroenweghe, F.; Burvenich, C.

in Journal of Dairy Science (2006), 89(9), 3455-3465

We constructed a mathematical model of the early response to Escherichia coli infection of the mammary gland and explored the roles and interactions between inflammatory cells and bacteria. The model ... [more ▼]

We constructed a mathematical model of the early response to Escherichia coli infection of the mammary gland and explored the roles and interactions between inflammatory cells and bacteria. The model incorporates 3 equations that describe the interactions among bacteria, milk somatic cells, and blood leukocyte densities. These 3 equations were fitted to cell densities observed during acute inflammatory responses in unvaccinated and vaccinated heifers inoculated with 10(4) or 10(6) cfu of E. coli. The rates computed for the cellular transit from the storage sites to the blood and from the blood to the milk were lower in cows receiving 10(4) cfu but increased at approximately 6 x 10(-6) and 30 x 10(-6) microL/cfu per h in nonvaccinated or vaccinated cows inoculated with 10(6) cfu, respectively. The cellular rates of bacterial killing were highest in unvaccinated cows ( approximately 400 x 10(-6) microL/cell per h) when compared with vaccinated cows (200 to 300 x 10(-6) microL/cell per h). A critical density of milk somatic cells at which bacteria density is constant was computed from the model at 2 x 10(6) cells/mL, and a one-way sensitivity analysis revealed that the changes in milk cellular densities were mostly sensitive to variations in the rate of bacterial killing and in the rate of production of inflammatory cells. [less ▲]

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See detailInvestigation on the Delay Time of Coal Experiment by Laser-induced Breakdown Spectroscopy
Li, Jie ULg; Lu, Jidong; Xie, Chengli et al

Conference (2006)

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See detailBacteriological identification and antibiotic sensitivity testing
Mainil, Jacques ULg; Menozzi, M.; Pelkonen, S. et al

in Mainil, Jacques (Ed.) Genus Clostridium - Clostridia in medical, veterinary and food microbiology : Diagnosis and typing (2006)

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See detailBone-derived mediators and cartilage degradation
Henrotin, Yves ULg

in Annals of the Rheumatic Diseases (2006), 65(Suppl II), 10

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See detailL'accès-libre : une reconfiguration efficace du métier de l'élève et de l'enseignant ? Observation et analyse des conditions d'efficacité.
Monville, Bertrand; Devreux, Véronique; Dahmen, Manfred et al

in Actes du 4e Congrès des Chercheurs en Education : La qualité pour tous les élèves : l'école face aux inégalités. (2006)

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See detailEpidémiologie du mélanome et nouvautés diagnostiques
QUATRESOOZ, Pascale ULg; PIERARD, Gérald ULg

Scientific conference (2006)

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See detailAnalysis of speckle patterns for deformation measurements by DIC
Lecompte, David; Sol, H.; Vantomme, J. et al

in Slangen, Pierre; Cerruti, Christine (Eds.) Proceedings of SPIE Vol. 6341 (2006)

Digital Image Correlation (DIC) – also referred to as white light speckle technique – is an optical-numerical full-field measuring technique, which offers the possibility to determine in-plane ... [more ▼]

Digital Image Correlation (DIC) – also referred to as white light speckle technique – is an optical-numerical full-field measuring technique, which offers the possibility to determine in-plane displacement fields at the surface of objects under any kind of loading. For an optimal use of the method, the object of interest has to be covered with a speckle pattern. The present paper studies the efficiency of a random speckle pattern and its influence on the measured in-plane displacements with respect to the subset size. First a randomly sprayed speckle pattern is photographed three times. Each picture is taken with a different zoom, yielding three speckle patterns, which are different by the size of the speckles. Secondly a number of speckle patterns are generated numerically using a given speckle size and image coverage. Subsequently, each speckle pattern image undergoes a numerically controlled deformation, which is measured with digital image correlation software. Both imposed and measured displacements are compared and it is shown that the size of the speckles combined with the size of the used pixel subset, clearly influences the accuracy of the measured displacements. Furthermore it is shown that it is possible to create an optimal speckle pattern when a given subset size is chosen. [less ▲]

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See detailBack to work
Stassart, Pierre M ULg; Mormont, Marc ULg; Louviaux, Mélanie

Conference (2006)

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