References of "2007"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailField induced metastabilities in U(Ru0.96Rh0.04)(2)Si-2
Silhanek, Alejandro ULg; Jaime, M.; Harrison, N. et al

in Physica C: Superconductivity (2007), 460(Part 1), 682-683

U(Ru0.96Rh0.04)(2)Si-2 is an anisotropic itinerant 5f heavy electron system which exhibits a single field induced magnetic phase concealing a quantum critical point. We show that the boundary of this ... [more ▼]

U(Ru0.96Rh0.04)(2)Si-2 is an anisotropic itinerant 5f heavy electron system which exhibits a single field induced magnetic phase concealing a quantum critical point. We show that the boundary of this phase corresponds to a first order transition as revealed by (1) a large and symmetric specific heat anomaly, (2) an asymmetric magnetocaloric effect on entering and exiting this phase, and (3) a clear history and time-dependent specific heat. We explore the thermodynamic similarities with the mixed valence compound YbInCu4 and show that the out-of-equilibrium properties are analogous to those depicted by the critical state model for hard superconductors. (C) 2007 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 17 (9 ULg)
Full Text
Peer Reviewed
See detailImpact of microbial activities on the mineralogy and performance of column-scale permeable reactive iron barriers operated under two different redox conditions
Van Nooten, Thomas; Lieben, François; Dries, Jan et al

in Environmental Science & Technology (2007), 41(16), 5724-5730

The present study focuses on the impact of microbial activities on the performance of various long-term operated laboratory-scale permeable reactive barriers. The barriers contained both aquifer and Fe-0 ... [more ▼]

The present study focuses on the impact of microbial activities on the performance of various long-term operated laboratory-scale permeable reactive barriers. The barriers contained both aquifer and Fe-0 compartments and had received either sulfate or iron(Ill)-EDTAto promote sulfatereducing and iron(Ill)-reducing bacteria, respectively. After dismantlement of the compartments after almost 3 years of operation, DNA-based PCR-DGGE analysis revealed the presence of methanogenic, sulfate-reducing, metalreducing, and denitrifying bacteria within as well as up- and downgradient of the Fe-0 matrix. Under all imposed conditions, the main secondary phases were vivianite, siderite, ferrous hydroxy carbonate, and carbonate green rust as found by scanning electron microscopy (SEM) combined with energy dispersive X-ray analysis (EDX), and X-ray diffraction (XRD). Under sulfate-reduction promoting conditions, iron sulfides were formed in addition, resulting in 7 and 10 times higher degradation rates for PCE and TICE, respectively, compared to unreacted iron. These results indicate that the presence of sulfate-reducing bacteria in or around iron barriers and the subsequent formation of iron sulfides might increase the barrier reactivity. [less ▲]

Detailed reference viewed: 57 (2 ULg)
See detailJacques Bourton
Tomasovic, Dick ULg

in Aubenas, Jacqueline (Ed.) Filmer la danse (2007)

Detailed reference viewed: 23 (0 ULg)
Full Text
See detailLa gestión del medio ambiente: aporte teóricos y metodológicos de la sociología en el caso del desarrollo ecoturístico de la Vía Parque Isla de Salamanca
Escobar Jimenez, Kelly ULg

Master's dissertation (2007)

Este trabajo estudia los procesos de gestión ambiental relacionados con el desarrollo ecoturístico de la VIPIS. Para esto se analizan las interacciones de los actores de la VIPIS y sus formas de ... [more ▼]

Este trabajo estudia los procesos de gestión ambiental relacionados con el desarrollo ecoturístico de la VIPIS. Para esto se analizan las interacciones de los actores de la VIPIS y sus formas de apropiación y utilización del medio ambiente; se exploran las posibilidades del desarrollo ecoturístico negociado en la VIPIS; y analizando el trasfondo del concepto de comunidad, y reflexionando sobre los tipos de participación para el caso del Parque Natural, se propone y explora la “Gestión ambiental Comunitaria”. A lo largo del texto se presentan los aportes metodológicos y teóricos de la sociología en el campo de la gestión ambiental. [less ▲]

Detailed reference viewed: 233 (9 ULg)
See detailStratégie pour l’analyse qualitative et quantitative de sirops de céréales enrichis par voie enzymatique en isomaltooligosaccharides
Goffin, Dorothée ULg

Master of advanced studies dissertation (2007)

Les Isomaltooligosaccharides (IMO) sont constitués de monomères de glucose liés par au moins une liaison α-1-6 (IMO classique), ou dans une moindre proportion α -1-3 (famille nigero-) ou α -1-2 (famille ... [more ▼]

Les Isomaltooligosaccharides (IMO) sont constitués de monomères de glucose liés par au moins une liaison α-1-6 (IMO classique), ou dans une moindre proportion α -1-3 (famille nigero-) ou α -1-2 (famille koji-). Ils sont produits par voie enzymatique à partir d’amidon de céréales hydrolysé. Un mélange très complexe est obtenu avec des molécules caractérisées à la fois par leur valeur de DP (de 2 à ~15), le type de liaisons en présence ainsi que la proportion et la position de chaque type de liaison (seules α -1-6 ou en combinaison). Le défi de cette étude est de trouver une méthode qualitative et quantitative pour caractériser ces sirops. Trois différentes méthodes ont été testées à l’aide de trois différents types de détecteur et comparées selon des critères de sélectivité, sensibilité, robustesse, applicabilité et de la faisabilité de l’analyse quantitative L’HPLC-RID (Refractive Index Detector) utilisée avec une colonne Prevail Carbohydrate (Alltech), adaptée aux sucres de DP variables, s’est révélée être peu sélective du fait de l’obligation de travailler en conditions isocratiques. L’HPLC-ELSD (Evaporating Light Scattering Detector) permettant de travailler en gradient d’élution, une très bonne séparation des différents DP est obtenue sur la même colonne ainsi qu’une séparation des différents DP2 et une amélioration de la sensibilité. L’analyse quantitative reste plus délicate du fait de la zone relativement limitée de linéarité. La Chromatographie à Echange d’Anion et à Haute performance couplée à la Détection à Amperometrie Pulsée (HPAEC-PAD), une séparation hautement sélective et une détection très sensible. Elle est une des seules méthode capable de séparer des molécules homologues ayant comme seules différences leur DP ou de leur type et la séquence de leurs liaisons. L’analyse quantitative a fait l’objet d’une étude approfondie, les facteur de réponses étant dépendant de la structure, du DP et du type de liaisons des oligosaccharides. [less ▲]

Detailed reference viewed: 159 (7 ULg)
Full Text
Peer Reviewed
See detailRandom subwindows and extremely randomized trees for image classification in cell biology
Marée, Raphaël ULg; Geurts, Pierre ULg; Wehenkel, Louis ULg

in BMC Cell Biology (2007), 8(Suppl. 1),

Background: With the improvements in biosensors and high-throughput image acquisition technologies, life science laboratories are able to perform an increasing number of experiments that involve the ... [more ▼]

Background: With the improvements in biosensors and high-throughput image acquisition technologies, life science laboratories are able to perform an increasing number of experiments that involve the generation of a large amount of images at different imaging modalities/scales. It stresses the need for computer vision methods that automate image classification tasks. Results: We illustrate the potential of our image classification method in cell biology by evaluating it on four datasets of images related to protein distributions or subcellular localizations, and red-blood cell shapes. Accuracy results are quite good without any specific pre-processing neither domain knowledge incorporation. The method is implemented in Java and available upon request for evaluation and research purpose. Conclusion: Our method is directly applicable to any image classification problems. We foresee the use of this automatic approach as a baseline method and first try on various biological image classification problems. [less ▲]

Detailed reference viewed: 148 (24 ULg)
See detailAntonin de Bemels. Le danseur, le pantin et la métamorphose
Tomasovic, Dick ULg

in Aubenas, Jacqueline (Ed.) Filmer la danse (2007)

Detailed reference viewed: 15 (0 ULg)
Full Text
See detailA dataset for hadron elastic scattering
Cudell, Jean-René ULg; Lenguel, Sasha; Martynov, E.

Textual, factual or bibliographical database (2007)

Detailed reference viewed: 34 (3 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 26 (4 ULg)
Full Text
Peer Reviewed
See detailList of Regional and Interregional Arrangements
Santander, Sébastian ULg

in Telò, Mario (Ed.) European Union and New Regionalism. Regional actors and global governance in a post-hegemonic era (2007)

The article analyse the regional and international organizations at the global scene.

Detailed reference viewed: 24 (7 ULg)
Full Text
Peer Reviewed
See detailEricksonian hypnosis in tinnitus therapy.
Maudoux, Audrey ULg; Bonnet, Sophie ULg; Lhonneux-Ledoux, F. et al

in B-ENT (2007), 3 Suppl 7

OBJECTIVE: To evaluate the effect of Ericksonian therapy on tinnitus STUDY DESIGN: Non-randomised, prospective longitudinal study. SETTING: Tertiary referral centre. PATIENTS: A total of 49 patients ... [more ▼]

OBJECTIVE: To evaluate the effect of Ericksonian therapy on tinnitus STUDY DESIGN: Non-randomised, prospective longitudinal study. SETTING: Tertiary referral centre. PATIENTS: A total of 49 patients underwent hypnosis therapy. Fourteen patients failed to finish the therapy (drop-out rate: 35%). Of the 35 patients who completed the therapy, 20 were male and 15 female. The average age was 46.3 years (range 17-78). INTERVENTION: The treatment is based on the principles and approaches of Ericksonian hypnosis. The first session was mainly dedicated to the evaluation of the impact of tinnitus on the patient's life and to an explanation of hypnosis therapy. The next sessions were "learning sessions" based on relaxation and mental imaging. Exercises were first based on all senses other than hearing. Then they focused on hearing, teaching patients how to modulate sound intensity, and finally how to modulate tinnitus intensity. Patients also learnt self-hypnosis. MAIN OUTCOME MEASURE(S): To evaluate the effect of the treatment, tinnitus was assessed with the Tinnitus Handicap Inventory questionnaire before and after the therapy. Results: After 5 to 10 sessions (mean: 8.09 + -1.92) of Ericksonian hypnosis therapy, the 35 patients were capable of self-hypnosis with the aim of modulating their tinnitus, and the measured THI score fell for all patients. The global score improved significantly from 60:23 before EH therapy to 16.9 at discharge. Within the group, the initial score was distributed as follows: 0% slight, 14% mild, 31% moderate, 31% severe and 23% catastrophic. The t-test for dependent variables revealed significant improvements in all subgroups (p < or = 0.005). CONCLUSIONS: The results of this clinical trial demonstrate that Ericksonian hypnosis, in particular using self-hypnosis, is a promising technique for treating patients with tinnitus. [less ▲]

Detailed reference viewed: 48 (3 ULg)
Full Text
Peer Reviewed
See detailNovel Crohn disease locus identified by genome-wide association maps to a gene desert on 5p13.1 and modulates expression of PTGER4.
Libioulle, Cécile ULg; Louis, Edouard ULg; Hansoul, Sarah ULg et al

in PLoS Genetics (2007), 3(4), 538-543

To identify novel susceptibility loci for Crohn disease (CD), we undertook a genome-wide association study with more than 300,000 SNPs characterized in 547 patients and 928 controls. We found three ... [more ▼]

To identify novel susceptibility loci for Crohn disease (CD), we undertook a genome-wide association study with more than 300,000 SNPs characterized in 547 patients and 928 controls. We found three chromosome regions that provided evidence of disease association with p-values between 10(-6) and 10(-9). Two of these (IL23R on Chromosome 1 and CARD15 on Chromosome 16) correspond to genes previously reported to be associated with CD. In addition, a 250-kb region of Chromosome 5p13.1 was found to contain multiple markers with strongly suggestive evidence of disease association (including four markers with p < 10(-7)). We replicated the results for 5p13.1 by studying 1,266 additional CD patients, 559 additional controls, and 428 trios. Significant evidence of association (p < 4 x 10(-4)) was found in case/control comparisons with the replication data, while associated alleles were over-transmitted to affected offspring (p < 0.05), thus confirming that the 5p13.1 locus contributes to CD susceptibility. The CD-associated 250-kb region was saturated with 111 SNP markers. Haplotype analysis supports a complex locus architecture with multiple variants contributing to disease susceptibility. The novel 5p13.1 CD locus is contained within a 1.25-Mb gene desert. We present evidence that disease-associated alleles correlate with quantitative expression levels of the prostaglandin receptor EP4, PTGER4, the gene that resides closest to the associated region. Our results identify a major new susceptibility locus for CD, and suggest that genetic variants associated with disease risk at this locus could modulate cis-acting regulatory elements of PTGER4. [less ▲]

Detailed reference viewed: 100 (9 ULg)
Full Text
Peer Reviewed
See detailLong-term outcomes in dogs with sinonasal aspergillosis treated with intranasal infusions of enilconazole
Schuller, S.; Clercx, Cécile ULg

in Journal of the American Animal Hospital Association (2007), 43(1, Jan-Feb), 33-38

Long-term outcomes ( mean 38 +/- 17 months) were evaluated in 27 dogs with sinonasal aspergillosis after successful medical treatment using intranasal infusions of 1% or 2% enilconazole ( 1%, n= 15; 2%, n ... [more ▼]

Long-term outcomes ( mean 38 +/- 17 months) were evaluated in 27 dogs with sinonasal aspergillosis after successful medical treatment using intranasal infusions of 1% or 2% enilconazole ( 1%, n= 15; 2%, n= 12). Long-term outcomes with both treatment protocols were good, with half of the dogs being asymptomatic throughout the follow-up period. The remaining dogs showed mild clinical signs compatible with chronic rhinitis/sinusitis. These clinical signs were interpreted as chronic lymphoplasmacytic rhinitis/sinusitis and episodes of bacterial rather than fungal infection. Three dogs had confirmed reinfection or relapse 2 to 36 months after clinical resolution. [less ▲]

Detailed reference viewed: 10 (3 ULg)
Full Text
Peer Reviewed
See detailNonexponential decay of Bose-Einstein condensates: a numerical study based on the complex scaling method
Schlagheck, Peter ULg; Wimberger, S.

in Applied Physics B : Lasers & Optics (2007), 86(3), 385-390

We study the decay dynamics of an interacting Bose-Einstein condensate in the presence of a metastable trapping potential from which the condensate can escape via tunneling through finite barriers. The ... [more ▼]

We study the decay dynamics of an interacting Bose-Einstein condensate in the presence of a metastable trapping potential from which the condensate can escape via tunneling through finite barriers. The time-dependent decay process is reproduced by means of the instantaneous decay rates of the condensate at a given population of the quasi-bound state, which are calculated with the method of complex scaling. Both for the case of a double-barrier potential as well as for the case of a tilted periodic potential, we find pronounced deviations from a monoexponential decay behavior, which would generally be expected in the absence of the atom-atom interaction. [less ▲]

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailPolynomial regression with censored data based on preliminary nonparametric estimation
Heuchenne, Cédric ULg; Van Keilegom, Ingrid

in Annals of the Institute of Statistical Mathematics (2007), 59(2), 273-297

Consider the polynomial regression model Y = (beta)0 + beta(1) X + center dot center dot center dot beta X-p(p) + sigma (X)epsilon, where sigma(2)(X) = Var(Y vertical bar X) is unknown, and epsilon is ... [more ▼]

Consider the polynomial regression model Y = (beta)0 + beta(1) X + center dot center dot center dot beta X-p(p) + sigma (X)epsilon, where sigma(2)(X) = Var(Y vertical bar X) is unknown, and epsilon is independent of X and has zero mean. Suppose that Y is subject to random right censoring. A new estimation procedure for the parameters beta(0), center dot center dot center dot, beta (p) is proposed, which extends the classical least squares procedure to censored data. The proposed method is inspired by the method of Buckley and James (1979, Biometrika, 66, 429-436), but is, unlike the latter method, a noniterative procedure due to nonparametric preliminary estimation of the conditional regression function. The asymptotic normality of the estimators is established. Simulations are carried out for both methods and they show that the proposed estimators have usually smaller variance and smaller mean squared error than Buckley-James estimators. The two estimation procedures are also applied to a medical and a astronomical data set. [less ▲]

Detailed reference viewed: 53 (15 ULg)
Full Text
Peer Reviewed
See detailCamelpox virus encodes a schlafen-like protein that affects orthopoxvirus virulence.
Gubser, Caroline; Goodbody, Rory; Ecker, Andrea et al

in Journal of General Virology (The) (2007), 88(Pt 6), 1667-76

Camelpox virus (CMLV) gene 176R encodes a protein with sequence similarity to murine schlafen (m-slfn) proteins. In vivo, short and long members of the m-slfn family inhibited T-cell development, whereas ... [more ▼]

Camelpox virus (CMLV) gene 176R encodes a protein with sequence similarity to murine schlafen (m-slfn) proteins. In vivo, short and long members of the m-slfn family inhibited T-cell development, whereas in vitro, only short m-slfns caused arrest of fibroblast growth. CMLV 176 protein (v-slfn) is most closely related to short m-slfns; however, when expressed stably in mammalian cells, v-slfn did not inhibit cell growth. v-slfn is a predominantly cytoplasmic 57 kDa protein that is expressed throughout infection. Several other orthopoxviruses encode v-slfn proteins, but the v-slfn gene is fragmented in all sequenced variola virus and vaccinia virus (VACV) strains. Consistent with this, all 16 VACV strains tested do not express a v-slfn detected by polyclonal serum raised against the CMLV protein. In the absence of a small animal model to study CMLV pathogenesis, the contribution of CMLV v-slfn to orthopoxvirus virulence was studied via its expression in an attenuated strain of VACV. Recombinant viruses expressing wild-type v-slfn or v-slfn tagged at its C terminus with a haemagglutinin (HA) epitope were less virulent than control viruses. However, a virus expressing v-slfn tagged with the HA epitope at its N terminus had similar virulence to controls, implying that the N terminus has an important function. A greater recruitment of lymphocytes into infected lung tissue was observed in the presence of wild-type v-slfn but, interestingly, these cells were less activated. Thus, v-slfn is an orthopoxvirus virulence factor that affects the host immune response to infection. [less ▲]

Detailed reference viewed: 50 (3 ULg)
Full Text
Peer Reviewed
See detailIntrinsic pro-angiogenic status of cystic fibrosis airway epithelial cells
Verhaeghe, Catherine ULg; Tabruyn, Sébastien ULg; Oury, Cécile ULg et al

in Biochemical and Biophysical Research Communications (2007), 356(3), 745-749

Cystic fibrosis is a common genetic disorder characterized by a severe lung inflammation and fibrosis leading to the patient's death. Enhanced angiogenesis in cystic fibrosis (CF) tissue has been ... [more ▼]

Cystic fibrosis is a common genetic disorder characterized by a severe lung inflammation and fibrosis leading to the patient's death. Enhanced angiogenesis in cystic fibrosis (CF) tissue has been suggested, probably caused by the process of inflammation, as similarly described in asthma and chronic bronchitis. The present study demonstrates an intrinsic pro-angiogenic status of cystic fibrosis airway epithelial cells. Microarray experiments showed that CF airway epithelial cells expressed several angiogenic factors such as VEGF-A, VEGF-C, bFGF, and PLGF at higher levels than control cells. These data were confirmed by real-time quantitative PCR and, at the protein level, by ELISA. Conditioned media of these cystic fibrosis cells were able to induce proliferation, migration and sprouting of cultured primary endothelial cells. This report describes for the first time that cystic fibrosis epithelial cells have an intrinsic angiogenic activity. Since excess of angiogenesis is correlated with more severe pulmonary disease, our results could lead to the development of new therapeutic applications. (c) 2007 Elsevier Inc. All rights reserved. [less ▲]

Detailed reference viewed: 37 (9 ULg)
Peer Reviewed
See detailThe Aznalcóllar disaster: An in-depth PIXE study of the pirite mine spill of 1998
Calvo Del Castillo, Helena ULg; Ruvalcaba Sil, Jose Luis; Álvarez, M. A. et al

Poster (2007)

Detailed reference viewed: 9 (0 ULg)