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See detailInnovation dans l'efficacité de la gestion administrative du personnel
Lisein, Olivier ULg

Conference given outside the academic context (2004)

Ce workshop interroge la valeur ajoutée des innovations technologiques au niveau de l'efficacité de la gestion administrative du personnel. A partir de l'exemple concret d'une entreprise liégeoise, il est ... [more ▼]

Ce workshop interroge la valeur ajoutée des innovations technologiques au niveau de l'efficacité de la gestion administrative du personnel. A partir de l'exemple concret d'une entreprise liégeoise, il est montré comment le recours à des solutions informatiques dédiées permet d'offrir une nouvelle gamme de services aux salariés, de confier aux salariés eux-mêmes la gestion d'une série de tâches relatives à leur dossier administratif et d'ainsi permettre au service du personnel d'avoir plus de temps pour mener à bien des initiatives de gestion des ressources humaines plutôt que d'administration du personnel. L'atelier a aussi pour but de questionner les meilleurs moyens de recourir à de telles solutions technologiques, notamment en fonction des publics cibles et des utilisateurs concernés par ce type d'innovations: cadres, employés, ouvriers, département RH, etc. [less ▲]

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See detailLa sexualité du couple vieillissant : quelle distribution des rôles ?
Kempeneers, Philippe ULg

in Patient Care, Neuropsychiatrie (2004), 4

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See detailNew integrative method to generate Bacillus subtilis recombinant strains free of selection markers
Brans, Alain ULg; Filée, Patrice ULg; Chevigné, Andy ULg et al

in Applied and Environmental Microbiology (2004), 70(12), 7241-7250

The novel method described in this paper combines the use of blaI, which encodes a repressor involved in Bacillus licheniformis BlaP beta-lactamase regulation, an antibiotic resistance gene, and a B ... [more ▼]

The novel method described in this paper combines the use of blaI, which encodes a repressor involved in Bacillus licheniformis BlaP beta-lactamase regulation, an antibiotic resistance gene, and a B. subtilis strain (BS1541) that is conditionally auxotrophic for lysine. We constructed a BlaI cassette containing blaI and the spectinomycin resistance genes and two short direct repeat DNA sequences, one at each extremity of the cassette. The BS1541 strain was obtained by replacing the B. subtilis P(lysA) promoter with that of the P(blaP) beta-lactamase promoter. In the resulting strain, the cloning of the blaI repressor gene confers lysine auxotrophy to BS1541. After integration of the BlaI cassette into the chromosome of a conditionally lys-auxotrophic (BS1541) strain by homologous recombination and positive selection for spectinomycin resistance, the eviction of the BlaI cassette was achieved by single crossover between the two short direct repeat sequences. This strategy was successfully used to inactivate a single gene and to introduce a gene of interest in the Bacillus chromosome. In both cases the resulting strains are free of selection marker. This allows the use of the BlaI cassette to repeatedly further modify the Bacillus chromosome. [less ▲]

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See detailLine profile variability in the spectra of Oef stars - II. HD192281, HD14442 and HD14434
De Becker, Michaël ULg; Rauw, Grégor ULg

in Astronomy and Astrophysics (2004), 427(3), 995-1008

We present the very first analysis of the spectroscopic variability of the three rapidly rotating Oef stars HD 192281 (O5(ef)), HD14442 (O5.5ef) and HD 14434 (O6.5( ef)). Radial velocities of the He II ... [more ▼]

We present the very first analysis of the spectroscopic variability of the three rapidly rotating Oef stars HD 192281 (O5(ef)), HD14442 (O5.5ef) and HD 14434 (O6.5( ef)). Radial velocities of the He II lambda 4541 line reveal no evidence of binarity on time scales of a few days, or from one year to the next, for any of the targets. The He II lambda 4686 double-peaked emission and, to some extent, the H absorption line display significant profile variability in the spectra of all three stars. Data gathered during different observing runs spread over six years reveal a rather stable time scale for HD 192281 and HD14442, whereas the variability pattern changes significantly from one year to the other. The case of HD 14434 is less clear as no obvious time scale emerges from our analysis. In a tentative way to interpret this variability, stellar rotation remains a possible clock for HD 192281 and HD14442. However, currently available models addressing stellar rotation fail to explain some crucial aspects of the observed variability behaviour, which appear to be even more complex in the case of HD 14434. [less ▲]

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See detailEtude expérimentale des performances thermo-hydrauliques de radiateurs
Cuevas, Cristian; Trebilcock, Felipe; Ngendakumana, Philippe ULg

Report (2004)

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See detailHard X-ray emission clumps in the gamma-Cygni supernova remnant: An INTEGRAL-ISGRI view
Bykov, A. M.; Krassilchtchikov, A. M.; Uvarov, Y. A. et al

in Astronomy and Astrophysics (2004), 427(3), 21-24

Spatially resolved images of the galactic supernova remnant G78.2+2.1 (gamma-Cygni) in hard X-ray energy bands from 25 keV to 120 keV are obtained with the IBIS-ISGRI imager aboard the International Gamma ... [more ▼]

Spatially resolved images of the galactic supernova remnant G78.2+2.1 (gamma-Cygni) in hard X-ray energy bands from 25 keV to 120 keV are obtained with the IBIS-ISGRI imager aboard the International Gamma-Ray Astrophysics Laboratory INTEGRAL. The images are dominated by localized clumps of about ten arcmin in size. The flux of the most prominent North-Western (NW) clump is (1.7+/-0.4)x10(-11) erg cm(-2) s(-1) in the 25-40 keV band. The observed X-ray fluxes are in agreement with extrapolations of soft X-ray imaging observations of gamma-Cyg by ASCA GIS and spatially unresolved RXTE PCA data. The positions of the hard X-ray clumps correlate with bright patches of optical line emission, possibly indicating the presence of radiative shock waves in a shocked cloud. The observed spatial structure and spectra are consistent with model predictions of hard X-ray emission from nonthermal electrons accelerated by a radiative shock in a supernova interacting with an interstellar cloud, but the powerful stellar wind of the O9V star HD 193322 is a plausible candidate for the NW source as well. [less ▲]

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See detailAn insulin-like growth factor 2-derived self-antigen inducing a regulatory cytokine profile after presentation to peripheral blood mononuclear cells from DQ8(+) type 1 diabetic adolescents - Preliminary design of a thymus-based tolerogenic self-vaccination
Geenen, Vincent ULg; Louis, Céline ULg; Martens, Henri ULg

in Annals of the New York Academy of Sciences (2004), 1037

This work aims to evaluate the potential use of insulin-like growth factor 2 (IGF-2) as the dominant thymic self-antigen precursor of the insulin family in designing a tolerogenic approach to type 1 ... [more ▼]

This work aims to evaluate the potential use of insulin-like growth factor 2 (IGF-2) as the dominant thymic self-antigen precursor of the insulin family in designing a tolerogenic approach to type 1 diabetes (T1D) prevention. This evaluation was primarily based on cytokine profile driven by MHC presentation of insulin and IGF-2-derived antigens to PBMC cultures derived from 16 T1D DQ8(+) adolescents. Insulin B9-23, one dominant P-cell autoantigen, and the homologous sequence B11-25 of IGF-2 display the same affinity and fully compete for binding to DQ8, a MHC-II allele conferring major genetic susceptibility to type 1 diabetes (T1D). However, compared to insulin beta 9-23, presentation of IGF-2 B11-25 elicits a suppressive/regulatory cytokine profile with a higher number of IL-10-secreting cells (P < 0.05), a much higher ratio of IL-10/IFN-gamma (P < 0.01), as well as a lower number of IL-4-secreting cells (P < 0.05). Thus, with regard to T1D prevention, administration of IGF-2-derived self-antigen(s) seems to be an efficient approach that combines both antagonism for binding to a major susceptibility MHC-II allele, as well as downstream promotion of an antigen-driven tolerogenic response. [less ▲]

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See detailApplications of C and N stable isotopes to ecological and environmental studies in seagrass ecosystems
Lepoint, Gilles ULg; Dauby, Patrick ULg; Gobert, Sylvie ULg

in Marine Pollution Bulletin (2004), 49(11-12), 887-891

Stable isotopes of carbon and nitrogen are increasingly used in marine ecosystems, for ecological and environmental studies. Here, we examine some applications of stable isotopes as ecological integrators ... [more ▼]

Stable isotopes of carbon and nitrogen are increasingly used in marine ecosystems, for ecological and environmental studies. Here, we examine some applications of stable isotopes as ecological integrators or tracers in seagrass ecosystem studies. We focus on both the use of natural isotope abundance as food web integrators or environmental tracers and on the use of stable isotopes as experimental tools. As ecosystem integrators, stable isotopes have helped to elucidate the general structure of trophic webs in temperate, Mediterranean and tropical seagrass ecosystems. As environmental tracers, stable isotopes have proven their utility in sewage impact measuring and mapping. However, to make such environmental studies more comprehensible, future works on understanding of basic reasons for variations of N and C stable isotopes in seagrasses should be encouraged. At least, as experimental tracers, stable isotopes allow the study of many aspects of N and C cycles at the scale of a plant or at the scale of the seagrass ecosystem. (C) 2004 Elsevier Ltd. All rights reserved. [less ▲]

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See detailSurface modification of multiwalled carbon nanotubes by poly(2-vinylpyridine): Dispersion, selective deposition, and decoration of the nanotubes
Lou, Xudong; Detrembleur, Christophe ULg; Pagnoulle, Christophe et al

in Advanced Materials (2004), 16(23-24), 2123-2127

Polymer modification of carbon nanotubes is accomplished using a grafting-to approach. Radicals formed by the thermolysis of poly(2-vinylpyridine) terminated with a radical-stabilizing nitroxide can react ... [more ▼]

Polymer modification of carbon nanotubes is accomplished using a grafting-to approach. Radicals formed by the thermolysis of poly(2-vinylpyridine) terminated with a radical-stabilizing nitroxide can react with the surface of nanotubes, resulting in grafting densities up to 12 wt.-%. The modified nanotubes, which are easily dispersed in water, can immobilize metal nanoclusters on their surfaces. [less ▲]

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See detailApprentissage par problèmes, à distance. Présentation et analyse d'un dispositif de formation.
Dury, Cécile ULg

in Recherche en Soins Infirmiers (2004), 79

Cet article présente et analyse un dispositif de formation visant l’acquisition de compétences en soins infirmiers. Les objectifs poursuivis sont le développement: - d’une méthode pédagogique active ... [more ▼]

Cet article présente et analyse un dispositif de formation visant l’acquisition de compétences en soins infirmiers. Les objectifs poursuivis sont le développement: - d’une méthode pédagogique active : l’apprentissage par problèmes (APP) ; - de l’approche interdisciplinaire et interculturelle, les mêmes problèmes étant résolus par des étudiants de différentes disciplines et cultures ; - de l’utilisation des nouvelles technologies de l’information et de la communication (NTIC) afin de permettre une collaboration maximale « à distance » entre les différents partenaires du projet. L’analyse du dispositif montre que les objectifs pédagogiques poursuivis par l’APP sont atteints. L’approche pluridisciplinaire et pluriculturelle, pour être optimale, demande une grande coordination entre les partenaires, un équilibre entre les groupes d’étudiants des différents pays et disciplines, une formation et un soutien des tuteurs dans l’utilisation de la plate-forme d’enseignement à distance. [less ▲]

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See detailPrimary prevention of osteoporosis: Mass screening scenario or prescreening with questionnaires? An economic perspective
Richy, F.; Ethgen, Olivier ULg; Bruyère, Olivier ULg et al

in Journal of Bone and Mineral Research (2004), 19(12), 1955-1960

This study focuses on the controversy surrounding selective approaches to screen for osteoporosis. Seven screening approaches were compared in terms of cost-effectiveness and incremental cost ... [more ▼]

This study focuses on the controversy surrounding selective approaches to screen for osteoporosis. Seven screening approaches were compared in terms of cost-effectiveness and incremental cost-effectiveness ratios in a sample of 4035 postmenopausal women. Our results show that certain prescreening strategies are more efficient than DXA-based approaches. These results are of considerable value for health policy decision-makers and the scientific community. [less ▲]

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See detailGrazing buffalo on flooded pastures in the Brazilian Amazon region: a review
Camarao, A. P.; Lourenco, J. B.; Dutra, S. et al

in Tropical Grasslands (2004), 38(4), 193-203

There are almost 3.5 M head of buffalo in Brazil, half of which (+/- 1.75 M animals) are in the north, particularly on Marajo Island, in the lower and middle Amazon. and on upland cultivated pastures, 16 ... [more ▼]

There are almost 3.5 M head of buffalo in Brazil, half of which (+/- 1.75 M animals) are in the north, particularly on Marajo Island, in the lower and middle Amazon. and on upland cultivated pastures, 16% in the south-cast, 15% in the northeast, 13% in the central west and 6% in the south. The objective of this work was to review the important characteristics of the native pasture ecosystems grazed by buffalo in the flooded areas of the Brazilian Amazon. Data relative to environment, pasture characteristics and animal performance are presented. Three buffalo subspecies, bubalis (water buffalo - Mediterranean. Murrah, Jafarabadi), kerebau (swamp buffalo) and fulvus (Baio type) live in the Amazon Region, their ideal habitat. They are used for meat and milk and as a source of power, and are well adapted to wet conditions. producing and reproducing in flooded native pastures, where cattle don't usually survive. [less ▲]

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See detailPhylogeny, biogeography, and the evolution of life-history traits in Leucadendron (Proteaceae)
Barker, N. P.; Vanderpoorten, Alain ULg; Morton, C. M. et al

in Molecular Phylogenetics and Evolution (2004), 33(3), 845-860

Leucadendron is a moderately large genus of Proteaccae almost entirely restricted to the Cape Floristic Region of southern Africa. The genus is unusual in being dioecious and sexually dimorphic. ITS ... [more ▼]

Leucadendron is a moderately large genus of Proteaccae almost entirely restricted to the Cape Floristic Region of southern Africa. The genus is unusual in being dioecious and sexually dimorphic. ITS sequence data were obtained from 62 of the 96 currently recognized taxa (85 species and 11 subspecies). Phylogenetic analyses were conducted under Maximum Likelihood and parsimony and resolved nine groups of species with varying degrees of bootstrap support, but relationships between these groups are largely unsupported. The phylogeny conflicts with the current taxonomic arrangement, which is based mainly on fruit morphology. The two sections of the genus, Alatosperma and Leucadendron, and several subsections within these sections, are resolved as non-monophyletic. This means that taxonomically important characters (such as fruit shape) have evolved multiple times, as the species with nutlike fruit (resolved into two of the nine groups) appear to have evolved independently from ancestors with winged fruit. Based on the topology obtained, the life history traits of anemophily, myrmechochory, and re-sprouting have also originated multiple times. Dispersal-Vicariance (DIVA) analysis suggests that the genus had an ancestral area in the Karoo Mountain and Southeastern phytogeographic centres of endemism in the southwestern Cape. (C) 2004 Elsevier Inc. All rights reserved. [less ▲]

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See detailNo influence of 20 and 400 mu T 50 Hz magnetic field exposure on cognitive function in humans
Delhez, Marie; Legros, Jean-Jacques ULg; Crasson, Marion ULg

in Bioelectromagnetics (2004), 25(8), 592-598

The aim of the present study was to investigate cognitive effects of a continuous, vertical extremely low frequency (ELF) magnetic field (MF) of 20 and 400 muT 50 Hz in healthy young men during ... [more ▼]

The aim of the present study was to investigate cognitive effects of a continuous, vertical extremely low frequency (ELF) magnetic field (MF) of 20 and 400 muT 50 Hz in healthy young men during performance on cognitive tests. Thirty-two volunteers (20-30 years old, mean 22.6 +/- 2.2 years) participated in this double blind study. The test protocol consisted of a set of tests: divided attention, flexibility, memory updating, digit span, digit span with articulary suppression, and time perception. The total duration of the exposure was 65 min. Participants were assigned four sessions: three conditions in the helmet (sham exposure, 20 and 400 muT) and one condition out of the helmet (to control the expectancy effect). No effect of MF exposure was observed on performance. Bioelectromagnetics 25:592-598, 2004. (C) 2004 Wiley-Liss, Inc. [less ▲]

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See detailNumber of iterations when comparing MLEM/OSEM with FBP
Seret, Alain ULg

in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (2004), 45(12), 2125-2125

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See detailEffect of acidic ternary compounds on the formation of miconazole/cyclodextrin inclusion complexes by means of supercritical carbon dioxide
Barillaro, Valery; Bertholet, Pascal; Henry de Hassonville, Sandrine et al

in Journal of Pharmacy & Pharmaceutical Sciences : A Publication of the Canadian Society for Pharmaceutical Sciences (2004), 7(3), 378-388

PURPOSE: The aim of the study is to evaluate the effect of different acidic compounds on the inclusion of miconazole (MICO) in several cyclodextrins (CDs) using supercritical carbon dioxide (SCCO(2 ... [more ▼]

PURPOSE: The aim of the study is to evaluate the effect of different acidic compounds on the inclusion of miconazole (MICO) in several cyclodextrins (CDs) using supercritical carbon dioxide (SCCO(2) ) processing. METHODS: Physical mixtures were processed by SCCO(2) at 30 MPa, 125 degrees C during 60 minutes in a static mode to produce inclusion complexes. The inclusion complexes were characterized by differential solubility, Fourier transform infrared spectroscopy (FT-IR) and dissolution test. RESULTS: The best inclusion yields were achieved with the combination of MICO base and HPgammaCD with or without acids. Maleic and fumaric acids influenced the MICO inclusion differently in function of their conformation. During the process, a miconazole salt was observed with maleic acid and characterized by thermal analysis and mass spectrometry. The kinetics inclusion followed a saturation-type shape curve. FT-IR confirmed the presence of genuine inclusion complexes. The complexes MICO base/HPgammaCD/(L-tartaric acid) enhanced the dissolution rates of MICO more than the corresponding physical mixtures did. Lastly, the stability study revealed that the complexes were stable. CONCLUSIONS: The formation of stable complexes between MICO and CDs is possible using SCCO(2). Moreover an acidic ternary compound is able to modify the formation of the complex. The inclusion complexes, which show better dissolution profiles than those with the corresponding physical mixtures, could lead to an increase of the oral bioavailability of MICO. [less ▲]

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See detailLes travaux de la CPDT comme appui à la mise en oeuvre de la Convention européenne du Paysage en région wallonne
Droeven, Emilie ULg; Kummert, Magali

Conference given outside the academic context (2004)

Dès 2000, la Région wallonne a lancé un programme de recherche au sein de la Conférence Permanente du Développement Territorial (CPDT) pour répondre aux exigences de mise en œuvre de la Convention ... [more ▼]

Dès 2000, la Région wallonne a lancé un programme de recherche au sein de la Conférence Permanente du Développement Territorial (CPDT) pour répondre aux exigences de mise en œuvre de la Convention européenne du paysage. La communication s’attache à retracer le cheminement d’une partie de cette recherche jusqu’en novembre 2004. Toutes les contributions de la CPDT en la matière ne sont pas présentées ici. Dans un premier temps, les travaux se sont concentrés sur l’identification des macro-paysages wallons (carte des territoires paysagers) puis sur la mise au point d’une méthode d’identification des paysages patrimoniaux wallons. [less ▲]

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See detailLa fondation critique de la philosophie chez Heinrich Rickert
Dewalque, Arnaud ULg

Conference given outside the academic context (2004)

Je présente ici l’objectif de ma thèse, qui consiste à confronter deux méthodes pour aborder les problèmes philosophiques : la méthode phénoménologique et la méthode critique. Mon exposé est divisé en ... [more ▼]

Je présente ici l’objectif de ma thèse, qui consiste à confronter deux méthodes pour aborder les problèmes philosophiques : la méthode phénoménologique et la méthode critique. Mon exposé est divisé en trois parties : 1. je commence par élucider le thème d’une « fondation critique de la philosophie » d’après ses principes directeurs et son ancrage historique ; 2. ensuite, de façon plus ciblée, j’expose les grandes lignes de la théorie de la connaissance de Rickert, dont le but est précisément d’opérer une telle fondation ; 3. enfin, je souligne les implications de cette théorie pour la philosophie en général et plus particulièrement pour son rapport aux autres sciences. [less ▲]

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See detailAromatase inhibition blocks the expression of sexually-motivated cloacal gland movements in male quail
Taziaux, Mélanie ULg; Cornil, Charlotte ULg; Balthazart, Jacques ULg

in Behavioural Processes (2004), 67(3), 461-469

In Japanese quail (Coturnix japonica), activation of appetitive and consummatory aspects of male sexual behavior requires aromatization of testosterone (T) into estrogens. Appetitive male sexual behavior ... [more ▼]

In Japanese quail (Coturnix japonica), activation of appetitive and consummatory aspects of male sexual behavior requires aromatization of testosterone (T) into estrogens. Appetitive male sexual behavior (ASB) is usually assessed with the use of a learned social proximity procedure. In the present experiment, we investigated the role of estrogens in the activation of an another index of ASB. the female-induced activation of rhythmic cloacal sphincter movements (RCSMs) that are produced in reaction to the visual presentation of a female. Consummatory sexual behavior (CSB) was also assessed by the frequency and latency of copulatory behaviors. Castrated male quail were treated with Silastic implants filled with T in association with chronic injections of the aromatase inhibitor Vorozole(TM) (R83842; 1 mg/kg twice a day; CX + T + VOR group). Control birds were implanted with T capsules only (CX + T group). CSB was almost completely blocked by injections of the aromatase inhibitor. The RCSM frequency decreased progressively in the CX + T + VOR group by comparison with the CX + T group and was therefore significantly reduced at the end of the experiment. These results demonstrate that the frequency of RCSM, a second measure of ASB is, like the social proximity response and CSB, blocked by inhibition of estrogen production. It was shown previously that lesions of the preoptic area inhibit both aspects of the appetitive sexual behavior (proximity response and RCSM). It is therefore, likely that both responses are controlled, like copulation, by aromatase-containing neurons of the preoptic area. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

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