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See detailPreliminary results of an observational campaign aiming at the study of the binary system LSS3074
Gosset, Eric ULg; Rauw, Grégor ULg; Manfroid, Jean ULg et al

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

We present preliminary results of an observational campaign aiming at the study of the binary system LSS3074. A new lightcurve clearly indicates that the system is in contact. Recent spectroscopy broadly ... [more ▼]

We present preliminary results of an observational campaign aiming at the study of the binary system LSS3074. A new lightcurve clearly indicates that the system is in contact. Recent spectroscopy broadly confirms the previous results and the rather low masses of both components (O4f[SUP]+[/SUP] and O6-7:(f):). We further analyse an XMM-Newton observation of the object that indicates a rather hard X-ray spectrum. This is partly due to the high interstellar extinction towards the object but also to the high plasma temperature (kT Ë 1.2-1.3 keV). [less ▲]

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See detailAre WC9 Wolf-Rayet stars in colliding-wind binaries?
Williams, P. M.; van der Hucht, K. A.; Rauw, Grégor ULg

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

We present results from a spectroscopic search for massive companions to dust-making Galactic WC9 stars as a step to testing the paradigm that dust formation in these systems requires colliding winds to ... [more ▼]

We present results from a spectroscopic search for massive companions to dust-making Galactic WC9 stars as a step to testing the paradigm that dust formation in these systems requires colliding winds to produce over densities. We find evidence for OB companions to the WC9 stars WR 59 and WR 65, but not WR 121 or WR 117. We identify lines of N III-V and possibly N II in the spectrum of WR 88, one of the few Galactic WC9 stars which do not make circumstellar dust, and suggest that WR 88 is a transitional WN--WC9 object and less evolved than the other WC9 stars. On the other hand, the possible identification of a strong emission line at 4176 in the spectrum of WR 117 with Ne I suggests that this star is more evolved than other WC9 stars studied. [less ▲]

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See detailThe XMM-Newton view of Plaskett's star and its surroundings
Linder, N.; Rauw, Grégor ULg

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

XMM data of Plaskett's star (HD 47129) are used in order to analyse its X-ray spectrum and variability and hence to derive further constraints on the wind interaction in this early-type binary (O6 I + O7 ... [more ▼]

XMM data of Plaskett's star (HD 47129) are used in order to analyse its X-ray spectrum and variability and hence to derive further constraints on the wind interaction in this early-type binary (O6 I + O7.5 I) system. Combining the information provided by the EPIC and RGS instruments, we find that the X-ray spectrum of Plaskett's star is dominated by thermal plasma at lower energies, whereas the higher energy part (> 3 keV) could probably best be represented by a featureless power law component since we do not detect a significant Fe-K line. Our tests also suggest that an overabundance in nitrogen by a factor Ë 6 might be indicated to best represent the RGS spectrum. On the other hand, 71 X-ray sources have been detected in Plaskett's star field of view and most of them have counterparts in near-IR colours that are consistent with slightly reddened main-sequence objects. Actually, a sizeable fraction of the X-ray sources in the EPIC images could be either foreground or background sources with no direct connection to HD 47129. [less ▲]

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Peer Reviewed
See detailOn the potential of extrasolar planet transit surveys
Gillon, Michaël ULg; Courbin, F.; Magain, Pierre ULg et al

in Astronomy and Astrophysics (2005), 442

We analyse the respective benefits and drawbacks of ground-based and space-based transit surveys for extrasolar planets. Based on simple but realistic assumptions about the fraction of lower main sequence ... [more ▼]

We analyse the respective benefits and drawbacks of ground-based and space-based transit surveys for extrasolar planets. Based on simple but realistic assumptions about the fraction of lower main sequence stars harboring telluric and giant planets within the outer limit of the habitable zone, we predict the harvests of fictitious surveys with three existing wide field optical and near-IR cameras: the CFHT-Megacam, SUBARU-Suprime and VISTA-IR. An additional promising instrument is considered, VISTA-Vis, currently under development. The results are compared with the harvests predicted under exactly the same assumptions, for the space missions COROT and KEPLER. We show that ground-based wide field surveys may discover more giant planets than space missions. However, space surveys seem to constitute the best strategy to search for telluric planets. In this respect, the KEPLER mission appears 50 times more efficient than any of the ground-based surveys considered here. KEPLER might even discover telluric planets in the habitable zone of their host star. [less ▲]

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See detailOptimization of BaZrO3 sintering by control of the initial powder size distribution; a factorial design statistical analysis
Guillaume, Bernard ULg; Boschini, Frédéric ULg; Garcia-Cano, I. et al

in Journal of the European Ceramic Society (2005), 25(16), 3593-3604

A factorial design statistical analysis has been conducted in order to obtain the optimum conditions in the solid state sintering process of barium zirconate bulk materials, optimum with respect to ... [more ▼]

A factorial design statistical analysis has been conducted in order to obtain the optimum conditions in the solid state sintering process of barium zirconate bulk materials, optimum with respect to density, closed and open porosities. The optimized heat treatment permits to sinter a 99% dense barium zirconate sample at 1650 degrees C during only 2 h. When the temperature is higher than 1650 degrees C or when the heating time is longer than 2 h, a decrease in density is observed. (c) 2004 Elsevier Ltd. All rights reserved. [less ▲]

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See detailLes obligations juridiques de cohérence du droit ou comment le droit se protège contre lui-même
Delnoy, Michel ULg

in Biquet, Christine; Deliège, Alain; Lecocq, Pascale (Eds.) et al Liber Amicorum Paul Delnoy (2005)

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See detailIMPACT DE L’EVOLUTION REGLEMENTAIRE EUROPEENNE SUR LES PRATIQUES AGRICOLES DES EXPORTATEURS ACP ET PROGRAMME DE FORMATION DES CADRES DES ENTREPRISES MIS EN PLACE POUR LE PROGRAMME PIP DU COLEACP
Schiffers, Bruno ULg

Conference (2005, November)

La succession des crises alimentaires a poussé les consommateurs européens à exiger toujours plus de garantie quant à la sécurité de l’alimentation destinée à l’homme et aux animaux d’élevage. La ... [more ▼]

La succession des crises alimentaires a poussé les consommateurs européens à exiger toujours plus de garantie quant à la sécurité de l’alimentation destinée à l’homme et aux animaux d’élevage. La législation européenne a, en conséquence, évolué rapidement et le niveau d’exigence s’est fortement accru, le principe de base étant pour le producteur, l’importateur et le distributeur de pouvoir prouver aux autorités compétentes que toutes les précautions ont été prises, qu’une traçabilité des produits entrant dans la chaîne alimentaire existe et que, en cas de problème avéré ou suspecté, une procédure de notification, de rappel ou de retrait a été prévue et mise en place. Pour les producteurs ACP, ces évolutions les ont conduit à devoir modifier dans l’urgence leurs pratiques. La réussite de la mise en conformité et la mise en pratique dans les entreprises d’une politique de management de la qualité a exigé un effort important de formation non seulement au niveau des managers, des cadres et du personnel des entreprises, mais aussi au niveau de tous les acteurs qui gravitent autour de la filière « fruits et légumes d’exportation ». Le PIP a développé un dispositif de formation basé sur la capitalisation de compétences chez les acteurs locaux : prestataires de services et formateurs ACP, cadres techniques intermédiaires, responsables de laboratoire, agents de l’état chargés du contrôle, etc. Commencées depuis 2003, les actions du PIP en faveur des entreprises ACP concernent à présent plus de 80% du tonnage des fruits et légumes frais (hors bananes) exportés vers l’Union européenne. [less ▲]

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See detailA nation-wide project for the revision of the Belgian Nursing Minimum Dataset: from concept to implementation
THONON, Olivier ULg; CODOGNOTTO, Jean ULg; GILLET, Pierre ULg et al

in EfCCNa (Ed.) Proceedings of the 2nd Congress of the EfCCNa (2005, November)

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See detailCampagne de mesure des odeurs sur le CET et la zone de compostage de Habay Estimation des nuisances olfactives
Nicolas, Jacques ULg; Denne, Pierre; Cobut, Pierre

Report (2005)

The study is conducted in the frame of a programme of monitoring of all landfill sites in Wallonia. The "odour" part is assigned to ULg. The present report concerns more particularly the landfill and ... [more ▼]

The study is conducted in the frame of a programme of monitoring of all landfill sites in Wallonia. The "odour" part is assigned to ULg. The present report concerns more particularly the landfill and composting site of Habay. Besides the usual field inspection technique, the research group has used GC-MS to estimate the chemical composition of the atmosphere over the composting area. [less ▲]

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See detailAstrophysics, and how to attract young people into Physics
Nazé, Yaël ULg; Stavinschi, Magda; Vanherck, Martine ULg

Book (2005)

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See detailMassive Stars and High-Energy Emission in OB Associations
Rauw, Grégor ULg; Nazé, Yaël ULg; Blomme, Ronny et al

Book (2005)

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See detailStress factors and associated physically based criteria and conclusions on the directions to be followed for developing a physically based vulnerability assessment method
Gardin, Nicolas; Wojda, Piotr; Brouyère, Serge ULg

Report (2005)

The specific results and outcomes of this deliverable is the proposition of a methodological framework for groundwater vulnerability assessment to any kind of stress factors, from a physically-based point ... [more ▼]

The specific results and outcomes of this deliverable is the proposition of a methodological framework for groundwater vulnerability assessment to any kind of stress factors, from a physically-based point of view. This methodology is in addition compatible with the well-known EU DPSIR framework for analysis from a physical and socio-economical perspective, environmental problems. From a more generic perspective, this deliverable provides a very convenient and rigorous framework for integrating the various research components developed within the project, into a decision support system, integrating environmental problems, data, processes and models, and socio-economical aspects. [less ▲]

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See detailSpecificity and reversibility of the transpeptidation reaction catalyzed by the Streptomyces R61 D-Ala-D-Ala peptidase
Rhazi, Noureddine ULg; Delmarcelle, Michaël ULg; Sauvage, Eric ULg et al

in Protein Science (2005), 14(11), 2922-2928

The specificity of the Streptomyces R61 penicillin-sensitive D-Ala-D-Ala peptidase has been re-examined with the help of synthetic substrates. The products of the transpeptidation reactions obtained with ... [more ▼]

The specificity of the Streptomyces R61 penicillin-sensitive D-Ala-D-Ala peptidase has been re-examined with the help of synthetic substrates. The products of the transpeptidation reactions obtained with Gly-L-Xaa dipeptides as acceptor substrates are themselves poor substrates of the enzyme. This is in apparent contradiction with the classically accepted specificity rules for D-Ala-D-Ala peptidases. The Gly-L-Xaa dipeptide is regenerated by both the hydrolysis and transpeptidation reactions. The latter reaction is observed when another Gly-L-Xaa peptide or D-Alanine are supplied as acceptors. Utilization of substrates in which the terminal -COO(-) group has been esterified or amidated shows that a free carboxylate is not an absolute prerequisite for activity. The results are discussed in the context of the expected reversibility of the transpeptidation reaction. [less ▲]

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See detailProduction ligneuse de la forêt wallonne, l'apport de l'inventaire permanent régional
Rondeux, Jacques ULg; Hebert, Jacques ULg; Bourland, Nils ULg et al

in Forêt Wallonne (2005), (79), 3-18

En Région wallonne, l’inventaire permanent des ressources forestières, mis en place en 1994, permet aujourd’hui de fournir des chiffres d’accroissement basés sur une méthodologie rigoureuse. Les chiffres ... [more ▼]

En Région wallonne, l’inventaire permanent des ressources forestières, mis en place en 1994, permet aujourd’hui de fournir des chiffres d’accroissement basés sur une méthodologie rigoureuse. Les chiffres donnés dans cet article permettent de mieux appréhender la capacité actuelle de production de nos forêts en se basant sur une approche scientifique et non sur des hypothèses. Les principaux résultats sont issus de mesurages réalisés entre novembre 1999 et 2001 et concernent une période d’accroissement de 5 ans. Ces mesures ont permis de se faire une idée de la production moyenne en volume de nos principales essences dont les grandes tendances sont les suivantes : • la production annuelle en volume de l’ensemble de la forêt wallonne productive est estimée à 10,1 m3/ha/an (dont 53 % de cette valeur est à charge de la forêt privée) ; • la production en volume des résineux est de 16,4 m3/ha/an et celle des feuillus s’élève à 5,4 m3/ha/an ; • les prélèvements correspondent à 65 % de la production en feuillu et à 109 % de celle des résineux, dans l’état actuel des surfaces occupées par classe d’âge ou stade de développement des peuplements. [less ▲]

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See detailReport on extrapolated time trends at test sites
Broers, H.P.; Visser, A.; Pinault, J.L. et al

Report (2005)

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See detailReport with documentation of reconstructed land use around test sites
Broers, H.P.; Visser, A.; Dubus, I.G. et al

Report (2005)

The establishment of tools for trends analysis in groundwater is essential for the prediction and evaluation of measures taken within context of the Water Framework Directive and the draft Groundwater ... [more ▼]

The establishment of tools for trends analysis in groundwater is essential for the prediction and evaluation of measures taken within context of the Water Framework Directive and the draft Groundwater Directive. This report describes the historic development of contaminant inputs into the groundwater system for the TREND 2 subcatchments. The historic input data are essential to interprete and understand time trends in groundwater, which is the focus of coming deliverables. The emphasis is on diffuse contaminants and includes figures of 1950-present nitrogen inputs fot the Wallonian and Dutch Meuse catchments and the German Schleswig-Holstein catchments. For the Dutch Meuse basin also historical inputs of P, K, S, Ca, Mg, Na, Zn and Cd were estimated. Inputs of the pesticide atrazine were estimated for the small French Brévilles catchment, using interviews with farmers. On a regional scale, all of these cases show increasing inputs up to about 1985 and a decrease afterwards due to regulations from that time on. Trends in inputs of other diffuse pollutants (cations, heavy metals, pesticides) seem to be correlated to the well established nitrogen inputs. The effects of this increase and subsequent decrease on concentrations in the groundwater system will be analysed in further work within TREND2. [less ▲]

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See detailL'anemie chronique dans les maladies inflammatoires de l'intestin: revue de litterature
Vijverman, A.; Belaiche, Jacques ULg; Louis, Edouard ULg

in Revue Médicale de Liège (2005), 60(11), 888-92

Chronic anemia has been considered as an overlooked complication of inflammatory bowel disease (IBD). However it deserves full attention since even mild to moderate anemia has significant impact on ... [more ▼]

Chronic anemia has been considered as an overlooked complication of inflammatory bowel disease (IBD). However it deserves full attention since even mild to moderate anemia has significant impact on quality of life. During the past decade relevant progress has been made in the understanding and treatment of this pathology. In our review, we focus on frequency, mechanisms, diagnosis and treatment of anemia in IBD. [less ▲]

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