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See detailNote concernant l'évolution d'une population d'orchidées (Dactylorhiza majalis) au sein d'une prairie humide soumise à un pâturage tardif en région ardennaise (réserve naturelle de la Gotale - Manhay)
Rouxhet, Serge ULg

in Écho des Réserves (L') (2007), 3

Depuis 1990, une population d'orchis de mai (Dactylorhiza majalis) est suivie au niveau du site de la Gotale (commune de Manhay, province de Luxembourg). Cette population est localisée au sein d'une ... [more ▼]

Depuis 1990, une population d'orchis de mai (Dactylorhiza majalis) est suivie au niveau du site de la Gotale (commune de Manhay, province de Luxembourg). Cette population est localisée au sein d'une ancienne prairie humide ardennaise, sous statut de réserve naturelle RNOB depuis 1991. Après 17 années de comptages, des résultats sont présentés. [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 detailPartenariat F.N.P.S.M.S. - ULg / Rapport d'activité ULg 2006
Périlleux, Claire ULg; Van Kerkoven, Fabrizio; Jennès, Nicolas

Report (2007)

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See detailPolice administrative et sanction administrative
Pâques, Michel ULg

in Andersen, Robert; Déom, D.; Renders, D. (Eds.) Les sanctions administratives (2007)

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See detailEffects of non-genetic and crossbreeding factors on daily milk yield of Ayrshire x (Sahiwal x Ankole) cows in Mahwa station (Burundi)
Hatungumukama, G.; Sidikou, D. L.; Leroy, Pascal ULg et al

in Livestock Science (2007), 110(1-2), 111-117

The study was carried out at the Mahwa station located in Bututsi natural region in South of Burundi at 1850 m of altitude. The objective of the study was to assess the effects of days in milk, cow's ... [more ▼]

The study was carried out at the Mahwa station located in Bututsi natural region in South of Burundi at 1850 m of altitude. The objective of the study was to assess the effects of days in milk, cow's calving age, type of crossbreeding, year and month of lactation, parity on daily milk yield of crossbreds Ayrshire (AY) x Sahiwal (S) x Ankole (A) cows. Milk yields were obtained from 9 cows (S) that have been both milked and suckled during the entire lactation, on 8 cows (M) only milked during the entire lactation and on 150 cows (SM) suckled before and milked after weaning. Data were analyzed using the procedure GLM in SAS for S,M, and SM cows separately. All factors affected significantly daily milk yields (P < 0.001). Least-squares means (LSM) for daily milk yields were highest at the 8th (7.16 +/- 0.07 1), 8th (7.63 +/- 0.35 1), and 7th (7.34 +/- 0.39 1) day in milk for SM, S and M lactations, respectively. The Wood model was able to detect 2 main groups of curve shape: standard for SM and S cows and atypical decreasing for M cows. An important decrease in milk production was observed around the 120th day in SM cows corresponding to the weaning period. Crossbreeding improved milk production and highest yields were observed with 50% to 75% of Ayrshire inheritance (LSM = 5 +/- 0.05 to 5.51 +/- 0.02 1/day). A significant increase was observed from 1977 to 1992 due to the improvement of genetic and management techniques. During this period, LSM raised from 1.26 +/- 0.11 1 to 4.74 +/- 0.03 1 per day for SM cows. Unfortunately, the 1993 civilian war destabilized the managerial techniques and consequently, the milk production decreased in Mahwa station, In all cows, milk production was significantly higher from December to May (LSM - 3.96 +/- 0.03 1/day) during the rainy season than in September (LSM = 3.12 +/- 0.03 1/day) at the end of the dry season. (C) 2006 Elsevier B.V. All rights reserved. [less ▲]

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See detailIs there a role for orthopaedic ultrasonography in beef cattle? A single-centre retrospective study in Belgium.
Busoni, Valeria ULg; De Busscher, Virginie; Cavrenne, Romain

in Veterinary Radiology and Ultrasound (2007)

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See detailRégulation et dérégulation de l'âge pubertaire : populations à risque ?
Parent, Anne-Simone ULg; Domine, Françoise ULg; Charlier, Corinne ULg et al

in Revue Médicale de Liège (2007), 62

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See detailLa Belgique institutionnelle, quelques points de repère
Pâques, Michel ULg; Olivier, Marie

in Bayenet, B.; Carpon, H.; Liégeois, Ph. (Eds.) L'espace Wallonie-Bruxelles - Voyage au bout de la Belgique (2007)

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See detailLa forêt wallonne, réalités, enjeux et prospective
Rondeux, Jacques ULg

in Bourdeau, P.; Zaccaï, E. (Eds.) The Millennium Ecosystem Assessment: Implications for Belgium - Proceedings of a Conference held in Brussels on 27 October 2006 (2007)

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See detailBiomarker discovery for inflammatory bowel disease, using proteomic serum profiling
Meuwis, Marie-Alice ULg; Fillet, Marianne ULg; Geurts, Pierre ULg et al

in Biochemical Pharmacology (2007), 73(9), 1422-1433

Crohn's disease and ulcerative colitis known as inflammatory bowel diseases (IBD) are chronic immuno-inflammatory pathologies of the gastrointestinal tract. These diseases are multifactorial, polygenic ... [more ▼]

Crohn's disease and ulcerative colitis known as inflammatory bowel diseases (IBD) are chronic immuno-inflammatory pathologies of the gastrointestinal tract. These diseases are multifactorial, polygenic and of unknown etiology. Clinical presentation is non-specific and diagnosis is based on clinical, endoscopic, radiological and histological criteria. Novel markers are needed to improve early diagnosis and classification of these pathologies. We performed a study with 120 serum samples collected from patients classified in 4 groups (30 Crohn, 30 ulcerative colitis, 30 inflammatory controls and 30 healthy controls) according to accredited criteria. We compared protein sera profiles obtained with a Surface Enhanced Laser Desorption Ionization-Time of Flight-Mass Spectrometer (SELDI-TOF-MS). Data analysis with univariate process and a multivariate statistical method based on multiple decision trees algorithms allowed us to select some potential biomarkers. Four of them were identified by mass spectrometry and antibody based methods. Multivariate analysis generated models that could classify samples with good sensitivity and specificity (minimum 80%) discriminating groups of patients. This analysis was used as a tool to classify peaks according to differences in level on spectra through the four categories of patients. Four biomarkers showing important diagnostic value were purified, identified (PF4, MRP8, FIBA and Hpalpha2) and two of these: PF4 and Hpalpha2 were detected in sera by classical methods. SELDI-TOF-MS technology and use of the multiple decision trees method led to protein biomarker patterns analysis and allowed the selection of potential individual biomarkers. Their downstream identification may reveal to be helpful for IBD classification and etiology understanding. [less ▲]

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See detailAnalytical validation of the new version of the Liaison N-Tact PTH assay
Cavalier, Etienne ULg; Delanaye, Pierre ULg; Carlisi, Agnès et al

in Clinical Chemistry & Laboratory Medicine (2007), 45(1), 105-107

We performed analytical validation of the new version of the Liaison N-Tact PTH (parathormone) assay according to NCCLS guidelines and compared this new generation of reagent with the Roche Elecsys PTH ... [more ▼]

We performed analytical validation of the new version of the Liaison N-Tact PTH (parathormone) assay according to NCCLS guidelines and compared this new generation of reagent with the Roche Elecsys PTH assay. We showed that this new version is a sensitive and precise method with good recovery. Significant carryover was observed, but with limited clinical implications. We demonstrated that the new version of the Liaison PTH is in reasonably good agreement with the Roche Elecsys PTH assay, and as we observed no differences in a hemodialyzed population, moving from one method to the other should not affect the daily follow-up of patients. However, one should be cautious with the highest values (> 500 pg/mL). We established reference intervals of 12-54 pg/mL for the Liaison and 14-52 pg/mL for the Elecsys assay. [less ▲]

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See detailGestion du risque de sécheresse agricole au Maroc
Balaghi, Riad; Jlibene, Mohammed; Tychon, Bernard ULg et al

in Sécheresse (2007), 18(3), 169-176

Le risque de pénurie en eau au Maroc s’accroît sous la pression conjuguée de la sécheresse et de la demande domestique et industrielle. Il doit être pris en compte dans toute gestion de l’eau aussi bien ... [more ▼]

Le risque de pénurie en eau au Maroc s’accroît sous la pression conjuguée de la sécheresse et de la demande domestique et industrielle. Il doit être pris en compte dans toute gestion de l’eau aussi bien au niveau de l’agriculture pluviale qu’irriguée. Les stratégies pour réduire le risque de sécheresse agricole, peuvent être classées en trois catégories : i) en agriculture irriguée, économiser l’eau en réduisant les pertes et en améliorant l’efficience d’utilisation de l’eau \; ii) en zones forestières et pastorales, bénéficier de l’eau perdue actuellement par le processus d’évaporation en développant les écosystèmes pastoraux et fruitiers \; iii) en agriculture pluviale, augmenter la productivité par les techniques de conservation de l’eau qui consistent à améliorer la collecte, le stockage et l’utilisation de l’eau au niveau de l’exploitation. Des mesures publiques additionnelles sont nécessaires, principalement les systèmes d’alerte précoce incluant la prévision saisonnière du climat et la prévision agro-météorologique, pour promouvoir l’investissement dans les environnements secs et mettre à la disposition des agriculteurs et des pouvoirs publics des outils d’aide à la décision. L’adoption d’une gestion efficiente de l’eau de pluie et d’irrigation permettra d’assurer la sécurité alimentaire et de libérer l’eau pour les besoins non agricoles. [less ▲]

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See detailImportance of intertidal sediment processes and porewater exchange on the water column biogeochemistry in a pristine mangrove creek (Ras Dege, Tanzania)
Bouillon, Steven; Middelburg, Jack J.; Dehairs, Frank et al

in Biogeosciences (2007), 4

We sampled a tidal creek (Ras Dege, Tanzania) during a 24-h cycle to document the variations in a suite of creek water column characteristics and to determine the relative influence of tidal and ... [more ▼]

We sampled a tidal creek (Ras Dege, Tanzania) during a 24-h cycle to document the variations in a suite of creek water column characteristics and to determine the relative influence of tidal and biological driving forces. Since the creek has no upstream freshwater inputs, highest salinity was observed at low tide, due to evaporation effects and porewater seepage. Total suspended matter (TSM) and particulate organic carbon (POC) showed distinct maxima at periods of highest water flow, indicating that erosion of surface sediments and/or resuspension of bottom sediments were an important source of particulate material. Dissolved organic carbon (DOC), in contrast, varied in phase with water height and was highest at low tide. Stable isotope data of POC and DOC displayed large variations in both pools, and similarly followed the variations in water height. Although the variation of 13CDOC (−23.8 to −13.8‰) was higher than that of 13CPOC (−26.2 to −20.5‰), due to the different endmember pool sizes, the 13C signatures of both pools differed only slightly at low tide, but up to 9‰ at high tide. Thus, at low tide both DOC and POC originated from mangrove production. At high tide, however, the DOC pool had signatures consistent with a high contribution of seagrass-derived material, whereas the POC pool was dominated by marine phytoplankton. Daily variations in CH4, and partial pressure of CO2 (pCO2) were similarly governed by tidal influence and were up to 7- and 10-fold higher at low tide, which stresses the importance of exchange of porewater and diffusive fluxes to the water column. When assuming that the high dissolved inorganic carbon (DIC) levels in the upper parts of the creek (i.e. at low tide) are due to inputs from mineralization, 13C data on DIC indicate that the organic matter source for mineralization had a signature of −22.4‰. Hence, imported POC and DOC from the marine environment contributes strongly to overall mineralization within the mangrove system. Our data demonstrate how biogeochemical processes in the intertidal zone appear to be prominent drivers of element concentrations and isotope signatures in the water column, and how pathways of dissolved and particulate matter transport are fundamentally different. [less ▲]

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See detailPost-operative analgesia for minor hand surgery: comparison between two dosages of paracetamol
Legrand, Alexandre; Kirsch, Murielle ULg; Dresse, Caroline ULg et al

in Acta Anaesthesiologica Belgica (2007), 58(3), 221

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See detailOtage(s)
Durand, Pascal ULg

in Durand, Pascal (Ed.) Les Nouveaux Mots du Pouvoir. Abécédaire critique (2007)

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See detailMinkowski space structure of the Higgs potential in 2HDM
Ivanov, Igor ULg

in Physical Review. D : Particles and Fields (2007), 75

The Higgs potential of 2HDM keeps its generic form under the group of transformation GL(2,C), which is larger than the usually considered reparametrization group SU(2). This reparametrization symmetry ... [more ▼]

The Higgs potential of 2HDM keeps its generic form under the group of transformation GL(2,C), which is larger than the usually considered reparametrization group SU(2). This reparametrization symmetry induces the Minkowski space structure in the orbit space of 2HDM. Exploiting this property, we present a geometric analysis of the number and properties of stationary points of the most general 2HDM potential. In particular, we prove that charge-breaking and neutral vacua never coexist in 2HDM and establish conditions when the most general explicitly CP-conserving Higgs potential has spontaneously CP-violating minima. We also define the prototypical model of a given 2HDM, which has six free parameters less than the original one but still contains all the essential physics. Our analysis avoids manipulation with high-order algebraic equations. [less ▲]

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See detailEtude des séries chronologiques par les méthodes de lissage
Palm, Rodolphe ULg

in Notes de Statistique et d'Informatique (2007), (1), 1-22

This note briefly describes forecasting procedures for time series based on smoothing techniques. The following procedures are examined : exponential smoothing for non-seasonal time series showing no ... [more ▼]

This note briefly describes forecasting procedures for time series based on smoothing techniques. The following procedures are examined : exponential smoothing for non-seasonal time series showing no trend, Holt procedure for non-seasonal time series with trend and Holt-Winters procedure for time series containing trend and seasonal variation. The methods are illustrated by an example processed with Minitab software. [less ▲]

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