Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailNouvelles approches thérapeutiques puor l'hypernéphrome métastasique
Sylvestre, Rose-Marie; Jerusalem, Guy ULg; Sautois, Brieuc ULg et al

in Médecine et Hygiène (2001), 59

Detailed reference viewed: 327 (25 ULg)
Full Text
Peer Reviewed
See detailTiming of nitrogen application to improve quality, reduce lodging and minimise disease risks for hybrid and inbred wheat.
Bodson, Bernard ULg; Vancutsem, Françoise ULg; Falisse, André ULg

in Aspects of Applied Biology (2001), (64), 193-200

In Belgium results of many trials carried out during the last seven years show the possibility of changing timing of nitrogen application with dose reduction during tillering and transfering this amount ... [more ▼]

In Belgium results of many trials carried out during the last seven years show the possibility of changing timing of nitrogen application with dose reduction during tillering and transfering this amount to flag leeaf application; with this nitrogen dressing, grain proteins are higher and lodging and diseases risks are lower. [less ▲]

Detailed reference viewed: 39 (0 ULg)
Full Text
See detailÉvolution des accessibilités et des mobilités des localisations commerciales
Merenne-Schoumaker, Bernadette ULg

in Travaux de l’Institut de Géographie de Reims (2001), 27(107-108), 7-23

In order to be able to study the links between the evolution of accessibilities and mobilities and the dynamics of the commercial localizations, the article has been organized in three parts : firstly ... [more ▼]

In order to be able to study the links between the evolution of accessibilities and mobilities and the dynamics of the commercial localizations, the article has been organized in three parts : firstly, the definition of the concepts of accessibility and mobility as well as the distance; secondly, analysis of the role of these two concepts in the commercial field and the their most evident recent evolutions; lastly, research into corresponding links. On the basis of this work, everything indicates the priority of mobility over accessibility as well as very close relations between the mutations of urbanized territories and the installation of the new commercial framework, which is strongly governed by car mobility. [less ▲]

Detailed reference viewed: 59 (0 ULg)
Full Text
Peer Reviewed
See detailCell cycle activation of hematopoietic progenitor cells increases very late antigen-5-mediated adhesion to fibronectin.
Giet, Olivier ULg; Huygen, Sandra; Beguin, Yves ULg et al

in Experimental hematology (2001), 29(4), 515-24

Recent studies suggested that trafficking of hematopoietic progenitor cells is related to cell cycle status. We studied whether adhesion of progenitor cells to extracellular matrix proteins was modulated ... [more ▼]

Recent studies suggested that trafficking of hematopoietic progenitor cells is related to cell cycle status. We studied whether adhesion of progenitor cells to extracellular matrix proteins was modulated by cell cycle transit.Mobilized peripheral blood CD34+ cells were stimulated ex vivo for 48 hours with stem cell factor, flt-3 ligand, and thrombopoietin and fractionated by adhesion to fibronectin or vascular cell adhesion molecule-1 (VCAM-1). Adherent and nonadherent cells were assayed for cell cycle status, long-term culture-initiating cell frequency, and integrin function. Binding to fibronectin, but not to VCAM-1, displayed a cell cycle selectivity as the adherent fraction to fibronectin was enriched in cycling CD34+ cells and in cycling long-term culture-initiating cells compared to the nonadherent fraction. Combined cell cycle and phenotypic analysis showed that the expression of VLA-5 was upregulated during S/G2+M but that of VLA-4 remained constant. The selective binding of cycling CD34+ cells to fibronectin was reverted by anti-VLA-5 but not by anti-VLA-4 blocking antibodies. Also, cycling CD34+ cells preferentially adhered to the VLA-5 binding domain but not to the VLA-4 binding domain of fibronectin. Adhesion of cycling CD34+ cells to fibronectin was a reversible process modulated by cell cycle progression, because adherent cells could exit the cell cycle and return to a nonadhesive state within an additional 48-hour culture period.The results indicate that the enhanced binding capacity of cycling progenitor cells to fibronectin is mediated by VLA-5. [less ▲]

Detailed reference viewed: 31 (1 ULg)
Full Text
Peer Reviewed
See detailCessation of intensive treatment with recombinant human erythropoietin is followed by secondary anemia.
Piron, Maude ULg; Loo, Martine; Gothot, André ULg et al

in Blood (2001), 97(2), 442-8

Little information is available on the evolution of erythropoiesis after interruption of recombinant human erythropoietin (rHuEpo) therapy. Iron-overloaded rats received 20 daily injections of rHuEpo ... [more ▼]

Little information is available on the evolution of erythropoiesis after interruption of recombinant human erythropoietin (rHuEpo) therapy. Iron-overloaded rats received 20 daily injections of rHuEpo. During treatment, reticulocytes, soluble transferrin receptor (sTfR), and hematocrit increased progressively. This was accompanied by a substantial expansion of spleen erythropoiesis but a decrease in the bone marrow. Five weeks after treatment, rats developed a significant degree of a regenerative anemia. Erythropoietic activity, as assessed by reticulocytes, sTfR, erythroid cellularity, iron incorporation into heme, and the number of erythroid colonies, was severely depressed 3 weeks after cessation of rHuEpo. This was followed by regeneration of erythroblasts and reticulocytes at weeks 6 to 7 post-Epo, but erythroid progenitors recovered only partially by that time. The anemia was definitely corrected 2 months after cessation of rHuEpo treatment. Serum Epo levels remained elevated for several weeks, but the sensitivity of marrow erythroid precursors to Epo was preserved. No rat antibodies to rHuEpo were detected, and serum from post-Epo animals did not exert any inhibitory activity on erythropoiesis. In conclusion, after cessation of intensive rHuEpo therapy, there was a strong inhibition of erythropoietic activity with secondary anemia followed by late recovery. This was not due to antibodies or other soluble inhibitory factors, a defect in endogenous Epo production, or a loss of sensitivity to Epo. This may rather represent intrinsic erythroid marrow exhaustion, mostly at the level of erythroid progenitors but also at later stages of erythropoiesis. [less ▲]

Detailed reference viewed: 34 (7 ULg)
Full Text
See detailLes mots pour le dire
Delville, Michel ULg

Article for general public (2001)

Detailed reference viewed: 13 (2 ULg)
Full Text
Peer Reviewed
See detailEtude empirique des estimateurs des taux d'erreur en analyse discriminante
Piraux, François; Palm, Rodolphe ULg

in Revue de Statistique Appliquée (2001), XLIX(4), 71-85

Monte Carlo experiments are performed to compare ten parametric and six non parametric estimators of the three error rates (actual, expected and optimal error rate) in discriminant analysis. This ... [more ▼]

Monte Carlo experiments are performed to compare ten parametric and six non parametric estimators of the three error rates (actual, expected and optimal error rate) in discriminant analysis. This comparison is restricted to the context of two p-dimensional normal group conditional distributions with the same covariance matrix. The study shows that certain estimators are markedly superior and users should be warned against some estimators available in statistical softwares. [less ▲]

Detailed reference viewed: 31 (1 ULg)
Full Text
See detailLes aptitudes agricoles et pastorales des sols dans les pays du CILSS
Djaby, Bakary ULg; Koné, Brahima; Labo, Moussa et al

Report (2001)

Detailed reference viewed: 77 (11 ULg)
Full Text
Peer Reviewed
See detailStability of perturbed functional differential equations and stabilization of nonlinear cascades
Michiels, Wim; Sepulchre, Rodolphe ULg; Roose, Dirk

in SIAM Journal on Control & Optimization (2001), 40

In this paper the effect of bounded input perturbation on the stability of nonlinear globally asymptotically stable delay differential equations is analyzed. We investigate under which conditions global ... [more ▼]

In this paper the effect of bounded input perturbation on the stability of nonlinear globally asymptotically stable delay differential equations is analyzed. We investigate under which conditions global stability in preserved and if not, whether semi-global stabilization is possible by controlling the size or shape of the perturbation. This results in a general framework, in which the stabilization of partial linear cascade systems using partial state feedback can be treated systematically. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailDes gribouillis aux premières lettres : le développement précoce de l’écrit.
Maillart, Christelle ULg; Schelstrate, Marie-Anne

in Langage et l'Homme (Le) : Recherches Pluridisciplinaires sur le Langage (2001), 34(2), 103-120

Detailed reference viewed: 45 (0 ULg)
Full Text
See detailThe NOy budget above Jungfraujoch: long-term evolution, family partition and model comparison
Demoulin, Philippe ULg; Mahieu, Emmanuel ULg; Zander, Rodolphe ULg et al

in Abstracts presented at the NDSC 2001 Symposium: Celebrating 10 years of atmospheric research (2001)

Based on high-resolution solar spectra recorded with FTIR instruments at the University of Liège laboratory located at the Jungfraujoch NDSC station (Swiss Alps, 46.5ºN, 8ºE, altitude 3580 m), the most ... [more ▼]

Based on high-resolution solar spectra recorded with FTIR instruments at the University of Liège laboratory located at the Jungfraujoch NDSC station (Swiss Alps, 46.5ºN, 8ºE, altitude 3580 m), the most important constituents making up the NOy family have been measured consistently since the mid-1980s. They include HNO3, NO, NO2 and ClONO2, which are analyzed in terms of their vertical column abundances above the site. Related trends have been determined and assessed statistically. Among these, only ClONO2 and NO2 reveal significant long-term trends. The combined column evaluation of NOy indicates a rate of change equal to (0.1+/-0.2) %/year, thus statistically undefined and barely consistent with the evolution of the source gas N2O. Trends derived from the observations will be compared critically with those deduced from a long-term run of a 2-D stratospheric model developed at the University of Oslo. The model includes full gaseous chemistry, PSCs and sulfate particles, which vary from year to year. Comparisons with similar data found in the literature are also discussed. [less ▲]

Detailed reference viewed: 7 (5 ULg)
Full Text
Peer Reviewed
See detailPlant monitoring and fault detection - Synergy between data reconciliation and principal component analysis
Amand, Thierry; Heyen, Georges ULg; Kalitventzeff, Boris ULg

in Computers & Chemical Engineering (2001), 25(4-6), 501-507

Data reconciliation and principal component analysis are tno recognised statistical methods used for plant monitoring and fault detection. We propose to combine them for increased efficiency. Data ... [more ▼]

Data reconciliation and principal component analysis are tno recognised statistical methods used for plant monitoring and fault detection. We propose to combine them for increased efficiency. Data reconciliation is used in the first step of the determination of the projection matrix for principal component analysis (eigenvectors). principal component analysis can then be applied to raw process data for monitoring purpose. The combined use of these techniques aims at a better efficiency in fault detection. It relies mainly in a lower number of components to monitor. The method is applied to a modelled ammonia synthesis loop. (C) 2001 Elsevier Science Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 18 (3 ULg)
Full Text
See detailIntroduction à la sociologie des champs symboliques
Durand, Pascal ULg

in Fonkoua A.; Halen P. (Eds.) Les champs littéraires africains (2001)

Detailed reference viewed: 119 (11 ULg)
Full Text
See detailDe Europese insolventieverordening
Wautelet, Patrick ULg

in van Houtte, Hans; Pertegás Sender, Marta (Eds.) Het nieuw Europees ipr : van verdrag naar verordening (2001)

This paper - written for a conference held in Leuven (KUL) in 2001- offers a global analysis of the European Insolvency Regulation. At the time the paper was written, the Regulation was a very recent ... [more ▼]

This paper - written for a conference held in Leuven (KUL) in 2001- offers a global analysis of the European Insolvency Regulation. At the time the paper was written, the Regulation was a very recent instrument. The paper reviews the Regulation based on previous experiences at harmonising the law of cross-border insolvencies (such as the European Insolvency Convention and the Istanbul Convention). Particular attention is paid to the issues of jurisdiction (which court has jurisdiction to open insolvency proceedings), jurisdiction conflicts (what happens if two courts decide to exercise jurisdiction simultaneously) and recognition and enforcement of foreign insolvency judgments. [less ▲]

Detailed reference viewed: 89 (0 ULg)
Full Text
Peer Reviewed
See detailEcosystem disturbances: an opportunity for biodiversity persistence
Patiny, Sébastien; Francis, Frédéric ULg; Haubruge, Eric ULg et al

in Abstract book (2001)

Detailed reference viewed: 10 (3 ULg)
Full Text
Peer Reviewed
See detailEvaluation of aphidophagous ladybird populations in a vegetable crop and implications as biological agents
Francis, Frédéric ULg; Colignon, Pierre; Haubruge, Eric ULg et al

in Med. Fac. Landbouw. Univ. Gent (2001), 66(2a), 333-340

Detailed reference viewed: 13 (3 ULg)