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See detailA histologic study of the extracellular matrix during the development of glomerulosclerosis in murine chronic graft-versus-host disease.
Bergijk, E. C.; Munaut, Carine ULg; Baelde, J. J. et al

in American Journal of Pathology (1992), 140(5), 1147-56

The development of glomerulosclerosis was studied in murine chronic graft-versus-host disease (GvHD), which is a model for human systemic lupus erythematosus. The authors investigated the distribution ... [more ▼]

The development of glomerulosclerosis was studied in murine chronic graft-versus-host disease (GvHD), which is a model for human systemic lupus erythematosus. The authors investigated the distribution patterns of six components of the extracellular matrix (ECM), i.e., laminin, fibronectin, collagen types I, III, IV, and VI during the course of the disease. All of these ECM components except collagen type I were found in the glomeruli of normal mice, where all of them were intrinsic constituents of the mesangium. Laminin, fibronectin, and collagen type IV were also found in the glomerular capillary walls. Starting 6 weeks after the induction of GvHD and continuing at week 8, the onset of an expansion of the mesangial matrix was observed. At the same time, the amounts of laminin, fibronectin, and collagen types IV and VI increased. Ten weeks after the onset of the disease, glomerulosclerosis developed. Traces of the interstitial collagen type I were found in sclerotic glomeruli. The levels of four ECM components, i.e., collagens III, IV, VI, and laminin were markedly decreased in the sclerotic glomeruli as compared with week 8. In contrast, the amount of fibronectin in the sclerotic glomeruli increased dramatically. Immunoelectron microscopic examination showed fibronectin in the sclerotic lesions, in contrast to laminin, collagen type I, and collagen type IV. It is concluded that the sclerotic lesions in murine chronic GvHD contain fibronectin. The small amounts of the ECM components laminin, as well as collagens III, IV, and VI in the sclerotic glomeruli in GvHD, might represent remnants of mesangial material and collapsed capillary walls. These components are probably replaced by increased production and/or accumulation of collagen type I and fibronectin. [less ▲]

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See detailLa francophonie encore et toujours en question
Defays, Jean-Marc ULg

in Bulletin Francophone de Finlande (1992), (8), 3-6

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See detailSynthèse, étude théorique et évaluation biologique de dérivés du 4-amino-4H-1,2,4-triazole analogues des antibiotiques b-lactamiques
Pirotte, Bernard ULg; Dive, Georges ULg; Delarge, Jacques et al

in European Journal of Medicinal Chemistry (1992), 27(3), 193-205

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See detailHémodialyse et hyperferritinémie
Paris, M.; Benoit, M. O.; Bied, A. et al

in Annales de Biologie Clinique (1992), 50(4), 251-258

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See detailLa régulation de l'expression des gènes du virus de la varicelle et du zona
Piette, Jacques ULg; Defechereux, Patricia; Baudoux, Laurence et al

in Annales de Médecine Vétérinaire (1992), 136(8), 627-635

Varicella-zoster virus (VZV) belongs to the alphaherpesvirus family and shares many important structural and functional similarities with other members of the family such as herpes simplex virus type 1 ... [more ▼]

Varicella-zoster virus (VZV) belongs to the alphaherpesvirus family and shares many important structural and functional similarities with other members of the family such as herpes simplex virus type 1 (HSV-1). VZV is responsible for two different clinical syndromes, varicella which is the result of the primary infection and zoster which is due to virus reactivation remaining latent in the peripheral nervous system. VZV DNA is 124,884 base pair long and encodes four regulatory proteins (IE4, IE61, IE62 and IE63). Using transient expression systems, we have shown that IE4, IE62 and IE63 can regulate the expression of an indicator gene driven by various VZV promoter regions, demonstrating that these proteins play important roles in the infectious cycle. [less ▲]

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See detailStructure du 6-(4-méthylpipérazin-1-yl)-11H-pyrido[2,3-b][1,4]benzodiazépine 1,5-hydrate
Dupont, L.; Englebert, S.; Dideberg, O. et al

in Acta Crystallographica Section C-Crystal Structure Communications (1992), C48

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See detailLe triticale en alimentation animale.
Thewis, André ULg; Leterme, Pascal

in Elevages Belges (1992), 46(7-8), 27-31

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See detailIn-vitro evaluation of drugs proposed as chondroprotective agents.
Bassleer, C.; Henrotin, Yves ULg; Franchimont, P.

in International Journal of Tissue Reactions (1992), 14(5), 231-41

Three proposed chondroprotective agents (CP), namely glucosamine sulfate (GAS), chondroitin sulfate (CS) and glycosaminoglycan-peptide complex (GP-C), were tested on differentiated human articular ... [more ▼]

Three proposed chondroprotective agents (CP), namely glucosamine sulfate (GAS), chondroitin sulfate (CS) and glycosaminoglycan-peptide complex (GP-C), were tested on differentiated human articular chondrocytes cultured in clusters. Chondrocyte productions of proteoglycans (PG), type II collagen (coll. II) and prostaglandin E2 (PGE2) were established by specific radioimmunoassays applied to the culture medium (CM) and in chondrocyte clusters (CC). Collagenolytic activity was assayed in CM. DNA synthesis, studied by measuring 3H-thymidine incorporation, was unaffected by CS and GAS. GP-C, at low concentration, stimulated DNA synthesis. GP-C, at higher doses, induced a high increase in PG and coll. II productions. GAS and CS induced a stimulatory effect limited to PG production. None of the CP tested here affected the basal PGE2 production by human chondrocytes. [less ▲]

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See detailCalcul des flux souterrains échangés entre le Canal Albert, la Meuse et sa plaine alluviale de Monsin à Lanaye
Dassargues, Alain ULg

in Annales de la Société Géologique de Belgique (1992), 115(1), 63-75

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See detailLa répartition des noms propres dans les œuvres érotiques d’Ovide
Purnelle, Gérald ULg

in Revue. Informatique et Statistique dans les Sciences Humaines (1992)

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See detailRemotely sensed data contributes to GIS socioeconomic analysis
Donnay, Jean-Paul ULg

in GIS-Europe (1992), 1(10), 38-41

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See detailThe effects of selection on linkage analysis for quantitative traits
Mackinnon, M. J.; Georges, Michel ULg

in Genetics (1992), 132

The effects of within-sample selection on the outcome of analyses detecting linkage between genetic markers and quantitative traits were studied. It was found that selection by truncation for the trait of ... [more ▼]

The effects of within-sample selection on the outcome of analyses detecting linkage between genetic markers and quantitative traits were studied. It was found that selection by truncation for the trait of interest significantly reduces the differences between marker genotype means thus reducing the power to detect linked quantitative trait loci (QTL). The size of this reduction is a function of proportion selected, the magnitude of the QTL effect, recombination rate between the marker locus and the QTL, and the allele frequency of the QTL. Proportion selected was the most influential of these factors on bias, e.g., for an allele substitution effect of one standard deviation unit, selecting the top 80%, 50% or 20% of the population required 2,6 or 24 times the number of progeny, respectively, to offset the loss of power caused by this selection. The effect on power was approximately linear with respect to the size of gene effect, almost invariant to recombination rate, and a complex function of QTL allele frequency. It was concluded that experimental samples from animal populations which have been subjected to even minor amounts of selection will be inefficient in yielding information on linkage between markers and loci influencing the quantitative trait under selection. [less ▲]

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See detailAccurate lifetime measurements of the 2p3d 1D° and 2p3d 3P°2 levels in N II with the beam-foil-laser method
Bastin, Thierry ULg; Baudinet-Robinet, Y.; Garnir, Henri-Pierre ULg et al

in Z. Phys. D (1992), 24

We have obtained accurate values for the radiative lifetimes of the 2p 3d 1D° and 2p 3d 3po levels in NII by the cascade-free beam-foil-laser spectroscopy method. Our results are 1r(2p3d 1D°)=0.346_0.012 ... [more ▼]

We have obtained accurate values for the radiative lifetimes of the 2p 3d 1D° and 2p 3d 3po levels in NII by the cascade-free beam-foil-laser spectroscopy method. Our results are 1r(2p3d 1D°)=0.346_0.012 ns and z(2p 3d 3P°)=0.457+0.020 ns. Comparison of these results with experimental and recent theoretical lifetimes reported previously is also made. [less ▲]

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See detailL'évaluation des méthodes diagnostiques
Thiry, Etienne ULg; Pastoret, Paul-Pierre ULg

in Annales de Médecine Vétérinaire (1992), 136

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See detailLight scattering by rough surfaces: Electromagnetic model for lighting simulations
Embrechts, Jean-Jacques ULg

in Lighting Research & Technology (1992), 24(4)

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See detailLand subsidence in Shanghai: hydrogeological conditions and subsidence measurements
Dassargues, Alain ULg; Zhang, J.

in Bulletin of Engineering Geology & the Environment (1992), 46

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See detailMolecular dissection of the Bovine Leukemia Virus external envelope glycoprotein using synthetic peptides.
Callebaut, Isabelle; Burny, Arsène; Krchnak, Viktor et al

in AIDS Research and Human Retroviruses (1992), 8

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See detailCellular localization of IGF-I and IGF-II mRNAs in immature hypophysectomized rat testis and epididymis after in vivo hormonal treatment.
Dombrowicz, D.; Hooghe-Peters, E. L.; GOTHOT, André ULg et al

in Archives internationales de physiologie, de biochimie et de biophysique (1992), 100(5), 303-8

IGF-I and II genes expression has been localized by in situ hybridization in testis and epididymis of immature hypophysectomized rats treated in vivo with either pFSH, hLH, bGH, hPRL or with saline. IGF-I ... [more ▼]

IGF-I and II genes expression has been localized by in situ hybridization in testis and epididymis of immature hypophysectomized rats treated in vivo with either pFSH, hLH, bGH, hPRL or with saline. IGF-I mRNA expression was found in both Sertoli and Leydig cells after treatment with either FSH or LH. IGF-I mRNA was highly expressed in germ cells after FSH stimulation and to a lesser extent after GH or LH treatments. However, its expression was very low in hypophysectomized control or PRL treated rats. IGF-I mRNA was also expressed in stromal cells of epididymis after LH treatment and to a lesser extent after GH stimulation. In contrast, IGF-II mRNA expression was detected in all testicular cell types whatever the hormonal treatment (FSH, LH, GH, PRL). For each hormonal treatment testicular sections were examined after immunohistochemical staining with specific antisera against IGF-I and IGF-II. Both in situ hybridization and immunohistochemical data were examined in order to determine the testicular sites of synthesis of IGF-I and IGF-II. [less ▲]

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See detailEngineering geological conditions in the central area of Shanghai
Schroeder, Christian ULg; Dassargues, Alain ULg; Li, Xiang Lin

in Bulletin of Engineering Geology & the Environment (1992), 46

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See detailATOX - The ESTEC Atomic Oxygen Simulation Facility
Barbier, Christian ULg; Flebus, Carlo; Van Eesbeek, Marc

in Preparing for the Future (1992), 2

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See detailJalons pour une didactique universitaire
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Géographique de Liège (1992), (28), 103-110

To be a University lecturer is not only to contribute to create and to spread a knowledge, but also consists in forming others with this knowledge. Unfortunately, here, empiricism is a king and ... [more ▼]

To be a University lecturer is not only to contribute to create and to spread a knowledge, but also consists in forming others with this knowledge. Unfortunately, here, empiricism is a king and investigations in educational methods at a university level are rare. Therefore, in this article we attempt to explore the problem where it concerns geography through the four big investigative fieldsod didactics : objectives, contents, methods and techniques of education and appraisal of acquired knowledge and abilities. [less ▲]

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See detailThe place of GnRH agonists in the treatment of endometriosis and fibroids by advanced endoscopic techniques.
Donnez, Jacques; NISOLLE, Michelle ULg; Grandjean, Pascale et al

in British Journal of Obstetrics & Gynaecology (1992), 99(Suppl 7), 31-3

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See detailDes angiopathies non athéromateuses
Limet, Raymond ULg; VAN DAMME, Hendrik ULg

in Revue Médicale de Liège (1992), 47(11), 545-53

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See detailJournal de la réception d'un chanoine de Saint-Martin de Liège par le noble chapitre de Saint-Martin de Tours
George, Philippe ULg

in Bulletin de la Société Archéologique de Touraine (1992), XLIII

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See detailThe use of bituminous concrete reinforced by fibres for road surfaces
Courard, Luc ULg; Rigo, Jean-Marie ULg

in Studia Geotechnica et Mechanica (1992), XV(3-4), 31-48

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See detailLes cellules enterochromaffin-like (ECL) : de la physiologie à la pathologie
Belaiche, Jacques ULg; Delwaide, Jean ULg; Louis, Edouard ULg et al

in Médecine et Hygiène (1992), 50

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See detailFibromuscular dysplasia of the external iliac artery. A case report.
ADANT, JEAN-PHILIPPE; SAKALIHASAN, Natzi ULg; Dekoster, Guy ULg et al

in Vascular Surgery (1992), 26

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See detailMetabolic and respiratory changes after cholecystectomy performed via laparotomy or laparoscopy.
Joris, Jean ULg; Cigarini, I.; Legrand, Marc ULg et al

in British Journal of Anaesthesia (1992), 69(4), 341-5

We have compared metabolic and respiratory changes after laparoscopic cholecystectomy (n = 15) with those after open cholecystectomy (n = 15). The durations of postoperative i.v. therapy, fasting and ... [more ▼]

We have compared metabolic and respiratory changes after laparoscopic cholecystectomy (n = 15) with those after open cholecystectomy (n = 15). The durations of postoperative i.v. therapy, fasting and hospital stay were significantly shorter in the laparoscopy group. During the first and second days after operation, analgesic consumption but not pain scores (visual analogue scale) were significantly smaller after laparoscopy, while vital capacity, forced expiratory volume in 1 s, and PaO2 were significantly greater. The metabolic and acute phase responses (glucose, leucocytosis, C-reactive protein) were less after laparoscopy compared with laparotomy. Although plasma cortisol and catecholamine concentrations were not significantly different between the two groups, after surgery interleukin-6 concentrations were less in the laparoscopy group. [less ▲]

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See detailSquatting to standing: an unusual but powerful postural manoeuvre to investigate human arterial blood pressure regulation
Pochet, T. F. J.; Gérard, Paul; Fossion, Anny et al

in Archives of Physiology & Biochemistry (1992), 100(5), 31-51

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See detailAutomatic adaptive remeshing for numerical simulations of metalforming
Dyduch, M.; Habraken, Anne ULg; Cescotto, Serge ULg

in Computer Methods in Applied Mechanics & Engineering (1992), 101

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See detailUne question de génétique : wallon "tchawe-sori" et français "chauve-souris"
Boutier, Marie-Guy ULg

in Travaux de linguistique et de philologie (1992), 30

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See detailLes bactéries lactiques, une aide alimentaire.
Thonart, Philippe ULg; Roblain, D.

in Mellitus Magazine (1992), 3

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See detailVers un apprentissage semi-autonome en français langue de spécialité (seconde partie)
Vanden Berghe, Kristine ULg; Slootmaekers, An; Sanctobin, Véronique et al

in Romaneske (1992), 17(3), 53-62

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See detailEndotoxin-induced microvascular injury in isolated and perfused pig lungs
Urbain, B.; Gustin, Pascal ULg; Ansay, Michel ULg

in Veterinary Research Communications (1992), 16(6), 453-464

The lungs of 13 healthy Landrace piglets were isolated, perfused and maintained in an isogravimetric state under zone III conditions. By applying vascular occlusion methods, the total blood flow ... [more ▼]

The lungs of 13 healthy Landrace piglets were isolated, perfused and maintained in an isogravimetric state under zone III conditions. By applying vascular occlusion methods, the total blood flow resistance (Rt) was partitioned into four components: arterial (Ra), pre- (Ra') and post-capillary (Rv'), and venous (Rv). The capillary filtration coefficient (Kfc) was evaluated using a gravimetric technique. A bolus of 55 micrograms of Escherichia coli endotoxins (LPS) per 100 g of lung was injected into the arterial reservoir of eight lungs, followed by an infusion of LPS at a rate of 55 micrograms per 100 g of lung per hour for 180 min. A bolus of theophylline (85 mg per 100 g of lung weight) was injected into the arterial reservoir after the last determination of the Kfc value. All the parameters were evaluated again when the lungs reached a new steady state. Endotoxin induced a significant increase in Rt from 54.7 +/- 7.0 at zero time to 184.7 +/- 44.2 cmH2O min L-1 (100 g)-1 180 minutes later, which can be ascribed to the increase in Ra' and Rv'. These haemodynamic modifications were related to the increases in the arterial pressure and in the pressure at the distal end of the arterial segment and to the decreases in the pressure at the proximal end of the venous segment and in the blood flow. The capillary pressure and the lung weight remained unchanged. Endotoxin infusion induced an increase in the Kfc value from 0.208 +/- 0.011 (at t = 0) to 0.391 +/- 0.034 ml min-1 (cmH2O)-1 (100 g)-1 (at t = 180). Administration of theophylline significantly reduced Rt,Ra,Ra' and Rv' towards or under the baseline values and also induced a significant increase in the lung weight and in the Kfc value. It was concluded that the endotoxin-induced increase in the total blood flow resistance can be ascribed to a vasospasm occurring at the level of the pre- and post-capillary small vessels and that changes in the permeability of the endothelium greatly contribute to the development of the pulmonary oedema observed in endotoxaemic pigs [less ▲]

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See detailHuman growth hormone: complementary DNA cloning and expression in bacteria. 1979
Martial, Joseph ULg; Hallewell, R. A.; Baxter, J. D. et al

in Biotechnology (Reading, Mass.) (1992), 24

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See detailModel of the algerian currents instability
Beckers, Jean-Marie ULg; Nihoul, Jacques ULg

in Journal of Marine Systems (1992), 3(4-5), 441-451

A preliminary ''small-perturbation'' analytical study of a non-dissipative idealized model of the Algerian Current is made, with the aim of identifying major characteristic scales and investigating the ... [more ▼]

A preliminary ''small-perturbation'' analytical study of a non-dissipative idealized model of the Algerian Current is made, with the aim of identifying major characteristic scales and investigating the reality of possible classical instability mechanisms. The simple configuration is shown to be stable, from a linear perturbation point of view. The GHER 3D Primitive Equation Model is then applied to a more realistic investigation of the Algerian Current. The GHER model is non-linear, three-dimensional, with turbulent closure, mode splitting and a sigma-Coordinate formulation. The numerical simulation shows the development and mature pattern of the instability in excellent agreement with the observations. The relative importance of the existence of a coastal boundary layer, the nature of the initial perturbation, baroclinic and non-linear effects on the instability mechanism is discussed. [less ▲]

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See detailL’an un du décret de l’Aide à la jeunesse
Glowacz, Fabienne ULg; Born, Michel ULg

in Revue d’Action Sociale (1992)

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See detailPRELIMINARY-RESULTS OF 3-D BAROCLINIC NUMERICAL-MODELS OF THE MESOSCALE AND MACROSCALE CIRCULATIONS ON THE NORTH-WESTERN EUROPEAN CONTINENTAL-SHELF
Delhez, Eric ULg; Martin, Géraldine ULg

in Journal of Marine Systems (1992), 3(4-5), 423-440

Two mathematical models for the study of mesoscale (tides, storm surges ...) and macroscale (general circulation ...) motions are described. Both models are derived from the GHER 3-D baroclinic turbulent ... [more ▼]

Two mathematical models for the study of mesoscale (tides, storm surges ...) and macroscale (general circulation ...) motions are described. Both models are derived from the GHER 3-D baroclinic turbulent closure primitive equation model and adapted to the specific spectral windows of, respectively, mesoscale and macroscale processes. Numerical methods are discussed: 3-D finite differences, mode-splitting, sigma-transform ... The mesoscale model is applied to the simulation of the M2 tide on the North-Western European Continental Shelf. The residual circulation model is based on time averaged primitive equations which explicitly include mesoscale Reynolds stresses that are computed by the mesoscale model. Preliminary results of the application of this model in typical summer conditions are presented. [less ▲]

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See detailEthique et politique des "sauvages". Lévi-Strauss, Clastres, La Boétie
Delruelle, Edouard ULg

in Cahiers de Clio (1992), 111-112

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See detailLa problematique des separateurs de graisse.
Ansenne, A.; Destain, Jacqueline ULg; Godefroid, J. et al

in Tribune de l'Eau (La) (1992), 45(558), 33-40

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See detailIntraoperative cytokines production during orthotopic liver transplantation
Pirenne, J.; Noizat-Pirenne, F.; De Groote, D. et al

in Transplant International : Official Journal of the European Society for Organ Transplantation (1992), 5(Suppl 1), 631-635

In summary, we established that a significant production of the monokines interleukin-6, tumor necrosis factor apha, and interleukin-1 occurred during orthotopic liver transplantation whereas the ... [more ▼]

In summary, we established that a significant production of the monokines interleukin-6, tumor necrosis factor apha, and interleukin-1 occurred during orthotopic liver transplantation whereas the lymphokines interferon gamma and interleukin-2 were not detected. Levels of interleukin-6 reached their maximum values before and especially at the end of the anhepatic phase. They remained high after the anhepatic phase, i. e. after reperfusion of the new livers. Tumor necrosis factor alpha and interleukin-1 reached their maximum values after the anhepatic phase. Not only were interleukin-6, tumor necrosis factor alpha, and interleukin-1 present in the serum but they could also be detected in the bile produced by these new livers. Mechanisms of monokine production during orthotopic liver transplantation is multifactorial in origin and further studies will have to evaluate the relative contribution of the various factors involved. The possibility of an association between peroperative monokines and transplant outcome and their potential clinical implication will have to be elucidated. [less ▲]

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See detailModélisation mathématique des aquifères
Dassargues, Alain ULg; Monjoie, Albéric ULg

in Bulletin d'Information de l'ANSEAU (1992)

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See detailNouvelles approches pharmacologiques basées sur les interactions neuro-endocrino-immunitaires
Gueenen, V.; Franchimont, N.; Louis, Edouard ULg et al

in Médecine et Hygiène (1992), 50

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See detailBiochemical, genetic and molecular characterization of new respiratory-deficient mutants in Chlamydomonas reinhardtii.
Dorthu, M.-P.; Remy, S.; Michel-Wolwertz, M.-R. et al

in Plant Molecular Biology (1992), 18

Eight respiratory-deficient mutants of Chlamydomonas reinhardtii have been isolated after mutagenic treatment with acriflavine or ethidium bromide. They are characterized by their inability to grow or ... [more ▼]

Eight respiratory-deficient mutants of Chlamydomonas reinhardtii have been isolated after mutagenic treatment with acriflavine or ethidium bromide. They are characterized by their inability to grow or their very reduced growth under heterotrophic conditions. One mutation (Class III) is of nuclear origin whereas the seven remaining mutants (Classes I and II) display a predominantly paternal mt- inheritance, typical of mutations residing in the mitochondrial DNA. Biochemical analysis has shown that all mutants are deficient in the cyanide-sensitive cytochrome pathway of the respiration whereas the alternative pathway is still functional. Measurements of complexes II + III (antimycin-sensitive succinate-cytochrome c oxido-reductase) and complex IV (cytochrome c oxidase) activities allowed to conclude that six mutations have to be localized in the mitochondrial apocytochrome b (COB) gene, one in the mitochondrial cytochrome oxidase subunit I (COI) gene and one in a nuclear gene encoding a component of the cytochrome oxidase complex. By using specific probes, we have moreover demonstrated that five mutants (Class II mutants) contain mitochondrial DNA molecules deleted in the terminal end containing the COB gene and the telomeric region; they also possess dimeric molecules resulting from end-to-end junctions of deleted monomers. The two other mitochondrial mutants (Class I) have no detectable gross alteration. Class I and Class II mutants can also be distinguished by the pattern of transmission of the mutation in crosses. An in vivo staining test has been developed to identify rapidly the mutants impaired in cyanide-sensitive respiration. [less ▲]

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See detailELISA test, a new method to detect and quantify isoproturon in soil.
Liegeois, Eric; Dehon, Yves; De Brabant, Bernard et al

in Science of the Total Environment (1992), 123/124

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See detailFailure of Buserelin-Induced Medical Castration to Control Pulmonary Lymphangiomyomatosis in Two Patients
RADERMECKER, Marc ULg; Broux, R.; Corhay, Jean-Louis ULg et al

in CHEST (1992), 101(6), 1724-6

Two women, aged 44 and 29 years, respectively, were admitted to the hospital in early 1987 for recurrent pneumothorax, dyspnea and a diffuse reticulonodular pattern evidenced on the chest x-ray film. Lung ... [more ▼]

Two women, aged 44 and 29 years, respectively, were admitted to the hospital in early 1987 for recurrent pneumothorax, dyspnea and a diffuse reticulonodular pattern evidenced on the chest x-ray film. Lung biopsy confirmed LAM in both patients. Both were treated sequentially with medroxyprogesterone and a LHRH agonist (buserelin) to achieve reversible medical castration. Neither subjective nor objective improvement was noted after 13 and 5 months, respectively, of buserelin therapy (900 micrograms/day, nasal spray) despite an effective suppression of the pituitary-gonadal axis. Medroxyprogesterone also was ineffective. Buserelin thus failed to control pulmonary LAM in these two patients, in spite of effective medical castration. [less ▲]

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See detailUn index sélectif d’un texte philosophique. Husserl, Die Idee der Phänomenologie
Evrard, Etienne ULg; Purnelle, Gérald ULg

in Revue. Informatique et Statistique dans les Sciences Humaines (1992)

To assist the content analysis of a philosophical text, we have created a method of constituting both a selective index reduced to philosophically significant words and several frequency lists. We have ... [more ▼]

To assist the content analysis of a philosophical text, we have created a method of constituting both a selective index reduced to philosophically significant words and several frequency lists. We have applied this method to Die Idee der Phenomenologie where Husserl explains for the first time his theory of the phenomenological reduction and of the constitution of the objects in the conscience. The results proved to be valuable for the philosophical interpretation. [less ▲]

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See detailEtude de l'antibiorésistance de Clostridium perfringens par l'emploi de sondes génétiques.
Daube, Georges ULg; Mainil, Jacques ULg; Limbourg, Bernard et al

in Annales de Médecine Vétérinaire (1992), 136

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See detailEditorial : la médecine comportementale : vingt ans après!
Fontaine, Ovide ULg; Etienne, Anne-Marie ULg

in Journal de Thérapie Comportementale et Cognitive (1992), 2(3), 2-3

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See detailThe 1985 chlorine and fluorine inventories in the stratosphere based on atmos observations at 30-degrees north latitude
Zander, Rodolphe ULg; Gunson, Michael R.; Farmer, Crofton B. et al

in Journal of Atmospheric Chemistry (1992), 15(2), 171-186

The set of high-resolution infrared solar observations made with the Atmospheric Trace Molecule Spectroscopy (ATMOS) - Fourier transform spectrometer from onboard Spacelab 3 (30 April-1 May 1985) has been ... [more ▼]

The set of high-resolution infrared solar observations made with the Atmospheric Trace Molecule Spectroscopy (ATMOS) - Fourier transform spectrometer from onboard Spacelab 3 (30 April-1 May 1985) has been used to evaluate the total budgets of the odd chlorine and fluorine chemical families in the stratosphere. These budgets are based on volume mixing ratio profiles measured for HCl, HF, CH3Cl, ClONO2, CCl4, CCl2F2, CCl3F, CHClF2, CF4, COF2, and SF6, near 30-degrees north latitude. When including realistic concentrations for species not measured by ATMOS, i.e., the source gases CH3CCl3, and C2F3Cl3 below 25 km, and the reservoirs ClO, HOCl and COFCl between 15 and 40 km (five gases actually measured by other techniques), the 30-degrees-N zonal 1985 mean total mixing ratio of chlorine, Cl, was found to be equal to (2.58 +/- 0.10) ppbv (parts per billion by volume) throughout the stratosphere, with no significant decrease near the stratopause. The results for total fluorine indicate a slight, but steady, decrease of its volume mixing ratio with increasing altitude, around a mean stratospheric value of (1.15 +/- 0.12) ppbv. Both uncertainties correspond to one standard deviation. These mean springtime 1985 stratospheric budgets are commensurate with values reported for the tropospheric Cl and F concentrations in the early 1980s, when allowance is made for the growth rates of their source gases at the ground and the time required for tropospheric air to be transported into the stratosphere. The results are discussed with emphasis on conservation of fluorine and chlorine and the partitioning among source, sink, and reservoir gases throughout the stratosphere. [less ▲]

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See detailLa pessière wallonne: son évolution entre 1980 et 1990.
Lecomte, H.; Rondeux, Jacques ULg; Hebert, Jacques ULg

in Silva Belgica (1992), 99(4), 7-14

Au début des années 1980, un inventaire des forêts wallonnes a été réalisé en vue de dresser rapidement, par échantillonnage systématique, un état aussi objectif que possible des ressources ligneuses ... [more ▼]

Au début des années 1980, un inventaire des forêts wallonnes a été réalisé en vue de dresser rapidement, par échantillonnage systématique, un état aussi objectif que possible des ressources ligneuses régionales, principalement en termes de surfaces et de volumes sur pied. En 1990, en vue d’actualiser les données, un nouvel inventaire a été effectué sur un sous-échantillon du précédent. La présente étude fournit, dans une large mesure, une mise à jour des données relatives aux peuplements d’épicéa commun (Picea abies (L.) KARST) et publiées dans un document intitulé « La pessière wallonne en chiffres » (RONDEUX et al., 1984b). Elle devrait aussi permettre de construire un modèle mathématique de prévision de la production d’épicéa pour les années à venir. Dans les lignes qui suivent, après avoir justifié le bien-fondé de pareille étude (paragraphe 2), nous décrirons la méthode d’analyse que nous avons utilisée (paragraphe 3). Nous présenterons ensuite les principaux résultats obtenus (paragraphe 4). Nous terminerons par quelques considérations relatives à la situation actuelle des pessières concernées ainsi qu’aux principales raisons qui la sous-tendent (paragraphe 5). [less ▲]

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See detailLa Federation des Banques de Donnees Biogeographiques (FBDB).
Dufrêne, Marc ULg; Lebrun, Philippe; Rasmont, P.

in Mémoires de la Société Royale d'Entomologie de Belgique (1992), 35

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See detailTranscriptional regulation by triiodothyronine requires synergistic action of the thyroid receptor with another trans-acting factor
Voz, Marianne ULg; Peers, Bernard ULg; Wiedig, Murielle J et al

in Molecular & Cellular Biology (1992), 12(9), 3991-7

Human placental lactogen B (hCS-B) promoter activity is strongly stimulated by triiodothyronine (T3) in pituitary GC cells through interaction between the thyroid receptor and a thyroid receptor-binding ... [more ▼]

Human placental lactogen B (hCS-B) promoter activity is strongly stimulated by triiodothyronine (T3) in pituitary GC cells through interaction between the thyroid receptor and a thyroid receptor-binding element (TBE) spanning coordinates -67 to -41. This TBE is adjacent to the binding site for pituitary factor GHF1 (-95 to -68) which seems necessary for T3 stimulation of hCS-B promoter activity (M. L. Voz, B. Peers, A. Belayew, and J. A. Martial, J. Biol. Chem. 266:13397-13404, 1991). We here demonstrate actual synergy between the thyroid receptor and GHF1. Indeed, in placental JEG-3 cells devoid of factor GHF1, hCS promoter activity is barely stimulated by T3, while a strong response is observed in pituitary GC cells. In the latter, furthermore, neither the TBE nor the GHF1-binding site alone is sufficient to render the thymidine kinase promoter responsive to T3, while in combination they promote strong T3 stimulation. Close proximity between these sites is required for optimal synergy: T3 stimulation globally decreases with increased spacing. Furthermore, synergy occurs not only with a GHF1-binding site but also with all other factor recognition sequences tested (Sp1, NF1, CP1, Oct1, and CACCC boxes) and even with two other copies of the TBE. Nor is it specific to hCS TBE, since the palindromic sequence TCAGGTCA TGACCTGA (TREpal) also exhibits cooperativity. [less ▲]

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See detailBase de calcul pour le dimensionnement d'une tour de refroidissement à tirage naturel
Nicolas, Jacques ULg; Vasel, Jean-Luc ULg

in European Journal of Mechanical and Environmental Engineering (1992), 37

Le but de cet article est de fournir de façon exhaustive l'ensemble des relations qui permettent le calcul des transferts thermiques dans une tour de refroidissemenmt à contrecourant et à tirage naturel ... [more ▼]

Le but de cet article est de fournir de façon exhaustive l'ensemble des relations qui permettent le calcul des transferts thermiques dans une tour de refroidissemenmt à contrecourant et à tirage naturel. L'article se base sur les approches classiques décrites dans la littérature (Merkel, Chilton, Braun, ...), mais en uniformisant les symboles et les unités, de façon à fournir en un seul texte tous les éléments qui permettent de modéliser, pour des besoins de contrôle ou de dimensionnement, une tour de refroidissement et d'en estimer les performances.Quelques pratiques d'utilisation de ces relations sont étudiées, ainsi qu'une confrontation de différentes méthodes de résolution sur un même exemple. [less ▲]

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See detailHervé Guibert (1955-1991)
Badir, Sémir ULg; Demoulin, Laurent ULg; Louis, Vincent

in Ecritures (1992), 2

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See detailRéCoDA, un réseau de bibliothèques.
Pochet, Bernard ULg

in Cahiers de la Documentation = Bladen voor Documentatie (1992), 46(4), 184-185

Cet article présente le réseau RéCoDA. Le réseau RéCoDA est un réseau coopératif de bibliothèques (établissements d'enseignement secondaire et supérieur en Communauté française de Belgique) et d ... [more ▼]

Cet article présente le réseau RéCoDA. Le réseau RéCoDA est un réseau coopératif de bibliothèques (établissements d'enseignement secondaire et supérieur en Communauté française de Belgique) et d'utilisateurs (étudiants, enseignants et bibliothécaires) crée en avril 1991. Le Centre serveur du réseau, situé à Gembloux, réalise la réunion des catalogues informatisés des bibliothèques coopérantes. Ce catalogue commun est accessible par Internet. Tous les documents signalés se trouvent dans au moins une des bibliothèques coopérantes et peuvent être consultés sur place ou expédiés par le prêt inter-bibliothèques. Cette accessibilité des documents fait de RéCoDA une bibliothèque virtuelle présente chez tous ses utilisateurs. Ses objectifs sont d'améliorer l'utilisation des bibliothèques existantes en les ouvrant aux utilisateurs de toutes les écoles, de permettre une didactique liée à la prise d'information tant pour les enseignants que pour les étudiants et de promouvoir par la pratique un esprit coopératif de partage de l'information. [less ▲]

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See detailImportance et dynamique du complexe parasitaire du cotonnier dans la région de Gandajika au Zaïre
Delhove, G.; Mergeai, Guy ULg; Mulamba, K.

in Mémoires de la Société Royale d'Entomologie de Belgique (1992), (35), 379-387

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See detailAlpha-Cheratte: construire ensemble une interculture
Mouvet, Bernadette ULg; Manço, Altay ULg

in Recherche en Education (1992), 8

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See detailCompréhension et production des prépositions spatiales topologiques et projectives chez les sujets handicapés mentaux modérés
Fayasse, M.; Comblain, Annick ULg; Rondal, Jean-Adolphe ULg

in Revue Francophone de Déficience Mentale (1992), 3(2), 91-116

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See detailLes activités physiques et parascolaires. Analyse des possibilités d'application
Delfosse, Catherine; Cloes, Marc ULg; Piéron, Maurice

in Sport (1992), 139

Cette étude faisait partie d'un programme visant l'organisation d'activités physiques et sportive dans le cadre parascolaire pour les enfants fréquentant les classes de 3ème et 4ème années des écoles ... [more ▼]

Cette étude faisait partie d'un programme visant l'organisation d'activités physiques et sportive dans le cadre parascolaire pour les enfants fréquentant les classes de 3ème et 4ème années des écoles primaires de Fléron (région liégeoise). Ses objectifs étaient les suivants: (1) contrôler l'effet de la participation des enfants sur leur aptitude physique générale, sur leurs comportements moteurs spécifiques au contenu des activités et sur divers comportements moteurs sociaux; (2) identifier les facteurs influençant la participation au programme ou son abandon; (3) analyser les possibilités d'application de ce type d'action en vue de favoriser la pratique des activités physiques et sportives dans le cadre parascolaire. [less ▲]

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See detailEtude de l'efficacité de matières actives insecticides à l'égard des principaux parasites du cotonnier au sud du Zaïre
Delhove, G.; Mergeai, Guy ULg; Mulamba, K.

in Mémoires de la Société Royale d'Entomologie de Belgique (1992), (35), 389-395

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See detailLymphocyte activation and the family of NF-kappa B transcription factor complexes.
Bours, Vincent ULg; Franzoso, G.; Brown, K. et al

in Current Topics in Microbiology and Immunology (1992), 182

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See detailRespiratory problems and performance in growing-fattening bulls
Korsak Koulagenko, Nicolas ULg; Istasse, Louis ULg; Baldwin, Paule ULg et al

in Animal Production (1992), 56

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See detailLes friches industrielles
Merenne-Schoumaker, Bernadette ULg; Bruyelle, P.; Kivell, P. T.

in Revue Belge de Géographie (1992), (50), 113-137

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See detailDensitometric Evaluation of Spiraeoside after Derivatization in Flowers of Filipendula Ulmaria (L.) Maxim
Poukens-Renwart, P.; Tits, Monique ULg; Wauters, Jean-Noël ULg et al

in Journal of Pharmaceutical & Biomedical Analysis (1992), 10(10-12, Oct-Dec), 1085-8

Spiraeoside (quercetin-4'-glucoside) is the major and most caharacteristic flavonoid of Filipendula ulmaria flowers and is not found in the leaves and stems. This paper describes a quantification of ... [more ▼]

Spiraeoside (quercetin-4'-glucoside) is the major and most caharacteristic flavonoid of Filipendula ulmaria flowers and is not found in the leaves and stems. This paper describes a quantification of spiraeoside by HPTLC densitometry after derivatization with diphenylboric acid -2-aminoester. The fluorescence of this flavonoid was measured at 330 nm. the spiraeoside content in batches of Filipendula ulmaria flowers ranged from 3 to 4.3 %. It is of note that these results are similar to those published elsewhere after HPLC analysis of other batches. [less ▲]

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See detailReplicon typing of virulence plasmids of enterotoxigenic Escherichia coli isolates from cattle
Mainil, Jacques ULg; Bex, F.; Dreze, P. et al

in Infection and Immunity (1992), 60

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See detailObservations sur l'utilisation de traitements gonadotropes répétés chez la chèvre laitière
Baril, Gérard; Remy, Benoît ULg; Vallet, J. C. et al

in Annales de Zootechnie (1992), 41(3-4), 291-296

Observations on the repeated use of gonadotropin treatments in the dairy goat. Our studies have attempted to determine if the absence of oestrus observed in some goats after fluorogestone acetate-pregnant ... [more ▼]

Observations on the repeated use of gonadotropin treatments in the dairy goat. Our studies have attempted to determine if the absence of oestrus observed in some goats after fluorogestone acetate-pregnant mare serum gonadotropin (FGA-PMSG) treatments could be due to its repeated use. An experiment was carried out in a Saanen flock, in which she-goats were submitted to FGA-PMSG treatment each year. The first treatment of the year was performed on 169 shegoats between March and August 1989. Of the females diagnosed as non-pregnant following the first treatment, 38 were treated a second time during the same period. The proportion of females which went into oestrus after the first treatment was lower in 59 multiparous goats than in 64 nulliparous and in 46 primiparous goats (64.4 vs 100 and 97.8%; P < O.Oi). For the she-goats treated twice, the percentage of females which went into oestrus after the second treatment was lower than that observed after the first treatment (44.7 vs 71.0%; P < 0.05). The presence of anti-PMSG antibodies in plasma was investigated in blood samples taken before and after each treatment. Results are expressed as % of radioactive PMSG bound by 10 pl of blood plasma. Before the first treatment, the percentage of bound PMSG was higher in multiparous than in nulliparous and primiparous goats (17.5 t 23.1 vs -0.06 t 0.7 ; 1.2 ± 1.9 ; P < 0.01), and increased after treatment for all parities. In goats treated twice, the percentage of bound PMSG before the second treatment was higher than that observed before first treatment (22.8 t 23. vs 11.2 f 19.7; P < 0.05). For both treatments, females which did not come into oestrus showed a percentage of bound PMSG which was significantly higher than that of goats in which oestrus was observed (multiparous first treatment: 30.5 f 23.6 vs 1I 2. 9 20. 1 %; she-goats in second treatment: 33.9 ± 23.1 vs 9.2 ± 14.5T.). When the percentage of bound PMSG before treatment was low (< 5°l) in multiparous goats, the oestrus and kidding rates after the first treatment did not differ from those observed in nulliparous and primiparous goats. The decrease in the efficiency of the treatments was therefore not due to the age of animals. The repeated use of FGA-PMSG during the lifetime of goats or within the same year is followed by an increase in the levels of antibodies against PMSG. The presence of those antibodies may explain the decrease in the efficiency of these treatments in inducing and synchronizing oestrus. [less ▲]

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See detailExplosion bibliographique, implosion des bibliothèques et des systèmes documentaires
Denooz, Joseph ULg

in JBDJ Newsletter (Association belge des Bibliothécaires et des Documentalistes Juridiques) (1992), numéro spécial

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See detailFumure azotée : Effet d'un sous-semis sur une culture de maïs
Tychon, Bernard ULg; Capellen, O.; Foucart, G. et al

in Revue de l’Agriculture = Landbouwtijdschrift (1992), 45(2),

La superficie occupée par la culture de maïs en Lorraine belge n'a cessé d'augmenter depuis le début des années 70. Comme toutes les têtes de rotation, le maïs reçoit d'importantes quantités de fumier et ... [more ▼]

La superficie occupée par la culture de maïs en Lorraine belge n'a cessé d'augmenter depuis le début des années 70. Comme toutes les têtes de rotation, le maïs reçoit d'importantes quantités de fumier et de lisier. Ces concentrations élevées en matières organiques associées aux engrais minéraux sont très souvent à l'origine d'un bilan azoté déséquilibré. Dans ces conditions, les reliquats en azote généralement observés dans le sol au moment de la récolte constituent un danger réel pour la qualité des nappes phréatiques. Dans cet article, nous étudions un sous-semis de ray-grass (Lolium perenne L.). Le suivi concerne d'abord la compétition entre la culture de maïs et le sous-semis. Pour les conditions pédoclimatiques de l'essai, le sous-semis n'a pas concurrencé le maïs. L'étude porte ensuite sur l'efficacité de la technique comme moyen de lutte antipollution. Les différents profils de sol prélevés ont clairement montré l'effet d'un sous-semis, effet beaucoup plus marqué sur un limon sableux que sur un sable limoneux. [less ▲]

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See detailThe formation and enzymatic repair of DNA modifications caused by haloethylnitrosoureas and related compounds
Ludlum, D.; Habraken, Yvette ULg; Carter, C. et al

in Nucleic Acids Symposium Series (1992), 105

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See detailPathologie du béton: précipitations secondaires
Darimont, Anne ULg

in Revue belge de Microscopie électronique (1992)

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See detailInheritance and wealth composition
Pestieau, Pierre ULg; Perelman, Sergio ULg

in Journal of Population Economics (1992), (5), 305-318

This paper studies the effects of variables pertaining to alternative bequest motives on the composition of households' portofolio. It relies on a 1986 survey on the assets structure of 5600 French ... [more ▼]

This paper studies the effects of variables pertaining to alternative bequest motives on the composition of households' portofolio. It relies on a 1986 survey on the assets structure of 5600 French households. The main conclusion is that bequest motives indeed influence the composition of households' wealth. However, available data does not allow one to sort out the influence of specific models of inheritance. [less ▲]

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See detailFusogenic Segments Of Bovine Leukemia-Virus And Simian Immunodeficiency Virus Are Interchangeable And Mediate Fusion By Means Of Oblique Insertion In The Lipid Bilayer Of Their Target-Cells
Voneche, V.; Portetelle, Daniel ULg; Kettmann, Richard ULg et al

in Proceedings of the National Academy of Sciences of the United States of America (1992), 89(9),

Modified bovine leukemia virus (BLV) glycoproteins were expressed by using vaccinia virus recombinants, and their fusogenic capacities were examined by a syncytia-formation assay. This analysis indicates ... [more ▼]

Modified bovine leukemia virus (BLV) glycoproteins were expressed by using vaccinia virus recombinants, and their fusogenic capacities were examined by a syncytia-formation assay. This analysis indicates that (i) both BLV envelope glycoproteins gp51 and gp30 are necessary for cell fusion; (ii) insertion of the N-terminal segment of gp30 (fusion peptide) into the lipid bilayer in an oblique orientation, as predicted by computer conformational analysis, results in fusogenic capacities higher than insertion in a perpendicular or parallel orientation; and (iii) replacement of the BLV fusion peptide with its simian immunodeficiency virus counterpart does not modify the fusogenic capacity of the BLV glycoprotein. [less ▲]

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See detailA fully coupled elastoplastic damage modeling and fracture criteria in metalforming processes
Zhu, Y. Y.; Cescotto, Serge ULg; Habraken, Anne ULg

in Journal of Materials Processing Technology (1992), 32

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See detailFacteurs de virulence et phénotypes de soixante et une souches d'Escherichia coli d'origine bovine, productrices de la toxine cytotoxique nécrosante de type 1 (CNF 1).
Pohl, P.; Daube, Georges ULg; Mainil, Jacques ULg et al

in Annales de Recherches Vétérinaires = Annals of Veterinary Research (1992), 23(1), 83-91

Virulence factors and phenotypes of 61 strains CNF1+ were investigated. Eighty-nine percent of the strains produced an aerobactin and were resistant to the bactericidal activity of sheep serum, both of ... [more ▼]

Virulence factors and phenotypes of 61 strains CNF1+ were investigated. Eighty-nine percent of the strains produced an aerobactin and were resistant to the bactericidal activity of sheep serum, both of which are properties of septicemic strains of E coli. None of the strains reacted either with DNA probes corresponding to the enterotoxins STaP, STb, LT-I and LT-IIa, or to the verotoxins VT-I and VT-II. None produced the adhesins K99, Att25 (FY or F17) and Att111. The great majority (93.4%) of the CNF1+E coli possessed both properties. These properties allow CNF1+ to be distinguished from CNF-E coli. [less ▲]

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See detailUltrastructural detection of DNA within the nucleolus by sensitive molecular immunocytochemistry.
Thiry, Marc ULg

in Experimental Cell Research (1992), 200(1), 135-44

This paper describes a new technique for locating DNA on semithin or ultrathin sections of aldehyde-fixed and plastic-embedded cells or tissues. Sections were incubated in a medium containing ... [more ▼]

This paper describes a new technique for locating DNA on semithin or ultrathin sections of aldehyde-fixed and plastic-embedded cells or tissues. Sections were incubated in a medium containing bromodeoxyuridine (BUdR) triphosphate and terminal deoxynucleotidyltransferase. The labeled nucleotides bound at the surface of the sections were subsequently detected with an anti-BUdR antibody and immunoglobulin-gold complex. On semithin sections, labeled nucleotide detection was achieved by an amplification step with silver enhancement. This technique was applied to a wide variety of biological materials allowing a sensitive detection of DNA-containing structures, even where these are present in very low amounts. Examples of high resolution and sensitive detection include the DNA present in mitochondria, chloroplasts, mycoplasmas, and DNA viruses. Special attention focused on the location of DNA inside the nucleolus. In Ehrlich tumor cell nucleoli, DNA was detected in the fibrillar centers and not in the dense fibrillar component. Identical results were found in the nucleoli of other cell types. These results contradict earlier data but conform with other recent immunocytochemical observations concerning the correlation between structure and function in the nucleolus. This method provides a useful tool for investigations requiring highly precise correlations between a molecular function and a given ultrastructural morphology. [less ▲]

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See detailL'explication en Ethologie : quelques essais de modélisation - L'exemple des poissons.
Poncin, Pascal ULg; Ruwet, J. C.

in Probio revue (1992), 10(1-2), 71-82

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See detailSuicidal behavior and growth hormone response to apomorphine test.
Pitchot, William ULg; Hansenne, Michel ULg; Moreno, A. G. et al

in Biological Psychiatry (1992), 31(12), 1213-9

Several cerebrospinal fluid (CSF) studies have provided support for a possible role for the dopaminergic system as a biological correlate of suicidal behavior. Indeed, low CSF levels of the dopamine ... [more ▼]

Several cerebrospinal fluid (CSF) studies have provided support for a possible role for the dopaminergic system as a biological correlate of suicidal behavior. Indeed, low CSF levels of the dopamine metabolite homovanillic acid (HVA) have been described in depressed patients with a history of suicide attempts. In this study, we assessed the dopamine receptor sensitivity in relationship to suicidal behavior by measuring growth hormone (GH) response to apomorphine 0.5 mg subcutaneously (sc) in 15 DSM-III-R (APA 1987) major depressive inpatients with a history of suicide attempts, compared to age-matched and gender-matched major depressive inpatients without a history of suicide. Patients with a history of suicidal behavior exhibited a significantly lower GH response to apomorphine than patients who never attempted suicide (t = 3.60, df = 1.28, p = 0.0012). Therefore, these results suggest that a blunted GH response to apomorphine could represent a biological marker of suicidal behavior. [less ▲]

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See detailThe faint young sun climatic paradox: A simulation with an interactive seasonal climate-sea ice model
Gérard, Jean-Claude ULg; Hauglustaine, Didier A.; François, Louis ULg

in Global and Planetary Change (1992), 97(3), 133-150

A seasonal one-and-a-half-dimensional (1 1/2-D) energy-balance climate model including a detailed sea ice calculation and an interactive albedo formulation has been developed and is used to investigate ... [more ▼]

A seasonal one-and-a-half-dimensional (1 1/2-D) energy-balance climate model including a detailed sea ice calculation and an interactive albedo formulation has been developed and is used to investigate the faint young sun climatic paradox. This model is shown to reproduce the present climate and sea ice observations. In spite of its greater complexity, its behavior is globally similar to simple energy-balance models with highly parameterized ice-albedo feedback used in previous studies of this question. It is found that when the solar luminosity drops by more than about 5% below its present value, the ice albedo feedback causes a global irreversible glaciation. Several sensitivity experiments show that the value of the critical solar constant and associated global surface temperature are only little sensitive to the set of model parameters describing the ice and snow albedo and meridional heat transport. In contrast, the absence or polar location of the continental mass introduce a nearly 10% decrease of the critical luminosity. The minimum level of atmospheric CO2 needed to prevent a global glaciation through enhanced greenhouse warming is calculated as a function of the solar luminosity. A 30% drop in solar output requires a 2 x 10(4)-fold increase in atmospheric CO2, an unacceptably large value. However, in the absence of continents, a carbon dioxide partial pressure of 2000 times the present level is found to be sufficient to stabilize the climate. The effects of a reduced continental area, paleogeographic changes and higher CO2 greenhouse effect combine to ensure a larger stability of the non-frozen configuration. Their cumulated and interactive effects may be able to solve the young sun paradox. [less ▲]

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See detailCoupled thermo-mechanical-metallurgical analysis during the cooling of steel pieces
Habraken, Anne ULg; Bourdouxhe, M.

in European Journal of Mechanics A : Solids (1992), 11(3), 381-402

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See detailLigands and tracers for PET studies of the 5-HT system--current status.
Crouzel, C.; Guillaume, Marcel ULg; Barre, L. et al

in International Journal of Radiation Applications and Instrumentation. Part B : Nuclear Medicine and Biology (1992), 19(8), 857-70

The status of the radiochemical development and biological evaluation of radioligands and tracers for PET studies of the serotonergic system is reviewed, indicating those agents with present value and ... [more ▼]

The status of the radiochemical development and biological evaluation of radioligands and tracers for PET studies of the serotonergic system is reviewed, indicating those agents with present value and those with future potential. Practical recommendations are given for the preparation of two useful radioligands for PET studies of central 5-HT2 receptors, namely [18F]setoperone and [18F]altanserin. Though, it has not proved possible to recommend tracers or radioligands for the study of other aspects of serotonergic system, prospects for future radiochemical development are indicated, especially for developing radioligands for the 5-HT re-uptake site, and for the 5-HT1 and 5-HT3 receptors. [less ▲]

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See detailCan perturbative QCD predict a substantial part of diffractive LHC / SSC physics?
Cudell, Jean-René ULg; Margolis, B.

in Physics Letters B (1992), 297

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See detailLes communications intercellulaires au niveau des centres germinatifs.
Heinen, Ernst ULg

in Revue Médicale de Liège (1992), 47(3), 118-22

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See detailToxicité des herbicides chez les animaux domestiques
Delaunois, A.; Gustin, Pascal ULg; Ansay, M.

in Annales de Médecine Vétérinaire (1992), 136

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See detailWilson Harris's Carnival: Through and Beyond Demarcations
Pagnoulle, Christine ULg

in Journal of West Indian Literature (1992), 5(1-2), 75-84

There is something definitely messianic about Wilson Harris' fiction. The present article explores how transgressions of a number of conventions that are part of the 'tautology of power' function in his ... [more ▼]

There is something definitely messianic about Wilson Harris' fiction. The present article explores how transgressions of a number of conventions that are part of the 'tautology of power' function in his novel Carnival. [less ▲]

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See detailBilan de cinq années de détection des taurillons infectés de manière persistante par le virus BVD au centre de sélection bovine de Ciney
Waxweiler, S.; Karelle Bui-Thi, L.; Boulanger, D. et al

in Annales de Médecine Vétérinaire (1992), 136

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See detailDe l'histoire de l'art aux sciences de l'image et de l'objet
Duchesne, Jean-Patrick ULg

in Art&Fact (1992), 11

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See detailIdentification of Three-Element Windkessel Model: Comparison of Time and Frequency Domain Techniques
Pochet, T.; Gérard, Paul ULg; Marnette, J. M. et al

in Archives Internationales de Physiologie, de Biochimie et de Biophysique (1992), 100(3, May-Jun), 295-301

The problem of the parameter identification of the three-element windkessel model is studied. Minimization by least-square technique--LSQ--in time domain and frequential techniques--FFT--are compared ... [more ▼]

The problem of the parameter identification of the three-element windkessel model is studied. Minimization by least-square technique--LSQ--in time domain and frequential techniques--FFT--are compared. Continuous pressure and flow curves were recorded in the proximal aorta of an open chest dog. Comparison shows very high correlations between the parameter estimations obtained by LSQ and FFT methods. However, systematic differences appear between the calculated values, but do not seem to endanger physiological interpretation of the results. [less ▲]

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See detailGraphes arithmétiques
Pays, Isabelle ULg

in cahiers mathématiques 39 Montpellier (1992)

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See detailDISTINGUISHEDNESS OF WEIGHTED FRECHET SPACES OF CONTINUOUS-FUNCTIONS
Bastin, Françoise ULg

in Proceedings Of The Edinburgh Mathematical Society (1992), 35(Part 2), 271-283

In this paper, we prove that if U is an increasing sequence of strictly positive and continuous functions on a locally compact Hausdorff space X such that VBAR congruent-to VBAR and C(X), then the Frechet ... [more ▼]

In this paper, we prove that if U is an increasing sequence of strictly positive and continuous functions on a locally compact Hausdorff space X such that VBAR congruent-to VBAR and C(X), then the Frechet space CU(X) is distinguished if and only if it satisfies Heinrich's density condition, or equivalently, if and only if the sequence U satisfies condition (H) (cf. e.g.`[1] for the introduction of (H)). As a consequence, the bidual lambda(infinity)(A) of the distinguished Kothe echelon space lambda-0(A) is distinguished if and only if the space lambda-1(A) is distinguished. This gives counterexamples to a problem of Grothendieck in the context of Kothe echelon spaces. [less ▲]

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See detailEnergy hypersurface local properties of the O2HF-1 rearrangement
Dive, Georges ULg; Dehareng, Dominique ULg; Culot, Patrick et al

in Chemical Physics Letters (1992), 195(2-3), 189-193

This work analyses a case where Murrell's proposal, stating that a second-order point must lie above a first-order one, is apparently violated. Study at the SCF-UMP2 level within the D95 + + basis set, of ... [more ▼]

This work analyses a case where Murrell's proposal, stating that a second-order point must lie above a first-order one, is apparently violated. Study at the SCF-UMP2 level within the D95 + + basis set, of one critical point of the O2HF- anion, previously proposed to be of order two by Lopez, shows the importance of the electronic correlation. The critical point associated with the (2)PI first-order ones. The present analysis reveals that this contradistinction can be explained by three unconsidered elements: the local symmetry, the electronic correlation and the internal variables description. [less ▲]

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See detailDawsonites magnus sp. nov., une plante nouvelle du Dévonien inférieur d'Ensival (Belgique).
Gerrienne, Philippe ULg

in Comptes Rendus de l'Académie des Sciences. Série II. Mécanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre (1992), 315

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