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See detailVers une théorie générale du signe
Badir, Sémir ULg

in Degrés : Revue de Synthèses à Orientation Sémiologique (1994), 79-80

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See detailGrowth-inhibiting effects of a neem-based insecticide (Margosan-O) against Spodoptera littoralis (Lepidoptera: Noctuidae
Haubruge, Eric ULg; Seck, Dogo; Hemptinne, Jean-Louis et al

in Insect Science and its application (1994), 15(4), 243-249

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See detailRecension de l'ouvrage de Silvano Petrosino, "Jacques Derrida et la loi du possible"
Steinmetz, Rudy ULg

in Cahiers Internationaux de Symbolisme (1994)

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See detailSpatial patterns of phytoplanktonic pigments and primary production in a semi-enclosed periantarctic ecosystem: the Strait of Magellan
Saggiomo, Vincenzo; Goffart, Anne ULg; Carrada, Gian Carlo et al

in Journal of Marine Systems (1994), 5

The spatial patterns of nitrate, phytoplankton size-fractionated chlorophyll a, photosynthetic pigments detected by HPLC and primary production were studied at the end of the austral summer ... [more ▼]

The spatial patterns of nitrate, phytoplankton size-fractionated chlorophyll a, photosynthetic pigments detected by HPLC and primary production were studied at the end of the austral summer (February–March 1991), in the Strait of Magellan to provide insight into the mechanisms governing this seemi-enclosed periantartic ecosystem. Climatological peculiarities, hydrodynamic constraints, runoff and land forcing were considered. The most important features identified for this area were the confinement of the microphytoplankton fraction to the external parts of the Strait and the rather uniform dimensional structure of the phytoplankton communities ( < 5 μm) within the internal sectors. In particular, the nanoplanktonic fraction (10 - 2 μm) comprised 33 %, while the picoplanktonic one (2 - 0.5 μm) represented 62% of the total. The concentration of active Chl. a and plant pigments detected by HPLC, nitrate and primary production showed an uneven but similar distribution, allowing for the characterization of different sectors within the Strait, according to different types and intensities of forcing factors. The different ecological sectors identified along the Strait were associated with distinct hydrographic typologies: an oligotrophic, wind-mixed coastal area, adjacent to the Pacific opening; a high runoff fjord and a divergence zone in the Andean sectors; a stratified inland sea in the basin-like part of the channel (Paso Ancho) and a shallow, tidally mixed system in the Patagonian sectors. Areas of relatively low and high phytoplankton biomass and primary production alternate along the Strait, according to the hydrographic structures of the different sectors. Phytoplankton biomass, in terms of active Chl. a (spectrofluorometric determination) ranged between 10 and 51 mg m−2 and primary production between 275 and 1170 mg C m−2 d−1. The assemblage of plant pigments detected by HPLC indicated that the high levels of phytoplankton pigments and production were most likely attributable to Chlorophytes, Prasinophytes, Prymnesiophytes and/or Gyrodinium and Gymnodinium-like Dinoflagellates that were submitted to natural senescence and to superfluous feeding activity; while, when Diatoms, Cryptomonads and Prymnesiophytes were dominant, efficient zooplankton grazing occurred and characterized a balanced food chain. The spatial distribution of the parameters considered was related to hydrologic conditions indicating a Pacific water influence in the entire channel. [less ▲]

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See detailRelationship between alpha 2-adrenergic function and suicidal behavior in depressed patients.
Pitchot, William ULg; Ansseau, Marc ULg; Gonzalez Moreno, A. et al

in Psychiatry Research (1994), 52(2), 115-23

The current main neurochemical theories of the biological correlates of suicidal behavior involve serotonergic and, to a lesser extent, dopaminergic systems. Few data are available about the possible ... [more ▼]

The current main neurochemical theories of the biological correlates of suicidal behavior involve serotonergic and, to a lesser extent, dopaminergic systems. Few data are available about the possible implication of the noradrenergic function. In the present study, we assessed the growth hormone response to clonidine, a selective alpha 2-adrenergic agonist, in 15 DSM-III-R major depressive inpatients with a history of suicide attempts, compared with 15 age- and gender-matched major depressive inpatients without a history of suicidal behavior. Mean (+/- SD) growth hormone peak responses to clonidine were significantly lower in the group of suicide attempters than in the control group: 2.93 +/- 3.01 ng/ml vs. 8.28 +/- 8.15 ng/ml. Therefore, these results suggest that a blunted growth hormone response to clonidine could be a biological correlate of suicidal behavior. [less ▲]

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See detailSynthesis and pharmacology of pyrid-3-yl sulfonylureas and thioureas as astrocytic Na+ 2Cl- K+ cotransporter inhibitors
Masereel, B.; Renard, P.; Pirotte, Bernard ULg et al

in European Journal of Medicinal Chemistry (1994), 29

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See detailTEMPERATURE-DEPENDENCE OF GROWTH, ENZYME-SECRETION AND ACTIVITY OF PSYCHROPHILIC ANTARCTIC BACTERIA
Feller, Georges ULg; Narinx, E.; Arpigny, J. L. et al

in Applied Microbiology & Biotechnology (1994), 41(4), 477-479

Five psychrophilic Antarctic bacteria have been selected for their capacity to secrete exoenzymes into culture medium. These strains are able to grow from 0 to about 25 degrees C. However, production of ... [more ▼]

Five psychrophilic Antarctic bacteria have been selected for their capacity to secrete exoenzymes into culture medium. These strains are able to grow from 0 to about 25 degrees C. However, production of lipase from Moraxella, alpha-amylase from Alteromonas haloplanctis, beta-lactamase from Psychrobacter immobilis and protease from Bacillus is maximal at temperatures close to that of their environment (-2 to 4 degrees C) and is strongly inhibited at higher temperatures. This thermal effect involves alterations in the secretory pathway in the upper range of temperatures, losses due to the enzyme thermal lability and in some cases to reduction in cell development. The apparent optimal activity temperature of these enzymes is between 30 and 40 degrees C, i.e. about 20 degrees C lower than that of their mesophilic counterparts. [less ▲]

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See detailTranscription and expression analysis, using lacZ and phoA gene fusions, of Mycobacterium fortuitum beta-lactamase genes cloned from a natural isolate and a high-level beta-lactamase producer.
Timm, J; Perilli, M G; Duez, Colette ULg et al

in Molecular Microbiology (1994), 12(3), 491-504

The gene encoding a class A beta-lactamase was cloned from a natural isolate of Mycobacterium fortuitum (blaF) and from a high-level amoxicillin-resistant mutant that produces large amounts of beta ... [more ▼]

The gene encoding a class A beta-lactamase was cloned from a natural isolate of Mycobacterium fortuitum (blaF) and from a high-level amoxicillin-resistant mutant that produces large amounts of beta-lactamase (blaF*). The nucleotide sequences of the two genes differ at 11 positions, including two in the region upstream from the coding sequence. Gene fusions to Escherichia coli lacZ and transcription and expression analysis of the cloned genes in Mycobacterium smegmatis indicated that high-level production of the beta-lactamase in the mutant is mainly or wholly due to a single base pair difference in the promoter. These analyses also showed that transcription and translation start at the same position. A comparison of the amino acid sequence of BlaF, as predicted from the nucleotide sequence, with the determined N-terminal amino acid sequence indicated the presence of a typical signal peptide. The fusion of blaF (or blaF*) to the E. coli gene phoA resulted in the production of BlaF-PhoA hybrid proteins that had alkaline phosphatase activity. These results demonstrate that phoA can be used as a reporter gene for studying protein export in mycobacteria. [less ▲]

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See detailChloride and Inorganic Phosphate Modulate Binding of Oxygen to Bovine Red Blood Cells
Gustin, Pascal ULg; Detry, Benoît; Cao, M. L. et al

in Journal of Applied Physiology (Bethesda, Md. : 1985) (1994), 77(1), 202-208

The influence of Pi and Cl on the equilibrium of oxygen binding to bovine red blood cells was assessed by plotting the whole blood oxygen dissociation curve measured under standard conditions with and ... [more ▼]

The influence of Pi and Cl on the equilibrium of oxygen binding to bovine red blood cells was assessed by plotting the whole blood oxygen dissociation curve measured under standard conditions with and without added KCl and K2HPO4. Both salts shifted the oxygen dissociation curve to the right. This effect was more marked at the highest saturation levels. At a given saturation level, the anion-induced shift was linearly related to the concentration of salt added to the blood. Cl had a greater effect than Pi. The relationship between changes in Po2 at 50% hemoglobin saturation (in Torr) and concentrations of ions added (in mmol/l) was equal to 0.0515[Cl] + 0.0302[Pi] (r2 = 0.94; P < 0.001). These changes were not due to the hyperosmolality induced by salt addition, since sucrose added in place of salts was without effect on the measured parameters. The oxygen exchange fraction expressed as percentage of saturation, i.e., the difference in hemoglobin saturation when Po2 decreases from 130 to 40 Torr, was linearly correlated to added anion concentration (in mmol/l) (= 0.102[Cl] + 0.059[Pi] (r2 = 0.95; P < 0.001)). No significant interaction between the anions was observed; their effects were purely additive. This original mechanism of controlling the oxygen affinity of bovine blood may have clinical relevance: Cl and Pi could be used to increase oxygen transport efficiency in hypoxic animals [less ▲]

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See detailAnalyse de variables associées à l’action pédagogique dans un programme d’activités physiques quotidiennes au niveau élémentaire
Cloes, Marc ULg; Delfosse, Catherine; Ledent, Maryse et al

in Revue de l'Education Physique (1994), 34(2-3), 103-116

Dans notre société, où la notion d'effort physique régulier tend à disparaître, l'école devrait être investie d'une mission préventive. Elle devrait être à même de proposer aux enfants des occasions de ... [more ▼]

Dans notre société, où la notion d'effort physique régulier tend à disparaître, l'école devrait être investie d'une mission préventive. Elle devrait être à même de proposer aux enfants des occasions de pratique susceptibles de compenser les lacunes existantes. Les résultats de ces expériences soulignent fréquemment les effets favorables de l'activité quotidienne sur les aptitudes physiques et/ou motrices des enfants qui y participaient. ... [less ▲]

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See detailModèles de cubage pour essences multi-tiges : application à des plantations d'acacia
Lejeune, Philippe ULg; Rondeux, Jacques ULg

in Cahiers Agricultures (1994), 3(3), 189-194

Tree-volume equations were devised to estimate the volume of wood (excluding bark) of Acacia auriculiformis A. Cunn ex Benth fuelwood plantations in Zaïre. The tables give the total volume of stems and ... [more ▼]

Tree-volume equations were devised to estimate the volume of wood (excluding bark) of Acacia auriculiformis A. Cunn ex Benth fuelwood plantations in Zaïre. The tables give the total volume of stems and branches to an upper girth limit of 9 cm, together with the volumes according to the following classes of girth : 9-14, 15-44 and over 45 cm. Because this species has a high proportion of multiple-stem trees (which begin forking below the breast-height level), girth at 1.30 m is a relatively meaningless concept. Taking the extent of this variable in tree volume estimation into account, various expressions of girth were investigated. Instead of considering each stem girth individually, a "standardised" girth at 1.30 m (from ground level) was adopted. For any given tree, this corresponds to the quadratic sum of all girths measured at 1,30 m. [less ▲]

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See detailSubcellular Localization and Compartmentation of Thiamine Derivatives in Rat Brain
Bettendorff, Lucien ULg; Wins, Pierre; Lesourd, Monique

in Biochimica et Biophysica Acta (1994), 1222(1), 1-6

The subcellular distribution of thiamine derivatives in rat brain was studied. Thiamine diphosphate content was highest in the mitochondrial and synaptosomal fractions, and lowest in microsomal, myelin ... [more ▼]

The subcellular distribution of thiamine derivatives in rat brain was studied. Thiamine diphosphate content was highest in the mitochondrial and synaptosomal fractions, and lowest in microsomal, myelin and cytosolic fractions. Only 3-5% of total thiamine diphosphate was bound to transketolase, a cytosolic enzyme. Thiamine triphosphate was barely detectable in the microsomal and cytosolic fraction, but synaptosomes were slightly enriched in this compound compared to the crude homogenate. Both myelin and mitochondrial fractions contained significant amounts of thiamine triphosphate. In order to estimate the relative turnover rates of these compounds, the animals received an intraperitoneal injection of either [14C]thiamine or [14C]sulbutiamine (isobutyrylthiamine disulfide) 1 h before decapitation. The specific radioactivities of thiamine compounds found in the brain decreased in the order: thiamine > thiamine triphosphate > thiamine monophosphate > thiamine diphosphate. Incorporation of radioactivity into thiamine triphosphate was more marked with [14C]sulbutiamine than with [14C]thiamine. The highest specific radioactivity of thiamine diphosphate was found in the cytosolic fraction of the brain, though this pool represents less than 10% of total thiamine diphosphate. Cytosolic thiamine diphosphate had a twice higher specific radioactivity when [14C]sulbutiamine was used as precursor compared with thiamine though no significant differences were found in the other cellular compartments. Our results suggest the existence of two thiamine diphosphate pools: the bound cofactor pool is essentially mitochondrial and has a low turnover; a much smaller cytosolic pool (6-7% of total TDP) of high turnover is the likely precursor of thiamine triphosphate. [less ▲]

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See detailThe treatment of amiodarone-induced hyperthyroidism. Is there a place for surgery?
Meurisse, Michel ULg; Detroz, Bernard ULg; Messens, D. et al

in Acta Chirurgica Belgica (1994), 94(1), 36-41

In many instances amiodarone-induced hyperthyroidism has been reported as mild, thyroid functions returning to normal after discontinuation of the drug. Nevertheless, life-threatening amiodarone-induced ... [more ▼]

In many instances amiodarone-induced hyperthyroidism has been reported as mild, thyroid functions returning to normal after discontinuation of the drug. Nevertheless, life-threatening amiodarone-induced thyrotoxicosis has also been described. Conventional treatments such as with antithyroid drugs (Thionamide) and corticosteroids are essentially ineffective or fail to stop the dramatic course of the thyroid crisis. This limited efficacy of medical therapy, particularly in patients with previously--neglected or unknown--thyroid disease, prompted us to intervene surgically. We report a series of six patients who underwent total or nearly total thyroidectomy as first line therapy for four of them. Surgery resulted in rapid resolution of thyrotoxicosis with an uneventful postoperative course. This approach has the advantage of immediate and safe efficacy, low risk of relapse and finally, appears to be the only antithyroid treatment that permits continued therapy with amiodarone. [less ▲]

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See detailSurface pressure in SOS models
De Coninck, Joël; Limbourg, Sabine ULg; Newman, Charles

in Thin Solid Films (1994), 244

Microscopic models of the solid-on-solid type were considered to describe the surface pressure of monolayers and bilayers on top of another layer in two and three dimensions. The two interfaces, above and ... [more ▼]

Microscopic models of the solid-on-solid type were considered to describe the surface pressure of monolayers and bilayers on top of another layer in two and three dimensions. The two interfaces, above and below the film, were studied in simultaneous thermal equilibrium without imposing a fixed profile for the first fluid or solid. It is shown that the associated mean field approximation leads to an exact determination of the surface pressure isotherms revealing the possible existence of plateaux, typical of first-order phase transitions. [less ▲]

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See detailIsolation of the missing 5-end of the encoding region of the bovine leukemia virus cell receptor gene.
Ban, J.; Truong, A. T.; Horion, B. et al

in Archives of Virology (1994), 138(3-4),

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See detailAirway occlusion pressure and diaphragm global electromyograph analysis for evaluation of inspiratory muscle drive and neuromechanical coupling in cattle
Desmecht, Daniel ULg; Linden, Annick ULg; Rollin, Frédéric ULg et al

in American Journal of Veterinary Research (1994), 55

Although healthy and diseased bovine respiratory tracts have been intensively studied during the last years, to the authors' knowledge, there have been no attempts to objectively examine the inspiratory ... [more ▼]

Although healthy and diseased bovine respiratory tracts have been intensively studied during the last years, to the authors' knowledge, there have been no attempts to objectively examine the inspiratory drive from the brain to the nerves and muscles and its transformation in pressure. Such technique would be useful in assessing the possibility of altered ventilatory drive or inspiratory muscle fatigue in the context of an animal with ventilatory failure. The relation among ventilation, airway opening occlusion pressure generated 100 milliseconds after onset of inspiration (Pawo100ms) and 6 indexes describing diaphragmatic electromyographic activity (EMGdi) recorded via implanted fishhooks was evaluated during free and impeded CO2 rebreathing in 6 young bulls. The best significant linear correlations (r > 0.8) with inspiratory center afferent stimulation, as judged by end-tidal CO2 concentration in expired air, were found for Pawo100ms, peak moving time average or variance EMGdi, and mean integrated EMGdi, whatever had been the respiratory impedance. However, with an inspiratory load, Pawo100ms responses systematically had greater increase for a given change in the driving EMGdi, implying dependence of the former not only on neural input, but also on configurational factors that determine inspiratory muscle excitation-pressure generation couplings. The reproducibility of EMGdi absolute values and changes was satisfactory up to 10 hours, but could not be repeated from one day to the other. It was concluded that, provided the constancy of the electrical coupling of the recording system to the tissue being studied is ensured, specific EMGdi and Pawo100ms values correlate reliably with amount of CO2 during free and loaded breathing.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailPsychophysiological correlates of suicidal behavior in depression. A preliminary study.
Hansenne, Michel ULg; Pitchot, William ULg; Gonzalez Moreno, A. et al

in Neuropsychobiology (1994), 30(1), 1-3

P300 and contingent negative variation (CNV) were recorded in depressive inpatients with and without history of suicide attempt. The results show a significant reduction of both P300 and CNV in patients ... [more ▼]

P300 and contingent negative variation (CNV) were recorded in depressive inpatients with and without history of suicide attempt. The results show a significant reduction of both P300 and CNV in patients who had attempted suicide as compared with patients who had not. Moreover, a significant correlation was found between the suicidal risk scale and CNV amplitude. Psychophysiological and biochemical implications are discussed. [less ▲]

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See detailFouilles 1994 à l'Abri du Pape et à la Grotte du Bois Laiterie (Province de Namur)
Otte, Marcel ULg; Straus, Lawrence; Lacroix, Philippe et al

in Notae praehistoricae (1994), 14

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See detailcompte rendu de : N. Giovè Marchioli, Alle origini delle abbreviature latine. Una prima ricognizione (I secolo a.C. - IV secolo d.C.)
Rochette, Bruno ULg

in Chronique d'Egypte : Bulletin Périodique de la Fondation Egyptologique Reine Elisabeth (1994)

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See detailEffects of immunization against somatostatin on growth performances and growth hormone, insulin-like growth factor I and insulin plasma levels in young animals
Renaville, Robert ULg; Fernadez, J. J.; Sneyers, Myriam et al

in Zootecnica e Nutrizione Animale (1994), 20

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See detailPilgrimage out of Dispossession
Pagnoulle, Christine ULg

in Commonwealth : Essays and Studies (1994), 17(1), 100-106

Goodison's poems testify to her proud self-assertion, both as woman and as a descendant of African slaves.

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See detailAN IMPROVED ONE-POINT INTEGRATION METHOD FOR LARGE-STRAIN ELASTOPLASTIC ANALYSIS
Stainier, Laurent ULg; Ponthot, Jean-Philippe ULg

in Computer Methods in Applied Mechanics & Engineering (1994), 118(1-2), 163-177

In this paper, we present a new one-point integration method generalizing Flanagan and Belytschko's method (Internat. J. Numer. Methods Engrg. 17 (1981) 679-706) and a modification of Belytschko and ... [more ▼]

In this paper, we present a new one-point integration method generalizing Flanagan and Belytschko's method (Internat. J. Numer. Methods Engrg. 17 (1981) 679-706) and a modification of Belytschko and Bindeman's method (Comput. Methods Appl. Mech. Engrg. 88 (1991) 311-340), both in the frame of large deformation elastoplastic analysis. These stabilization methods are combined with the radial return method used to integrate the constitutive law. Plane strain problems are first considered, and the method is then generalized to axisymmetrical situations. The explicit time integration scheme with its critical timestep is also considered. A few examples are presented that show the great time savings that can be obtained with reduced integration without any loss of accuracy, and even with a gain in the solution quality, since the underintegrated elements prove to be 'flexurally superconvergent'. [less ▲]

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See detailLe projet d'entreprise d'insertion: son impact en termes budgétaires et d'emplois
Defourny, Jacques ULg; Lequet, Nathalie; Tilkin, Michel

in Reflets et Perspectives de la Vie Economique (1994), XXIII(1-2), 157-171

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See detailLes enseignants dans l’expérience pédagogique d’éducation physique quotidienne en Communauté Française de Belgique. Perceptions et réactions
Delfosse, Catherine; Cloes, Marc ULg; Ledent, Maryse et al

in Revue de l'Education Physique (1994), 34(2-3), 89-98

Même dans une démarche pédagogique centrée sur l'enfant, l'enseignant reste le principal décideur. C'est lui qui sélectionne le contenu qu'il considère le plus adéquat aux habiletés et qualités de l ... [more ▼]

Même dans une démarche pédagogique centrée sur l'enfant, l'enseignant reste le principal décideur. C'est lui qui sélectionne le contenu qu'il considère le plus adéquat aux habiletés et qualités de l'enfant, choisir les formes d'organisation, dirige l'interaction en classe et veille à l'établissement du climat de travail le plus favorables à l'épanouissement de l'élève. ... [less ▲]

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See detailInteractions between the biofilm growth and the hydrodynamics in an aerobic trickling filter
Lekhlif, B.; Toye, Dominique ULg; Marchot, Pierre ULg et al

in Water Science & Technology (1994), 29

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See detailCARAIB - A global model of terrestrial biological productivity
Warnant, Pierre ULg; François, Louis ULg; Strivay, David ULg et al

in Global Biogeochemical Cycles (1994), 8(3), 255-270

CARAIB, a mechanistic model of carbon assimilation in the biosphere estimates the net primary productivity (NPP) of the continental vegetation on a grid of 1 degrees x 1 degrees in latitude and longitude ... [more ▼]

CARAIB, a mechanistic model of carbon assimilation in the biosphere estimates the net primary productivity (NPP) of the continental vegetation on a grid of 1 degrees x 1 degrees in latitude and longitude. The model considers the annual and diurnal cycles. It is based on the coupling of the three following submodels; a leaf assimilation model including estimates of stomatal conductance and leaf respiration, a canopy model describing principally the radiative transfer through the foliage, and a wood respiration model. Present-day climate and vegetation characteristics allow the discrimination between ecotypes. In particular, specific information on vegetation distribution and properties is successfully used at four levels; the leaf physiological level, the plant level, the ecosystem level, and the global level. The productivity determined by the CARAIB model is compared with local measurements and empirical estimates showing a good agreement with a global value of 65 Gt C yr(-1). The sensitivity of the model to the diurnal cycle and to the abundance of C-4 species is also tested. The productivity slightly decreases (10%) when the diurnal cycle of the temperature is neglected. By contrast, neglecting the diurnal cycle of solar irradiance produces unrealistically high values of NPP. Even if the importance of this increase would presumably be reduced by the coupling of CARAIB with a nutrient cycle model, this test emphasizes the key role of the diurnal cycle in a mechanistic model of the NPP. Uncertainties on the abundance and spatial distribution of C-4 plants may cause errors in the NPP estimates, however, as demonstrated by two sensitivity tests, these errors are certainly lower than 10% at the global scale as shown by two tests. [less ▲]

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See detailMultiple muscarinic receptor subtypes mediating pulmonary oedema in the rabbit.
Delaunois, Annie ULg; Gustin, Pascal ULg; Ansay, Michel ULg

in Pulmonary Pharmacology (1994), 7(3), 185-93

The effects of various muscarinic antagonists on acetylcholine (ACh)-induced pulmonary oedema were studied in isolated perfused rabbit lungs. ACh induced a dose-dependent increase in the capillary ... [more ▼]

The effects of various muscarinic antagonists on acetylcholine (ACh)-induced pulmonary oedema were studied in isolated perfused rabbit lungs. ACh induced a dose-dependent increase in the capillary filtration coefficient (Kf,c). This effect has been previously related to the activation of the capsaicin-sensitive nerve fibres and the release of substance P. Atropine, pirenzepine (M1-selective antagonist) and 4-DAMP (M3-selective antagonist) altered this response, producing a dose-dependent shift to the right of the ACh concentration-Kf,c response curve. By contrast, the M2-selective antagonist AFDX-116 shifted the ACh concentration-response curve to the left. Atropine, pirenzepine and 4-DAMP also significantly reduced the capsaicin-induced increase in the Kf,c, while AFDX-116 enhanced it. We conclude that multiple muscarinic receptor subtypes are present in the rabbit lung, located on the C-fibres, and are involved in the ACh-induced pulmonary oedema. M1 and M3 receptors seem to stimulate the release of neuropeptides from C-fibres, whereas M2 receptors have an inhibitory effect on these fibers. [less ▲]

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See detailFlow modeling in an underground gasifier at great depth by the Boundary-Element Method
MATHY, B.; PIRLOT, Pierre; Pirard, Jean-Paul ULg et al

in In Situ (1994), 18(4), 399-418

In order to simulate the cavity growth of an underground gasifier in thin seams at great depth, Wilks1 has developed an original model that solves the continuity equation in the horizontal plane with the ... [more ▼]

In order to simulate the cavity growth of an underground gasifier in thin seams at great depth, Wilks1 has developed an original model that solves the continuity equation in the horizontal plane with the hypothesis of radial fluid flow around the injection well. In the model presented here, the continuity equation in the horizontal plane has been taken into account, removing the limiting assumption on flow (radial direction) assumed by Wilks. The simultaneous solution of the continuity equation and the Darcy law has been carried out using the Boundary Element Method (BEM); this method is particularly suitable for solving problems where boundary conditions are of prime importance. The model enables the influences of the permeability of the medium and gasifier geometry to be demonstrated. [less ▲]

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See detailEtude comparative de six systèmes d'immunodosage de la ferritine sérique au cours de maladies rhumatismales
Revenant, M. C.; Vernet, M.; Rymer, J. C. et al

in Eurobiologiste (L') (1994), XXVIII(2), 35-41

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See detailCrise de presse. Le journalisme au péril du « reportage » (France, 1870-1890)
Durand, Pascal ULg

in Quaderni : la Revue de la Communication (1994), 24(automne), 123-152

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See detailEffet différentiel d'un didacticiel d'apprentissage de l'orthographe selon le mode d'utilisation de l'ordinateur
Crahay, Marcel ULg; Huberman, M.

in Education et Recherche (1994), 16(3), 300-326

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See detailMeasurement of Right Ventricular Ejection Fraction and Volume by the Thermodilution Technique in the Unsedated Calf
Amory, Hélène ULg; Mc Entee, Kathleen ULg; Linden, Annick ULg et al

in Research in Veterinary Science (1994), 56(1), 75-81

This study was designed to test the applicability and the reproducibility of the thermodilution method in the measurement of right ventricular ejection fraction (EF), end-diastolic volume (EDV) and end ... [more ▼]

This study was designed to test the applicability and the reproducibility of the thermodilution method in the measurement of right ventricular ejection fraction (EF), end-diastolic volume (EDV) and end-systolic volume (ESV) in unsedated cattle. In the 16 healthy calves studied, it was possible, using a fast response thermodilution catheter, to obtain characteristic exponential steplike washout curves, allowing the calculation of right ventricular EF, EDV and ESV. Five to 10 successive thermodilution curves were recorded within a few minutes and two to five similar sets of measurements were performed throughout the same day to test the reproducibility of the technique. The same protocol was repeated the following day. Right ventricular EF, EDV and ESV were reproducible successively, throughout a given day and on following days. The mean intraset, intraday and interdays coefficients of variation ranged from a mean of 4.0 (SD 4.1) per cent to a mean of 18.2 (SD 7.9) per cent. Values of right ventricular volumes and EF agreed with those previously reported in various animal species. Thermodilution was, therefore, shown to be a useful method for measuring with a satisfactory reproducibility, right ventricular EF, EDV and ESV in the unsedated healthy calf [less ▲]

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See detailTechniques moleculaires de detection et d'identification des agents phytopathogenes.
Lepoivre, Philippe ULg; Kummert, J.; Colinet, D. et al

in Cahiers Agricultures (1994), 3(4),

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See detailLifetime Measurements for the 4p2P° and 5p2P° Levels and calculation of Transition Probabilities in Na I
Lowe, R. M.; Biémont, Emile ULg

in Journal of Physics : B Atomic Molecular & Optical Physics (1994), 27

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See detailPuissance maximale aérobie d’enfants en âge d’école primaire participant ou non à une leçon quotidienne d’activités physiques
Ledent, Maryse; Delfosse, Catherine; Cloes, Marc ULg et al

in Revue de l'Education Physique (1994), 34(2-3), 69-75

Plusieurs études indiquent que, chez l'adulte, il existe une relation significative entre la pratique d'activités physiques et sportives et la diminution des facteurs de risque, surtout cardiovasculaire ... [more ▼]

Plusieurs études indiquent que, chez l'adulte, il existe une relation significative entre la pratique d'activités physiques et sportives et la diminution des facteurs de risque, surtout cardiovasculaire. En particulier, l'endurance qui découle d'une pratique régulière d'activités modérés à intenses de répercute sur la condition du système cardiovasculaire et réduit significativement les risques de troubles cardiaques. ... [less ▲]

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See detailLate Devonian-Early Carboniferous miospores from the Menen borehole, Namur Synclinorium, Belgium
Loboziak, S.; Streel, Maurice ULg; Dusar, M. et al

in Review of Palaeobotany and Palynology (1994), 80(1/2), 55-63

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See detailEvaluation d’une expérience de rénovation de l’enseignement fondamental: Méthodologie de recherche
Piéron, Maurice; Cloes, Marc ULg; Delfosse, Catherine et al

in Revue de l'Education Physique (1994), 34(2-3), 53-58

Les expériences pédagogiques de mise en œuvre de nouvelles méthodes ou structures de rénovation de l'enseignement sont particulièrement ardues à évaluer quant à leurs effets. Se déroulant en milieu ... [more ▼]

Les expériences pédagogiques de mise en œuvre de nouvelles méthodes ou structures de rénovation de l'enseignement sont particulièrement ardues à évaluer quant à leurs effets. Se déroulant en milieu naturel, elles subissent l'influence d'un grand nombre de variables qu'il est bien difficile voire impossible de contrôler et parfois simplement de prendre en compte. Les impondérables sont multiples. La voie la moins aléatoire consiste en une démarche multidimensionnelle qui analyse l'élève et l'enseignant, sous plusieurs points de vue, sans négliger des facteurs d'environnement socio-économiques qui peuvent également se révéler déterminants. ... [less ▲]

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See detailMadin Darby Bovine Kidney Cell Synchronization by Lovastatin: Application to Bovine Herpesvirus-1 Gene Expression
Vanderplasschen, Alain ULg; Hanon, E.; Benarafa, C. et al

in Veterinary Research (1994), 25(6), 555-67

The number of investigations involving cell proliferation has increased rapidly in the last years. One of the major difficulties in studying cell-cycle-related events is obtaining highly synchronous cell ... [more ▼]

The number of investigations involving cell proliferation has increased rapidly in the last years. One of the major difficulties in studying cell-cycle-related events is obtaining highly synchronous cell populations without metabolic imbalance. This study demonstrates that the Madin Darby bovine kidney (MDBK) cells, a commonly used cell line in veterinary research, can be effectively synchronized using lovastatin (Lov), a drug used to treat hypercholesteremia in humans. This was demonstrated by the following results: (i) Lov inhibits cell proliferation in a dose-dependent manner; (ii) Lov synchronizes MDBK cells mainly in the G1 and secondarily in the G2+M cell-cycle phases; (iii) the cytostatic effect of Lov can be specifically inhibited by addition of mevalonate (Mev) (Lov inhibits the synthesis of Mev); (iv) removal of Lov from G1-arrested cultures, followed by addition of Mev, resulted in the synchronous recovery of DNA synthesis; and (v) 5-bromo2'-deoxyuridine incorporation experiments revealed that MDBK cells synchronization by Lov can be followed for at least 3 cycles after removal of Lov and addition of Mev. Furthermore, as an application of investigations based on the availability of synchronized MDBK, we showed that bovine herpesvirus-1 gene expression is independent on the cell cycle. [less ▲]

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See detailAttitude vis-à-vis de l’école chez des enfants en âge d’école primaire, participant ou non à un programme scolaire d’activités physiques quotidiennes
Delfosse, Catherine; Cloes, Marc ULg; Ledent, Maryse et al

in Revue de l'Education Physique (1994), 34(2-3), 77-88

Les questions relatives aux attitudes et à leur modification font très largement partie des préoccupations relevées dans les environnements éducatifs considérés habituellement: l'école et le monde des ... [more ▼]

Les questions relatives aux attitudes et à leur modification font très largement partie des préoccupations relevées dans les environnements éducatifs considérés habituellement: l'école et le monde des loisirs actifs. A l'école, les objectifs d'un programme d'activités physiques et sportives sont évidemment de développer des attitudes favorables à l'égard de l'activité physique régulière. ... [less ▲]

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See detailThe 4s-4p Transitions in Neutral Phosphorus
Biémont, Emile ULg; Martin, F.; Quinet, Pascal ULg et al

in Astronomy and Astrophysics (1994), 283

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See detailGreffes de moelle dans les hémoglobinopathies
Beguin, Yves ULg

in Mini Acta (1994), 26

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See detailPlasma Beta-Endorphin Response of Thoroughbred Horses to Maximal Exercise
Art, Tatiana ULg; Franchimont, P.; Lekeux, Pierre ULg

in Veterinary Record : Journal of the British Veterinary Association (1994), 135(21), 499-502

Ten horses underwent a standardised strenuous treadmill exercise test, before, during and after which measurements were made of plasma beta-endorphin and cortisol concentrations, blood lactate, glucose ... [more ▼]

Ten horses underwent a standardised strenuous treadmill exercise test, before, during and after which measurements were made of plasma beta-endorphin and cortisol concentrations, blood lactate, glucose, haemoglobin and pH, the activities of creatine kinase, lactate dehydrogenase and aspartate amino-transferase, and heart rate, oxygen uptake and expired minute volume. The correlations between the exercise-induced response of beta-endorphin and the changes observed in the other physiological measurements were examined. There was a large variation in the beta-endorphin response of the horses to exercise. The increase in beta-endorphin was correlated significantly and inversely with the treadmill velocity at which maximal oxygen uptake was reached. It was also significantly and directly correlated with the heart rate during recovery, the increase in plasma lactate concentration and the change in blood pH, indicating that the exercise-induced increase in beta-endorphin concentration was smaller in horses with a higher aerobic capacity [less ▲]

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See detailDetection of early sympathetic cardiovascular neuropathy by squatting test in NIDDM.
Marfella, R.; Salvatore, T.; Giugliano, D. et al

in Diabetes Care (1994), 17(2), 149-51

OBJECTIVE--To determine the role of the squatting test in the detection of early sympathetic neuropathy in patients with non-insulin-dependent diabetes mellitus (NIDDM). RESEARCH DESIGN AND METHODS--Three ... [more ▼]

OBJECTIVE--To determine the role of the squatting test in the detection of early sympathetic neuropathy in patients with non-insulin-dependent diabetes mellitus (NIDDM). RESEARCH DESIGN AND METHODS--Three groups of nonsmoking, nonobese subjects were studied: 10 healthy subjects, 10 NIDDM patients without autonomic neuropathy (AN), and 10 NIDDM patients with AN defined by the presence of a pathological deep-breathing value. All subjects were given three postural tests: lying-to-standing, sitting-to-standing, and squatting test. Heart rate (HR) and finger arterial pressure were recorded with a noninvasive technique. RESULTS--Blood pressure (BP) fall (expressed as decremental area) was not significantly different among the groups at standing up after sitting or lying. By contrast, a significantly greater BP drop occurred in NIDDM patients with AN (1,123 +/- 245 mm2) compared with NIDDM patients without AN (460 +/- 232 mm2) or normal subjects (429 +/- 138 mm2, P < 0.001). The HR increase after all the orthostatic maneuvers was smaller in diabetic patients with AN (P < 0.01) compared with that recorded in other groups. Significant correlations were observed between BP fall after squatting and either the expiration:inspiration ratio at deep breathing (r = -0.77, P < 0.001) or the duration of diabetes (r = 0.76, P < 0.001). CONCLUSIONS--The intrinsic orthostatic load of the squatting test, which is greater than conventional postural maneuvers, makes the squatting test an easy and useful test to detect early orthostatic dysregulation in NIDDM. [less ▲]

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See detailL’éthique et l’animal. Eléments pour un débat
Ansay, M.; Delaunois, A.; Gustin, Pascal ULg

in Annales de Médecine Vétérinaire (1994), 138

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See detailQuantitative Assessment of Aerial Ammonia Toxicity to the Nasal Mucosa by Use of the Nasal Lavage Method in Pigs
Urbain, B.; Gustin, Pascal ULg; Prouvost, J. F. et al

in American Journal of Veterinary Research (1994), 55(9), 1335-1340

Effects of atmospheric ammonia (NH3) on the nasal mucosa and somatic growth were investigated in pigs exposed to 4 NH3 concentrations (0; 25; 50; and 100 ppm) for 6 days in a specifically designed air ... [more ▼]

Effects of atmospheric ammonia (NH3) on the nasal mucosa and somatic growth were investigated in pigs exposed to 4 NH3 concentrations (0; 25; 50; and 100 ppm) for 6 days in a specifically designed air-pollutant exposure chamber. Nasal lavage (NAL) was applied to quantify the ammonia-induced inflammatory response by measuring the number of neutrophils and the albumin (porcine serum albumin) concentration in the NAL liquid. In control pigs, these variables remained unchanged throughout the exposure period. In all other groups, an important ammonia concentration-related increase was recorded. The equation of the linear regression line established between the mean values of the number of neutrophils (x 10(3)) per milliliter of NAL liquid (y) recorded at the end of the exposure period and the ammonia concentrations (ppm) was: y = 69.7 + 3.3 [NH3] (r = 0.979; P < 0.020). The increase in the neutrophil count was significant (P < 0.05) at concentrations as low as 25 ppm. For albumin concentration nanograms per milliliter, the corresponding equation was: y = 574 + 14.3 [NH3] (r = 0.953; P < 0.045). However, the first significant change (P < 0.05) in this variable was only obtained for the higher concentration (100 ppm). In exposed pigs, a concentration-related depression of somatic growth was observed. The equation of the regression line plotted relating the individual values of the changes in body weight gain recorded over the exposure period expressed as percentage of the initial body weight (y) and the ammonia concentration was: y = 3.507-0.203 [NH3] + 0.001 [NH3]2 (r = 0.55; P < 0.010).(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailHormonal profile of growing male and female diploïds and triploïds of the blue tilapia, Oreochromis aureus, reared in intensive culture
Mol, K.; Byamungu, N.; Cuisset, B. et al

in Fish Physiology and Biochemistry (1994), 13

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See detailEvaluation de la chimiorésistance de Plasmodium falciparum. Revue des tests in vitro: méthodologie, intérêts et limites
Hayette, Marie-Pierre ULg; Carme, Bernard

in Publications Médicales Africaines (1994), 129

The chloroquine-resistance of Plasmodium falciparum appeared first in Southeast Asia and South-America during the sixties. It reached further the african continent in 1977, through Kenya and Tanzania. In ... [more ▼]

The chloroquine-resistance of Plasmodium falciparum appeared first in Southeast Asia and South-America during the sixties. It reached further the african continent in 1977, through Kenya and Tanzania. In Africa, the front of the resistance spread from East to West, and now completely covers Black Africa with different degrees of resistance. Rapidly, "in vivo" and "in vitro" tests were developped to assess the sensitivity of P. falciparum strains against the different antimalarial drugs. This paper is a review of existing "in vitro" and "in vivo" tests with their interest and limits. [less ▲]

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See detailThe use of acarbose in the prevention and treatment of hypoglycaemia.
Lefebvre, Pierre ULg; Scheen, André ULg

in European Journal of Clinical Investigation (1994), 24 Suppl 3

This paper reviews the use of acarbose in the prevention and treatment of hypoglycaemia. In diet- or sulfonylurea-treated patients, acarbose may reduce the incidence of late postprandial hypoglycaemia. In ... [more ▼]

This paper reviews the use of acarbose in the prevention and treatment of hypoglycaemia. In diet- or sulfonylurea-treated patients, acarbose may reduce the incidence of late postprandial hypoglycaemia. In insulin-treated patients, acarbose treatment usually requires reduction of the insulin dose; one study has shown that 100 mg acarbose at night significantly reduces the incidence of mid-evening and nocturnal hypoglycaemia. Several studies have suggested acarbose to be a useful adjunct to the management of reactive hypoglycaemia in the non-diabetic patients. Long-term prospective studies are still needed to document this last indication of acarbose or other alpha-glycosidase inhibitors. [less ▲]

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See detailEffects of Atmospheric Ammonia on Pulmonary Hemodynamics and Vascular Permeability in Pigs: Interaction with Endotoxins
Gustin, Pascal ULg; Urbain, B.; Prouvost, J. F. et al

in Toxicology and Applied Pharmacology (1994), 125(1), 17-26

The influence of atmospheric ammonia on the somatic growth, the plasma cortisol and ammonia concentrations, and cell blood counts was investigated in pigs exposed to four concentrations (0, 25, 50, and ... [more ▼]

The influence of atmospheric ammonia on the somatic growth, the plasma cortisol and ammonia concentrations, and cell blood counts was investigated in pigs exposed to four concentrations (0, 25, 50, and 100 ppm) for 6 days in a specifically designed air-pollutants exposure chamber. The effects of this gas on pulmonary vascular hemodynamics and permeability and on the endotoxin-induced vascular response were also assessed using an isolated perfused lung preparation. The total pulmonary blood flow resistance (Rt) was partitioned into four components: arterial (Ra), pre-(Ra′) and post-(Rv′) capillary and venous (Rv). The capillary filtration coefficient (Kf,c) was evaluated by using a gravimetric technique. None of the concentrations of ammonia significantly modified the plasma cortisol and ammonia concentrations or the differential leukocyte percentages and total white blood cell count, suggesting an absence of stress related to ammonia. In exposed animals, lethargy and a concentration-related depression of the somatic growth were observed. The equation of the regression line plotted relating the mean values of the changes in body weight gain recorded over the exposure period expressed as percentages of the initial body weight (y) and ammonia concentrations (x) was: y = 3.204 − 0.177x + 0.001x2(r = 0.99; p≤0.013). Endotoxin infused in the perfusion liquid of lungs from unexposed animals for 180 min induced a significant 208% increase in Rt (p < 0.001) which can be ascribed to a 338 and 180% increase in Ra′ and Rv′, respectively. Endotoxin infusion also induced a 62% (p ≤ 0.001) increase in the Kf,c. Exposure of pigs to ammonia at any concentration did not modify the baseline values of any hemodynamic or permeability parameters. However, the hemodynamic response to endotoxins in lungs from pigs exposed to 100 ppm was significantly altered. The increase in Rt, Ra′, and Rv′ observed in unexposed pigs was completely abolished as shown by the limited changes in Rt (+34.9%). An intermediate reaction (+131.7%) was obtained in pigs exposed to 50 ppm. This inhibiting effect of ammonia was closely correlated with gas concentration by a linear regression (r = 0.99; p ≤ 0.037). The changes in the Kf,c recorded in the control group were not modified by exposure to ammonia. It was concluded that exposure of pigs to aerial ammonia concentrations from 0 to 100 ppm for 6 days has no direct effect on the pulmonary microvascular hemodynamics and permeability and induces no stress response. A marked depressive effect on the somatic growth is observed at concentrations greater than 25 ppm. Concentrations greater than 50 ppm can modulate the pulmonary vascular response to endotoxins [less ▲]

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See detailL’expérience pédagogique: «Rénovation de l’enseignement fondamental - Développement corporel des enfants de 21/2 ans à 12 ans».
Piéron, Maurice; Cloes, Marc ULg; Delfosse, Catherine et al

in Informations pédagogiques (1994), 10

Delmelle (1992) a clairement défini la philosophie général de l'expérience pédagogique: "Compte tenu des besoins, des structures administratives en vigueur, des disponibilités matérielles et humaines et ... [more ▼]

Delmelle (1992) a clairement défini la philosophie général de l'expérience pédagogique: "Compte tenu des besoins, des structures administratives en vigueur, des disponibilités matérielles et humaines et des contraintes budgétaires, la commission a défini, de la manière suivante, la philosophie d'une rénovation possible à échéance immédiate. (a) Dans l'enseignement fondamental, tout enfant doit pratiquer l'activité physique à raison d'une séance quotidienne; il est parfaitement possible d'agir en sorte que les activités et les structures générales de l'école ne soient pas bouleversées. ..." ... [less ▲]

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See detailUne contrefaçon liégeoise exemplaire : les Œuvres du philosophe bienfaisant (1764)
Droixhe, Daniel ULg

in Bulletin de la Société Royale Le Vieux-Liège (1994), 265

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See detailNescio als 'Animal Metaphysicum'
Yans, Baudoin ULg

in Spiegel der Letteren (1994), (1), 45-62

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See detailEvolution of shoot density of the Posidonia seagrass bed of Calvi Bay (Corsica)
Soullard, Mady; Bourge, Isabelle; Fogel, Julie et al

in Vie et Milieu (1994), 44

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See detailAbnormal temporal patterns of glucose tolerance in obesity: relationship to sleep-related growth hormone secretion and circadian cortisol rhythmicity.
Van Cauter, E. V.; Polonsky, K. S.; Blackman, J. D. et al

in Journal of Clinical Endocrinology and Metabolism (1994), 79(6), 1797-805

To define the chronobiology of glucose tolerance and insulin secretion in obesity, nine obese men and nine lean men were studied during constant glucose infusion for 53 h, including 8 h of nocturnal sleep ... [more ▼]

To define the chronobiology of glucose tolerance and insulin secretion in obesity, nine obese men and nine lean men were studied during constant glucose infusion for 53 h, including 8 h of nocturnal sleep, 28 h of continuous wakefulness, and 8 h of daytime sleep. Blood samples were collected at 20-min intervals to assay glucose, insulin, C-peptide, cortisol, and GH. Sleep was polygraphically monitored. Abnormal temporal profiles of glucose regulation were observed during wakefulness and sleep in obese subjects. During daytime hours, the normal profile of glucose tolerance was reversed, as an improvement, rather than a deterioration, was observed from morning to late evening. This reversal of the daytime pattern appeared to be caused by a dual defect in glucose regulation during the previous night. Indeed, during early sleep, GH secretion was markedly reduced, and the nocturnal rises of glucose and insulin secretion were dampened. During late sleep, obese subjects failed to suppress insulin secretion and plasma glucose, resulting in high morning levels. Comparisons of metabolic and hormonal patterns during nocturnal and daytime sleep suggest that the failure to suppress insulin secretion in late sleep may reflect a relative insensitivity of the beta-cell to acute inhibitory effects of cortisol in addition to insulin resistance. [less ▲]

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See detailMagnesium et metabolisme glucidique.
Lefebvre, Pierre ULg; Paolisso, G.; Scheen, André ULg

in Thérapie (1994), 49(1), 1-7

The interrelationships between magnesium and carbohydrate metabolism have regained considerable interest over the last few years. Insulin secretion requires magnesium: magnesium deficiency results in ... [more ▼]

The interrelationships between magnesium and carbohydrate metabolism have regained considerable interest over the last few years. Insulin secretion requires magnesium: magnesium deficiency results in impaired insulin secretion while magnesium replacement restores insulin secretion. Furthermore, experimental magnesium deficiency reduces the tissues sensitivity to insulin. Subclinical magnesium deficiency is common in diabetes. It results from both insufficient magnesium intakes and increase magnesium losses, particularly in the urine. In type 2, or non-insulin-dependent, diabetes mellitus, magnesium deficiency seems to be associated with insulin resistance. Furthermore, it may participate in the pathogenesis of diabetes complications and may contribute to the increased risk of sudden death associated with diabetes. Some studies suggest that magnesium deficiency may play a role in spontaneous abortion of diabetic women, in fetal malformations and in the pathogenesis of neonatal hypocalcemia of the infants of diabetic mothers. Administration of magnesium salts to patients with type 2 diabetes tend to reduce insulin resistance. Long-term studies are needed before recommending systematic magnesium supplementation to type 2 diabetic patients with subclinical magnesium deficiency. [less ▲]

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See detailDetailed Study of a Molecule in a Molecule N-Acetyl-L-Tryptophanamide in a Active-Site Model of Alpha-Chymotrypsin
Dive, Georges ULg; Dehareng, Dominique ULg; Ghuysen, Jean-Marie ULg

in Journal of the American Chemical Society (1994), 116(6), 2548-2556

Six complexes between a model active site of alpha-chymotrypsin (261 atoms) and N-acetyl-L-tryptophanamide (33 atoms) were optimized at the semiempirical AM1 level. In one of these complexes, a water ... [more ▼]

Six complexes between a model active site of alpha-chymotrypsin (261 atoms) and N-acetyl-L-tryptophanamide (33 atoms) were optimized at the semiempirical AM1 level. In one of these complexes, a water molecule was included. A detailed study at the geometric and energetic levels is presented. The discussion deals with the nature of the interaction, the effect of the environment, the ligand deformation, the backbone relaxation, the water molecule freedom, and the comparison with the molecular mechanics results. [less ▲]

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See detailPossessoire, pétitoire, référé, plainte, bornage et revendication ...Quand tout s'emmêle!
Lecocq, Pascale ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (1994)

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See detailInvestigation of the Western Mediterranean's hydrodynamics with the GHER three-dimensional primitive equation model
Beckers, Jean-Marie ULg; Brasseur, P.; Djenidi, Salim ULg et al

in Coastal and Estuarine Studies (1994), 46

A three-dimensional, non-linear, primitive equation model with turbulent closure developed at the GeoHydrodynamics and Environment Research Laboratory (GHER), University of Liège, is designed to define ... [more ▼]

A three-dimensional, non-linear, primitive equation model with turbulent closure developed at the GeoHydrodynamics and Environment Research Laboratory (GHER), University of Liège, is designed to define marine weather-like processes ranging from mesoscale tides and storm surges, to synoptic frontal and eddy structures, to macroscale slowly-varying currents characteristic of the so-called “general circulation”. The model is applied here to the study of the hydrodynamics of the western Mediterranean as both a metagnostic (i.e. system-oriented) model and a diagnostic (i.e. process-oriented) model with both models allowed to run simultaneously and interactively. Critical processes such as deep water formation and the instabilities of the Algerian Current, are studied to provide a basic understanding of the physics needed to adequately parameterize sub-grid scale processes in the basin wide metagnostic model. This general circulation model provides boundary conditions for the finer grid diagnostic studies as well as the general overview of the basin's hydrodynamics. Further improvement is achieved by concurrent use of a variational inverse model to provide initial data fields and boundary conditions for the direct model. In turn, the metagnostic model provides hydrodynamic constraints which are imposed to the variational principle to ensure an interpolation/extrapolation of data compatible with the system's hydrodynamics. Results viz (i) a diagnostic study of the Algerian Current, (ii) a metagnostic study of the seasonal variability of the western Mediterranean Sea, are presented and compared with observations and with results of simpler (quasi-geostrophic, reduced gravity, etc.) models. Possible improved hydrodynamic forecasts of seasonal and interannual variability with the 3D primitive equation model is discussed with particular attention to the forecast's sensitivity to initial and boundary conditions. [less ▲]

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See detailFate of unstimulated Latissimus Dorsi transposed into the chest and applied to cardiomyoplasty
Radermecker, M. A.; Reznik, M.; Vivario, M. et al

in Research in Surgery (1994), 6(1), 35-39

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See detailAcute biochemical variations induced by four different calcium salts in healthy male volunteers
Reginster, Jean-Yves ULg; Denis, D; Bartsch, V et al

in Equilibre (1994), 19

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See detailDimensionless critical shear stress evaluation from flume experiments using different gravel beds
Petit, François ULg

in Earth Surface Processes & Landforms (1994)

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See detailMicroencapsulation by Coacervation of Poly(lactide-co-glycolide). III. Characterization of the Final Microspheres
Nihant, Nicole; Stassen, Sophie; Grandfils, Christian ULg et al

in Polymer International (1994), 34

This paper deals with protein microencapsulation by coacervation of poly(lactide-co-glycolide) solutions in CH2Cl2 induced by the addition of silicone oils of various viscosities. This coating technique ... [more ▼]

This paper deals with protein microencapsulation by coacervation of poly(lactide-co-glycolide) solutions in CH2Cl2 induced by the addition of silicone oils of various viscosities. This coating technique proceeds along three steps: phase separation of the coating polyester, adsorption of the coacervate droplets around the protein phase, and hardening of microparticules. Size distribution, surface morphology and internal porosity of the final microspheres clearly depend on the main characteristics of the coacervate, particularly the viscosity, in a direct connection with the CH2Cl2 content. Indeed, the whole porosity (which may be as high as 80%), average pore size and broadness of pore size distribution decrease as the coacervate is more viscous. Hardening of the coacervate droplets is thus so fast that the organic solvent is entrapped within the polymer matrix and predetermines the internal porosity. Finally, size distribution of microspheres is bimodal in a clear relation with the coacervate viscosity. A less viscous coacervate favours smaller microspheres (within the 7-90 µm range), contaminated with a minor population of microparticles below 4 µm. [less ▲]

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See detailMarqueurs tumoraux
Charlier, Corinne ULg; Plomteux, Guy ULg

in Focus Diagnostica (1994), 2

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See detailDe réels progrès ont-ils été faits dans le traitement de l'ostéoporose ?
Reginster, Jean-Yves ULg; DEROISY, Rita ULg; Franchimont, P

in Les Nouvelles de Rhumatologie (1994), 4

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See detailMéléagre dans les Argonautiques
Renaud, Jean-Michel ULg

in Uranie : Mythes et Littératures (1994), 4

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See detailAcute myocardial infarction in a young female migraineur: sumatriptan suspected, but found not guilty.
Schoenen, Jean ULg; Delree, P.; Moonen, Gustave ULg

in Cephalalgia : An International Journal of Headache (1994), 14(4), 305

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See detailDerechef Ounamon, 2,13-14
Winand, Jean ULg

in Göttinger Miszellen (1994), 139

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See detailPolitical Aesthetics: Cross-Cultural Desire and the Capitulation of Form in the Work of Kazuo Ishiguro and Salman Rushdie
Delrez, Marc ULg

in BELL. Belgian Essays on Language and Literature (1994)

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See detailLocalisation scintigraphique de tumeurs neuroendocrines et de leurs métastases par un analogue de la somatostatine: [111In-DTPA-d-phe1] octreotide
Beckers, Albert ULg; Pham, V. T.; Abs, R. et al

in Médecine & Chirurgie Digestives (1994), 23(3), 145-150

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See detailCationic and secretory effects of BPDZ 44 and diazoxide in rat pancreatic islets
Antoine, M.-H.; Pirotte, Bernard ULg; Hermann, M. et al

in Experientia (1994), 50

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See detailA comparison of balloon-expandable-stent implantation with balloon angioplasty in patients with coronary artery disease. Benestent Study Group.
Serruys, P. W.; de Jaegere, P.; Kiemeneij, F. et al

in The New England journal of medicine (1994), 331(8), 489-95

BACKGROUND: Balloon-expandable coronary-artery stents were developed to prevent coronary restenosis after coronary angioplasty. These devices hold coronary vessels open at sites that have been dilated ... [more ▼]

BACKGROUND: Balloon-expandable coronary-artery stents were developed to prevent coronary restenosis after coronary angioplasty. These devices hold coronary vessels open at sites that have been dilated. However, it is unknown whether stenting improves long-term angiographic and clinical outcomes as compared with standard balloon angioplasty. METHODS: A total of 520 patients with stable angina and a single coronary-artery lesion were randomly assigned to either stent implantation (262 patients) or standard balloon angioplasty (258 patients). The primary clinical end points were death, the occurrence of a cerebrovascular accident, myocardial infarction, the need for coronary-artery bypass surgery, or a second percutaneous intervention involving the previously treated lesion, either at the time of the initial procedure or during the subsequent seven months. The primary angiographic end point was the minimal luminal diameter at follow-up, as determined by quantitative coronary angiography. RESULTS: After exclusions, 52 patients in the stent group (20 percent) and 76 patients in the angioplasty group (30 percent) reached a primary clinical end point (relative risk, 0.68; 95 percent confidence interval, 0.50 to 0.92; P = 0.02). The difference in clinical-event rates was explained mainly by a reduced need for a second coronary angioplasty in the stent group (relative risk, 0.58; 95 percent confidence interval, 0.40 to 0.85; P = 0.005). The mean (+/- SD) minimal luminal diameters immediately after the procedure were 2.48 +/- 0.39 mm in the stent group and 2.05 +/- 0.33 mm in the angioplasty group; at follow-up, the diameters were 1.82 +/- 0.64 mm in the stent group and 1.73 +/- 0.55 mm in the angioplasty group (P = 0.09), which correspond to rates of restenosis (diameter of stenosis, > or = 50 percent) of 22 and 32 percent, respectively (P = 0.02). Peripheral vascular complications necessitating surgery, blood transfusion, or both were more frequent after stenting than after balloon angioplasty (13.5 vs. 3.1 percent, P < 0.001). The mean hospital stay was significantly longer in the stent group than in the angioplasty group (8.5 vs. 3.1 days, P < 0.001). CONCLUSIONS: Over seven months of follow-up, the clinical and angiographic outcomes were better in patients who received a stent than in those who received standard coronary angioplasty. However, this benefit was achieved at the cost of a significantly higher risk of vascular complications at the access site and a longer hospital stay. [less ▲]

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See detailThe Moorcock / Hawkwind Connection: Science Fiction and Rock & Roll Culture
Delville, Michel ULg

in Foundation: The Review of Science Fiction (1994)

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See detailLes choix stratégiques actuels dans la prévention du processus diabétogène auto-immun
Geenen, Vincent ULg; Martens, Henri ULg; Kecha, Ouafae et al

in Médecine et Hygiène (1994), 52

Le diabète insulino-dépendant (DID) est de plus en plus admis comme résultant d'une rupture de la tolérance immunitaire vis-à-vis de la cellule ß pancréatique. La compréhension des mécanismes centraux et ... [more ▼]

Le diabète insulino-dépendant (DID) est de plus en plus admis comme résultant d'une rupture de la tolérance immunitaire vis-à-vis de la cellule ß pancréatique. La compréhension des mécanismes centraux et périphériques de la tolérance vis-à-vis de la cellule ß doit logiquement aboutir à une prévention non toxique et efficace du DID. Deux choix stratégiques sont proposés à l'heure actuelle. D'une part, la tolérance périphérique à l'insuline en tant que cible du processus auto-immun pourrait être restaurée via l'administration d'insuline à faibles doses par voie sous-cutanée ou orale. D'autre part, le facteur de croissance apparenté à l'insuline de type 2 (IGF2) pourrait réinduire la tolérance centrale de l'insuline et, secondairement, de la cellule ß insulino-sécrétrice. [less ▲]

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See detailLa prothèse pénienne dans le traitement de l'impuissance: La décision du patient
Kempeneers, Philippe ULg; Andrianne, R.; Mormont, Christian ULg

in Cahiers de Sexologie Clinique (1994), 20(124), 31-36

In the population who look advice from our interdisciplinary team, penile prosthesis is estimated been indicated in about 13% of the cases. Among these 13% of patients to whom a penile implant was ... [more ▼]

In the population who look advice from our interdisciplinary team, penile prosthesis is estimated been indicated in about 13% of the cases. Among these 13% of patients to whom a penile implant was proposed, only 32% agreed to undergo the operation. From this statement, we wondered why some men require penile implantation and other ones resign. A follow-up survey allowed to compare the experience of 19 implants recipients to the experience of 17 patients who have refused this solution. The cost of the device appears being a very determinant argument in the decision to reject penile implantation. Our study fails to distinguls clearly the two groups of subjects on the basis of another motivation criterion. [less ▲]

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See detailINTERNATIONAL-CONFERENCE ON BARBUS - PRESENT AND FUTURE - FOREWORD
BERREBI, P.; Poncin, Pascal ULg

in Bulletin Francais De La Peche Et De La Pisciculture (1994), (334), 167-168

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See detailDe l'école à l'entreprise ou le processus d esocialisation mis en échec
Robert, Jocelyne ULg

in Eucation-Formation (1994)

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See detailBon anniversaire. Compte rendu de la Xe Table Ronde ‘Informatique et Égyptologie, Bordeaux, 1994’
Winand, Jean ULg

in Revue. Informatique et Statistique dans les Sciences Humaines (1994), 41

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See detailAsthme et bêta2-agonistes de longue durée d'action
Bury, Thierry ULg; Kayambe, JM; Radermecker, Maurice ULg

in Médecine et Hygiène (1994), 52

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See detailEffect of the emulsion stability on the morphology and porosity of semicrystalline poly-L-lactide micriparticles prepared by w/o/w double emulsion-evaporation
Schugens, Ch; Laruelle, N; Nihant, N et al

in Journal of Controlled Release (1994), 32

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See detailA semiautomated test apparatus for studying partner preference behavior in the rat.
Bakker, Julie ULg; van Ophemert, J.; Eijskoot, F. et al

in Physiology & Behavior (1994), 56(3), 597-601

A semiautomated three-compartment box (3CB) for studying partner preference behavior of rats is described. This apparatus automatically records the rat's time spent in each compartment, as well as the ... [more ▼]

A semiautomated three-compartment box (3CB) for studying partner preference behavior of rats is described. This apparatus automatically records the rat's time spent in each compartment, as well as the locomotor activity (i.e., the number of visits an animal pays to each compartment). Software was developed for calculating partner preference scores. Behavioral testing in the semiautomated 3CB, which is a modification of an earlier version, is less time consuming and less laborious. Three 3CBs can be observed simultaneously by two trained observers, and the behavioral interactions of three experimental animals with the stimulus animals can be observed and scored by hand. The use of the new apparatus was validated by studying adult partner preference behavior of neonatally ATD-treated male rats. The collected data fully corroborate previous results, obtained in the earlier version of the 3CB, again revealing the behavioral bisexual nature of these ATD males. A new finding was the much higher locomotor activity of the ATD males compared to controls. [less ▲]

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See detailAlienating Language and Darl's Narrative Consciousness in As I Lay Dying
Delville, Michel ULg

in The Southern Literary Journal (1994)

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See detailTechnical Study of Some Major Parameters Influencing the Performances of an Aerosol Delivery Equipment Suitable for Calves
Genicot, Bruno; Peckova, M.; Close, Roland et al

in Veterinary Research (1994), 25(5), 468-77

Aerosol delivery equipment, suitable for the treatment of bovine respiratory dysfunctions and including 2 parallelly positioned jet nebulizers, was studied in depth in order to determine the optimal ... [more ▼]

Aerosol delivery equipment, suitable for the treatment of bovine respiratory dysfunctions and including 2 parallelly positioned jet nebulizers, was studied in depth in order to determine the optimal working conditions in the field. Indeed, some factors might reasonably alter the performance of this equipment. Among these factors, the influences of the parallel position of jet nebulizers (in order to accommodate the breathing requirements of the cattle and achieve a rapid treatment), of the long feed pipe delivering compressed air (in order to keep the animal away from the compressor unit), and finally of the ambient temperature were studied, this equipment being essentially used during the winter season. This equipment could accommodate the breathing needs of cattle weighing up to 225 kg if a pressure of 600 kPa was developed upstream to the nebulizers. The rate of atomization was significantly reduced when working at ambient air temperatures (272.25 K < T < 274.65 K) close to those encountered in winter. This was especially true when pressure upstream to the nebulizers did not exceed 500 kPa. The immersion of the feed pipe for compressed air in hot water led to an increase in the rate of atomization without raising evaporative water losses, and reduced the drop in temperature in the nebulizer solution. Finally, the rate of atomization significantly increased when the face mask including the nebulizers was maintained so that the nebulizers were in a vertical position or at an angle not less than 60 degrees with respect to the ground. [less ▲]

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See detailLa rhétorique, la sémiotique et le comique
Defays, Jean-Marc ULg

in RSSI : Recherches Sémiotiques = RSSI: Semiotic Inquiry (1994), 14(3), 81-101

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See detailIntensities of the doublet-quadruplet intersystem transitions in C II and N III
Biémont, Emile ULg; Delahaye, F.; Zeippen, C. J.

in Journal of Physics : B Atomic Molecular & Optical Physics (1994), 27

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See detailRock progressif et analyse musicale
Pirenne, Christophe ULg

in Art&Fact (1994), 13

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See detailBI-BASED 2223 SUPERCONDUCTING POLYCRYSTALLINE MATERIALS PREPARED BY EITHER A SOLID-STATE ROUTE OR A GLASSY MATRIX PRECURSOR METHOD - CHEMICAL-ANALYSIS AS WELL AS ELECTRICAL AND THERMAL TRANSPORT-PROPERTIES
Cloots, Rudi ULg; Bougrine, Hassan ULg; HOUSSA, M. et al

in Physica C (1994), 231(3-4), 259-270

Two routes have been followed in order to prepare Bi1.7Pb0.3Sr2Ca2Cu3O(y) superconducting materials. Bi1.7Pb0.3CuO4 is always used as one of the starting basic materials. The first route involves a new ... [more ▼]

Two routes have been followed in order to prepare Bi1.7Pb0.3Sr2Ca2Cu3O(y) superconducting materials. Bi1.7Pb0.3CuO4 is always used as one of the starting basic materials. The first route involves a new experimental procedure based on the solid state synthesis of separate intermediate phases, mixed together in a two (Bi1.7Pb0.3CuO4 + 2SrCaCuO3), three (Bi1.7Pb0.3CuO4+2SrCuO2+2CaCO3) or four (Bi1.7Pb0.3CuO4+(1/12)Sr8Ca6Cu24O41 + (3/2)CaCO3 + (4/3)SrCO3) powder process. Electric resistivity versus temperature measurements are presented. Even though the T(c)(0) of each sample is above 100 K, X-ray diffraction shows that the main phase is the 2212 phase in each case. Relatively pure 2223 materials have, however, successfully been produced by the second method, which starts from a glassy intermediate phase and involves a so-called 'matrix' method. The glass precursor phase is composed of one (Bi1.7Pb0.3CuO4), two (Bi1.7Pb0.3CuO4 + 2CaCO3), and three (Bi1.7Pb0.3CuO4 + (3/2)CaCO3 + (4/3)SrCO3) components as for the solid state routes. The role of both the added alkaline earth crystalline compounds and the glass matrix precursors in this second method turns out to be very important. We propose a schematic structural model in order to explain the selectivity of the starting materials. SrCaCuO3 is found to be a good precursor of the 2212 phase, while SrCuO2 gives rise to the 2223 phase. It seems that the presence of CaCO3 in the glassy intermediate phase, thus acting as a cation reservoir, is very useful for the production of the 2223 phase. Electric resistivity, thermal conductivity and thermopower versus temperature measurements are also presented and discussed in terms of intergrowths and variations of cationic compositions in the Bi-based layers. [less ▲]

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See detailRecension de l'ouvrage de Daniel Panis, "Il y a le il y a. L'énigme de Heidegger"
Steinmetz, Rudy ULg

in Espaces de liberté (1994)

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See detailIGF-I and IGFBP-3 increase independently of testosterone release during the onset of puberty in cattle
Renaville, Robert ULg; Sneyers, Myriam; Massart, Serge et al

in Growth Regulation (1994), 4(suppl 1), 116

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See detailEvaluation d’une expérience de rénovation de l’enseignement fondamental: Méthodologie de recherche
Piéron, Maurice; Cloes, Marc ULg; Delfosse, Catherine

in Revue de l'Education Physique (1994), 34(2-3), 117-120

Un projet pédagogique de l'envergure de celui qui fut mis en place dans l'enseignement fondamental de la Communauté française de Belgique exige que l'on considère les effets possibles sous de multiples ... [more ▼]

Un projet pédagogique de l'envergure de celui qui fut mis en place dans l'enseignement fondamental de la Communauté française de Belgique exige que l'on considère les effets possibles sous de multiples éclairages. Par les personnes auxquelles il s'adresse, par la diversité de ces effets et par l'organisation qu'il requiert, par la nécessité de mettre en évidence les relations de causalité, il a nécessité une méthodologie d'évaluation multidimensionnelle. ... [less ▲]

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See detailTHERMAL-CONDUCTIVITY OF PURE OR IRON-DOPED YBA2CU3O7-DELTA WITH OR WITHOUT AN EXCESS OF CUO
Houssa, M.; Bougrine, Hassan ULg; Ausloos, Marcel ULg et al

in Journal of Physics : Condensed Matter (1994), 6(31), 6305-6316

The thermal conductivities of YBa2(Cu1-xFex)3O7-delta + y% CuO ceramics for 0 < x < 0.03 and 0 < y < 5 have been measured. The thermal conductivities of all samples exhibit a minimum in the vicinity of ... [more ▼]

The thermal conductivities of YBa2(Cu1-xFex)3O7-delta + y% CuO ceramics for 0 < x < 0.03 and 0 < y < 5 have been measured. The thermal conductivities of all samples exhibit a minimum in the vicinity of the critical temperature T(c) and a maximum near T(c)/2. These results are interpreted with the help of an electronic model, i.e. supposing that the main contribution to the thermal conductivity below T(c) is due to electron scattering in the CuO2 planes. Within a simple two-fluid model derived from kinetic theory, taking into account the temperature dependence of the electronic relaxation time and the normal charge carrier concentration, we obtain theoretical curves which reproduce the experimental results quite well. We also take into account the porosity of the samples (in term of an intergrain contribution) to derive the electronic thermal conductivity. The parameter values of the model and the observed minimum are explained in terms of physical properties. In particular, the contribution of superconductivity fluctuations to the thermal conductivity is shown to be negligible with respect to other mechanisms. [less ▲]

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See detailComparison of Reproductive Performance in Belgian Dairy and Beef Cattle
Hanzen, Christian ULg; Laurent, Y.; Ward, W. R.

in Theriogenology (1994), 41(5), 1099-114

A computerized program was written to collect, evaluate and compare reproductive performance data of 2004 beef (Belgian Blue breed) and 1649 dairy (Friesian Holstein and German Red) cattle in 35 Belgian ... [more ▼]

A computerized program was written to collect, evaluate and compare reproductive performance data of 2004 beef (Belgian Blue breed) and 1649 dairy (Friesian Holstein and German Red) cattle in 35 Belgian herds (6 suckler beef herds, 9 milked beef herds and 20 dairy herds). Reproduction data were collected at monthly herd health visits. No difference in age at first calving was observed. Significant differences were observed among the 3 kinds of herds, and the best results were obtained in dairy herds for the calving interval, interval from calving to the first estrus, interval from calving to the first service and average number of days open. Concerning these parameters, first calvers had lower results than multiparous cows, mainly in suckler and milked beef herds. Significant differences were noted in the number of services per pregnancy. Heifers that had never calved presented the highest fertility. Primiparous beef cows had higher fertility than pluriparous cows. In dairy herds, pluriparous cows had higher fertility than primiparous cows. Estrus detection was better in milked beef herds than in suckled beef and dairy herds. Suckled beef herds had the lowest incidence of metritis and ovarian cysts of the three types of herds. Rates of abortion, overall culling and retained fetal membranes were similar in all the herds. The percentage of animals removed for infertility was highest in milked beef herds and lowest in dairy herds. Because 90% of the 1159 calvings recorded in the beef herds required a caesarean section, the reproductive performance of beef cattle represent results after caesarean section. [less ▲]

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See detailGalectins: a family of animal beta-galactoside-binding lectins.
Barondes, S. H.; Castronovo, Vincenzo ULg; Cooper, D. N. et al

in Cell (1994), 76(4), 597-8

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See detailBovine Growth Hormone-Taqi Rflp And Quantitative Traits Breed Selected For Growth Performances And Meat Production
Sneyers, M.; Renaville, Robert ULg; Falaki, M. et al

in Archives Internationales de Physiologie, de Biochimie et de Biophysique (1994), 102(2),

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