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See detailPd-Ag/SiO2 sol-gel catalysts designed for selective conversion of chlorinated alkanes into alkenes
Heinrichs, Benoît ULg; Delhez, Patrice; Schoebrechts, Jean-Paul et al

in Studies in Surface Science and Catalysis (1998), 118

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See detailContrôle de la qualité des pommes par vision artificielle.
Leemans, Vincent ULg; Magein, Hugo ULg; Destain, Marie-France ULg

in Fruit Belge (1998), 66(471),

Article de vulgarisation à destination des profesionnels du secteur fruitier, présentant les possibilités de l'analyse d'images numériques pour le tri des fruits suivant leur qualité externe

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See detailComment j'explore ... un sujet avec une concentration basse de cholesterol HDL.
Scheen, André ULg

in Revue Médicale de Liège (1998), 53(11), 711-4

A decrease in plasma HDL cholesterol concentration is considered as a major cardiovascular risk factor and is a prevalent lipid abnormality among patients with coronary heart disease. This condition is ... [more ▼]

A decrease in plasma HDL cholesterol concentration is considered as a major cardiovascular risk factor and is a prevalent lipid abnormality among patients with coronary heart disease. This condition is most often observed in the presence of hypertriglyceridaemia, generally linked to the insulin resistance syndrome, but may also be associated to elevated LDL cholesterol level or even be present alone (hypoalphalipoproteinaemia). The decision to treat a patient with low HDL level depends on the individual overall cardiovascular risk which should be evaluated as carefully as possible. The investigation should look for causes which may favour this metabolic condition, such as bad life habits or possible pharmacological interferences. [less ▲]

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See detailComment j'explore ... les pathologies thyroidiennes par cytoponction echoguidee.
Meunier, Paul ULg; Lebrun, Yves ULg; Quatresooz, Pascale ULg et al

in Revue Médicale de Liège (1998), 53(12), 784-787

From a retrospective study of 259 files, the authors stress the value of US-guided thyroid cytoponction and its essential role in case of thyroid cancer suspicion. This very specific and inexpensive ... [more ▼]

From a retrospective study of 259 files, the authors stress the value of US-guided thyroid cytoponction and its essential role in case of thyroid cancer suspicion. This very specific and inexpensive method fits perfectly into the other exploration techniques. It is the deciding factor in the thyroid nodule differential diagnostic and therapeutic planning. [less ▲]

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See detailAn extension of the radial return algorithm to account for rate-dependent effects in frictional contact and visco-plasticity
Ponthot, Jean-Philippe ULg

in Journal of Materials Processing Technology (1998), 80-1

This paper deals with unified elasto-plastic and elastic-visco-plastic constitutive equations for metals submitted to large deformations. We present here a newly developed time integration algorithm which ... [more ▼]

This paper deals with unified elasto-plastic and elastic-visco-plastic constitutive equations for metals submitted to large deformations. We present here a newly developed time integration algorithm which is an extension to the visco-plastic range of the classical radial return algorithm for plasticity. The resulting implicit algorithm is both efficient and very inexpensive. This algorithm is also subsequently extended to frictional problems where it allows a generalisation of the classical Coulomb dry friction criterion to a criterion depending on the relative slip velocity such as those encountered in the hydrodynamic regime. (C) 1998 Elsevier Science S.A. All rights reserved. [less ▲]

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See detailDistribution of vortex lattice melting temperatures in mixed state diagram of Bi2212 tapes
Pekala, M.; Bougrine, Hassan ULg; Gadomski, W. et al

in Physica C (1998), 303(3-4), 169-176

The electrical resistivity in the mixed state of Bi2212 tape superconductors can be accurately reconstructed for values below approximately a half of the normal state value of resistivity, assuming a ... [more ▼]

The electrical resistivity in the mixed state of Bi2212 tape superconductors can be accurately reconstructed for values below approximately a half of the normal state value of resistivity, assuming a Gaussian distribution for the vortex lattice melting temperatures. The magnetic field dependences of the distribution width and of the dB(c2)/dT parameter were calculated. Moreover the vortex liquid viscosity coefficient was determined between the vortex lattice melting temperature and T-c at various magnetic fields. It is pointed out that the vortex lattice melting transition should not be confused with the irreversibility line of magnetic studies nor with the percolation temperature line for electrical resistivity. (C) 1998 Elsevier Science B,V. All rights reserved. [less ▲]

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See detailTrophic relationships within intertidal communities of the Brittany coast: a stable carbon isotope analysis
Dauby, Patrick ULg; Khomsi, Ahmid; Bouquegneau, Jean-Marie ULg

in Journal of Coastal Research (1998), 14

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See detailIntérêt de l'évaluation fonctionnelle du patient lombalgique fréquentant une école du dos
Vanderthommen, Marc ULg; Drosson, C.; TOMASELLA, Marco ULg et al

in Kiné Acta-Symposium (1998)

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See detailLes institutions gériatriques entre rationalisation et subjectivation
Vrancken, Didier ULg

in Prévenir (1998), 35(2), 41-48

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See detailFree Movement of Persons in the European Union - D. Martin & E. Guild
Martiniello, Marco ULg

in International Migration Review (1998), 32(4), 1084-1085

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See detailIsotopic constraints on the Cenozoic evolution of the carbon cycle
François, Louis ULg; Godderis, Y.

in Chemical Geology (1998), 145(3-4), 177-212

In the last few years, several models have been built to explore the Cenozoic evolution of the carbon and strontium cycles. Of particular interest is the study of the impact on the carbon cycle of major ... [more ▼]

In the last few years, several models have been built to explore the Cenozoic evolution of the carbon and strontium cycles. Of particular interest is the study of the impact on the carbon cycle of major mountain uplifts such as the Himalayan orogeny. To explain the Cenozoic increase in the measured seawater strontium isotopic ratio, it was recently proposed that the Himalyan uplift could be responsible for an enhanced consumption of atmospheric CO2 by continental silicate weathering. Here, a new model of the carbon cycle evolution over Cenozoic times is presented. It calculates the various fluxes involved in the organic and inorganic components of the carbon cycle from the seawater delta C-13, the biological isotopic fractionation in the ocean and the seafloor spreading rate. The model equilibrates the budgets of the carbon and alkalinity cycles on the million year timescale, assuming as many previous investigators that the system remains close to equilibrium. The validity of this equilibrium approximation is examined critically. Various sensitivity experiments are performed in order to test the impact of the model parameters on the results. The calculated history of the carbonate deposition rate is consistent with the available reconstruction. The continental silicate weathering rate calculated by the model appears to be widely insensitive to the model parameters, showing three distinct evolutions over the Cenozoic. The model indeed suggests a time of relative constancy of the silicate weathering flux before 40 Ma, followed by a period of slow decrease until 15 Ma and finally a marked increase up to the present. In a progressively cooler world, this evolution may be interpreted as a change from a 'chemically' controlled to a 'physically' controlled weathering regime. The evolution of continental silicate weathering thus partly appears decoupled from the increase in the observed seawater strontium isotopic ratio. For this reason, the evolution of the calculated riverine Sr-87/ Sr-86 ratio shows a strong increase over the Cenozoic, from about 0.710 to 0.712. However, this increase may largely be reduced by considering the recycling of a pelagic carbonate reservoir increasing over the Cenozoic or by assuming that seafloor basalt weathering is a CO2- or climate-dependent process. (C) 1998 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailEtude radiologique de l’os naviculaire normal. Partie 1: que penser des canaux sésamoïdiens du bord distal
Gabriel, Annick ULg; Jolly, S.; Detilleux, Johann ULg et al

in Annales de Médecine Vétérinaire (1998), 142

The scoring system based on the different types of navicular distal border canals is a good method to quantify and relativise the anomalies in number, shape and localisation of the canals. The distal ... [more ▼]

The scoring system based on the different types of navicular distal border canals is a good method to quantify and relativise the anomalies in number, shape and localisation of the canals. The distal border score varies significantly with the limb (fore or rear), the morphological type, the gender and the age of the horse. These anatomical variations are of importance and must be taken into account when examining a suspect bone. The score is larger for the fore navicular bone than for the rear. It could be interesting to compare both scores: rear navicular bone score is generally equal to half (or slight less) that of the fore. The score is larger for heavy types of horses and ponies (drafthorse, heavy halfbreds and Fjords). This phenomenon could be related to a larger pressure within the distal interphalangeal joint. The score is lower for the athletic half bred than for other halfbreds. This could be the result of the changes in bone architecture induced by exercise and particularly bone densification. The score is lower for the female than for the male. We think that navicular bone quality is better for the female and this idea corroborates that of other authors that consider that the risk to develop navicular disease is smaller for the female than for the male. The score increases with age. it is particularly small in young horses less than two years old and then increases strongly. This phenomenon is to be related to the progressive development, in the first year of life, of the groove between articular cartilage and distal impar ligament, canals developping only later one. In athletic horses, the score is higher between 7 and 12 years of age. During this time, we also observe more degenerative changes within the navicular bone, which could mean that bone is of lesser quality. [less ▲]

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See detailPrécipitations atmosphériques et altitude. Prélude à une cartographie des montants annuel et mensuels en Belgique
Alexandre, Jean ULg; Erpicum, Michel ULg; Mabille, Georges ULg et al

in Publications de l'Association Internationale de Climatologie (1998), 11

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See detailPhosphorylation of Proteins Induced in a Murine Pre-T Cell Line by Neurohypophysial Peptides
Martens, Henri ULg; Kecha, O.; Charlet-Renard, C. et al

in Advances in Experimental Medicine and Biology (1998), 449

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See detailLa neuropathie diabetique: donnees epidemiologiques et predictives.
Scheen, André ULg

in Diabètes & Métabolism (1998), 24 Suppl 3

Neuropathy is a classical complication of diabetes mellitus, to the same extent as micro- and macroangiopathy. Diabetic neuropathy can be schematically divided into peripheral neuropathy, especially in ... [more ▼]

Neuropathy is a classical complication of diabetes mellitus, to the same extent as micro- and macroangiopathy. Diabetic neuropathy can be schematically divided into peripheral neuropathy, especially in the lower limbs (distal polyneuropathy), and autonomic neuropathy, present in all systems (cardiovascular, gastrointestinal, urogenital and even pulmonary abnormalities). Detection should be based on an oriented anamnesis and a careful physical examination. Complementary exams may be performed in order to confirm the diagnosis and assess the severity of the neuropathy. While the diagnosis of peripheral neuropathy is essentially based on clinical examination, that of autonomic neuropathy has been markedly facilitated by simple standardised tests for early detection of cardiac autonomic neuropathy. Depending on the terminology, the diagnostic criteria and the characteristics of the population, the prevalence of diabetic neuropathy can range from 15 to 100%. However, all studies agree that prevalence is important in both types of diabetes (Type 1 and Type 2), that it increases with age and disease duration, and that it is inversely related to the quality of glycaemic control. Detection of neuropathy is an essential step in the clinical approach to diabetic patients, mainly because of the prognosis linked to such a diagnosis, at both an early and late stage of the disease. Once neuropathy is diagnosed, the physician should provide specific advice to diabetic patients in order to prevent possible dramatic complications. [less ▲]

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See detailPeatlands of Wallony (S-Belgium)
Frankard, Philippe; Ghiette, Pascal; Hindryckx, Marie-Noëlle ULg et al

in Suoseura - Finnish Peatland Society (1998), 49(2), 33-47

Various types of peatlands are present in Wallony: raised bogs, oligotrophic and rich fens, wet heaths, marshy woodlands. Many areas have been degraded by past and recent human activities. Much attention ... [more ▼]

Various types of peatlands are present in Wallony: raised bogs, oligotrophic and rich fens, wet heaths, marshy woodlands. Many areas have been degraded by past and recent human activities. Much attention is now devoted to their protection, scientific study and ecological management. Besides their exceptional biological and ecological interest, they are among the last natural spaces in a very urbanised country like Belgium. [less ▲]

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See detailHemovigilance: Clinical Tolerance of Solvent-Detergent Treated Plasma
Baudoux, Etienne ULg; Margraff, U.; Coenen, Alain ULg et al

in Vox Sanguinis (1998), 74(Suppl 1), 237-9

OBJECTIVE: This study was conducted to assess retrospectively the clinical tolerance of SD treated plasma and to compare it to other labile blood products (red blood cell and platelet concentrates ... [more ▼]

OBJECTIVE: This study was conducted to assess retrospectively the clinical tolerance of SD treated plasma and to compare it to other labile blood products (red blood cell and platelet concentrates). METHODS: Adverse events (AEs) related to the use of blood products at the Blood Transfusion Center (BTC) are routinely collected through a formalised system of hemovigilance. All AEs reported are entered into a safety data base which was used for the study. All AEs reported during a one-year period to the BTC were retrospectively re-assessed and descriptive statistics calculated. RESULTS: 5064 units of SD treated plasma were transfused to 894 recipients during the study period at the occasion of 1553 transfusions. No AE associated to SD treatment plasma was reported during that period. In contrast, during the same period, 485 AEs associated with the use of red blood cell concentrates (RBCC) were reported in 251 patients at the occasion of 262 transfusions. 2.1% (251/11,748) of the patients transfused with RBCC experienced one or more AEs. The incidence of AEs per unit transfused was 1.3% (485/37,332), and 2.4% (485/20,460) of RBCC transfusions were associated with one or more AEs. 142 AEs associated with the use of platelet concentrate (PC) were observed in 69 patients at the occasion of 73 transfusions. 4.2% (69/1645) of patients transfused with PC experienced one or more AEs. The incidence of AEs per unit transfused was 1.1% (142/12,772), and 2.8% (142/5034) of PC transfusions were associated with one or more AEs. All reported AEs were classified and non serious. The most frequently observed AEs were fever, chills and rashes which accounted for roughly 64% of all reported AEs. CONCLUSION: As for the overall clinical tolerance of red cell and platelet concentrates, the results of this study are in complete agreement with the published literature. The study also confirms the extremely good tolerability of SD treated plasma in comparison with other labile blood products. [less ▲]

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See detailcompte rendu de : Christian Nicolas, Utraque lingua. Le calque sémantique : domaine gréco-latin
Rochette, Bruno ULg

in Babel : Revue Internationale de la Traduction = International Journal of Translation (1998), 44(3), 282-284

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See detailA theoretial investigation of neutral francium
Biémont, Emile ULg; Quinet, Pascal ULg; Van Renterghem, V.

in Journal of Physics : B Atomic Molecular & Optical Physics (1998), 31

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See detailFonction et signification de l'image égyptienne
Laboury, Dimitri ULg

in Bulletin de la Classe des Beaux-Arts de l'Académie Royale de Belgique, 6e série (1998), IX

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See detailLa notion de texte chez Hjelmslev
Badir, Sémir ULg

in Texto! (1998)

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See detailThe Current N-15-Leucine Infusion Technique Is Not Suitable For Quantitative Measurements Of Ileal Endogenous Amino Acid Flows In Pigs
Leterme, Pascal; Seve, Bernard; Thewis, André ULg

in Journal of Nutrition (1998), 128(11), 1961-1968

The current 15N-leucine infusion technique may overestimate the ileal endogenous nitrogen losses in pigs. To determine the reason, we infused four cannulated pigs intravenously, fed them a pea-based diet ... [more ▼]

The current 15N-leucine infusion technique may overestimate the ileal endogenous nitrogen losses in pigs. To determine the reason, we infused four cannulated pigs intravenously, fed them a pea-based diet with 15N-leucine, and examined some methodological variables. Neither the blood sampling time nor the choice of precursor pool (total N or amino acid N of deproteinized plasma) or the method of estimation of the isotopic equilibrium level significantly affected the results. On the other hand, the 15N-enrichment of purified mucin, isolated from ileal digesta, was higher than that of the plasma amino acid pool (0.114 vs. 0.077 atom % excess). The endogenous proportion of the labeled amino acids (Ala, Gly, Ile, Leu and Val) in the ileal digesta ranged from 23 (Leu) to 74% (Ala), compared with 70% for total N. The low value of leucine was ascribed to the constant marker infusion condition. In pigs infused with 13C-leucine, a similar endogenous proportion was obtained for lumenal leucine with 13C-leucine and 15N-leucine infusion. However, the 13C-enrichment of the leucine bound to mucin was markedly lower than that of plasma leucine (38%). The endogenous amino acid flows were also estimated by combining the ileal N flow measured with 15N and the endogenous amino acid profile obtained by means of an N-free diet. They were different from those obtained with the 15N-amino acid dilution technique. We conclude that the precursor pool currently used (plasma total N or total a-amino acid N pools) is a poor indicator of the enrichment of the secretions and that the infusion of one labeled amino acid is not sufficient to extend the method at the amino acid level. [less ▲]

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See detailReproducibility and diagnostic sensitivity of ultrasonometry of the phalanges to assess osteoporosis.
Reginster, Jean-Yves ULg; Dethor, M; Pirenne, H et al

in International Journal of Gynecology & Obstetrics (1998), 63(1), 21-8

OBJECTIVE: The present study was designed to assess the reproducibility and the diagnostic sensitivity of the amplitude-dependent speed of sound (SoS) at the distal metaphysis of the proximal phalanges ... [more ▼]

OBJECTIVE: The present study was designed to assess the reproducibility and the diagnostic sensitivity of the amplitude-dependent speed of sound (SoS) at the distal metaphysis of the proximal phalanges. METHOD: Fourteen presumably healthy volunteers were repeatedly measured every 6 weeks for approximately 6 months in order to assess the reproducibility of the SoS of the phalanges. We recruited 91 post-menopausal women, aged 55-75 years, who were divided in three groups according to their lumbar bone mineral density (BMD) and the existence of prevalent vertebral fractures. The objective was to evaluate the diagnostic sensitivity of SoS measurements. We used DBM Sonic 1200 equipment, and assessed the velocity at which US cross the phalanx in a lateral-medial direction. In post-menopausal women, BMD was measured by dual energy X-ray absorptiometry (DXA) at the level of the lumbar spine, the total zone of the non-dominant hip and the femoral neck zone of the non-dominant hip. RESULTS: The precision of the SoS measurements was 0.71+/-0.05% (mean+/-S.E.M) whereas the reproducibility was 0.95+/-0.06%. Subjects with low BMD or prevalent fractures had significantly lower values of SoS (P < 0.001) than the controls. ROC curve analysis applied to the study population confirmed that SoS was able to discriminate between the controls and osteoporotic subjects (area under the ROC curves were 0.82 (low bone mineral density) and 0.85 (prevalent fractures), respectively). Hip BMD was found to be the most significant variable when comparing the controls and the low density patients by stepwise discrimination and SoS significantly improved the discrimination between the groups when added to the hip BMD. The hip BMD was again the most discriminant variable when applying the same techniques to controls and patients with prevalent fractures, followed by SoS and lumbar BMD. A cut-off value of 1881 m/s is defined for SoS by logistic discrimination and likelihood ratio function. With this value, the sensitivity and the specificity for SoS used in the diagnosis of established osteoporosis were, 81.5% and 79.3%, respectively. Sensitivity and specificity were significantly improved when combining ultrasonometry and densitometry. CONCLUSION: Measurement of ultrasound velocity at the phalanges appears to be a precise and reproducible technique. SoS discriminates between normal post-menopausal women and patients with either low lumbar BMD or prevalent fractures to the same extent as BMD measurements. [less ▲]

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See detailLa gestion biologique d'une decharge.
Thonart, Philippe ULg; Steyer, Emmanuel; Drion, Raphael et al

in Tribune de l'Eau (La) (1998), 590/591

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See detailLe monticule frasnien de la carrière du Nord à Frasnes (Belgique): sédimentologie, stratigraphie séquentielle et coraux
Boulvain, Frédéric ULg; Coen-Aubert, M.

in Professional Paper Belgian Geological Survey (1998), 285

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See detailEquine neutrophil myeloperoxidase in plasma: design of a radio-immunoassay and first results in septic pathologies.
Deby, Ginette ULg; Grulke, Sigrid ULg; Caudron, I. et al

in Veterinary Immunology and Immunopathology (1998), 66(3-4), 257-71

The strangulated intestinal pathologies of horses are accompanied by a local activation of the neutrophils, that can be revealed by measuring the tissular enzymatic activity of the granulocytic enzyme ... [more ▼]

The strangulated intestinal pathologies of horses are accompanied by a local activation of the neutrophils, that can be revealed by measuring the tissular enzymatic activity of the granulocytic enzyme myeloperoxidase (MPO). To estimate the possible spreading of this neutrophil activation to the systemic circulation, we designed a radioimmunoassay (RIA) for equine neutrophil myeloperoxidase (MPO) (EC 1.11.1.7) using a specific rabbit antiserum. MPO was labeled with 1 mCi 125I by a technique of self-labeling in the presence of 10(-4) M hydrogen peroxide. The RIA was performed by incubation of 100 microl diluted antiserum, 100 microl labeled MPO (+/-30,000 cpm) and 100 microl of the reference molecule (unlabeled MPO) solution or the unknown sample, at room temperature for 18 h. The antibody-antigen complexes were isolated by double antibody precipitation. The sensitivity of the RIA was 2 ng/ml. The RIA showed good precision and accuracy with intra- and inter-assay coefficients of variation 6% and 8%, respectively, for MPO concentrations ranging from 2 ng/ml to 60 ng/ml. The best sampling technique for MPO measurement in plasma was to collect blood into EDTA, which allowed us to get a plasmatic value stable with time. The mean MPO value in normal horses was 69.5 +/- 19.4 ng/ml in EDTA anticoagulated plasma (n = 48). The stress of transport and anaesthesia did not modify the mean plasmatic value of MPO. No significant increase of plasma MPO was observed in 17 horses submitted to surgery for pathologies without systemic impact. But, in 25 horses with obstructive intestinal pathologies, persistent abnormal MPO concentrations were measured (until 740 ng/ml). [less ▲]

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See detailRedshift estimate of a gravitational lens from the observed reddening of a multiply imaged quasar
Jean, C.; Surdej, Jean ULg

in Astronomy and Astrophysics (1998), 339

Light rays from a multiply imaged quasar usually sample different path lengths across the deflector. Extinction in the lensing galaxy may thus lead to a differential obscuration and reddening between the ... [more ▼]

Light rays from a multiply imaged quasar usually sample different path lengths across the deflector. Extinction in the lensing galaxy may thus lead to a differential obscuration and reddening between the observed macro-lensed QSO images. These effects naturally depend on the precise shape of the extinction law and on the redshift of the lens. By means of numerical Monte-Carlo simulations, using a least-squares fitting method and assuming an extinction law similar to that observed in the Galaxy, we show how accurate photometric observations of multiply imaged quasars obtained in several spectral bands could lead to the estimate of the lens redshift, irrespective of the visibility of the deflector. Observational requirements necessary to apply this method to real cases are thoroughly discussed. If extinction laws turn out to be too different from galaxy to galaxy, we find out that more promising observations should consist in getting high signal-to-noise low resolution spectra of at least three distinct images of a lensed quasar, over a spectral range as wide as possible, from which it should be straightforward to extract the precise shape of the redshifted extinction law. Very high signal-to-noise, low spectral resolution, VLT observations of H 1413+117 and <ASTROBJ>MG 0414+0534</ASTROBJ> should enable one to derive such a redshifted extinction law. [less ▲]

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See detailAccuracy and feasibility of contrast echocardiography for detection of perfusion defects in routine practice: comparison with wall motion and technetium-99m sestamibi single-photon emission computed tomography. The Nycomed NC100100 Investigators.
Marwick, T. H.; Brunken, R.; Meland, N. et al

in Journal of the American College of Cardiology (1998), 32(5), 1260-9

OBJECTIVES: We sought to assess the feasibility and accuracy of myocardial contrast echocardiography (MCE) using standard imaging approaches for the detection of perfusion defects in patients who had a ... [more ▼]

OBJECTIVES: We sought to assess the feasibility and accuracy of myocardial contrast echocardiography (MCE) using standard imaging approaches for the detection of perfusion defects in patients who had a myocardial infarction (MI). BACKGROUND: Myocardial contrast echocardiography may be more versatile than perfusion scintigraphy for identifying the presence and extent of perfusion defects after MI. However, its reliability in routine practice is unclear. METHODS: Fundamental or harmonic MCE was performed with continuous or triggered imaging in 203 patients with a previous MI using bolus doses of a perfluorocarbon-filled contrast agent (NC100100). All patients underwent single-photon emission computed tomography (SPECT) after the injection of technetium-99m (Tc-99m) sestamibi at rest. Quantitative and semiquantitative SPECT, wall motion and digitized echocardiographic data were interpreted independently. The accuracy of MCE was assessed for detection of segments and patients with moderate and severe sestamibi-SPECT defects, as well as for detection of patients with extensive perfusion defects (>12% of left ventricle). RESULTS: In segments with diagnostic MCE, the segmental sensitivity ranged from 14% to 65%, and the specificity varied from 78% to 95%, depending on the dose of contrast agent. Using both segment- and patient-based analysis, the greatest accuracy and proportion of interpretable images were obtained using harmonic imaging in the triggered mode. For the detection of extensive defects, the sensitivity varied from 13% to 48%, with specificity from 63% to 100%. Harmonic imaging remained the most accurate approach. Time since MI and SPECT defect location and intensity were all determinants of the MCE response. The extent of defects on MCE was less than the extent of either abnormal wall motion or SPECT abnormalities. The combination of wall motion and MCE assessment gave the best balance of sensitivity (46% to 55%) and specificity (82% to 83%). CONCLUSIONS: Although MCE is specific, it has limited sensitivity for detection of moderate or severe perfusion defects, and it underestimates the extent of SPECT defects. The best results are obtained by integration with wall motion. More sophisticated methods of acquisition and interpretation are needed to enhance the feasibility of this technique in routine practice. [less ▲]

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See detailLa place du diagnostic dans l'approche familiale
Garcet, Serge ULg

in Revue des Psychologues et Psychiatres de l'AIGS (1998), 1

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See detailbébé prématuré, bébé particulier ? Quel suivi développemental ?
Battisti, Oreste ULg; François, A.; Bertrand, J. M. et al

in Archives de Pédiatrie (1998), 5

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See detailOsteochondrosis lesion of the lombo-sacral joint in a mastiff
Snaps, Frédéric ULg; Heimann, M.; Saunders, J. et al

in Veterinary Record : Journal of the British Veterinary Association (1998), 143(17), 476-477

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See detailEffect of ambient water temperature on sex determinism in the blue tilapia Oreochromis aureus
Desprez, Damien; Mélard, Charles ULg

in Aquaculture (1998), 162

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See detailTranscription factor AP1 is involved in basal and okadaic acid-stimulated activity of the human PRL promoter
Caccavelli, Laure; Manfroid, Isabelle ULg; Martial, Joseph ULg et al

in Molecular Endocrinology (Baltimore, Md.) (1998), 12(8), 1215-27

The tumor promoter, okadaic acid (OA), an inhibitor of protein phosphatases, stimulates the activity of the human PRL (hPRL) proximal promoter. We analyzed in detail the effects of OA on transcription ... [more ▼]

The tumor promoter, okadaic acid (OA), an inhibitor of protein phosphatases, stimulates the activity of the human PRL (hPRL) proximal promoter. We analyzed in detail the effects of OA on transcription factor binding to elements P1 and P2 of this promoter, sequences known to contain at least one Pit-1 binding site each. OA treatment induces binding of an AP1-related transcription factor to the P1 site. This effect is specific, as protein binding to the P2 site is not altered by the treatment. Specific antibodies were used to confirm that the OA-induced complex is related to AP1 and to show that it contains JunD and c-fos, but not Pit-1. The increase in AP1 binding to P1 and to a canonical AP1 site correlates to an increase in cellular JunD and c-fos content. Transient transfection experiments showed that both AP1 and Pit-1 are involved in the regulation of basal and OA-stimulated promoter activity. Our results demonstrate that a member of the AP1 family, containing JunD and c-fos, can bind to the proximal element P1 within the hPRL promoter. In addition, they show that AP1 is involved in both basal and OA-stimulated expression of the hPRL gene. [less ▲]

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See detailPopular Modernism and The American Prose Poem : From Sherwood Anderson to Kenneth Patchen
Delville, Michel ULg

in The Prose Poem : an International Journal (1998), 7

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See detailNéoplasie mammaire plurifocale en généralisation osseuse
Blocklet, Didier; Seret, Alain ULg; Schoutens, André

in Revue Médicale de Bruxelles (1998), 19

Clinical case.

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See detailHow robust are district health systems? Coping with crisis and disasters in Rutshuru, Democratic Republic of Congo.
Porignon, Denis ULg; Soron'Gane, E. M.; Lokombe, T. E. et al

in Tropical medicine & international health : TM & IH (1998), 3(7), 559-65

BACKGROUND: Since the eighties, the North Kivu Province socio-economic environment has been deteriorating. This province also faced an influx of Rwandan refugees in July 1994. The objective of the paper ... [more ▼]

BACKGROUND: Since the eighties, the North Kivu Province socio-economic environment has been deteriorating. This province also faced an influx of Rwandan refugees in July 1994. The objective of the paper is to show how a rural health district has been able to adjust and maintain its medical activities under unfavourable conditions. METHOD: Performances of the local health system were assessed through the analysis of routine medical data collected in the Rutshuru Health District (RHD) between 1985 and 1995. Specific data collected during the Rwandan refugee crisis measured the workload of RHD due to the refugees. RESULTS: For 11 years, health infrastructures have remained accessible and functional in RHD. The curative utilization and preventive coverage rates increased. Obstetrical activities were intensified from a quantitative as well as from a qualitative point of view. Between July and October 1994, the RHD treated 65000 cases of various pathological conditions in Rwandan refugees settled outside the camps. This corresponds to 9.3% of consultations for Rwandan refugees settled on RHD's territory and represents a 400% increase in the curative workload for the RHD health services. Human and financial resources remained at a very low level, especially when compared with those available in the camps through relief agencies. CONCLUSION: The RHD was severely affected by various stresses but its services managed to provide significant and efficient response to these crises. Health district systems may constitute an effective tool to provide health care under adverse conditions. [less ▲]

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See detailUse of a variable incidence angle PIXE arrangement for studying pigment multilayers
Weber, Georges ULg; Delbrouck, J. M.; Strivay, David ULg et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (1998), 139(1-4), 196-201

Particle induced X-ray emission (PIXE) method is used in the field of archeometry and specially to investigate pigment colored multilayers. The tilting of the sample with respect to the incident proton ... [more ▼]

Particle induced X-ray emission (PIXE) method is used in the field of archeometry and specially to investigate pigment colored multilayers. The tilting of the sample with respect to the incident proton beam direction allows to modify the relative contribution of each layer to the fluorescence signal. The experimental results coupled to computer simulations lead to semi-quantitative information about the thickness, the position and the composition of the successive layers. (C) 1998 Elsevier Science B.V. [less ▲]

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See detailL’Entérocolite Epizootique du Lapin
Marlier, Didier ULg; Vindevogel, Henri ULg

in Annales de Médecine Vétérinaire (1998), 142

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See detailConditioned sensitization to the behavioural effects of amphetamine and habituation to the testing context
Tirelli, Ezio ULg; Terry, P.

in Behavioural Pharmacology (1998), 10

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See detailDestabilization Of A Model Membrane By A Predicted Fusion Peptide Of Fertilin Alpha
Schanck, A.; Brasseur, Robert ULg; Peuvot, J.

in Journal de Chimie Physique et de Physico-Chimie Biologique (1998), 95(2), 467-73

The subunit a of the guinea pig fertilin (previously known as PH-30, an integral membrane protein involved in sperm-egg binding and fusion) is predicted to be a potential fusion protein.The structure of ... [more ▼]

The subunit a of the guinea pig fertilin (previously known as PH-30, an integral membrane protein involved in sperm-egg binding and fusion) is predicted to be a potential fusion protein.The structure of this putative fusion protein was analysed by molecular modeling and we have found a peptidic sequence of 17 residues (D83-P99) organized in helix that inserts obliquely in lipid phases. The effect of ths synthesized peptide was studied on a model membrane by 3lP NMR and light scattering. It appears to increase the size of lipid vesicles and induces structural odifications. We interpret these observations as a destabilization of the lipid organization by this peptide because of its tilted insertion in phospholipid layers. This destabilization could favor membrane fusion. [less ▲]

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See detailDe paardenstalfetisjist
Meesters, Gert ULg

in Over Taal (1998), 37(1), 16-18

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See detailConstruction de tarifs de cubage d'arbres pour l’aulne glutineux (Alnus glutinosa (L.) Gaertn.).
Thibaut, André; Rondeux, Jacques ULg; Claessens, Hugues ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1998), 2(3), 203-213

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See detailLe cas clinique du mois. Association d'une maladie de Hodgkin et d'un syndrome nephrotique.
Baron, Frédéric ULg; Hermanne, J. P.; Fassotte, Marie-France ULg et al

in Revue Médicale de Liège (1998), 53(11), 651-3

The nephrotic syndrome is a rare complication of Hodgkin's disease. The majority of the cases do not respond to corticosteroids but are cured by the treatment of the lymphoma. We describe a patient with a ... [more ▼]

The nephrotic syndrome is a rare complication of Hodgkin's disease. The majority of the cases do not respond to corticosteroids but are cured by the treatment of the lymphoma. We describe a patient with a nephrotic syndrome at the time of diagnosis of mixed cellularity Hodgkin's disease and the resolution of this nephrotic syndrome by MOPP-ABV chemotherapy. [less ▲]

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See detailIn vitro modulation of human gingival epithelial cell attachment and migration by minocycline-HCL.
Van Heusden, Alain ULg; Nusgens, Betty ULg; Goffinet, Gerhard ULg et al

in Journal of Periodontal Research (1998), 33(6), 377-85

Although the influence of tetracyclines on periodontal connective tissue cells has been the topic of many in vitro and in vivo studies, data regarding their effects on gingival epithelial cells are scarce ... [more ▼]

Although the influence of tetracyclines on periodontal connective tissue cells has been the topic of many in vitro and in vivo studies, data regarding their effects on gingival epithelial cells are scarce. The present in vitro study was designed to examine the influence of minocycline, a semi-synthetic analog of tetracycline, on human gingival keratinocyte (HGK) attachment and migration. Attachment tests were performed with HGK prelabeled by tritiated amino-acids. Increasing concentrations of minocycline (10, 50, 100 micrograms/ml) in the medium produced no significant modification of cell adhesion kinetics compared to control conditions, except for 100 micrograms/ml which statistically significantly (p < 0.05) reduced the number of attached cells beyond 6 h. A 24-h cell preincubation in 10 micrograms/ml of minocycline did not alter the kinetics of HGK attachment. Scanning electron microscopic observations of attached HGK showed that the presence of 10 micrograms/ml of minocycline in the "attachment medium" induced the production of multiple filopodial extensions. Migration tests in Boyden chambers for 40 h demonstrated that HGK preincubation for 24 h in a 10 micrograms/ml minocycline-HCl solution increased significantly (p < 0.005) cell migration towards a gradient of fetal calf serum. The presence of 10 micrograms/ml of minocycline in contact with the keratinocytes in the upper compartment of the migration chambers also produced a significant (p < 0.005) result. In contrast, the presence of minocycline in the lower compartments did not produce any chemoattractive effect. Within the limits of their significance, these results suggest that, at concentrations not beyond 50 micrograms/ml, minocycline could fasten the periodontal wound coverage by epithelial cells and allow the normal reformation of a junctional epithelium. [less ▲]

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See detailArbitrary Lagrangian-Eulerian formulation for element-free Galerkin method
Ponthot, Jean-Philippe ULg; Belytschko, Ted

in Computer Methods in Applied Mechanics & Engineering (1998), 152

Arbitrary Lagrangian-Eulerian (ALE) formulation of the Element Free Galerkin (EFG) method is presented. EFG is a meshless method for solving partial differential equations in which the trial and test ... [more ▼]

Arbitrary Lagrangian-Eulerian (ALE) formulation of the Element Free Galerkin (EFG) method is presented. EFG is a meshless method for solving partial differential equations in which the trial and test functions employed in the discretization process result from moving least square interpolants. The most significant advantage of the method is that it requires only nodes and a description of internal and external boundaries and interfaces, such as cracks, of the model: no element connectivity is needed. However, as for any discretization method, acceptable solutions can only be obtained for a sufficiently refined discretization. In dynamic fracture problems, where the crack path can be arbitrary, and is thus a priori unknown, this necessitates a refined discretization in large parts of the computational domain which can lead to prohibitive computation costs. ALE formulation allows to continuously relocate nodes on the computational domain. By combining EFG with ALE, it is thus possible, in a crack propagation problem, to refine locally the spatial discretization in the neighborhood of a propagating crack-tip. Results are presented for a wave propagation problem as well as for 2-D dynamic crack propagation problems. [less ▲]

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See detailLa communication dans la démocratie du 3e millénaire
Vromans, Joseph ULg

in Actes de la XXième Session de l'Institut d'Etudes Mondialistes (1998)

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See detailSTYLOSA and FISTULATA: regulatory components of the homeotic control of Antirrhinum floral organogenesis.
Motte, Patrick ULg; Saedler, H.; Schwarz-Sommer, Z.

in Development (1998), 125(1), 71-84

The identity and developmental pattern of the four organ types constituting the flower is governed by three developmental functions, A, B and C, which are defined by homeotic genes and established in two ... [more ▼]

The identity and developmental pattern of the four organ types constituting the flower is governed by three developmental functions, A, B and C, which are defined by homeotic genes and established in two adjacent whorls. In this report we morphologically and genetically characterise mutants of two genes, STYLOSA (STY) and FISTULATA (FIS) which control floral homeotic meristem- and organ-identity genes and developmental events in all floral whorls. The morphology of the reproductive organs in the first and second whorls of sty fis double mutant flowers indicate that the two genes are part of the mechanism to prevent ectopic expression of the C-function in the perianth of wild-type flowers. This is verified by the detection of the expansion of the expression domain of the class C gene PLENA (PLE) towards the perianth. Interestingly, in the second whorl of sty and fis mutants, spatial differences in stamenoid features and in the pattern of ectopic expression of the PLE gene were observed. This suggests that, with respect to the negative control of PLE, petals are composed of two regions, a lateral and a central one. Mutation in ple is epistatic to most of the sty/fis-related homeotic defects. PLE, however, is not the primary target of STY/FIS control, because dramatic reduction of expression of FIMBRIATA, meristem identity genes (FLORICAULA and SQUAMOSA) and of class B organ identity genes (GLOBOSA) occur before changes in the PLE expression pattern. We propose that STY/FIS are hierarchically high-ranking genes that control cadastral component(s) of the A-function. SQUAMOSA as a potential target of this control is discussed. Retarded growth of second whorl organs, subdivision of third whorl primordia and the failure to initiate them in sty/fis mutants may be mediated by the FIMBRIATA gene. [less ▲]

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See detailCommentaires sur les travaux du bureau ABC
Fecher-Bourgeois, Fabienne ULg

in Bulletin de Documentation du Ministère des Finances (1998), LVIIIè année, n°5(Septembre - octobre 1998),

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See detailJ.J.L. ten Kates 'Kind des Jammers': Thomas Chatterton in Nederland
Steyaert, Kris ULg

in Negentiende Eeuw (1998), 22(4), 235-250

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See detailA comparison between the TEC computed using GPS and ionosonde measurements
Warnant, René ULg; Jodogne, Jean-Claude

in Acta Geodaetica et Geophysica Hungarica (1998), 33(1), 147-153

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See detailPharma clinics. Comment je traite.... Certaines maladies metaboliques grace a une intervention pharmacologique ciblee sur l'intestin.
Scheen, André ULg

in Revue Médicale de Liège (1998), 53(11), 646-50

Besides the classical dietary regimen, it is possible to use specific pharmacological approaches, targeted at the intestine, in order to treat some metabolic disorders. Three approaches will be described ... [more ▼]

Besides the classical dietary regimen, it is possible to use specific pharmacological approaches, targeted at the intestine, in order to treat some metabolic disorders. Three approaches will be described: anionic resins for treating hypercholesterolaemia, alpha-glucosidase inhibitors for treating diabetes mellitus and reactive hypoglycaemia, and intestinal lipase inhibitors for treating obesity. All these drugs are based on original concepts, but their clinical use is often limited by the occurrence of digestive side-effects. The latter may generally be reduced by progressive and individual titration of the dosage of each drug and/or by following an appropriate diet. [less ▲]

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See detailRésistance bactérienne aux beta-lactamines
Charlier, Paulette ULg; Coyette, Jacques ULg; Dehareng, Dominique ULg et al

in Medecine Sciences : M/S (1998), 14(5), 544-555

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See detailLe syndrome X, a la croisee des maladies metaboliques et cardio-vasculaires.
Scheen, André ULg

in Revue Médicale de Liège (1998), 53(1), 29-32

The relationships between metabolic disorders and cardiovascular diseases are very strong. Hypercholesterolaemia and diabetes mellitus, for instance, are well-known risk factors. The multifaceted ... [more ▼]

The relationships between metabolic disorders and cardiovascular diseases are very strong. Hypercholesterolaemia and diabetes mellitus, for instance, are well-known risk factors. The multifaceted metabolic syndrome or syndrome X, originally described by Reaven in 1988, comprises several abnormalities which are associated to insulin resistance and compensatory hyperinsulinaemia. Syndrome X results in an increased vascular risk by at least two mechanisms. On the one hand, it favours atherosclerosis and is associated to angiographic lesions, especially in the coronary arteries. On the other hand, it is associated to endothelial dysfunction which may contribute to myocardial ischaemia even in presence of angiographically normal arteries, a phenomenon named also syndrome X by the cardiologists. Thus, metabolic syndrome X and cardiological syndrome X are very close and syndrome X may be considered as a crossing between metabolic disorders and cardiovascular diseases. [less ▲]

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See detailThe roles of time of day and sleep quality in modulating glucose regulation: clinical implications.
Scheen, André ULg; Van Cauter, E.

in Hormone Research (1998), 49(3-4), 191-201

Consistent variations in glucose regulation across the 24-hour cycle are present in normal subjects. These diurnal variations are altered in various states of impaired glucose tolerance (aging, obesity ... [more ▼]

Consistent variations in glucose regulation across the 24-hour cycle are present in normal subjects. These diurnal variations are altered in various states of impaired glucose tolerance (aging, obesity, diabetes). Changes in insulin secretion, clearance and/or action across the day have been demonstrated. Studies in subjects receiving continuous intravenous glucose infusion have shown that major alterations of glucose tolerance occur during sleep and that sleep quality markedly influences glucose utilization. Diurnal variations in glucose tolerance result from the alternation of wake and sleep states as well as from intrinsic effects of circadian rhythmicity. The important roles of physiological variations in levels of counterregulatory hormones which are markedly dependent on sleep (i.e. growth hormone) or circadian rhythmicity (i.e. cortisol) have only begun to be appreciated. The modulatory effects of sleep and circadian rhythmicity on glucose regulation may have important clinical implications for the diagnosis and treatment of abnormalities of carbohydrate metabolism. [less ▲]

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See detailDrogues stupéfiantes et sécurité routière en Belgique
Charlier, Corinne ULg; Verstraete, A.; Maes, V. et al

in Toxicorama (1998), X

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See detailDu Brut au Merlin: le fils du diable et les incertitudes génériques
Combes, Annie ULg

in Cahiers de Recherches Médiévales (XIIIe-XVe siècles) (1998), V

Le personnage de Merlin est à la base d'un récit au genre énigmatique, hybride, qui associe pour la première fois, et dans une certaine liberté, la prose et la fiction.

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See detailOn the Impact of Electron Spectroscopies (Versus Optical Techniques) to Study Organized Organic Layers and Their Interfaces
Magnée, Raphael; Mekhalif, Zineb; Doneux, Catherine et al

in Journal of Electron Spectroscopy & Related Phenomena (1998), 88-91

When preparing and characterizing ordered organic layers, knowledge of the structure of the ultra-thin fihns is often missing or difficult to gather. For different self-assembled layers of the thiol and ... [more ▼]

When preparing and characterizing ordered organic layers, knowledge of the structure of the ultra-thin fihns is often missing or difficult to gather. For different self-assembled layers of the thiol and carboxylic acid families, we show that this valuable type of information is obtainable with X-ray photoelectron spectroscopy (XPS) and high-resolution electron energyqoss spectroscopy (HREELS). Indeed, information on the film order and superficial composition is available through analysis of the core-level peak positions and widths (in XPS), and through study of the elastic peak width and angular distribution and analysis of the material excitation function (in HREELS). However, [or some insight into the crystallinity of the layer and intermolecular interactions, infrared spectroscopy in the grazing-angle absorption--reflection mode (IRASI appears to be complementary [less ▲]

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See detailOiseau, d'où viens-tu?
Pierard, Sébastien ULg; Franchimont, Claudine ULg; Pierard, Gérald ULg

in Association des Géologues Amateurs de Belgique Minibul (1998), 31(8), 20-22

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See detailhigh frequency oscillatory ventilation in neonatal RDS: initial volume optimization and respiratory mechanics
Battisti, Oreste ULg; Kalenga, M.; François, A. et al

in Journal of Applied Physiology (1998), 84

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See detailUne nouvelle tentative de commentaire de la strophe Yt 5. 7
Swennen, Philippe ULg

in Studia Iranica (1998), 27(2), 205-212

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See detailP53, Bax and Bcl-2 in Vivo Expression in the Murine Thymus after Apoptogenic Treatments
Denis, Ghislaine; Humblet, Chantal ULg; Verlaet, Myriam ULg et al

in Anticancer Research (1998), 18(5, Sep-Oct), 3315-21

BACKGROUND: Neoplasia can results from a lack of cell elimination by apoptosis. In order to determine if mechanisms controlling apoptosis are disturbed during neoplastic transformation in a model of ... [more ▼]

BACKGROUND: Neoplasia can results from a lack of cell elimination by apoptosis. In order to determine if mechanisms controlling apoptosis are disturbed during neoplastic transformation in a model of murine radio-induced thymic lymphomas, we have assessed the kinetics of p53, Bax and Bcl-2 in situ expression after induction of thymic apoptosis by irradiation or glucocorticoids at first in normal mice. MATERIALS AND METHODS: TUNEL method was used for in situ detection of apoptosis and protein expression was determined by indirect immunohistochemistry. RESULTS: After hydrocortisone injection, levels of p53 and Bax, but not Bcl-2, expression were raised. A whole body sublethal irradiation led to an increase of p53 and Bcl-2, but not Bax, expression. CONCLUSIONS: This is the first in vivo report of in situ protein expression in the thymus after apoptogenic treatments of mice. The results suggest that Bax could be involved in glucocorticoid-mediated apoptosis. The increased levels of Bcl-2 expression are discussed. [less ▲]

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See detailCell cycle-related changes in repopulating capacity of human mobilized peripheral blood CD34(+) cells in non-obese diabetic/severe combined immune-deficient mice.
GOTHOT, André ULg; Van der loo, J. C. M.; Clapp, D. W. et al

in Blood (1998), 92(8), 2641-9

Most primitive hematopoietic progenitor cells reside in vivo within the G0/G1 phase of the cell cycle. By simultaneous DNA/RNA staining it is possible to distinguish G0 and G1 states and to isolate cells ... [more ▼]

Most primitive hematopoietic progenitor cells reside in vivo within the G0/G1 phase of the cell cycle. By simultaneous DNA/RNA staining it is possible to distinguish G0 and G1 states and to isolate cells in defined phases of the cell cycle. We report here the use of cell cycle fractionation to separate human mobilized peripheral blood (MPB) CD34(+) cells capable of repopulating the bone marrow (BM) of non-obese diabetic/severe combined immune-deficient (NOD/SCID) mice. In freshly isolated MPB, repopulating cells were predominant within the G0 phase, because transplantation of CD34(+) cells residing in G0 (G0CD34(+)) resulted on average in a 16.6- +/- 3.2-fold higher BM chimerism than infusion of equal numbers of CD34(+) cells isolated in G1. We then investigated the effect of ex vivo cell cycle progression, in the absence of cell division, on engraftment capacity. Freshly isolated G0CD34(+) cells were activated by interleukin-3 (IL-3), stem cell factor (SCF), and flt3-ligand (FL) for a 36-hour incubation period during which a fraction of cells progressed from G0 into G1 but did not complete a cell cycle. The repopulating capacity of stimulated cells was markedly diminished compared with that of unmanipulated G0CD34(+) cells. Cells that remained in G0 during the 36-hour incubation period and those that traversed into G1 were sorted and assayed separately in NOD/SCID recipients. The repopulating ability of cells remaining in G0 was insignificantly reduced compared with that of unstimulated G0CD34(+) cells. On the contrary, CD34(+) cells traversing from G0 into G1 were largely depleted of repopulating capacity. Similar results were obtained when G0CD34(+) cells were activated by the combination of thrombopoietin-SCF-FL. These studies provide direct evidence of the quiescent nature of cells capable of repopulating the BM of NOD/SCID mice. Furthermore, these data also demonstrate that G0-G1 progression in vitro is associated with a decrease in engraftment capacity. [less ▲]

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See detailAnalyse de l'enseignement des activités physiques et sportives dans la perspective d'un traitement différencié des élèves de l'enseignement primaire
Piéron, Maurice ULg; Ledent, Maryse; Delfosse, Catherine et al

in Revue de l'Education Physique (1998), 38(1), 11-24

Afin de recueillir une image valide tu traitement différencié des élèves dans des leçons d'éducation physique, il est primordial de proposer une approche multidimensionnelle, prenant comme cible les ... [more ▼]

Afin de recueillir une image valide tu traitement différencié des élèves dans des leçons d'éducation physique, il est primordial de proposer une approche multidimensionnelle, prenant comme cible les différents acteurs du processus édagogique, à la fois les enseignants et les élèves. Par ailleurs, deux types d'informations devraient être récoltés afin de rendre compte de la réalité de la relation pédagogique: celles qui concernent les comportements et actions concrètes et celles relevant des valeurs, attitudes, perceptions et mécanismes de prise de décision. Les premières reposent sur l'observation alors que les secondes exigent l'interrogation des sujets. [less ▲]

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See detailLesions of morbillivirus infection in a fin whale (Balaenoptera physalus) stranded along the Belgian coast
Jauniaux, Thierry ULg; Charlier, G.; Desmecht, M. et al

in Veterinary Record : Journal of the British Veterinary Association (1998), 143(15), 423-424

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See detailClinical experience with antithrombin III concentrates in critically ill patients with sepsis and multiple organ failure.
Eisele, Bernd; Lamy, Maurice ULg

in Seminars in Thrombosis & Hemostasis (1998), 24(1), 71-80

Despite improvements in critical care medicine and the development and aggressive use of potent broad-spectrum anti-microbial agents, mortality due to severe sepsis has not changed during the recent years ... [more ▼]

Despite improvements in critical care medicine and the development and aggressive use of potent broad-spectrum anti-microbial agents, mortality due to severe sepsis has not changed during the recent years and still comes to 35% to 45%. For quite a long time our understanding of the pathophysiology of sepsis was mainly focused on endotoxin and proinflammatory cytokines like tumor necrosis factor or interleukin-1. Now it is generally accepted that many signs and symptoms of sepsis are not directly mediated by cytokines but are transmitted through other mediator systems. The coagulation system comes into play especially when the septic process progresses to malperfusion and organ failure. Antithrombin III is an important inhibitor of the intrinsic, extrinsic and common pathway of coagulation. Recently, evidence has been accumulating that there is an additional anti-inflammatory potential of the drug. Currently there are several clinical trials ongoing to investigate whether this effect is of clinical relevance in the treatment of patients with severe sepsis. [less ▲]

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See detailObjets géographiques à limites indéterminées. Modélisation et intégration dans un modèle conceptuel de données
Pantazis, Dimos; Donnay, Jean-Paul ULg

in Revue Internationale de Géomatique (1998), 7(2), 159-186

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See detailSystème rénine-angiotensine II-aldostérone: quoi de neuf en 1998?
Krzesinski, Jean-Marie ULg

in Médisphère (1998), 91(12-13),

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See detailcompte-rendu
Gavray, Claire ULg

in Recherches sociologiques (1998), 24

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See detailAn association exists between bovine herpesvirus-4 seropositivity and abortion in cows.
Czaplicki, G.; Thiry, Etienne ULg

in Preventive Veterinary Medicine (1998), 33(1-4), 235-40

The prevalence of cattle seropositive to bovine herpesvirus-4 (BHV-4) is high in Belgium. In Belgian farms, clinical signs associated with BHV-4 infection essentially involve the genital tract and consist ... [more ▼]

The prevalence of cattle seropositive to bovine herpesvirus-4 (BHV-4) is high in Belgium. In Belgian farms, clinical signs associated with BHV-4 infection essentially involve the genital tract and consist mainly of postpartum metritis or metroperitonitis. The role of BHV-4 in abortion has not been definitively demonstrated but epidemiological and experimental facts suggest its involvement. A seroepidemiological investigation was therefore conducted as a case-control study to compare the seroprevalences of BHV-4 infections in the aborted-cow population and in a randomly selected control group in the province of Liege (Belgium). The seroprevalence (17.2%) in aborted cows was significantly higher than that of the control group (10.0%). The odds ratio (OR) was 1.87 (1.06 < 3.30). BHV-4 infection is therefore considered as a risk factor for abortion in cows. [less ▲]

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See detailThe effects of age and location on the biomechanical and biochemical properties of canine tracheal ring cartilage.
Hamaide, Annick ULg; Arnoczky, Steven; Ciarelli, Mike et al

in American Journal of Veterinary Research (1998), 59

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See detailToxiques et analyses biologiques en toxicologie hospitalière
Capolaghi, B.; Charlier, Corinne ULg; Feuillu, A. et al

in Toxicorama (1998), X

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See detailSynthesis And Physicochemical Characterization Of Mixed Diacid Triglycerides That Contain Elaidic Acid
Elisabettini, P.; Lognay, Georges ULg; Desmedt, A. et al

in Journal of the American Oil Chemists Society (1998), 75(2),

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See detailDynamical atomic charges: The case of ABO(3) compounds
Ghosez, Philippe ULg; Michenaud, J. P.; Gonze, X.

in Physical Review. B : Condensed Matter (1998), 58(10), 6224-6240

Based on recent first-principles computations in perovskite compounds, especially BaTiO3, we examine the significance of the Born effective charge concept and contrast it with other atomic charge ... [more ▼]

Based on recent first-principles computations in perovskite compounds, especially BaTiO3, we examine the significance of the Born effective charge concept and contrast it with other atomic charge definitions, either static (Mulliken, Bader, etc.) or dynamical (Callen, Szigeti, etc.). It is shown that static and dynamical charges are not driven by the same underlying parameters. A unified treatment of dynamical charges in periodic solids and large clusters is proposed. The origin of the difference between static and dynamical charges is discussed in terms of local polarizability and delocalized transfers of charge: local models succeed in reproducing anomalous effective charges thanks to large atomic polarizabilities but, in ABO(3) compounds, ab initio calculations favor the physical picture based upon transfer of charges. Various results concerning barium and strontium titanates are presented. The origin of anomalous Born effective charges is discussed thanks to a band-by-band decomposition which allows us to identify the displacement of the Wannier center of separated bands induced by an atomic displacement. The sensitivity of the Born effective charges to microscopic and macroscopic strains is examined. Finally, we estimate the spontaneous polarization in the four phases of barium titanate. [less ▲]

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See detailPharma-clinics. Comment je traite ... un sujet avec une concentration basse de cholesterol HDL.
Scheen, André ULg

in Revue Médicale de Liège (1998), 53(12), 727-31

The decision to treat an individual with low HDL cholesterol level depends on his overall cardiovascular risk profile and the therapeutic strategy is based upon the characteristics of the lipid profile ... [more ▼]

The decision to treat an individual with low HDL cholesterol level depends on his overall cardiovascular risk profile and the therapeutic strategy is based upon the characteristics of the lipid profile (isolated abnormality, associated hypertriglyceridaemia or combined elevation of LDL cholesterol). The treatment must favour diet and exercise, before considering a possible pharmacological approach. Results are usually acceptable with better life habits and appropriate diet when low HDL cholesterol level is associated to hypertriglyceridaemia. From a pharmacological point of view, the best results are obtained with fibrates or nicotinic acid. However, results are often disappointing when low HDL cholesterol level is isolated. [less ▲]

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See detailQuantifying habitat edge for nature reserve design.
Bogaert, Jan ULg; Van Hecke, P; Salvador-Van Eysenrode, D et al

in Coenoses (1998), 13(3), 131-136

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See detailL'hépatite E
Delwaide, Jean ULg; Gerard, Christiane ULg

in Les Hépatites virales, Roche (1998)

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See detailPrise en compte des variations de la perméabilité et du coefficient d’emmagasinement spécifique dans les simulations hydrogéologiques en milieux argileux saturés
Dassargues, Alain ULg

in Bulletin de la Société Géologique de France (1998), 169(5), 665-673

It is well known that the consolidation of compressible silt-clay geological layers induces a decrease in porosity. Consequently, the hydraulic conductivity and the compressibility of the medium are also ... [more ▼]

It is well known that the consolidation of compressible silt-clay geological layers induces a decrease in porosity. Consequently, the hydraulic conductivity and the compressibility of the medium are also decreased and the hydrodynamic conditions changed. A full coupling between the groundwater flow and the subsidence processes must be taken into account with non-linear parameters. In saturated conditions, the specific storage coefficient is directly related to the volume compressibility of the medium; its evolution depends on the rheological law chosen to describe the consolidation of the medium. For the hydraulic conductivity, the choice of the variation law is more difficult and should be made in each case as a function of the experimental data and measurements. Comparisons are made between computations with constant and varying parameters. The computed pore pressures are strongly affected, automatically inducing the major differences in the calculated subsidences. Different laws of non-linearity for the hydraulic conductivity are tested on a practical case taken from the study of the land subsidence in Shanghai. This subsidence was induced by heavy groundwater withdrawal. [less ▲]

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See detailSpontaneous longitudinally orientated axonal regeneration is associated with the Schwann cell framework within the lesion site following spinal cord compression injury of the rat.
Brook, G. A.; Plate, D.; Franzen, Rachelle ULg et al

in Journal of Neuroscience Research (1998), 53(1), 51-65

Spontaneous cellular reorganisation at the lesion site has been investigated following massive spinal cord compression injury in adult rats. By 2 days post operation (p.o.), haemorrhagic necrosis ... [more ▼]

Spontaneous cellular reorganisation at the lesion site has been investigated following massive spinal cord compression injury in adult rats. By 2 days post operation (p.o.), haemorrhagic necrosis, widespread axonal degeneration, and infiltration by polymorphnuclear granulocytes and OX42-positive macrophages were observed in the lesion site. By 7 days p.o., low affinity nerve growth factor receptor-positive Schwann cells, from activated spinal roots, were identified as they migrated far into the lesion. Between 7 and 14 days p.o., the overlapping processes of Schwann cells within the macrophage-filled lesion formed a glial framework which was associated with extensive longitudinally orientated ingrowth by many neurofilament-positive axons. Relatively few of these axons were calcitonin gene-related peptide (CGRP)-, substance P (SP)-, or serotonin (5HT)-positive; however, many were glycinergic or gamma aminobutyric acid (GABA)ergic. At 21 and 28 days p.o. (the longest survival times studied), a reduced but still substantial amount of orientated Schwann cells and axons could be detected at distances of up to 5 mm within the lesion. Glial fibrillary acidic protein (GFAP) immunoreactivity demonstrated the slow formation of astrocytic scarring which only became apparent at the lesion interface between 21 and 28 days p.o. The current data suggest the possibility of developing future therapeutic strategies designed to maintain or even enhance these spontaneous and orientated regenerative events. [less ▲]

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See detailImpala: A Simple Restraint Field To Simulate The Biological Membrane In Molecular Structure Studies
Ducarme, P.; Rahman, M.; Brasseur, Robert ULg

in Proteins-Structure Function and Bioinformatics (1998), 30(4), 357-71

The lipid bilayer is crucial for the folding of integral membrane proteins. This article presents an empirical method to account for water-lipid interfaces in the insertion of molecules interacting with ... [more ▼]

The lipid bilayer is crucial for the folding of integral membrane proteins. This article presents an empirical method to account for water-lipid interfaces in the insertion of molecules interacting with bilayers. The interactions between the molecule and the bilayer are described by restraint functions designed to mimic the membrane effect. These functions are calculated for each atom and are proportional to the accessible surface of the latter. The membrane is described as a continuous medium whose properties are varying along the axis perpendicular to the bilayer plane. The insertion is analyzed by a Monte Carlo procedure applied to the restraint functions. The method was successfully applied to small alpha peptides of known configurations. It provides insights of the behaviors of the peptide dynamics that cannot be obtained with statistical approaches (e.g., hydropathy analysis). [less ▲]

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See detailComment j'explore... une hypertriglyceridemie.
Scheen, André ULg

in Revue Médicale de Liège (1998), 53(2), 103-5

The strategy for the diagnosis of hypertriglyceridaemia comprises three successive steps. First, the physician should confirm the biological abnormality by at least one additional blood sample taken after ... [more ▼]

The strategy for the diagnosis of hypertriglyceridaemia comprises three successive steps. First, the physician should confirm the biological abnormality by at least one additional blood sample taken after an overnight fast; recent data, however, suggest that postprandial hypertriglyceridaemia may also represent a cardiovascular risk factor. Second, the phenotype of hypertriglyceridaemia should be considered as either isolated high triglyceride levels or hypertriglyceridaemia combined with hypercholesterolemia may be present; the combination of hypertriglyceridaemia with a low HDL cholesterol concentration or its association with the metabolic or insulin resistance syndrome should also be investigated. Third, all should be done in order to find the etiology of the hypertriglyceridaemia (by determining its genetic or nutritional origin, by excluding possible underlying pathologies, by looking for drugs able to increase serum triglyceride levels). These various steps should help the physician to take the final decision of treating one particular patient as well as to chose the most appropriate, nutritional or pharmacological, treatment. [less ▲]

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See detailThymic expression of neuroendocrine self-peptide precursors: role in T-cell survival and self-tolerance
Geenen, Vincent ULg; Kecha, Ouafae; Martens, Henri ULg

in Journal of Neuroendocrinology (1998), 10

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See detailPoints to consider for the development of new indications for hormone replacement therapies and estrogen-like molecules
Stevenson, JC; GASPARD, Ulysse ULg; Avouac, B et al

in Climacteric : The Journal of the International Menopause Society (1998), 1

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See detailArbres fruitiers et virus: le diagnostic moleculaire.
Kummert, J.; Lepoivre, Philippe ULg

in Fruit Belge (1998), 66(473),

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See detailEstimation of the dominance variance for postweaning gain in the US Limousin population
Gengler, Nicolas ULg; Misztal, I.; Bertrand, J. K. et al

in Journal of Animal Science (1998), 76(10), 2515-2520

The objective of this study was to estimate the dominance variance for postweaning gain in Limousin cattle. Data included 215,326 records of postweaning gain from 205 to 365 d, provided by the North ... [more ▼]

The objective of this study was to estimate the dominance variance for postweaning gain in Limousin cattle. Data included 215,326 records of postweaning gain from 205 to 365 d, provided by the North American Limousin Foundation. Parental dominance subclasses were formed and related using the method of Hoeschele and VanRaden. Variance components were estimated using Method R based on six samples of 50%. Fixed effects in the model included contemporary group apd covariates for inbreeding and breed composition (percentage Limousin). Heterozygosity was negatively correlated with breed composition (< -.99) and was therefore not included in the model. Two types of contemporary groups used as original groups from the National Cattle Evaluation were partially based on breed composition. Original contemporary groups that were too homogeneous for breed composition were replaced by herd-year-sex classes. Two models were used with the two data sets. Model 1 contained the fixed effects described above and an additive genetic effect. Model 2 Included a dominance effect in addition to the effects contained in Model 1. In total, four combinations of contemporary group x model were used. Dominance variance was computed as being four times the estimated parental subclass variance. Estimates for inbreeding depression and breed composition (percentage Limousin) were all small and not greatly affected by inclusion of dominance effects or changes in contemporary groups. Estimates of the additive variance (expressed as percentage of the phenotypic variance) were only slightly affected, with values between 20 and 21%. Dominance estimates were highly affected when passing from original (10%) and to alternative contemporary groups (18%). Such large values may indicate that dominance is important for postweaning gain. Results showed the advantage of an individual dominance approach based on sire-dam combinations; therefore, expected gains through the use of specific combination ability as a part of the mating selection criteria for growth might be high. [less ▲]

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See detailPharma-clinics. Le medicament du mois. Premelle (oestrogenes conjugues + medroxyprogesterone).
Scheen, André ULg

in Revue Médicale de Liège (1998), 53(10), 638-40

Premelle, commercialised by Wyeth-Lederle, is a combination of conjugated estrogens 0.625 mg and medroxyprogesterone acetate 5 mg which is indicated in the treatment of menopause-associated problems ... [more ▼]

Premelle, commercialised by Wyeth-Lederle, is a combination of conjugated estrogens 0.625 mg and medroxyprogesterone acetate 5 mg which is indicated in the treatment of menopause-associated problems, among which vasomotor symptoms, atrophic vaginitis and/or urethritis, and in the prevention and treatment of post-menopausal osteoporosis. It is presented in two formulations, Premelle cyclic 5 and Premelle 5. The former, in which the progestagen is only given during the last 14 out of 28 days of the treatment cycle, is accompanied by regular bleeding and thus preferably indicated during perimenopause whereas the latter, in which the progestagen is given continuously and results in amenorrhea, is mostly indicated after menopause in order to improve long-term compliance. [less ▲]

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See detailEvolution de la végétation du secteur sud de la tourbière haute active de la fagne Wallonne, au cours de ces 60 dernières années (Plateau des Hautes-Fagnes, Belgique)
Frankard, Philippe; Hindryckx, Marie-Noëlle ULg

in Belgian Journal of Botany (1998), 131(1), 28-40

Evolution of the vegetation in the southern part of the fagne Wallonne raised bog, during the last 60 years (Hautes- Fagnes, Belgium). – Less than 500 years ago, raised bogs covered over 1000 ha on the ... [more ▼]

Evolution of the vegetation in the southern part of the fagne Wallonne raised bog, during the last 60 years (Hautes- Fagnes, Belgium). – Less than 500 years ago, raised bogs covered over 1000 ha on the Hautes-Fagnes plateau. Today, only + 125 ha of ombrotrophic little disturbed raised bogs remain. Recent studies have proved that these remnants show evidences of typical peat-forming communities regression. The aim of this study is to follow the vegetation dynamic of the southern part of the fagne Wallonne raised bog, by comparison of old and recent vegetation transects made in 1938, 1957 and 1995 and to detect in it some possible signs of evolution or regression. The vegetation has been mapped at 1 :10 scale and qualitatively surveyed on 4 m2 plots each 20 m along the transect. The cover degree of each species has been estimated. The results show a large reduction of the cover degree of Sphagnum species, an almost disappearance of the "Schlenken" and an increase of heathland species. These results are compared with the observations for the northern and the central zones (HINDRYCKX 1989). The damage to the typical raised bog vegetation is very clear and important in the northern part of the bog: disappearance of typical species overgrown by Molinia caerulea. In the central and the southern parts, the increasing cover degree of ericaceous plants indicates clearly that the peat forming activity is strongly slowed down. [less ▲]

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See detailApoptosis During the Development of Radiogenic Thymic Lymphomas: Effects of Treatments Inhibiting Lymphoma Development
Humblet, Chantal ULg; Denis, Ghislaine; Greimers, Roland ULg et al

in Anticancer Research (1998), 18(5A, Sep-Oct), 3469-74

INTRODUCTION: Whole body fractionated irradiation induces thymic lymphomas in C57BL/Ka mice after a latent period during which preleukemic cells progressively transform into leukemic cells within an ... [more ▼]

INTRODUCTION: Whole body fractionated irradiation induces thymic lymphomas in C57BL/Ka mice after a latent period during which preleukemic cells progressively transform into leukemic cells within an abnormal thymic microenvironment. A bone marrow graft or repeated cytokine injections prevent lymphoma development. We think that these treatments restore altered mechanisms controlling apoptosis. MATERIALS AND METHODS: Apoptosis was analyzed by flow cytometry in thymocytes from different groups of mice (control, preleukemic, prevented mice). RESULTS: The apoptotic rates did not change in freshly isolated thymocytes from different experimental groups. However, after culture, the level of apoptosis increased in preleukemic thymuses; and returned to normal value in cultured thymocytes from irradiated mice after lymphoma preventing treatments. Furthermore, thymic microenvironmental factors can control thymocyte apoptosis. CONCLUSION: We propose that after leukemogenic irradiation, there is an increase of cells with an activated suicide program, but that alterations of thymic environmental factors rescue them from apoptosis, allowing their further neoplastic transformation. [less ▲]

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See detailLe juste entre formalisme et substantialisme. Etude comparative des jugements émis par des Tunisiens et des Français à propos d’une pratique coutumière de justice corrective
Nachi, Mohamed ULg

in Science Information/Information sur les sciences sociales (1998), 37(4), 547-592

Dans cet article, l’auteur se propose d’étudier le sens de la justice à partir d’un « cas » empirique recueilli en Tunisie et soumis à l’appréciation et au jugement de Tunisiens mais aussi de Français ... [more ▼]

Dans cet article, l’auteur se propose d’étudier le sens de la justice à partir d’un « cas » empirique recueilli en Tunisie et soumis à l’appréciation et au jugement de Tunisiens mais aussi de Français. L’examen des différentes espèces de justice établies par Aristote conduit à préciser les contours du tanfîl en tant qu’institution de partage mettant en oeuvre des règles de justice distributive et à montrer en quoi il s’agit dune forme de justice corrective sui generis. Après avoir éclairci la question du rapport aux normes, à travers la notion d’invocation des normes, et la question de la qualification, en comparant qualification juridique et qualification ordinaire, l’article analyse les formes d’argumentation et de justification que les Tunisiens et les Français interrogés mobilisent pour faire valoir leurs sens de la justice. L’analyse révèle deux types principaux de concepts de justice distributive : celle dans laquelle la légalité et le formalisme occupent une place prépondérante et celle où la primauté est accordée au contenu, à la substance, de la règle de justice. Tandis que dans le premier type le juste se confond avec le légal, dans le second non seulement il s’en distingue mais peut même s’y opposer, car ce qui est légal peut être injuste. L’auteur montre en particulier, en partant de la trilogie du juste chez Ricœur, dune part, que le compromis requiert une place de premier plan, et d’autre part, que l’idée de justice ne peut trouver sa pleine signification que dans une posture intermédiaire entre le légal et le bon, entre le formel et le substantiel. [less ▲]

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