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See detailMicrostructural study of a zinc-aluminium-copper alloy after thermal treatment at 100°C and creep
Terziev, L.; Lecomte-Beckers, Jacqueline ULg; Wegria, J.

in Zeitschrift für Metallkunde (1994), 85[9]

The creep behaviour of the ternary Zn—A1—Cu alloy after thermal treatment at ioo oc has been studied. The applied creep stress does flot modify clearly the transition phases (OL, T% ‘11m) appearing during ... [more ▼]

The creep behaviour of the ternary Zn—A1—Cu alloy after thermal treatment at ioo oc has been studied. The applied creep stress does flot modify clearly the transition phases (OL, T% ‘11m) appearing during isothermal ageing. During the creep test, the formation of an important density of defects resuits in the precipitation of T’ and O’ particles. The quantity of these phases depends on the creep conditions. [less ▲]

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See detailPyoverdine production is not the sole trait involved in the biological control of soil diseases by Pseudomonas fluorescens ATCC 17400.
Jacques, Ph.; Cornelis, P.; Gaballa, A. et al

in Archives Internationales de Physiologie, de Biochimie et de Biophysique (1994), 102(B81),

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See detailLATTICE-DYNAMICS AND DIELECTRIC-PROPERTIES OF INCIPIENT FERROELECTRIC TIO2 RUTILE
LEE, C.; Ghosez, Philippe ULg; GONZE, X.

in Physical Review. B : Condensed Matter (1994), 50(18), 13379-13387

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See detailL'évaluation dans le domaine de l'éducation : tendances
de Landsheere, Gilbert ULg

in Orientation Scolaire et Professionnelle (L') [=OSP] (1994), 23(1), 59-77

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See detailNatural-Convection Above Line Heat-Sources In Greenhouse Canopies
Aubinet, Marc ULg; Deltour, Jules

in International Journal of Heat and Mass Transfer (1994), 37(12),

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See detailInvolvement Of The Cyclic Amp-Responsive Element-Binding Protein In Bovine Leukemia-Virus Expression In-Vivo
Adam, E.; Kerkhofs, P.; Mammerickx, M. et al

in Journal of Virology (1994), 68(9),

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See detailHaemodynamic dysfunctions involved in experimental bovine pneumonic pasteurellosis
Desmecht, Daniel ULg; Amory, Hélène ULg; Linden, Annick ULg et al

in Journal of Experimental Animal Science (1994), 37

The present experiments were designed Co challenge, without the bias of anaesthesia, the previously reported statement that intratracheal administration of Pasteurella haemolvtica does not impair ... [more ▼]

The present experiments were designed Co challenge, without the bias of anaesthesia, the previously reported statement that intratracheal administration of Pasteurella haemolvtica does not impair haemodynamics in calves. Central venous, pulmonary arterial and capillary wedge and systemic arterial pressures were measured by fluid-filled catheters in 11 calves. Cardiac output was measured by the thermodilution technique, heart rate (HR) was derived from the ECG and stroke volume (SV), pulmonary and systemic vascular resistance were calculated. The haemodynamic values were measured hourly from the first to the tenth hour alter intratracheal inoculation of P. haemolytica. Cardiovascular response was marked and typically consisted of two hypotensive hypodynamic phases. The first, which occurred by the second hour after inoculation, consisted of a transient bradycardia and a systemic vasodilation leading to profound hypotension and reduced venous return. Cardiac performance then recovered, but systemic hypotension persisted and hypoxaemia developed. The second phase occurred by the seventh hour alter inoculation and was associated with a decline in SV, an increase in HR, and pulmonary hypertension. Three different degrees of cardiovascular dysfunctions were found, differing basically in the intensity of the first phase bradycardia and second phase reduction in SV and systemic arterial pressure, suggesting that experimental pneumonia produced by intratracheal instillation of P. haemolytica in calves results in distinct cardiovascular dysfunctions depending on the animal. Ignorance of the underlying haemodynamic status therefore precludes reliable interpretation of physiological as well as pharmacological results using this model of respiratory disease [less ▲]

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See detailWorking memory in Down's syndrome: Training the rehearsal strategy
Comblain, Annick ULg

in Down's Syndrome, Research and Practice : The Journal of the Sarah Duffen Centre (1994), 2(3), 123-126

This study reports on the verbal short term memory skills of individuals with Down's syndrome and on the possibility of increasing memory span durably by using a rehearsal strategy

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See detailQue retenir d’une expérience d’éducation physique quotidienne dans le cadre d’une rénovation de l’enseignement fondamental?
Piéron, Maurice; Cloes, Marc ULg; Delfosse, Catherine et al

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 detailEpidemiological evaluation of a monoclonal ELISA detecting antibodies against bovine leukaemia virus in serum pools.
Knapen, K.; Kerkhofs, P.; Thiry, Etienne ULg et al

in Epidemiology & Infection (1994), 113(3), 563-9

Sensitivity, specificity and predictive values of an enzyme-linked immunosorbent assay (ELISA) for detecting antibodies against bovine leukaemia virus (BLV) were evaluated using a representative sample of ... [more ▼]

Sensitivity, specificity and predictive values of an enzyme-linked immunosorbent assay (ELISA) for detecting antibodies against bovine leukaemia virus (BLV) were evaluated using a representative sample of 145 serum pools, comprising from 3 to 48 individual sera. The sample was constituted according to the frequency distribution of the negative and positive pools analysed during a screening involving the whole cattle population of Belgium. Sensitivity and specificity were estimated to 88.9% and 100% and the predicted negative and positive values were 99.9% and 100%, respectively. These results indicate the use of serum pools is suitable for the detection of BLV infected herds in eradication campaigns. [less ▲]

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See detailDo canine scalene and sternomastoid muscles play a role in breathing?
De Troyer, A.; Cappello, M.; Brichant, Jean-François ULg

in Journal of Applied Physiology (Bethesda, Md. : 1985) (1994), 76(1), 242-52

To assess the respiratory function of the scalene and sternomastoid muscles in the dog, we studied the effect of graded increases in inspiratory airflow resistance and single-breath airway occlusion on ... [more ▼]

To assess the respiratory function of the scalene and sternomastoid muscles in the dog, we studied the effect of graded increases in inspiratory airflow resistance and single-breath airway occlusion on the electrical activity of these muscles in 18 supine anesthetized spontaneously breathing animals. The sternomastoids never showed any activity, and the scalenes showed some inspiratory activity during occlusion in only two animals. The adoption of the prone position and bilateral cervical vagotomy did not affect this pattern. Hypercapnia also did not elicit any sternomastoid activity and induced scalene inspiratory activity during occlusion in only four of nine animals. On microscopic examination, however, both muscles were found to contain large numbers of spindles, suggesting that they have the capacity to respond to stretch. In addition, with increases in inspiratory resistance, both the sternum and ribs were displaced in the caudal direction. As a result, the scalenes demonstrated a gradual inspiratory lengthening and the normal inspiratory lengthening of the sternomastoids was accentuated. Additional studies in three unanesthetized animals showed consistent activity in the scalene and sternomastoid muscles during movements of the trunk and neck but no activity during breathing, including occluded breathing. These observations thus indicate that the alpha-motoneurons of the scalene and sternomastoid muscles in the dog have very small central respiratory drive potentials with respect to their critical firing threshold. In this animal, these muscles do not have a significant respiratory function. [less ▲]

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See detailCircadian rhythms and the induction of flowering in the long-day grass Lolium temulentum L.
Périlleux, Claire ULg; Bernier, Georges ULg; Kinet, Jean Marie

in Plant, Cell & Environment (1994), 17(6), 755-761

Plants of Lolium temulentum L. strain Ceres were grown in 8-h short day (SD) for 45 d before being exposed either to a single long day (LD) or to a single 8-h SD given during an extended dark period. For ... [more ▼]

Plants of Lolium temulentum L. strain Ceres were grown in 8-h short day (SD) for 45 d before being exposed either to a single long day (LD) or to a single 8-h SD given during an extended dark period. For LD induction, the critical photoperiod was between 12 and 14 h, and more than 16 h were needed for a maximal flowering response. During exposure to a single 24-h LD, the translocation of the floral stimulus began between the fourteenth and the sixteenth hours after the start of the light period, and was completed by the twenty-fourth hour. Full flowering was also induced by one 8-h SD beginning 4 or 28 h after the start of a 40-h dark period, i.e. by shifting 12 h forward or beyond the usual SD. The effectiveness of a so-called 'displaced short day' (DSD) was not affected by light quality and light intensity. With a mixture of incandescent and fluorescent lights at a total photosynthetic photon flux density of 400 µmol m-2 s-1, a 4-h light exposure beginning 4 h after the start of a 40-h dark period was sufficient to induce 100 flowering. The flower-inducing effect of a single 8-h DSD was also assessed during a 64-h dark period. Results revealed two maxima at a 20-h interval. This fluctuation in light sensitivity suggests that a circadian rhythm is involved in the control of flowering of L. temulentum. [less ▲]

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See detailAcute ethanol increases taurine but neither glutamate nor GABA in the nucleus accumbens of male rats: a microdialysis study.
Dahchour, Abdelkhader; Quertemont, Etienne ULg; De Witte, Philippe

in Alcohol & Alcoholism (1994), 29(5), 485-7

The effects of acute intraperitoneal administration of ethanol (1-3 g/kg body wt) on the extracellular concentrations of glutamate (GLU), taurine (TAU) and gamma-aminobutyric acid (GABA) in rat brain ... [more ▼]

The effects of acute intraperitoneal administration of ethanol (1-3 g/kg body wt) on the extracellular concentrations of glutamate (GLU), taurine (TAU) and gamma-aminobutyric acid (GABA) in rat brain nucleus accumbens were studied by the microdialysis technique coupled to HPLC-EC detection. Levels of GLU and GABA were not affected by ethanol, whereas those of TAU were increased by doses of the drug of 2-3 g/kg. [less ▲]

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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 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 detailEvaluation du débit sanguin lors de contractions volontaires et évoquées électriquement
Vanderthommen, Marc ULg; Depresseux, J.C.; BAUVIR, Philippe ULg et al

in Kiné 2000 (1994), 5

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See detailLa régionalisation du droit pénal international
Flore, Daniel ULg; Thomas, F.

in Revue internationale de droit pénal (1994)

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See detailIs aprotinin worth the risk in total hip replacement?
Janssens, Marc ULg; Joris, Jean ULg

in Anesthesiology (1994), 81(2), 518-519

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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 detailOxygen Transport Chain in Double-Muscled Blue Belgian Cattle
Lekeux, Pierre ULg; Amory, Hélène ULg; Desmecht, Daniel ULg et al

in British Veterinary Journal (The) (1994), 150(5, Sep-Oct), 463-471

The physiological peculiarities of the oxygen transport chain in double-muscled Blue Belgian cattle are described. The investigations performed at several levels of the oxygen transport chain suggest that ... [more ▼]

The physiological peculiarities of the oxygen transport chain in double-muscled Blue Belgian cattle are described. The investigations performed at several levels of the oxygen transport chain suggest that the increased susceptibility of these cattle to stress, resulting mainly in respiratory diseases, is due to an insufficient functional reserve capacity mainly involving the pulmonary and cardiovascular systems. The resulting lack of 'functional hardiness' of the oxygen transport chain is seen in those double-muscled cattle which do not react in an appropriate or predictable way when submitted to a hostile environment. [less ▲]

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See detailHIGH-RESOLUTION SPECTRA OF JUPITER NORTHERN AURORAL ULTRAVIOLET EMISSION WITH THE HUBBLE-SPACE-TELESCOPE
TRAFTON, L. M.; Gérard, Jean-Claude ULg; Munhoven, Guy ULg et al

in Astrophysical Journal (1994), 421(2), 816-827

The first spectroscopic observations of planetary aurora with the HST are reported. These include spectral regions centered on the H-2 Lyman and Werner bands of a region of Jupiter's northern aurora. The ... [more ▼]

The first spectroscopic observations of planetary aurora with the HST are reported. These include spectral regions centered on the H-2 Lyman and Werner bands of a region of Jupiter's northern aurora. The observations were made with the Goddard High Resolution Spectrograph (GHRS) using the Large Science Aperture as part of a campaign to study Jupiter at the time of the Ulysses flyby. The individual rotational-vibrational bands are resolved and the observed emissions are essentially all from H-2. A rotational-vibrational temperature for H-2 of 530 +/- 100 K is derived, a value significantly less than the 850-1100 K reported for Jovian H-3(+) in the near-infrared but consistent with the temperature reported for fundamental-band quadrupole H-2 emission. Comparison with the Faint Object Camera (FOC) images shows that the observed region was not one of the hot spots of the aurora. The results are interpreted in terms of electron impact excitation of H-2 from secondary particles generated by primaries precipitating into Jupiter's atmosphere from the magnetosphere. In the region of the aurora observed, the homopause level is found to be significantly hotter but not necessarily higher than observed at nonauroral latitudes. The equatorial H-2 dayglow spectrum was also detected; its intensity was 3.2 kR or 13% of the strength of the observed auroral emission. [less ▲]

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See detailHST-FOC observations of a remarkable UV auroral event on Jupiter
Gérard, Jean-Claude ULg; Grodent, Denis ULg; Prangé, R. et al

in NASA STI/Recon Technical Report N (1994), 95

Two sets of UV (ultraviolet) images of the Jovian north aurora were obtained with the Faint Object Camera (FOC) on Hubble. The first series shows a very intense discrete arc in corotation with the planet ... [more ▼]

Two sets of UV (ultraviolet) images of the Jovian north aurora were obtained with the Faint Object Camera (FOC) on Hubble. The first series shows a very intense discrete arc in corotation with the planet. The maximum apparent H2 emission rate corresponds to an electron precipitation of approximately 1/sq Wm, a very large flux in comparison with the solar EUV (extreme ultraviolet) heating. The hugh particle heating rate of the auroral upper atmosphere of Jupiter is expected to cause a large transient temperature increase and generate strong thermospheric winds. Twenty hours later, the discrete arc had considerably decreased in brightness. The timescale and magnitude of the change in the UV aurora strongly suggests that the discrete Jovian auroral precipitation is related to large scale current system variations as are the Earth's discrete aurorae. [less ▲]

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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 detailTypage moléculaire de Clostridium perfringers.
Daube, Georges ULg; Simon, P.; Limbourg, B. et al

in Annales de Médecine Vétérinaire (1994), 138

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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 detailVibration amplitudes caused by parametric excitation of cable stayed structures
Lilien, Jean-Louis ULg; Pinto da Costa, Antonio

in Journal of Sound & Vibration (1994), 174(N°1), 69-90

This paper deals with one kind of cable vibrations : the ones caused by parametric excitation.

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See detailA screening technique to isolate bacterial strains producing high molecular weight bacteriocins
Jabrane, A.; Destain, Jean-Pierre ULg; Compère, Philippe ULg et al

in Biotechnology Techniques (1994), 8(10), 751-754

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See detailMax Ophuls : le cristal et la tache
Belloi, Livio ULg

in Cinémathèque (1994), 6(automne),

Cette étude porte sur les quatre derniers films de Max Ophuls ("La Ronde", "Le Plaisir", "Madame de" et "Lola Montès") et s'attache à révéler, en eux, une forme de dilemme du visible (entre transparence ... [more ▼]

Cette étude porte sur les quatre derniers films de Max Ophuls ("La Ronde", "Le Plaisir", "Madame de" et "Lola Montès") et s'attache à révéler, en eux, une forme de dilemme du visible (entre transparence et opacité) que la modernité cinématographique inscrira résolument à son ordre du jour. [less ▲]

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See detailTrickle flow in packed columns : new experimental and theoretical investigations
Crine, Michel ULg; Marchot, Pierre ULg; Toye, Dominique ULg et al

in Trends in Chemical Engineering (1994), 2

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See detailThe Perturbed Tikhonov's Algorithm and Some of its Applications
Tossings, Patricia ULg

in RAIRO : Modélisation Mathématique et Analyse Numérique (Mathematical Modelling and Numerical Analysis) (1994), 28(2), 189-221

The proximal point algorithm has known these last years many developments connected with the expansion of the variational convergence theory. Motivated by this fact and inspired by the work of A. Tikhonov ... [more ▼]

The proximal point algorithm has known these last years many developments connected with the expansion of the variational convergence theory. Motivated by this fact and inspired by the work of A. Tikhonov and V. Arsénine in the context of convex optimization, we present a new algorithm for searching a zero of a maximal monotone operator on a real Hilbert space. We study the perturbed version of this algorithm and establish a critical comparison with the perturbed proximal point algorithm. We apply this new algorithm to convex optimization and to variational inclusions or, more particularly, to variational inequalities. [less ▲]

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See detailExpression Of Interleukin-6 Receptors And Interleukin-6 Messenger-Rna By Bovine Leukemia Virus-Induced Tumor-Cells
Droogmans, L.; Cludts, I.; Cleuter, Y. et al

in Cytokine (1994), 6(6),

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See detailDirect n.m.r. evidence for substrate-induced conformational changes in a beta-lactamase.
Jamin, M.; Damblon, Christian ULg; Bauduin-Misselyn, A. M. et al

in Biochemical Journal (1994), 301 ( Pt 1)

Cefoxitin and other beta-lactam antibiotics with a methoxy group on the alpha-face behave as very poor substrates of the Bacillus licheniformis beta-lactamase. The kinetic properties of the enzyme ... [more ▼]

Cefoxitin and other beta-lactam antibiotics with a methoxy group on the alpha-face behave as very poor substrates of the Bacillus licheniformis beta-lactamase. The kinetic properties of the enzyme-cefoxitin system made it theoretically suitable for a detailed structural study of the acyl-enzyme. Unfortunately, soaking the crystals in cefoxitin solution did not allow detection of a crystalline acyl-enzyme complex. In contrast, direct observation by n.m.r. of the stable acyl-enzyme formed with cefoxitin and moxalactam indicated clear modifications of the enzyme structure, which were reflected in the aromatic and high-field methyl regions of the spectrum. The return to the initial free enzyme spectrum was concomitant with the hydrolysis of the acyl-enzyme, the process being slow enough to allow multidimensional n.m.r. experiments. [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 detailMonofrequency Forced Oscillation Technique for the Investigation of Pulmonary Function in Calves: In Vitro and in Vivo Studies
Close, Roland; Reinhold, Petra; Lekeux, Pierre ULg

in Research in Veterinary Science (1994), 56(3), 363-372

Parameters derived from the non-invasive and simple monofrequency forced oscillation technique were compared with classical parameters of ventilatory mechanics in order to assess its usefulness for the ... [more ▼]

Parameters derived from the non-invasive and simple monofrequency forced oscillation technique were compared with classical parameters of ventilatory mechanics in order to assess its usefulness for the investigation of pulmonary function in calves. To facilitate this comparison, theoretical derivations were coupled with in vitro measurements, using an artificial lung model, and with in vivo studies. These studies compared the oscillatory resistance parameters (Ros and Re) and the respiratory system compliance (Crs) against the classical pulmonary resistance (RL) and the dynamic compliance (Cdyn), respectively. Ros and Re were highly correlated (r > or = 0.87) with RL and the comparison between Crs and Cdyn gave a similarly high correlation (r > or = 0.88). Given its simplicity, its correspondence with classical parameters and its rapidity and reproducibility, monofrequency forced oscillation technique seems well suited for the investigation of pulmonary function under field conditions. [less ▲]

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See detailEffect of aspartate and glutamate on the oxoglutarate carrier investigated in rat heart mitochondria and inverted submitochondrial vesicles.
Hautecler, J.; Sluse-Goffart, C.-M.; Evens, A. et al

in Biochimica et Biophysica Acta-Bioenergetics (1994), 1185

Interaction of glutamate and aspartate with the oxoglutarate carrier was investigated in rat heart mitochondria or inverted submitochondrial particles. With mitochondria, glutamate and aspartate had no ... [more ▼]

Interaction of glutamate and aspartate with the oxoglutarate carrier was investigated in rat heart mitochondria or inverted submitochondrial particles. With mitochondria, glutamate and aspartate had no effect on the initial rate of oxoglutarate or malate uptake. With inverted submitochondrial vesicles, binding experiments indicated that aspartate bound to the oxoglutarate carrier on its matricial face and increased the affinity of the substrate binding site for malate but did not change the affinity for oxoglutarate. Glutamate had no effect on both substrate bindings. The dissociation constants of the binary substrate-carrier complexes on the matricial side were determined (1.28 +/- 0.15 mM for oxoglutarate and 2.22 +/- 0.26 mM for malate). These values, compared with those obtained previously on the cytosolic side of intact mitochondria, confirmed the asymmetry of the carrier in the native membrane (higher affinities on the cytosolic face). It is concluded that (1) aspartate and glutamate are not cytosolic effectors of the oxoglutarate carrier, (2) matricial aspartate is a positive effector of the binding of malate on the matricial side of the oxoglutarate carrier, and (3) such a characteristic may play a role in the regulation of the oxoglutarate carrier. Thus, it may be emphasized that (1) this observation is the first clear evidence of a well-defined 'sophisticated regulation' (allosteric) of a mitochondrial metabolite carrier, and (2) this regulation of the oxoglutarate carrier may have important consequences on the efficiency of reducing equivalent import in the matrix space by the malate-aspartate shuttle. [less ▲]

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See detailFirst-principles calculations of dielectric and effective charge tensors in Barium Titanate
Ghosez, Philippe ULg; Gonze, X.; Michenaud, J. P.

in Ferroelectrics (1994), 153

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See detailThymus Involvement in Murine Acquired Immunodeficiency (Maids)
Colombi, Sonia; Deprez, Manuel ULg; de Leval, Laurence ULg et al

in Thymus (1994), 23(1), 27-37

Due to self-renewal of the peripheral pool of T-cells, adult thymectomy has normally little influence on immunocompetence. However, thymus might play a more important role in the setting of viral-induced ... [more ▼]

Due to self-renewal of the peripheral pool of T-cells, adult thymectomy has normally little influence on immunocompetence. However, thymus might play a more important role in the setting of viral-induced cytopathic effects on T-cells in the periphery. Therefore, thymus weight, cell numbers, and subset distribution were sequentially analysed after infection with RadLV-Rs, a viral mixture known to induce murine retrovirus induced immunodeficiency (MAIDS). Infection induced thymic atrophy (concerning organ weight as well as total cell number) which culminated seven weeks after inoculation. The atrophic process mostly reflected the depletion of double positive CD4+ CD8+ cells since their proportion sharply decreased around week 6. Single positive T-cells were less affected by the process. The proportion of B-cells progressively increased. Surprisingly, there was a strong correlation between the extent of atrophy and the frequency of B-cells in the thymus. Finally, an abnormal CD4+ T-cell subset lacking Thy-1 and previously described in the periphery also appeared in the thymus and its frequency was strongly correlated with the expansion of B-cells in this organ. [less ▲]

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See detailRôle de la chirurgie carotidienne dans la prévention de l'infarctus cérébral
Limet, Raymond ULg; DESIRON, Quentin ULg; DETRY, Olivier et al

in Bulletin et Mémoires de l'Académie Royale de Médecine de Belgique (1994), 149(5-7), 299-305306-7

A significant part of transient or permanent cerebral ischemic attacks (CIA) are due to arterio-arterial emboli issued from carotid plaques. Surgery for carotid disobstruction aims to take out emboligenic ... [more ▼]

A significant part of transient or permanent cerebral ischemic attacks (CIA) are due to arterio-arterial emboli issued from carotid plaques. Surgery for carotid disobstruction aims to take out emboligenic plaques by endarterectomy (associated to angioplasty or not). The adversaries of surgical treatment sustain two main assertions: 1. carotid stenoses are not very dangerous, because the definitive thromboses they create are easily compensated by the development of collaterals, so that the risk for stroke is low. 2. this low and late risk of spontaneous carotid thrombosis is not greater than the immediate one following carotid surgery. Those objections have been encountered in randomized North American studies (Nascet [less ▲]

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See detailLa gynécologie dans les papyrus grecs de médecine
Marganne, Marie-Hélène ULg

in Acta Belgica Historiae Medicinae (1994), 7(4), 207-217

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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 detailItinéraire d’une fable : le Loup et le Chien
Pietquin, Paul ULg; Dachy, Françoise; Debrux, Thomas et al

in Etudes Classiques (Namur, Belgium) (1994), 62

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See detailGeometric control of a pyridoxal-catalyzed aldol condensation
Koh, John T.; Delaude, Lionel ULg; Breslow, Ronald

in Journal of the American Chemical Society (1994), 116(25), 11234-11240

A chiral cyclophane derivative of pyridoxal has been synthesized that has amino groups oriented specifically over one face of the cofactor. The compound catalyzes the formation of threonine and allo ... [more ▼]

A chiral cyclophane derivative of pyridoxal has been synthesized that has amino groups oriented specifically over one face of the cofactor. The compound catalyzes the formation of threonine and allo-threonine from glycine and acetaldehyde with enantioinductions that are a function of pH, reversing the optical selectivity between low pH and high pH. The stereochemical results are compared with those of structurally related pyridoxal cyclophanes that lack titratable catalytic groups. Explanations are advanced for this stereochemical reversal and for the otherwise surprising preference of most of these compounds to react on the more hindered face of the pyridoxal. Models indicate that the transamination intermediate is distorted by the transannular chain, and stereoelectronic arguments predict that this distortion should lead to reaction on the face that carries the chain, as observed. The stereochemical reversal with the attached (dimethylamino)alkyl group, as a function of pH, may reflect catalysis by the protonated form, but metal coordination by the basic form cannot be excluded. [less ▲]

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See detailThe experience of radical prostatectomy for locally confined prostate cancer in Liege.
Bouffioux, Christian ULg; de Leval, Jean ULg; Andrianne, Robert ULg et al

in Acta Urologica Belgica (1994), 62(1), 51-9

The authors report their experience of 148 radical prostatectomies performed for adeno-carcinoma. They expose the reasons which have led them to adopt this kind of treatment and the reasons explaining a ... [more ▼]

The authors report their experience of 148 radical prostatectomies performed for adeno-carcinoma. They expose the reasons which have led them to adopt this kind of treatment and the reasons explaining a nearly exponential increase of the frequency of the operation during the last 5 years. They underline the importance of lymphadenectomy and the safety of frozen sections of the nodes. The surgical technique is briefly commented and the (low) morbidity of the operation is reviewed. They compare the results of RPV to those of external radiotherapy, watchful attitude or immediate hormonal treatment and they conclude in insisting on the benefit of the surgical approach as far as indications (which are defined) are strictly followed. [less ▲]

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See detailCauses de mortalité et teneur en métaux lourds de Guillemots de Troïl Uria aalge échoués le long du littoral belge.
Bouquegneau, Jean-Marie ULg; Debacker, Virginie ULg; Antoine, Nathalie et al

in Bulletin de la Société Royale des Sciences de Liège (1994), 63(1-2), 211-217

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See detailDe l'utopie en architecture
Tieleman, David ULg

in A+ (1994)

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See detailDistribution of POC, PON and particulate Al, Cd, Cr, Cu, Pb, Ti, Zn and deltaC13 in the English Channel and adjacent areas
Dauby, Patrick ULg; Frankignoulle, Michel; Gobert, Sylvie ULg et al

in Oceanologica Acta (1994), 17(6), 643-657

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See detailIncidence des aménagements hydrauliques sur le contrôle du développement de la bilharziose (shistosomiase)
Pliez, A.; Moens, R.; Debouche, Charles ULg

in Annales de Gembloux (1994), (100), 53-65

Le développement des irrigations dans les zones tropicales et subtropicales du monde, pour augmenter les productions de nourriture, a provoqué la prolifération de maladies liées à l'eau comme la ... [more ▼]

Le développement des irrigations dans les zones tropicales et subtropicales du monde, pour augmenter les productions de nourriture, a provoqué la prolifération de maladies liées à l'eau comme la bilharziose (également appelée shistosomiase), la dengue, la filariose et l'onchocercose. [less ▲]

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See detailModulation of the acetylcholine- and substance P-induced pulmonary edema by calcitonin gene-related peptide in the rabbit.
Delaunois, Annie ULg; Gustin, Pascal ULg; Ansay, Michel ULg

in Journal of Pharmacology and Experimental Therapeutics (The) (1994), 270(1), 30-6

The effects of calcitonin gene-related peptide (CGRP) (6 x 10(-8) M) on hemodynamics and on pulmonary microvascular permeability were investigated in isolated, perfused rabbit lungs by measuring the ... [more ▼]

The effects of calcitonin gene-related peptide (CGRP) (6 x 10(-8) M) on hemodynamics and on pulmonary microvascular permeability were investigated in isolated, perfused rabbit lungs by measuring the arterial, capillary and venous pressures and the capillary filtration coefficient (Kf,c). CGRP was administered alone or in combination with capsaicin (10(-4) M), acetylcholine (ACh) (10(-11) M to 10(-7) M), substance P (SP) (10(-10) M to 10(-6) M) and serotonin (10(-4) M). The influence of a specific antagonist of CGRP receptors, CGRP8-37 (10(-8) M), on the pulmonary edema induced by these mediators was also considered. CGRP had no direct effect on the vascular pressures or on Kf,c. Capsaicin and serotonin induced an increase in Kf,c of 271 +/- 49% and 676 +/- 147% of base line, respectively. ACh and SP also increased the microvascular permeability, in proportion to the concentration. The effects of capsaicin, ACh and SP have been related to the activation of neurokinin NK1 receptors. Co-administration of CGRP with capsaicin and ACh enhanced the increase in Kf,c induced by these two drugs. By contrast, when co-injected with SP, CGRP inhibited the Kf,c increase induced by 10(-8) M and 10(-7) M of SP (P < .05) and significantly decreased the arterial and capillary pressures. CGRP also partly prevented the pulmonary edema induced by serotonin (P < .05). Pretreatment with CGRP8-37 partly prevented the effects of capsaicin and ACh on Kf,c but bestowed no protection against SP-induced pulmonary edema. These data suggest that CGRP is co-released with SP from the C-fibers upon the action of capsaicin and ACh in the rabbit lung. Because CGRP potentiated the pulmonary edema induced in capsaicin and ACh, but decreased the effects of SP, we hypothesize that CGRP exerts a positive retro-control on the release of neuropeptides by these fibers but can attenuate their effects on the target cells. [less ▲]

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See detailBilateral diaphragmatic paralysis in a pony
Amory, Hélène ULg; Lomba, Fernand; Lekeux, Pierre ULg et al

in Journal of the American Veterinary Medical Association [=JAVMA] (1994), 205(4), 587-591

An adult pony had a 1-month history of severe respiratory distress that was resistant to treatment and environmental changes. Results of blood gas analysis were indicative of alveolar hypoventilation ... [more ▼]

An adult pony had a 1-month history of severe respiratory distress that was resistant to treatment and environmental changes. Results of blood gas analysis were indicative of alveolar hypoventilation. Simultaneous recordings of thoracic and abdominal wall motion by inductance plethysmography, together with complete pulmonary mechanics evaluation that included transdiaphragmatic pressure monitoring, revealed complete passive behavior of the diaphragm during breathing. Because radiography, necropsy, and histologic examination did not reveal any major lesion to explain the clinical and functional observations, bilateral diaphragmatic paralysis was diagnosed [less ▲]

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See detailTheoretical Conformational-Analysis And Synthesis Of Analogs Of The Heptapeptide Antibiotic K-582-A
Decoen, Jl.; Wathelet, Bernard ULg; Demeuse, F. et al

in International Journal of Peptide and Protein Research (1994), 43(1),

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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 detailHooliganisme et extrémisme
Comeron, Manuel ULg

in Observatoire : Revue d'Action Sociale & Médico-Sociale (1994), 1

Les dimensions de racisme et d'extrémisme politique sont liés aux problèmes de sécurité et de violence posés par les supporters de football.

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See detailGender and diagnostic performance of the growth hormone response to clonidine for major depression : A large scale multicenter study
Schittecatte, Michel; Charles, Gerard; Machowski, R. et al

in American Journal of Psychiatry (The) (1994)

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See detailENANTIOSELECTIVE SYNTHESIS OF NCA (S)-L-([ALPHA-C-11]METHYL)-TRYPTOPHAN
Plenevaux, Alain ULg; Lemaire, Christian ULg; Delfiore, Guy et al

in Applied Radiation & Isotopes (1994), 45(6), 651-653

N.c.a. (S)-L-([alpha-C-11]methyl)-tryptophan was prepared by treatment at -78-degrees-C of (2S,3aR,8aS)-1,2-bis(-methoxycarbonyl)-1,2,3,3a,8,8a-hexahydropyrrolo[2, 3-b]-indole with lithium ... [more ▼]

N.c.a. (S)-L-([alpha-C-11]methyl)-tryptophan was prepared by treatment at -78-degrees-C of (2S,3aR,8aS)-1,2-bis(-methoxycarbonyl)-1,2,3,3a,8,8a-hexahydropyrrolo[2, 3-b]-indole with lithium diisopropylamide and [C-11]CH3I. After hydrolysis with HI and HPLC purification, the title compound was isolated with a radiochemical yield of 36% (EOB corrected) within 22 min; e.e. was shown > 97% (n = 20); specific activity was ranging between 0.8 and 1.2 Ci (30-45 GBq)/mu mol EOB. [less ▲]

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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 detailBovine Leukaemia Virus: biology and mode of transformation
Burny, A.; Willems, Luc ULg; Callebaut, I. et al

in Viruses and Cancer, Cambridge University Press (1994)

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See detailPerformances physiques et motrices d’enfants de l’enseignement fondamental engagés ou non dans un programme d’activités physiques quotidiennes
Cloes, Marc ULg; Delfosse, Catherine; Ledent, Maryse et al

in Revue de l'Education Physique (1994), 34(2-3), 59-68

La recherche d'un développement physique et moteur harmonieux et complet figure parmi les objectifs des différentes expériences proposant des activités physiques quotidiennes en milieu scolaire. La ... [more ▼]

La recherche d'un développement physique et moteur harmonieux et complet figure parmi les objectifs des différentes expériences proposant des activités physiques quotidiennes en milieu scolaire. La programmation de séances régulières d'éducation physique semble déboucher sur des niveau de condition physique supérieurs. ... [less ▲]

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See detailEtude des relations entre les microstructures obtenues par vieillissement isotherme et le comportement mécanique (fatigue, résilience) dans des alliages Zn-Al et Zn-Al-Cu
Lecomte-Beckers, Jacqueline ULg; Terziev, L.; Wegria, J.

in Revue de Métallurgie [=Revue de Métallurgie. Cahiers d'Informations Techniques] (1994), 91[5]

L’article présenté établit une corrélation entre le comportement mécanique (fluage, résilience) et les microstructures qui apparaissent au cours d’un traitement thermique isotherme (100 ou 250 °C) dans ... [more ▼]

L’article présenté établit une corrélation entre le comportement mécanique (fluage, résilience) et les microstructures qui apparaissent au cours d’un traitement thermique isotherme (100 ou 250 °C) dans des alliages Zn-Al et Zn-Al-Cu1. Le but est de mettre en évidence l’intérêt pratique des modifications structurales obtenues. On observe un meilleur résultat pour des échantillons vieillis pendant une semaine environ. La température de traitement la plus favorable est 250 °C. De plus, les alliages contenant du cuivre possèdent un meilleur comportement que les alliages binaires Zn-Al. [less ▲]

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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 detailRound Table Conference on Mediators of Sepsis--Brussels, Belgium, March 21-23, 1992
Lamy, Maurice ULg; Thijs, L. G.

in Intensive Care Medicine (1994), 20(3), 238-41

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See detailENANTIOSELECTIVE SYNTHESES OF NCA (S)-L-[BETA-C-11]-4-CHLOROPHENYLALANINE AND (S)-L-(ALPHA-METHYL)-[BETA-C-11]-4-CHLOROPHENYLALANINE
Plenevaux, Alain ULg; Al-Darwich, M. J.; Lemaire, Christian ULg et al

in Applied Radiation & Isotopes (1994), 45(3), 361-369

The radiolabeling of (S)-L-4-chlorophenylalanine and (S)-L-(alpha-methyl)-4-chlorophenylalanine were realized with carbon-11 at position beta through a radiochemical synthesis relying on the highly ... [more ▼]

The radiolabeling of (S)-L-4-chlorophenylalanine and (S)-L-(alpha-methyl)-4-chlorophenylalanine were realized with carbon-11 at position beta through a radiochemical synthesis relying on the highly enantioselective reaction between 4-chloro[alpha-C-11]benzyl bromide and the lithium enolate of (S)-1-(t-butyloxycarbonyl)-2-(t-butyl)-3-methyl-1,3-imidazolidine-4-one for (S)-L-[beta-C-11]-4-chlorophenylalanine and of (2S,5S)-1-(t-butyloxycarbonyl)-2-(t-butyl)-3,5-dimethyl-1,3-imidazolidin e-4-one for (S)-L-(alpha-methyl)-[beta-C-11]-4-chlorophenylalanine. Quantities of about 25-35 mCi were obtained at the end of synthesis, ready for injection, after hydrolysis and HPLC purification with a radiochemical yield of 19% corrected to EOB within 45 min. The enantiomeric excesses were shown to be greater than or equal to 97% for both molecules without chiral separation. The radiochemical and the chemical purities of the final compounds were greater than or equal to 98% and the specific activity at the end of synthesis ranged between 250-800 mCi/mu mol. [less ▲]

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See detailAttitude et participation d’enfants âgés de 8 à 10 ans à des activités physiques scolaires et parascolaires
Delfosse, Catherine; Horé, Muriel; Cloes, Marc ULg et al

in Revue de l'Education Physique (1994), 34(1), 27-34

Il est fréquemment fait appel aux concepts de motivation et d'attitude pour expliquer une large part de la qualité et de la quantité de participation des élèves aux activités qui leur sont proposées ... [more ▼]

Il est fréquemment fait appel aux concepts de motivation et d'attitude pour expliquer une large part de la qualité et de la quantité de participation des élèves aux activités qui leur sont proposées. Notre hypothèse de travail est née de l'idée que les enfants présentant une attitude favorable participeraient plus et mieux aux activités proposées que leurs condisciples présentant une attitude défavorable. ... [less ▲]

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See detailCinétique de récupération fonctionnelle de la ventilation pulmonaire après pontage aortocoronaire
Croisier, Jean-Louis ULg; Parisse, J.; Camus, G. et al

in Annales de Réadaptation et de Médecine Physique (1994), 37

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See detailPreliminary of observations on oribatid mites of riparian soils in Uruguay
Sarasola, M.; Vera, H.; Wauthy, G. et al

in Bulletin et Annales de la Société Royale Belge d’Entomologie = Bulletin en Annalen van de Koninklijke Belgische Vereniging voor Entomologie (1994), 130

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See detailMuscle Fibre Type and Size, and Muscle Capillary Density in Young Double-Muscled Blue Belgian Cattle
Stavaux, D.; Art, Tatiana ULg; Mc Entee, Kathleen ULg et al

in Zentralblatt für Veterinarmedizin. Reihe A (1994), 41(3), 229-236

Bovine muscle biopsies were analysed for fiber type and capillary density by the acid ATP-ase and amylase-PAS methods respectively. Samples obtained from Belgian blue double muscled (DM) calves were ... [more ▼]

Bovine muscle biopsies were analysed for fiber type and capillary density by the acid ATP-ase and amylase-PAS methods respectively. Samples obtained from Belgian blue double muscled (DM) calves were compared for their fibre type, size and vascularization with samples from Friesian (F) calves. The animals were sampled both at 2 and 7 months of age. Changes in histochemical composition occurring with ageing, independently of the breed, and differences related to the muscle sampled by comparing biopsies obtained from the longissimus dorsi (LD) and gluteobiceps (GB) muscles in animals of both breed were also investigated. Independently of age and muscle, fibre type I percentage and area were significantly higher in F than in DM muscles. Type IIa area was significantly larger in F than in DM, while fibre type IIb percentage and area were higher in DM. The number of capillaries/mm2 was significantly higher in F than in DM. Fibre type IIa and IIb percentage as well as the diameter of the three fibre types was significantly higher in the oldest animals. Finally, independently of age and breed, fibre type I and IIb percentages were significantly higher in LD but lower in GB. The results mainly demonstrated that Belgian blue DM muscles present a higher proportion of IIb fibres and a lower capillary supply than F muscles. [less ▲]

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See detailCaracteristiques des phosphatases acides de l'orge en condition de stress hydrique.
Ben-Naceur, M'B.; Paul, Roger ULg; Portetelle, Daniel ULg et al

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

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See detailEnantioselective synthesis of 6-[fluorine-18]-fluoro-L-dopa from no-carrier-added fluorine-18-fluoride.
Lemaire, Christian ULg; Damhaut, Philippe; Plenevaux, Alain ULg et al

in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (1994), 35(12), 1996-2002

METHODS: A trimethylammonium veratraldehyde triflate was synthesized and used as a precursor for the asymmetric synthesis of 6-[18F]fluoro-L-dopa. RESULTS: Its nucleophilic fluorination with 18F-fluoride ... [more ▼]

METHODS: A trimethylammonium veratraldehyde triflate was synthesized and used as a precursor for the asymmetric synthesis of 6-[18F]fluoro-L-dopa. RESULTS: Its nucleophilic fluorination with 18F-fluoride produced by the 18O(p,n)18F nuclear reaction on enriched 18O-water led to the corresponding no-carrier-added [18F]fluoroveratraldehyde (45 +/- 5% EOB). Diiodosilane was used to prepare the corresponding [18F]fluorobenzyl iodide (36.5 +/- 5.3% EOB). Akylation of (S)-1-tert-boc-2-tert-butyl-3-methyl-4-imidazolidinone with this electrophilic agent, hydrolysis and purification by preparative high-pressure liquid chromatography made 6-[18F]fluoro-L-dopa ready for human injection, in a 23% +/- 6% decay-corrected radiochemical yield. The enantiomeric purity and the specific activity were above 96% and 1 Ci/mumole respectively. CONCLUSION: Through this procedure, starting from 250 mCi of 18F-fluoride, multimillicurie amounts (32 +/- 8.5 mCi) of no-carrier-added 6-[18F]fluoro-L-dopa are now available at the end of synthesis (90 min) with a good radiochemical purity (more than 98%). [less ▲]

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See detailDe l'utopie en architecture. Une technique pour le Corbusier ?
Tieleman, David ULg

in Art&Fact (1994), 13

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See detailSynthesis and biodistribution of [5-131I]iodotropapride: a potential D2 dopamine receptor imaging agent.
Cantineau, Robert; Guillaume, Marcel; Damhaut, Philippe et al

in Nuclear Medicine & Biology (1994), 21(2), 255-62

[5-131I]Iodotropapride is a benzamidic compound which displays high affinity and selectivity for dopaminergic receptors. It was prepared from the corresponding brominated compound by a nucleophilic ... [more ▼]

[5-131I]Iodotropapride is a benzamidic compound which displays high affinity and selectivity for dopaminergic receptors. It was prepared from the corresponding brominated compound by a nucleophilic substitution with [131I]iodine (t1/2 = 8.02 days, E gamma = 364 keV) based on the use of Cu(I) as catalyst and high specific activity of [131I]NaI. After i.v. injection in rats the tracer crosses the blood-brain barrier (0.42 +/- 0.06% of injected dose in the total brain) and demonstrates a high affinity binding to the striatum. The striatum-to-cerebellum ratio increases with time and reaches values of 9 and 22 at 30 and 120 min after injection, respectively. This specific uptake in the striatum is saturable and can be blocked by pretreatment with different D2 antagonists. When labeled with 123I (t1/2 = 13 h, E1 = 159 keV), the corresponding [123I]iodotropapride may be useful for the investigation of the D2 dopamine receptors in humans with single photon emission computer tomography (SPECT). [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 detailEpidural anesthesia impairs both central and peripheral thermoregulatory control during general anesthesia.
Joris, Jean ULg; Ozaki, Makoto; Sessler, Daniel I et al

in Anesthesiology (1994), 80(2), 268-77

BACKGROUND: The authors tested the hypotheses that: (1) the vasoconstriction threshold during combined epidural/general anesthesia is less than that during general anesthesia alone; and (2) after ... [more ▼]

BACKGROUND: The authors tested the hypotheses that: (1) the vasoconstriction threshold during combined epidural/general anesthesia is less than that during general anesthesia alone; and (2) after vasoconstriction, core cooling rates during combined epidural/general anesthesia are greater than those during general anesthesia alone. Vasoconstriction thresholds and heat balance were evaluated under controlled circumstances in volunteers, whereas the clinical importance of intraoperative thermoregulatory vasoconstriction was evaluated in patients. METHODS: Five volunteers were each evaluated twice. On one of the randomly ordered days, epidural anesthesia (approximately T9 dermatomal level) was induced and maintained with 2-chloroprocaine. On both study days, general anesthesia was induced and maintained with isoflurane (0.7% end-tidal concentration), and core hypothermia was induced by surface cooling and continued for at least 1 h after fingertip vasoconstriction was observed. Patients undergoing colorectal surgery were randomly assigned to combined epidural/enflurane anesthesia (n = 13) or enflurane alone (n = 13). In appropriate patients, epidural anesthesia was maintained by an infusion of bupivacaine. The core temperature that triggered fingertip vasoconstriction identified the threshold. RESULTS: In the volunteers, the vasoconstriction threshold was 36.0 +/- 0.2 degrees C during isoflurane anesthesia alone, but significantly less, 35.1 +/- 0.7 degrees C, during combined epidural/isoflurane anesthesia. Cutaneous heat loss and the rates of core cooling were similar 30 min before vasoconstriction with and without epidural anesthesia. In the 30 min after vasoconstriction, heat loss decreased 33 +/- 13 W when the volunteers were given isoflurane alone, but only 8 +/- 16 W during combined epidural/isoflurane anesthesia. Similarly, the core cooling rates in the 30 min after vasoconstriction were significantly greater during combined epidural/isoflurane anesthesia (0.8 +/- 0.2 degrees C/h) than during isoflurane alone (0.2 +/- 0.1 degrees C/h). In the patients, end-tidal enflurane concentrations were slightly, but significantly, less in the patients given combined epidural/enflurane anesthesia (0.6 +/- 0.2% vs. 0.8 +/- 0.2%). Nonetheless, the vasoconstriction threshold was 34.5 +/- 0.6 degrees C in the epidural/enflurane group, which was significantly less than that in the other patients, 35.6 +/- 0.8 degrees C. When the study ended after 3 h of anesthesia, patients given combined epidural/enflurane anesthesia were 1.2 degrees C more hypothermic than those given general anesthesia alone. The rate of core cooling during the last hour of the study was 0.4 +/- 0.2 degrees C/h during combined epidural/enflurane anesthesia, but only 0.1 +/- 0.3 degrees C/h during enflurane alone. CONCLUSIONS: These data indicate that epidural anesthesia reduces the vasoconstriction threshold during general anesthesia. Furthermore, the markedly reduced rate of core cooling during general anesthesia alone illustrates the importance of leg vasoconstriction in maintaining core temperature. [less ▲]

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See detailFavoriser la reproduction des poissons à Lanaye.
Poncin, Pascal ULg; Keulen, C.

in Pêcheur Belge (Le) (1994), 6

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See detailChromosomal localization of the callipyge gene in sheep (Ovis aries) using bovine DNA markers
Cockett, N. E.; Jackson, S. P.; Shay, T. D. et al

in Proceedings of the National Academy of Sciences of the United States of America (1994), 91

A mutation causing muscular hypertrophy, with associated leanness and improved feed efficiency, has been recently identified in domestic sheep (Ovis aries). Preliminary results indicate that an autosomal ... [more ▼]

A mutation causing muscular hypertrophy, with associated leanness and improved feed efficiency, has been recently identified in domestic sheep (Ovis aries). Preliminary results indicate that an autosomal dominant gene may be responsible for this economically advantageous trait. We have exploited the conservation in sequence and chromosomal location of DNA markers across Bovidae to map the corresponding callipyge locus to ovine chromosome 18 using a battery of bovine chromosome 21 markers. Chromosomal localization of the ovine callipyge locus is the first step toward positional cloning of the corresponding gene. [less ▲]

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See detailL'autisme et la pensée du temps
Gauthier, Jean-Marie ULg

in Recherches du centre international de psychosomatique (1994), 1

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See detailOpportunities for fine gold recovery from a copper flotation circuit using Knelson concentrator
Patchejieff, B.; Gaydardzhiev, Stoyan ULg; Lazarov, D.

in Minerals Engineering (1994), 7(2/3), 405-408

Experiments aimed at determination of the character of the gold observed in a copper ore processed by flotation, and also to evaluate the possibilities of improvement of the total gold recovery have been ... [more ▼]

Experiments aimed at determination of the character of the gold observed in a copper ore processed by flotation, and also to evaluate the possibilities of improvement of the total gold recovery have been carried out. The gravity equipment used was a 7.5" Knelson screen hydrostatic concentrator, reported of being capable of treatment and upgrading of up to 1000 times raw material with about 30% hypothetical concentration of heavy flotation sized particles. The gold-to-sulfides ratio obtained during the various runs was chosen as a general criterion for the type of gold presented (free or locked) and for the gravity approach feasibility. [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 detailCloning And Characterization Of Mn, A Human Tumor-Associated Protein With A Domain Homologous To Carbonic-Anhydrase And A Putative Helix-Loop-Helix Dna-Binding Segment
Pastorek, J.; Pastorekova, S.; Callebaut, I. et al

in Oncogene (1994), 9(10),

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See detailEtude épidémiologique de la toxoplasmose chez les femmes enceintes à Amiens (Picardie). Nécessité d'une enquête nationale
Carme, Bernard; Lenne, Evelyne; Tirard, Véronique et al

in Médecine et Maladies Infectieuses (1994), 24

L'étude avait pour but d'évaluer le niveau d'immunité vis à vis de la toxoplasmose des femmes venant d'accoucher à Amiens entre mars 1993 et avril 1994 ainsi que leur connnaissance des mesures préventives ... [more ▼]

L'étude avait pour but d'évaluer le niveau d'immunité vis à vis de la toxoplasmose des femmes venant d'accoucher à Amiens entre mars 1993 et avril 1994 ainsi que leur connnaissance des mesures préventives vis à vis de cette parasitose. Cette étude a permis de mettre en évidence la bonne connaissance des mesures préventives vis à vis de la toxoplasmose chez les femmes non immunes. Ceci a permis également de préciser les données épidémiologiques de la toxoplasmose à Amiens. Le choix d'un protocole incluant les femmes au moment de l'accouchement pourrait être complété par celui de femmes en début de grosesse pour éviter d'exclure les interruptions de grossesse. Cette étude devrait déboucher sur une enquête nationale qui permettrait de préciser l'épidémiolgoie de la toxoplasmose en France. [less ▲]

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See detailDesign and modeling of new PAF antagonists - 1,4-bis-(3',4',5'-trimethoxybenzoyl)-2-substituted carbonyloxymethyl piperazines
Heymans, Françoise; Lamouri, Aazdine; Batt, Jean-Pierre et al

in Journal of Lipid Mediators and Cell Signalling (1994), 10(1-2), 153-154

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See detailConséquences microcirculatoires et cellulaires de l'endotoxine
D'Orio, Vincenzo ULg

in Réanimation (1994), 1

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See detailPropriétés antifongiques de la microflore sporulée du netetu.
N'dir, B.; Hbid, Ch.; Cornelius, C. et al

in Cahiers Agricultures (1994), 3

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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 detailGravitational lenses
Refsdal, S.; Surdej, Jean ULg

in Reports on Progress in Physics (1994), 57

According to Einstein's general theory of relativity, a gravitational field bends electromagnetic waves in much the same way as low atmospheric air layers curve the trajectory of a propagating light ray ... [more ▼]

According to Einstein's general theory of relativity, a gravitational field bends electromagnetic waves in much the same way as low atmospheric air layers curve the trajectory of a propagating light ray. Large mass concentrations in the universe can thereby act as a type of lens, a gravitational lens. After briefly reviewing the history of gravitational lensing since the early thoughts of Newton in 1704 until the serendipitous discovery of the first gravitational lens system in 1979, the authors recall the basic principles of atmospheric and gravitational lensing. They then describe a simple optical gravitational lens experiment which has the merit of accounting for all types of image configuration observed among currently known gravitational lens systems. Various types of gravitational lens models are described in detail as well as the resulting image properties of a distant source. An updated list as well as colour illustrations of the best known examples of multiply imaged quasars, radio rings and giant luminous arcs and arclets are presented. Some of these observations are discussed in detail. Finally, the authors show how it is possible to use gravitational lensing as a cosmological and astrophysical tool, the most interesting applications being the determination of the Hubble parameter H[SUB]0[/SUB], the mass of very distant lensing galaxies as well as the distribution of luminous and dark matter in the universe. They also show how to determine the size and structure of distant quasars from observations of micro-lensing effects. [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 detailHigh-dose aprotinin reduces blood loss in patients undergoing total hip replacement surgery
Janssens, Marc ULg; Joris, Jean ULg; David, Jean-Louis et al

in Anesthesiology (1994), 80

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See detailEffect of dopamine and baclofen on N-methyl-D-aspartate-induced burst firing in rat ventral tegmental neurons.
Seutin, Vincent ULg; Johnson, S. W.; North, R. A.

in Neuroscience (1994), 58(1), 201-6

Intracellular microelectrode recordings were made from dopamine-containing neurons of the ventral tegmental area or substantia nigra zona compacta in rat brain slices in vitro. The firing pattern of the ... [more ▼]

Intracellular microelectrode recordings were made from dopamine-containing neurons of the ventral tegmental area or substantia nigra zona compacta in rat brain slices in vitro. The firing pattern of the neurons was switched from a tonic, single-spike pattern to a burst firing mode by adding N-methyl-D-aspartate (20 microM) to the superfusing solution; after adding tetrodotoxin the membrane potential underwent rhythmical oscillations of 20-40 mV at 0.5-2 Hz. Baclofen (1 microM) and dopamine (30 microM) hyperpolarized the neurons; when the potential was restored to its original level, the oscillations of potential and/or burst firing were not observed, but the tonic firing pattern was restored. These effects of baclofen and dopamine were prevented by barium (1 mM), which also prevented the membrane hyperpolarization. Oscillations of membrane current of a similar frequency were observed when the somatic membrane was voltage-clamped at -60 mV; these were also blocked by barium (1 mM). It is concluded that the oscillations in membrane potential observed with N-methyl-D-aspartate are generated predominantly at a dendritic location which is not voltage-clamped with an electrode at the soma. Baclofen and dopamine inhibit the oscillations by increasing the potassium conductance and hyperpolarizing the dendrites. [less ▲]

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See detailAttenuation Of Bovine Leukemia-Virus By Deletion Of R3 And G4 Open Reading Frames
Willems, Luc ULg; Kerkhofs, P.; Dequiedt, Franck ULg et al

in Proceedings of the National Academy of Sciences of the United States of America (1994), 91(24),

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See detailMachine learning, neural networks and statistical pattern recognition for voltage security: a comparative study
Wehenkel, Louis ULg; Van Cutsem, Thierry ULg; Pavella, Mania ULg et al

in International Journal of Intelligent Systems (1994), 2

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See detailHeterogeneous conversion of N2O5 to HNO3 in the post-Mount Pinatubo eruption stratosphere
Rinsland, Curtis P.; Gunson, Michaël R.; Abrams, M. C. et al

in Journal of Geophysical Research (1994), 99(D4), 8213-8219

Simultaneous stratospheric volume mixing ratio (VMR) profiles of dinitrogen pentoxide (N2O5) and nitric acid (HNO3) at sunrise between 25-degrees-N and 15-degrees-S latitude and profiles of HNO3 at sunset ... [more ▼]

Simultaneous stratospheric volume mixing ratio (VMR) profiles of dinitrogen pentoxide (N2O5) and nitric acid (HNO3) at sunrise between 25-degrees-N and 15-degrees-S latitude and profiles of HNO3 at sunset between 42-degrees-S and 53-degrees-S latitude have been derived from 0.01 cm-1 resolution infrared solar occultation spectra recorded 9 1/2 months after the massive eruption of the Mount Pinatubo volcano in the Philippine Islands. The measurements were obtained by the atmospheric trace molecule spectroscopy (ATMOS) Fourier transform spectrometer during the ATLAS 1 shuttle mission (March 24 to April 2, 1992). The measured HNO3 VMRs are higher at all altitudes and latitudes than corresponding values measured by the limb infrared monitor of the stratosphere (LIMS) instrument during the same season in 1979, when the aerosol loading was near background levels. The largest relative increase in the HNO3 VMR occurred near the equator at 30-km altitude, where the ATMOS/ATLAS 1 values are about a factor of 2 higher than the LIMS measurements. Two-dimensional model calculations show that the increase in HNO3 and the ATMOS/ATLAS 1 measurement of a steep decrease in the N2O5 VMR below 30 km can be explained by the enhanced conversion of N2O5 to HNO3 on the surfaces of the Mount Pinatubo sulfate aerosols. Our profile results demonstrate the global impact of the N2O5 + H2O --> 2HNO3 heterogeneous reaction in altering the partitioning of stratospheric odd nitrogen after a major volcanic eruption. [less ▲]

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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 detailEditorial comment intensive care
Lamy, Maurice ULg

in Current Opinion in Anaesthesiology (1994), 7

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See detailLes indices de déformation plio-quaternaire de la bordure occidentale du bassin des Iullemenden dans la région de Niamey (Niger).
Vicat, Jean-Paul; Léger, Jean-Marc; AHMED, Y et al

in Revue de Géographie Alpine (1994), 5

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