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See detailThe effect of electron-phonon interaction in iron-doped III-V cubic semiconductors
Colignon, David ULg; Kartheuser, Eduard ULg; Villeret, Murielle

in Journal of Physics : Condensed Matter (2000), 12(12), 2691-2699

A theoretical study of optical absorption and emission measurements of Fe2+ as a substitutional impurity in InP and GaP is presented. A new interpretation of the low-temperature absorption spectrum is ... [more ▼]

A theoretical study of optical absorption and emission measurements of Fe2+ as a substitutional impurity in InP and GaP is presented. A new interpretation of the low-temperature absorption spectrum is proposed based on a weak Jahn-Teller interaction between the electronic excited states and a local gap mode of Gamma(5) symmetry. The model also includes the crystal potential, hybridization with the orbitals of the ligands of the host crystal, spin-orbit interaction and a weak dynamic Jahn-Teller coupling of the orbital ground state of Fe2+ with transverse acoustic phonons of Gamma(3) symmetry. The theoretical model describes with good accuracy the measured positions and relative intensities of the spectral lines. In addition, the mass dependence of the local gap mode of Gamma(5) symmetry reproduces the general features of the fine structures associated with the isotopic shifts of the zero-phonon line and the contribution to the isotopic shifts arising from the difference in zero-point energy between the initial and final states of the transition is evaluated. [less ▲]

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See detailGeometric quantities associated to differential operators
Mathonet, Pierre ULg

in Communications in Algebra (2000), 28(2), 699-718

Denote by F_lambda the space of fields of tensor densities of weight -lambda over a manifold M. The space D^p_{lambda,mu} of differential operators of order at most p that map F_lambda onto F_mu are ... [more ▼]

Denote by F_lambda the space of fields of tensor densities of weight -lambda over a manifold M. The space D^p_{lambda,mu} of differential operators of order at most p that map F_lambda onto F_mu are modules over the Lie algebra of vector fields Vect(M). We compute all the Vect(M)-invariant mappings from D^p_{lambda,mu} onto F_nu. [less ▲]

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See detailEvidence for expression of some Microtubule-associated Protein 1B in neurons as a plasma membrane glycoprotein.
Franzen, Rachelle ULg; Tanner, Sandy; Jaffe, Howard et al

in Journal of Neurochemistry (2000), 75

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See detailImmunocastration of farm animals
Portetelle, Daniel ULg; Haezebroeck, Valérie; Mortiaux, Frédéric et al

in Bases (2000), 4

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See detailCas clinique pour la rubrique “ Imagerie médicale ”
Noels, C.; Busoni, Valeria ULg

in Pratique Vétérinaire Equine (2000)

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See detailThe relationship between airways inflammation and asthma severity.
Louis, Renaud ULg; Lau, L. C.; Bron, A. O. et al

in American Journal of Respiratory & Critical Care Medicine (2000), 161(1), 9-16

In order to investigate the relationship between airways inflammation and disease severity, and improve the understanding of persistent asthma, 74 asthmatics, with disease severity ranging from ... [more ▼]

In order to investigate the relationship between airways inflammation and disease severity, and improve the understanding of persistent asthma, 74 asthmatics, with disease severity ranging from intermittent, to mild to moderate and severe persistent (classified according to the Global Initiative for Asthma [GINA] guidelines), and 22 nonatopic control subjects were studied using the method of induced sputum. Sputum was analyzed for total and differential cell counts concentrations of albumin, and levels of eosinophil cationic protein (ECP), myeloperoxidase (MPO), and tryptase, inflammatory mediators reflecting eosinophil, neutrophil, and mast cell activation. Asthma severity (assessed by FEV(1), peak expiratory flow [PEF] variability, and daily symptom scores) and methacholine airways responsiveness were related to sputum eosinophilia and ECP. In addition, sputum neutrophilia and MPO levels correlated, albeit weakly, with PEF variability and symptom scores, respectively. Tryptase concentrations were raised in mild to moderate asthmatics. Albumin concentrations were significantly raised across the spectrum of asthma severity and correlated with those of tryptase and ECP. Despite treatment with either high doses of inhaled corticosteroids or oral corticosteroids, prominent eosinophilic inflammation with raised ECP was noted. This study points to persistent, disease severity-related airways inflammation in asthma, involving eosinophils, mast cells, and neutrophils, which is evident despite treatment with corticosteroids. [less ▲]

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See detailCoupled thermo-magnetic simulation of a foil-winding transformer connected to a non-linear load
Driesen, Johan; Deliège, Geoffrey ULg; Belmans, Ronnie et al

in IEEE Transactions on Magnetics (2000), 36(4), 1381-1385

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See detailThymic neuroendocrine self-antigens. Role in T-cell development and central T-cell self-tolerance
Geenen, Vincent ULg; Martens, Henri ULg; Brilot, Fabienne et al

in Annals of the New York Academy of Sciences (2000), 917

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See detailL'humanisme face au terrorisme
Seron, Vincent ULg

in Cahiers de défense sociale (2000)

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See detailBand-by-band decompositions of the Born effective charges
Ghosez, Philippe ULg; Gonze, X.

in Journal of Physics : Condensed Matter (2000), 12(43), 9179-9188

The Born effective charge, Z*, that describes the polarization created by collective atomic displacements, can be computed from first principles following different techniques. We establish the ... [more ▼]

The Born effective charge, Z*, that describes the polarization created by collective atomic displacements, can be computed from first principles following different techniques. We establish the connections existing between these different formulations, and analyse the related band-by-band decompositions. We show that unlike for the full Z*, the different band-by-band values are not equal, and emphasize that one of them has a natural physical meaning in terms of Wannier functions. [less ▲]

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See detailRésultats d'une enquête internationale en mathématiques
Monseur, Christian ULg

in Cahiers du Service de Pédagogie Expérimentale (SPE) (2000), (3-4), 13-20

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See detailBoundedness properties for time-varying nonlinear systems
Peuteman, Joan; Aeyels, Dirk; Sepulchre, Rodolphe ULg

in SIAM Journal on Control & Optimization (2000), 39(5), 1408-1422

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See detailDetermination of Alpha-Solanine and Alpha-Chaconine in Potatoes by High-Performance Thin-Layer Chromatography/Densitometry
Bodart, P.; Kabengera, C.; Noirfalise, Alfred ULg et al

in Journal of AOAC International (2000), 83(6, Nov-Dec), 1468-73

A high-performance thin-layer chromatographic (HPTLC) method was used to determine the glycoalkaloids alpha-solanine and alpha-chaconine in potatoes. Alpha-solanine and alpha-chaconine are extracted from ... [more ▼]

A high-performance thin-layer chromatographic (HPTLC) method was used to determine the glycoalkaloids alpha-solanine and alpha-chaconine in potatoes. Alpha-solanine and alpha-chaconine are extracted from dehydrated potatoes with boiling methanol-acetic acid (95 + 5, v/v). The analytes are separated on a Silica Gel 60 F254 HPTLC plate by a saturated mixture of dichloromethane-methanol-water-concentrated ammonium hydroxide (70 + 30 + 4 + 0.4, v/v), which is used for vertical development of the plate up to a distance of 85 mm. For visualization, the plate is dipped 3 times into a modified Carr-Price reagent, 20% (w/v) antimony(III) chloride in acetic acid-dichloromethane (1 + 3, v/v), and subsequently heated on a hot plate at 105 degrees C for 5 min. The glycoalkaloids all appear as red chromatographic zones on a colorless background. Densitometric quantification is performed at 507 nm by reflectance scanning. After determination of the appropriate response function, the proposed method was validated. Good results with respect to linearity, accuracy, and precision were obtained in the concentration range studied. [less ▲]

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See detailProtective Effects Of A Live Attenuated Bovine Leukaemia Virus Vaccine With Deletion In The R3 And G4 Genes
Reichert, M.; Cantor, Gh.; Willems, Luc ULg et al

in Journal of General Virology (2000), 81

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See detailNew strategy for the validation of chromatographic bioanalytical methods
Chapuzet, E.; Mercier, N.; Bervoas-Martin, S. et al

in STP Pharma Pratiques (2000), 10(1), 21-38

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See detailPrincipal component analysis based on robust estimators of the covariance or correlation matrix: Influence functions and efficiencies
Croux, C.; Haesbroeck, Gentiane ULg

in Biometrika (2000), 87(3), 603-618

A robust principal component analysis can be easily performed by computing the eigenvalues and eigenvectors of a robust estimator of the covariance or correlation matrix. In this paper we derive the ... [more ▼]

A robust principal component analysis can be easily performed by computing the eigenvalues and eigenvectors of a robust estimator of the covariance or correlation matrix. In this paper we derive the influence functions and the corresponding asymptotic variances for these robust estimators of eigenvalues and eigenvectors. The behaviour of several of these estimators is investigated by a simulation study. It turns out that the theoretical results and simulations favour the use of S-estimators, since they combine a high efficiency with appealing robustness properties. [less ▲]

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See detailExpression And Activity Of Antioxidant Enzymes During Potato Tuber Dormancy
Rojas-Beltran, Ja.; Dejaeghere, F.; Kotb, Ma. et al

in Potato Research (2000), 43(4),

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See detailMicropore size distributions of activated carbons
Blacher, Silvia ULg; Sahouli, Bendida; Heinrichs, Benoît ULg et al

in Langmuir (2000), 16(16), 6754-6756

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See detailDo estrogens effectively prevent osteoporosis-related fractures?
Reginster, Jean-Yves ULg; Bruyère, Olivier ULg; Audan, M. et al

in Calcified Tissue International (2000), 67

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See detailLa place quantitative et qualitative de la viande dans notre alimentation.
Mary, Arnaud; Sindic, Marianne ULg

in Dieta (2000), (22), 6-11

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See detailEffects of Ephedrine on the Onset Time of Neuromuscular Block and Intubating Conditions after Cisatracurium: Preliminary Results
Albert, Franz ULg; Hans, Pol ULg; Bitar, Yasser et al

in Acta Anaesthesiologica Belgica (2000), 51(3), 167-71

We studied the effects of intravenous ephedrine on the onset time and the intubating conditions 2 min after a bolus dose of cisatracurium (0.15 mg kg-1). Thirty patients anaesthetized with sufentanil and ... [more ▼]

We studied the effects of intravenous ephedrine on the onset time and the intubating conditions 2 min after a bolus dose of cisatracurium (0.15 mg kg-1). Thirty patients anaesthetized with sufentanil and propofol were randomly divided in 2 groups to receive either ephedrine (70 micrograms.kg-1) or saline, 5 s before propofol. Cisatracurium was administered after loss of consciousness. Neuromuscular block was assessed at the adductor pollicis using accelography. Tracheal intubation was performed 2 min after cisatracurium injection and rated as excellent, good, poor or bad. At intubation, neuromuscular block (% height of control T1) was greater in patients receiving ephedrine (36.1 +/- 25.8% vs 57.9 +/- 25.1%) (mean +/- SD). The frequency of excellent intubating conditions was higher after ephedrine (86.6%) than after saline (40.0%). The onset time of cisatracurium was shorter after ephedrine (167 +/- 64.8 s vs 234.9 +/- 63.1 s). Thus, a low dose of ephedrine given before induction of anaesthesia improves the intubating conditions 2 min after 0.15 mg kg-1 cisatracurium and this effect likely relates to a quicker onset of neuromuscular block. [less ▲]

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See detailCalendes et calendriers: du temps cyclique au temps historique
Biémont, Emile ULg

in Ciel (Le) (2000), 62

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See detailEffet de l’ammoniac sur la fibre C impliquée dans le réflexe de la toux chez le porc
Moreaux, B.; Nemmar, R.; Gustin, Pascal ULg

in Journées de la Recherche Porcine en France (2000), 32

The effect of ammonia on the C-fibre which is involved in the citric acid induced coughing reflex was assessed. The piglets were exposed during a period of 24 hours or 4 days to a concentration of 15 or ... [more ▼]

The effect of ammonia on the C-fibre which is involved in the citric acid induced coughing reflex was assessed. The piglets were exposed during a period of 24 hours or 4 days to a concentration of 15 or 30 ppm ammonia in an inhalation chamber . During this challenge, the animais underwent cough induction tests at two days intervals. Another group was exposed to ammonia (30 ppm) for 48 hours, after this period, substance P was assayed in liquids collected from broncho-alvealor and tracheal washings (BAL and TAL) and in tracheal and airway mucosa . Ammonia (30 ppm) induced an inhibition 0f the coughing reflex in pigs. The minimum period of exposure necessary to provoke this effect was 48 hours. The same ammonia concentration aiso induced o significant increase in substance P concentrations in BAL and TAL and a significant decrease in concentrations of the tracheal mucosa. We conclude that ammonia at o concentration of 30 ppm inhibits the citric acid induced coughing reflex. The effect was partly mediated by the release of substance P from the C-fibre. [less ▲]

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See detailConstructions and applications of wavelets in Sobolev spaces
Bastin, Françoise ULg

in Revista Ciencias Matematicas (2000), 18(2), 145-177

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See detailMutation in exon 5 of bovine prolactin gene is not associated with milk traits in Holstein bulls.
Parmentier, Isabelle; Gengler, Nicolas ULg; Laliberte, P. et al

in Journal of Animal Science (2000), 78(Suppl 1),

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See detailCritical points and reaction paths characterization on a potential energy hypersurface
Ramquet, Marie-Noëlle; Dive, Georges ULg; Dehareng, Dominique ULg

in Journal of Chemical Physics (2000), 112(11), 4923-4934

Most of the time, the definitions of minima, saddle points or more generally order p (p=0,...,n) critical points, do not mention the possibility of having zero Hessian eigenvalues. This feature reflects ... [more ▼]

Most of the time, the definitions of minima, saddle points or more generally order p (p=0,...,n) critical points, do not mention the possibility of having zero Hessian eigenvalues. This feature reflects some flatness of the potential energy hypersurface in a special eigendirection which is not often taken into account. Thus, the definitions of critical points are revisited in a more general framework within this context. The concepts of bifurcation points, branching points, and valley ridge inflection points are investigated. New definitions based on the mathematical formulation of the reaction path are given and some of their properties are outlined. (C) 2000 American Institute of Physics. [S0021-9606(00)01110-7]. [less ▲]

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See detailPalladium-silver sol-gel catalysts for selective hydrodechlorination of 1,2-dichloroethane into ethylene II. Surface composition of alloy particles
Heinrichs, Benoît ULg; Noville, Francis ULg; Schoebrechts, Jean-Paul et al

in Journal of Catalysis (2000), 192(1), 108-118

The surface composition of alloy particles in Pd-Ag/SiO2 hydrodechlorination (HDC) sol-gel catalysts has been determined by combining three experimental techniques, carbon monoxide chemisorption, X-ray ... [more ▼]

The surface composition of alloy particles in Pd-Ag/SiO2 hydrodechlorination (HDC) sol-gel catalysts has been determined by combining three experimental techniques, carbon monoxide chemisorption, X-ray diffraction, and transmission electron microscopy, Values obtained through this method show a very marked silver enrichment of the surface, as expected: as a consequence of the important gap between palladium and silver surface energies. These values are in complete agreement with surface composition curves calculated in other studies by means of Auger electron spectroscopy and infrared spectroscopy. The influence of sample pretreatment temperature as well as the influence of carbon monoxide on surface composition are discussed. (C) 2000 Academic Press. [less ▲]

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See detailConséquences de l'infection des cervidés par des alpha-herpèsvirus apparentés au virus de l'IBR
Keuser, V.; Thiry, Etienne ULg

in Point Vétérinaire (2000), 31

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See detailExample of application of the new strategy proposed for the validation of chromatographic bioanalytical methods
Chapuzet, E.; Mercier, N.; Bervoas-Martin, S. et al

in STP Pharma Pratiques (2000), 10(2), 79-101

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See detailLes arcanes de la prescription de l'action publique
Jacobs, Ann ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2000)

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See detailIntégration du transfert de rugosité à un modèle de laminage à froid
Collette, Caroline; Counhaye, Christian; Ponthot, Jean-Philippe ULg

in Revue de Métallurgie [=Revue de Métallurgie. Cahiers d'Informations Techniques] (2000)

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See detailSegmentation of multispectral images in optical metallography
Pirard, Eric ULg; Bertholet, Vincent

in Revue de Métallurgie - Sciences et Génie des Matériaux (2000), Fév. 2000

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See detailRelative Accuracy of the Identification of Ovarian Structures in the Cow by Ultrasonography and Palpation Per Rectum
Hanzen, Christian ULg; Pieterse, M.; Szenci, Otto et al

in Veterinary Journal (2000), 159(2), 161-170

Manual palpation or ultrasonographic examination of the cow's genital tract are currently used by veterinarians involved in reproductive management, but knowledge of the potential and the limitations of ... [more ▼]

Manual palpation or ultrasonographic examination of the cow's genital tract are currently used by veterinarians involved in reproductive management, but knowledge of the potential and the limitations of both methods is important to obtain an optimal accuracy in the diagnosis of physiological and pathological ovarian structures. This review presents the main features of manual and ultrasonographic characteristics of follicles, corpora lutea (with or without a cavity), follicular and lutenized cysts and the reliability of the two methods is compared. Manual diagnosis of follicles <10 mm is rather inaccurate, but ultrasound offers the possibility to diagnose follicles <5 mm and to measure their inner diameter. The predictive values of the presence or absence of a corpus luteum as determined by palpation are similar (78 vs. 75%). Manual or ultrasonographic diagnosis of the growing or regressing corpus luteum is rather difficult. The positive predictive value of a mature corpus luteum diagnosed by ultrasonography is lower (87%) than the negative predictive value (92%). Compared to manual palpation, ultrasonography permits a better estimation of the number and to determine more precisely the size of the mature corpus luteum. The positive values for follicular cysts diagnosed by palpation or by ultrasonography are 66 and 74% respectively, and for luteal cysts, the values are 66 and 85%, respectively. Manual palpation or ultrasonography are useful tools to diagnose ovarian structures in the cow. The accuracy of such methods can be enhanced by securing information on the reproductive history of the animal, palpation of uterine horns, vaginal examination or progesterone determinations. [less ▲]

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See detailMeeting report. Topics in ecology: structure and function of plants and ecosystems.
Bogaert, Jan ULg

in IALE Bulletin (2000), 18(6), 4

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See detailBulletin bibliographique de la Société Rencesvals, 1999-2000
Horrent, Jacques ULg; Henrard, Nadine ULg

in Bulletin bibliographique de la Société Rencesvals (2000), (31), 208

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See detailTreatment of diabetes in patients with severe obesity.
Scheen, André ULg

in Biomedicine & Pharmacotherapy (2000), 54(2), 74-9

Besides genetic predisposition, obesity is the most important risk factor for the development of diabetes mellitus, and weight reduction has been shown to markedly improve blood glucose control in obese ... [more ▼]

Besides genetic predisposition, obesity is the most important risk factor for the development of diabetes mellitus, and weight reduction has been shown to markedly improve blood glucose control in obese subjects with type 2 diabetes. Therapeutic strategies for the obese diabetic patient include: 1) promoting weight loss through lifestyle modifications (hypocaloric diet and exercise) and anti-obesity drugs (orlistat, sibutramine, etc.); 2) improving blood glucose control, essentially through the reduction of insulin resistance (metformin, eventually thiazolidinediones) or insulin need (alpha-glucosidase inhibitors) and, at a later stage, the correction of defective insulin secretion (sulphonylureas, repaglinide) or low circulating insulin levels (exogenous insulin); and 3) treating common associated risk factors, such as arterial hypertension and dyslipidaemias, to improve cardiovascular prognosis. When morbid obesity is present, both restoring a good glycemic control and correcting associated risk factors can only be obtained through marked and sustained weight loss. This primary objective justifies more aggressive weight reduction programmes, including very low-calorie diets and bariatric surgery, but only within a multidisciplinary approach and in well-selected patients. [less ▲]

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See detailA comparison of respiratory pathways in fully habituated and normal non-organogenic sugarbeet callus
Bisbis, Badia; Wagner, Anneke; Kevers, Claire ULg et al

in Journal of Plant Physiology (2000), 156(3), 312-318

The respiration of cells and isolated mitochondria of a habituated non-organogenic (HNO) cell line (auxin- and cytokinin-independent) and of a normal (N) cell line (auxin- and cytokinin-requiring) from ... [more ▼]

The respiration of cells and isolated mitochondria of a habituated non-organogenic (HNO) cell line (auxin- and cytokinin-independent) and of a normal (N) cell line (auxin- and cytokinin-requiring) from sugarbeet (Beta vulgaris L.) was investigated. Oxygen uptake by both cells and mitochondria of the HNO fine was higher than that of the N line. Respiration in the presence of cyanide (i.e. capacity of the alternative pathway) was also higher in the HNO callus as compared with the N one. The measurements of O-2 uptake from isolated HNO and N mitochondria showed that addition of a mixture of substrates (NADH, succinate, malate and NAD) resulted in a higher respiration via the CN-resistant pathway in mitochondria From HNO cells. The activity of cytochrome c oxidase was twice as high as in the N cells as compared with the HNO cells. Immunoblots also showed that a higher alternative oxidase protein was present in HNO cells than in the N cells. A model showing the relationships between the different metabolic pathways previously studied in the HNO cells and the higher respiration via the CN-resistant pathway in the HNO cells is proposed. [less ▲]

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See detailL'infection de la chèvre par l'herpèsvirus caprin de type 1
Engels, M.; Thiry, Etienne ULg

in Point Vétérinaire (2000), 31

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See detailOsmotic behaviour of in vitro produced bovine blastocysts in cryoprotectant solutions as a potential predictive test of survival
Kaidi, Safia; Donnay, I.; Lambert, Philippe ULg et al

in Cryobiology (2000), 41

The osmotic behavior of bovine blastocysts produced in vitro was filmed during exposure to and dilution of cryoprotectant solutions used for vitrification. The relationship between the changes in the ... [more ▼]

The osmotic behavior of bovine blastocysts produced in vitro was filmed during exposure to and dilution of cryoprotectant solutions used for vitrification. The relationship between the changes in the diameter of embryos and their subsequent survival was assessed. Embryos collected on Day 6 and Day 7 postinsemination were exposed to 10% glycerol (GLY) for 5 min, 10% GLY + 20% ethylene glycol (EG) for 5 min, and 25% Gly + 25% EG for 30 s, before dilution in 0.85 M galactose and finally in embryo transfer freezing medium (ETF). Embryos that had a higher probability of survival behaved as perfect osmometers, shrinking, reexpanding, or swelling according to an identical pattern, whereas embryos that deviated from this standard usually did not survive. The initial embryo diameter, duration of shrinkage and expansion in 10% glycerol, duration of reexpansion in ETF, and final embryo diameter were clearly predictive of the ability to hatch after culture in vitro. On a given day postinsemination, larger blastocysts were more likely than smaller blastocysts to survive and hatch after exposure to cryoprotectants with or without vitrification. [less ▲]

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See detailQuando il tempo è sospeso: individuo e famiglia nell’anoressia mentale
D'Amore, Salvatore ULg

in Ecologia della Mente (2000), 1

Discusses anorexia nervosa as a complex syndrome in which sociocultural, familial, and individual components are interconnected. Based on their own work with anorexic patients and their families, the ... [more ▼]

Discusses anorexia nervosa as a complex syndrome in which sociocultural, familial, and individual components are interconnected. Based on their own work with anorexic patients and their families, the present authors examine the familial aspects of anorexia at an interactional level and a mythical level. The importance of a 3-generational perspective on anorexia is emphasized. The case study of a 17-yr-old female student with bulimic anorexia is discussed with regard to family dynamics and myths and the sculpting of the present and the future. [less ▲]

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See detailGeochemistry of granitoids from the south Carpathians: A review
Berza, Tudor; Andar, Petre; Tatu, Mihai et al

in Anuarul Institutului Geologic al României (2000), 71

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See detail"Ant'Phipoda", the reference centre for Antarctic crustaceans: A tool for developing and managing Antarctic marine biodiversity information
De Broyer, Claude; Duchesne, Paul-André; Vander Linden, Charles et al

in Polish Archives for Hydrobiology (2000), 47

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See detailRelative impact of a seagrass bed and its adjacent epilithic algal community in consumer diets
Lepoint, Gilles ULg; Nyssen, Fabienne ULg; Gobert, Sylvie ULg et al

in Marine Biology (2000), 136

The aim of this work was to identify and compare, using nitrogen and carbon stable isotope data, the food sources supporting consumer communities in a Mediterranean seagrass bed (Gulf of Calvi, Corsica ... [more ▼]

The aim of this work was to identify and compare, using nitrogen and carbon stable isotope data, the food sources supporting consumer communities in a Mediterranean seagrass bed (Gulf of Calvi, Corsica) with those in an adjacent epilithic algal dominated community. Isotopic data for consumers are not significantly different in the two communities. Particulate matter and algal material (seagrass epiflora and dominant epilithic macroalgae) appear to be the main food sources in both communities. Generally, the 13C of animals suggests that the seagrass Posidonia oceanica (L.) Delile represents only a minor component of their diet or of the diet of their prey, but the occurrence of a mixed diet is not excluded. P.oceanica dominates the diet of only of few species, among which holothurians appear as key components in the cycling of seagrass material. [less ▲]

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See detailPhotoelectron Spectroscopy of Vinyl Bromide and Intramolecular Dynamics of the ionic B state.
Hoxha, A.; Locht, Robert ULg; Leyh, Bernard ULg et al

in Chemical Physics (2000), 256

In this paper we report the He(I) photoelectron spectrum (PES) and the threshold photoelectron spectrum (TPES) of C2H3Br. The fine structure in the first two ionic states in the He(I) spectrum is assigned ... [more ▼]

In this paper we report the He(I) photoelectron spectrum (PES) and the threshold photoelectron spectrum (TPES) of C2H3Br. The fine structure in the first two ionic states in the He(I) spectrum is assigned to progressions belonging partially to previously unobserved vibrational modes. The TPES has been measured between 9.0 and 25.0 eV, and the photon energy range of 9.8-12.0 eV has been investigated in more detail. Extensive calculations with the GAUSSIAN set of programs have been performed to help in the assignment of the observed features. Furthermore, a conical intersection between the A2A" and the B2A" states was found to take place along the C-Br stretching coordinate. Intramolecular dynamics of the B2A" state, initially prepared in the Franck-Condon region, was probed by the Fourier transform of the spectrum. The B2A" state is almost readily depleted, most probably due to a very effective internal cnversion through the conical intersection. [less ▲]

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See detailAbout the Vacuum UV Photoabsorption Spectrum of Methyl Fluoride (CH3F): the fine structure and its vibrational analysis.
Locht, Robert ULg; Leyh, Bernard ULg; Hoxha, A. et al

in Chemical Physics (2000), 257

The vacuum UV photoabsorption spectrum of CH3F has been recorded between 7 and 24 eV and has been analyzed in detail. Broad and structureless peaks are observed over the entire photon energy range. They ... [more ▼]

The vacuum UV photoabsorption spectrum of CH3F has been recorded between 7 and 24 eV and has been analyzed in detail. Broad and structureless peaks are observed over the entire photon energy range. They are all assigned to transitions to Rydberg states, members of series converging to the 2e-1, 5a-1 and 1e-1 ionization limits. These features are underlying very long series of narrow and weak structures in the range of 10-13.2 eV. Through a continuum subtraction procedure, about 70 lines could clearly be identified. These have been assigned to long vibrational progressions belonging to Rydberg states corresponding to the 2e->3p and 2e->6s/5d configurations. These states are split by a Jahn-Teller distortion. Ab initio calculations lead to a Jahn-Teller stabilization energy of about 0.84 eV. The main features observed in the two bands are assigned to one single long vibrational progression of hcomega=0.160 eV (1290cm-1) related to the C-F Jahn-Teller inactive stretching vibration. The remaining structure is assigned to the low excitation of the Jahn-Teller active vibrational modes, i.e. the bending modes nu5 and nu6 characterized by hcomega5=0.120 eV (970 cm-1) and hcomega6=0.082 eV (660 cm-1). Leaning on the present results and assignments previously reported photoelectron spectroscopic data on CH3F+ [L. Karlsson, R. Jadrny, L. Mattsson, F.T. Chau, K. Siegbahn Phys.Scripta 16 (1977) 225] have been reconsidered and reinterpreted. [less ▲]

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See detailFate of the nucleolar vacuole during resumption of cell cycle in pea cotyledonary buds
Jennane, A.; Thiry, Marc ULg; Diouri, M. et al

in Protoplasma (2000), 210(3-4), 172-178

Meristematic cells of pea cotyledonary buds blocked in G(0-1) state contain a small nucleolus with a large central clear area surrounded by a fibrillar rim. The nucleolar structure varies according to the ... [more ▼]

Meristematic cells of pea cotyledonary buds blocked in G(0-1) state contain a small nucleolus with a large central clear area surrounded by a fibrillar rim. The nucleolar structure varies according to the cell cycle from the G(0-1)-blocked state until the first mitoses occurring between 24 and 27 h after removal of the main stem. In order to better identify and understand the role of the central area in the nucleolar function, its content was investigated by cytochemical and terminal deoxynucleotidyl transferase-immunogold methods. The central area showed the characteristics of a vacuole commonly constituted of the condensed chromatin, ribonucleoprotein granules, and lack of argyrophilic proteins. 3 h alter decapitation, a thickening of the fibrillar rim occurred, accompanied by an increase of granules in the vacuole. After 6 h, the unique vacuole broke up into two to four small vacuoles in which the granules are more abundant. After 12 h the nucleolus acquired compact structure with few minute vacuoles dispersed over the fibrillar component. During the whole cell cycle, the condensed chromatin is always observed in the vacuole. Our findings suggest that the appearance of the vacuoles is subsequent to the output of preribosomes from nucleolus. These vacuoles might play a role in condensation and decondensation of the chromatin. [less ▲]

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See detailSystèmes d’information géographique répartis ou distribués
Donnay, Jean-Paul ULg

in AM/FM-GIS BELUX News (2000), 17

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See detailLes non-recommandations dans le traitement de l'arthrose et de la polyarthrite rhumatoïde, ou pourquoi la médecine basée sur le niveau de preuve ne s'applique pas (encore) à la rhumatologie
Malaise, Michel ULg

in Revue Médicale de Liège (2000), 55(5), 466-475

The speed with which the phrase "Evidence-Based Medicine" has entered our language has been astonishing. Virtually all medical areas are concerned, but it probably applies best when clearcut diagnosis can ... [more ▼]

The speed with which the phrase "Evidence-Based Medicine" has entered our language has been astonishing. Virtually all medical areas are concerned, but it probably applies best when clearcut diagnosis can be made or when mortality or well-defined morbidity are the outcomes, two conditions not really frequently encountered in rheumatology. We will discuss why rheumatology is probably not ready yet for the concept and will systematically review why "Evidence-Based Medicine" could in fact be "evidence-biased medicine". We will emphasize why evidence-based medicine can not replace the personal experience and knowledge of patients, two major corner-stones in the clinician's daily work, but should simply be an access to scientific data for the benefit of both patient and physician. [less ▲]

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See detailFootprint Analysis For Measurements Over A Heterogeneous Forest
Rannik, U.; Aubinet, Marc ULg; Kurbanmuradov, O. et al

in Boundary-Layer Meteorology (2000), 97(1),

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See detailNovel functionalization routes of poly(ε-caprolactone)
Lecomte, Philippe ULg; Detrembleur, Christophe ULg; Lou, Xudong et al

in Macromolecular Symposia (2000), 157

The aluminum alkoxide mediated ring opening polymerization of functional lactones, such as γ-ethylene ketal-ε-caprolactone (TOSUO), γ-(triethylsilyloxy)-ε-caprolactone (SCL) and γ-bromo-ε-caprolactone ... [more ▼]

The aluminum alkoxide mediated ring opening polymerization of functional lactones, such as γ-ethylene ketal-ε-caprolactone (TOSUO), γ-(triethylsilyloxy)-ε-caprolactone (SCL) and γ-bromo-ε-caprolactone (γBrCL), is a versatile route to polyesters containing ketal, ketone, alcohol and bromide groups. As result of living polyaddition mechanism, random and block copolymerization of εCL and γBrCL has been successfully carried out. The reactivity ratios are quite similar (1.08 for ε-CL, and 1.12 for γBrCL). These random copolymers are semicrystalline when they contain less than 30 mol% of γBrCL, otherwise they are amorphous. No transesterification reaction occurs during the sequential polymerization of ε-CL and γBrCL leading to block copolymers. Reaction of poly(εCL-co-γBrCL) with pyridine provides quantitatively a polycationic polyester. Furthermore, the reaction of this random copolymer with l,8-diazabicyclo[5.4.0] undec-7-ene (DBU) is a route to unsaturated polyesters, whose the non conjugated double bonds can be quantitatively converted into epoxides by reaction with m-chloroperbenzoic acid (mCPBA). No chain degradation is detected during these derivatization reactions of poly (εCL-co-γBrCL). [less ▲]

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See detailTracabilite dans la filiere animale.
Portetelle, Daniel ULg; Haezebroeck, V.; Mortiaux, F. et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2000), 4(4),

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See detailLa spatio-cartographie
Donnay, Jean-Paul ULg

in Bulletin de la Société Géographique de Liège (2000), 38(1),

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See detailEvidence of nutriceutical effectiveness in the treatment of osteoarthritis
Reginster, Jean-Yves ULg; Gillot, Vincent; Bruyère, Olivier ULg et al

in Current Rheumatology Reports (2000), 2(6), 472-477

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See detailSpectroscopic properties of protochlorophyllide analyzed in situ in the course of etiolation and in illuminated leaves
Schoefs, B.; Bertrand, M.; Franck, Fabrice ULg

in Photochemistry & Photobiology (2000), 72(1), 85-93

The spectroscopic properties of photoactive (ie. flash-transformable) and nonphotoactive protochlorophyll(ide)s (Pchl(ide)) were reinvestigated during the development of bean leaves in darkness. Two ... [more ▼]

The spectroscopic properties of photoactive (ie. flash-transformable) and nonphotoactive protochlorophyll(ide)s (Pchl(ide)) were reinvestigated during the development of bean leaves in darkness. Two phases in the process of Pchl(ide) accumulation were apparent from quantitative measurements of pigment content: a lag phase (first week) during which photoactive Pchl(ide) accumulated faster than nonphotoactive Pchl(ide); and a fast phase (second week), showing parallel accumulation of both types of Pchl(ide). 'Flashed-minus-dark' absorbance difference spectra recorded in situ at 77 K showed that P650-655 was the predominant form of photoactive protochlorophyllide regardless of developmental stage. Quantitative analysis of energy migration processes between the Pchl(ide) forms showed the existence of energy transfer units containing a 1:8 ratio of nonphotoactive and photoactive Pchl(ide)s during development. Gaussian deconvolution of in situ 77 K fluorescence spectra indicated that the 633 nm band of nonphotoactive Pchl(ide) was made of four bands, at 625, 631, 637 and 643 nm, whose relative amplitudes only slightly changed during development. The emission band of photoactive Pchlide was also analyzed using the same method. Three components were found at 644, 652 and 657 nm, The emission band of P650-655 included the last two components, which become predominant only in fully etiolated plants. Photoactive Pchlide with an emission maximum at 653 nm was detected in the light during development of leaves of photoperiodically grown plants. [less ▲]

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See detailLes acteurs d'un système de justice pénale européen
Flore, Daniel ULg

in L’espace judiciaire pénal européen après Tampere (2000)

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See detailBinding and release of metallic cations by a polyaniline-based resin
Jérôme, Christine ULg; Martinot, Lucien; Jérôme, Robert ULg

in Radiochimica Acta (2000), 88(1), 39-46

The electrochemical control of the binding of metallic ions (actinides and a lanthanide) by redox active polyaniline resin, i.e., polyaniline doped by polystyrene sulfonate (Pani/PSSO3), has been studied ... [more ▼]

The electrochemical control of the binding of metallic ions (actinides and a lanthanide) by redox active polyaniline resin, i.e., polyaniline doped by polystyrene sulfonate (Pani/PSSO3), has been studied. Electrochemical and nuclear techniques (cyclic voltammetry, α -counting, Rutherford backscattering) have been used in order to characterize the exchange of thorium, lanthanum and uranium cations, particularly in terms of reversibility and efficiency. This electrochemical process has been compared with the chemical one promoted merely by pH variation, and the efficiency of the two methods has been discussed for each type of cation. [less ▲]

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See detailCancer in Transplant Recipients
Detry, Olivier ULg; Honore, Pierre ULg; Meurisse, Michel ULg et al

in Transplantation Proceedings (2000), 32(1), 127

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See detailLes débuts de l'humanité dans le Prométhée enchaîné d'Eschyle
Renaud, Jean-Michel ULg; Wathelet, Paul ULg

in Uranie : Mythes et Littératures (2000), 9

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See detailMethodological bias in home range and mobility estimates when locating radio-tagged trout, Salmo trutta, at different time intervals
Ovidio, Michaël ULg; Philippart, Jean-Claude ULg; Baras, Etienne

in Aquatic Living Resources (2000), 13(6), 449-454

Radio tracking has been extensively used to enhance our knowledge on the movement and home range of fish in general and salmonids in particular. However, the use of various temporal sampling protocols is ... [more ▼]

Radio tracking has been extensively used to enhance our knowledge on the movement and home range of fish in general and salmonids in particular. However, the use of various temporal sampling protocols is likely to overlook fish movements, and produce experimental artefacts, the amplitude of which is unknown and may compromise comparison of fish behaviours revealed by different protocols. Starting from a day-by-day tracking study of brown treat in Belgian waters (Aisne stream, nine fish, minimum 39 daily locations per fish), we re-examined their home range and mobility, through a subsampling process, as if the fish had been located at longer time intervals (2-14 days). The estimates from subsamples were compared to the original data set in order to quantify the corresponding reduction of accuracy from observed data, and how far this could be predicted on the basis of locating frequency. The results clearly indicate that all intervals longer than one day generally generate substantial biases (reduction of accuracy from 0 to 82% for home range and from 5 to 92% for mobility) but these can be partly corrected through the use of predictive models. This analysis demonstrates that any comparison between studies relying on different locating frequencies can generate some ambiguity when interpreting biological phenomena or geographical differences. (C) 2000 Ifremer/CNRS/INRA/IRD/Cemagref/Editions scientifrques et medicales Elsevier SAS. [less ▲]

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See detailEffects of Mild Hypothermic Cardiopulmonary Bypass on Eeg Bispectral Index
Dewandre, Pierre-Yves; Hans, Pol ULg; Bonhomme, Vincent ULg et al

in Acta Anaesthesiologica Belgica (2000), 51(3), 187-90

We studied the effect of mild hypothermic cardiopulmonary bypass (30 degrees C) on the EEG Bispectral Index in 10 patients undergoing elective CABG. BIS was recorded at 11 event-related time points during ... [more ▼]

We studied the effect of mild hypothermic cardiopulmonary bypass (30 degrees C) on the EEG Bispectral Index in 10 patients undergoing elective CABG. BIS was recorded at 11 event-related time points during the procedure. After a significant decrease at the induction of anaesthesia, BIS was not further modified during the procedure. BIS was neither affected by surgical stimulation nor by CPB and mild hypothermia. We conclude that we did not find any reason to preclude the use of BIS to assess the hypnotic effects of anaesthetics during normothermic or mild hypothermic CPB. [less ▲]

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See detailPharma-clinics. Le medicament du mois. Le rofecoxib (Vioxx).
Scheen, André ULg

in Revue Médicale de Liège (2000), 55(7), 751-3

Rofecoxib (Vioxx, Merck Sharp & Dohme) is a potent and selective inhibitor of the COX-2 isoform of cyclooxygenase which is used as a nonsteroidal anti-inflammatory drug (NSAID). It is indicated in the ... [more ▼]

Rofecoxib (Vioxx, Merck Sharp & Dohme) is a potent and selective inhibitor of the COX-2 isoform of cyclooxygenase which is used as a nonsteroidal anti-inflammatory drug (NSAID). It is indicated in the symptomatic relief of pain due to osteoarthritis. The initial oral dosage of rofecoxib is 12.5 mg once daily in adults, and this dose may be increased up to a maximal dosage of 25 mg once daily if necessary. Its clinical efficacy seems to be similar to that of other NSAIDs at maximal recommended dosages, but its safety profile, especially gastrointestinal tolerance, is much better because of the COX-2 selectivity. Ongoing clinical trials are performed in patients with rheumatoid arthritis. [less ▲]

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See detailDescriptio Urbis Romae
Moreno, Paola ULg

in Revue Belge de Philologie et d'Histoire (2000)

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See detailWhat do the needles, syringes, lancets and reagent strips of diabetic patients become in the absence of a common attitude? About 1070 questionnaires in diabetic clinics.
Bouhanick, B.; Hadjadj, S.; Weekers, Laurent ULg

in Diabètes & Métabolism (2000), 26(4), 288-93

The aim was to investigate the fate of injection and monitoring material after its use by diabetic patients in different countries (France, Belgium, Luxemburg, Switzeland and Tunisia). Some suitable ... [more ▼]

The aim was to investigate the fate of injection and monitoring material after its use by diabetic patients in different countries (France, Belgium, Luxemburg, Switzeland and Tunisia). Some suitable containers are available for disposal but little is known about the attitudes of patients and physicians to them. 1 070 questionnaires were completed by patients (age: 50 +/- 18 years; diabetes duration: 15 +/- 11 years; 2.8 +/- 1.1 injections per day) visiting 109 doctors. Injections were done at home (72.6%), or both at home and at work (26.6%). At home: needles, syringes, lancets and reagent strips were thrown directly into the bin in 46.9%, 49.9%, 52.2% and 67.6% of cases, respectively; and in a closed plastic bottle in 29. 6%, 28.5%, 28.9% and 19.9% of cases, respectively. Specific containers were used in 8.6% and 6.3% of cases for needles and syringes, respectively. 62% of the bottles and containers were thrown directly into the bin, whereas 15.5% were returned to a pharmacy (4.5% taken to hospitals, 2.9% were burned). At work: 63% of the patients brought their needles and syringes home for disposal, 6.9% kept suitable containers at work and 30% threw their materials directly into local bins. We conclude that awareness should be increased and the organization of the collection of used material improved. [less ▲]

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See detailAmphipods of a stony beach in the maritime Antarctic
Jazdzewski, Krzystov; De Broyer, Claude; Pudlarz, M. et al

in Polish Archives for Hydrobiology (2000), 47

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See detailA numerically efficient data analysis method with error map generation
Rixen, M.; Beckers, Jean-Marie ULg; Brankart, J. M. et al

in Ocean Modelling (2000), 2

The variational inverse model (VIM) for data analysis was already shown to be statistically equivalent to objective analysis (OA) provided the covariance function for the OA and the VIM reproducing kernel ... [more ▼]

The variational inverse model (VIM) for data analysis was already shown to be statistically equivalent to objective analysis (OA) provided the covariance function for the OA and the VIM reproducing kernel are identical. The VIM, however does not allow a direct derivation of the error field associated with the analysis. The purpose of the paper is to extend the one to one correspondance between the two analysis shemes by proposing a heuristic statistical error expression for the VIM. The numerical efficiency on analysis and error map generation of both methods is compared on quasi-synoptic and climatological data sets. It is shown that the VIM analysis and error map generation offers interesting numerical skills in both case studies. [less ▲]

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See detailLes évaluations externes en Communauté française de Belgique : quel sens donner à la mesure ?
Lafontaine, Dominique ULg

in Cahiers du Service de Pédagogie Expérimentale (SPE) (2000), (1-2), 110-114

Quelles sont les origines et les modalités du dispositif d'évaluation externe mis en place en Communauté française de Belgique à partir de 1994-1995 ? Quelle(s) fonction(s) est-il supposé remplir ? L ... [more ▼]

Quelles sont les origines et les modalités du dispositif d'évaluation externe mis en place en Communauté française de Belgique à partir de 1994-1995 ? Quelle(s) fonction(s) est-il supposé remplir ? L'analyse met en évidence le paradoxe d'un dispositif institutionnel rejeté à la marge du cadre législatif et dont la définition des finalités est laissée à l'appréciation des acteurs appelés à le mettre en oeuvre. [less ▲]

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See detailL'herpèsvirus bovin de type 4 : virus pathogène ou passager?
Thiry, Etienne ULg; Markine-Goriaynoff, Nicolas; Minner, Frédéric et al

in Point Vétérinaire (2000), 31

Bovine herpesvirus type 4 (BHV-4) is a ubiquitous herpesvirus in cattle. It has been isolated from animals showing a wide variety of clinical signs but few of the isolates have proven experimental ... [more ▼]

Bovine herpesvirus type 4 (BHV-4) is a ubiquitous herpesvirus in cattle. It has been isolated from animals showing a wide variety of clinical signs but few of the isolates have proven experimental pathogenicity. Species that are susceptible to BHV-4 include animals other than ruminants, notably cats and, surprisingly, a primate the owl monkey (Aotus trivirgatus). BHV-4 exists as a latent infection in mononuclear cells. In cattle, BHV-4 has been isolated in animals exhibiting ocular and respiratory conditions and it has been found in females with genital tract conditions such as post-partum metritis and vulvovaginitis. There is some epidemiological and experimental evidence that BHV-4 may be a cause of bovine abortion. There is no vaccine available in Europe and prevention is exclusively by hygiene measures. [less ▲]

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See detailComments on the criticisms of Coquel and Abdesselam-Rouighi (1999) to the paper of Loboziak et al. (1998)
Loboziak, S; Melo; Streel, Maurice ULg

in Annales de la Société Géologique du Nord (2000), 8

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See detailJeux vidéos : enjeux et leurres
Leclercq, Dieudonné ULg; Denis, Brigitte ULg

in Education-Formation (2000)

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See detailA Topological Reconstruction Theorem for $D^{\infty}$-Modules
Prosmans, Fabienne ULg; Schneiders, Jean-Pierre ULg

in Duke Mathematical Journal (2000), 102(1), 39-86

We prove that any perfect complex of $D^{\infty}-modules may be reconstructed from its holomorphic solution complex provided that we keep track of the natural topology of this last complex. This is to be ... [more ▼]

We prove that any perfect complex of $D^{\infty}-modules may be reconstructed from its holomorphic solution complex provided that we keep track of the natural topology of this last complex. This is to be compared with the reconstruction theorem for regular holonomic D-modules which follows from the well-known Riemann-Hilbert correspondence. [less ▲]

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See detailUn modèle de gestion informatisé pour les plantations d'épicéa commun en Ardenne belge
Lejeune, Philippe ULg; Thibaut, André; Pauwels, Dominique

in Les cahiers forestiers de Gembloux (2000), (24), 26

Norway spruce (Picea abies (L.) Karst.) is the first forest species devoted to production in the Wallonian region. Many private and public foresters have to face management problems for these stands ... [more ▼]

Norway spruce (Picea abies (L.) Karst.) is the first forest species devoted to production in the Wallonian region. Many private and public foresters have to face management problems for these stands : rotation length, definition of thinning type, harvesting scheduling, future income and profitability estimation, ... The management model presented in this article can give some answers to these questions. It is made of two components : on one hand, a growth model predicts stand growth in connection with site index and silvicultural parameters, and, on the other hand several modules compute silvicultural indicators (stability index, mortality rate, assortments, ...) and financial indicators (prediction of future incomes and profitability). The management model allows to test and compare in a flexible way different scenarios applicable to stands described by their initial stage (number of stems and basal area per hectare, dominant height). These tools are integrated in a spreadsheet application using Excel TM, which makes it very easy to use by the forest manager who wants to base his managment on objective criteria. [less ▲]

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See detailL'etude clinique du mois. Insulino-independance prolongee apres transplantation d'ilots de langerhans chez le patient diabetique de type 1: l'aboutissement d'un reve?
Scheen, André ULg

in Revue Médicale de Liège (2000), 55(8), 803-5

A Canadian research team recently reported a series of 7 consecutive patients with type 1 brittle diabetes who could achieve sustained excellent metabolic control in the absence of insulin therapy after ... [more ▼]

A Canadian research team recently reported a series of 7 consecutive patients with type 1 brittle diabetes who could achieve sustained excellent metabolic control in the absence of insulin therapy after successful islet transplantation. This exceptional success, which contrasts with previous less favourable results, is probably due to the transplantation of a higher number of islets of good quality and to the use of a new glucocorticoid-free immunosuppressive regimen. These remarkable results which provide proof of the principle that islet transplantation can be reproducibly successful, at least for one year, may raise new hope in patients with type 1 diabetes. However, the problem of supply and demand of islets is huge and will require a careful, and probably difficult, selection of the best candidates to benefit from this new therapeutic approach. [less ▲]

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See detailSucceeded plant regeneration from very immature embryos of Phaseolus vulgaris
Geerts, P.; Mergeai, Guy ULg; Baudoin, Jean-Pierre ULg

in Annual Report of the Bean Improvment Cooperative (2000), (43), 206-207

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See detailHydrodynamical and ecosystem processes in ice-covered seas of the Southern and Northern Hemispheres
Goffart, Anne ULg; Hecq, Jean-Henri ULg

in Journal of Marine Systems (2000), 27

Preface of the 30th International Liège Colloquium on Ocean Hydrodynamics Liège, Belgium (May 4–8 1998) : Hydrodynamical and ecosystem processes in ice-covered seas of the Southern and Northern ... [more ▼]

Preface of the 30th International Liège Colloquium on Ocean Hydrodynamics Liège, Belgium (May 4–8 1998) : Hydrodynamical and ecosystem processes in ice-covered seas of the Southern and Northern Hemispheres. Issue of JMS edited by Anne Goffart and Jean-Henri Hecq. [less ▲]

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See detailProton re-uptake partitioning between uncoupling protein and ATP synthase during benzohydroxamic acid-resistant state 3 respiration in tomato fruit mitochondria.
Jarmuszkiewicz, W.; Almeida, A.; Vercesi, A. et al

in Journal of Biological Chemistry (2000), 275(18), 13315-13320

The yield of oxidative phosphorylation in isolated tomato fruit mitochondria depleted of free fatty acids remains constant when respiratory rates are decreased by a factor of 3 by the addition of n-butyl ... [more ▼]

The yield of oxidative phosphorylation in isolated tomato fruit mitochondria depleted of free fatty acids remains constant when respiratory rates are decreased by a factor of 3 by the addition of n-butyl malonate. This constancy makes the determination of the contribution of the linoleic acid-induced energy-dissipating pathway by the ADP/O method possible. No decrease in membrane potential is observed in state 3 respiration with increasing concentration of n-butyl malonate, indicating that the rate of ATP synthesis is steeply dependent on membrane potential. Linoleic acid decreases the yield of oxidative phosphorylation in a concentration-dependent manner by a pure protonophoric process like that in the presence of FCCP. ADP/O measurements allow calculation of the part of respiration leading to ATP synthesis and the part of respiration sustained by the dissipative H(+) re-uptake induced by linoleic acid. Respiration sustained by this energy-dissipating process remains constant at a given LA concentration until more than 50% inhibition of state 3 respiration by n-butyl malonate is achieved. The energy dissipative contribution to oxygen consumption is proposed to be equal to the protonophoric activity of plant uncoupling protein divided by the intrinsic H(+)/O of the cytochrome pathway. It increases with linoleic acid concentration, taking place at the expense of ADP phosphorylation without an increase in the respiration. [less ▲]

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See detailDonor lymphocyte infusion to eradicate recurrent host hematopoiesis after allogeneic BMT for sickle cell disease.
Baron, Frédéric ULg; Dresse, Marie-Françoise ULg; Beguin, Yves ULg

in Transfusion (2000), 40(9), 1071-3

BACKGROUND: Donor lymphocyte infusion (DLI) is currently standard therapy for relapse of malignancies after allogeneic BMT. Several observations suggest that both normal and leukemic progenitor cells of ... [more ▼]

BACKGROUND: Donor lymphocyte infusion (DLI) is currently standard therapy for relapse of malignancies after allogeneic BMT. Several observations suggest that both normal and leukemic progenitor cells of host origin constitute effective target cells for donor-derived lymphocytes. To prevent relapse of sickle cell disease (SCD), a child with evidence of decreasing mixed chimerism received DLIs 8 months after allogeneic BMT for SCD. CASE REPORT: A 4-year-old child who was homozygous for SCD underwent a transplantation of bone marrow from his fully HLA-matched sister. Routine detection of sex chromosomes in bone marrow cells evidenced decreasing mixed chimerism, which heralded a probably imminent recurrence of the disease. The patient received two DLIs in graded incremental doses on Days 234 and 267. One month later, he developed grade 2 acute GVHD that responded well to corticosteroids and cyclosporine. RESULTS: DLI resulted in complete donor chimerism within 2 months of the second infusion. Now, 2 years after the second DLI, the patient is in excellent condition, with normal Hb and excellent growth and development. CONCLUSION: This is the first report of successful use of DLI in a patient with probable imminent SCD recurrence after allogeneic BMT. It shows that DLI can displace residual host HPCs in case of recurrence of nonmalignant disease after allogeneic BMT. [less ▲]

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See detailThe relationships between episodic memory, working memory, and executive functions: The contribution of the prefrontal cortex
Van der Linden, Martial ULg; Meulemans, Thierry ULg; Marczewski, Philippe et al

in Psychologica Belgica (2000), 40(4), 275-297

Discusses the neurophysiological functions of the prefrontal cortex related to memory processes. Functional brain imaging studies have revealed that distinct regions of the prefrontal cortex are engaged ... [more ▼]

Discusses the neurophysiological functions of the prefrontal cortex related to memory processes. Functional brain imaging studies have revealed that distinct regions of the prefrontal cortex are engaged in episodic memory operations, with some regions apparently part of multiple networks subserving different memory abilities. The prefrontal cortex is also involved in shifting processes. Working memory processes within the dorsolateral and ventrolateral frontal cortex are organized according to the type of processing required rather than the nature of the information being processed. The binding of contextual information, both incidentally and intentionally, is the most crucial process involved in episodic memory. Inhibition control involves not only bilateral prefrontal areas, but also posterior regions and subcortical structures, but the specific role of the cerebral areas is not clear at present. [less ▲]

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See detailChronique semestrielle de droit communautaire
Partsch, Philippe-Emmanuel ULg

in Journal des Tribunaux (2000)

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See detailInteractions between gellan gum and other polysaccharides.
Blecker, Christophe ULg; Razafindralambo, Hary ULg; Paquot, Michel ULg

in Czech Journal of Food Sciences (2000), 18

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See detailPharma-clinics. Le medicament du mois. La levofloxacine (Tavanic).
Scheen, André ULg

in Revue Médicale de Liège (2000), 55(11), 1015-7

Levofloxacin, the (-)-(S)-enantiomer isolated from the racemate ofloxacin, is launched by Aventis under the trade name of Tavanic. This new oral and parenteral antibiotic belongs to the fluoroquinolone ... [more ▼]

Levofloxacin, the (-)-(S)-enantiomer isolated from the racemate ofloxacin, is launched by Aventis under the trade name of Tavanic. This new oral and parenteral antibiotic belongs to the fluoroquinolone family and exerts a bactericidal activity upon a large spectrum of microorganisms, including Gram negative and Gram positive bacilli (among which Streptococcus pneunomiae), and atypical respiratory pathogens. It also has interesting pharmacokinetic properties. Besides the classical indications of other fluoroquinolones (especially complicated urinary tract infections, including pyelonephritis, and severe skin and soft tissue infections), levofloxacin is indicated for the treatment of acute sinusitis, acute exacerbations of chronic bronchitis and community-acquired pneumonia. [less ▲]

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See detailÀ propos des Tables des chansonniers romans : le projet “Intavulare"
Henrard, Nadine ULg

in Moyen Age (Le) (2000), CVI(1), 165-174

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See detailTreating families of individuals with traumatic brain injury : Presentation of clinical cases approached from a structural therapy perspective
Laroi, Frank ULg

in Journal of Family Psychotherapy (2000), 11

A traumatic brain injury may have a great impact on the family as a whole and may include changes in the family's organizational structure, communication patterns, or balance of family needs. In spite of ... [more ▼]

A traumatic brain injury may have a great impact on the family as a whole and may include changes in the family's organizational structure, communication patterns, or balance of family needs. In spite of this, treatment strategies for these problems are only slowly being recognized, resulting in either family reactions being inadequately addressed in rehabilitative programs, or treatment being approached from a family support perspective and not from a family therapy perspective. The aim of the following paper is to illustrate how family therapeutical approaches can be used in treating families of individuals with brain injury, in particular, structural interventions. Clinical examples will be presented where structural interventions were utilized with brain injury patients and their families. Other inverventional approaches from family therapy will also be mentioned. [less ▲]

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See detailFar upstream sequences regulate the human prolactin promoter transcription
Van de Weerdt, Cécile ULg; Peers, Bernard ULg; Belayew, A. et al

in Neuroendocrinology (2000), 71(2), 124-37

The human prolactin gene is mainly expressed in pituitary lactotrope cells, but transcription from an alternative, far upstream promoter was detected in lymphoid, placental and mammary cells. We describe ... [more ▼]

The human prolactin gene is mainly expressed in pituitary lactotrope cells, but transcription from an alternative, far upstream promoter was detected in lymphoid, placental and mammary cells. We describe the transcriptional activity in rat pituitary cells of the complete region separating the two promoters, using transient transfection experiments. A far upstream activating region was only functional in combination with the prolactin promoter. DNaseI protection experiments revealed, in addition to binding sites for the pituitary-specific factor Pit-1, sites (e.g. SD1) for several ubiquitous factors and one lymphoid-specific factor (SD4). A single copy of the ubiquitous site SD1 or the lymphoid-specific site SD4 was unable to activate transcription of a heterologous promoter in pituitary cells. However, SD1 activated transcription in nonpituitary cells and SD4 was functional specifically in lymphoid cells. Five copies of a distal site (D8) activated transcription in each cell type tested. Gel retardation experiments show that this site binds the specific factor C/EBP in liver and a distinct factor in other cell types. Our results suggest that different elements within this large region direct specific expression from each promoter via a complex interplay between cell-specific and ubiquitous transcription factors. [less ▲]

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See detailStructure et fonctionnement de la mémoire : une approche neuropsychologique
Marczewski, Philippe; Van der Linden, Martial ULg; Collette, Fabienne ULg et al

in Confrontations Psychiatriques (2000), 41

Memory in not a unified system. It's composed of independant but interacting systems. Cognitive neuropsychology showed dissociations between these systems in patients with various brain lesions. The ... [more ▼]

Memory in not a unified system. It's composed of independant but interacting systems. Cognitive neuropsychology showed dissociations between these systems in patients with various brain lesions. The episodic memory system is devoted to the processing of personally lieved events. The predominant role played by frontal regions in underlying episodic memory has been fully documented. Moreover, the episodic memory disfunctions may lead to illusions of memory such as false memories, confabulations or hallucinations. [less ▲]

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See detailEffect of a 30-minute infusion of dobutamine hydrochloride on hind limb blood flow and hemodynamics in halothane-anesthetized horses
Raisis, Anthea L; Young, Lesley E; Blissitt, Karen J et al

in American Journal of Veterinary Research (2000), 61(10), 1282-1288

OBJECTIVE: To evaluate the hemodynamic effects of dobutamine hydrochloride (0.5 microg/kg of body weight/min) in halothane-anesthetized horses. ANIMALS: 6 adult Thoroughbred horses. PROCEDURE: Anesthesia ... [more ▼]

OBJECTIVE: To evaluate the hemodynamic effects of dobutamine hydrochloride (0.5 microg/kg of body weight/min) in halothane-anesthetized horses. ANIMALS: 6 adult Thoroughbred horses. PROCEDURE: Anesthesia was induced by use of romifidine (100 microg/kg) and ketamine (2.2 mg/kg), IV. Anesthesia was maintained by halothane (end-tidal concentration 0.9 to 1.0%). Aortic, left ventricular, and right atrial pressures were measured, using catheter-mounted strain gauge transducers. Cardiac output (CO), velocity time integral, maximal aortic blood flow velocity and acceleration, and left ventricular preejection period and ejection time were measured from aortic velocity waveforms obtained by transesophageal Doppler echocardiography. Velocity waveforms were recorded from the femoral vessels, using Doppler ultrasonography. The time-averaged mean velocity and early diastolic deceleration slope (EDDS) were measured. Pulsatility index (PI) and volumetric flow were calculated. Microvascular perfusion was measured in the semimembranosus muscles by laser Doppler flowmetry. Data were recorded 60 minutes after induction of anesthesia (control) and at 15 and 30 minutes after start of an infusion of dobutamine (0.5 microg/kg/min). RESULTS: Aortic pressures were significantly increased during the infusion of dobutamine. No change was observed in the indices of left ventricular systolic function including CO. Femoral arterial flow significantly increased, and the PI and EDDS decreased. No change was observed in the femoral venous flow or in microvascular perfusion. CONCLUSIONS AND CLINICAL RELEVANCE: At this dosage, dobutamine did not alter left ventricular systolic function. Femoral blood flow was preferentially increased as the result of local vasodilatation. The lack of effect of dobutamine on microvascular perfusion suggests that increased femoral flow is not necessarily associated with improved perfusion of skeletal muscles [less ▲]

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See detailNeuropsychologie de l'apprentissage implicte et de la mémoire procédurale
Meulemans, Thierry ULg

in Revue de Neuropsychologie (2000), 10(1), 129-157

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See detailAffections musculaires et intolérance à l'effort. 2- Traitement
Art, Tatiana ULg; Amory, Hélène ULg; Lekeux, Pierre ULg

in Pratique Vétérinaire Equine (2000), 32

The muscular condition, rhabdomyolysis, may cause exercise intole¬rance in the sporting horse. When the condition is recurring, it is often difficult for the equine practitioner to establish the clinical ... [more ▼]

The muscular condition, rhabdomyolysis, may cause exercise intole¬rance in the sporting horse. When the condition is recurring, it is often difficult for the equine practitioner to establish the clinical diagnosis (is the horse suffering from rhabdomyolysis or not ?) and the aetiology (what is/are the cause(s) of the condition ?) and also to provide an effective treatment [less ▲]

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See detailRecommandations pour le traitement de l'obesite.
Luyckx, Françoise ULg; Scheen, André ULg

in Revue Médicale de Liège (2000), 55(5), 367-71

Obesity represents a major medical problem which is now considered more seriously from a scientific, clinical and economical point of view. Such an evolution was mandatory when considering the usual ... [more ▼]

Obesity represents a major medical problem which is now considered more seriously from a scientific, clinical and economical point of view. Such an evolution was mandatory when considering the usual contempt for what is now considered as a chronic disease and especially the charlatanism which was observed among medical and non-medical spheres. Hence, as for numerous other pathologies, international guidelines have recently been published to optimize the management of obesity, from the view point of efficacy and, more particularly, safety. We will summarize the main recommendations as far as diet and physical treatment, pharmacotherapy and bariatric surgery are concerned. Finally, we will briefly describe general guidelines on the management of obese subjects taking into account the degree of weight excess and the presence of complications. [less ▲]

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See detailEpidemiologische bewaking van boviene spongiforme encefalopathie in Belgïe: Jaaroverzicht voor 1998
Saegerman, Claude ULg; Dechamps, P.; Vanopdenbosch, E. et al

in Vlaams Diergeneeskundig Tijdschrift (2000), 69

In 1998 werden 6 runderen tussen de 54 en 71 maanden ouderdom, afkomstig van de provincies West-Vlaanderen (3 gevallen), Oost-Vlaanderen (2 gevallen) en Luik (1 geval), gediagnostiseerd als gevallen van ... [more ▼]

In 1998 werden 6 runderen tussen de 54 en 71 maanden ouderdom, afkomstig van de provincies West-Vlaanderen (3 gevallen), Oost-Vlaanderen (2 gevallen) en Luik (1 geval), gediagnostiseerd als gevallen van boviene spongiforme encephalopathie (BSE). De hypotheses betreffende de oorsprong van de infectie op zijn de volgende : het optreden van sporadische gevallen zonder duidelijk definieerbare oorzaak; de mogelijke kruiscontaminatie tussen voeder voor monogastrische dieren met daarin dierlijk meel en voeder voor herkauwers waarin geen dierlijk meel is verwerkt en dit tijdens het fabricatieproces, de stockage, het transport of de distributie; het gebruik van dierlijk beendermeel in het voeder voor runderen geproduceerd voor de ban (van kracht vanaf 27/7/1994). Algemeen kan men dus stellen dat in België de aanwezigheid van gecontamineerd diermeel als risicofactor voor BSE niet kan worden uitgesloten. De oorsprong van deze diermelen kon nog niet gedetermineerd worden. [less ▲]

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See detailSm-Nd isotope systematics in deep-sea sediments: clay-size versus coarser fractions
Innocent, C.; Fagel, Nathalie ULg; Hillaire-Marcel, C.

in Marine Geology (2000), 168(1-4), 79-87

Sm-Nd studies were carried out on Last Glacial and Holocene sediments from the Labrador Sea. Three grain-size fractions were analyzed for each sediment: the clay-size fraction (<2 mu m), the fine cohesive ... [more ▼]

Sm-Nd studies were carried out on Last Glacial and Holocene sediments from the Labrador Sea. Three grain-size fractions were analyzed for each sediment: the clay-size fraction (<2 mu m), the fine cohesive silts (2-10 mu m) and the coarse silts (10-63 mu m) In most cases, Sm-Nd signatures are different from one grain-size to another. In addition, different Sm-Nd signatures are derived from the clay-size fractions compared to the cohesive silt fraction, indicating that the cohesive fraction is heterogeneous and that distinct origins in terms of source-areas are implied. Silt fractions record the influence of supplies from the North American Precambrian Shield, whereas clay-size fractions (<2 mu m) are more sensitive to sedimentary input from the Eastern Basins, in relation with deep currents. Coupling Sm-Nd studies on silt and clay fractions may be a powerful tool to unravel the evolution of deep circulations versus detrital supplies. (C) 2000 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailDiscretization of Sources of Integral Operators
Tarhasaari, T.; Kettunen, L.; Geuzaine, Christophe ULg

in IEEE Transactions on Magnetics (2000), 36(4), 659--662

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See detailPolitique et usage des manuels scolaires en mathématiques et en sciences
Monseur, Christian ULg; Demeuse, Marc ULg

in Cahiers du Service de Pédagogie Expérimentale (SPE) (2000), (3-4), 177-183

Detailed reference viewed: 18 (1 ULg)