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See detailEntre Babil et Babel
Durand, Pascal ULg

in Liège Université (1997), (Automne), 15

Compte rendu de J.-A. Rondal et J.-P. Thibaut, Psychologie de l'enfant et de l'adolescent, Bruxelles, Labor, 1997

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See detailLesions observed on stranded seabirds along the Belgian coast from 1992 to 1995
Jauniaux, Thierry ULg; Brosens, L.; Coignoul, Freddy ULg

in ICES Journal of Marine Science (1997), 54(4), 714-717

From 1992 to 1995, dead seabirds found on Belgian beaches were collected and various tissues of 241 birds were sampled for histopathological, bacteriological, parasitological, and toxicological ... [more ▼]

From 1992 to 1995, dead seabirds found on Belgian beaches were collected and various tissues of 241 birds were sampled for histopathological, bacteriological, parasitological, and toxicological investigations. The most common species examined was the guillemot (Uria aalge). Necropsies revealed cachexia (severe emaciation), acute haemorrhagic gastro-enteropathy and oil contamination in many of these birds. Statistical analyses were performed in order to explore correlations of these with biological parameters such as age, sex, and origin (pelagic or non-pelagic). The pelagic origin of seabirds were associated with the three main findings. Oil contamination was associated with acute gastro-enteropathy and cachexia, and cachexia was more prevalent among juveniles. Finally, cachexia and acute gastro-enteropathy were strongly associated. It is possible that oiled pelagic seabirds become cachectic and die of acute gastro-enteropathy. (C) 1997 International Council for the Exploration of the Sea. [less ▲]

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See detailPost-operative adjuvant therapy for non-small-cell lung cancer
Barthelemy, Nicole ULg; Johnson; Arriagada et al

in Lung Cancer (1997), 17(supp 1),

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See detailThe Effect of Intravenous Administration of Web 2086 on Paf-Induced Platelet Aggregation in Healthy Friesian Calves
Bastos da Silva, Miriam; Gustin, Pascal ULg; Herion, Francine ULg et al

in Veterinary Research Communications (1997), 21(7), 521-531

The in vivo ability of the specific PAF-antagonist WEB 2086, a thienotriazolodiazepine, to inhibit platelet-activating factor (PAF) in cattle was investigated by in vitro determination of platelet ... [more ▼]

The in vivo ability of the specific PAF-antagonist WEB 2086, a thienotriazolodiazepine, to inhibit platelet-activating factor (PAF) in cattle was investigated by in vitro determination of platelet aggregation curves. WEB 2086 was infused intravenously into a group of 5 healthy male Friesian calves in a dose of 3 mg/kg over 1 min. The resultant inhibition peaked between 30 min and 1 h after administration of WEB 2086. The inhibition was significantly reduced after 3 h and became non-significant after 6 h, but maximal pre-treatment aggregation had not been restored by 24 h after the injection of WEB 2086. These results confirm previous results obtained in vitro and suggest that WEB 2086 is a potent antagonist of PAF activity in calves. They also suggest that further clinical studies with WEB 2086 in cattle are desirable. [less ▲]

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See detailThe Photoabsorption Spectrum of Vinylchloride (C2H3Cl) in the 8-12 eV Range.
Locht, Robert ULg; Leyh, Bernard ULg; Hottmann, K. et al

in Chemical Physics (1997), 220

The photoabsorption spectrum of vinylchloride (C2H3Cl) has been measured using synchrotron radiation and has been analyzed in detail between 8-12 eV photon energy. Valence and virtual valence and Rydberg ... [more ▼]

The photoabsorption spectrum of vinylchloride (C2H3Cl) has been measured using synchrotron radiation and has been analyzed in detail between 8-12 eV photon energy. Valence and virtual valence and Rydberg transitions have been identified and classified. Tentative assignments were based on the ionization energies as measured by He(I)- and threshold photoelectron spectroscopy, as reported in the joined paper. Many features have been identified as being members of vibrational progressions belonging to the observed Rydberg series. [less ▲]

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See detailNotes of the flea fauna (Insecta, Siphonaptera) of the terrestrial azorean mammals
Libois, Roland ULg; Fons, Roger; Mathias, Maria da Luz et al

in Arquivos do Museu Bocage. Nova série (1997), 3(1), 1-11

During three successive years, field samplings of wild mammals were organised on different Azorean islands and the ectoparastes were collected. Among 340 murid rodents, 31 did bear at least one flea ... [more ▼]

During three successive years, field samplings of wild mammals were organised on different Azorean islands and the ectoparastes were collected. Among 340 murid rodents, 31 did bear at least one flea. Nosopsyllus l. londiniensis has been found on the mouse in São Miguel. Stenoponia t. tripectinata has been discovered in Terceira and in São Miguel, mainly on house mice and on one black rat out of 121. Nosopsyllus fasciatus was present on the mouse and on both the black and the Norway rats. Its presence has been evidenced in four islands: São Miguel, Terceira, Graciosa and Flores. Numerous rabbits were also examined in the visited islands (São Miguel, Terceira, Pico, São Jorge, Faial and Flores) and were found heavily parasited by their commonest flea, Spilopsyllus cuniculi. In Flores, however, that flea seems to be lacking. Though no systematic search has been done on domestic animals, the presence of Ctenocephalides f. felis is also reported from Flores, Terceira and Graciosa whereas C. canis has been found on a dog in Florès. The flea fauna of the Azorean archipelago is therefore characterized by a few species amongst the most cosmopolitan ones [less ▲]

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See detailEn mai élis qui te plaît
Durand, Pascal ULg

in Liège Université (1997), (été), 3

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See detailmorbidity in neonates afetr labour induction or cesarean section
Battisti, Oreste ULg; Bertrand, J. M.; Adant-François, A. et al

in vlaamse verenigong voor obstetrie en gynaecologie jaarboek (1997), 1

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See detailLe médicament du mois - Le Valaciclovir (Zelitrex)
Pierard, Gérald ULg; Nikkels, Arjen ULg

in Revue Médicale de Liège (1997), 52(8), 553-555

Un progrès important vient d'être réalisé dans le traitement du zona. Le valaciclovir (Zelitrex) est un nouveau médicament oral qui est en fait un précurseur de l'aciclovir. Sa biodisponibilité supérieure ... [more ▼]

Un progrès important vient d'être réalisé dans le traitement du zona. Le valaciclovir (Zelitrex) est un nouveau médicament oral qui est en fait un précurseur de l'aciclovir. Sa biodisponibilité supérieure à celle de l'aciclovir est à l'origine d'un progrès thérapeutique majeur dans la prise en charge du zona cutané chez des sujets immunocompétents de plus de 50 ans et du zona ophtalmique quel que soit l'âge du sujet. Le valaciclovir réduit tant la prévalence que la sévérité des douleurs associées au zona. [less ▲]

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See detailProductivity and Convergence in OECD Service Industries
Gouyette, Claudine; Perelman, Sergio ULg

in Structural Change and Economic Dynamics (1997), 8

The objective of this paper is threefold. First, to estimate the productivity performances realized in service and manufacturing industries by 13 OECD countries over the period 1970-1987. Secondly, to ... [more ▼]

The objective of this paper is threefold. First, to estimate the productivity performances realized in service and manufacturing industries by 13 OECD countries over the period 1970-1987. Secondly, to compare the productivity indicators computed under the alternative frontier analysis and Divisia index approaches. Thirdly, to test the convergence phenomenon in both industries, focusing on the catching-up process and on the interaction between productivity changes and capital intensity variations. The main results show that, contrary to the manufacturing sector and in spite of very low growth rates, productivity levels converge in services. Moreover, new investments in capital appear to exert an unexpected depressive effect on total factor productivity growth in service activities, while having a positive influence in manufacturing industries. [less ▲]

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See detailSaisie-arrêt et concours des créanciers: fin d'une controverse, note sous Cass. (1ère ch.), 11 avr. 1997
Georges, Frédéric ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (1997)

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See detailOptimization of murine CD8+ cytotoxic T-lymphocyte responses to pseudorabies virus
Depierreux, C.; Graff, I.; Lancelot, V. et al

in Journal of Immunological Methods (1997), 203

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See detailEssai comparatif de deux antalgiques, la floctafénine et le paracétamol, au cours de l’arthrose des membres inférieurs
Lequesne, M; Fannius, J; Reginster, Jean-Yves ULg et al

in Revue du Rhumatisme (1997), 64(5), 349-355

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See detailEnergy savings in methanol synthesis: Use of heat integration techniques and simulation tools.
Maréchal, François; Heyen, Georges ULg; Kalitventzeff, Boris ULg

in Computers & Chemical Engineering (1997), 21(Suppl. S), 511-516

Starting with a classical process for producing methanol using the reforming and synthesis steps, a combined approach applying simulation models and a new synthesis strategy, named Effect Modelling and ... [more ▼]

Starting with a classical process for producing methanol using the reforming and synthesis steps, a combined approach applying simulation models and a new synthesis strategy, named Effect Modelling and Optimisation (EMO), has been used to optimise the energy efficiency of the process. The method allows to identify different ways of improving the energy efficiency of the process. The modifications concern the synthesis reactor and the reforming reactor designs, the exploitation of the purge stream as fuel gas to satisfy the process requirement and its integration to a gas turbine system. The EMO approach allows to target the impact of a process modification at the global level of the energy cost of the process, including the combined production of heat and mechanical power in a gas turbine and the steam network. Starting with a classical methane conversion of 60% for the classical system, we identify solutions with up to 93% of the overall methane conversion when we transform the net mechanical power produced into methane savings at the country level. The interest of the approach is the possibility of computing the impact of the process modifications suggested by the analysis of the shape of the heat cascade on the overall energy balance of the plant without having to simulate in many details the steam and the heat exchanger network. [less ▲]

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See detailNo-carrier-added asymmetric synthesis of alpha-methyl-alpha-amino acids labelled with fluorine-18
Damhaut, Philippe; Lemaire, Christian ULg; Plenevaux, Alain ULg et al

in Tetrahedron (1997), 53(16), 5785-5796

Various [18F]fluoro aromatic α-methyl-L-amino acids 11 have been synthesized with high enantiomeric purity (ee > 97%). These new radiopharmaceuticals for Positron Emission Tomography (PET), potential ... [more ▼]

Various [18F]fluoro aromatic α-methyl-L-amino acids 11 have been synthesized with high enantiomeric purity (ee > 97%). These new radiopharmaceuticals for Positron Emission Tomography (PET), potential inhibitors of enzymatic functions, were regiospecifically labelled by nucleophilic substitution on trimethylammoniumbenzaldehyde triflate precursors 9. The [18F]fluoro aromatic aldehydes 12 obtained were easily converted to the corresponding [18F]fluorobenzyl halides [13 (X = 1)]. After alkylation of the lithium enolate of (2S,5S)-l-tert-Boc-2-tert-butyl-3,5-dimethyl-imidazolidin-4-one 2, the adducts were cleaved to give, after HPLC purification, various [18F]fluoro-α-methyl amino acid analogs with radiochemical yields of 10% (End of Bombardment, EOB) after a synthesis time of 120 min. The corresponding [19F]fluorinated amino acids 4 and [19F]fluoro intermediates were also prepared. [less ▲]

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See detailSequence Analysis of the Bovine Herpesvirus Type 1 Genes Homologous to the DNA Polymerase (Ul30), the Major DNA-Binding Protein (Ul29) and Icp18.5 Assembly Protein (Ul28) Genes of Herpes Simplex Virus
Meyer, Gilles; Vlcek, C.; Paces, V. et al

in Archives of Virology (1997), 142(1), 89-102

The nucleotide sequence of a 10.5 kb region (map position 0.332 to 0.410) of bovine herpesvirus type 1 (BHV-1) was determined. This region contained three open reading frames (ORFs) homologous to herpes ... [more ▼]

The nucleotide sequence of a 10.5 kb region (map position 0.332 to 0.410) of bovine herpesvirus type 1 (BHV-1) was determined. This region contained three open reading frames (ORFs) homologous to herpes simplex virus DNA polymerase catalytic subunit (DNApol, UL30), major DNA-binding protein (MDBP, UL29) and ICP18.5 assembly protein (ICP18.5, UL28). The BHV-1 DNApol. MDBP and ICP18.5 ORFs were 1246, 1203 and 826 amino acids long with a calculated molecular mass of 134.2 kDa, 124.4 kDa and 86.9 kDa, respectively. They showed a high homology with alphaherpesvirus homologs despite large differences in the G + C content of the UL30-UL28 segment ranging from 44.4% for varicella zoster virus to 71.5% for BHV-1. Particularly well conserved among Alphaherpesvirinae are the putative functional domains of the DNApol and MDBP proteins which are discussed. Phylogenetic analysis revealed that BHV-1 clustered in the Varicellovirus genus with the animal D-type viruses. In this group, the BHV-1 position was shown to vary according to the investigated genes. Indeed, pseudorabies virus clustered with BHV-1 in the DNApol tree but with equine herpesvirus 1 in the ICP18.5 tree. [less ▲]

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See detailLinear Benard-Marangoni instability in rigid circular containers
Dauby, Pierre ULg; Lebon, Georgy ULg; Bouhy, E.

in Physical Review. E : Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics (1997), 56(1), 520-530

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See detailInduction of membrane-type matrix metalloproteinase 1 (MT1-MMP) expression in human fibroblasts by breast adenocarcinoma cells.
Polette, M.; Gilles, Christine ULg; Marchand, V. et al

in Clinical & Experimental Metastasis (1997), 15(2), 157-63

Membrane-type matrix metalloproteinase 1 (MT1-MMP) has been recently described as an activator of proMMP-2 (MMP-2) which is involved in tumor invasion. We have shown by in situ hybridization that MT1-MMP ... [more ▼]

Membrane-type matrix metalloproteinase 1 (MT1-MMP) has been recently described as an activator of proMMP-2 (MMP-2) which is involved in tumor invasion. We have shown by in situ hybridization that MT1-MMP is produced by stromal cells in close contact to preinvasive and invasive tumor cells of breast carcinomas. Of particular interest was the observation that some fibroblasts express this enzyme in focal areas in preinvasive lesions, suggesting that particular tumor cells may stimulate fibroblasts to produce MT1-MMP. We have therefore compared the ability of two different breast cancer cell lines, one non-invasive (MCF7) and one invasive (MDA-MB-231) to stimulate MT1-MMP production in human fibroblasts with consequent proMMP-2-activation. The MDA-MB-231 conditioned medium induced MT1-MMP mRNAs in human fibroblasts and a parallel activation of proMMP-2 whereas MCF7 conditioned medium did not have any effect. These results suggest the existence of soluble factor(s) secreted by invasive or some preinvasive breast tumor cells which stimulate fibroblasts to produce and activate MMPs, and emphasize the cooperation between cancer and stromal cells in tumor invasion. [less ▲]

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See detailImaging the solar corona in the EUV
Delaboudiniere, J.-P.; Stern, R. A.; Maucherat, A. et al

in Advances in Space Research (1997), 20

The SOHO (SOlar and Heliospheric Observatory) satellite was launched on December 2nd 1995. After arriving at the Earth-Sun (L1) Lagrangian point on February 14th 1996, it began to continuously observe the ... [more ▼]

The SOHO (SOlar and Heliospheric Observatory) satellite was launched on December 2nd 1995. After arriving at the Earth-Sun (L1) Lagrangian point on February 14th 1996, it began to continuously observe the Sun. As one of the instruments onboard SOHO, the EIT (Extreme ultraviolet Imaging Telescope) images the Sun's corona in 4 EUV wavelengths. The He II filter at 304 AË images the chromosphere and the base of the transition region at a temperature of 5 - 8 x 10^4 K; the Fe IX-X filter at 171 AË images the corona at a temperature of ~ 1.3 x 10^6 K; the Fe XII filter at 195 AË images the quiet corona outside coronal holes at a temperature of ~ 1.6 x 10^6 K; and the Fe XV filter at 284 AË images active regions with a temperature of ~ 2.0 x 10^6 K. About 5000 images have been obtained up to the present. In this paper, we describe also some aspects of the telescope and the detector performance for application in the observations. Images and movies of all the wavelengths allow a look at different phenomena present in the Sun's corona, and in particular, magnetic field reconnection. [less ▲]

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See detailChanging sensitivity to duration in human scalar timing: An experiment, a review, and some possible explanations
Ferrara, André ULg; Lejeune, Helga ULg; Wearden, J. H.

in Quarterly Journal of Experimental Psychology. B, Comparative & Physiological Psychology (1997), 50B

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See detailLa bryoflore d'une forêt alluviale fonctionnelle: la réserve naturelle rhénane de l'Ile de Rhinau (Bas-Rhin, France)
Klein, J. P.; Siebel, H.; Vanderpoorten, Alain ULg

in Mitteilungen des Badischen Landesvereins für Naturkunde und Naturschutz (1997), 16

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See detailPit-1 gene polymorphism, milk yield, and conformation traits for Italian Holstein-Friesian bulls
Renaville, Robert ULg; Gengler, Nicolas ULg; Vrech, E. et al

in Journal of Dairy Science (1997), 80(12), 34313438

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See detailRecognition of the latency-associated immediate early protein IE63 of varicella-zoster virus by human memory T-lymphocytes
Sadzot-Delvaux, Catherine ULg; Kinchington, Paul R.; Debrus, Serge et al

in Journal of Immunology (1997), 159(6), 2802-2806

Varicella-zoster virus (VZV) is a human alpha herpesvirus that establishes latency in sensory ganglia. Latency is characterized by the abundant expression of the immediate early protein 63 (IE63), whereas ... [more ▼]

Varicella-zoster virus (VZV) is a human alpha herpesvirus that establishes latency in sensory ganglia. Latency is characterized by the abundant expression of the immediate early protein 63 (IE63), whereas other viral proteins have not yet been detected during the quiescent phase of VZV infection. The IE63 protein is a component of the virion and is expressed very early in the infectious cycle. The IE63 protein is also expressed in skin during episodes of varicella and herpes zoster. We have evaluated the cell-mediated immune response against IE63 in naturally immune adults with a history of chickenpox, by T lymphoproliferation and cytotoxicity assays. Among donors who had T cell proliferation to unfractionated VZV Ags from infected cell extract, 59% had T cell recognition of purified IE63. The CTL response to IE63 was equivalent to CTL recognition of IE62, the major tegument component of VZV whose immunogenicity has been previously described. IgG Abs against IE63 were detected in serum from healthy immune adults. These results indicate that IE63 is an important target of immunity to VZV. T cell recognition of IE63 is likely to be involved in controlling VZV reactivation from latency. [less ▲]

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See detailEstimation of (co)variance components for Jersey type traits using a repeatability model
Gengler, Nicolas ULg; Wiggans, G. R.; Wright, J. R. et al

in Journal of Dairy Science (1997), 80(8), 1801-1806

(Co)variance components for final score and 15 linear type traits of Jersey cows were estimated by multitrait REML using multiple diagonalization and a repeatability model with 34,999 records of 22,354 ... [more ▼]

(Co)variance components for final score and 15 linear type traits of Jersey cows were estimated by multitrait REML using multiple diagonalization and a repeatability model with 34,999 records of 22,354 cows. Multiple diagonalization gave relative off-diagonals (ratio of squared off-diagonals to the product of diagonals) of <0.1%. Heritabilities and repeatabilities, respectively, were estimated as 0.29 and 0.48 for final score, 0.40 and 0.57 for stature, 0.26 and 0.39 for strength, 0.28 and 0.43 for dairy form, 0.13 and 0.25 for foot angle, 0.13 and 0.25 for rear legs (side view), 0.27 and 0.41 for body depth, 0.31 and 0.52 for rump angle, 0.22 and 0.33 for thurl width, 0.22 and 0.36 for fore udder attachment, 0.28 and 0.46 for rear udder height, 0.26 and 0.42 for rear udder width, 0.32 and 0.48 for udder depth, 0.20 and 0.36 for udder cleft, 0.29 and 0.46 for front teat placement, and 0.31 and 0.48 for teat length. Estimates of heritability generally were higher, and estimates of repeatability were lower, than values used previously for USDA genetic evaluations, which were based on data from the 1970s and early 1980s. Final score was highly correlated both genetically and phenotypically with dairy form and rear udder traits. These estimates of heritabilities and (co)variance components are necessary for multitrait genetic evaluation of linear type traits of US Jerseys. [less ▲]

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See detailA Direct Dopaminergic Control of Aromatase Activity in the Quail Preoptic Area
Baillien, M.; Balthazart, Jacques ULg

in Journal of Steroid Biochemistry & Molecular Biology (1997), 63(1-3, Sep-Oct), 99-113

In the quail preoptic area (POA) anatomical and pharmacological data suggest that catecholamines may be implicated in the control of testosterone (T) aromatization into estrogens. The biochemical ... [more ▼]

In the quail preoptic area (POA) anatomical and pharmacological data suggest that catecholamines may be implicated in the control of testosterone (T) aromatization into estrogens. The biochemical mechanism(s) mediating this control of the enzyme activity is (are) however unexplored. The present studies were carried out to investigate whether the catecholamines, dopamine (DA) and norepinephrine (NE) are able to directly affect aromatase activity (AA) measured during in vitro incubations of POA homogenates. AA was quantified in the POA-hypothalamus of adult male Japanese quail by measuring the tritiated water production from [1beta-3H]-androstenedione. Enzyme activity was linear as a function of the incubation time and of the protein content of homogenates. It exhibited a typical Michaelis-Menten kinetics, with an apparent Km of 2.8 nM and a Vmax of 266.6 fmol h(-1) mg wet weight(-1). AA was then measured at a substrate concentration of 25 nM in the presence of catecholamines and some of their receptor agonists or antagonists, at two concentrations, 10(-3) and 10(-6) M. Norepinephrine and prazosin (alpha1-adrenergic antagonist) had no or very limited effects on AA at both concentrations. In contrast, DA and some D1 and/or D2 receptor agonists (apomorphine[D1/D2], SKF-38393 [D1] and RU-24213 [D2]) depressed AA by 40 to 70% at the 10(-3) M concentration. One D2 receptor antagonist also produced a major inhibition of AA (sulpiride) while other antagonists either had no significant effect or only produced moderate decreases in enzyme activity (SCH-23390 [D1], spiperone [D2], pimozide [D2]) as did two DA indirect agonists, amfonelic acid and nomifensine. The inhibitory effect of the agonists was not antagonized by the less active antagonists, SCH-23390 [D1] or spiperone [D2]. Taken together these results suggest that the inhibitory effects do not involve specific binding of DA or its agonists/antagonists to dopaminergic receptors mediating changes in cAMP concentration. This conclusion is also supported by the observation that addition of dibutyryl cAMP did not change brain AA. It appears more likely that DA and dopaminergic drugs inhibit AA by a direct effect on the enzyme, as suggested by the competitive nature of DA and SKF-38393 inhibition of AA (Ki's of 59 and 84 microM, respectively). The functional significance of this effect should still be demonstrated but this mechanism may represent an important physiological pathway through which neurotransmitters could rapidly affect steroid-dependent processes such as the neural synthesis of estrogens. This would provide a mean by which environmental stimuli could affect reproductive behavior and physiology. [less ▲]

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See detailSpinal ischaemia after surgery for abdominal infrarenal aortic aneurysm. Diagnosis with nuclear magnetic resonance.
Defraigne, Jean-Olivier ULg; OTTO, Bernard ULg; SakalihasanN, Natzi ULg et al

in Acta Chirurgica Belgica (1997), 97(5), 250-6

A 76-year-old man underwent surgery for an infrarenal aortic aneurysm reaching 6 cm in maximal transverse diameter. The aorta was crossclamped below the level of the renal arteries. A tube graft was ... [more ▼]

A 76-year-old man underwent surgery for an infrarenal aortic aneurysm reaching 6 cm in maximal transverse diameter. The aorta was crossclamped below the level of the renal arteries. A tube graft was interposed and tend between the infrarenal aorta and the aortic bifurcation. Due to leakage on the suture line two consecutive episodes of crossclamping for a total duration of 40 min. were required. No hypotension was noted during or after the procedure. After operation, the patient complained of difficulties to move both legs and neurologic examination demonstrated paraparesis, with mild sensory deficit. Faecal and urinary incontinences were also noted and urodynamic testing demonstrated sphincterovesical palsy. Nuclear magnetic resonance imaging detected an ischaemic zone in the spinal cord at the level of T11. Faecal incontinence and motor deficit partially resolved but no bladder function recovery was observed. Spinal ischaemia is a rare complication after abdominal aortic surgery. Several risk factors have been suggested which include level and duration of the aortic crossclamping, possible interruption of the spinal cord blood supply via the greater medullary artery (the so-called artery of Adamkiewicz), presence of intra- or postoperative episodes of hypotension, atheromatous embolization, underlying occlusive arteriosclerosis of spinal arteries, and respect or not of the hypogastric circulation. In our case, the duration of the crossclamping and interruption of the blood flow in lumbar arteries probably supplying the distal spinal cord were likely contributive factors. [less ▲]

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See detailMultiple seawater-derived geochemical signatures in Indian oceanic pelagic clays
Fagel, Nathalie ULg; André, Luc; Debrabant, Pierre

in Geochimica et Cosmochimica Acta (1997), 61(5), 989-1008

This paper reports a geochemical study of oceanic clays. Major and trace elements were analyzed on smectite-rich, clay size (<2 mu m) samples, bulk sediments, and leachate residues from the Central Indian ... [more ▼]

This paper reports a geochemical study of oceanic clays. Major and trace elements were analyzed on smectite-rich, clay size (<2 mu m) samples, bulk sediments, and leachate residues from the Central Indian Basin. Sr-Nd isotopes were also studied to investigate their geochemical evolution during transport in the water column, sedimentation, and diagenesis. The region is of special interest because the sedimentation records the interaction between the detrital supply from the Bengal Fan in the north and the biosiliceous input associated with the equatorial divergence in the south. The clay size fractions display extremely variable trace element contents, e.g., [Ba] = 100-5000 ppm, [Sr] = 20-200 ppm, Ce/Ce* = 0.9-3.3, [Nd] = 10-50 ppm. Although in the argillaceous samples, clay size fractions have a similar trace element imprint to the bulk sediment, some major fractionations occur in the biosiliceous samples between the clay and the bulk sediment, especially for Sr and rare earth elements (REE). Three major components may account for the variable geochemical signatures of these pelagic clays. The first component (component A), already identified by Fagel et al. (1994), is characterized by a homogeneous geochemical signature (La-N/Yb-N = 1.03-1.05; Th/Ta = 12.8-21.1; Ba/Th similar to 28) and a nonradiogenic Nd isotopic composition (Nd-143/Nd-144 similar to 0.511880): it traces a detrital Himalayan-derived origin. The two other components display a seawater-derived isotopic composition with global Sr (Sr-87/Sr-86 similar to 0.709060) and regional Indian Ocean Nd(Nd-143/Nd-144 similar to 0.512200) signatures. Both components are enriched in Sr and Ba (Sr similar to 150 ppm, Ba/Th similar to 500), and they are either enriched in light rare earth elements (LREE, e.g., Nd similar to 50 ppm) in the argillaceous sediments (component B) or LREE-depleted (Nd < 20 ppm) in the biosiliceous sediments (component C). The frequent occurrence of micrometric (<5 mu m) Sr-REE-Th enriched barite grains showing three major habits (rhombic, rounded, dendritic) suggests that these biologically-derived mineral phases had a major role in the genesis of components B and C. A strong clay-barite equilibration is deduced from the Post Archean Australian Shales PAAS-like REE patterns of these barites and the Ba enrichment of the clays. We suggest that it results from two successive mechanisms of exchange. First, at the top of the oxygen minimum zone, the microbial-induced decay of organic matter is proposed to trigger a series of trace element transfers between the various particulate-forming components (clays, barites, and decaying organic coatings). This is proposed as the origin of the clay component B: the barite-derived components (Ba, Sr) and the organic-derived positive Ce anomaly are imported to the clay particles while the PAAS signature of the clays is retained by the remaining barite crystals. Second, after settling, the barites are believed to partly dissolve and recrystallize, especially in the anoxic part of the sedimentary column. This diagenetic barite dissolution is proposed as the origin of the clay component C. Copyright (C) 1997 Elsevier Science Ltd. [less ▲]

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See detailUtilisation de l'habitat par la sérotine commune Eptesicus serotinus en Lorraine belge
Kervyn, Thierry; Brasseur, Jasmine; Libois, Roland ULg

in Bulletin de la Société Neuchâteloise des Sciences Naturelles (1997), 120(2), 35-41

The radiotracking of 10 serotine bats during a period of 73 nights shows that the animals hunt mainly at forest edges and above meadows. The mean distance between the main diurnal roost and hunting ... [more ▼]

The radiotracking of 10 serotine bats during a period of 73 nights shows that the animals hunt mainly at forest edges and above meadows. The mean distance between the main diurnal roost and hunting grounds is 2.1 +/- 1.2 km (n = 24). Secondary diurnal roosts are used within a radius of 250 m of the main diurnal quarters. Nocturnal resting places are situated in beech forests (Fagus sylvatica) near feeding areas. The activity area (minumum area method) of radiotracked serotine bats, all originating from the same colony, stretches to 15.8 km². [less ▲]

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See detailCharacterization of CuInTe2 thin films prepared by flash evaporation
Boustani, M.; El Assali, K.; Bekkay, T. et al

in Semiconductor Science & Technology (1997), 12

Thin films of CuInTe2 were grown by flash evaporation. The influence of the substrate temperature Ts during film deposition on the properties of the thin films was examined. CuInTe2 films were ... [more ▼]

Thin films of CuInTe2 were grown by flash evaporation. The influence of the substrate temperature Ts during film deposition on the properties of the thin films was examined. CuInTe2 films were structurally characterized by the grazing incidence x-ray diffraction (GIXD) technique. Investigation by this technique demonstrates that the surface of thin films of CuInTe2 prepared by flash vaporation at Ts > 100 °C exhibits the chalcopyrite structure with additional binary compounds in the surface. However, in the volume the films exhibit the chalcopyrite structure only; no foreign phases were observed. X-ray reflectometry was utilized to evaluate the critical reflection angle bc of CuInTe2 (bCuInTe2 c 0.32°) which permitted us to calculate the density of the films to be 6 g cm−3. The evaporated films were p type and the films deposited at Ts = 100 °C had a resistivity in the range 0.3–2 cm. From optical measurements we have determined the optical energy gap Eg 0.94 eV and the effective reduced mass m*r 0.07me . [less ▲]

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See detailApplication of canonical transformation with missing values to multitrait evaluation of Jersey type
Gengler, Nicolas ULg; Wiggans, G. R.; Wright, J. R. et al

in Journal of Dairy Science (1997), 80(10), 2563-2571

A multitrait animal model was used to calculate predicted transmitting ability and reliabilities for final score and 15 linear type traits of 225,632 US Jersey cows. Records were adjusted for age and ... [more ▼]

A multitrait animal model was used to calculate predicted transmitting ability and reliabilities for final score and 15 linear type traits of 225,632 US Jersey cows. Records were adjusted for age and stage of lactation before analysis. The model contained effects for interactions of herd and date scored; year scored, parity, and age; and herd and sire; effects of permanent environment and additive genetics were also included. Of the 381,511 records included, some observations were missing for final score (8%), body depth (43%), and teat length (33%). The evaluation system used a canonical transformation, included several random effects, and estimated missing values with each iteration. Inbreeding was considered in the computations. Convergence was achieved in approximately 50 rounds of iteration. Correlations between animal and sire model predicted transmitting ability ranged from 0.56 to 0.95 and generally were higher for bulls than for cows and for more recent birth years. Genetic trend was strongly positive for dairy form, final score, and rear udder traits (height and width) and negative for udder depth. For other traits, genetic trend was small. This methodology should improve the accuracy of genetic evaluations for type traits of US Jerseys. [less ▲]

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See detailCell-line specific radiosensitizing effect of zalcitabine (DDC)
Coucke, Philippe ULg; Li, Ye-Xiong; Copaceanu, Marie-Laure et al

in Acta Oncologica (1997)

The potential of zalcitabine (ddC) to act as an ionizing radiation response modifier was tested on exponentially growing human cancer cells in vitro. Two human cell lines, WiDr (colon) and MCF-7 (breast ... [more ▼]

The potential of zalcitabine (ddC) to act as an ionizing radiation response modifier was tested on exponentially growing human cancer cells in vitro. Two human cell lines, WiDr (colon) and MCF-7 (breast) were exposed to ddC at 10 p M concentration for various lengths of tide (18, 24, 48 and 72 h). On the WiDr cell line the dual effect of concentration and duration of exposure prior to irradiation was investigated. Experimental endpoints were clonogenicity and viability, as measured by colony formation assay (CFA) and MTT assay respectively. The impact on cell-cycle distribution prior to irradiation was assessed by flow cytometry using a double labeling technique (propidium iodide and bromodeoxyuridine pulse label). A significant reduction in surviving fraction and viability was observed for WiDr-cells irradiated after pre-exposure to 10 pM for 18, 48 and 72 h as compared to corresponding irradiated controls. At lower concentrations (1 and 5 pM), the radiosensitizing effect was only significant after a 72-h exposure (assessed by CFA). For MCF-7, ddC induced a significant modification of the dose response only with 24 and 48 h preincubation. However, the overall effect was less pronounced as compared to WiDr. Cell-cycle analysis showed accumulation in S-phase, 48 and 72 h after treatment with 10 pM ddC in the WiDr cells, with a progressive shift to late S-phase as shown by the biparametric analysis. The degree of radiosensitization is cell-line dependent with the most important sensitization observed on the most <<radioresistant cell line>>, ix., the cell line with the lowest alpha value and highest SF 2 (WiDr). For WiDr, radiosensitization by ddC depends on the duration of exposure and the concentration of the drug. Received 29 February 1996 Accepted 10 December 1996 [less ▲]

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See detailThe effects of shunting sytemic venous blood into the portal circulation. Review, experiences and future perspectives
D'Silva, Milbhor; Wolf, P.; Bonnet, Pierre ULg

in Archives of Hellenic Medecine (1997), 14(3), 246-264

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See detailExpression of insulin-related peptides in the human thymus
Geenen, Vincent ULg; Lefebvre, Pierre ULg

in International Diabetes Monitor (1997), 9

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See detailWhole organ vascularized cluster heart-thymus allografting : Experiences with a novel experimental model
D'Silva, Milbhor; Antoniou, E.; Howie, A. J. et al

in Cardiovascular Engineering : An International Journal (1997), 2(1), 65-74

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See detailField observations of the spawning behaviour of European grayling
Darchambeau, François ULg; Poncin, Pascal ULg

in Journal of Fish Biology (1997), 51(5), 1066-1068

During observations of the River Ourthe, Belgium, 70 spawning attempts were recorded during the reproductive period of the European grayling. Thirty-six per sent of the spawning attempts proceeded to ... [more ▼]

During observations of the River Ourthe, Belgium, 70 spawning attempts were recorded during the reproductive period of the European grayling. Thirty-six per sent of the spawning attempts proceeded to completion, while interference by another male may explain some of the incomplete acts. Sneaking behaviour was observed and one spawning act included two males and one female. (C) 1997 The Fisheries Society of the British Isles. [less ▲]

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See detailLe comportement de reproduction du goujon, Gobio gobio, en aquarium
Poncin, Pascal ULg; Jeandarme, J.; Rinchard, J. et al

in Bull. Fr. Pêche Piscic. (1997)

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See detailEvolution of coronary atherosclerosis in patients with mild coronary artery disease studied by serial quantitative coronary angiography at 2 and 4 years follow-up. The Multicenter Anti-Atheroma Study (MAAS) Investigators.
Vos, J.; de Feyter, P. J.; Kingma, J. H. et al

in European heart journal (1997), 18(7), 1081-9

AIMS: Angiographic studies on the natural course of both focal and diffuse coronary atherosclerosis have not been performed before, but can both be assessed by quantitative coronary angiography. The ... [more ▼]

AIMS: Angiographic studies on the natural course of both focal and diffuse coronary atherosclerosis have not been performed before, but can both be assessed by quantitative coronary angiography. The objective of this study was to describe the natural course of focal and diffuse coronary atherosclerosis over time. METHODS AND RESULTS: In 129 patients with mild coronary artery disease, but not on lipid-lowering medication, three coronary angiograms were made each 2 years apart. Nine hundred and sixty five angiographically diseased and non-diseased segments were analysed by quantitative coronary angiography. Mean lumen diameter and minimal lumen diameter were used as measures of diffuse and focal coronary atherosclerosis. Mean lumen diameter and minimum lumen diameter decreased by 0.02 and 0.03 mm per year. The rate of progression was similar in the angiographically non-diseased, as in the mildly and moderately diseased segments. Progression of diffuse coronary atherosclerosis was largest in severely stenosed lesions (percentage diameter stenosis > or = 50%) and in the right coronary artery with a loss of 0.19 mm and 0.16 mm in mean lumen diameter. Progression of focal disease was most prominent in new and mild lesions and the right coronary artery, with a decrease in minimum lumen diameter of 0.34 mm and 0.22 mm. In most subgroups, progression occurred gradually over time. On a per segment level, progression and the occurrence of new lesions occurred in 4.4% and 4.2%. Regression and disappearance of a lesions was found in 2.3% and 1.9%. On a per patient level, 36% were progressors, 12% had a mixed response, 36% were stable, and 16% were regressors. CONCLUSION: Diffuse and focal coronary atherosclerosis progressed at the same rate in the first and second 2 years in stenosed and non-stenosed segments. The rate of coronary atherosclerosis progression was small, but was higher for focal than for diffuse disease. A minority of lesions progressed and spontaneous regression was rare. [less ▲]

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See detailHydrostatic flattening, core structure, and translational mode of the inner core
Denis, Carlo; Rogister, Yves; Amalvict, Martine et al

in Physics of the Earth & Planetary Interiors (1997), 99(3-4), 195-206

Modern Earth models are constrained by an inertia coefficient y*=J(2)/H approximate to 0.3308 which leads to a so-called 'hydrostatic' flattening f(hyd) approximate to 1/299.9. The latter is in rather ... [more ▼]

Modern Earth models are constrained by an inertia coefficient y*=J(2)/H approximate to 0.3308 which leads to a so-called 'hydrostatic' flattening f(hyd) approximate to 1/299.9. The latter is in rather large disagreement with the observed flattening f approximate to 1/298.3. We show that a more satisfactory value of the inertia coefficient for constraining a standard Earth model is y approximate to 0.332, consistent with a hydrostatic flattening of about 1/298.6. The change of the value of the inertia coefficient from about 0.331 to about 0.332 significantly alters the density structure of the core, notably the density jump at the inner core boundary. It brings, as a by-produce, the hydrostatic values of J(2) and H to better agreement with the observed values than is presently thought, and most probably leads for the Slichter mode to a period of much longer than 5.42 h, which is the value computed for PREM. [less ▲]

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See detailAlteration of radiation response in vitro by simultaneous modulation of the de novo and salvage pathways to deoxynucleoside triphosphate pool by (E)-2′-Deoxy-(Fluoromethylene)cytidine and thymidine analogs
Coucke, Philippe ULg; Li, Ye-Xiong; Cottin, Eliane et al

in International Journal of Radiation, Oncology, Biology, Physics (1997), 39(2 (supp1)), 257

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See detailMetacognitive Realism: A cognitive Style or a Learning Strategy?
Jans, Véronique; Leclercq, Dieudonné ULg

in British Journal of Educational Technology (1997), 17(1-2),

Identifies metacognitive realism as the accurate assessment by a learner of their knowledge on a subject. Considers whether realism in metacognition is a stable trait, and possible influences. Briefly ... [more ▼]

Identifies metacognitive realism as the accurate assessment by a learner of their knowledge on a subject. Considers whether realism in metacognition is a stable trait, and possible influences. Briefly reviews the literature and experimental evidence and concludes that metacognitive realism is both style and strategy. [less ▲]

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See detailEtude morphométrique du sabot et du petit sésamoïde du cheval
Gabriel, Annick ULg; Detilleux, J.; Jolly, S. et al

in Annales de Médecine Vétérinaire (1997), 147

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See detailAn Easy Way to Increase the Finite-Sample Efficiency of the Resampled Minimum Volume Ellipsoid Estimator
Croux, Christophe ULg; Haesbroeck, Gentiane ULg

in Computational Statistics & Data Analysis (1997), 25

In a robust analysis, the minimum volume ellipsoid (MVE) estimator is very often used to estimate both multivariate location and scatter. The MVE estimator for the scatter matrix is defined as the ... [more ▼]

In a robust analysis, the minimum volume ellipsoid (MVE) estimator is very often used to estimate both multivariate location and scatter. The MVE estimator for the scatter matrix is defined as the smallest ellipsoid covering half of the observations, while the MVE location estimator is the midpoint of that ellipsoid. The MVE estimators can be computed by minimizing a certain criterion over a high-dimensional space. In practice, one mostly uses algorithms based on minimization of the objective function over a sequence of trial estimates. One of these estimators uses a resampling scheme, and yields the (p + 1)-subset estimator. In this note, we show how this estimator can easily be adapted, yielding a considerable increase of statistical efficiency at finite samples. This gain in precision is also observed when sampling from contaminated distributions, and it becomes larger when the dimension increases. Therefore, we do not need more computation time nor do we lose robustness properties. Moreover, only a few lines have to be added to existing computer programs. The key idea is to average over several trials close to the optimum, instead of just picking out the trial with the lowest value for the objective function. The resulting estimator keeps the equivariance and robustness properties of the original MVE estimator. This idea can also be applied to several other robust estimators, including least-trimmed-squares regression. [less ▲]

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See detailLes modes de transmission du virus de l'hépatite C
Delwaide, Jean ULg; Gerard, Christiane ULg; Sondag, Danièle ULg et al

in Médecine & Chirurgie Digestives (1997), 26

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See detailOptimisation et application de la RAPD (random amplified polymorphic DNA) dans un programme de selection recurrente chez le cotonnier (Gossypium spp.).
Vroh Bi, I.; Du Jardin, Patrick ULg; Mergeai, Guy ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1997), 1(2),

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See detailComplications hepatiques de la chimiotherapie. De la cytolyse banale a la maladie veino-occlusive du foie.
Baron, Frédéric ULg; Beguin, Yves ULg

in Revue Médicale de Liège (1997), 52(2), 93-7

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See detailProtection possessoire et convention. Quand l'usufruitier devient bailleur
Lecocq, Pascale ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (1997)

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See detailAllozyme diversity and genetic structure in South - Western populations of Heather, Calluna vulgaris (L.) Hull
Mahy, Grégory ULg; Vekemans, Xavier; Jacquemart, Anne Laure et al

in New Phytologist (1997), 137

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See detailNouvelles recherches dans le site magdalénien du Trou da Somme (Hastière)
López Bayón, Ignacio; Léotard, Jean-Marc; Otte, Marcel ULg et al

in Notae Praehistoricae (1997), 17

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See detailRecommandations pour la prévention de l’infection tuberculeuse dans les institutions de soins
Gosset, Christiane ULg; Prignot, J.; Schandevyl, W. et al

in Revue de l’Association Belge des Technologues de Laboratoire = Tijdschrift van de Belgische Vereniging van Laboratoriumtechnologen (1997), 24(1), 50-56

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See detailInfestation par Paramphistomum sp. chez le bovin : description d'un premier cas en Belgique
Losson, Bertrand ULg; Cassart, Dominique ULg; Mignon, Bernard ULg

in Annales de Médecine Vétérinaire (1997), 142

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See detailMoufang affine buildings have Moufang spherical buildings at infinity
Van Maldeghem, H.; Van Steen, Kristel ULg

in Glasgow Mathematical Journal (1997), 39(Part 3), 237-241

We show in a direct and elementary way that the spherical building at infinity of every rank 3 affine building which satisfies Tits' Moufang condition, is itself a Moufang building. This result is also ... [more ▼]

We show in a direct and elementary way that the spherical building at infinity of every rank 3 affine building which satisfies Tits' Moufang condition, is itself a Moufang building. This result is also true for higher rank affine buildings by Tits' classification [4]. [less ▲]

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See detailPreuve et conséquences de la séparation de fait en matière d’assujettissement et d’établissement de l’impôt des personnes physiques
Orban, Lionel ULg

in Commission Université-Palais – Formation permanente – Droit fiscal. Volume XIV – Février 1997 (1997)

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See detailTerm analysis and Hyperfine Structure in Neutral Vanadium
Palmeri, P.; Biémont, Emile ULg; Quinet, P. et al

in Physica Scripta (1997), 55

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See detailDilatometric and calorimetric study of the graphitisation of high chromium cast iron
Terziev, L.; Lecomte-Beckers, Jacqueline ULg; Bojinov, V. et al

in Journal de Chimie Physique et de Physico-Chimie Biologique (1997), 94[5]

Cette étude est consacrée à la formation du graphite dans des fontes à haute teneur en chrome (8%) et spécialement à la détermination des conditions de formation de graphite secondaire par des traitements ... [more ▼]

Cette étude est consacrée à la formation du graphite dans des fontes à haute teneur en chrome (8%) et spécialement à la détermination des conditions de formation de graphite secondaire par des traitements thermiques adaptés. La solidification de la fonte étudiée a été examinée par analyse thermique différentielle (ATD). Les effets d'un traitement à haute température ont été examinés à la fois par calorimétrie et dilatomètre différentielle. Le graphite primaire se forme vers 950°C. Le graphite secondaire précipite sur le graphite primaire lors du traitement de déstabilisation de l'austénite à haute température. La forme et la quantité de graphite secondaire dépendent de la température de traitement. [less ▲]

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See detailLa responsabilité civile et professionnelle des administrateurs
Caprasse, Olivier ULg

in Actualités du Droit (1997)

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See detailReflections on risk and resilience in adolescence
Born, Michel ULg; Jackson, Sandy; Jacob, Marie-Noël

in Journal of adolescence (1997), 20

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See detailPeritoneal endometriosis, ovarian endometriosis, and adenomyotic nodules of the rectovaginal septum are three different entities
NISOLLE, Michelle ULg; Donnez, Jacques

in Fertility and Sterility (1997), 68(4), 585-596

Objective: To review the histogenesis of peritoneal, ovarian, and rectovaginal endometriotic lesions. Design: The comparison of morphologic, morphometric, and histochemical data observed in each type of ... [more ▼]

Objective: To review the histogenesis of peritoneal, ovarian, and rectovaginal endometriotic lesions. Design: The comparison of morphologic, morphometric, and histochemical data observed in each type of lesion. Setting: A university hospital department of gynecology. Patient(s): Patients complaining of infertility or pelvic pain with laparoscopically proved endometriosis. Intervention(s): Laparoscopy was performed, and biopsy specimens from the endometriotic lesions were histologically studied. Result(s): Three types of endometriotic lesions must be considered: peritoneal, ovarian, and rectovaginal. Morphologic and morphometric data show similarities between eutopic endometrium and red peritoneal lesions, suggesting that these lesions are the first stage of early implantation of endometrial glands and stroma. After partial shedding, the red lesions regrow constantly. The shedding induces an inflammatory reaction, provoking scarification, and the lesions become black. The subsequent fibrosis leads to areas of white opacification that are inactive. The pathogenesis of ovarian endometriomas is a source of controversy. Although there seems to be a consensus concerning the invagination theory, there is still a contradiction between the implantation theory and the metaplasia theory. We recently showed that the mesothelium covering the ovary can invaginate into the ovarian cortex, pushing back the primordial follicles. The presence of mesothelial invagination in continuum with endometriotic tissue suggests that metaplastic histogenesis of ovarian endometriotic lesions occurs. Rectovaginal endometriotic nodules must be considered adenomyomas, consisting of smooth muscle with active glandular epithelium and scanty stroma. Immunocytochemical results show poor differentiation and hormonal independence of these lesions and indicate a close relation with their mesodermal müllerian origin. Conclusion(s): Peritoneal, ovarian and rectovaginal endometriotic lesions must be considered as three separate entities with different pathogeneses. [less ▲]

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See detailDietary fibre in dogs diet : comparisons between cellulose, pectin, guar gum, and between two incorporation rates of guar gum
Diez, Marianne ULg; Van Eenaeme, Christian ULg; Hornick, Jean-Luc ULg et al

in Journal of Animal Physiology & Animal Nutrition (1997), 78

Ausgewachsene Beagle-Hunde erhielten eine Kontrolldiaet (I) aus Hackfleisch und Reis oder mit Cellulose (II), Pektin (III) bzw. Guar (IV) angereicherte Diaeten mit einem Anteil von 3.4% in der ... [more ▼]

Ausgewachsene Beagle-Hunde erhielten eine Kontrolldiaet (I) aus Hackfleisch und Reis oder mit Cellulose (II), Pektin (III) bzw. Guar (IV) angereicherte Diaeten mit einem Anteil von 3.4% in der Trockenmasse. Bei Diaet IV tendierte die Magenentleerungsrate zu niedrigeren Werten. Die intestinale Absorption von Xylose wurde durch die Diaeten IV und III nicht beeinflusst, aber durch Diaet II sign. verlangsamt. Die Varianten III und IV fuehrten zu geringeren Trockenmassegehalten im Kot(p less than 0.001). Die zugefuehrten Faserstoffe senkten teilweise die Naehrstoffverdaulichkeit. Die preprandialen Plasmakonzentrationen an Glucose, Insulin, alpha-Amino-N, Harnstoff und Triglyceriden blieben unbeeinflusst. Die Diaet IV bewirkte einen deutlichreduzierten postprandialen Anstieg von alpha-Amino-N (p less than 0.05) und Harnstoff (p less than 0.01) im Plasma sowie geringere Cholesteringehalte bei gefuetterten und nuechternen Tieren (p less than 0.05). Ein weiterer Versuch mit 3.5% bzw. 7% Guaranteil in der Diaet zeigte dosisabhaengige Effekte. [less ▲]

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See detailElectron partitioning between the two branching quinol-oxidizing pathways in Acanthamoeba castellanii mitochondria during steady-state state 3 respiration.
Jarmuszkiewicz, W.; Sluse-Goffart, C.; Hryniewiecka, L. et al

in Journal of Biological Chemistry (1997), 273(17), 10174-10180

Amoeba mitochondria possess a respiratory chain with two quinol-oxidizing pathways: the cytochrome pathway and the cyanide-resistant alternative oxidase pathway. The ADP/O method, based on the non ... [more ▼]

Amoeba mitochondria possess a respiratory chain with two quinol-oxidizing pathways: the cytochrome pathway and the cyanide-resistant alternative oxidase pathway. The ADP/O method, based on the non-phosphorylating property of alternative oxidase, was used to determine contributions of both pathways in overall state 3 respiration in the presence of GMP (an activator of the alternative oxidase in amoeba) and succinate as oxidizable substrate. This method involves pair measurements of ADP/O ratios plus and minus benzohydroxamate (an inhibitor of the alternative oxidase). The requirements of the method are listed and verified. When overall state 3 respiration was decreased by increasing concentrations of n-butyl malonate (a non-penetrating inhibitor of succinate uptake), the quinone reduction level declined. At the same time, the alternative pathway contribution decreased sharply and became negligible when quinone redox state was lower than 50%, whereas the cytochrome pathway contribution first increased and then passed through a maximum at a quinone redox state of 58% and sharply decreased at a lower level of quinone reduction. This study is the first attempt to examine the steady-state kinetics of the two quinol-oxidizing pathways when both are active and to describe electron partitioning between them when the steady-state rate of the quinone-reducing pathway is varied. [less ▲]

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See detailFibres alimentaires chez le chien V. Effets sur le métabolisme glucidique. Application dans le traitement du diabète
Diez, Marianne ULg; Istasse, Louis ULg

in Annales de Médecine Vétérinaire (1997), 141

Some dietary fibres are characterized by hypoglycaemic and hypoinsulinemic effects in humans and in carnivores. At present, these properties are used in the treatment of diabetes mellitus in both species ... [more ▼]

Some dietary fibres are characterized by hypoglycaemic and hypoinsulinemic effects in humans and in carnivores. At present, these properties are used in the treatment of diabetes mellitus in both species. Finally, the dietary treatment of the diabetic dog is presented with a particular emphasis on the use of dietary fibres. [less ▲]

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See detailKlanknabootsingen in strips
Meesters, Gert ULg

in Nederlands van nu (1997), 45(3), 82-83

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See detailFibres alimentaires chez le chien VI. Effets sur le métabolisme lipidique, les sécrétions biliaires et application dans le traitement de l'obésité
Diez, Marianne ULg; Istasse, Louis ULg

in Annales de Médecine Vétérinaire (1997), 141(5), 363-372

Dietary fibres are able to affect lipids profiles in humans. The soluble and partly soluble fibres have mainly been studied in this purpose. Although hyperlipidaemia are known in dogs, there are few ... [more ▼]

Dietary fibres are able to affect lipids profiles in humans. The soluble and partly soluble fibres have mainly been studied in this purpose. Although hyperlipidaemia are known in dogs, there are few studies on the subject. The mechanisms by which fibres are involved are discussed with a particular emphasis on bile secretion. [less ▲]

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See detailA Deletion in the Bovine Myostatin Gene Causes the Double-Muscled Phenotype in Cattle
Grobet, L.; Martin, L. J.; Poncelet, D. et al

in Nature Genetics (1997), 17(1), 71-74

An exceptional muscle development commonly referred to as 'double-muscled' (Fig. 1) has been seen in several cattle breeds and has attracted considerable attention from beef producers. Double-muscled ... [more ▼]

An exceptional muscle development commonly referred to as 'double-muscled' (Fig. 1) has been seen in several cattle breeds and has attracted considerable attention from beef producers. Double-muscled animals are characterized by an increase in muscle mass of about 20%, due to general skeletal-muscle hyperplasia-that is, an increase in the number of muscle fibers rather than in their individual diameter. Although the hereditary nature of the double-muscled condition was recognized early on, the precise mode of inheritance has remained controversial; monogenic (domainant and recessive), oligogenic and polygenic models have been proposed. In the Belgian Blue cattle breed (BBCB), segregation analysis performed both in experimental crosses and in the outbred population suggested an autosomal recessive inheritance. This was confirmed when the muscular hypertrophy (mh) locus was mapped 3.1 cM from microsatellite TGLA44 on the centromeric end of bovine chromosome 2 (ref. 5). We used a positional candidate approach to demonstrate that a mutation in bovine MSTN, which encodes myostatin, a member of the TGF beta superfamily, is responsible for the double-muscled phenotype. We report an 11-bp deletion in the coding sequence for the bioactive carboxy-terminal domain of the protein causing the muscular hypertrophy observed in Belgian Blue cattle. [less ▲]

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See detailSignes cliniques et diagnostic des tumeurs de la cavité nasale chez le chien: une analyse de 81 cas.
Clercx, Cécile ULg; Peeters, Dominique ULg; Gilbert, S. et al

in Annales de Médecine Vétérinaire (1997), 141

The paper describes clinical signs and diagnosis in 81 cases of intranasal tumors n the dog, examined at the Small Animal Clinic of the Faculty of Veterinary Medicine of the University of Liege (1990-1995 ... [more ▼]

The paper describes clinical signs and diagnosis in 81 cases of intranasal tumors n the dog, examined at the Small Animal Clinic of the Faculty of Veterinary Medicine of the University of Liege (1990-1995). Recent diagnostic techniques and therapeutic options are discussed. The most frequently encountered signs included a decreased or absence of unilateral air passage, observed in 78 cases (96%), and hemorrhagic discharge, observed in 65 cases (80%). Histopathology identified 2 benign and 79 malignant tumors, 57 epithelial and 22 mesenchymatous, including 2 lymphomas. In 74 cases, rhinoscopy identified an intranasal neoplastic mass; in the 7 remaining cases, tissular material of undetermined nature was observed, and histology of biospsied material confirmed the neoplastic nature. The time interval between the diagnosis and the death of the animal (spontaneous or by euthanasia) was longer in dogs with an intranasal sarcoma (mean time interval of 7 months) than in dogs with an intranasal carcinoma (mean time interval of 3 months). [less ▲]

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See detailColestasis asociada a ticlopidina
Diaz Fuenzalida, A.; VALDES SOCIN, Hernan Gonzalo ULg; Laudano, O. et al

in Gastroenterologia y Hepatologia (1997), 20(3), 128-30

The case of a 56-years-old male with cholestasis associated with ticlopidine is presented. Cholestasis is an infrequent adverse effect of this drug. The patient was admitted to hospital because of ... [more ▼]

The case of a 56-years-old male with cholestasis associated with ticlopidine is presented. Cholestasis is an infrequent adverse effect of this drug. The patient was admitted to hospital because of jaundice, choluria, and itching of one month of evolution. The patient had taken ticlopidine twice a day for 3 months up to one week prior to admission for peripheral arteriopathy. Biopsy was performed showing acinar cholestasis and portal inflammatory infiltrate compatible with cholestasis due to hypersensitivity. Ticlopidine was discontinued by the patient himself one week prior to admission. The drug was not readministered and the evolution of the clinical and biochemical parameters of cholestasis decreased. The patient was asymptomatic and laboratory data were normal 4 months later. [less ▲]

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See detailNew insights into the metastasis-associated 67 kD laminin receptor.
Menard, S.; Castronovo, Vincenzo ULg; Tagliabue, E. et al

in Journal of Cellular Biochemistry (1997), 67(2), 155-65

The interactions between tumor cells and laminin or other components of the extracellular matrix have been shown to play an important role in tumor invasion and metastasis. These interactions are mediated ... [more ▼]

The interactions between tumor cells and laminin or other components of the extracellular matrix have been shown to play an important role in tumor invasion and metastasis. These interactions are mediated by different cell surface molecules, including the monomeric 67 kD laminin receptor. This molecule appears to be very peculiar since so, far only a full-length gene encoding a 37 kD precursor protein has been isolated and the mechanism by which the precursor reaches the mature form is not understood. Based on clinical data, which clearly demonstrate the importance of the receptor in tumor progression, studies were conducted to define the structure, expression, and function of this laminin receptor as a step toward developing therapeutic strategies that target this molecule. The data suggest that acylation of the precursor is the key mechanism in maturation of the 67 kD form. The function of the membrane receptor is to stabilize the binding of laminin to cell surface integrins, acting as an integrin-accessory molecule, although homology of the gene encoding the receptor precursor with other genes suggests additional functions. Downregulation of the receptor expression on tumor cells might open new therapeutic approaches to decrease tumor aggressiveness. [less ▲]

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See detailGenetic Structure Of A Lima Bean Base Collection Using Allozyme Markers
Maquet, A.; Bi, Iz.; Delvaux, M. et al

in Theoretical & Applied Genetics = Theoretische und Angewandte Genetik (1997), 95(5-6),

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See detailCo-regulation and physical association of the 67-kDa monomeric laminin receptor and the alpha6beta4 integrin.
Ardini, E.; Tagliabue, E.; Magnifico, A. et al

in Journal of Biological Chemistry (1997), 272(4), 2342-5

The interactions between tumor cells and laminin or other components of the extracellular matrix have been shown to play an important role in tumor invasion and metastasis. However, the role of the ... [more ▼]

The interactions between tumor cells and laminin or other components of the extracellular matrix have been shown to play an important role in tumor invasion and metastasis. However, the role of the monomeric 67-kDa laminin receptor (67LR) remains unclear. We analyzed the regulation of 67LR expression under different culture conditions with respect to the expression of other well characterized laminin receptors. In A431 cells treated with laminin for different time periods, the regulation of 67LR expression correlated with expression of the alpha6 integrin subunit but not with the expression of other laminin receptors. Moreover, cytokine treatment resulted in down-modulated expression of the alpha6 integrin subunit and the 67LR. Co-regulation of the expression of the two receptors was further suggested by the observation that specific down-modulation of the alpha6-chain by antisense oligonucleotides was accompanied by a proportional decrease in the cell surface expression of 67LR. Biochemical analyses indicated co-immunoprecipitation of 67LR and the alpha6 subunit with an anti-alpha6 but not an anti-beta1 monoclonal antibody. Co-regulation of 67LR and alpha6 subunit expression, together with the physical association between the two receptors, supports the hypothesis that 67LR is an auxiliary molecule involved in regulating or stabilizing the interaction of laminin with the alpha6beta4 integrin. [less ▲]

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See detailDifferential expression of galectin 3 and galectin 1 in colorectal cancer progression.
Sanjuan, X.; Fernandez, P. L.; Castells, A. et al

in Gastroenterology (1997), 113(6), 1906-15

BACKGROUND & AIMS: Galectins are beta-galactoside-binding proteins possibly involved in tumor progression. The aim of this study was to determine the pattern of galectin 3 and galectin 1 expression and ... [more ▼]

BACKGROUND & AIMS: Galectins are beta-galactoside-binding proteins possibly involved in tumor progression. The aim of this study was to determine the pattern of galectin 3 and galectin 1 expression and involvement in colorectal cancer progression. METHODS: Galectin 3 expression was examined immunohistochemically in 39 samples of normal mucosae, 25 adenomas, 87 carcinomas, and 39 lymph node metastases. Galectin 1 was analyzed in 25 samples of mucosae, 15 adenomas, 25 carcinomas, and 11 metastases. Western blot analysis was also performed. RESULTS: All normal mucosae showed strong nuclear galectin 3 expression, which was down-regulated in the neoplastic progression, because only 60% of adenomas, 48% of carcinomas, and 44% of metastases were strongly positive (P < 0.0001). Cytoplasmic expression was down-regulated in adenomas (16%) but increased again in carcinomas (64%) (P < 0.0001). Galectin 1 expression was mainly detected in stromal cells and correlated with tumor progression from normal mucosae to adenomas and carcinomas (P < 0.0001). CONCLUSIONS: Galectin 3 expression is down-regulated in the initial stages of neoplastic progression, whereas a dissociated cytoplasmic expression increases in later phases of tumor progression. Galectin 1 in colorectal mucosa is predominantly a stromal product whose overexpression is associated with the neoplastic progression of colorectal cancer. [less ▲]

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See detailFoaming properties of a natural cyclic lipoheptapeptide belonging to a special class of amphiphilic molecules
Razafindralambo, Hary ULg; Paquot, Michel ULg; Baniel, A. et al

in Food Hydrocolloids (1997), 11(1), 59-62

The foaming properties of surfactin, a natural cyclic lipoheptapeptide from Bacillus subtilis, were investigated in comparison and in association with those of bovine serum albumin (BSA). An apparatus ... [more ▼]

The foaming properties of surfactin, a natural cyclic lipoheptapeptide from Bacillus subtilis, were investigated in comparison and in association with those of bovine serum albumin (BSA). An apparatus combining bubbling, optical and conductimetric methods was used to study continuously foam formation and stability in terms of the quantity and density of foam. The increase in surfactin concentration from 0.05 to 0.2 mg/ml had little effect on its foaming capacity, measured by the bubbling time to produce the required foam volume, but improved the foam maximum density significantly. Surfactin produced foam with higher maximum density and stability, and forms more regular and smaller bubbles than BSA. In addition, a synergistic effect was observed on the stability of liquid in foam prepared with a mixture of 50:50 surfactin/BSA. The liquid half-life of BSA foam was enhanced up to 40% when surfactin was added to the solution. [less ▲]

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See detailThe spectrum of 67-kD laminin receptor expression in breast carcinoma progression.
Viacava, P.; Naccarato, A. G.; Collecchi, P. et al

in Journal of Pathology (The) (1997), 182(1), 36-44

Laminin is a glycoprotein of the basement membrane (BM), involved in a variety of normal and pathological cellular events including tumour invasion and metastasis. Cells bind laminin through different ... [more ▼]

Laminin is a glycoprotein of the basement membrane (BM), involved in a variety of normal and pathological cellular events including tumour invasion and metastasis. Cells bind laminin through different types of receptor. The 67-kD laminin receptor (67LR) is a cell-surface protein which binds laminin with high affinity. 67LR expression has been shown to increase in neoplastic cells, compared with normal tissues, and 67LR seems to play an important role during the first steps of neoplastic progression. In this study, 67LR expression was analysed during the morphological phases of breast cancer progression from normal tissue to invasive carcinoma. A total of 506 formalin-fixed, paraffin-embedded normal breast structures and lesions were stained by immunohistochemistry usign the MLuC5 monoclonal antibody, which is specific for 67LR. The results show that in normal breast and in any kind of breast lesion, myoepithelial and endothelial cells express 67LR. While 67LR is not seen in the epithelium of normal breast, cysts, adenosis, and benign tumours, it is expressed in the epithelial cells of several hyperplasias and carcinomas in situ, both ductal and lobular, as well as in all invasive carcinomas. The 67LR-positive cell subpopulation expands from hyperplastic lesions to invasive carcinoma, suggesting that 67LR could be related to the induction and progression of breast cancer. [less ▲]

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See detailDetermination of radiative lifetimes of neutral sulphur by time-resolved three-photon VUV laser spectroscopy
Berzinsh, U.; Caiyan, L.; Zerne, R. et al

in Physical Review. A : General Physics (1997), 55

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See detailThe role of bisphosphonates in the treatment of osteoporosis
Reginster, Jean-Yves ULg; Halkin, V.; Gosset, Christiane ULg et al

in Drugs of Today (Barcelona, Spain : 1998) (1997), 33

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See detailExpression of interstitial collagenase (matrix metalloproteinase-1) is related to the activity of human endometriotic lesions
Kokorine, Isabelle; NISOLLE, Michelle ULg; Donnez, Jacques et al

in Fertility and Sterility (1997), 68(2), 246-251

Objective: To determine whether interstitial collagenase (matrix metalloproteinase-1), known to play a pivotal role in the initiation of menstruation, contributes to the pathogenesis of endometriosis ... [more ▼]

Objective: To determine whether interstitial collagenase (matrix metalloproteinase-1), known to play a pivotal role in the initiation of menstruation, contributes to the pathogenesis of endometriosis. Design: Serial sections of peritoneal red and black endometriotic lesions, ovarian endometriotic cysts, and rectovaginal adenomyotic nodules were analyzed by in situ hybridization for the expression of matrix metalloproteinase-1 by silver staining for the integrity of the fibrillar extracellular matrix and by immunolabeling for the abundance of sex steroid receptors. Setting: Academic hospital and research laboratory. Patient(s): Premenopausal women undergoing laparoscopy for endometriosis. Intervention(s): Biopsy of endometriotic lesions, combined with endometrium whenever possible. Main Outcome Measure(s): Expression of matrix metalloproteinase-1 messenger RNA (mRNA). Result(s): Matrix metalloproteinase-1 mRNA was expressed focally in red peritoneal and ovarian endometriosis irrespective of the phase of the menstrual cycle but was not detectable in black peritoneal and rectovaginal lesions. Foci of matrix metalloproteinase-1 expression closely correlated with matrix breakdown and with the absence of P receptors in adjacent epithelial cells. Conclusion(s): Correlation of matrix metalloproteinase-1 expression with activity of endometriotic tissue suggests its involvement in tissue remodeling and bleeding, and possibly in the secondary shedding and reimplantation of endometriotic lesions. [less ▲]

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See detailFungal contamination in barley and Kashin-Beck disease in Tibet
Chasseur, Camille; Suetens, Carl; Nolard, Nicole et al

in Lancet (1997), 350

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See detailLe traitement corticoïde dans les poussées de la maladie de Crohn de l'adulte
Belaiche, Jacques ULg; Louis, Edouard ULg

in Médecine et Hygiène (1997), 55

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See detailLa vaccination contre les hépatites A et B
Delwaide, Jean ULg; Belaiche, Jacques ULg

in Revue Médicale de Liège (1997), 52(10), 639-643

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See detailPresence of pap-, sfa- and afa-related sequences in necrotoxigenic Escherichia coli isolates from cattle : evidence for new variants of the AFA family
Mainil, Jacques ULg; Jacquemin, E.; Hérault, F. et al

in Canadian Journal of Veterinary Research = Revue Canadienne de Recherche Vétérinaire (1997), 61

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See detailLes modes de transmission du virus de l'hépatite C
Delwaide, Jean ULg; Gerard, Christiane ULg; Sondag, Danièle ULg et al

in Revue Médicale de Liège (1997), 52(6), 388-391

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See detailAn introduction to ET-LOTOS for the description of time-sensitive systems
Léonard, Luc; Leduc, Guy ULg

in Computer Networks & ISDN Systems (1997), 29(3), 271-292

Enhanced Timed-LOTOS, called ET-LOTOS, is an extension of LOTOS allowing the modelling of time-sensitive systems (i.e. systems whose behaviour is influenced by the passing of time). It is the basis of the ... [more ▼]

Enhanced Timed-LOTOS, called ET-LOTOS, is an extension of LOTOS allowing the modelling of time-sensitive systems (i.e. systems whose behaviour is influenced by the passing of time). It is the basis of the timed extension of LOTOS currently developed by ISO (1995). The purpose of this paper is to present ET-LOTOS in a tutorial style and show its applicability. The detailed study of the formal semantics is addressed in another paper. A collection of small but realistic, examples illustrates a wide variety of time-sensitive protocol mechanisms. These examples are used to introduce and justify the extensions of our language. Finally, the basics of the formal semantics are given and a comparison is made with other timed formalisms. [less ▲]

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See detailReassembly of functional nucleoli following in situ unraveling by low-ionic-strength treatment of cultured mammalian cells.
Zatsepina, O. V.; Dudnic, O. A.; Chentsov, Y. S. et al

in Experimental Cell Research (1997), 233(1), 155-68

In order to determine the most persistent components of the nucleolus that might serve as "core" nucleolar elements, we studied the reactivity of nucleoli in living mammalian cells subjected to hypotonic ... [more ▼]

In order to determine the most persistent components of the nucleolus that might serve as "core" nucleolar elements, we studied the reactivity of nucleoli in living mammalian cells subjected to hypotonic buffer saline followed by the incubation of the cells in an isotonic medium. To document as precisely as possible the fine structural changes which occurred, the cells were examined by video-enhanced optical microscopy, fluorescence confocal laser scanning microscopy, and electron microscopy combined with cytochemistry. Light microscopic autoradiography was used to demonstrate the transcriptional characteristics of the reassembled nucleoli. It was shown that all the major compartments of the intact nucleolus could be substantially affected by reduction of the osmolarity of the environmental media. The dynamic events of the nucleolar unraveling in low-salt buffers occurred in the following order: dispersion of the nucleolar pars granulosa, disassociation of the fibrillar complexes into discrete fibrillar centers (FCs) and the dense fibrillar component (DFC), and the almost complete unraveling of the DFC and FCs. At the terminal stages of nucleolar dispersion, the nuclear interior was mainly composed of a loose filamentous meshwork, and none of the typically discerned nucleolar constituents was recognized. Nevertheless, when hypotonically treated cells were returned to isotonic conditions, the nucleolar bodies rapidly began to reassemble. Within 1-2 h of cell incubation under isotonicity, the nucleoli not only became clearly visible, but also reconstituted to their initial size, shape, and position within the nucleus. The ultrastructure and functional activity of the reassembled nucleoli were also found to be fully comparable to those of the untreated controls. These data indicate that the architectural composition of the interphase nucleolus is strictly controlled by the cell. As far as could be determined, none of the usual substructures of the intact nucleolus that could be substituted by complete reassembly of the nucleolar bodies in normotonic conditions, including FCs and the DFC, remained clearly preserved in the terminal stage of nucleolar unraveling. We concluded that the integrity of the nucleolus was mainly preserved by the nuclear or nucleolar matrix system rather than by any other nucleolar structural domains. [less ▲]

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See detailBeam-laser measurements and relativistic Hartree-Fock calculations of the lifetimes of the 3d94p levels in Cu II
Pinnington, E. H.; Rieger, G.; Kernahan, J. A. et al

in Canadian Journal of Physics (1997), 75

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See detailDesigning and implementing a GIS in an international context
Pantazis, Dimos N; Cornélis, Bernard ULg

in Transactions in GIS (1997), 1(4), 301-320

International collaborations between private companies, national research laboratories, and universities in the field of GIS have opened up new ways of exchanging knowledge and experiences between ... [more ▼]

International collaborations between private companies, national research laboratories, and universities in the field of GIS have opened up new ways of exchanging knowledge and experiences between different countries. However, when a collaboration involves the actual design and implementation of an operational GIS, rather than simply theoretical or applied research, or the development of specific applications, many problems can arise, sometimes leading either to the partial success or the complete failure of the project. Some of these problems are frequently encountered in all kinds of international collaborations: problems arising from different cultural mentalities, difficulties establishing a single common leadership, difficulties with communication and information exchange, and so on. Problems relating to the specific nature of the GIS are also present, for example the absence of digital geographic data format standards, the absence of metadata standards, the omission to use GIS or IS design methods, etc. This paper focuses on a joint Sino-Belgian project for the design and implementation of an urban geographical information system (UGIS) integrating remote sensing techniques in Hangzhou city, China and examines the general, specific, and international aspects of the problems encountered in an international collaboration. [less ▲]

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See detailIntegrator forwarding : a new recursive nonlinear robust design
Sepulchre, Rodolphe ULg; Jankovic, M.; Kokotovic, Petar V.

in Automatica (1997), 33(5), 979-984

We consider the global stabilization of nonlinear systems in strict feedforward form. We show that these systems, while not feedback linearizable, can be (globally) transformed by feedback and ... [more ▼]

We consider the global stabilization of nonlinear systems in strict feedforward form. We show that these systems, while not feedback linearizable, can be (globally) transformed by feedback and diffeomorphism into a lower-triangular form. The transformation is explicit and recursive. We employ this transformation to design a globally stabilizing controller with optimality properties and an input-to-state stability property with respect to matched uncertainties. [less ▲]

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See detailDensity-functional theory of polar insulators
Gonze, X.; Ghosez, Philippe ULg; Godby, R. W.

in Physical Review Letters (1997), 78(2), 294-297

We examine the density-functional theory of macroscopic insulators, obtained in the large-cluster limit or under periodic boundary conditions. For polar crystals, we find that the two procedures are not ... [more ▼]

We examine the density-functional theory of macroscopic insulators, obtained in the large-cluster limit or under periodic boundary conditions. For polar crystals, we find that the two procedures are not equivalent. In a large-cluster case, the exact exchange-correlation potential acquires a homogeneous ''electric field'' which is absent from the usual local approximations, and the Kohn-Sham electronic system becomes metallic. With periodic boundary conditions, such a field ist forbidden, and the polarization deduced from Kohn-Sham wave functions is incorrect even if the exact functional is used. [less ▲]

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See detailRegolazione della crescité follicolare e luteinica. Ovulazione, corpo luteo e luteolisi. Summa.
Drion, Pierre ULg; Ectors, F. J.; Hanzen, Christian ULg et al

in Riproduzione dei ruminanti (1997), 14(9), 17-25

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See detailGenetic Diversity In Lima Bean (Phaseolus Lunatus L) As Revealed By Rapd Markers
Fofana, B.; Vekemans, X.; Du Jardin, Patrick ULg et al

in Euphytica (1997), 95(2),

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See detailGravitational lensing by damped Ly-alpha absorbers
Smette, Alain; Claeskens, Jean-François ULg; Surdej, Jean ULg

in New Astronomy (1997), 2

Assuming that (i) damped Ly-alpha absorbers (DLAs) arise in present-day-like spiral galaxies which are immersed in isothermal dark matter halos, (ii) that these galaxies obey the Tully-Fisher sigma/sigma ... [more ▼]

Assuming that (i) damped Ly-alpha absorbers (DLAs) arise in present-day-like spiral galaxies which are immersed in isothermal dark matter halos, (ii) that these galaxies obey the Tully-Fisher sigma/sigma_* = (L/L_*)^1/alpha_TF and the Holmberg R_L/R_* = (L/L_*)^alpha_H relations, and (iii) that they follow the Schechter luminosity distribution, we describe how their observed number density (dN/dz), distribution of column density (f(N)) as well as inferred cosmological density of HI (Omega_HI) derived from DLA surveys are affected by gravitational lensing (GL). The `by-pass' effect causes the lines-of-sight (LOSs) towards background QSOs to avoid the central parts of galaxies and reduces their effective cross-section for absorption; the `amplification bias' leads observers to select QSOs whose LOSs preferentially cross galaxies close to their Einstein radius. As a consequence, the determination of the quantities dN/dz, f(N) and Omega_HI from DLA surveys does not only depend on the redshift z and luminosity L of galaxies responsible for the absorbers but also on the column density profile of HI within the galaxies and on the redshift z_q and magnitude b_q of the background QSOs. For most of the existing surveys using b_q <~ 19 QSOs, the amplification bias dominates the combined effect resulting in a slight overestimate of dN/dz, f(N) and Omega_HI. We mainly find that observational strategies presently used to produce high-z DLA surveys result in avoiding the signature of significant GL effects: following our model, we determine that an overestimate of Omega_HI by more than 10% is unlikely for the z > 1.7 existing surveys, but may reach ~= 35% for the low redshift ones. However, we show that, in the absence of extinction by dust and micro-lensing effects, surveys ideally designed to enhance GL effects, i.e. to search for DLAs at z ~ 0.5 in front of very bright (b_q ~= 16), high-z (z_q > 1) QSOs, may lead 1) to overestimate by up to ~= 90% the number of DLAs per unit redshift; 2) to bias the survey towards high HI column density systems so that it could contain up to 4 times as many such systems, thus 3) to overestimate by up to ~= 170% the cosmological density of gas associated with those DLAs. Identification of the galaxies responsible for the DLAs may be severely biased towards luminous galaxies if 2/alpha_TF - alpha_H>0 this latter effect is greatly increased for log N_HI > 21 DLAs. Hence, GL effects on the quantities derived from surveys for z ~ 0.5 DLAs are of the same order, but of opposite direction, as the effects of extinction by dust (cf. Fall & Pei, 1993). However, the GL and dust extinction effects do not compensate each other: combining them in a consistent way is necessary to interpret existing DLA surveys. Furthermore, the effects due to micro-lensing should be simultaneously taken into account. We intend to report the results on the complex interplay between macro-lensing, micro-lensing and dust in a subsequent paper. We briefly present statistical tests specifically designed to check whether GL affects existing DLA surveys, and assuming that extinction by dust is negligible. We only find indications of GL effects for the z < 1 ones which, if confirmed, might even be stronger than predicted by our model. We show that an independent work on the same subject by Bartelmann & Loeb (1996) incorrectly treats the inclination effects for the intervening galaxies, thus undermining some of their main results and conclusions. [less ▲]

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See detailEngraissement du taurillon Blanc-Bleu belge
Minet, Vincent; Van Eenaeme, Christian ULg; Raskin, Pascale et al

in Agricontact (1997), 291

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See detailFin du Millénaire - fin de l'Agriculture
Schirmer, Jacek; Schmitz, Serge ULg

in Bulletin de la Société Géographique de Liège (1997), 33

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See detailThe state of stress near the Mendocino triple Junction from inversion of earthquake focal mechanism
Schwartz, S. Y.; Hubert, Aurelia ULg

in Geophysical Research Letters (1997), 23

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See detailPirlindole: a selective reversible inhibitor of monoamine oxidase A. A review of its preclinical properties.
Bruhwyler, J.; Liégeois, Jean-François ULg; Geczy, J.

in Pharmacological Research (1997), 36(1), 23-33

Pirlindole is a tetracyclic compound that has been characterized as a potential antidepressant drug. It has pharmacological characteristics in common with both tricyclic antidepressants and classical ... [more ▼]

Pirlindole is a tetracyclic compound that has been characterized as a potential antidepressant drug. It has pharmacological characteristics in common with both tricyclic antidepressants and classical irreversible monoamine oxidase inhibitors. Its main mechanism of action consists of a selective and reversible inhibition of monoamine oxidase A. Secondarily, it exerts an inhibitory effect on noradrenaline and 5-hydroxytryptamine reuptakes. It has no effect on the dopaminergic and cholinergic systems. It has only a low potential for amplifying tyramine and noradrenaline pressor effect, which makes one expect that it will not be at the basis of a 'cheese effect'. Pirlindole has an absolute bioavailability of between 20 and 30% due to an extensive first-pass effect. Orally, the Tmax varies between 2.5 and 6 h in the rat and 0.8 and 2 h in the dog. Two phases of elimination (7.5 and 34-70 h) are measured in the rat and three phases in the dog (1.3, 10.8 and 185 h); it is extensively metabolized. The rat eliminates mainly unconjugated products while the dog eliminates mostly conjugated products. Acute and chronic toxicological studies have not revealed potentially dangerous effects of the drug at the usual doses. It does not present measurable mutagenic, clastogenic or carcinogenic properties. Thus, pirlindole shows pharmacological, pharmacokinetic and toxicological properties which make it suitable for the management of depression. [less ▲]

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See detailPlasma pregnancy-associated glycoprotein and progesterone concentrations in pregnant Assaff ewes carrying single and twin lambs
Ranilla, Marie-José; Sulon, Joseph ULg; Mantecón, A. R. et al

in Small Ruminant Research (1997), 24(2), 125-131

Ovine pregnancy-associated glycoprotein (oPAG) and progesterone (P4) concentrations were monitored weekly during the last three months of gestation and the first month postpartum in plasma of twelve Assaf ... [more ▼]

Ovine pregnancy-associated glycoprotein (oPAG) and progesterone (P4) concentrations were monitored weekly during the last three months of gestation and the first month postpartum in plasma of twelve Assaf ewes. The oPAG levels were determined with a heterologous RIA using bovine PAG as standard and tracer and rabbit antiserum against oPAG. The P4 levels were measured with a radioimmunological procedure with a sensitivity to less than 0.1 ng/ml. The oPAG profiles in ewes carrying a single lamb and in those carrying twins were very similar from week 9 of gestation to lambing. Ewes which had twins presented numerically higher oPAG concentrations from week 12 to lambing, but that difference was only significant (p<0.05) at week 21. Ewes carrying twins presented higher (P<0.05) P4 concentrations from weeks 12 to 20 of gestation than those carrying a single lamb, but afterwards there was no difference. No correlation was found between P4 and oPAG concentrations at each stage of gestation studied in any group. After lambing, P4 levels dropped rapidly in one week, whereas oPAG decreased in four weeks to basal values in both groups of ewes. No relationship (P>0.05) was found between oPAG concentrations and lamb birth-weight at any week of gestation considered in this study. However, the lamb birth-weight was positively correlated (P<0.10) with the P4 concentrations from weeks 9 to 19 of gestation. Results indicate that number of fetuses could influence the oPAG production in ewes during the last three months of gestation. [less ▲]

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