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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 detailQuelques arthropodes de nos maisons
Loneux, Michèle ULg

in Cahiers d'Ethologie (1997), 17(1), 75-124

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See detailLoss of type IV collagen alpha 5 and alpha 6 chains in human invasive prostate carcinomas
Dehan, Pierre ULg; Waltregny, David ULg; Beschin, Alain et al

in American Journal of Pathology (1997), 151(4), 1097-104

Type IV collagen, a major component of basement membranes, is organized in a network responsible for the mechanical resistance of the basement membranes. It also plays a key role in epithelial cell ... [more ▼]

Type IV collagen, a major component of basement membranes, is organized in a network responsible for the mechanical resistance of the basement membranes. It also plays a key role in epithelial cell adhesion to basement membranes. This study was designed to investigate the distribution of type IV collagen alpha-chains in normal, preneoplastic, and malignant prostate basement membranes. For this purpose, immunohistochemistry using specific antibodies raised against the different alpha-chains of type IV collagen was performed in eight normal samples, six prostatic intraepithelial neoplasia, and 20 malignant lesions of the prostate. Our results demonstrate the presence of the "novel" alpha 5 (IV) and alpha 6 (IV) chains along with the "classical" alpha 1 (IV)/alpha 2 (IV) chains in the basement membrane of the normal prostate gland. The alpha 3 (IV) chain was never detected in any prostate specimen. Prostatic intraepithelial neoplasia showed a similar immunostaining pattern to that found in normal glands. In cancer gland basement membranes, we demonstrate for the first time a specific loss of the alpha 5 (IV) and alpha 6 (IV) chains, whereas the classical alpha 1 (IV) and alpha 2 (IV) chains were consistently exhibited. Additionally, type VII collagen colocalized with alpha 5 (IV) collagen chain, and these two proteins, which were always observed in normal and prostatic intraepithelial neoplasia gland basement membranes, were lost in invasive carcinoma basement membranes. This observation raises questions about the possible association or cooperation between alpha 5 (IV)/alpha 6 (IV) chains and anchoring fibrils in prostate glands basement membrane. [less ▲]

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See detailMéthodes de stereologie et de morphometrie appliquées a l'etude des poumons
Jolly, S.; Gabriel, Annick ULg; Desmecht, Daniel ULg et al

in Annales de Médecine Vétérinaire (1997), 141

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See detailCompte rendu de L.C. Youtie, P. Michigan 17. The Michigan Medical Codex (P. Mich. 758 = P. Mich. inv. 21), Atlanta, 1996 (American Studies in Papyrology, 35)
Marganne, Marie-Hélène ULg

in Chronique d'Egypte : Bulletin Périodique de la Fondation Egyptologique Reine Elisabeth (1997), 72

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See detailEvaluation of some parameters influencing the drug delivery from a dry powder inhalation device using an in vitro model of the horse airways
Duvivier, Dominique Hannia; Chiap, Patrice ULg; Crommen, Jacques ULg et al

in Veterinary Research (1997), 28(6), 557-564

The aim of this study was to determine the effect of breathing pattern, air humidity and position of the device on the delivery of an aerosol generated by a dry powder inhalation (DPI) device (Inhalator M ... [more ▼]

The aim of this study was to determine the effect of breathing pattern, air humidity and position of the device on the delivery of an aerosol generated by a dry powder inhalation (DPI) device (Inhalator M). The in vitro inhalation study was performed using the cascade impaction method (Andersen Sampler) adapted to imitate nasal breathing. The amount of ipratropium found in the device, the artificial upper airways and the six stages of the Andersen Sampler was measured using high precision liquid chromatography. Stage 1 of the Andersen Sampler was considered to be the respirable fraction and stages 2 to 6 to be the non-respirable fraction. It was concluded that the theoretical respirable fraction of ipratropium obtained after DPI through Inhalator M was influenced by relative air humidity, air flow and the position of the device, whereas the number of successive inspirations and the duration of inspiration did not affect this fraction of the drug. [less ▲]

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See detailComment j'explore ... Une maladie de Basedow: de la clinique classique au diagnostic radio-immunologique.
Scheen, André ULg

in Revue Médicale de Liège (1997), 52(12), 788-91

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See detailLa violence dans les stades de football
Comeron, Manuel ULg

in Revue Générale (1997), (2), 21-30

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See detailLe cas clinique du mois, A propos d'un cas de myelinolyse centropontique chez un éthylique chronique
Lebrun, F.; Lambermont, Bernard ULg; Ghuysen, Alexandre ULg et al

in Revue Médicale de Liège (1997), 52(1), 7-11

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See detailCompactly supported wavelets in Sobolev spaces of integer order
Bastin, Françoise ULg; Laubin, P.

in Applied & Computational Harmonic Analysis (1997), 4(1), 51-57

We present a construction of regular compactly supported wavelets in any Sobolev space of integer order. It is based on the existence and suitable estimates of filters defined from polynomial equations ... [more ▼]

We present a construction of regular compactly supported wavelets in any Sobolev space of integer order. It is based on the existence and suitable estimates of filters defined from polynomial equations. We give an implicit study of these filters and use the results obtained to construct scaling functions leading to multiresolution analysis and wavelets. Their regularity increases linearly with the length of their supports as in the L(2) case. One technical problem is to prove that the intersection of the scaling spaces is reduced to 0. This is solved using sharp estimates of Littlewood-Paley type. (C) 1997 Academic Press, Inc. [less ▲]

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See detailA method to correct the shape of pressure waves obtained from pulmonary fluid-filled catheters
LAMBERMONT, Bernard ULg; GERARD, P; DETRY, Olivier ULg et al

in American Journal of Respiratory & Critical Care Medicine (1997), 2

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See detailMise au point d'une technique de culture in vitro d'embryons immatures de Phaseolus.
Mergeai, Guy ULg; Schmit, V.; Baudoin, Jean-Pierre ULg et al

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

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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 detailGREES recommendations for the Registration of new drugs in the prevention and treatment of osteoporosis
Reginster, Jean-Yves ULg; Compston, J

in Calcified Tissue International (1997), 60

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See detailLa maladie de Buerger: aspects cliniques et pronostiques
VAN DAMME, Hendrik ULg; Deprez, E.; DEFRAIGNE, Jean ULg et al

in Revue Médicale de Liège (1997), 52(10), 675-82

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See detailUne chambre noire pour l’analyse textuelle
Tilkin, Françoise ULg; Mathonet, Anne

in Espace pour un humanisme européen (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 detailLe concept de qualité de vie
Etienne, Anne-Marie ULg; Fontaine, Ovide ULg

in Revue Francophone de Clinique Comportementale et Cognitive (1997), II(3), 16-25

Les auteurs examinent les problèmes rencontrés pour définir et mesurer la qualité de vie. Il se dégage des multiples définitions un ensemble de propriétés et de caractéristiques telles que la ... [more ▼]

Les auteurs examinent les problèmes rencontrés pour définir et mesurer la qualité de vie. Il se dégage des multiples définitions un ensemble de propriétés et de caractéristiques telles que la multifactorialité, l'auto-évaluation, la variabilité temporelle et la subjectivité. De plus, l'étude comparative des multiples outils existants devrait permettre d'affiner leur spécificité et donc aider à la compréhension du concept... [less ▲]

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See detailProduction and activation of matrix metalloprotease-9 (MMP-9) by HL-60 promyelocytic leukemia cells
Devy, L.; Noël, Agnès ULg; Baramova, E. et al

in Biochemical and Biophysical Research Communications (1997), 238

Human promyelocytic HL-60 cells have been used as a model of acute leukemia to investigate the expression and the regulation of matrix metalloproteases (MMPs), known to contribute to the degradation of ... [more ▼]

Human promyelocytic HL-60 cells have been used as a model of acute leukemia to investigate the expression and the regulation of matrix metalloproteases (MMPs), known to contribute to the degradation of extracellular matrix components. As shown by gelatin zymography, HL-60 cells constitutively released significant amounts of proMMP-9 (92 kDa) and moderate amounts of proMMP-2 (72 kDa). Furthermore, casein zymography confirmed the presence of serine proteases in the form of pro-urokinase. Activation of proMMP-9 was dependent on the plasminogen activator/plasmin (PA/plasmin) system and was inhibited by aprotinin. MMP-9 was only detected in cellular extracts or conditioned media incubated with HL-60 cells, indicating that cells are essential to the activation process. Addition of plasminogen increased by 3-fold the basal invasive rate of these cells across a matrigel layer (2.1%versus0.7% in control cells after 4 h of incubation). Taken together, these results indicate that HL-60 cells exhibit an autocrine activation mechanism of proMMP-9 via the PA/plasmin system and that activation of proMMP-9 increases their invasive potential [less ▲]

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See detailClostridium perfringens urease genes are plasmid-borne.
Dupuy, B.; Daube, Georges ULg; Popoff, M. R. et al

in Infection and Immunity (1997), 65

Although many bacteria are ureolytic, and in some cases urease acts as a virulence factor, the urease phenotype has not been analyzed in the anaerobic pathogen Clostridium perfringens. In this study, ;2 ... [more ▼]

Although many bacteria are ureolytic, and in some cases urease acts as a virulence factor, the urease phenotype has not been analyzed in the anaerobic pathogen Clostridium perfringens. In this study, ;2% of C. perfringens strains, representing the principal biotypes, were found to harbor the urease structural genes, ureABC, and these were localized on large plasmids that often encode, in addition, the lethal « or i toxins or the enterotoxin. This represents the first report of a plasmid-encoded urease in a gram-positive bacterium. The C. perfringens enzyme was highly similar to the ureases of other bacteria and cross-reacted with antibodies raised against the urease purified from Helicobacter pylori. Urease production was inhibited by urea and induced under growth conditions where the availability of nitrogen sources was limiting. To date, this form of regulation has been observed only for chromosomal ureABC genes. [less ▲]

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See detailDe l’acyclovir au valacyclovir: la biodisponibilité en plus de l’efficacité et de la tolérance
Rentier, Bernard ULg

in Virologics (1997), (Septembre), 10-11

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See detailReversibility of thiamine deficiency-induced partial necrosis and mitochondrial uncoupling by addition of thiamine to neuroblastoma cell suspensions.
Bettendorff, Lucien ULg; Goessens, Guy ULg; Sluse, Francis ULg

in Molecular and Cellular Biochemistry (1997), 174(1-2), 121-4

Culture of neuroblastoma cells in the presence of low thiamine concentration (16 nM) and of the transport inhibitor amprolium leads to the appearance of signs of necrosis: the chromatin condenses, the ... [more ▼]

Culture of neuroblastoma cells in the presence of low thiamine concentration (16 nM) and of the transport inhibitor amprolium leads to the appearance of signs of necrosis: the chromatin condenses, the oxygen consumption decreases and is uncoupled, the mitochondrial cristae are disorganized, the thiamine diphosphate-dependent dehydrogenase activities are impaired. When 10 microM thiamine are added to these cells, the basal respiration increases, the coupled respiration is restored and mitochondrial morphology is recovered within 1 h. Addition of succinate, which is oxidized via a thiamine diphosphate-independent dehydrogenase, to digitonin-permeabilized cells immediately restores a coupled respiration. Our results suggest that the slowing of the citric acid cycle is the cause of the biochemical lesion induced by severe thiamine deficiency and that part of the mitochondria remain functional. [less ▲]

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See detailStudies on the O-J-I-P transient of chlorophyll fluorescence in relation to photosystem II assembly and heterogeneity in plastids of greening barley
Barthelemy, X.; Popovic, R.; Franck, Fabrice ULg

in Journal of Photochemistry and Photobiology B : Biology (1997), 39(3), 213-218

The polyphasic variable fluorescence in saturating light (O-J-I-P transient, Strasser et al. (1995) Photochem. Photobiol. 61: 21-42) has been investigated in etiochloroplasts during the greening of ... [more ▼]

The polyphasic variable fluorescence in saturating light (O-J-I-P transient, Strasser et al. (1995) Photochem. Photobiol. 61: 21-42) has been investigated in etiochloroplasts during the greening of etiolated leaves of Hordeum vulgare. The initial photochemical phase (O-J) due to reduction of the primary quinone acceptor Q(A) was found to represent a constant proportion (65-70%) of total variable fluorescence independent of greening time. The partial fluorescence quenching in the Q(A)-reduced state seems, therefore, to represent a basic property of PSII electron transport. The biphasic character of the slower J-I-P transient due to reduction of the plastoquinone pool developed progressively during the first hours of greening. in the same period of lime the proportion and rate constant of rapid PSII alpha sub-population increased, as calculated from the induction curve in the presence of DCMU. Etiochloroplasts or chloroplasts resuspended in low salt medium showed a low I level, which was restored upon readdition of 5 mM MgCl2 and NaCl. Salts also increased the apparent proportion of PSII alpha. These results suggest that the J-I and I-P phases of the induction curve are related to different rates of plastoquinone photoreduction by two distinct PSII populations. The effects of DMQ and of DCBQ on the O-J-I-P transient were also studied in (etio-)chloroplasts, In addition to the already reported quenching of the initial (F-0) and variable fluorescence by DCBQ, a slow fluorescence increase phase was found to appear upon the addition of DCBQ but not of DMQ. The latter observations confirm that DCBQ differs from DMQ by its higher efficiency as PSII electron acceptor. (C) 1997 Elsevier Science S.A. [less ▲]

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See detailA novel virus blinding assay using confocal microscopy: demonstration that the intracellular and extracellular vaccinia virions bind to different cellular receptors
Vanderplasschen, Alain ULg; Smith, G. L.

in Journal of Virology (1997), 71

Vaccinia virus (VV) produces two antigenically and structurally distinct infectious virions, intracellular mature virus (IMV) and extracellular enveloped virus (EEV), which bind to unidentified and ... [more ▼]

Vaccinia virus (VV) produces two antigenically and structurally distinct infectious virions, intracellular mature virus (IMV) and extracellular enveloped virus (EEV), which bind to unidentified and possibly different cellular receptors. Studies of VV binding have been hampered by having two infectious virions and by the rupture of the EEV outer membrane in the majority of EEV virions during purification. To overcome these problems, we have developed a novel approach to study VV binding that is based on confocal microscopy and does not require EEV purification. In this assay, individual virus particles adsorbed to the cell are simultaneously distinguished and quantified by double immunofluorescence labelling with antibody markers for EEV and IMV. By this method, we show unequivocally that IMV and EEV bind to different cellular receptors. Three independent observations allow this conclusion. First, the efficiencies with which IMV and EEV bind to different cell lines are unrelated; second, cell surface digestion with some enzymes affects IMV and EEV binding differently; and third, the binding of a monoclonal antibody to cells prevents IMV binding but not EEV binding. This technique may be widely applicable for studying the binding of different viruses. [less ▲]

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See detailPolarization dependence of the exchange energy
Gonze, X.; Ghosez, Philippe ULg; Godby, R. W.

in Physical Review Letters (1997), 78(10), 2029-2029

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See detailLe visage de l'Autre ou la conscience du regard
Mélon, Marc-Emmanuel ULg

in Revue belge du cinéma (1997), 41

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See detailFibres alimentaires chez le chien : influence de l'incorporation de pulpes de betterave ou de chicorée sur la digestibilité des nutriments et les concentrations plasmatiques de plusieurs métabolites
Diez, Marianne ULg; Hornick, Jean-Luc ULg; Van Eenaeme, Christian ULg et al

in Revue de Médecine Vétérinaire (1997), 148

Cette étude relate les effets de la distribution de deux rations enrichies en pulpes de betterave ou de chicorée (7 p.100 ADF dans la matière sèche) en comparaison à une ration témoin sur les paramètres ... [more ▼]

Cette étude relate les effets de la distribution de deux rations enrichies en pulpes de betterave ou de chicorée (7 p.100 ADF dans la matière sèche) en comparaison à une ration témoin sur les paramètres fécaux, la digestibilité des principaux nutriments et plusieurs paramètres biochimiques (glucose, insuline, azote alpha-aminé, urée, cholestérol et triglycérides) mesurés à jeun ou pendant six heures après le repas chez huit chiens adultes en bonne santé. Les régimes enrichis en pulpes ont entraîné une augmentation significative de l'excrétion fécale totale, de l'excrétion de MS dans les matières fécales, une diminution de la teneur en MS des fèces ainsi qu'une diminution des coefficients de digestibilité des principaux nutriments. Le régime contenant la pulpe de betterave a entraîné une diminution de la glycémie à jeun, de l'insulinémie et des concentrations en triglycérides postprandiales, des concentrations en urée et en cholestérol mesurées avant et après le repas. Le régime contenant la pulpe de chicorée a provoqué une diminution de l'insulinémie postprandiale, des concentrations en urée et en cholestérol à jeun et après le repas. Ces deux types de pulpes, semblables par leur composition, induisent les mêmes types d'effets sur les paramètres fécaux et la digestibilité des nutriments, mais les effets systémiques sont plus importants lors de la distribution de pulpes de betterave. [less ▲]

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See detailMolecular adaptations of enzymes from psychrophilic organisms
Feller, Georges ULg; Arpigny, J. L.; Narinx, E. et al

in Comparative Biochemistry and Physiology. A : Comparative Physiology (1997), 118(3), 495-499

The dominating adaptative character of enzymes from cold-evolving organisms is their high turnover number (k(cat)) and catalytic efficiency (k(cat)/K-m), which compensate for the reduction of chemical ... [more ▼]

The dominating adaptative character of enzymes from cold-evolving organisms is their high turnover number (k(cat)) and catalytic efficiency (k(cat)/K-m), which compensate for the reduction of chemical reaction rates inherent to low temperatures. This optimization of the catalytic parameters can originate from the highly flexible structure of these proteins providing enhanced abilities to undergo conformational changes during catalysis at low temperatures. Molecular modelling of the 3-D structure of cold-adapted enzymes reveals that only subtle modifications of their conformation can be related to the structural flexibility. The observed structural features include: 1) the reduction of the number of weak interactions involved in the folded state stability like salt bridges, weakly polar interactions between aromatic side chains, hydrogen bonding, arginine content and charge-dipole interactions in alpha-helices; 2) a lower hydrophobicity of the hydrophobic clusters forming the core of the protein; 3) deletion or substitution of proline residues in loops or turns connecting secondary structures; 4) improved solvent interactions with a hydrophilic surface via additional charged side chains; 5) the occurence of glycine clusters close to functional domains; and 6) a looser coordination of Ca2+ ions. No general rule from the molecular changes observed; rather, each enzyme adopts its own strategy by using one or a combination of these altered interactions. Enzymes from thermophiles reinforce the same type of interactions indicating that there is a continuity in the strategy of protein adaptation to temperature. (C) 1997 Elsevier Science Inc. [less ▲]

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See detailFunctional heterogeneity of human CD34(+) cells isolated in subcompartments of the G0 /G1 phase of the cell cycle.
GOTHOT, André ULg; Pyatt, R.; McMahel, J. et al

in Blood (1997), 90(11), 4384-93

Using simultaneous Hoechst 33342 (Hst) and Pyronin Y (PY) staining for determination of DNA and RNA content, respectively, human CD34(+) cells were isolated in subcompartments of the G0 /G1 phase of the ... [more ▼]

Using simultaneous Hoechst 33342 (Hst) and Pyronin Y (PY) staining for determination of DNA and RNA content, respectively, human CD34(+) cells were isolated in subcompartments of the G0 /G1 phase of the cell cycle by flow cytometric cell sorting. In both bone marrow (BM) and mobilized peripheral blood (MPB) CD34(+) cells, primitive long-term hematopoietic culture-initiating cell (LTHC-IC) activity was higher in CD34(+) cells isolated in G0 (G0CD34(+) cells) than in those residing in G1 (G1CD34(+) cells). However, as MPB CD34(+) cells displayed a more homogeneous cell-cycle status within the G0 /G1 phase and a relative absence of cells in late G1 , DNA/RNA fractionation was less effective in segregating LTHC-IC in MPB than in BM. BM CD34(+) cells belonging to four subcompartments of increasing RNA content within the G0 /G1 phase were evaluated in functional assays. The persistence of CD34 expression in suspension culture was inversely correlated with the initial RNA content of test cells. Multipotential progenitors were present in G0 or early G1 subcompartments, while lineage-restricted granulomonocytic progenitors were more abundant in late G1 . In vitro hematopoiesis was maintained for up to 6 weeks with G0CD34(+) cells, whereas production of clonogenic progenitors was more limited in cultures initiated with G1CD34(+) cells. To test the hypothesis that primitive LTHC-ICs would reenter a state of relative quiescence after in vitro division, BM CD34(+) cells proliferating in ex vivo cultures were identified from their quiescent counterparts by a relative loss of membrane intercalating dye PKH2, and were further fractionated with Hst and PY. The same functional hierarchy was documented within the PKH2(dim) population whereby LTHC-IC frequency was higher for CD34(+) cells reselected in G0 after in vitro division than for CD34(+) cells reisolated in G1 or in S/G2 + M. However, the highest LTHC-IC frequency was found in quiescent PKH2(bright) CD34(+) cells. Together, these results support the concept that cells with distinct hematopoietic capabilities follow different pathways during the G0 /G1 phase of the cell cycle both in vivo and during ex vivo culture. [less ▲]

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See detailNon délivrance et infécondité: intérêts de l’étiproston et du dosage de la PAGI (pregnancy-associated glycoprotein I) au cours du postpartum chez la vache.
Zaiem, I.; Tainturier, D.; Ben Othmen, H. et al

in Revue de Médecine Vétérinaire (1997), 148(8-9), 725-732

Sixty Prim'holstein cows with retained placenta for more than 24 hours after parturition, were shared in three groups of 20 cows each. All cows were delivred manually 24 to 36 hours post partum and ... [more ▼]

Sixty Prim'holstein cows with retained placenta for more than 24 hours after parturition, were shared in three groups of 20 cows each. All cows were delivred manually 24 to 36 hours post partum and received local treatment with 1 g of oxytetracyclin. Cows in group 1 received two intra-muscular injections of 5 mg etiproston on day of manual delivery (D1) and 15 days after (D15). Cows on group II received only one etiproston administration (D1), and cows in group III remained untreated. Ratios of delayed uterine involution were respectively 20, 40 and 55 % in groupsI,II and III(I<0.05;II<0.005). PAGI concentrations were checked 15 days after parturition and were significantly higher in cows affected by delayed uterine involution (p < 0.05). V-IAF intervals were significantly (p < 0.05) different between groups I (58 days), II (102 days) and III(143 days). [less ▲]

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See detailLe bois de tension. 1 Définition et distribution dans l'arbre.
Jourez, Benoît ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1997), 1(2), 100-112

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See detailDevelopment of a positron emission tomography radiopharmaceutical for imaging thymidine kinase gene expression : Synthesis and in vitro evaluation of 9-{3-[18F] Fluoro-1-hydroxy-2-propoxymethyl guanine
Monclus, Michel; Luxen, André ULg; Cool, Vincent et al

in Bioorganic and Medicinal Chemistry Letters (1997), 7(14), 1879-1882

9-[(3-fluoro-1-hydroxy-2-propoxy)methyl]guanine (FHPG) 2 has been labeled with fluorine-18 and evaluated in vitro as a potential radiotracer for mapping gene expression in vivo with positron emission ... [more ▼]

9-[(3-fluoro-1-hydroxy-2-propoxy)methyl]guanine (FHPG) 2 has been labeled with fluorine-18 and evaluated in vitro as a potential radiotracer for mapping gene expression in vivo with positron emission tomography (PET). [less ▲]

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See detailFatty acid hydroperoxides pathway in plants. A review
Fauconnier, Marie-Laure ULg; Marlier, M.

in Grasas y Aceites (1997), 48(1), 30-37

The present paper focusses on the fatty acid hydroperoxides pathways, mainly hydroperoxide lyase and hydroperoxide dehydrase. For each enzyme, the definition, occurrence and subcellular localization is ... [more ▼]

The present paper focusses on the fatty acid hydroperoxides pathways, mainly hydroperoxide lyase and hydroperoxide dehydrase. For each enzyme, the definition, occurrence and subcellular localization is presented. Particular attention is given to reaction mecanisms and to substrate specificity. Physiological roles of reaction products are also discussed. [less ▲]

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See detailUne étude du style de vie de jeunes dans l’Union Européenne. Qu’en conclure et quels enseignements en tirer?
Piéron, Maurice; Ledent, Maryse; Delfosse, Catherine et al

in Sport (1997), 159/160

La littérature internationale continue à rassembler des indices en nombre croissant montrant l'étroite relation entre l'état de santé et la condition physique. Toutefois, une évolution très nette se ... [more ▼]

La littérature internationale continue à rassembler des indices en nombre croissant montrant l'étroite relation entre l'état de santé et la condition physique. Toutefois, une évolution très nette se marque dans l'identification des déterminants importants. La condition physique apparaît comme un produit très transitoire qui se détériore à partir du moment où l'on cesse de l'entretenir. ... [less ▲]

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See detailTotal cholesterol levels during adolescence: results of a Belgian MONICA population
Paulus, D.; Saint-Remy, Annie ULg; Rorive, Georges ULg et al

in Acta Cardiologica (1997), 52(2), 182-183

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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 detailUsing the Global Positioning System to monitor active faults in “stable continental Europe”
Warnant, René ULg

in Aardkundige Mededelingen (1997), 8

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See detailEfficiency and productivity of the insurance industry in the OECD countries
Fecher-Bourgeois, Fabienne ULg; Donni, Olivier

in Geneva Papers on Risk & Insurance - Issues & Practice (1997), 22(No. 85, October 1997), 523-535

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See detailAnomalously large Born effective charges in cubic WO3
Detraux, F.; Ghosez, Philippe ULg; Gonze, X.

in Physical Review. B : Condensed Matter (1997), 56(3), 983-985

Within density-functional theory, we compute the Born effective charges of tungsten trioxyde in its reference cubic phase (defect-perovskite structure). For the tungsten atom, the effective charge tensor ... [more ▼]

Within density-functional theory, we compute the Born effective charges of tungsten trioxyde in its reference cubic phase (defect-perovskite structure). For the tungsten atom, the effective charge tensor is isotropic, with Z(W)*=+12.51. For the oxygen atoms, the two independent components of the tensor, corresponding, respectively, to a displacement of the atom parallel or perpendicular to the W-O bond, have the values Z(O parallel to)* = -9.13 and Z(O perpendicular to)* = -1.68. Z(W)* and Z(O parallel to)* are anomalously large with respect to the nominal ionic charges (+6 on W and -2 on O), but compatible with the Born effective charges found in related ABO(3)-perovskite compounds. [less ▲]

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See detailMesures d'incitation en faveur de la conservation de la diversite genetique en matiere agricole. 2. Analyse des mesures agri-environnementales belges.
Lepoivre, Philippe ULg; Baltus, Carine

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1997), 1(3), 187-195

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See detailA cinnabar local order in liquid II-VI compounds
Raty, Jean-Yves ULg; Gaspard, Jean-Pierre ULg; Ceolin, R. et al

in Physica B: Condensed Matter (1997)

A short wavelength (lambda=0.7 Aring) neutron scattering experiment has been performed on the II-VI compounds HgS, HgSe and Zn xHg 1-xTe. Liquid HgS can be viewed as a distortion of the blende structure ... [more ▼]

A short wavelength (lambda=0.7 Aring) neutron scattering experiment has been performed on the II-VI compounds HgS, HgSe and Zn xHg 1-xTe. Liquid HgS can be viewed as a distortion of the blende structure; we show that this distortion decreases gradually with temperature. For Zn xHg 1-xTe, we show that the transition between the six coordinated HgTe liquid and the four coordinated ZnTe liquid is not continuous, the intermediate phase being a deformed cinnabar one [less ▲]

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See detailBovine herpesvirus type 4. In Lymphotropicherpesviruses: Epstein-Barr virus and Human herpesvirus 8
Thiry, Etienne ULg; Lomonte, P.; Vanderplasschen, Alain ULg et al

in International Agency for research on cancer (1997)

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See detailIncorporation of rapeseed meal extracted by pressure in a diet for growing fattening bulls .1. Intake, digestibility and fermentation in the rumen
Mayombo, A. P.; Baldwin, Paule ULg; Wathelet, Jean-Paul ULg et al

in Annales de Zootechnie (1997), 46(1), 57-70

Intake, digestibility, degradation kinetic and fermentation were studied with bulls offered fattening diets with four different incorporation rates of rapeseed meal obtained by pressure; the ether extract ... [more ▼]

Intake, digestibility, degradation kinetic and fermentation were studied with bulls offered fattening diets with four different incorporation rates of rapeseed meal obtained by pressure; the ether extract content was 8.6% and the glucosinolate content 17,6 mu molg. The control diet was made of sugar beet pulp, cereals, soya bean meal and linseed meal. In the three other diets, nitrogen from rapeseed meal provided 33, 66 or 100% of nitrogen from soya bean meal or linseed meal. The intakes of the control diet were 94.3 +/- 7.3 g/kg metabolic body weight. Intakes were maintained high in the diet with 33, 66 or 100% of protein from rapeseed meal at 93.5 +/- 7.7; 93.0 +/- 5.0 and 93.5 +/- 7.7 g/kg, respectively. The apparent digestibility of rapeseed meal in the ration containing only rapeseed meal was high at 74.9 +/- 1.9% for dry matter, 76.5 +/- 2.1% for organic matter, 69.9 +/- 3.9% for nitrogen, 59.1 +/- 4.8% for ADF and 74.6 +/- 6.9% for ether extract. Dry matter of rapeseed meal was less degradable (57.8 +/- 5.0%) than that of soya bean meal (65.5 +/- 2.6%) or of linseed meal (61.6 +/- 4.2%) but was not as well protected than that of protected soya bean meal (43.6 +/- 2.6%) (P < 0.001). Similar trends were observed for the degradability of nitrogen (P < 0.001). Ether extract of rapeseed meal was more degradable than that of linseed meal (P < 0.001). There were no significant effects of the incorporation rate of rapeseed meal on the pH in the rumen. The fermentations were mainly of the acetate type with usual concentrations of propionate, butyrate, total volatile fatty acids, glucose or alpha amino nitrogen. Ammonia concentration was higher with the control diet and lower with the diet with 100% of protein from rapeseed meal. Fatty acids of rapeseed meal were more protected against saturation by the rumen microorganisms than in linseed meal. [less ▲]

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See detailTrois ivoires médiévaux au Musée de l’Oeuvre Notre-Dame à Strasbourg
Van den Bossche, Benoît ULg

in Cahiers Alsaciens d’Archéologie, d’Art et d’Histoire (1997), XL

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See detailPEGASE, une méthodologie et un outil de simulation prévisionnelle pour la gestion de la qualité des eaux de surface
Smitz, Joseph ULg; Everbecq, Etienne ULg; Deliège, Jean-François ULg et al

in Tribune de l'Eau (La) (1997), 50/4(588), 73-82

PEGASE (Planification Et Gestion de l’ASsainissement des Eaux) est un modèle intégré bassins hydrographiques/rivières développé à l’Aquapôle qui permet de calculer de façon déterministe et prévisionnelle ... [more ▼]

PEGASE (Planification Et Gestion de l’ASsainissement des Eaux) est un modèle intégré bassins hydrographiques/rivières développé à l’Aquapôle qui permet de calculer de façon déterministe et prévisionnelle la qualité des eaux des rivières en fonction des rejets et apports de pollution. PEGASE est un outil opérationnel permettant d’orienter les choix des opérateurs publics et privés en matière de gestion des eaux de surface à l’échelle des bassins versants [less ▲]

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See detailTrajectoire déviante à la lisière entre adolescence et âge adulte
Gavray, Claire ULg

in Déviance et Société (1997), 21(3), 273-288

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See detailDopamine 'D2-like' receptor agonists in combination with cocaine: absence of interactive effects on locomotor activity.
Tirelli, Ezio ULg; Reggers, Jean ULg; Terry, P.

in Behavioural Pharmacology (1997), 8(2-3), 147-59

This study examined interactions between cocaine and drugs that act as direct agonists at subtypes of "D2-like" dopamine receptors. The drugs 7-OH-DPAT, quinpirole and RU24213 were studied alone and in ... [more ▼]

This study examined interactions between cocaine and drugs that act as direct agonists at subtypes of "D2-like" dopamine receptors. The drugs 7-OH-DPAT, quinpirole and RU24213 were studied alone and in combination with cocaine for their effects on locomotor activity in non-habituated mice. Locomotor activity was measured by photobeam crossings over 140 min. At the doses given (7-OH-DPAT: 0.006-6.4 mg/kg; quinpirole: 0.001-1 mg/kg; RU24213: 0.008-8 mg/kg) all three direct agonists dose-dependently reduced locomotor activity throughout the test, whereas cocaine (0.6-20 mg/kg) produced dose-related hyperactivity. Next, for each direct agonist, a series of doses was selected (up to threshold behaviourally-active doses) as pretreatments to a sub-maximally stimulant dose of cocaine (15 mg/kg). 7-OH-DPAT and quinpirole did not modulate the effects of cocaine; RU24213 produced, at best, a very modest attenuation of the effects of cocaine. Finally, a series of cocaine doses (below stimulant threshold) was given before a single dose of each direct agonist (the lowest dose to reduce activity significantly). Cocaine did not reliably alter the hypoactivity produced by any of the D2-like agonists. By demonstrating negligible interactions between cocaine and D2-like agonists, the results fail to demonstrate any necessary involvement of D2-like receptors in one of the behavioural effects of cocaine. [less ▲]

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See detailLes lipoxygénases du soja.
Fauconnier, Marie-Laure ULg; Marlier, M.

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1997), 1(2), 125-141

Dans cet article de synthèse, les auteurs font le point sur les connaissances actuelles dans le domaine des lioxygénases du soja. Une attention particulière est portée à la compréhension des mécanismes ... [more ▼]

Dans cet article de synthèse, les auteurs font le point sur les connaissances actuelles dans le domaine des lioxygénases du soja. Une attention particulière est portée à la compréhension des mécanismes réactionnels (substrats, inhibiteurs, site actif, etc.). Le rôle physiologique ainsi que l'utilisation de cet enzuyme dans les industries agroalimentaires et en biotechnologie sont également abordés. [less ▲]

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See detailComparison of results of carotid artery surgery after either direct closure or use of a vein patch.
Desiron, Quentin ULg; Detry, Olivier ULg; Van Damme, Hendrik ULg et al

in Cardiovascular Surgery (1997), 5(3), 295-303

In order to assess the benefit of vein patching versus direct closure after carotid endarterectomy, a series of 2271 carotid operations were analysed retrospectively. Apart from 114 procedures consisting ... [more ▼]

In order to assess the benefit of vein patching versus direct closure after carotid endarterectomy, a series of 2271 carotid operations were analysed retrospectively. Apart from 114 procedures consisting of saphenous vein bypass (n = 29) and eversion endarterectomy (n = 85), 2157 open endarterectomies were performed. They were closed either directly (n = 837) or using a vein patch (n = 1320). The combined mortality-major neurological morbidity rate was 1.7%, i.e. 1% mortality (0.2% neurological) and 0.7% permanent neurological morbidity (0.5% ipsilateral to the operated artery). Early symptomatic internal carotid thrombosis was documented in six cases (four following direct closure and two after vein patching). A total of 827 carotid arteries were followed up by duplex scanning on an annual basis (244 direct closure and 583 vein patching). The mean follow-up was 44 months; 69 months for direct closure and 35 months for vein patching. In direct closure, there were 21 stenoses (9%) and 10 occult thromboses (4%); in vein patching carotids, there were 17 stenoses (3%), nine thromboses (1.8%) [corrected] and six pseudoaneurysms (1%). Annual incidence of poor results was 2.4% in direct closure, and 0.87% in vein patching. The only other factor responsible for a significant difference was gender (3.4% in women versus 2.1% in men). In this retrospective study, vein patching appears to be beneficial for the prevention of acute postoperative thrombosis and late stenosis or thrombosis. [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 Revue Médicale de Liège (1997), 52(6), 388-391

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See detailMechanisms of Hand Motor Recovery After Stroke: An Electrophysiologic Study of Central Motor Pathways
Bastings, Eric; Rapisarda, Giuseppe; Pennisi, Giovanni et al

in Journal of Neurologic Rehabilitation (1997), 11(2), 97-108

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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 detailFeeding of the sparid fish Sarpa salpa in a seagrass ecosystem: Diet and carbon flux
Havelange, S.; Lepoint, Gilles ULg; Dauby, Patrick ULg et al

in Marine Ecology (1997), 18(4), 289-297

In Revellata Bay (Gulf of Calvi, Corsica, France), the sparid fish Sarpa salpa L. is the main macro-consumer of Posidonia oceanica (L.) DELILE leaf. Stomach contents were analysed and C-13/C-12 isotopic ... [more ▼]

In Revellata Bay (Gulf of Calvi, Corsica, France), the sparid fish Sarpa salpa L. is the main macro-consumer of Posidonia oceanica (L.) DELILE leaf. Stomach contents were analysed and C-13/C-12 isotopic ratios were measured in fish muscle and potential food sources (algae, P. oceanica leaf and its epiphytes) to determine their relative contribution to the fish diet. S. salpa has an age-related mixed diet: juveniles are plankton feeders, young, sub-adults and adults are herbivorous, and, the older the individuals, the higher the relative contribution of P. oceanica to the diet. Our results and former studies of carbon stocks and fluxes in the P. oceanica bed of Revellata Bay have enabled an estimation of the general impact of S. salpa grazing on infralittoral communities: the studied species consumes 24 g C.m-2.a(-1) from P. oceanica leaf, 4.8 from epiphytes and 13 from epilithic algae. The fish net production and biomass turnover in that zone have been estimated to be 1.2 g C.m(-2).a(-1) and 1.5 a(-1), respectively. [less ▲]

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See detailMitochondrial Asparaginyl-Trna Synthetase Is Encoded By The Yeast Nuclear Gene Ycr24c
Landrieu, I.; Vandenbol, Micheline ULg; Hartlein, M. et al

in European Journal of Biochemistry (1997), 243(1-2),

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See detailLarga existencia y breve desaparición: el adiós de una revista cultural.
Vanden Berghe, Kristine ULg

in América. Cahiers du CRICCAL (1997), 18(II), 587-600

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See detailCompte rendu de L.I. Conrad - M. Neve - V. Nutton - R. Porter - A. Wear, The Western Medical Tradition: 800 BC to AD 1800, Cambridge, 1995
Marganne, Marie-Hélène ULg

in Archives Internationales d'Histoire des Sciences (1997), 47(139 bis), 153-154

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See detailAbdominal sequelae after pedicled TRAM flap breast reconstruction
PETIT, JY; RIETJENS, M; FERREIRA, M et al

in Plastic and Reconstructive Surgery (1997), 99

A considerable interest in autologous tissue breast reconstructions has developed recently, especially since Food and Drug Administration (FDA) experts have raised the polemic on silicone implants ... [more ▼]

A considerable interest in autologous tissue breast reconstructions has developed recently, especially since Food and Drug Administration (FDA) experts have raised the polemic on silicone implants. Although such enthusiasm for the transverse rectus abdominis musculocutaneous (TRAM) flap is justified in what concerns the final cosmetic result of the reconstructed breast, the risk of abdominal sequelae should be explained to the patient. Abdominal scarring, parietal weakness, strength loss, and back pain have been recorded in a series of pedicled TRAM flap reconstructions performed at the Institut Gustave-Roussy before 1991. Cosmetic results of the abdomen were tested by three independent judges on the photographs taken of 132 patients. The global appearance of the abdomen was rated as "natural" in 70 percent of the patients. The umbilical scar was unacceptable in 25 percent and very good or not visible in 21 percent. The lower abdominal scar was rated as "not acceptable" in 35 percent. Abdominal strength was tested among the 38 patients who underwent both preoperative and postoperative muscular testing, of whom 18 had single-pedicled and 20 had bipedicled TRAM flap reconstructions. In the first group, the physiotherapist observed an impairment of function of the upper portion of the rectus abdominis and of the oblique muscle in almost 50 percent. In the second group, the same muscles were more severely impaired (in 60 percent), as well as the function of the lower portion of the rectus (in 15 percent). The percentage of patients complaining of "light back pain" in the 6-month postoperative period was 55 percent in the single-pedicle group and 30 percent in the double-pedicle group. However, 20 percent of the bipedicled patients complained of "severe" back pain, while there was none in the single-pedicled group. In conclusion, abdominal sequelae after TRAM flap breast reconstruction should not be underestimated and constitute one of the drawbacks of the technique when it is compared with reconstruction with a prosthesis. [less ▲]

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See detailPemphigus foliacé dans l'espèce équine : synthèse et description de 2 cas.
Amory, Hélène ULg; Beco, Luc; Desmecht, Daniel ULg et al

in Annales de Médecine Vétérinaire (1997), 141

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See detailA domain of TEL conserved in a subset of ETS proteins defines a specific oligomerization interface essential to the mitogenic properties of the TEL-PDGFR beta oncoprotein.
Jousset, C.; Carron, C.; Boureux, A. et al

in EMBO Journal (1997)

TEL is a novel member of the ETS family of transcriptional regulators which is frequently involved in human leukemias as the result of specific chromosomal translocations. This study shows that the amino ... [more ▼]

TEL is a novel member of the ETS family of transcriptional regulators which is frequently involved in human leukemias as the result of specific chromosomal translocations. This study shows that the amino-terminal domain conserved in a subset of the ETS proteins has evolved to generate a specialized protein-protein interaction interface which is likely to be an important determinant of their specificity as transcriptional regulators. [less ▲]

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See detailCombined Ring Inversion and Side Group Rotation in Geminal Diphosphoryl Substituted Pyrrolinoxyl Radicals: ESR Analysis of Chemical Exchange between Four Nonequivalent Sites
Rockenbauer, Antal; Mercier, Anne; Le Moigne, François et al

in Journal of Physical Chemistry A (1997), 101(43), 7965-7970

The ESR spectra of three diphosphorylated pyrrolidinoxyl radicals have been studied over a large temperature range. While for the trans 2,5-disubstituted compound 1 no line width alternation was found ... [more ▼]

The ESR spectra of three diphosphorylated pyrrolidinoxyl radicals have been studied over a large temperature range. While for the trans 2,5-disubstituted compound 1 no line width alternation was found, for the 2,2-disubstituted compounds 2 and 3, dramatic changes in the spectra were observed as a function of the temperature. These changes were explained by a four-site chemical exchange model including both ring inversion and hindered rotation around the carbon-phosphorus bonds. For radical 3, the presence of additional 5,5-dimethyl substitution can completely block rotations around carbon-phosphorus bonds for certain ring geometries, while for other ring conformations chemical exchange still occurs through combined inversionrotation processes. An effective two-site model composed of nonequivalent sites and a superposition model composed of a pair of exchanging conformers and a pair of nonexchanging conformers were used to simulate spectrum variations. A satisfactory fit was obtained over the entire temperature range investigated. From the temperature dependence of the exchange frequencies the potential barriers for ring inversion (27 kJ/mol), for combined inversion-rotation (11 kJ/mol), and for rotation around the carbon-phosphorus bonds (14 kJ/mol) were estimated. [less ▲]

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See detailPrimary radiation therapy or surgery combined or not to radiation therapy in the management of squamous cell carcinoma of the penis
Zouhair, Abderrahim; Ozsahin, Mahmut; Douglas, Pelham et al

in International Journal of Radiation, Oncology, Biology, Physics (1997), 39(2 (Supplément)), 295

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See detailGlucose turnover in humans in the basal state and after intravenous glucose: a comparison of two models.
Overkamp, D.; Gautier, J. F.; Renn, W. et al

in American Journal of Physiology (1997), 273(2 Pt 1), 284-96

This study investigated the ability of two models to represent glucose kinetics in the basal steady state and during an intravenous glucose tolerance test (IVGTT). Six young nonobese male subjects were ... [more ▼]

This study investigated the ability of two models to represent glucose kinetics in the basal steady state and during an intravenous glucose tolerance test (IVGTT). Six young nonobese male subjects were studied after an overnight fast. Two bolus injections of [U-13C]glucose were given 150 min apart, the first without and the second together with concomitant injection of unlabeled glucose. [3-3H]glucose was constantly infused throughout the study and served to provide an independent means for evaluation of system responses. A linear time-invariant three-compartmental model and the two-compartment time-variant model proposed by Caumo and Cobelli were used to interpret measured time courses of [U-13C]glucose and to reconstruct endogenous glucose production and glucose removal. The ability of the two models to describe the glucose tracer time course was comparable. Simulation studies showed that the two-compartmental time-variant system better predicted measured [3-3H]glucose concentration profiles than did the three-compartmental time-invariant model. However, endogenous glucose production and the integral of excess glucose removal over basal during the IVGTT derived from the two models were almost identical. [less ▲]

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See detailFontes Graeci Sami, I. Η Σάμος στις πηγές από τον 8ο ως τον 6ο αι.
Vanhaegendoren, Koen ULg; Karla, Grammatiki

in Samiakes Meletēs (1997), 3

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See detailInvolvement of different transduction pathways in NF-kappaB activation by several inducers
Legrand-Poels, Sylvie ULg; Zecchinon, Laurent; Piret, Bernard et al

in Free Radical Research (1997)

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See detailNote sous Cassation, 7 mai 1996
Orban, Lionel ULg

in Actualités du Droit (1997)

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See detailThe lowest 5g-6h supermultiplet of Fe II
Biémont, Emile ULg; Johansson, S.; Palmeri, P.

in Physica Scripta (1997), 55

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See detailGlobal adaptive stabilization of cascade nonlinear systems
Jankovic, M.; Sepulchre, Rodolphe ULg; Kokotovic, Petar V.

in Automatica (1997), 33(2), 263-368

An adaptive controller is developed for a class of nonlinear systems for which other approaches (e.g. backstepping) may fail to be applicable. The new design employs feedback passivation and an explicit ... [more ▼]

An adaptive controller is developed for a class of nonlinear systems for which other approaches (e.g. backstepping) may fail to be applicable. The new design employs feedback passivation and an explicit construction of a Lyapunov function for the zero dynamics with respect to a relative degree 1 output. As an illustration a longstanding "nonlinear benchmark problem" is solved. [less ▲]

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See detailL'art et le corps
Duchesne, Jean-Patrick ULg

in Art&fact (1997), 16

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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 application of spatial autocorrelation methods to the study of Calluna vulgaris population genetics
Mahy, Grégory ULg; Néve, Gabriel

in Belgian Journal of Botany (1997), 129

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See detailBeam-laser measurements and relativistic Hartree-Fock calculations of the lifetimes of the 4d95p levels in Ag II
Biémont, Emile ULg; Pinnington, E. H.; Kernahan, J. A. et al

in Journal of Physics : B Atomic Molecular & Optical Physics (1997), 30

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See detailEtude histologique de lésions subcliniques de la lèvre latérale du talus chez le cheval
Yousfi, S.; Gabriel, Annick ULg; Maroit, V. et al

in Annales de Médecine Vétérinaire (1997), 141

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See detailThe Burden of Hypopituitarism in Adults after Pituitary Surgery
Van Roijen, L.; Beckers, Albert ULg; Stevenaert, Achille ULg et al

in Journal of Clinical Endocrinology and Metabolism (1997), 4(Suppl. B), 139-142

The burden of illness was assessed in 183 hypopituitary patients, with growth hormone deficiency, who had received pituitary surgery at the Centre Hospitalier Universitaire de Liège, Belgium. The Short ... [more ▼]

The burden of illness was assessed in 183 hypopituitary patients, with growth hormone deficiency, who had received pituitary surgery at the Centre Hospitalier Universitaire de Liège, Belgium. The Short-Form 36 (SF-36) was used to assess health status, and the Health and Labour Questionnaire was used to obtain data on production loss and reduced labout performance. Data on medical consumption were also collected. The overall response rate was 72 %. Hypopituitary patients reported a lower health status than that of the mean population in all but two dimensions of the SF-36 (bodily pain and physical functioning). A relativelu high percentage of hypopituitary patients reported being incapacitated for paid employment, and those in paid employment reported higher absence rates compared with reference data. However, while at work there was no indication that hypopituitary patients perform less well due to health problems than the average population. Healthcare costs for hypopituitary patients who had undergone pituitary surgery were higher than for the reference population. [less ▲]

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See detailImage du mois. Syncope vasovagale en direct.
Scheen, André ULg; Marchand, Monique ULg; Juchmes, J.

in Revue Médicale de Liège (1997), 52(5), 315

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See detailLack Of Mutation In The Waf1/Cip1 Gene During Bovine Leukemia Virus-Induced Leukemogenesis
Dequiedt, Franck ULg; Willems, Luc ULg; Kerkhofs, P. et al

in Veterinary Immunology and Immunopathology (1997), 59(3-4),

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See detailQuantitative ultrasound techniques for the assessment of osteoporosis : Expert agreement on current status
Glüer, CC; Reginster, Jean-Yves ULg

in Journal of Bone and Mineral Research (1997), 12(8), 1280-1288

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See detailLa tracabilite des viandes.
Portetelle, Daniel ULg; Renaville, Robert ULg

in Annales de Gembloux (1997), 103(1-2),

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See detailSurveys of ultraviolet-excess quasar candidates in large fields
Gosset, Eric ULg; Moreau, O.; Surdej, Jean ULg et al

in Astronomy and Astrophysics. Supplement Series (1997), 123

We describe the results of a survey for moderately bright quasars performed in a 20.6-square-degree field around the galaxy NGC 450. The quasar candidates were selected on the basis of their ultraviolet ... [more ▼]

We describe the results of a survey for moderately bright quasars performed in a 20.6-square-degree field around the galaxy NGC 450. The quasar candidates were selected on the basis of their ultraviolet excess: by comparative visual inspection of the double image of each single object on a U/B dual-exposure Schmidt photographic plate, 95 primary and 45 secondary quasar candidates were selected on the basis of their $U$ image being too bright. The spectroscopic identification of the primary candidates led to the discovery of 59 bona fide quasars (out of which 6 were previously known). The Palomar Schmidt plate was digitised using the MAMA measuring machine and the outcoming data reduced using ad hoc procedures. A photometric calibration allowed us to derive values for the limiting magnitudes and for the U-B index selection threshold of the survey. A catalogue containing 60 quasars is presented with accurate positions, magnitudes and additional information such as redshifts. We studied the spatial distribution of the objects and detected, for the quasars of our sample, a significant deviation from randomness in the form of a propensity to cluster in pairs on the celestial sphere with a typical scale of about 10 arcmin. We also formally detected a tendency towards a 3-D clustering, but this result is induced by a single pair of quasars. A forthcoming paper will deal with a similar work performed in a field around NGC 520; the latter field is located directly to the North of the present one and slightly overlaps it. Based on observations acquired at the Mount Palomar and Las Campanas Observatories as well as at the European Southern Observatory. Also based on Schmidt-plate digitisations performed with the MAMA measuring machine of C.A.I. (I.N.S.U., Paris). [less ▲]

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See detailSoil Solution Nitrogen and Cations Influenced by (NH4)2SO4 Deposition in a Coniferous Forest
Carnol, Monique ULg; Ineson, Phil; Dickinson, A. L.

in Environmental Pollution (1997), 97(1-2), 1-10

The effects of chronically enhanced (NH(4))(2)SO(4) deposition on ion concentrations in soil solution and ionic fluxes were investigated in a Picea abies plot at Grizedale forest, NW England. Soil cores ... [more ▼]

The effects of chronically enhanced (NH(4))(2)SO(4) deposition on ion concentrations in soil solution and ionic fluxes were investigated in a Picea abies plot at Grizedale forest, NW England. Soil cores closed at the base and containing a ceramic suction cup sampler were 'roofed' and watered every 2 weeks with bulk throughfall collected in the field. Treatments consisted of the inclusion of living roots from mature trees in the lysimeters and increasing (NH(4))(2)SO(4) deposition (NS treatment) to ambient + 75 kg N ha(-1) a(-1). Rainfall, throughfall and soil solutions were collected every 2 weeks during 18 months, and analysed for major cations and anions. NO(3)(-) fluxes significantly increased following NS treatment, and were balanced by increased Al(3+) losses. Increased SO(4)(2-) concentrations played a minor role in controlling soil solution cation concentrations. The soil exchange complex was dominated by Al and, during the experimental period, cores of all treatments 'switched' from Ca(2+) to Al(3+) leaching, leading to mean [Formula: see text] molar ratios in soil solution of NS treated cores of 0.24. The experiment confirmed that the most sensitive soils to acidification (through deposition or changing environmental conditions) are those with low base saturation, and with a pH in the lower Ca, or Al buffer ranges. [less ▲]

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See detailIn vivo behavior of poly(D,L)-lactide microspheres designed for chemoembolization
Flandroy, P.; Grandfils, Christian ULg; Danen, B. et al

in Journal of Controlled Release (1997), 44(2-3), 153-170

Although chemoembolization advantageously combines arterial embolization of the vascular supply of a neoplasm with controlled intra-arterial infusion of chemotherapeutic drug(s), its application is ... [more ▼]

Although chemoembolization advantageously combines arterial embolization of the vascular supply of a neoplasm with controlled intra-arterial infusion of chemotherapeutic drug(s), its application is limited by the lack of appropriate and reliable embolization materials. Recently, calibrated microspheres of poly(D,L)-lactide have proved to be promising in embolization. Nevertheless, repetitive chemoembolization requires the availability of microspheres degradable within a few days. For this purpose, microspheres consisting of a blend of two polyesters of a very different molecular weight (Mn =65 000 and 3500 in a 16:84 wt. ratio) have been prepared and injected in the renal arteries of rabbits. The in vivo fate of these two component microspheres has been compared by radiology and histology to microspheres prepared from the high molecular weight poly(D,L)-lactide. Furthermore, the in vivo degradation of the polymer has been measured by size exclusion chromatography after quantitative reextraction from the embolized kidney. Degradation kinetics has been compared to data previously reported in vitro. According to the observations performed during the in vivo study, the 50/50 microspheres appear more useful for the chemoembolization of tumors. [less ▲]

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See detailMolecular dissection of the insulin-like growth factor axis in the human thymus
Geenen, Vincent ULg; Kecha, Ouafae; Achour, Imane et al

in Diabetologia (1997), 40

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See detailBiomechanical assessment of the transversalis fascia and rectus abdominis aponeurosis in inguinal herniation - Preliminary results
PANS, Alain ULg; Pierard, Gérald ULg; Albert, Adelin ULg et al

in Hernia : the Journal of Hernias & Abdominal Wall Surgery (1997), 1

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See detailExtensive Ulcerative Colitis and Extraintestinal Manifestations in a Patient with Hiv Infection and Significant Cd4 T-Cell Lymphopenia
Louis, Edouard ULg; Moutschen, Michel ULg; de Marneffe, Pierre et al

in Gastroentérologie Clinique et Biologique (1997), 21(11), 884-7

We report a heterosexual patient with HIV infection and a CD4 T-cell count of 0.45 x 10(9)/L who developed mild ulcerative proctitis, sacroileitis and oligoarthiritis. While he was treated with 5 ... [more ▼]

We report a heterosexual patient with HIV infection and a CD4 T-cell count of 0.45 x 10(9)/L who developed mild ulcerative proctitis, sacroileitis and oligoarthiritis. While he was treated with 5-aminosalicylic enemas, the patient rapidly developed severe pancolitis. An emergency colectomy without procetectomy was performed. A few months later, he suffered recurrence of ulcerative proctitis, aggravation of arthritic pain and developed anterior uveitis. All symptoms disappeared after proctectomy. There was no evidence for opportunistic infection or Kaposi's sarcoma. Antineutrophil cytoplasmic antibodies were positive and the HLA-B27 antigen was present. CD4 counts were lower during the phases of active disease than during remission. This case demonstrates that severe ulcerative colitis can occur in the presence of moderate T-cell defects. In view of a recent report of remission of Crohn's disease under comparable circumstances, it is possible that the extent of T-cell involvement in both diseases is radically different. [less ▲]

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See detailGezonheidszorg : actuele standpunten. Diagnostiek van osteoporose
Devogelaer, JP; Reginster, Jean-Yves ULg; Raeman, F et al

in Tijdschrift voor Geneeskunde (1997), 53(10), 639-645

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See detailRheological characterization of BaTiO3 sol-gel transition
Brasseur, Alain; Michaux, Bernard; Pirard, René ULg et al

in Journal of Sol-Gel Science and Technology (1997), 9(1), 5-15

BaTiO3 gels were prepared by hydrolysis and polycondensation reactions between titanium isopropoxide and barium hydroxide in presence of methoxyethanol, methanol and water. The rheology of the sol-gel ... [more ▼]

BaTiO3 gels were prepared by hydrolysis and polycondensation reactions between titanium isopropoxide and barium hydroxide in presence of methoxyethanol, methanol and water. The rheology of the sol-gel transition was studied with a rheometer allowing low amplitude sinusoidal oscillations. Experimental data show a continuous increase in the complex viscosity along with time, showing the progressive character of the transition. The influence of synthesis operating variables was studied. The gelation time, which definition is based on viscoelastic measurements, increases exponentially when the water content is increased, when the dilution due to the methoxyethanol is reduced or when the temperature is lowered. Different growth models were used for the characterization of the particles in the solution. These models suggest that the polymerisation first produces spherical particles (mass fractals) and that these spherical particles then agglomerate to form a linear network. [less ▲]

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See detailActivation of the transcription factor NF-kappaB in lipopolysaccharide-stimulated U937 cells
Legrand-Poels, Sylvie ULg; Maniglia, Salvator; Boelaert, J. R. et al

in Biochemical Pharmacology (1997)

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See detailEvidence For The Assignment Of Two Strains Of Splv To The Genus Potyvirus Based On Coat Protein And 3' Non-Coding Region Sequence Data
Colinet, Dominique; Kummert, Jean; Lepoivre, Philippe ULg

in Virus Research (1997), 49(1), 91-100

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See detailBounds on the Soft Pomeron Intercept
Cudell, Jean-René ULg; Kang, Kyungsik; Kim, Sung Ku

in Physics Letters B (1997), 395

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See detailIntratumoral heterogeneity for hsp90 mRNA levels in a breast cancer cell line
Luparello, C.; Noël, Agnès ULg; Pucci-Minafra, I.

in DNA & Cell Biology (1997), 16

BC-3A and BC-61 are two breast cancer cell lines that have been cloned from parental 8701-BC cells and exhibit different biosynthetic, proliferative, and invasive properties in vitro. In the attempt to ... [more ▼]

BC-3A and BC-61 are two breast cancer cell lines that have been cloned from parental 8701-BC cells and exhibit different biosynthetic, proliferative, and invasive properties in vitro. In the attempt to search whether alterations in the profiles of gene expression could be detected, we have submitted both cytotypes to identification of differentially expressed cDNAs. In addition, steroid hormone receptor mRNA arrays and in vivo tumorigenesis of the two lines have been checked. The technique used allowed identification of changes in the expression of the 90-kD heat shock protein-beta (hsp90beta) which is prominently down-regulated in BC-61 cells. Because we have also found that these cells, which lack estrogen receptor mRNA synthesis, display a more invasive behavior in vitro and increased tumorigenesis in vivo, we propose that evaluation of hsp903 transcript levels may be taken into consideration for screening as a novel molecular marker of breast cancer progression. [less ▲]

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See detailCompte rendu de Moines et religieux au Moyen Age, éd. BERLIOZ (J.), Paris, 1994
George, Philippe ULg

in Revue Belge de Philologie et d'Histoire (1997)

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See detailFusion Of Bovine Leukemia Virus With Target Cells Monitored By R18 Fluorescence And Pcr Assays
Zarkik, S.; Defrisequertain, F.; Portetelle, Daniel ULg et al

in Journal of Virology (1997), 71(1),

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See detailFloctafenin versus acetaminophen for pain control in patients with osteoarthritis in the lower limbs
Lequesne, M; Fannius, J; Reginster, Jean-Yves ULg et al

in Revue du Rhumatisme (English ed.) (1997), 64(5), 327-333

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See detailHemodynamic effects of increasing PEEP during mechanical ventilation in anesthetized patients
LAMBERMONT, Bernard ULg; Ghuysen, Alexandre ULg; D'Orio, Vincenzo ULg et al

in American Journal of Respiratory & Critical Care Medicine (1997), 2

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