References of "1997"
     in
Bookmark and Share    
Peer Reviewed
See detailIsokinetic testing of knee musculature in patient with unilateral gonarthrosis
Henrotin, Yves ULg; Croisier, Jean-Louis ULg; Dumont, R. et al

in Revue du Rhumatisme (English ed.) (1997, November), 11

Detailed reference viewed: 22 (3 ULg)
Full Text
Peer Reviewed
See detailTriblock copolymer based thermoplastic elastomeric gels of a large service temperature range :preparation and characterization
Yu, Jian Ming; Jérôme, Robert ULg; Overbergh, Noël et al

in Macromolecular Chemistry and Physics (1997), 198(11), 3719-3735

Poly(methyl methacrylate)-block-polybutadiene-block-poly(methyl methacrylate) (MBM) triblock copolymers and their hydrogenated counterparts with poly(ethylene-co-1,2-butylene) midblock (MEBM) were swollen ... [more ▼]

Poly(methyl methacrylate)-block-polybutadiene-block-poly(methyl methacrylate) (MBM) triblock copolymers and their hydrogenated counterparts with poly(ethylene-co-1,2-butylene) midblock (MEBM) were swollen by an aliphatic oil of high boiling point which is a selective solvent for the central block. Thermoreversible gels are accordingly formed by both MBM and MEBM copolymers above a critical polymer content (Cr), which depends on the nature of the midblock and not on the copolymer molecular weight, at least in the investigated range. Cr has been found to be 5 wt.-% for an MBM block copolymer and 2 wt.-% for MEBM copolymers of various molecular weights. Gels of MEBM triblock copolymers exhibit interesting mechanical properties, such as high elon-gation at break (up to 870%) and high tensile strength (32 kPa). The most interesting fea-ture of the MEBM gels is an upper service temperature as high as 170°C, thus more than 100°C higher than the value (47°C) reported for gels of an SEBS copolymer (S = polystyrene) of comparable molecular weight (100000) and composition (ca. 30 wt.-% hard block). The morphology of MEBM gels was studied by scanning electron microscopy (SEM) and found to be cocontinuous in case of a gel containing 20 wt.-% copolymer. [less ▲]

Detailed reference viewed: 48 (5 ULg)
See detailLes mutations NEM-1 dans les familles belges
Beckers, Albert ULg

Scientific conference (1997, November)

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailHST confirmation of the lensed quasar J03.13.
Surdej, Jean ULg; Claeskens, Jean-François ULg; Remy, M. et al

in Astronomy and Astrophysics (1997), 327

In order to definitely prove the claim by Claeskens et al. (1996A&A...305L...9C) that J03.13 is a doubly imaged quasar, WFPC2 direct imaging and FOS spectroscopy of this compact system have been obtained ... [more ▼]

In order to definitely prove the claim by Claeskens et al. (1996A&A...305L...9C) that J03.13 is a doubly imaged quasar, WFPC2 direct imaging and FOS spectroscopy of this compact system have been obtained with HST. These textbook case observations clearly show that J03.13 consists of two point-like images separated by 0.849"+/-0.001" with a magnitude difference of 2.14+/-0.03 in V and I. We see no trace of a lensing galaxy. From the FOS observations, we find that J03.13 A and B have identical spectra within the measurement uncertainties. The data also show that spectroscopic contamination of B by A is negligible. We do confirm the redshift z=2.545 for J03.13 A and B (emission-lines due to Ly-beta lambda1025 and O VI lambdalambda1031, 1037 are also detected), first derived from an unresolved ground-based spectrum of the two components by Claeskens et al. We also find that the absorption line system at z=2.344 (CIV and Ly-alpha) is present in the spectra of A and B. On the contrary, the absorption line system at z=1.085 (MgII) is only present in the spectrum of J03.13 A. If this latter system is associated with the lens, we may expect that image A consists of two radially merging images with a very small angular separation. From the WFPC2 imagery, we can rule out the presence of a third component fainter than A by up to 5.2mag. with an angular separation >=0.13". [less ▲]

Detailed reference viewed: 21 (6 ULg)
Peer Reviewed
See detailBoth Pituitary and Placental Growth Hormone Transcripts Are Expressed in Human Peripheral Blood Mononuclear Cells (Pbmc)
Melen-Lamalle, Laurence ULg; Hennen, Georges ULg; Dullaart, R. P. et al

in Clinical & Experimental Immunology (1997), 110(2), 336-40

The hGH-V gene codes for a variant of human pituitary growth hormone (hGH-N) named placental growth hormone (hPGH). hPGH shares 93% amino acid identity with hGH-N. Until now the hGH-V gene was considered ... [more ▼]

The hGH-V gene codes for a variant of human pituitary growth hormone (hGH-N) named placental growth hormone (hPGH). hPGH shares 93% amino acid identity with hGH-N. Until now the hGH-V gene was considered to be exclusively expressed in human placenta, where it replaces maternal circulating hGH-N at the end of pregnancy. In this study we investigated by reverse transcriptase-polymerase chain reaction (RT-PCR) analysis hGH-N, and hGH-V, gene expression in PBMC in men, women and pregnant women. We have demonstrated that hGH-N and hGH-V transcripts are simultaneously produced by PBMC in both men and women as well as pregnant women. The PBMC of a PIT-1-negative woman expressed only the hGH-V transcript, but not the hGH-N one as expected. In conclusion, hGH-V mRNA is expressed by cells other than the syncytiotrophoblast, is not regulated by PIT-1, and may be involved in immune regulation, as is pituitary GH. [less ▲]

Detailed reference viewed: 39 (4 ULg)
Peer Reviewed
See detailThe use of a food frequency questionnaire in an adolescent population.
Paulus, D.; Saint-Remy, Annie ULg; Jeanjean, Marcelle ULg et al

Conference (1997, November)

Detailed reference viewed: 10 (3 ULg)
Full Text
See detailGare aux cercles vicieux…
Durand, Pascal ULg

Article for general public (1997)

Detailed reference viewed: 5 (1 ULg)
See detailAmendements de bassins versants dans les Ardennes belges : effets sur l’eau de percolation et l’eau à l’exutoire
Carnol, Monique ULg

Conference given outside the academic context (1997)

Alors que des essais d’amendements en forêt se sont révélés peu rentables, un nouvel intérêt s’est manifesté pour ce type de traitement dans les années 1980, après les observations de jaunissement et de ... [more ▼]

Alors que des essais d’amendements en forêt se sont révélés peu rentables, un nouvel intérêt s’est manifesté pour ce type de traitement dans les années 1980, après les observations de jaunissement et de chutes d’aiguilles inhabituelles, notamment chez l’épicéa. Les causes de ce ‘nouveau dépérissement forestier’, parmi lesquelles citons, l’acidification des sols, la saturation de l’écosystème en azote et les déséquilibres nutritionnels, sont supposées agir de manière synergique. Les forêts ardennaises n’ont pas été épargnées par ce phénomène, et des symptômes de dépérissement forestier ont été rapportés en 1983 par Weissen (Weissen et al., 1983). Ce dépérissement serait dû à une augmentation de la pollution atmosphérique exacerbant la déficience en magnésium des arbres, qui se développent sur les sols ardennais naturellement pauvres en magnésium (Weissen et al., 1990). L’amendement a donc été conseillé comme mesure de protection et de correction de l’acidification des sols et des déséquilibres nutritionnels chez les arbres. Cependant, des effets secondaires potentiels, en particulier sur l’eau à l’exutoire (nappes et eau potable) et sur la solution du sol (nutrition des arbres) doivent être évalués. Dans cette présentation, je résumerai les résultats d’une étude poursuivie dans 4 bassins versants boisés, en majorité, par l’épicéa commun (Picea abies [L.] Karst.). Les deux couples de bassins versants d’une taille d’environ 80 ha sont situées à la Croix Scaille (commune de Gedinne) et dans l’Hertogenwald (Hautes Fagnes), sur sol brun acide. Un bassin versant de chaque couple a été amendé par 3 T/ha de dolomie ((Ca, Mg)CO3 55/40) et de 200 kg/ha de K2SO4 en 1992 et 1993, respectivement. La pluie à découvert, les pluviolessivats (pluie interceptée par les arbres) et la solution du sol ont été analysés mensuellement, l’eau à l’exutoire toutes les 2 semaines. L’analyse en séries temporelles a été utilisée pour détecter des changements significatifs qui surviendraient dans les concentrations en éléments minéraux dans l’eau à l’exutoire et qui seraient dus à l’amendement. Par ailleurs, les flux entrants et sortants du bassin versant ont été calculés de manière à établir le bilan entrée-sortie des éléments dans la forêt et ainsi pouvoir évaluer les pertes de l’amendement vers le ruisseau. Dans le bassin des Hautes Fagnes, la dissolution de la dolomie a influencé de manière significative les concentrations à l’exutoire. Les concentrations en magnésium ont augmenté immédiatement après l’amendement (Fig. 1), probablement à cause de l’écoulement de l’eau de pluie dans les couches supérieures du sol. Quatre années après le traitement, elles restent toujours supérieures aux concentrations observées avant l’amendement. Néanmoins, les quantités de magnésium perdues à l’exutoire sont faibles par rapport aux doses apportées par l’amendement. Dans les 2 bassins amendés, les concentrations du calcium et des autres cations et anions majeurs de la solution du sol n’ont pas été influencées significativement par le traitement. Les concentrations en magnésium dans la solution du sol ont augmenté immédiatement et un an après l’amendement respectivement à environ 5 et 15 cm de profondeur. Les concentrations en calcium dans la solution du sol ont augmenté 3 ans après l’amendement. Ces résultats indiquent que, pour les sols étudiées et la dose d’amendement apportée, une grande partie de l’amendement est retenue dans les sols, et que, jusqu’à présent, les conséquences pour l’eau à l’exutoire sont peu importantes. En effet, seule la concentration en magnésium a augmenté de manière significative alors qu’aucun changement significatif n’a été détecté, jusqu'à présent, dans les teneurs en nitrates (Fig. 2) et en métaux lourds (Cd, Pb, Zn). On peut donc conclure que, sur base de nos analyses et dans la situation actuelle, l’eau de l’exutoire qui alimente le barrage-réservoir de la Gileppe n’a pas subi de modifications importantes à la suite de l’amendement. Il faut cependant souligner que la dissolution de l’amendement peut être lente dans les sols acides, et que des effets ‘à retardement’ sont possibles. De plus, une étude récente, comparant, « in situ », l’effet d’un amendement sur la solution du sol d’une chênaie et d’une pessière de même âge a montré une augmentation de la concentration en nitrates dans la solution de sol de la chênaie. Il faut donc rester prudent lors de l’extrapolation de ces résultats vers d’autres sites. Figure 1. Influence d’un amendement dolomitique (3 T/ha) sur les concentrations en magnésium à l’exutoire d’un bassin versant. Figure 2. Influence d’un amendement dolomitique (3 T/ha) sur les concentrations en nitrate à l’exutoire d’un bassin versant. Références Weissen, F., Letocart, H. & Van Praag, H.J., Bull. Soc. Roy. Bot. Belg. 2, 1-13 (1983) Weissen, F., Hambuckers, A., Van Praag, H.J. and Remacle, J., Plant Soil 128, 59-66 (1990). [less ▲]

Detailed reference viewed: 48 (1 ULg)
See detailQu'est-ce que le français langue seconde?
Defays, Jean-Marc ULg; Denyer, Monique

Scientific conference (1997, November)

Detailed reference viewed: 33 (9 ULg)
Full Text
Peer Reviewed
See detailEssais variétés : la chasse aux effets de competition !
Claustriaux, Jean-Jacques ULg; David, O.; Monod, H. et al

in Perspectives Agricoles (1997), 229

Detailed reference viewed: 10 (1 ULg)
See detailAlphonse Allais ou la poésie du rire
Defays, Jean-Marc ULg; Dufays, Jean-Louis

Conference given outside the academic context (1997)

Detailed reference viewed: 43 (1 ULg)
Full Text
Peer Reviewed
See detailThéories du texte et apprentissage des langues : les grands axes d'une approche interdisciplinaire
Defays, Jean-Marc ULg

in Travaux de linguistique : revue internationale de linguistique Française (1997), 34

Detailed reference viewed: 16 (1 ULg)
Full Text
Peer Reviewed
See detailClear Cell Sarcoma: An Extremely Rare Cause of Pleural Disease
BURY, Thierry ULg; HERMANS, Gilberte ULg; Alexis-Agnant, R. et al

in European Respiratory Journal (1997), 10(11), 2653-6

We present the case of a 36 yr old woman with a persisting complaints of left chest pain. A chest radiograph revealed multiple left pleural thickenings. Classical exploration was negative. Thoracic ... [more ▼]

We present the case of a 36 yr old woman with a persisting complaints of left chest pain. A chest radiograph revealed multiple left pleural thickenings. Classical exploration was negative. Thoracic surgery allowed the subtotal removal of a huge pleural tumour. The histological examination revealed a clear cell sarcoma. The literature on this extremely rare tumour is reviewed. [less ▲]

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailAnalysis of the Mutations Induced in the E. Coli Lac Z Gene by a Psoralen Analog
Matroule, J. Y.; Collet, M.; Boiteux, S. et al

in Journal of Photochemistry and Photobiology B : Biology (1997), 41(1-2), 36-44

A psoralen in which intracyclic oxygen atoms were replaced by sulfur (7H-thieno [3,2-g]-[1]-[benzothiopyran-7-one) [PSO(S-S)]) was recently synthesized and its photobiological properties were investigated ... [more ▼]

A psoralen in which intracyclic oxygen atoms were replaced by sulfur (7H-thieno [3,2-g]-[1]-[benzothiopyran-7-one) [PSO(S-S)]) was recently synthesized and its photobiological properties were investigated. M13mp19 DNA photosensitization mediated by PSO (S-S) followed by transfection into competent E. coli gave rise to a very low phage progeny showing the high aptitude of this compound to modify DNA. In order to characterize the role of oxidative damages in the photosensitized reaction mediated by PSO(S-S), plasmid bearing the gene encoding the formamidopyrimidine DNA glycosylase (Fpg) under the control of the inducible lac Z promoter was transfected in E. coli. Overexpression of Fpg was induced by addition of isopropyl-beta-D-thio-galactopyranoside (IPTG) to the cells and monitored by western blot analysis. Fpg overexpression did not influence the rate of M13mp19 DNA photoinactivation by PSO(S-S) neither the mutation frequency measured by the expression of beta-galactosidase encoded by the lac Z gene beared by M13mp19. Analysis of the mutation patterns recorded with or without Fpg overexpression showed that several G to T transversions due to oxidative damages were repaired by Fpg. These data show that oxidative DNA damages generated during PSO(S-S) photosensitization have only limited biological implications measured in terms of DNA photoinactivation. [less ▲]

Detailed reference viewed: 9 (3 ULg)
Full Text
Peer Reviewed
See detailIPM in Asia - A review of existing projects in the Philippines and Indonesia
Wynn, Nigel R.; Schiffers, Bruno ULg; Seghers, N. et al

in Agro-Chemicals News in Brief (1997), XX(2), 1-18

Integrated Pest Management means a pest management system that, in the context of the associated environment and the population dynamics of the pest species, utilizes ail suitable techniques and methods ... [more ▼]

Integrated Pest Management means a pest management system that, in the context of the associated environment and the population dynamics of the pest species, utilizes ail suitable techniques and methods in as compatible a manner as possible and maintains the pest populations at levels below those causing economically unacceptable damage or 1055. FAO-Code- of Conduct 1984. [less ▲]

Detailed reference viewed: 21 (5 ULg)
See detailLe transport intermodal en Belgique
Jacob, Damien ULg

in Le rail et la route : le commerce ou la dispute (1997)

Detailed reference viewed: 32 (0 ULg)
Full Text
Peer Reviewed
See detailThe use of a food frequency questionnaire in a adolescent population
Paulus, D.; Saint-Remy, Annie ULg; Jeanjean, Michel et al

in Gaceta Sanitaria (1997, November), 11(suppl 2), 37

Detailed reference viewed: 17 (5 ULg)
Full Text
Peer Reviewed
See detailWhole-body 18FDG positron emission tomography in the staging of non-small cell lung cancer.
Bury, Thierry ULg; Dowlati, A.; Paulus, Patrick et al

in European Respiratory Journal (1997), 10(11), 2529-34

Despite advances in morphological imaging, some patients with lung cancer are found to have nonresectable disease at surgery or die of recurrence within yr of surgery. We performed a prospective study in ... [more ▼]

Despite advances in morphological imaging, some patients with lung cancer are found to have nonresectable disease at surgery or die of recurrence within yr of surgery. We performed a prospective study in 109 patients to compare the accuracy of whole-body positron emission tomography (PET) using fluorine-18 deoxyglucose (18FDG) and conventional imaging (CI) methods for the staging of non-small cell lung cancer (NSCLC). When CI or PET study suggested metastatic disease, confirmation was obtained by biopsy or follow-up information. As compared to CI, 18FDG-PET correctly changed the N stage in 22 patients (33%) and the M stage in 15 patients (14%). For the detection of distant metastases, PET study showed five false-positive sites and no false-negative cases. Currently, the accuracy of PET in the detection of M stage is 96%. Our study shows that visual interpretation of whole-body fluorine-18 deoxyglucose-positron emission tomography images can improve the diagnostic accuracy in the staging of non-small cell lung cancer. Further experience is needed to establish if metabolic imaging would be a cost-effective tool in the future management of lung cancer. [less ▲]

Detailed reference viewed: 25 (2 ULg)