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See detailAdaptive λ-tracking for Systems with Higher Relative Degree
Bullinger, Eric ULg

Doctoral thesis (2000)

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See detailInhibition of cellular invasion by 3-chlorophenyl 6-(acetoxymethyl)-2-oxo-2H-1-benzopyran-3-carboxylate
Kempen, I.; Pochet, L.; Papapostulu, D. et al

Poster (2000, September)

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See detailEffect on the pancreatic endocrine system of 3-alkylamino-7-chloro-4H-1,2,4-benzothiadiazine 1,1-dioxides structurally related to diazoxide
Boverie, S.; Antoine, M. H.; Becker, B. et al

Poster (2000, September)

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See detailOntogeny of Aromatase and Tyrosine Hydroxylase Activity and of Aromatase-Immunoreactive Cells in the Preoptic Area of Male and Female Japanese Quail
Balthazart, Jacques ULg; Tlemcani, O.; Harada, N. et al

in Journal of Neuroendocrinology (2000), 12(9), 853-66

The aromatization of testosterone into oestrogens plays a key role in the control of many behavioural and physiological aspects of reproduction. In the quail preoptic area (POA), aromatase activity and ... [more ▼]

The aromatization of testosterone into oestrogens plays a key role in the control of many behavioural and physiological aspects of reproduction. In the quail preoptic area (POA), aromatase activity and the number of aromatase-immunoreactive (ARO-ir) cells are sexually differentiated (males > females). This sex difference is implicated in the control of the sexually dimorphic behavioural response of quail to testosterone. We analysed the ontogenetic development of this sex difference by measuring aromatase activity and counting ARO-ir cells in the POA of males and females from day 1 post hatch to sexual maturity. We investigated in parallel another enzyme: tyrosine hydroxylase, the rate limiting step in catecholamine synthesis. Between hatching and 4 weeks of age, aromatase activity levels were low and equal in males and females. Aromatase activity then markedly increased in both sexes when subjects initiated their sexual maturation but this increase was more pronounced in males so that a marked difference in aromatase activity was present in 6 and 8 week-old subjects. Tyrosine hydroxylase activity progressively increased with age starting immediately after hatching and there was no abrupt modification in the slope of this increase when birds became sexually mature. No sex difference was detected in the activity of this enzyme. The number of ARO-ir cells in the POA progressively increased with age starting at hatching. No sex difference in ARO-ir cell numbers could be detected before subjects reached full sexual maturity. The analysis of the three-dimensional organization of ARO-ir cells in the POA revealed that, with increasing ages, ARO-ir cells acquire a progressively more lateral position: they are largely periventricular in young birds but they are found at higher density in the lateral part of the medial preoptic nucleus in adults. These data indicate that aromatase activity differentiates sexually when birds reach sexual maturity presumably under the activating effects of the increased testosterone levels in males. The number of ARO-ir cells, however, begins to increase in a non sexually differentiated manner before the rise in plasma testosterone in parallel with the increased tyrosine hydroxylase activity. Whether this temporal coincidence results from a general ontogenetic pattern or from more direct causal links remains to be established. [less ▲]

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See detailTatouages. Du rituel a la parure avec leurs complications
Paquet, Philippe ULg; Pierard, Gérald ULg; Nikkels, Arjen ULg et al

in Revue Médicale de Liège (2000), 55(9), 847-849

Tattoos are performed for distinct purposes which range from social rituals to aesthetic aims. They are permanent or transient according to the site of the pigments being located either in the dermis or ... [more ▼]

Tattoos are performed for distinct purposes which range from social rituals to aesthetic aims. They are permanent or transient according to the site of the pigments being located either in the dermis or in the stratum corneum, respectively. Tattoos may be responsible for allergic reactions, infections or psychological distress of the subject who requests to be relieved of it. [less ▲]

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See detailTernary polymer blend with core-shell dispersed phases: effect of the core-forming polymer on phase morphology and mechanical properties
Luzinov, Igor; Pagnoulle, Christophe; Jérôme, Robert ULg

in Polymer (2000), 41(19), 7099-7109

Phase morphology and mechanical properties of ternary blends consisting of PS (polystyrene), SBR (styrene butadiene rubber) and different polyolefins (POs) have been studied. PS, systematically forms the ... [more ▼]

Phase morphology and mechanical properties of ternary blends consisting of PS (polystyrene), SBR (styrene butadiene rubber) and different polyolefins (POs) have been studied. PS, systematically forms the matrix, SBR and PO being combined in the dispersed phase. Although POs of various melt viscosity and stiffness are used, the binary (SBR/PO) dispersed phase is of a core-shell structure, in which PO forms the core. Upon increasing the viscosity of PO, the average size of the cores and the SBR domains including them increases. Comparison of the experimental shear storage modulus of the blends with theoretical predictions indicates that the stress transfer from the PS matrix to the PO core through the SBR shell depends on the modulus of the SBR envelope. The ultimate mechanical properties of the ternary blends are sensitive to the stiffness of the PO core. [less ▲]

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See detailOn the link between design against fatigue and fracture mechanics
Debongnie, Jean-François ULg

in ASME (Ed.) Proceedings of the 2000 ASME Design Engineering Technical Conferences (2000, September)

The gradient method, often used in design against fatigue, is analyzed from the point of view of its link with fracture mechanics. By a logical step, a law is deduced for the variation of the endurance ... [more ▼]

The gradient method, often used in design against fatigue, is analyzed from the point of view of its link with fracture mechanics. By a logical step, a law is deduced for the variation of the endurance limit in terms of the relative stress gradient. The proposed expression is found to be in good agreement with older ones and may easily be extended to a large class of materials. [less ▲]

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See detailL'union libre et la réparation des accidents mortels de travail
Michiels, Olivier ULg

in Divorce : Actualité Juridique, Sociale et Fiscale (2000), 9

L'article s'attache à la question de l'indemnisation du compagnon ou de la campagne d'un travailleur qui décède au cours d'un accident du travail.

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See detailVoxel-based distribution of metabolic impairment in corticobasal degeneration
Garraux, Gaëtan ULg; Salmon, Eric ULg; Peigneux, Philippe ULg et al

in Movement Disorders (2000), 15(5), 894-904

This report emphasizes the precise topographic distribution of cerebral metabolic impairment in corticobasal degeneration (CBD) and the pathophysiological differences between CBD and progressive ... [more ▼]

This report emphasizes the precise topographic distribution of cerebral metabolic impairment in corticobasal degeneration (CBD) and the pathophysiological differences between CBD and progressive supranuclear palsy (PSP). Statistical parametric mapping (SPM96) analysis of 18FDG positron emission tomography (PET) data was performed in 22 patients with CBD compared with 46 healthy subjects (HS) and 21 patients with PSP who were studied at rest. A statistical threshold of p <0.001 was fixed, further corrected for multiple or independent comparisons (p <0.05). In comparison with HS, the metabolic impairment in CBD was asymmetrically distributed in the putamen, thalamus, precentral (Brodmann's area, BA 4), lateral premotor (BA 6/44) and supplementary motor areas (SMA, BA 6), dorsolateral prefrontal (8/9/46) cortex, and the anterior part of the inferior parietal lobe (BA 40) including the intraparietal sulcus (BA 7/40). A similar hypometabolic pattern was observed for most individual analyses. When PSP was compared with CBD, metabolic impairment predominated in the midbrain, anterior cingulate (BA 24/32), and orbitofrontal regions (BA 10). The reverse contrast showed more posterior involvement in CBD (BA 6 and 5/7/40) including SMA. Our data suggest that multiple components of neural networks related to both movement execution and production of skilled movements are functionally disturbed in CBD compared with both HS and PSP. [less ▲]

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See detailAn agent-inspired active network resource trading model applied to congestion control
Yamamoto, Lidia; Leduc, Guy ULg

in Lecture Notes in Computer Science (2000, September), 1931

In order to accommodate fluctuations in network conditions, adaptive applications need to obtain information about resource availability, Using active networks, new models for adaptive applications can be ... [more ▼]

In order to accommodate fluctuations in network conditions, adaptive applications need to obtain information about resource availability, Using active networks, new models for adaptive applications can be envisaged, which can benefit from the possibility to send mobile code to the network nodes. We describe a model for trading resources inside an active net-work node, based on the interaction between capsules as reactive user agents, and resource manager agents which reside in the network nodes. We apply the model to the case of a many-to-one audio application with congestion control, which trades off link resources against memory when there is congestion at the outgoing interface towards the destination. Our simulation results indicate that the application makes effective use of the available resources, and it also allows resources to be shared according to user preferences. [less ▲]

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See detailCombined Suicide and Cytokine Gene Therapy for Peritoneal Carcinomatosis
Lechanteur, Chantal ULg; Delvenne, Philippe ULg; Princen, Frédéric et al

in Gut (2000), 47(3), 343-8

BACKGROUND: Gene therapy is a novel approach for the treatment of cancers, and tumours disseminated in the peritoneal cavity are suitable for in situ delivery of a therapeutic gene. AIMS: The efficacy of ... [more ▼]

BACKGROUND: Gene therapy is a novel approach for the treatment of cancers, and tumours disseminated in the peritoneal cavity are suitable for in situ delivery of a therapeutic gene. AIMS: The efficacy of a therapy combining a suicide gene (herpes simplex virus type I thymidine kinase (HSV-TK)) and cytokine genes was investigated in a model of peritoneal carcinomatosis induced by colon carcinoma cells in syngeneic rats. MATERIAL AND METHODS: Pre-established macroscopic tumours in BDIX rats were treated by intraperitoneal injections of retrovirus producing cells (FLYA13 TK, FLYA13 granulocyte macrophage-colony stimulating factor (GM-CSF), FLYA13 interleukin 12 (IL-12)) and ganciclovir (GCV). RESULTS: TK/GCV treated animals showed a slight increase in survival time (72 days) compared with the control group (63 days) while the association of cytokine and TK/GCV gene therapy resulted in significantly improved survival, with a large proportion of animals remaining tumour free on day 480 (60% and 40% for TK/GCV/GM-CSF and TK/GCV/IL-12 treated animals, respectively). Histological analysis of treated animals showed that the remaining tumour nodes were infiltrated by mononuclear cells but no major differences were observed between the various treatments. Immunohistochemical analysis revealed that lymphoid CD4(+) and CD8(+) T cells as well as macrophages accumulated outside untreated tumour nodes while CD8(+) and CD25(+) activated T cells and macrophages heavily infiltrated the tumours after the different treatments. CONCLUSIONS: Our data indicate that combined suicide and cytokine gene therapy is a powerful approach for the treatment of macroscopic peritoneal carcinomatosis. [less ▲]

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See detailLes aéroports wallons
Thiry, Bernard ULg; Charlier, J.; Delepiere, Ch. et al

Report (2000)

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See detailTransport ferroviaire à grande vitesse - Les passagers
Gathon, Henry-Jean ULg; Thiry, Bernard ULg; Charlier, J. et al

Report (2000)

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See detailLa gestion environnementale des aéroports
Charlier, J.; Delepiere, Ch.; Marchal, Jean ULg et al

Report (2000)

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See detailDe consensus en blocus. La gestion des spécificités nationales, linguistiques et culturelles dans les évaluations internationales de la lecture
Baye, Ariane ULg

Master of advanced studies dissertation (2000)

This paper examines how was managed the linguistic and cultural diversity of participating countries in international reading assessment, from the first IEA reading and literature surveys to the PISA 2000 ... [more ▼]

This paper examines how was managed the linguistic and cultural diversity of participating countries in international reading assessment, from the first IEA reading and literature surveys to the PISA 2000 OECD project. [less ▲]

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See detailL'écriture en chantier
Baye, Ariane ULg; Denooz, Régine

Learning material (2000)

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See detailRapid intrapartum test (Strep B OIA) and prenatal cultures for identification of group B streptococcal carriers at delivery: a prospective study
MELIN, Pierrette ULg; Schmitz, Myriam; Tsobo, Chantal et al

in AAmerican Society of Microbiology (Ed.) Program and Abstracts of the 40th Intersciences Conference on Antimicrobial Agents and Chemotherapy (2000, September)

Background: The efficacy of the prenatal screening-based approach recommended by the CDC to prevent neonatal GBS diseases could be improved by using a good rapid test performed at the onset of labor. To ... [more ▼]

Background: The efficacy of the prenatal screening-based approach recommended by the CDC to prevent neonatal GBS diseases could be improved by using a good rapid test performed at the onset of labor. To assess the Strep B OIA® test (Biostar, Boulder, Co), completed in 30 minutes, we initiated a 6-center study to compare it with prenatal screening cultures to identify GBS carriers at delivery or opportunities to initiate intrapartum antibioprophylaxis (IAP). Methods: For a total of 539 pregnant women included in the study, pairs of vaginal/anal specimens collected at 35-37 weeks and intrapartum vaginal specimens were plated onto colistin-nalidixic agar and then inoculated into selective LIM broth for the detection of GBS. Furthermore, on each intrapartum vaginal swab a Strep B OIA test was performed. Results: GBS were recovered in culture from 89 prenatal screenings (17%) and from 71 specimens collected at delivery (13%). Strep B OIA test identified 48 positive specimens (9%). Respectively, for the identification of GBS carriers at delivery, sensitivity, specificity, positive and negative predictive values for prenatal screening cultures were 69%, 91%, 55% and 95% and for Strep B OIA tests they were 63%, 99%, 94% and 95%. Evaluating opportunities to start an IAP, based on Strep OIA test versus prenatal screening cultures, 45 IAP vs. 49 would have been useful, 3 vs. 40 useless (P< 0,001) and 26 vs. 22 missed. Conclusion: To identify GBS carriers, the Strep B OIA test, performed at the time of onset of labor is equally sensitive to prenatal screening cultures and would allow a highly significant reduction of useless IAP. [less ▲]

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See detailRatio of pyoverdines and dihydropyoverdines produced by Pseudomonas putida. BTP16 is influenced by the growth rate of the strain.
Jacques, Ph.; Ongena, Marc ULg; Bernard, F. et al

Poster (2000, September)

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See detailStudy of lipase production by yeast Yarrowia lipolytica
Fickers, P.; Destain, Jacqueline ULg; Thonart, Philippe ULg

Poster (2000, September)

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