Etablissement de listes de sélectivité de pesticides vis-à-vis de l'entomofaune utile dans le cadre de la production intégrée en grandes cultures

in AFPP - 6ème conférence Internationale sur les Ravageurs en Agriculture (2002, December)

Systemic release of endotoxins induced by gentle mastication: Association with periodontitis severity

in Journal of Dental Research (2002, December), 81(Sp. Iss. B), 235-235

Do Bovine Lymphocytes Express a Peculiar Prion Protein?

in Developmental Immunology (2002), 9(4), 245-52

The cellular prion protein (PrPc) is a glycolipid-anchored cell surface protein that usually exhibits three glycosylation states. Its post-translationally modified isoform, PrPsc, is involved in the ... [more ▼]

The cellular prion protein (PrPc) is a glycolipid-anchored cell surface protein that usually exhibits three glycosylation states. Its post-translationally modified isoform, PrPsc, is involved in the pathogenesis of various transmissible spongiform encephalopathies (TSEs). In bovine species, BSE infectivity appears to be restricted to the central nervous system; few or no detectable infectivity is found in lymphoid tissues in contrast to scrapie or variant CJD. Since expression of PrPc is a prerequisite for prion replication, we have investigated PrPc expression by bovine immune cells. Lymphocytes from blood and five different lymph organs were isolated from the same animal to assess intra- and interindividual variability of PrPc expression, considering six individuals. As shown by flow cytometry, this expression is absent or weak on granulocytes but is measurable on monocytes, B and T cells from blood and lymph organs. The activation of the bovine cells produces an upregulation of PrPc. The results of our in vitro study of PrPc biosynthesis are consistent with previous studies in other species. Interestingly, western blotting experiments showed only one form of the protein, the diglycosylated band. We propose that the glycosylation state could explain the lack of infectivity of the bovine immune cells. [less ▲]

Le coordinateur de chantier dans les travaux provisoires ou mobiles

in Actes de l'après-midi d'études "Actualités législatives en droit immobilier (2000-2002) (2002, December)

Exploring the effect of action familiarity on SPTs recall performance in Alzheimer's disease

in Journal of Clinical & Experimental Neuropsychology (2002), 24(8), 1057-1069

This study examined the performance of normal controls (NC) and Alzheimer's disease (AD) patients on free recall, semantic cued recall and object cued recall of both subject-performed tasks (SPTs) and ... [more ▼]

This study examined the performance of normal controls (NC) and Alzheimer's disease (AD) patients on free recall, semantic cued recall and object cued recall of both subject-performed tasks (SPTs) and verbal descriptions of actions, by controlling familiarity of actions associated to objects. The results showed that both groups performed better after SPT encoding than after verbal encoding. in all three types of recall. In addition, this SPT advantage was greater for AD patients than for NC in the object cued recall test, emphasizing AD patients' sensibility to the congruence of cues between encoding and retrieval conditions. Following verbal encoding. NC showed a better recall for less familiar actions than for highly familiar actions, whereas AD patients exhibited the opposite pattern. These results reflect that AD patients did not benefit from a distinctiveness effect at encoding for improving subsequent retrieval of verbal information, probably due to a reduced level of elaboration during encoding. However, there was no effect of action familiarity on recall performance by both groups following SPT encoding. These results suggest that memory for verbal actions and SPTs is governed by different principles. In addition. they demonstrate the robustness of the SPT effect in AD patients, who were able to improve memory performance in the SPT condition not only with highly familiar actions but also with less familiar actions. [less ▲]

Déplacement, hybridité et quête d'identité dans le cinéma des réalisateurs belges issus de l'immigration

Conference (2002, December)

Structure and dynamics of candidate O star bubbles in N44

in Astronomical Journal (The) (2002), 124(6), 3325-3335

Dynamical studies of superbubbles and Wolf-Rayet ring nebulae show discrepancies from the standard adiabatic model for windblown bubbles. We therefore study the physical properties and kinematics of three ... [more ▼]

Dynamical studies of superbubbles and Wolf-Rayet ring nebulae show discrepancies from the standard adiabatic model for windblown bubbles. We therefore study the physical properties and kinematics of three candidate bubbles blown by single O stars to evaluate whether these discrepancies are also found in these simpler objects. Our sample candidates are N44 F, N44 J, and N44 M, in the outskirts of the H II complex N44 in the Large Magellanic Cloud. We have obtained ground-based and Hubble Space Telescope emission-line images and high-dispersion echelle spectra for these objects. From the Halpha luminosities and the [ O III]/ Halpha ratios of these nebulae, we estimate the spectral types of the ionizing stars to be O7 V, O9.5 V, and O9.5 V for N44 F, N44 J, and N44 M, respectively. We. find that the observed expansion velocity of 12 km s(-1) for N44 F is consistent with the stellar wind luminosity expected from the central ionizing star, as predicted by the standard bubble model. The observed upper limits for the expansion velocities of N44 J and N44 M are also compatible with the expected values, within the uncertainties. We also report the discovery in N44 F of strongly defined dust columns, similar to those seen in the Eagle Nebula. The photoevaporation of these dense dust features may be kinematically important and may actually govern the evolution of the shell. The inclusion of photoevaporation processes may thus undermine the apparent agreement between the observed bubble dynamics and the simple adiabatic models. [less ▲]

La réponse pénale du juge à l'auteur d'une infraction routière

in Actes du colloque: "Sécurité routière: quelle réponse pénale?" (2002, December)

EU-MERCOSUR interregionalism: Facing Up to the South American Crisis and the Free Trade Area of the Americas

in European Foreign Affairs Review (2002), 7

As part of their plans to diversify and globalize their foreign relations, the EU and MERCOSUR have been working to establish closer links. They have a project to create an interregional Association based ... [more ▼]

As part of their plans to diversify and globalize their foreign relations, the EU and MERCOSUR have been working to establish closer links. They have a project to create an interregional Association based on political dialogue, cooperation and trade issues. To understand the evolution of this interregional relationship, it is also important to take into account the USAs’ project, which seeks to create a hemispheric market for 2005 and in which MERCOSUR is participating. There is competition between Europe and the USA in the Southern Cone. While the EU has often provided support for institution building in MERCOSUR, the latter has frequently been destabilized by US regionalist strategy. The USA has often taken advantage of its special relationship with Argentina. However, the open crises that Argentina has faced since December 2001, and the US attitude towards the crises, appear to have affected the Buenos Aires foreign policy alignment with Washington. What geopolitical consequences could this have for the area? And what is the US position on this development? Has the EU taken advantage of the situation to reinforce its interregional partnership with MERCOSUR and to counteract US influence in the region? [less ▲]

"Le FLES à l'aube d'une ère nouvelle ? Ebauche d'un bilan des formations en didactique du français langue étrangère et seconde en Communauté française"

in Français 2000, Bulletin de la Société Belge des Professeurs de Français (2002), 181-182