Publications ORBi OA
Experimental dissociations between memory measures: Influence of retrieval strategies.
Willems, Sylvie ;
in Consciousness & Cognition (2008)
The objective of this study was to explore the participants' processing strategies on the mere exposure effect, object decision priming and explicit recognition. In Experiments 1, we observed that ... [more ▼]
The objective of this study was to explore the participants' processing strategies on the mere exposure effect, object decision priming and explicit recognition. In Experiments 1, we observed that recognition and the mere exposure effect for unfamiliar three-dimensional objects were not dissociated by plane rotations in the same way as recognition and object decision priming. However, we showed that, under identical conditions, prompting analytic (part-based) processing at testing produced a large plane rotation effect on recognition and the mere exposure effect similar to that observed for object decision priming (Experiment 2). Furthermore, inducing a non-analytic (whole-based) processing strategy at testing produced a reduced plane rotation effect on recognition and object decision (Experiments 3 and 4), similar to that observed for the mere exposure effect. These findings suggest that participants' processing strategies influence performance on the three tasks. [less ▲]Detailed reference viewed: 52 (5 ULg)
Le syndrome métabolique, physiopathologie et traitement
in Athérosclérose, athérothrombose. Quoi de neuf? (2008)Detailed reference viewed: 526 (6 ULg)
Unitarisation and black-disk limit at the LHC in the presence of a hard pomeron
Cudell, Jean-René ;
in Physics Letters B (2008), 662(5), 417-423
Recent models of soft diffraction include a hard pomeron pole besides the usual soft term. Such models violate the black-disk limit around Tevatron energies, so that they need to be supplemented by a ... [more ▼]
Recent models of soft diffraction include a hard pomeron pole besides the usual soft term. Such models violate the black-disk limit around Tevatron energies, so that they need to be supplemented by a unitarisation scheme. Two standard schemes are considered in this Letter, and we show that they lead to an uncertainty at the LHC much larger than previously estimated. We also examine the signature of unitarisation on various small-t observables, the slope in t of the elastic cross section, or the ratio of the real to imaginary parts of the scattering amplitude, and show that the existence of a unitarised hard pomeron in soft scattering may be confirmed by LHC data. (C) 2008 Elsevier B.V. All rights reserved. [less ▲]Detailed reference viewed: 32 (7 ULg)
Jouer avec les règles plutôt que jouer le jeu. Donjon, une oeuvre hors-normes ?
in Art&Fact (2008), 27Detailed reference viewed: 136 (25 ULg)
Dineren onder vrienden (en rivalen). Literaire prijzen, netwerken en consecratiestrategieën
Dozo, Björn-Olav ;
in Freespace Nieuwzuid (2008), 32Detailed reference viewed: 97 (6 ULg)
La mémoire verbale à court terme : un simple produit des interactions entre systèmes langagiers, attentionnels et de traitement de l’ordre sériel
in Psychologie Française (2008), 53Detailed reference viewed: 255 (24 ULg)
Neural networks for short-term memory for order differentiate high and low proficiency bilinguals
Majerus, Steve ; Belayachi, Sanaa ; et al
in NeuroImage (2008), 42Detailed reference viewed: 133 (30 ULg)
Dissociation of perceptual and motor inhibitory processes in young and elderly participants using the Simon task.
Germain, Sophie ; Collette, Fabienne
in Journal of the International Neuropsychological Society (2008), 14(6), 1014-21
Deficits in inhibitory abilities are frequently observed in normal aging. However, few studies have explored the generality of these deficits in a single group of participants. Here, we used an adaptation ... [more ▼]
Deficits in inhibitory abilities are frequently observed in normal aging. However, few studies have explored the generality of these deficits in a single group of participants. Here, we used an adaptation of the Simon task to differentially assess perceptual and motor inhibition using the same stimuli and task design and to determine whether these processes use separate or shared cognitive resources. We were interested in determining whether (1) normal aging is associated with the use of separate (as previously evidenced in young participants) or similar cognitive resources to perform perceptual and motor inhibition tasks; (2) older participants present a specific impairment in one of these two processes. Analyses of reaction times indicated that motor and perceptual inhibitory processes share some cognitive resources and both are impaired in normal aging. These results can be interpreted by considering that a dedifferentiation process is responsible for the inhibitory deficits presented by older participants. [less ▲]Detailed reference viewed: 41 (8 ULg)
Cystatin C, renal function, and cardiovascular risk.
Delanaye, Pierre ; Cavalier, Etienne ; Krzesinski, Jean-Marie
in Annals of Internal Medicine (2008), 148(4), 323Detailed reference viewed: 28 (3 ULg)
Cystatin C-based equations: don't repeat the same errors with analytical considerations.
Delanaye, Pierre ; Cavalier, Etienne ; Krzesinski, Jean-Marie et al
in Nephrology Dialysis Transplantation (2008), 23(3), 10651065-6Detailed reference viewed: 27 (2 ULg)
Creatinine calibration in NHANES: is a revised MDRD study formula needed?
Delanaye, Pierre ; Cavalier, Etienne ; et al
in American Journal of Kidney Diseases (2008), 51(4), 709709-10Detailed reference viewed: 32 (2 ULg)
Structure development of resorcinol-formaldehyde gels: either microphase separation or colloid aggregation
Gommes, Cédric ;
in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2008), 77
Time-resolved small-angle x-ray scattering (SAXS) is used to follow the formation of resorcinol-formaldehyde (RF) gels. An existing morphological model based on Gaussian random fields, and validated on RF ... [more ▼]
Time-resolved small-angle x-ray scattering (SAXS) is used to follow the formation of resorcinol-formaldehyde (RF) gels. An existing morphological model based on Gaussian random fields, and validated on RF aerogels, is generalized to analyze the data. The generalization is done in two different ways, one being relevant to colloid aggregation and the other to microphase separation. The SAXS data do not enable discrimination between the two mechanisms of gel formation, which shows that aggregation and microphase separation can generate very similar morphologies at the length scales explored by SAXS. Furthermore, physical arguments suggest that, in the case of RF gels, aggregation and microphase separation can be regarded as two idealizations of the same complex physical process. [less ▲]Detailed reference viewed: 53 (5 ULg)
Impact of different spectroscopic datasets on CH4 retrievals from Jungfraujoch FTIR spectra
Duchatelet, Pierre ; Mahieu, Emmanuel ; Demoulin, Philippe et al
Due to its high warming potential and its relatively long chemical lifetime (~9 years), atmospheric methane (CH4) plays a major role in the radiative forcing responsible of the greenhouse effect. Methane ... [more ▼]
Due to its high warming potential and its relatively long chemical lifetime (~9 years), atmospheric methane (CH4) plays a major role in the radiative forcing responsible of the greenhouse effect. Methane also affects climate by influencing tropospheric ozone and stratospheric water. High quality methane data sets are needed to understand its cycle and evaluate its budget of sources and sinks. Methane vertical distribution as well as total and partial column time series can be retrieved from high-resolution ground-based FTIR spectra, using, e.g., the SFIT-2 algorithm which implements the Optimal Estimation Method of Rodgers . However, although several retrieval approaches characterized by relatively high information content exist, methane retrieved profiles very often present large oscillations in their tropospheric range, which might result partly from inappropriate or inconsistent parameters. Significant improvements on retrieval quality should therefore be reached by using more accurate or compatible CH4 spectroscopic data. The main purpose of this contribution is to test and compare three different sets of CH4 spectroscopic parameters and to quantify their impact on CH4 retrieved products as well as on the fitting quality. [less ▲]Detailed reference viewed: 83 (6 ULg)
Comment je traite...La leucémie myéloblastique aiguë (LMA) du sujet age en bon état général.
Lejeune, Marie ; Beguin, Yves ; De Prijck, Bernard et al
in Revue Médicale de Liège (2008), 63(2), 59-63
This article describes the treatment of acute myeloid leukemia in older patients with good performance status, and then discusses briefly some future therapeutic perspectives.Detailed reference viewed: 208 (18 ULg)
Proteomic changes in rat hippocampus and adrenals following short-term sleep deprivation.
; ; et al
in Proteome Science (2008), 6
ABSTRACT: BACKGROUND: To identify the biochemical changes induced by sleep deprivation at a proteomic level, we compared the hippocampal proteome of rats either after 4 hours of sleep or sleep deprivation ... [more ▼]
ABSTRACT: BACKGROUND: To identify the biochemical changes induced by sleep deprivation at a proteomic level, we compared the hippocampal proteome of rats either after 4 hours of sleep or sleep deprivation obtained by gentle handling. Because sleep deprivation might induce some stress, we also analyzed proteomic changes in rat adrenals in the same conditions. After sleep deprivation, proteins from both tissues were extracted and subjected to 2D-DIGE analysis followed by protein identification through mass spectrometry and database search. RESULTS: In the hippocampus, 87 spots showed significant variation between sleep and sleep deprivation, with more proteins showing higher abundance in the latter case. Of these, 16 proteins were present in sufficient amount for a sequencing attempt and among the 12 identified proteins, inferred affected cellular functions include cell metabolism, energy pathways, transport and vesicle trafficking, cytoskeleton and protein processing. Although we did not observe classical, macroscopic effect of stress in sleep-deprived rats, 47 protein spots showed significant variation in adrenal tissue between sleep and sleep deprivation, with more proteins showing higher abundance following sleep. Of these, 16 proteins were also present in sufficient amount for a sequencing attempt and among the 13 identified proteins, the most relevant cellular function that was affected was cell metabolism. CONCLUSION: At a proteomic level, short term sleep deprivation is characterized by a higher expression of some proteins in the hippocampus and a lower abundance of other proteins in the adrenals (compared to normal sleep control). Altogether, this could indicate a general activation of a number of cellular mechanisms involved in the maintenance of wakefulness and in increased energy expenditure during sleep deprivation. These findings are relevant to suggested functions of sleep like energy repletion and the restoration of molecular stocks or a more global homeostasis of synaptic processes. [less ▲]Detailed reference viewed: 92 (8 ULg)
Comment aborder un problème de rétention d’arrière-faix chez la jument ?
Conference (2008)Detailed reference viewed: 118 (19 ULg)
Importance of the conserved residues in the peptidoglycan glycosyltransferase module of the class A penicillin-binding protein 1b of Escherichia coli.
Terrak, Mohammed ; Sauvage, Eric ; Derouaux, Adeline et al
in Journal of Biological Chemistry (2008), 283(42), 28464-70
The peptidoglycan glycosyltransferase (GT) module of class A penicillin-binding proteins (PBPs) and monofunctional GTs catalyze glycan chain elongation of the bacterial cell wall. These enzymes belong to ... [more ▼]
The peptidoglycan glycosyltransferase (GT) module of class A penicillin-binding proteins (PBPs) and monofunctional GTs catalyze glycan chain elongation of the bacterial cell wall. These enzymes belong to the GT51 family, are characterized by five conserved motifs, and have some fold similarity with the phage lambda lysozyme. In this work, we have systematically modified all the conserved amino acid residues of the GT module of Escherichia coli class A PBP1b by site-directed mutagenesis and determined their importance for the in vivo and in vitro activity and the thermostability of the protein. To get an insight into the GT active site of this paradigm enzyme, a model of PBP1b GT domain was constructed based on the available crystal structures (PDB codes 2OLV and 2OLU). The data show that in addition to the essential glutamate residues Glu233 of motif 1 and Glu290 of motif 3, the residues Phe237 and His240 of motif 1 and Gly264, Thr267, Gln271, and Lys274 of motif 2, all located in the catalytic cavity of the GT domain, are essential for the in vitro enzymatic activity of the PBP1b and for its in vivo functioning. Thus, the first three conserved motifs contain most of the residues that are required for the GT activity of the PBP1b. The residues Asp234, Phe237, His240, Thr267, and Gln271 are proposed to maintain the structure of the active site and the positioning of the catalytic Glu233. [less ▲]Detailed reference viewed: 82 (13 ULg)
L'accès aux documents administratifs, un itinéraire sinueux
Lewalle, Paul ; Donnay, Luc ; Rosoux, Géraldine
in Renders, David (Ed.) L'accès aux documents administratifs (2008)Detailed reference viewed: 217 (19 ULg)