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See detailMeasurement of PCB-153 and DDE in 20 μL dried-blood spots
L'Homme, Benjamin ULg; Focant, Jean-François ULg

in Organohalogen Compounds (2012), 74

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See detailEcologie des tritons au Pays de Herve: influence des habitats à plusieurs échelles
Denoël, Mathieu ULg; Perez, Amélie; Ficetola, G. Francesco

in Echo des Rainettes (2012), 10

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See detailMagnetic properties of nanosized MgFe2O4 powders prepared by auto-combustion
Ghelev, Ch; Koutzarova, T.; Kolev, S. et al

in Journal of Physics: Conference Series (2012), 356(1), 012048

Targets were prepared to be used for magnetron sputtering and laser ablation and their microstructural and magnetic properties were investigated. The base material was nanosized MgFe2O4 powder produced by ... [more ▼]

Targets were prepared to be used for magnetron sputtering and laser ablation and their microstructural and magnetic properties were investigated. The base material was nanosized MgFe2O4 powder produced by citrate auto-combustion synthesis. The auto-combusted powders were annealed at temperatures in the range 600 - 1000°C in air to study the effect of temperature on thofe formation MgFe2O4. The saturation magnetization Ms was 24.30 emu/g at room temperature. © Published under licence by IOP Publishing Ltd. [less ▲]

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See detailCorals of the Upper Viséan Microbial-Sponge-Bryozoan-Coral Bioherm of Kongul Yayla (Taurides, S Turkey), Palaeobiogeographic Relations
Denayer, Julien ULg

in Turkish Association of Petroleum Geologists, Special Publication (2012), 6

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See detailLa contribution du Centre européen d'archéométrie (ULg) à la base de données internationale "Digital collaboratory for cultural-historiocal dendrochronology in the Low Countries (DCCD)
Hoffsummer, Patrick ULg; Lambert, Georges-Noël

in Archeologia Mediaevalis, archéologie du Moyen Âge et des Temps modernes dans les trois régions belges et les pays limitrophes (2012), 35

This paper is a description of the dendrochronological metadata data of University of Liège we can consult on the International Digital collaboratory for Cultural-historical Dendrochronology in the Low ... [more ▼]

This paper is a description of the dendrochronological metadata data of University of Liège we can consult on the International Digital collaboratory for Cultural-historical Dendrochronology in the Low-Countries (DCCD, on line). It also mention the process used to realise this project with the help of a new software "Dendron IV". [less ▲]

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See detailExcited baryons in the 1/Nc expansion.
Matagne, Nicolas; Stancu, Floarea ULg

in AIP Conference Proceedings (2012), 1432

We briefly describe the 1/Nc expansion method for studying baryon masses. Two approaches of the large Nc excited baryons have been proposed so far. The first one, based on the Hartree picture, treats the ... [more ▼]

We briefly describe the 1/Nc expansion method for studying baryon masses. Two approaches of the large Nc excited baryons have been proposed so far. The first one, based on the Hartree picture, treats the baryon as a ground state core and an excited quark and the second one, suggested recently, considers the baryon globally, without decoupling the system. The masses of excited states of mixed orbital symmetry of nonstrange and strange baryons belonging to the lowest [70, −] multiplet are calculated in the 1/Nc expansion to order 1/Nc with the new method which allows to considerably reduce the number of linearly independent operators entering the mass formula. The status of the resonance Λ(1405) is discussed. [less ▲]

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See detailDoes delay release the verbal overshadowing effect in child and adult eyewitnesses?
Vanootighem, Valentine ULg; Brédart, Serge ULg; Dehon, Hedwige ULg

in Perception (2012), 41(supplement), 194

The verbal overshadowing effect (VO) (eg, Schooler and Engstler-Schooler, 1990 Cognitive Psychology 22(1) 36–71) suggests that the fact of generating a verbal description of a previously seen face may ... [more ▼]

The verbal overshadowing effect (VO) (eg, Schooler and Engstler-Schooler, 1990 Cognitive Psychology 22(1) 36–71) suggests that the fact of generating a verbal description of a previously seen face may impair subsequent performance on a lineup identification task in adults. Previous research has examined whether descriptions also impaired children’s identification abilities but no evidence of VO was found (Memon and Rose, 2002 Psychology, Crime and Law 8(3), 229–242). However, the method might not have been appropriate to observe this effect as, for instance, a 24-hour delay between the description and the identification tasks (associated with a release of the VO effect in adults) was used. Hence, in this current experiment, groups of children (7–8, 10–11, 13–14 years old) and adults were presented with a short video and then assigned to a description or a no description condition before the identification task. Participants were also assigned either to a “no delay”, a “24-hour post encoding delay” or a “24-hour post description delay” condition to determine the influence of delay on the VO effect. Results indicated that, compared to the control condition, the description decreased correct identification performance in both children and adults and no release of VO was found with delay. [less ▲]

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See detailAntioxidant and anti-inflammatory like properties of benzoic acid analogs on the oxidant response of neutrophils: structure/redox potential relationship study.
Franck, Thierry ULg; Mouithys-Mickalad, Ange ULg; Robert, Thierry ULg et al

in Free Radical Biology & Medicine (2012), 53(supplement 1),

We investigated the antioxidant capacity of phenolic acid derivatives by measuring their capacity to prevent ABTS oxidation and evaluating their anti-inflammatory like-properties on the oxidant response ... [more ▼]

We investigated the antioxidant capacity of phenolic acid derivatives by measuring their capacity to prevent ABTS oxidation and evaluating their anti-inflammatory like-properties on the oxidant response of neutrophils, especially on superoxide anion production and the activity of myeloperoxidase (MPO), an oxidant enzyme present and released by the primary granules of neutrophils. The superoxide anion production by PMA-stimulated neutrophils was measured by lucigenin-enhanced chimiluminescence (CL) and the activity of MPO by SIEFED to study the potential interaction of a molecule with the enzyme without interferences due to medium. The antioxidant and anti-inflammatory activities of the phenolic compounds were correlated to their redox potentials measured by voltammetry method, and discussed in relation to their molecular structure. The ability of the phenolic molecules to decrease ABTS oxidation and CL production was inversely correlated to their redox potential increasing as follows: propyl gallate > gallic acid > caffeic acid > 3,4-dihydroxybenzoic acid > ferulic acid > syringic acid > 2,6-dihydroxybenzoic acid > salicylic acid > benzoic acid. The number of hydroxyl groups (3) and their position (catechol) were essential for the efficacy of the molecules as stoichiometric antioxidants or scavengers. On MPO activity, the inhibitory capacity of the molecules was not really correlated with their redox potential and increased as follows: gallic acid > caffeic acid > 2,6-dihydroxybenzoic acid > propyl gallate > ferulic acid = syringic acid > 3,4-dihydroxybenzoic acid = salicylic acid > benzoic acid. The number of OH groups and the elongation of the carboxyl group were essential for the inhibition of MPO activity, probably by facilitating the interaction with the MPO active site or structure. The redox potential measurement seems to be a good technique to select stoichiometric antioxidants, but not anti-catalytic ones. [less ▲]

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See detailOptimization of thermal material in a flux pump system with high temperature superconductor
Hsu, C. H.; Yan, Y; Hadeler, O. et al

in IEEE Transactions on Applied Superconductivity (2012), 22(3), 7800404

Superconductors are known for the ability to trap magnetic field. A thermally actuated magnetization (TAM) flux pump is a system that utilizes the thermal material to generate multiple small magnetic ... [more ▼]

Superconductors are known for the ability to trap magnetic field. A thermally actuated magnetization (TAM) flux pump is a system that utilizes the thermal material to generate multiple small magnetic pulses resulting in a high magnetization accumulated in the superconductor. Ferrites are a good thermal material candidate for the future TAM flux pumps because the relative permeability of ferrite changes significantly with temperature, particularly around the Curie temperature. Several soft ferrites have been specially synthesized to reduce the cost and improve the efficiency of the TAM flux pump. Various ferrite compositions have been tested under a temperature variation ranging from 77K to 300K. The experimental results of the synthesized soft ferrites-Cu0.3Zn0.7Ti0.04Fe1.96O4, including the Curie temperature, magnetic relative permeability and the volume magnetization (emu/cm3), are presented in this paper. The results are compared with original thermal material, gadolinium, used in the TAM flux pump system.-Cu0.3Zn0.7Ti0.04Fe1.96O4 holds superior characteristics and is believed to be a suitable material for next generation TAM flux pump. © 2011 IEEE. [less ▲]

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See detailHydrological behavior of a forested catena
Deraedt, Deborah ULg; Ridremont, François ULg; Claessens, Hugues ULg et al

in Geophysical Research Abstracts (2012), 14

At the time when the significance of water becomes more than obvious, we realize the utility of models that describe hydrological phenomena and that permit the optimization of water management. The soil ... [more ▼]

At the time when the significance of water becomes more than obvious, we realize the utility of models that describe hydrological phenomena and that permit the optimization of water management. The soil properties, as they have an influence both on hydrology and on plant development, are an element really essential in this type of model. But, as for tree characteristics, these properties are spatially and temporally variable. Therefore this research will specially focus on the case of forested slopes. The study will be divided into three parts. The first will characterize the vertical and the horizontal heterogeneity of the structural and hydrodynamic properties of soil. To do this, in addition to the analysis of the soil sampled along the slope, moisture sensors will be installed on different places on a slope and on different depths. For the greatest part it will be capacitive sensors whose values will be confirmed by TDR sensors. Each sensor will be inserted to cover the largest pedological and topographic variability. The second part of the study will permit to characterize the water flux repartition into the horizons down the slope. We will therefore apply a dye to surface on the top of the slope. The bottom of the slope will be equipped with an experimental system which collects water for each soil layer. The third parts will deal with the forest stand heterogeneity along the slope. We will measure characteristics such as tree height, roots repartition, stem circumference and also for different periods of the year, leaf area index (LAI). At the end of the research, we will measure tree rings for a dendrochronolocical study. The collected data will be analyzed to determine the slope effects on the soil properties, on the water flux distribution into the soil layer and on the tree characteristics. Afterwards the relations and the interactions can be conceptualized and introduced into a physical hydrological model. The studied slope is located on the Houille watershed in the West of the Belgian Ardenne. The site is situated under a Douglas fir cover (Pseudotsuga menziesii (MIRB.) FRANCO). It is about 170 meters long with an average slope of 25%. There are only few studies that attempt to connect physical models and the tree growth at the slope scale, leaving a vast untapped investigation area in the hydrological modelling. The study of this variability would afford possibility to improve hydrological models. From the point of view of the climate change, such a model would e.g. determine the best adapted species to each forest site. [less ▲]

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See detailAdaptation des traitements antibiotiques après 72 heures lors d'infection acquise en USI
LEGRAIN, Caroline; VERCHEVAL, Christelle ULg; NYS, Monique ULg et al

in Réanimation (2012), 22(Suppl 2), 250033

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See detailThe diagnostic value of equine rectal and duodenal biopsies.
Tossens, Morgane; Borde, Laura ULg; Amory, Hélène ULg et al

in Journal of Veterinary Internal Medicine (2012), 26(2), 430-431

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See detailModellierung von Ersatztreibstoffen mit Realkomponenten
Mair-Zelenka, P; Wallek, T; Reiter, A et al

in Chemie Ingenieur Technik (2012), 84(8), 1392

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See detailThe elusiveness of multifragmentation footprints in 1-GeV proton-nucleus reactions
Mancusi, D; Boudard, A; Cugnon, Joseph ULg et al

in EPJ Web of Conferences (2012), 31

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See detailImmunostimulatory and adjuvant properties of synthetic oligofuranosides
Chlubnova, Ilona ULg; Filipp, Dominik; Oujezdska, Jana et al

in Immunology (2012)

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See detailStatus on the transversity parton distribution: the dihadron fragmentation functions way
Courtoy, Aurore ULg; Bacchetta, Alessandro; Radici, Marco

in PoS - Proceedings of Science (2012), QNP2012

We report on the extraction of dihadron fragmentation functions (DiFF) from the semiinclusive production of two hadron pairs in back-to-back jets in e+e- annihilation. A nonzero asymmetry in the ... [more ▼]

We report on the extraction of dihadron fragmentation functions (DiFF) from the semiinclusive production of two hadron pairs in back-to-back jets in e+e- annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite π+π− pairs is related to the transverse polarization of fragmenting quarks through a significant polarized DiFF. A combined analysis of this asymmetry and the spin asymmetry in the SIDIS process ep↑→e′(π+π−)X has led to the first extraction of the u and d-flavor transversity parton distribution function in the framework of collinear factorization. [less ▲]

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See detailDark Matter in a SUSY Left-Right Model
Vicente, Avelino ULg

in Journal of Physics: Conference Series (2012), 375

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See detailLa bone sialoproteine: un facteur clé dans la pathogénie de l'arthrose
Pesesse, Laurence ULg; Sanchez, Christelle ULg; Delcour, Jean-Pierre et al

in Revue du Rhumatisme (2012), 79(S), 106

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See detailSystematische Bewertung von Syntheserouten ausgehend von alternativen Kohlen-stoffquellen mithilfe von Exergiebilanzen
Frenzel, P E; Hillerbrand, Rafaela; Pfennig, Andreas ULg

in Chemie Ingenieur Technik (2012), 84(8), 1306

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See detailDo all negative images similarly retain attention? Time course of attentional disengagement from disgust- and fear-evoking stimuli.
Devue, Christel ULg; Van Hooff, Johanna; Vieweg, Paula et al

in Perception (2012), 41(ECVP abstract suppl.), 133

While disgust and fear are both negative emotions, they are characterized by different physiology and action tendencies, which might in turn lead to different attentional biases. However, the potential ... [more ▼]

While disgust and fear are both negative emotions, they are characterized by different physiology and action tendencies, which might in turn lead to different attentional biases. However, the potential disgusting aspect of threatening stimuli has somehow been neglected which might contribute to discrepancies in the literature. The goal of this study was to examine whether fear- and disgust-evoking images produce different attentional disengagement patterns. We pre-selected IAPS images according to their disgusting, frightening, or neutral character and presented them as central cues while participants had to identify a target letter briefly appearing around them. To investigate the time course of disengagement from those central images, we used 4 different cue-target intervals (200, 500, 800 and 1100 ms). Reaction times were significantly longer with the disgust-evoking images than with neutral- and fear-evoking images at the 200 ms interval only. This suggests that only disgust- and not fear-related images hold participants'attention for longer. This might be related to the need to perform a more comprehensive risk-assessment of disgust-evoking pictures. These results have important implications for future emotion-attention research as they indicate that a more careful selection of stimulus materials that goes beyond the dimensions of valence and arousal is needed. [less ▲]

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See detailThinking about Ikhtilâf (“Difference”): The Political Construction of Difference in Islamic Context
Nachi, Mohamed ULg

in History of the Present (2012), 2(1/Spring), 52-70

A partir de l'idée d'Ikhtilâf (différence/divergence), fondamentale dans la culture et les sociétés islamiques, cette étude cherche àapporter des réponses nouvelles à la question de la légitimation des ... [more ▼]

A partir de l'idée d'Ikhtilâf (différence/divergence), fondamentale dans la culture et les sociétés islamiques, cette étude cherche àapporter des réponses nouvelles à la question de la légitimation des différences politique, religieuse, culturelle, etc. et, au-delà, de la légitimation du pouvoir et de la souverainté politique dans des sociétés islamiques en mutation. [less ▲]

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See detailCompression test for metal characterization using digital image correlation and inverse modeling
Tuninetti Vásquez, Victor ULg; Gilles, Gaëtan ULg; Péron-Lührs, Vincent ULg et al

in Procedia IUTAM (2012)

In the case of sheet metal characterization, compression tests at normal direction of the sheet can be done by means of the layer compression test. Circular cylinder specimens are commonly used for ... [more ▼]

In the case of sheet metal characterization, compression tests at normal direction of the sheet can be done by means of the layer compression test. Circular cylinder specimens are commonly used for compression test but the complicated layer alignment is time consuming and may induce a wrong anisotropy characterization. This final goal explains the interest of working on elliptic shape. In this article, an elliptical cylinder specimen is proposed and tested for bulk Titanium alloy. Full-field optical technique (3D Digital Image Correlation) is used for displacement measurements by means of three camera systems (Limess), which allows out-of-plane displacement/strain fields on around 300° of the specimen. The use of this technique easily provides accurate barreling profile used to compute Coulomb friction coefficient by using inverse method. [less ▲]

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See detailMemory impairments in dementia: Which memory and how does it fail?
Salmon, Eric ULg; Collette, Fabienne ULg; Genon, Sarah ULg et al

in Frontiers in Human Neuroscience (2012)

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See detailThe Strong Coupling Constant from Hadron Structure Phenomenology
Courtoy, Aurore ULg; Liuti, Simonetta

in International Journal of Modern Physics Conference Series (2012)

We present recent developments on the role of the running coupling constant at the intersection of perturbative and nonperturbative QCD. A number of experiments show a smooth transition from small to ... [more ▼]

We present recent developments on the role of the running coupling constant at the intersection of perturbative and nonperturbative QCD. A number of experiments show a smooth transition from small to large scales given by the four-momentum transfer in the reactions. This is at variance with perturbative QCD where the running coupling constant becomes infinite when the scale equals ΛQCD. Approaches using an effective coupling constant could help interpret the opposite trend of data as compared to standard perturbative QCD predictions. We give an overview of the role of the coupling constant in the procedure to match nonperturbative hadronic model to perturbative QCD and we propose an extraction of an effective coupling constant from inclusive electron proton scattering data at large Bjorken x. [less ▲]

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See detailAssessment of the risk of dermal exposure to pesticide during treatment with a back-pack sprayer in the presence and absence of vegetation
Kadri, Z.; Sylla, S.; Lebeau, Frédéric ULg et al

in Communications in Agricultural and Applied Biological Sciences (2012), 77(7), 415-422

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See detailAsphalt concrete with fly ashes of different sources as filler replacement
Stroeven, Piet; He, Huan ULg; Huu Hanh, Pham

in Key Engineering Materials [=KEM] (2012), 517

Paper presents and discusses data obtained in a testing program on the replacement of limestone powder in asphalt concretes by fly ashes. This would combine economic, environmental and technical benefits ... [more ▼]

Paper presents and discusses data obtained in a testing program on the replacement of limestone powder in asphalt concretes by fly ashes. This would combine economic, environmental and technical benefits. The finest fly ash of Vietnamese origin scored best. This is proposed due to the gap-graded design of the particulate mixture of coarse crushed rock fractions, fine fluvial sand and the mineral admixture. The test program encompassed Marshall tests, creep tests and splitting tensile tests. [less ▲]

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See detailUn obstacle épistémologique comme trait d'union des travaux d'un laboratoire de didactique des mathématiques
Schneider-Gilot, Marguerite ULg

in Actes du séminaire national de didactique des mathématiques (2012)

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See detailBone sialoprotein: a key mediator of the angiogenic activity of hypertrophic osteoarthritic chondrocytes
Pesesse, Laurence ULg; Sanchez, Christelle ULg; Baudouin, Caroline et al

in Osteoarthritis and Cartilage (2012), 20(S), 122-123

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See detailParathyroid hormone but not bisphosphonate therapy interferes with the local mechanoregulatory mechanism in trabecular bone
Schulte, F. A.; Weigt, C.; Ruffoni, Davide ULg et al

in BONE (2012), 50(1), 40-40

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See detailGeometrieoptimierung von gerührten Extraktionskolonnen
Buchbender, Florian; Pfennig, Andreas ULg

in Chemie Ingenieur Technik (2012), 84(8), 1274

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See detailRapamycin Prevents Experimental Sclerodermatous Chronic Graft-versus-Host Disease in mice
Belle, Ludovic ULg; Binsfeld, Marilène ULg; DUBOIS, Sophie ULg et al

in Belgian Journal of Hematology (2012), Abstracts book(Supplement of 27th General Meeting of the Belgian Hematological Society), 14

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See detailDo you sound or look as old as you are? A study of age estimation in young and older adults
Moyse, Evelyne ULg; Beaufort, Aline ULg; Brédart, Serge ULg

in Perception (2012), 41(supplement), 117

Studies on age estimation usually indicated that people are fairly accurate at estimating the age of a person from her/his face or from her/his voice (with an absolute difference of five and ten years ... [more ▼]

Studies on age estimation usually indicated that people are fairly accurate at estimating the age of a person from her/his face or from her/his voice (with an absolute difference of five and ten years respectively) [e.g. Amilon et al., 2000, in: Speaker Classification II. Lectures Notes in Artificial Intelligence, C Müller, Berlin, Springer-Verlag]. However studies showed also that performance depends on the age of participants and the age of stimuli [Rhodes, 2009, Applied Cognitive Psychology, 23, 1-12; Braun, 1996, Forensic Linguistics, 3, 65-73]. The aim of the present study is to compare age estimation performance from faces and voices by using an experimental design in which the age of participants (young vs older), the age of stimuli (young vs older) and the stimulus domain (face vs voice) were crossed. Overall, the age of faces was more accurately estimated than the age of voices. Moreover performance of age estimation was better for young stimuli than for older stimuli. Finally, young participants made smaller absolute errors than older participants. However there is no difference between young and older participants when estimating the age of older stimuli. [less ▲]

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See detailAn experimental approach for synthesis of Fe-Al-O multiferroic fibrous material
Starbov, N; Starbova, K; Vanderbemden, Philippe ULg et al

in Journal of Physics: Conference Series (2012), 398

Basic principles of the electro-hydrodynamics are applied for synthesis of solid state Fe-Al-O multi-ferroic fibrous material. For that purpose stable blend spinning solutions comprised of a high ... [more ▼]

Basic principles of the electro-hydrodynamics are applied for synthesis of solid state Fe-Al-O multi-ferroic fibrous material. For that purpose stable blend spinning solutions comprised of a high molecular assisting organic polymer and salts of iron and aluminum are developed. These solutions are tested under electrospinning conditions and synthesis of homogeneous as spun non-woven mats characterized by fibre mean diameters in the microand nano-size range is successfully demonstrated. Multi-step thermal procedure is applied for the consecutive solvent evaporation, polymer pyrolisis and final fibre calcination. Electronoptical imaging technique and XRD are applied for revealing the sample morphology and the phase composition correspondingly. The results obtained outline the wide possibilities for fabrication of multi-ferroics fibrous nano-materials on the basis of Fe-Al-O. [less ▲]

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See detailComputer-Aided Tissue Engineering of the Anterior Cruciate Ligament
Laurent, Cédric ULg

in Journal of Biomechanics (2012)

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See detailThe influence of cognitive reserve on inter-individual variability in resting-state cerebral metabolism in normal aging
Bastin, Christine ULg; Salmon, Eric ULg; Bahri, Mohamed Ali ULg et al

in Alzheimer's & Dementia : The Journal of the Alzheimer's Association (2012), 8(4), 80-81

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See detailParticle packing density and limestone fillers for more sustainable cement
He, Huan ULg; Courard, Luc ULg; Pirard, Eric ULg

in Key Engineering Materials [=KEM] (2012), 517

Cement blending with mineral admixtures, especially with byproduct or waste product powder, can effectively reduce consumption of cement and promote the ecology. Recently, an innovative concept was ... [more ▼]

Cement blending with mineral admixtures, especially with byproduct or waste product powder, can effectively reduce consumption of cement and promote the ecology. Recently, an innovative concept was proposed to replace of “coarse” cement grains by the inert fillers for sustainable cement in the low w/c concrete cement. As a basic mechanism, particle packing plays an important role in such replacement or blending. In the first part of study, the paper discusses the particle packing aspect of cement grains, limestone filler (LF) and LF blended cement. The new developed wet packing method and a dry packing method are proposed for the evaluation purpose. The paper presents results of packing tests with the influences of PSD, cement type, vibration, mixing, blending proportions, etc. The advantages and limitations of two packing methods are also discussed in this paper. [less ▲]

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See detailLight impact on cognitive brain function depends on circadian phase, sleep pressure and PER3 polymorphism
Vandewalle, Gilles ULg

in Journal of Sleep Research (2012), 21(Suppl. 1),

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See detailVariability of insulin sensitivity during the first 4 days of critical illness
Pretty, Christopher ULg; Le Compte, A; Chase, JG et al

in Critical Care (2012), 16 (Suppl 1)

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See detailWissensbasierte Designmethode zur Auslegung von Feststoffextraktoren auf Basis von Laborversuchen
Bol, J B; Pfennig, Andreas ULg

in Chemie Ingenieur Technik (2012), 84(8), 1349

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See detailTreatment of postmenopausal women with osteoporosis for six years with denosumab : three-year results from the freedom extension
Chapurlat, R; Papapoulos, S; Brown, JP et al

in Annals of the Rheumatic Diseases (2012), 71(3), 588

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See detailWhat is the Contribution of Host-Derived CMV Immunity after Allogeneic Transplantation following Non-Myeloablative Conditioning?
MENTEN, Catherine ULg; Castermans, E.; Hannon, Muriel ULg et al

in Haematologica (2012), 97(Supplement 1), 720

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See detailItem familiarity and controlled associative retrieval in Alzheimer’s disease: An fMRI study.
Genon, Sarah ULg; Collette, Fabienne ULg; Feyers, Dorothée ULg et al

in Frontiers in Human Neuroscience (2012)

Alzheimer’s disease (AD) is characterised by altered recollection function, with impaired controlled retrieval of associations. In contrast, familiarity-based memory for individual items may sometimes be ... [more ▼]

Alzheimer’s disease (AD) is characterised by altered recollection function, with impaired controlled retrieval of associations. In contrast, familiarity-based memory for individual items may sometimes be preserved in the early stages of the disease. This is the first study that directly examines whole brain regional activity during one core aspect of the recollection function: associative controlled episodic retrieval (CER), contrasted to item familiarity in AD patients. Cerebral activity related to associative CER and item familiarity in AD patients and healthy controls (HC) was measured with functional magnetic resonance imaging during a word-pair recognition task to which the process dissociation procedure was applied. Some patients had null CER estimates (AD–), whereas others did show some CER abilities (AD+), although significantly less than HC. In contrast, familiarity estimates were equivalent in the three groups. In AD+, as in controls, associative CER activated the inferior precuneus/posterior cingulate cortex (PCC). However, during associative CER, functional connection between this region and the hippocampus, the inferior parietal and dorsolateral prefrontal cortex (DLPFC) was significantly higher in HC than in AD+. In all three groups, item familiarity was related to activation along the intraparietal sulcus (IPS). In conclusion, whereas the preserved automatic detection of an old item (without retrieval of accurate word association) is related to parietal activation centred on the IPS, the inferior precuneus/PCC supports associative CER ability in AD patients, as in HC. However, AD patients have deficient functional connectivity during associative CER, suggesting that the residual recollection function in these patients might be impoverished by the lack of some recollection-related aspects such as autonoetic quality, episodic details and verification. [less ▲]

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See detailStrontium ranelate in knee osteoarthritis trial (SEKOIA) : a structural and symptomatic efficacy
Reginster, Jean-Yves ULg; Chapurlat, R; Christiansen, C et al

in Arthritis and Rheumatism (2012), 64(S10), 681

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See detailRelationship between changes in bone mineral density and incidence of fracture with 6 years of Denosumab treatment
Bolognese, MA; Miller, PD; Reginster, Jean-Yves ULg et al

in Arthritis and Rheumatism (2012), 64(S10), 847

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See detailLes grottes d'Azé (Saône-et-Loire, France): de la roche altérée aux sédiments
Barriquand, Lionel; Barriquand, Johan; Baele, Jean-Marc et al

in Karstologia (2012), 59

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See detailDiffusion of Ag dimer on Cu (110) by dissociation-reassociation and concerted jump processes
Sbiaai, K.; Boughaleb, Y.; Raty, Jean-Yves ULg et al

in International Conference on Transparent Optical Networks (2012)

In this work we investigate the diffusion of Ag dimer on Cu(110) surface by molecular dynamics simulation based on semi-empirical many-body potentials derived from the embedded atom method. The ... [more ▼]

In this work we investigate the diffusion of Ag dimer on Cu(110) surface by molecular dynamics simulation based on semi-empirical many-body potentials derived from the embedded atom method. The dissociation-reassociation process is predicted to be dominant in static regime and this is confirmed by the dynamic investigation. A good agreement is found between static activation barrier and dynamic potential barrier. © 2012 IEEE. [less ▲]

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See detailMethodological approaches to 3D pore structure exploration
Stroeven, Piet; Le, L.B. Nghi; He, Huan ULg

in Key Engineering Materials [=KEM] (2012), 517

About 6% of global CO2 emissions are due to cement production. Blending of Portland cement with a significant fraction of mineral admixture could therefore be instrumental in reducing such emissions. Use ... [more ▼]

About 6% of global CO2 emissions are due to cement production. Blending of Portland cement with a significant fraction of mineral admixture could therefore be instrumental in reducing such emissions. Use of an admixture of vegetable origin such as rice husk as will additionally contribute to waste management and its incineration produces energy. This paper will stress the importance of properly designing such blends. Preferably gap-graded concepts should be employed, since blending efficiency in terms of strength development is promoted as shown in earlier publications. The paper therefore only briefly covers these aspects. Assessment of this blending concept on durability of cementitious materials constitutes a far more complicated problem. This requires careful porosimetry. Mostly, this problem is approached by MIP or by quantitative image analysis. Both can provide 3D information, although that of MIP is generally significantly biased. Quantitative image analysis is however time-consuming and laborious, and thus expensive. Moreover, it does not provide information on continuity of pores. Present day computer facilities offer therefore a better alternative. When using a proper DEM system, the concrete can be simulated in a realistic way. The paper describes new methods for investigating the pore structure in virtual concrete and presents some data on pure cement and blended cement. Differences will have impact on durability risks. [less ▲]

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See detailMolecular evolution of the CYTH superfamily of proteins
Bettendorff, Lucien ULg; Delvaux, David ULg; Kohn, Grégory ULg et al

in FEBS Journal (2012), 279(Suppl. s1), 438

Molecular evolution of the CYTH superfamily of proteins L. Bettendorff, D. Delvaux, G. Kohn, P. Wins, B. Lakaye GIGA-Neurosciences, University of Liège, Belgium The CYTH superfamily of proteins was named ... [more ▼]

Molecular evolution of the CYTH superfamily of proteins L. Bettendorff, D. Delvaux, G. Kohn, P. Wins, B. Lakaye GIGA-Neurosciences, University of Liège, Belgium The CYTH superfamily of proteins was named after the two founding members, the CYaB adenylyl cyclase from Aeromonas hydrophila and the human 25-kDa THiamine triphosphatase (ThTPase). Members of this superfamily of proteins exist in all organisms including bacteria, archaea, plants and animals (except in birds) and can be traced back to the Last Universal Common Ancestor. They are characterized by a consensus sequence including several charged residues involved in divalent cation and triphosphate binding. Indeed, all members of the CYTH family that are characterized act on triphosphate derivatives and require at least one divalent cation for catalysis. The Nitrosomonas europaea (1) and E.coli CYTH proteins are specific inorganic triphosphatases. We propose that inorganic triphosphate (PPPi), the most simple triphosphate compound that can be imagined, is the primitive substrate of CYTH proteins. Other enzyme activities such as adenylate cyclase (in A. hydrophila), mRNA triphosphatase (in fungi and protozoans) and ThTPase (in metazoans) activities are secondary acquisitions. We show that ThTPase activity is not limited to mammals, but Sea anemone and Zebrafish CYTH proteins are already specific ThTPases and the acquisition of this enzyme activity is linked to the presence of a Trp (W53 in mammalian ThTPases) residue involved in the binding of the thiazole heterocycle of the thiamine molecule. The importance of W53 for the specificity of mammalian ThTPases is confirmed by site-directed mutagenesis. Furthermore, we propose a conserved catalytic mechanism between inorganic triphosphatases and ThTPases, based on a catalytic dyad comprising a Lys and a Tyr residue, explaining the alkaline pH optimum of CYTH proteins. (1) Delvaux et al. J. Biol. Chem 286 (2011) 34023-35 [less ▲]

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See detailBayesian integration of external information into the single step approach for genomically enhanced prediction of breeding values
Vandenplas, Jérémie ULg; Misztal, Ignacy; Faux, Pierre ULg et al

in Journal of Dairy Science (2012), 95(Supplement 2),

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See detailFrom Food Crisis to Analytical Strategies
Focant, Jean-François ULg

in Organohalogen Compounds (2012), 74

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See detailNominal group technique to prioritize preferences for medication attributes from the patients’ perspective : the case of osteoporosis
Hiligsmann, Mickaël ULg; Van Durme, C; Geusens, P et al

in Annals of the Rheumatic Diseases (2012), 71(3), 597

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See detailInfluence of the shielding currents lengthscale and anisotropy effects on the magnetic flux profiles of high-temperature superconductors
Vanderbemden, Philippe ULg; Lovchinov, Vassil

in Journal of Physics: Conference Series (2012), 398

The so-called "magnetic flux profile" AC inductive technique is a powerful method for determining the critical current density Jc of bulk superconductors. In this work we aim at reporting analytical ... [more ▼]

The so-called "magnetic flux profile" AC inductive technique is a powerful method for determining the critical current density Jc of bulk superconductors. In this work we aim at reporting analytical expressions for magnetic flux profiles of superconducting rectangular samples exhibiting a critical current density anisotropy. The results are used for examining the error resulting from approximating a rectangular cross-section by an "infinite cylinder" or "infinite slab" geometry. It is found that such approximations can lead to an artificial curvature of the flux profiles and errors of 10%–20% in the determination of Jc. Next, the effects of how planar defects (cracks, platelet boundaries,...) affect the magnetic flux profile signal are discussed. It is found that the magnetic flux profiles are much sensitive to the lengthscale of shielding currents, thereby providing means of investigation of the typical size of induced current loops in bulk superconductors. Finally some illustrative flux profile data measured on a bulk, large grain melt-processed YBCO single domain exhibiting Jc anisotropy are presented and discussed in relation with theoretical predictions. [less ▲]

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See detailIsoform 111 of vascular endothelial growth factor (VEGF111) improves angiogenesis of ovarian tissue xenotransplantation
Labied, Soraya ULg; Delforge, Yves ULg; Blacher, Silvia ULg et al

in Journal of Assisted Reproduction & Genetics (2012), 28(11), 1009

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See detailRecycling von Metallen aus Lithiumionenbatterien
Noll, H; Pfennig, Andreas ULg; Siebenhofer, M

in Chemie Ingenieur Technik (2012), 84(8), 1381

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See detailRespiratory system elastance monitoring during PEEP titration
Chiew, YS; Chase, JG; Shaw, GM et al

in Critical Care (2012), 34 (Suppl 1)

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See detailEvidence for Expansion of Host-derived CMV-specific CD8+ T cells after Allogeneic Transplantation with Non-Myeloablative Conditioning
MENTEN, Catherine ULg; Castermans, E.; Hannon, Muriel ULg et al

in Belgian Journal of Hematology (2012), Abstracts book(Supplement of 27th General Meeting of the Belgian Hematological Society), 16

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See detailEffects of environmental factors on yield and milking number in dairy cows milked by an automatic system located in pasture
Dufrasne, Isabelle ULg; Robaye, Vincent ULg; Knapp, Emilie ULg et al

in Grassland Science (2012), 17

A herd of 45 Holstein dairy cows was milked with an automatic milking system (AMS) located on a permanent pasture. The cows grazed from 22.06.2010 until 20.10.2010 on a rotational system. They were ... [more ▼]

A herd of 45 Holstein dairy cows was milked with an automatic milking system (AMS) located on a permanent pasture. The cows grazed from 22.06.2010 until 20.10.2010 on a rotational system. They were fetched twice a day to the AMS but they could also reach it freely. The sward height was measured at the entry and exit of each paddock. Data about daily milk yield and milking number were analysed according to a GLM including the effect of animal, days in paddock, distance between AMS and paddock, rotation cycle number and complementation. [less ▲]

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See detailThe C2-hydrocarbon link in cometary comae
Weiler, M.; Bockelée-Morvan, D.; Hutsemekers, Damien ULg et al

in EPSC Abstract 2012 (2012)

Comet 8P/Tuttle was the target of an ESO multiwavelength observing campaign in 2008. Observations of the spatial distribution of C2 and C3 were obtained, as well as simultaneous direct detections of the ... [more ▼]

Comet 8P/Tuttle was the target of an ESO multiwavelength observing campaign in 2008. Observations of the spatial distribution of C2 and C3 were obtained, as well as simultaneous direct detections of the C2 parent species C2H2 and C2H6. We combine these observations to investigate the origin of cometary C2. The observed C2 column densities are inconsistent with a production of C2 from C2H2, C2H6, and C3. Based on a photochemical model, we quantitatively discuss the influence of further potential C2 parent species. The assumption of C4H2 as an additional C2 parent species in comet 8P/Tuttle provides the best explanation for the observed C2 column densities. [less ▲]

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See detailThe Casimir Effect and the Vacuum Energy: Duality in the Physical Interpretation
Cugnon, Joseph ULg

in Few-Body Systems (2012), 53(1-2), 181-188

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See detailL'injection intra-articulaire d'un biomatériau à base de chitosane prévient la progression de l'arthrose expérimentale induite par section du ligament croisé chez le lapin
Oprenyeszk, Frédéric ULg; Chausson, Mickael; Maquet, Véronique et al

in Revue du Rhumatisme (2012), 79(1), 108-109

Introduction La viscosupplémentation par injection intra-articulaire d’acide hyaluronique est recommandée dans le traitement de l’arthrose. Cependant, l’acide hyaluronique a une faible rémanence ... [more ▼]

Introduction La viscosupplémentation par injection intra-articulaire d’acide hyaluronique est recommandée dans le traitement de l’arthrose. Cependant, l’acide hyaluronique a une faible rémanence articulaire, ce qui limite son efficacité dans le temps. Dans ce travail, nous avons testé un nouveau biomatériau formé par le mélange de billes d’alginate-chitosane (AC) associées à un hydrogel visqueux synthétisé au départ de chitosane (H). Ce nouveau biomatériau breveté offre de nombreux avantages :1) biocompatible et non toxique, 2) composé exclusivement au départ de biopolymères d’origine non animale (chitosane et alginate), 3) les billes qui le composent sont élastiques, déformables et exercent un effet anti-inflammatoire et anti-catabolique sur les chondrocytes. Matériels et Méthodes L’arthrose a été induite chez le lapin HYLA albinos par la section du ligament croisé antérieur (LCA). Une semaine après l’intervention chirurgicale, les lapins ont été répartis dans trois groupes expérimentaux et ont bénéficié d’une injection intra-articulaire (900µl) des traitements suivants : billes AC associées à un hydrogel H (Groupe I ; n=7) ; hydrogel H seul (Groupe II ; n = 7) ; liquide physiologique (Groupe III ; n = 7). Des radiographies standards du genou en extension ont été réalisées avant l’intervention et pendant six semaines après l’intervention à raison d’une radiographie par semaine. Après 6 semaines de traitement, les animaux ont été euthanasiés et l’articulation prélevée. Une étude macroscopique du cartilage coloré à l’encre de Chine a été réalisée. Des coupes histologiques colorées à la Safranine-O/fast green provenant des zones portantes dans chaque compartiment ont été évaluées selon le score histologique de l’OARSI (Laverty et al., 2010). Résultats L’analyse des clichés radiologiques montrait une diminution significative (p<0,05) des signes radiologiques d’arthrose après 6 semaines dans le groupe I (billes AC + hydrogel H; 1,57 ± 0,2) en comparaison avec les groupe II (hydrogel H; 2,16 ± 0,47) et III (liquide physiologique ; 3,0 ± 0,43). La macroscopie révélait une tendance à l’amélioration de la taille et du grade des lésions dans le groupe I. La sévérité des lésions histologiques étaient significativement diminuée dans le groupe I (10,98 ± 0,72) par rapport au groupe II (14,43 ± 0,57 ; p<0,01) et au groupe III (14,79 ± 0,62 ; p<0,001). Cet effet était visible au niveau des condyles fémoraux et des plateaux tibiaux. Discussion L’injection intra-articulaire du mélange bille AC + hydrogel H est plus efficace que l’hydrogel H seul, ce qui suggère que les billes AC jouent un rôle dans l’efficacité de ce nouveau traitement. Cette nouvelle formulation pourrait être utilisée pour le traitement par viscosupplémentation de l’arthrose chez l’homme. Conclusion Le nouveau biomatériau formé par le mélange de billes AC et d’un hydrogel visqueux à base de chitosane prévient la progression de l’arthrose chez le lapin. [less ▲]

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See detailUS-guided versus blind lumbar puncture in dogs - A post- mortem study.
Etienne, Anne-Laure ULg; Massart, Laurent; Busoni, Valeria ULg

in Veterinary Radiology & Ultrasound (2012)

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See detailDendrochronologie en région bruxelloise et à Spa par l'Université de Liège (CEA) en 2011
Hoffsummer, Patrick ULg; Weitz, Armelle ULg

in Archaeologia Mediaevalis (2012), 35

This is a summary of different dendrochronological analysis of dendro lab in Ulg in cooperation with responsables of Brussels and Walloon heritage during 2011 on vernacular architecture and hisotrical ... [more ▼]

This is a summary of different dendrochronological analysis of dendro lab in Ulg in cooperation with responsables of Brussels and Walloon heritage during 2011 on vernacular architecture and hisotrical monuments [less ▲]

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See detailEtude de l'imprégnation d'une population générale belge en bisphénol A, triclosan et 4-nonylphénol
PIRARD, Catherine ULg; SAGOT, Clémence ULg; DEVILLE, Marine ULg et al

in Annales de Toxicologie Analytique (2012), 24(4),

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See detailGenetics of the mid-infrared prediction of lactoferrin content in milk for Holstein first-parity cows
Bastin, Catherine ULg; Leclercq, Gil ULg; Soyeurt, Hélène ULg et al

in International Journal of Dairy Science (2012), 95, Suppl. 2

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See detailEffect of aerobic training on cardiorespiratory fitness, gait, quality of life and psychometric outcomes in Parkinson’s disease patients
Demonceau, Marie ULg; Rodriguez de la Cruz, Carlos; Robert, Fanny et al

in Movement Disorders : Official Journal of the Movement Disorder Society (2012), 27(Suppl. 1), 113

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See detailA closed form solution of the two body problem in non-inertial reference frames
Condurache, Daniel; Martinusi, Vladimir ULg

in Advances in the Astronautical Sciences (2012), 143

A comprehensive analysis, together with the derivation of a closed form solution to the two-body problem in arbitrary non-inertial reference frames are made within the present work. By using an efficient ... [more ▼]

A comprehensive analysis, together with the derivation of a closed form solution to the two-body problem in arbitrary non-inertial reference frames are made within the present work. By using an efficient mathematical instrument, which is closely related to the attitude kinematics methods, the motion in the non-inertial reference frame is completely solved. The closed form solutions for the motion in the non-inertial frame, the motion of the mass center, and the relative motion are presented in the paper. Dynamical characteristics analogue to the linear momentum, angular momentum and total energy are introduced. In the general situation, these quantities may be determined as functions of time, and their derivation is presented within the paper. In the situation where the non-inertial frame has only a rotation motion, these quantities become first integrals in a larger sense, with respect to an adequately defined differentiation rule. [less ▲]

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See detailSeeking for the optimum retrieval strategy of methanol (CH3OH) from ground-based high-resolution FTIR solar observations recorded at the high-altitude Jungfraujoch station (46.5ºN)
Mahieu, Emmanuel ULg; Bader, Whitney ULg; Lejeune, Bernard ULg et al

in Geophysical Research Abstracts (2012), 14

Methanol (CH3OH) is a key organic compound in the Earth’s troposphere, with reported concentrations of the order of a few ppbv. It is indeed the second most abundant organic atmospheric compound after ... [more ▼]

Methanol (CH3OH) is a key organic compound in the Earth’s troposphere, with reported concentrations of the order of a few ppbv. It is indeed the second most abundant organic atmospheric compound after methane (Jacob et al., 2005). The same authors have estimated its lifetime to a few days. Natural sources of CH3OH include plant growth, oceans, decomposition of plant matter, oxidation of methane,. . . They are complemented by anthropogenic (from vehicles, industry) and biomass burning emissions. Oxidation by the hydroxyl radical is the main sink, leading to the formation of carbon monoxide (CO) and formaldehyde (H2CO) (Rinsland et al., 2009; Stavrakou et al., 2011, and references therein). The first retrievals of methanol from ground-based Fourier Transform Infrared (FTIR) spectra have been reported by Rinsland et al. (2009), using spectra recorded at Kitt Peak (31.9ºN) and a microwindow extending from 992 to 999 cm-1. Soon after, Stavrakou et al. (2011) used another spectral interval from 1029 to 1037 cm-1, for methanol retrievals at Reunion Island (21ºS). In both cases, lines of the strong nu8 band of CH3OH were adjusted, accounting for interferences by several isotopologues of ozone and by water vapor. In this contribution, we will present first retrievals of CH3OH from observations recorded at the high-altitude station of the Jungfraujoch (46.5ºN, 8ºE, 3580 m asl), with a Bruker 120HR spectrometer, in the framework of the Network for the Detection of Atmospheric Composition Change (NDACC, visit http://www.ndacc.org). We will implement existing retrieval approaches –and possibly additional one(s)– to determine which strategy is the most appropriate for our dry high-altitude site. If successful, a long-term CH3OH total column time series will be produced using the Jungfraujoch observational database, and we will perform preliminary investigations to characterize the seasonal and inter-annual variations of this species at northern mid-latitudes. [less ▲]

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See detailMultiscale Computational Modeling of a New Scaffold for Anterior Cruciate Ligament Tissue Engineering
Laurent, Cédric ULg

in Computer Methods in Biomechanics & Biomedical Engineering (2012)

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See detailComment programmer un système neuronal avec un langage et une conscience ?
Dubois, Daniel ULg

in Acta Europeana Systemica (2011, December 07), 1

This communication deals with the question to know if this is possible to program a neural system with a language and a consciousness. There are several levels and categories of language, by example ... [more ▼]

This communication deals with the question to know if this is possible to program a neural system with a language and a consciousness. There are several levels and categories of language, by example, verbal and non-verbal languages, signs language, etc. There are also several levels and categories of consciousness, by example, verbal consciousness, non-verbal selfconsciousness, and absence of consciousness with the a-consciousness. By a systemic approach, we extend the role of the brain to the whole neural ectoderm, including the nervous systems, the brainstem, the brain, and the skin that is the actual envelope of the brain to the environment. This paper will demonstrate that such a neural system can be programmed, on the basis of scientific research in experimental neurosciences and in artificial intelligence, extending de facto all the possibilities of learning of classical neural networks. [less ▲]

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See detailIntelligence Naturelle et Intelligence Artificielle
Dubois, Daniel ULg

in Acta Europeana Systemica (2011, December 07), 1

This article presents a systemic approach to the concept of natural intelligence with the aim of creating an artificial intelligence. Thus, the natural intelligence, human and nonhuman animals, is a ... [more ▼]

This article presents a systemic approach to the concept of natural intelligence with the aim of creating an artificial intelligence. Thus, the natural intelligence, human and nonhuman animals, is a function composed of faculties to know and understand. In addition, natural intelligence is inseparable from the structure, namely the organs of the brain and body. The temptation is to equip computer systems with artificial intelligence that should have a function composed of the same faculties as those encompassed in human intelligence. The artificial intelligence must also remain inseparable from the structure, namely the organs of an artificial brain and an artificial body. As a result, the artificial robot is the ideal structure to see the emergence of a strong artificial intelligence. Note that a weak artificial intelligence is developed on computer systems by a simulation program of intelligence. In this paper, neural programmable memories will be presented and simulated [less ▲]

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See detailPreliminary insight into seed effectiveness of western lowland gorilla (Gorilla g.gorilla)
Petre, Charles-Albert ULg; Tagg, Nikki; Beudels-Jamar, Roseline et al

in Primate Tidings (2011, December), 25

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See detailEvolution récente de l'incidence des fractures de hanche et de la consommation de médicaments anti-ostéoporotiques en Belgique
Hiligsmann, Mickaël ULg; Bruyère, Olivier ULg; Roberfroid, D. et al

in Revue du Rhumatisme (2011, December), 78(Suppl. 5), 43-44

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See detailPure species of grass discrimination with the help of hyperspectral imaging NIR
Dale, Laura ULg; Rotar, Ioan; Bogdan, Anca Dorina et al

in Agronomy Series of Scientific Research = Lucrari Stiintifice Seria Agronomie (2011, December), 54(2), 23-27

The possibilities to discriminate with hyperspectral imaging system, SWIR ImSpector N25E in grass mixtures of the pure species Festuca rubra L., Trifolium repens L., Agrostis capillaris L., Hieracium ... [more ▼]

The possibilities to discriminate with hyperspectral imaging system, SWIR ImSpector N25E in grass mixtures of the pure species Festuca rubra L., Trifolium repens L., Agrostis capillaris L., Hieracium aurantiacum L., Arnica montana L.was the objective of this study. All the samples were collected from natural meadows, from the National Apuseni Park, Apuseni Mountains, from Gârda area. The samples were naturally dried then prepared using the protocol for NIRS analyze. The model built with PLS–DA, was used to demonstrate wether the classes discrimination between pure species is possible or not. The goal of this study was to see in other images if the pure species are or are not recognized according to the spectral data base. The potential of using the Hyperspectral Imaging NIR (Camera NIR) to discriminate or to identify pure species was confirmed. For this technique the MatLab program was used .A percentage of more than 96% correct prediction for species discrimination was obtained. This study should drive to a more important point, which is to verify whether the toxic species are or are not used as food for animals in the natural meadows. The floristic composition of a meadow can be determined only if we have in the data base, dates for each identified species, as being part of the mix. [less ▲]

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See detailApproche par compétences et équité des apprentissages : un mariage impossible ? Etude de cas à propos de l'enseignement de l'histoire
Jadoulle, Jean-Louis ULg

in Puzzle (2011, December), n°30

L'objet de cette communication était de présenter les résultats d'une recherche exploratoire menée dans 5 classes de l'enseignement secondaire de transition en avril-mai 2011.

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See detailEvaluation of organic dust components cytotoxicity on thp1 monocytes-derived-macrophages using high content analysis
Ramery, Eve ULg; O'Brien, Peter James

in Veterinary Clinical Pathology (2011, December), 40(4), 583

Background: Organic dust contains pathogen associated molecular patterns (PAMPs) which can induce, following chronic exposure, significant airway diseases. Mononuclear phagocytes are key protecting cells ... [more ▼]

Background: Organic dust contains pathogen associated molecular patterns (PAMPs) which can induce, following chronic exposure, significant airway diseases. Mononuclear phagocytes are key protecting cells of the respiratory tract. Several studies have investigated the effects of PAMPs, and mainly endotoxins, on cytokine production. However the sub-lethal cytotoxicity of organic dust components on macrophages has not been tested yet. The novel technology of high content analysis (HCA) is already used to assess subclinical drug-induced toxicity. It combines the capabilities of flow cytometry, intracellular fluorescence probes, and image analysis and enables to perform rapid multiple analysis in large numbers of samples. Objectives: The purpose of the present study was, by using HCA, to investigate the cytotoxicity of the 3 major PAMPs contained in organic dust, ie. endotoxin (LPS), peptidoglycan (PGN) and β-glucans (zymosan) on THP-1 monocyte-derived macrophages. Methods: LPS was used at concentrations of 0.005, 0.01, 0.02, 0.05, 0.1 and 1 μg/ml; PGN and zymosan were used at concentrations of 1, 5, 10, 50, 100 and 500 μg/ml. Cells were exposed to PAMPs for 24 hours. In addition, the oxidative burst and the phagocytic capabilities of the cells were tested. Results: An overlap between PGN intrinsic fluorescence and red/far-red fluorescent dyes occurred, rendering the evaluation of some parameters impossible for PGN. LPS induced sub-lethal cytotoxicity at the lowest dose (from 10 ng/ml). However, the most spectacular changes occurred with zymosan. In addition, zymosan, but not LPS, induced phagosome maturation and oxidative burst. Conclusions: Given the fact that β-glucans can be up to 100 fold more concentrated in organic dust than LPS, these results suggest that β-glucans could play a major role in macrophages impairment following heavy dust exposure and will deserve further investigation in the near future. [less ▲]

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See detailContrôle de la pression artérielle (PA) et mesure de la rigidité artérielle (RA) chez des transplantés rénaux (TR) (étude EPARA)
Gellner, Karen; Saint-Remy, Annie ULg; BONVOISIN, Catherine ULg et al

in Archives des Maladies du Coeur et des Vaisseaux (2011, December), Hors série 3

EPARA a étudié le contrôle de la PA au cabinet de consultation et en dehors, et l'état de rigidité artérielle chez des transplantés rénaux stables, greffés depuis plus d'un an. Le contrôle de la PA est ... [more ▼]

EPARA a étudié le contrôle de la PA au cabinet de consultation et en dehors, et l'état de rigidité artérielle chez des transplantés rénaux stables, greffés depuis plus d'un an. Le contrôle de la PA est loin d‘être satisfaisant dans cette population de TR hypertendus, traîtés pour la plupart, particulièrement à domicile. L‘HTA masquée est fréquente, associée à un risque cardio-vasculaire élevé et une rigidité accrue des grosses artères. La PAS centrale est d‘autant plus élevée que la fonction rénale est mauvaise. Proposer de recourir systématiquement à des mesures ambulatoires de PA est hautement conseillé chez ce type de patients! [less ▲]

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See detailAssociation entre le contrôle de la pression artérielle et le rapport sodium/potassium urinaire chez les transplantés rénaux hypertendus
Saint-Remy, Annie ULg; SOMJA, Mélanie ULg; WEEKERS, Laurent ULg et al

in Archives des Maladies du Coeur et des Vaisseaux (2011, December), Hors série 3

Etude de la relation entre le contrôle de la pression artérielle (PA) mesurée en clinique et/ou à domicile chez des transplantés rénaux (Tr) hypertendus et l'excrétion urinaire du sodium (Na), potassium ... [more ▼]

Etude de la relation entre le contrôle de la pression artérielle (PA) mesurée en clinique et/ou à domicile chez des transplantés rénaux (Tr) hypertendus et l'excrétion urinaire du sodium (Na), potassium (K) et de leur rapport (Na/K urinaire et alimentaire) qui pourrait être un indice utile à prendre en compte dans la recherche d'un contrôle efficace de la PA chez les transplantés rénaux. [less ▲]

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See detailImagerie motrice après fracture de l'extrémité distale du radius
BERNARD, Bénédicte ULg; LHOEST, C.; Foidart-Dessalle, Marguerite ULg et al

in Chirurgie de la Main (2011, December), 30(6), 477

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See detailOne-dimensional time-dependent model of cardiac pacemaker activity generated by mechano-electric feedback in a thermo-electro-mechanical context
Collet, Arnaud ULg; Dauby, Pierre ULg

in Archives des Maladies du Coeur et des Vaisseaux. Pratique (2011, December), (Hors-série 3), 20

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See detailEffets de la pression partielle en hydrogène sur la production anaérobie de bioH2 par une bactérie chimiotrophe du genre Clostridium dans un nouveau réacteur à cylindre horizontal rotatif.
Beckers, Laurent ULg; Hiligsmann, Serge ULg; Hamilton, Christopher ULg et al

in Récents Progrès en Génie des Procédés (2011, December), 101

Hydrogen is widely considered as the most promising energetic carrier. At an industrial scale, steam reforming of methane is currently the major hydrogen producing process. But it may also be produced ... [more ▼]

Hydrogen is widely considered as the most promising energetic carrier. At an industrial scale, steam reforming of methane is currently the major hydrogen producing process. But it may also be produced from renewable biomass. Indeed, the fermentative production of hydrogen from renewable biomass using anaerobic bacteria could at least partially reduce our dependence on fossil fuel, decrease the carbon dioxide emissions and produce “green” energy. It offers the potential production of usable hydrogen from a variety of renewable resources such as carbohydrates wastes from agriculture or agro-food industries. This technology is based on anaerobic fermentation, called dark fermentation, by chemotrophic bacteria. The investigations carried out at CWBI involve selection and characterization of bacteria strains able to produce biohydrogen efficiently and with a wide range of substrate. The selected strains at the laboratory has been characterised as Clostridium sp. In order to produce hydrogen at high yields and production rates, the biotechnological process needs to be further optimized and efficient bioreactors must be designed. At CWBI, a new reactor called “horizontal rotating cylinder bioreactor” allows the production of biohydrogen from glucose with our Clostridium sp. strain with a high yield and production rate. This reactor, working continuously, has an internal volume of 2.3l but a working volume (liquid phase) of 300ml. Firstly, it enhances the hydrogen production rate by partially fixing the bacteria on the porous cylinder and thus increasing the cell concentration in the bioreactor. Secondly, the rotative cylinder enables efficient gas transfer (mainly hydrogen) from the liquid phase where it is produced by the bacteria. This is an important way to enhance hydrogen production yield by allowing the bacteria metabolism to shift in a fermentation type that produces more hydrogen. This was confirmed by increasing or decreasing the total pressure in the bioreactor and observing the influence of hydrogen production. The liquid to gas hydrogen transfer is possibly an important factor to enhance the biogas production. Our investigation confirmed this by testing different liquid to gas transfer condition in BHP test (batch fermentation in 250ml serum bottles).This was made either by decreasing total and partial pressure or by increasing the mixing state of the media. Our work concludes the importance of providing good liquid to gas transfers in the biohydrogen producing reactors to enhance the hydrogen production and reach higher yields and production rates. [less ▲]

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See detailExercise and epinephrine affect equine leukocytes distribution and gene expression in a distinct but closely related pattern
Ramery, Eve ULg; Schoenecker, Julie; Art, Tatiana ULg et al

in Veterinary Clinical Pathology (2011, December), 40(4), 583-584

Background: In horses-athletes, exercise has been shown to be an important regulator of immune cells and their functions, and catecholamines to be essential components of the physiological response to ... [more ▼]

Background: In horses-athletes, exercise has been shown to be an important regulator of immune cells and their functions, and catecholamines to be essential components of the physiological response to exercise. Objectives: The purpose of the present study was to compare immunological reactions and molecular events during exercise and epinephrine infusion. Methods: Horses were submitted to exercise or epinephrine infusion for 10 min. Blood samples were collected at T0, T5, Tl0, T20 and T40 min for biochemistry and haematology at T0 and T20 min for RNA extraction and microarray analysis. Results: In both protocols, packed-cell-volume and neutrophils peaked at T5 and T10, and returned to baseline at T40. Lymphocytes increased at T5 with exercise and at T20 with epinephrine and then remained high until the end of the protocols. Between T0 and T20, 55 probes, coding for 25 genes, and 19 probes, coding for 11 genes, were differentially regulated with epinephrine and exercise respectively (P<0.001). Ten of the genes over-expressed with epinephrine were related to inflammatory response and leukocytes trafficking and activation. Among the genes with the highest significant fold changes following exercise were FOS, DUSP-1 and CXCL1. FOS was over-expressed in both conditions. Among genes differentially regulated, Ingenuity software identified 3 overlapping functional networks with epinephrine and 1 functional network with exercise that overlapped the 3 epinephrine networks. Conclusions: Circulating leukocytes distribution and gene expression are rapidly affected following exercise and epinephrine infusion. Distinct but closely-related sets of gene activities were shown to be altered with exercise and epinephrine, with lesser changes in the immunological pattern with physical stress than epinephrine alone, arguing for compensatory mechanisms in exercise. [less ▲]

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See detailA student viewpoint on the aesthetics of publications, from the perspective of effectiveness
Merciadri, Luca ULg

in EuroBachoTeX 2011 proceedings (2011, November 28)

Writing a document is a difficult task because the writer needs to think about two different concepts: the appearence of the document, and its content. Both constitute the message the writer wants to ... [more ▼]

Writing a document is a difficult task because the writer needs to think about two different concepts: the appearence of the document, and its content. Both constitute the message the writer wants to transmit. We will here treat about the aesthetics of publications, from the perspective of effectiveness (which implies clarity). We begin by discussing some (but not all!) basic principles on how to write a good article, then treat about what LaTeX can help you to do to improve your document's content. We end with what you might do and do not about graphical \ae sthetism, and then end with some tips on how to ensure aesthetism, together with effectiveness, when writing an article. [less ▲]

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See detailHEAT RECOVERY SYSTEMS FOR PASSENGERS VEHICLES
Glavatskaya, Yulia ULg; Olivier, Gérard; Shonda, Osoko et al

in Scientific Bulletin, Automotive series = Buletin Ştiinţific, Seria Autovehicule Rutiere (2011, November 02)

is wasted through the cooling liquid and the exhaust gases. Thus, it would be possible to convert this wasted heat in order to improve the engine overall efficiency and reduce the fuel consumption of the ... [more ▼]

is wasted through the cooling liquid and the exhaust gases. Thus, it would be possible to convert this wasted heat in order to improve the engine overall efficiency and reduce the fuel consumption of the vehicle. This shows the big interest in energy recovery systems. This paper presents the various systems enabling the recovery of this energy. A Rankine cycle, widely used in the industry, is of particular interest. The efficiency of energy conversion varies from 5 to 20 % depending of its conception (working fluid, architecture, coupling…). Moreover, the layout of the Rankine cycle integrated within a vehicle depends on the choice of the working fluid as well as the technologies of the components i.e. the expander, the evaporator, the condenser and the pump. Within this context, the issue regarding the mass and the size of the system has to be considered. Finally, we present several solutions of Rankine systems for passenger car application and show each advantage and limits. [less ▲]

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See detailStromatactis... Où en est-on?
Boulvain, Frédéric ULg

in Publications de l'Association des Sédimentologistes Français (2011, November), 68

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See detailIntérêt d'un surguidon mobile (DBar) dans la pratique du cyclotourisme chez le sujet lombalgique
GROSDENT, Stéphanie ULg; Yerna, G.; Demoulin, Christophe ULg et al

in Revue du Rhumatisme (2011, November), 78(Suppl 5), 179

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See detailLes séances d'école du dos n'augmentent pas les peurs liées à la douleur du lombalgique chronique
Demoulin, Christophe ULg; Wuinant, N.; SOMVILLE, Pierre-René ULg et al

in Revue du Rhumatisme (2011, November), 78(Suppl 5), 182

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See detailCompte-rendu de l'atelier "Mathématiques"
Henrotay, Pierre ULg; Schneider-Gilot, Marguerite ULg

in Puzzle (2011, November)

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See detailLe sommeil chez les patients en état de conscience altérée
Cologan, Victor ULg

in Sommeil et Vigilance (2011, November), 20

Cet article offre un résumé des études sur le sommeil menées chez les patients dans le coma, en état végétatif, avec un syndrome "locked-in" et après récupération. Il illustre l'importance de tester le ... [more ▼]

Cet article offre un résumé des études sur le sommeil menées chez les patients dans le coma, en état végétatif, avec un syndrome "locked-in" et après récupération. Il illustre l'importance de tester le fonctionnement du sommeil chez le patient blessé au cerveau afin de contriburer à son évaluation clinique. [less ▲]

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See detailHumanized mice as a useful model to study HIV-1 induced immune activation, its mechanisms and potential therapeutic approaches
Singh, Maneesh; Singh, Pratibha; VAIRA, Dolorès ULg et al

in Retrovirology (2011, October 03), 8

Recent understanding of HIV-1 pathogenesis mechanism has changed our views about possible mechanisms of CD4T-cell depletion during infection. Apart from HIV-1-mediated killing a more comprehensive ... [more ▼]

Recent understanding of HIV-1 pathogenesis mechanism has changed our views about possible mechanisms of CD4T-cell depletion during infection. Apart from HIV-1-mediated killing a more comprehensive explanation has appeared that includes T cell exhaustion and chronic immune activation as a central feature in HIV-1 pathogenesis. While highly active antiretroviral therapy (HAART) markedly reduces viral load, T cell activation levels and soluble markers of inflammation remain abnormally high. Markers of chronic activation, such as CD38, PD-1 or HLA-DR on T cells, appear to be better predictors for clinical progression during HIV infection than HIV RNA levels and CD4Tcell counts alone. Therefore, a better understanding of HIV-índuced immune activation and the design of new immunomodulatory approches in combination with HAART are needed. We have generated an efficient model of human stem cells (HSCs) engraftment in NOD/LtsZ-scidlL-2Rnull (NSG) mice that supports chronic HIV infection with high plasma viral loads. HIV-1 infection in these humanized mice is characterized by widespread immune activation with increased expression of PD-1, HLA-DR, CD38, CD69, CD25 and other immune activation markers. These humanized mice provide an effective in vivo system for the assessing novel approaches for their potential in suppressing chronic immune activation during HIV-1 infection, in absence of interference of antiretroviral therapy. In this study, we evaluated in vivo the benefits of two novel approaches aimed at reducing HIV-induced immune activation. Minocycline is an antibiotic of the tetracycline family with anti-inflammatory and immunomodulatory properties affecting CD4 T cells activation by a mechanism involving the inhibition of the NF-AT1 transcription factor activity. We hypothesized that this antibiotic could suppress the HIV-1-induced chronic immune activation and thus, limit the HIV pathogenesis when combined to HAART. Therefore, we treated HIV-1 (JRCSF) infected-humanized NSG mice with minocycline (100mg/kg/day) for 60 days. We next evaluated the expression, by flow cytometry, of several T cells activation markers together with CD4+T cells counts. Our data suggest that minocycline is effective in suppressing HIV-1 induced immune activation in peripheral blood and lymphoid organs (spleen, lymph nodes and bone marrow). Levels of cellular immune activation markers such as PD-1, HLA-DR, CD38, CD69, CD25, CD28 and CTLA-4 were significantly lower in minocycline treated group. These immunological benefits of minocycline were correlated with higher CD4+T cell counts in the treated group. The immune activation which is associated with retroviral infection is also associated with increased levels of intracytoplasmic cyclic AMP which could act as a positive feedback loop in the infection since several reports have suggested that cAMP and downstream signaling pathways play an important role in the permissivity of susceptible cells to HIV infection and replication. We have used a peptide which prevents the binding of the catalytic subunit of PKA type I to its anchoring protein and therefore blocks most effects of cyclic AMP within lymphocytes and monocytes (RIAD peptide). Mice were treated with 3.5 mg/kg of RIAD peptide weekly. Treatment of humanized mice with RIAD peptide limited viral replication after high dose of HIV intraperitoneal challenge and reduced the intracytoplasmic levels of cyclic AMP. Further experiments are needed to better appreciate the therapeutic potential of these novel therapies in the suppression of HIV-induced chronic immune activation. [less ▲]

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See detailThe stellar occultation by Makemake on 2011 April 23
Ortiz, J. L.; Sicardy, B.; Assafin, M. et al

in EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. <A href="http://meetings.copernicus.org/epsc-dps2011">http://meetings.copernicus.org/epsc-dps2011</A>, p.704 (2011, October 01)

We have taken advantage of a stellar occultation by the dwarf planet Makemake on 2011 April 23, to determine several of its main physical properties. We present results from a multisite campaign with 8 ... [more ▼]

We have taken advantage of a stellar occultation by the dwarf planet Makemake on 2011 April 23, to determine several of its main physical properties. We present results from a multisite campaign with 8 positive occultation detections from 5 different sites, including data from the 8-m VLT and 3.5-m NTT telescopes in Chile, which have very high temporal resolution. Because the star was significantly fainter than Makemake (setting a record in the magnitude of a star whose occultation has been detected), the occultation resulted in a drop of just ~0.3 mag in the lightcurves. From the lightcurves we have been able to determine the size and shape of the body, its geometric albedo and constraints on its atmosphere. [less ▲]

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