Does the facultative bacteria Serratia symbiotica influence the foraging strategies of aphid parasitoids?
; ; et al
Poster (2014)Detailed reference viewed: 71 (9 ULg)
Does the local embeddedness of energy production contribute to sustainable rural development? Some evidence and propositions concerning the spreading of wind energy parks in Belgium
Schmitz, Serge ; Vanderheyden, Vincent
in Ecological and Social innovation - 9th International conference of territorial intelligence, ENTI, Strasbourg 2010., Strasbourg : France (2010) - (2010, November)
Parce que l’énergie éolienne prend place à l’échelle locale, il semble important de penser aussi son développement à ce niveau. Quand le développement éolien est globalement perçu comme positif, des ... [more ▼]
Parce que l’énergie éolienne prend place à l’échelle locale, il semble important de penser aussi son développement à ce niveau. Quand le développement éolien est globalement perçu comme positif, des problèmes apparaissent au niveau local. Basée sur une revue de la littérature et sur cinq études de cas en Belgique, la communication souligne la transition spatiale de la production d’énergie suite à la multiplication des sites éoliens. Elle propose des pistes afin de mieux inclure la société locale dans le développement éolien [less ▲]Detailed reference viewed: 20 (7 ULg)
Does the metabolic syndrome help to select patients requiring high statin dose?
in Lancet (2006), 368(9539), 893-4Detailed reference viewed: 27 (0 ULg)
Does the mission of providers matter on a quasi-market? The case of the Belgian "service voucher" scheme
Defourny, Jacques ; ; et al
in Annals of Public and Cooperative Economics = Annales de l'Economie Publique, Sociale et Coopérative (2010), 81(4), 583-610
In 2001, the Belgian government introduced a ‘service voucher’ scheme in the field of domestic (housework) services, following a quasi-market mechanism which fosters competition between providers of ... [more ▼]
In 2001, the Belgian government introduced a ‘service voucher’ scheme in the field of domestic (housework) services, following a quasi-market mechanism which fosters competition between providers of different types as regards sector (for-profit, public, third sector) and mission (seeking profits, home care provision to vulnerable groups and work integration of the unemployed). Empirical evidence suggests that third sector organizations focusing on a social mission recognized by a tutelary regulation are the best performing with regards to the quality of jobs and service organization, leading to a better ‘triangulation’ of the service relationship. On the other hand, for-profit providers, especially temporary work agencies, seem to favour their capacity of adaptation to the desiderata of their clients and costs’ minimization to the detriment of the quality of jobs which are made as flexible as possible. [less ▲]Detailed reference viewed: 196 (29 ULg)
Does the new water-soluble form of curcumin(NDS27) inhibit the oxidant response of stimulated neutrophils and HL-60 cells?
Derochette, Sandrine ; Franck, Thierry ; et al
Poster (2012, September 07)
Neutrophils (PMNs) are involved in host defense against infections through the production of reactive oxygen species (ROS) and the release of an oxidant enzyme, myeloperoxidase (MPO), to kill pathologic ... [more ▼]
Neutrophils (PMNs) are involved in host defense against infections through the production of reactive oxygen species (ROS) and the release of an oxidant enzyme, myeloperoxidase (MPO), to kill pathologic agents. But, an excessive stimulation of PMNs is associated with development of inflammatory diseases. Neutrophils are prime targets to control inflammatory events and the therapeutic use of polyphenols is proposed to lower oxidative stress. The aim of this work was to study antioxidant effect of NDS27, a water-soluble form of curcumin, on stimulated equine PMNs and human promyelocytic leukemia cells (HL-60) which are less differenciated. 2',7'-Dichlorofluorescin diacetate and lucigenin were used to measure ROS production by activated HL-60 cells or PMNs. NDS27 (10-6 to 10-4 M) was pre-incubated with cells and eliminated before their activation to study its intracellular effects on ROS production. The effect of NDS27 on MPO activity released by the cells was determined by SIEFED. Likewise, the ability of NDS27 to enter into the cells was checked by HPLC on the cellular extracts.NDS27 significantly and dose-dependently inhibited the ROS production in both cell types without affecting their viability. Its intracellular effect showed higher efficiency for PMNs while its interaction with HL-60 cells remained better. The activity of MPO released by PMNs and HL-60 cells was decreased by NDS27 with a more efficient effect for PMNs. Our findings suggest that the greater efficiency of NDS27 in mature PMNs is not due to a better membrane permeability or a better interaction between membrane and NDS27, but rather to an inhibitory effect on the ROS production by the more mature cells, probably by targeting the enzymes implied in respiratory burst like MPO and NADPH oxidase. The modulatory effect of NDS27 towards oxidant activity of cells involved in immune and inflammatory response opens therapeutic perspectives to control pathologies with excessive inflammatory reactions. [less ▲]Detailed reference viewed: 69 (8 ULg)
Does the orbital degeneracy play any role in the high thermopower of lamellar cobaltites?
; ; et al
in Journal of Applied Physics (2007), 101(8),
This article investigates the role of the CoO6 octahedron distortion on the electronic properties and more particularly on the high value of the Seebeck coefficient in the BiCaCoO lamellar cobaltites. Our ... [more ▼]
This article investigates the role of the CoO6 octahedron distortion on the electronic properties and more particularly on the high value of the Seebeck coefficient in the BiCaCoO lamellar cobaltites. Our measurements provide clues indicating that the t2g orbital degeneracy lifting has to be considered to account for the observed high temperature limit of the thermopower. They also provide experimental arguments for locating the a1g and eg′ orbitals levels on the energy scale, through the compression of the octahedron. These results are in agreement with recent ab initio calculation including the electronic correlations and concluding for the inversion of these levels as compared to the expectation from the crystal field theory. © 2007 American Institute of Physics. [less ▲]Detailed reference viewed: 17 (1 ULg)
Does the P(2X1del) variant lacking 17 amino acids in its extracellular domain represent a relevant functional ion channel in platelets?
Oury, Cécile ; ; et al
in Blood (2002)
In this letter, we questionned the existence of a ADP responsive P2X1 protein variant in platelets.Detailed reference viewed: 3 (0 ULg)
Does the phenotype at diagnosis (e.g., fibrostenosing, inflammatory, perforating) predict the course of Crohn's disease?
Louis, Edouard ; Reenaers, Catherine ; Belaiche, Jacques
in Inflammatory Bowel Diseases (2008), 14Detailed reference viewed: 20 (2 ULg)
Does the production of Belgian bioethanol fit with European requirements on GHG emissions? Case of wheat
Belboom, Sandra ; Bodson, Bernard ; Léonard, Angélique
in Biomass & Bioenergy (2015), 74
This paper undertakes an environmental evaluation of bioethanol production, using wheat cultivated in Belgium. Cultivation steps are modelled using Belgian specific data. Wheat transformation in ethanol ... [more ▼]
This paper undertakes an environmental evaluation of bioethanol production, using wheat cultivated in Belgium. Cultivation steps are modelled using Belgian specific data. Wheat transformation in ethanol relies on industrial data. GHG emissions of the whole life cycle are calculated and compared with the default values given by the European Renewable Energy Directive. Belgian wheat bioethanol achieves a 5% higher GHG reduction than the one mentioned in the European directive but impact repartition is different with a higher importance of cultivation step in our case. Belgian wheat bioethanol complies with the current sustainability criteria but is also able to conform to further ones. Sensitivity analyses are performed on the importance of N fertilizers and associated emissions known as main important parameters. These analyses reveal non negligible variations and then a range of available GHG reduction when using wheat bioethanol. [less ▲]Detailed reference viewed: 45 (12 ULg)
Does the self-face grab and/or retain attention? An eye movement study
Devue, Christel ; ; Brédart, Serge et al
in Perception (2008), 37(Suppl. S), 94
Previous studies that investigated the ability of high priority stimuli to grab attention reported contradictory results. In the present study, eye tracking was used to examine the effect of the presence ... [more ▼]
Previous studies that investigated the ability of high priority stimuli to grab attention reported contradictory results. In the present study, eye tracking was used to examine the effect of the presence of the self-face among unfamiliar faces in a visual search task in which face identity was task-irrelevant. We evaluated whether the self-face (i) received prioritized selection, (ii) retained attention, and (iii) whether its status as target or distractor had a differential effect. Another highly familiar face was included to control whether possible effects were specific to the self-face or could be explained by high familiarity. We found that the presence of the self-face affected performance on the search task. This was not due to a prioritized processing but rather to a difficulty to disengage attention. Crucially, this effect seemed due to self-face familiarity. Indeed, similar results were obtained with the other familiar face. Moreover, the effect of the self-face was stronger when it was presented as the target than when it was a distractor. [less ▲]Detailed reference viewed: 106 (11 ULg)
Does the self-referential stimuli percpetion decrease with diminished level of consciousness?
in Vanhaudenhuyse, Audrey; BOVEROUX, Pierre; Bruno, Marie-Aurélie (Eds.) et al Journal of Neurology (2012)Detailed reference viewed: 31 (0 ULg)
Does the soil’s effective hydraulic conductivity adapt in order to obey the Maximum Entropy Production principle? A lab experiment
Westhoff, Martijn ; ; Erpicum, Sébastien et al
Conference (2015, April)
The Maximum Entropy Production (MEP) principle is a conjecture assuming that a medium is organized in such a way that maximum power is subtracted from a gradient driving a flux (with power being a flux ... [more ▼]
The Maximum Entropy Production (MEP) principle is a conjecture assuming that a medium is organized in such a way that maximum power is subtracted from a gradient driving a flux (with power being a flux times its driving gradient). This maximum power is also known as the Carnot limit. It has already been shown that the atmosphere operates close to this Carnot limit when it comes to heat transport from the Equator to the poles, or vertically, from the surface to the atmospheric boundary layer. To reach this state close to the Carnot limit, the effective thermal conductivity of the atmosphere is adapted by the creation of convection cells (e.g. wind). The aim of this study is to test if the soil’s effective hydraulic conductivity also adapts itself in such a way that it operates close to the Carnot limit. The big difference between atmosphere and soil is the way of adaptation of its resistance. The soil’s hydraulic conductivity is either changed by weathering processes, which is a very slow process, or by creation of preferential flow paths. In this study the latter process is simulated in a lab experiment, where we focus on the preferential flow paths created by piping. Piping is the process of backwards erosion of sand particles subject to a large pressure gradient. Since this is a relatively fast process, it is suitable for being tested in the lab. In the lab setup a horizontal sand bed connects two reservoirs that both drain freely at a level high enough to keep the sand bed always saturated. By adding water to only one reservoir, a horizontal pressure gradient is maintained. If the flow resistance is small, a large gradient develops, leading to the effect of piping. When pipes are being formed, the effective flow resistance decreases; the flow through the sand bed increases and the pressure gradient decreases. At a certain point, the flow velocity is small enough to stop the pipes from growing any further. In this steady state, the effective flow resistance of the sand bed will be compared with the theoretical optimal flow resistance obtained with the MEP principle. For this study, different magnitudes of the forcing will be tested, while also the effect of dry spells will be explored. [less ▲]Detailed reference viewed: 50 (6 ULg)
Does the surgical treatment for lumbar radiculopathy fulfil patients preoperative expectations?
Demoulin, Christophe ; ; Martin, Didier et al
in Abstract book of the 8th Interdisciplinary World Congress on Low Back and Pelvic Pain (2013, October)Detailed reference viewed: 18 (2 ULg)
Does the surgical treatment for lumbar radiculopathy fulfill patients preoperative expectations? A one-year follow-up study
Demoulin, Christophe ; ; Martin, Didier et al
in WIP 2014 Abstract Book (2014, May)Detailed reference viewed: 42 (5 ULg)
Does Tight Glycemic Control positively impact on patient mortality?
Penning, Sophie ; ; et al
Poster (2012, March 20)Detailed reference viewed: 20 (5 ULg)
Does Tight Glycemic Control positively impact on patient mortality?
Penning, Sophie ; ; et al
in Critical Care (2012, March 20)Detailed reference viewed: 20 (4 ULg)
Does Time Influence Reproducibility of the Roland-Morris Disability Questionnaire?
; Demoulin, Christophe ;
in Abstract book of the Boston International Forum X - Primary Care Research on low back pain (2009, June)Detailed reference viewed: 41 (9 ULg)
Does treatment with erythropoietin improve left ventricular systolic performance and mitral regurgitation in patients with heart failure and chronic kidney disease?
; Lancellotti, Patrizio ; et al
in European Heart Journal (2006, August), 27(Suppl. 1), 339Detailed reference viewed: 10 (0 ULg)
Does Tribolium brevicornis cuticular chemistry deter cannibalism and predation of pupae?
; ; et al
in Journal of Insect Science [=JIS] (2011), 11
The cuticular hydrocarbons of insects are species-specific and often function as semiochemicals. The activity of Tribolium brevicornis cuticular hydrocarbons as feeding deterrents that ostensibly function ... [more ▼]
The cuticular hydrocarbons of insects are species-specific and often function as semiochemicals. The activity of Tribolium brevicornis cuticular hydrocarbons as feeding deterrents that ostensibly function to prevent pupal cannibalism and predation was evaluated. The cuticular hydrocarbons of T. brevicornis pupae were characterized and flour disk bioassays conducted with individual and combined extract components incorporated into artificial diets on which Tribolium adults fed for six days. Feeding by T. brevicornis and T. castaneum on flour disks containing cuticular extracts of T. brevicornis pupae resulted in reduced consumption and weight loss relative to feeding on control flour disks. In both cases, feeding deterrence indices exceeded 80% suggesting that T. brevicornis cuticular hydrocarbons could function to deter cannibalism and predation of pupae by larvae and adult beetles. Sixteen different cuticular hydrocarbons were identified in T. brevicornis pupal extracts. Eight of the commercially available linear alkanes were tested individually in feeding trials with eight Tribolium species. One compound (C28) significantly reduced the amount of food consumed by three species compared to control disks, whereas the compounds C25, C26, and C27elicited increased feeding in some species. Four other compounds had no effect on consumption for any species. When four hydrocarbon mixtures were tested for synergistic deterrence on T. brevicornis and T. castaneum, none significantly influenced consumption. Our results indicate that the cuticular chemistry of T. brevicornis pupae could serve to deter predation by conspecific and congeneric beetles. [less ▲]Detailed reference viewed: 18 (4 ULg)
Does turbulence affect the habitat choice of Atlantic salmon parr?
; Ovidio, Michaël ; et al
Conference (2007, June)
Habitat preferences of Atlantic salmon parr are commonly described using mean flow velocity, water depth, and substrate as habitat variables, and a variety of habitat models have been developed using ... [more ▼]
Habitat preferences of Atlantic salmon parr are commonly described using mean flow velocity, water depth, and substrate as habitat variables, and a variety of habitat models have been developed using these variables to predict habitat quality. However, Atlantic salmon parr live in highly turbulent streams and rivers, in which intense fluctuations of flow velocity occur. Habitat preferences that consider the high variability of flow velocity have not been studied, and this although it has been shown in laboratory experiments that turbulence may affect the behavior and energetics of fish. Consequently, we studied the use of turbulent flow by Atlantic salmon parr in Patapédia River, Québec, Canada using radio-telemetry. We analyzed summer habitat preferences of individual parr in relation to several dynamic hydraulic variables such as standard deviation of flow velocity, turbulent kinetic energy, Froude number, and shear stress, and compared them with the habitat availability within the river reach. Our results revealed that in a natural flow environment, parr display a high individual variability in habitat preferences in relation to flow turbulence. Such heterogeneous habitat preferences suggest that individuals are not constrained to single habitat types and exhibit flexible habitat use. Furthermore, no differences were observed in habitat preferences between the four daily periods (dawn, day, dusk, and night) within individual parr. [less ▲]Detailed reference viewed: 50 (3 ULg)