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See detailWATER-BORNE EMERGING ZOONOSE? CASE REPORT ON ERYSIPELAS (ERYSIPELOTHRIX RHUSIOPATHIAE) IN HARBOUR PORPOISES (PHOCOENA PHOCOENA) AND HARBOUR SEAL (PHOCA VITULINA).
Boseret, Géraldine ULiege; Saegerman, Claude ULiege; Mainil, Jacques ULiege et al

Poster (2012, March 26)

An adult female harbour porpoise (Phocoena phocoena) and a juvenile male harbour seal (Phoca vitulina) have been found stranded dead on the Belgian coast in late 2001. As the two bodies were in good ... [more ▼]

An adult female harbour porpoise (Phocoena phocoena) and a juvenile male harbour seal (Phoca vitulina) have been found stranded dead on the Belgian coast in late 2001. As the two bodies were in good condition (CC = 2), necropsy and bacteriological analyses were performed as well as other postmortem investigations. Blood heart and organs (liver, digestive and respiratory tract, lungs, spleen, brain, kidneys) samples have been collected and analyzed. The porpoise showed evidence of septicaemia, and the seal presented lesions of acute enteritis. Pure and abundant growth of a small rod-shaped, Gram-labile bacterium was obtained aerobically and anaerobically on Columbia blood agar from heart blood, mouth, pharynx, lungs, intestine and anus of the porpoise, and from intestine, pharynx, mouth, nose and anus of the seal. The colonies were surrounded by a narrow zone of alpha-hemolysis. Catalase- and peroxydase-tests gave negative results. Rapid ID 32 Strepto (Biomérieux, France) sugar tests identified this isolate as Erysipelothrix rhusiopathiae. E. rhusiopathiae could be therefore considered as the cause of septicaemia on the porpoise as it was present in heart blood and internal organs, and could be associated primary or secondary with the enteritis reported on the seal as the bacterium was isolated in pure culture in the digestive tract. E. rhusiopathiae infections have been reported in captive dolphins and sea lions. This zoonotic pathogen is also involved in human local infections, like the “seal finger”, resulting from captive pinnipeds bites. However, it has not been so far described as systemic pathogens of wild cetaceans and pinnipeds. E. rhusiopathiae could be therefore considered as a potentially emergent pathogen which could have important repercussions on human health, particularly veterinarians, marine mammals rescue teams and zoos. [less ▲]

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See detailWater-Energy Nexus in Shared River Basins: How Hydropower Shapes Cooperation and Coordination
Kouangpalath, Phimthong ULiege; Meijer, Karen

in Change and Adaptation in Socio-Ecological Systems (2015), 2(1), 85-87

The construction of hydropower plants on transboundary rivers is seldom done with equal benefits to all riparians, and therefore presents coordination and cooperation challenges. Without a supra-national ... [more ▼]

The construction of hydropower plants on transboundary rivers is seldom done with equal benefits to all riparians, and therefore presents coordination and cooperation challenges. Without a supra-national authority in charge of transboundary river basins, coordination between sectors (water, energy and environment) and cooperation between countries largely depends on willingness of the individual nation states and the power relations between these countries. This paper discusses how the interests and relative power positions of actors in transboundary water management shape the outcomes, and what roles are played by River Basin Organisations and foreign investors (especially in hydropower development). These issues are illustrated with examples from the Mekong river in Southeast Asia (Laos, Thailand, Cambodia and Vietnam), the Euphrates-Tigris (Turkey, Syria, Iraq, Iran and Kuwait) and the Çoruh in Turkey and Georgia. [less ▲]

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See detailWater-soluble complexes formed by poly(2-vinylpyridinium)-block-poly(ethylene oxide) and poly(sodium methacrylate)-block-poly(ethylene oxide) copolymers
Gohy, Jean-François; Varshney, Sunil K; Jérôme, Robert ULiege

in Macromolecules (2001), 34(10), 3361-3366

Formation of interpolyelectrolyte complexes (IPEC) by mixing protonated poly(2-vinylpyridine)-block-poly(ethylene oxide) (P2VP-b-PEO) with neutralized poly(methacrylic acid)-block-poly(ethylene oxide ... [more ▼]

Formation of interpolyelectrolyte complexes (IPEC) by mixing protonated poly(2-vinylpyridine)-block-poly(ethylene oxide) (P2VP-b-PEO) with neutralized poly(methacrylic acid)-block-poly(ethylene oxide) (PMAA-b-PEO) has been investigated in water. It was observed that (i) IPEC are formed in a limited pH range, which is controlled by the degree of ionization of the PMAA and P2VP blocks; (ii) IPEC self-assemble to form the core of monodisperse spherical micelles surrounded by a corona of PEO blocks; (iii) IPEC are salt-sensitive, falling apart above a critical salt concentration; (iv) IPEC are not observed at high pH, but micelles are formed by the P2VP-b-PEO copolymers, which contain an uncharged P2VP core surrounded by a PEO corona; (v) IPEC are not observed at low pH, but the PMAA-b-PEO diblocks aggregate into micelles, the core of which is formed by a hydrogen-bonded complex between PMAA and PEO; and (vi) these PMAA-b-PEO micelles, which are temperature-sensitive, show a complete reorganization of the micellar core above a critical temperature. [less ▲]

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See detailWater-soluble complexes formed by sodium poly(4-styrenesulfonate) and a poly(2-vinylpyridinium)-block-poly(ethyleneoxide) copolymer
Gohy, Jean-François; Varshney, Sunil K; Antoun, Said et al

in Macromolecules (2000), 33(25), 9298-9305

Formation of interpolyelectrolyte complexes (IPEC) between sodium poly(4-styrenesulfonate) (PSSO3Na) and a diblock copolymer consisting of a protonated poly(2-vinylpyridine) (P2VP) block and a neutral ... [more ▼]

Formation of interpolyelectrolyte complexes (IPEC) between sodium poly(4-styrenesulfonate) (PSSO3Na) and a diblock copolymer consisting of a protonated poly(2-vinylpyridine) (P2VP) block and a neutral poly(ethylene oxide) (PEO) one was investigated in water. The main experimental variables were the molecular weight (MW) of the PSSO3Na polyanion, the molar ratio of the cationic and anionic species (i.e., the stoichiometry of the complex), and the pH of the aqueous solution. It was observed that (i) the interpolyelectrolyte complexes self-assemble at least at low pH into the core of monodisperse spherical micelles surrounded by a corona of PEO blocks and possibly of uncomplexed PSSO3Na segments, (ii) their stability depends on the pH in relation to the degree of protonation of the P2VP block, whatever the MW of the PSSO3Na polyanion and the cation/anion stoichiometry, (iii) the complexes are dissociated above a critical pH and are salt-sensitive, falling apart above a critical salt concentration, and (iv) a cooperative mechanism operates, which is completely reversible. [less ▲]

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See detailWATER-SOLUBLE NIMESULIDE SALT, AND USES THEREOF FOR THE TREATMENT OF INFLAMMATIONS
Pirotte, Bernard ULiege; Piel, Géraldine ULiege; Delneuville, Isabelle et al

Patent (1995)

Water-soluble nimesulide salt comprised of the product obtained from the reaction of nimesulide and L-lysine, preparation thereof, aqueous solution containing it, associations based on nimesulide with ... [more ▼]

Water-soluble nimesulide salt comprised of the product obtained from the reaction of nimesulide and L-lysine, preparation thereof, aqueous solution containing it, associations based on nimesulide with cyclodextrins, and uses thereof. [less ▲]

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See detailA water-soluble salt of curcumin (NDS27) inhibits myeloperoxidase and NADPH oxidase activities, two major enzymes of neutrophils.
Derochette, Sandrine ULiege; Mouithys-Mickalad, Ange ULiege; Deby-Dupont, Ginette et al

Poster (2013, September 11)

Neutrophils (PMNs) produce reactive oxygen species (ROS) to kill pathogenic agents. After appropriate stimulation, leading to the activation of protein kinase C (PKC), the cytosolic subunits of the NADPH ... [more ▼]

Neutrophils (PMNs) produce reactive oxygen species (ROS) to kill pathogenic agents. After appropriate stimulation, leading to the activation of protein kinase C (PKC), the cytosolic subunits of the NADPH oxidase (Nox2) are phosphorylated and translocated to the membrane flavocytochrome b558, forming the active enzyme which produces superoxide anion (O2●-). From O2●- derives H2O2 used by the PMNs myeloperoxidase (MPO) to form strong oxidant species. Many human and animal pathologies with fatal issue are associated with uncontrolled activation of PMNs. The modulation of enzymes implied in ROS production is thus a primary target to manage excessive inflammatory events. For this purpose, we evaluated the effects of NDS27, a water-soluble salt of curcumin combined with hydroxypropyl-β-cyclodextrin, on the activities of PKC, Nox2 and MPO. PKC activation was determined by western blotting with specific antibodies against phosphorylated PKC in extracts from PMNs after their incubation or not with NDS27. A cell-free assay was used to evaluate the effect of NDS27 before or after the assembly of Nox2 subunits. MPO activity was tested by the SIEFED technique in which NDS27 was pre-incubated with the enzyme and discarded before its activity measurement. An inhibition of PKC phosphorylation and Nox2 activity were observed at respectively 10-4 and 10-5 M of NDS27. The Nox2 inhibition was more pronounced when NDS27 was added before the assembly stimulation, suggesting a direct action of NDS27 on the subunits translocation. NDS27 also dose-dependently decreased the activity of MPO (21 % at 10-5 M), indicating an interaction with the enzyme structure. Our results demonstrated that NDS27 is a potent inhibitor of the two major enzymes responsible for ROS production in PMNs, and also acts on the activation cascade of Nox2. The modulatory effect of NDS27 towards the oxidant activity of PMNs opens therapeutic perspectives to control pathologies with excessive inflammatory reactions. [less ▲]

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See detailWaterjet dissection and vacuum-assisted resection of supratentorial meningioma
Martin, Didier ULiege

Conference (2011, September 15)

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See detailWatershed Liming in the Belgian Ardennes : Effects on soil solution and streamwater chemistry
Carnol, Monique ULiege; Hambuckers, Alain ULiege; Remacle, Jean ULiege

Conference (1997, June)

Forest liming has received increased attention in the 1980s, when unusual needle yellowing and fall were observed in large parts of Europe and North America. This ‘new forest decline’ has been attributed ... [more ▼]

Forest liming has received increased attention in the 1980s, when unusual needle yellowing and fall were observed in large parts of Europe and North America. This ‘new forest decline’ has been attributed to several causes acting individually or synergetically, amongst which were acidification, N saturation and nutritional imbalances. This time, liming did not aim at increased productivity, but as a counteracting measure to the soil acidification and to remove nutritional imbalances. The Belgian Ardennes were not exempt from this phenomena and symptoms of forest dieback were reported in 1983 by Weissen (Weissen et al.,1983). Soils are naturally poor in magnesium and the observed dieback was supposed to be the consequence of increased pollution exacerbating the deficiency in magnesium. A reduction in productivity and financial losses were predicted. Liming was suggested for prevention and correction, however possible side effects, in particular on soil solution (tree nutrition) and stream water chemistry (drinking water) needed to be evaluated. In this paper, we present results from a case study in four Picea abies watersheds in southern Belgium. The paired watersheds of approximately 80 ha were situated in the ‘Haute Ardenne’ and in the ‘Ardenne occidentale’ regions, on acid brown soils. One watershed of each pair was limed with 3 T/ha of fine ground dolomite ((Ca,Mg)CO3) 55/40 and 200 kg/ha K2SO4 in 1992 and 1993, respectively. Rainfall, throughfall and monolith lysimeter soil solution were analysed at monthly intervals, and runoff chemistry at two-weekly intervals (volume-weighed reconstructed daily samples). Time series intervention analysis was used as a tool to detect statistically significant changes in stream water chemistry due to the liming event, and fluxes were calculated to evaluate losses of the applied dolomitic lime to the catchment stream. Dolomite dissolution distinctively affected streamwater chemistry in the watershed situated in the Hautes Ardennes (Waroneu). Magnesium concentrations increased immediately after liming, most likely due to surface runoff. Four years after liming, concentrations were still higher than prior to liming. However, the proportions of magnesium lost were relatively low compared to the dose applied. Calcium concentrations did not change after liming in either catchment, nor did the concentrations of the major cations and anions measured. In the monolith lysimeters, magnesium concentrations increased immediately after liming under the organic horizons, and one year after liming under the mineral horizons. Calcium concentrations increased only three years after the application of lime under the organic and mineral horizons. These results led to the conclusions that for the soils under study and the doses applied, a major part of the lime was retained by the soil system, and that consequences on water chemistry were minor. [less ▲]

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See detailWath’s new in the management of spinal cord injury ?
Martin, Didier ULiege

Conference (2006, October 13)

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See detailThe wave function of $[70,1^-]$ baryons in the $1/N_c$ expansion
Matagne, Nicolas; Stancu, Floarea ULiege

in Phys. Rev. (2008), D77

Much work has been devoted to the study of nonstrange baryons belonging to the $[\textbf{70},1^-]$ multiplet in the framework of the $1/N_c$ expansion. Using group theoretical arguments here we examine ... [more ▼]

Much work has been devoted to the study of nonstrange baryons belonging to the $[\textbf{70},1^-]$ multiplet in the framework of the $1/N_c$ expansion. Using group theoretical arguments here we examine the relation between the exact wave function and the approximate one, customarily used in applications where the system is separated into a ground state core and an excited quark. We show that the exact and approximate wave functions globally give similar results for all of mass operators presented in this work. However we find that the inclusion of operators acting separately on the core and on the excited quark deteriorates the fit and leads to unsatisfactory values for the coefficients which encode the quark dynamics. Much better results are obtained when we include operators acting on the whole system, both for the exact and the approximate wave function. [less ▲]

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See detailWave packet dynamics along bifurcating reaction paths
Lasorne, Benjamin; Dive, Georges ULiege; Lauvergnat, David et al

in Journal of Chemical Physics (2003), 118(13), 5831-5840

The problem of bifurcating reaction paths is revisited by wave packet (WP) dynamics. The pitchfork model connecting five stationary points-a reactive, two transition structures and two enantiomeric ... [more ▼]

The problem of bifurcating reaction paths is revisited by wave packet (WP) dynamics. The pitchfork model connecting five stationary points-a reactive, two transition structures and two enantiomeric products-is characterized by a Valley Ridge inflection point (VRI) where WP could leave the standard intrinsic reaction path. We question the role of such a VRI point to determine whether the mechanism is sequential or concerted. WP simulations on two-dimensional minimum energy surfaces are carried out in the benchmark case of the methoxy radical isomerization H3CO-->H2COH. The ab initio potential energy surface (PES) is fitted to an analytical model which is bent to analyze the incidence of geometrical parameters on the WP behavior. For each of these generated PES, the WP width in the entrance valley is the main factor which conditions the behavior on the unstable ridge. The WP evolution is also analyzed in terms of nonadiabatic transitions among adiabatic channels along the reaction coordinate. Finally, the location of VRI points according to an invariant definition is discussed. (C) 2003 American Institute of Physics. [less ▲]

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See detailWave packet methods for charge exchange processes in ion-atom collision
Baloïtcha, Ezinvy; Desouter, Michèle ULiege; Bacchus-Montabonel, Marie-Christine et al

in Journal of Chemical Physics (2001), 114

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See detailWave packet propagation for constrained molecular systems. Spectroscopic applications to triatomic molecules
Lauvergnat, David; Justum, David; Desouter, Michèle ULiege et al

in Journal of Molecular Structure : Theochem (2002), 577

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See detailWave packets in a bifurcating region of an energy landscape: Diels-Alder dimerization of cyclopentadiene
Lasorne, Benjamin; Dive, Georges ULiege; Desouter, Michèle ULiege

in Journal of Chemical Physics (2005), 122(18), 1843041-10

Quantum dynamics in a valley ridge inflection (VRI) point region is analyzed in the case of the Diels-Alder endo-dimerization of cyclopentadiene pointed out recently by [Caramella , J. Am. Chem. Soc. 124 ... [more ▼]

Quantum dynamics in a valley ridge inflection (VRI) point region is analyzed in the case of the Diels-Alder endo-dimerization of cyclopentadiene pointed out recently by [Caramella , J. Am. Chem. Soc. 124, 1130 (2002)]. The VRI point is located along the reaction path connecting the bispericyclic symmetrical transition structure put in evidence by Caramella and the transition state of the Cope rearrangement. Dynamics is carried out by using constrained Hamiltonian methodology. The active coordinates are the first formed C-C bond length and the difference between the two other C-C bond lengths which achieve the dimerization as 4+2 or 2+4 adducts. A two-dimensional (2D) minimum-energy surface have been computed at the Becke 3 Lee-Yong-Parr/6-31G(*) level. The energy landscape can be classified as an uphill ridge-pitchfork VRI bifurcation according to a recent classification of bifurcation events [W. Quapp, J. Mol. Struct. 695-696, 95 (2004)]. Dynamics does not describe the thermal reaction but concerns wave packets which could be prepared by pulse reagents, i.e., by coherent control. We analyze how the shape and initial location on the ground potential-energy surface are linked to the synchronous or asynchronous mechanism of the final step after the first transition state. We use a one-dimensional model of optimum control theory to check the feasibility of such a coherent preparation. The wave-packet evolution in the VRI domain is well explained by semiclassical predictions even with the negative curvature of the unstable ridge. Finally, a crude model of dissipation has been introduced to test the stability of the 2D predictions. (c) 2005 American Institute of Physics. [less ▲]

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See detailWave propelled ratchets and drifting rafts
Eddi, Antonin; Terwagne, Denis ULiege; Fort, Emmanuel et al

in Europhysics Letters [=EPL] (2008), 82

Several droplets, bouncing on a vertically vibrated liquid bath, can form various types of bound states, their interaction being due to the waves emitted by their bouncing. Though they associate droplets ... [more ▼]

Several droplets, bouncing on a vertically vibrated liquid bath, can form various types of bound states, their interaction being due to the waves emitted by their bouncing. Though they associate droplets which are individually motionless, we show that these bound states are self- propelled when the droplets are of uneven size. The driving force is linked to the assymetry of the emitted surface waves. The direction of this ratchet-like displacement can be reversed, by varying the amplitude of forcing. This direction reversal occurs when the bouncing of one of the drops becomes sub-harmonic. As a generalization, a larger number of bouncing droplets form crystalline rafts which are also shown to drift or rotate when assymetrical. [less ▲]

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See detailWave reflection in the three element WindKessel model
Gommes, Cédric ULiege

in Medical & Biological Engineering & Computing (1999, June), 37

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See detailWave turbulence on the surface of a ferrofluid in a horizontal magnetic field
Dorbolo, Stéphane ULiege; Falcon, Eric

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2011), 82

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See detailWave-particle duality in a two atom interferometer
Schilling, U.; Thiel, C.; Bastin, Thierry ULiege et al

Conference (2008)

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See detailWave-particle duality in a two atom interferometer
Schilling, U.; Thiel, C.; Bastin, Thierry ULiege et al

Poster (2009)

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See detailWaveform relaxation for the computational homogenization of multiscale magnetoquasistatic problems
Niyonzima, Innocent; Geuzaine, Christophe ULiege; Schöps, Sebastian

in Journal of Computational Physics (2016), 327

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