References of "2007"
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See detailThe metabolome of developing pea seeds
Vigeolas, Hélène ULg

Conference (2007)

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See detailKarsts des craies et calcarénites de la Montagne Saint-Pierre (Basse Meuse liégeoise)
Willems, Luc ULg; Rodet, Joël; Ek, Camille ULg et al

in Bulletin des Chercheurs de la Wallonie (2007), XLVI

The “Montagne Saint-Pierre” (Sint Pietersberg) is a separate part of the Hesbaye plateau, isolated between the lower valleys of the Geer and the Meuse rivers. It is exploited by a big open-air quarry and ... [more ▼]

The “Montagne Saint-Pierre” (Sint Pietersberg) is a separate part of the Hesbaye plateau, isolated between the lower valleys of the Geer and the Meuse rivers. It is exploited by a big open-air quarry and by numerous underground quarries developing galleries on hundreds of kilometers long. Excavated in Cretaceous chalk and calcarenite, these artificial networks allow an exceptional 3-D observation of karsts inside a very porous and permeable rock, less favourable to a concentrated solution. The most numerous of them are “organ pipes” or “earth pipes”. They are vertical tubular solution pipes that may exceed 60 m in depth. Sponge networks and subhorizontal caves occur, without any visible connection with fracturation. Finally, downwards to at least 20 m below the alluvial plain of the Meuse river, pluridecametric nodes of weathered chalk are found. By their size and rounded morphology, the nodes resemble to the natural caves occurring in the calcarenite and intersected by the underground quarries. All the studied karsts allow us to propose a scenario for the genesis of a polyphase karst system. Independently of surface conditions, caves are generated deeply in the phreatic zone (endokarsts). During the downcutting of theMeuse valley, and related to the fluvial terraces, solution pipes (input karsts) are generated. Due to the valley incision and to the lowering of the aquifer,theses solution pipes progress downward and cut the endokarsts. A concentrated water circulation takes place. In the dewatered upper part of the system, caves cut by solution pipes are rapidly filled by superficial deposits. The high porosity of the calcarenite makes it comparable to a sponge. The rock absorbs quickly the out-flows coming from the surface and causes a rapid deposit of the fine particles transported inside horizontal passages. The sealing of these conduits allows their conservation inside a very crumbly rock. [less ▲]

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See detailA primary culture of mouse proximal tubular cells, established on collagen-coated membranes.
Terryn, Sara; JOURET, François ULg; Vandenabeele, Frank et al

in American Journal of Physiology - Renal Physiology (2007), 293(2), 476-85

A simple method is described to establish primary cultures of kidney proximal tubule cells (PTC) on membranes. The permeable membranes represent a unique culture surface, allowing a high degree of ... [more ▼]

A simple method is described to establish primary cultures of kidney proximal tubule cells (PTC) on membranes. The permeable membranes represent a unique culture surface, allowing a high degree of differentiation since both apical and basolateral membranes are accessible for medium. Proximal tubule (PT) segments from collagenase-digested mouse renal cortices were grown for 7 days, by which time cells were organized as a confluent monolayer. Electron microscopic evaluation revealed structurally polarized epithelial cells with numerous microvilli, basolateral invaginations, and apical tight junctions. Immunoblotting for markers of distinct parts of the nephron demonstrated that these primary cultures only expressed PT-specific proteins. Moreover immunodetection of distinct components of the receptor-mediated endocytic pathway and uptake of FITC-albumin indicated that these cells expressed a functional endocytotic apparatus. In addition, primary cultures possessed the PT brush-border enzymes, alkaline phosphatase, and gamma-glutamyl-transferase, and a phloridzin-sensitive sodium-dependent glucose transport at their apical side. Electrophysiological measurements show that the primary cultured cells have a low transepithelial resistance and high short-circuit current that was completely carried by Na(+) similar to a leaky epithelium like proximal tubule cells. This novel method established well-differentiated PTC cultures. [less ▲]

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See detailGlacial and interglacial sedimentary regimes at sites 1305 and 646 (S Greenland Rise) under 40 vs. 100 kyr forcings.
Hillaire-Marcel; De Vernal; Fagel, Nathalie ULg et al

Conference (2007)

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See detailHemodynamic cerebral correlates of sleep spindles during human non-rapid eye movement sleep.
Schabus, Manuel ULg; Dang Vu, Thien Thanh ULg; Albouy, Geneviève ULg et al

in Proceedings of the National Academy of Sciences of the United States of America (2007), 104(32), 13164-9

In humans, some evidence suggests that there are two different types of spindles during sleep, which differ by their scalp topography and possibly some aspects of their regulation. To test for the ... [more ▼]

In humans, some evidence suggests that there are two different types of spindles during sleep, which differ by their scalp topography and possibly some aspects of their regulation. To test for the existence of two different spindle types, we characterized the activity associated with slow (11-13 Hz) and fast (13-15 Hz) spindles, identified as discrete events during non-rapid eye movement sleep, in non-sleep-deprived human volunteers, using simultaneous electroencephalography and functional MRI. An activation pattern common to both spindle types involved the thalami, paralimbic areas (anterior cingulate and insular cortices), and superior temporal gyri. No thalamic difference was detected in the direct comparison between slow and fast spindles although some thalamic areas were preferentially activated in relation to either spindle type. Beyond the common activation pattern, the increases in cortical activity differed significantly between the two spindle types. Slow spindles were associated with increased activity in the superior frontal gyrus. In contrast, fast spindles recruited a set of cortical regions involved in sensorimotor processing, as well as the mesial frontal cortex and hippocampus. The recruitment of partially segregated cortical networks for slow and fast spindles further supports the existence of two spindle types during human non-rapid eye movement sleep, with potentially different functional significance. [less ▲]

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See detailLa reconfiguration de l'enfance au Katanga
Rubbers, Benjamin ULg

Report (2007)

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See detailInfluence of soil suction on trench stability
Whenham, Valérie; De Vos, Monika; Legrand, Christian et al

in Proc. of the 2nd Int. Conf. on Mechanics of Unsaturated Soils - USS2007 Experimental Unsaturated Soil Mechanics (2007)

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See detailModel Identification and FE Simulations Effect of Different Yield Loci and Hardening Laws in Sheet Forming
Flores, Paulo; Duchene, Laurent ULg; Bouffioux, Chantal ULg et al

in International Journal of Plasticity (2007), 23(3), 420-449

The bi-axial experimental equipment [Flores, P., Rondia, E., Habraken, A.M., 2005a. Development of an experimental equipment for the identification of constitutive laws (Special Issue). International ... [more ▼]

The bi-axial experimental equipment [Flores, P., Rondia, E., Habraken, A.M., 2005a. Development of an experimental equipment for the identification of constitutive laws (Special Issue). International Journal of Forming Processes] developed by Flores enables to perform Bauschinger shear tests and successive or simultaneous simple shear tests and plane strain tests. Flores investigates the material behavior with the help of classical tensile tests and the ones performed in his bi-axial machine in order to identify the yield locus and the hardening model. With tests performed on one steel grade, the methods applied to identify classical yield surfaces such as [Hill, R., 1948. A theory of the yielding and plastic flow of anisotropic materials. Proceedings of the Royal Society of London A 193, 281–297; Hosford, W.F., 1979. On yield loci of anisotropic cubic metals. In: Proceedings of the 7th North American Metalworking Conf. (NMRC), SME, Dearborn, MI, pp. 191–197] ones as well as isotropic Swift type hardening, kinematic Armstrong–Frederick or Teodosiu and Hu hardening models are explained. Comparison with the Taylor–Bishop–Hill yield locus is also provided. The effect of both yield locus and hardening model choices is presented for two applications: plane strain tensile test and Single Point Incremental Forming (SPIF). [less ▲]

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See detailModelling of metal forming lubrication by O/W emulsions
MONTMITONNET, P.; STEPHANY, A.; CASSARINI, S. et al

in International Conference on Tribology in Manufacturing Processes. ICTMP 2007 (2007)

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See detailMG-63 osteoblasts culture on poly-(lactic acid) degradable textiles for bone tissue regeneration
Moniotte, Nicolas; Pirotte, Fabrice; Borget, Pascal et al

Article for general public (2007)

This work shows that knitted PLA fabrics, seeded with human MG-63 osteoblasts can potentially be used as tissue engineered systems for in vitro to in vivo transition, for the treatment of bone defect

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See detailEvaluation of oral corticosteroids and phosphodiesterase-4 inhibitor on the acute inflammation induced by inhaled lipopolysaccharide in human.
Michel, Olivier; Dentener, Mieke; Cataldo, Didier ULg et al

in Pulmonary Pharmacology & Therapeutics (2007), 20(6), 676-83

Background Endotoxins are pro-inflammatory substances present in the environment. In man, inhalation of its purified derivative lipopolysaccharide (LPS) induces inflammation related to macrophages and ... [more ▼]

Background Endotoxins are pro-inflammatory substances present in the environment. In man, inhalation of its purified derivative lipopolysaccharide (LPS) induces inflammation related to macrophages and neutrophils. Corticosteroids and phosphodiesterase (PDE)-4 inhibitors have inhibiting effects on macrophages and neutrophils, respectively. This study investigated the effect of prednisolone and of the PDE-4 inhibitor cilomilast on the LPS-induced acute inflammation. Methods The study was a placebo-controlled, double-blind crossover design. On three occasions, at 2 weeks interval, 16 healthy subjects inhaled 50 μg LPS after a 6-day treatment with cilomilast (15 mg bd), prednisolone (10 mg bd) or placebo. For the assessment of the inflammatory response, induced sputum was obtained before inclusion and 6 h post-LPS while blood samples were collected before, 6 and 24 h post-LPS. Results Inhaled LPS induced an increase in sputum neutrophils (p<0.0001), logMMP-9 (p<0.05), logMMP-9/TIMP-1 (p<0.01) and logTNF-α (p<0.02). At the blood level there were significant rise in neutrophilia (p<0.001), E-selectin (p<0.02), C-reactive protein (CRP) (p<0.001) and LPS-binding protein (p<0.001). There was both a slight, but not significant, increase in body temperature and decrease in forced expiratory volume in 1 s (FEV1). Neither prednisolone nor cilomilast had protective effect on the LPS-induced airways’ inflammation. The LPS-induced CRP acute-phase protein of inflammation (0.58±0.13 and 3.52±0.41 mg/dL, before and after LPS, respectively) was significantly inhibited by a pre-treatment with prednisolone (1.39±0.32 mg/dL, p<0.01) and attenuated (2.65±0.30 mg/dL, p=0.09) with cilomilast. Conclusion In healthy subjects, while the LPS-induced airways’ inflammation was not modified either by oral prednisolone or by PDE-4 inhibitor cilomilast (at actual dosage), the LPS-induced acute phase of blood inflammation was reduced by prednisolone. [less ▲]

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See detailRelationship between the evolution of the shoreline and the Posidonia oceanica meadow limit in a Sardinian coastal zone
Tigny, V.; Ozer, André ULg; De Falco, G. et al

in Journal of Coastal Research (2007), 23(3), 787-793

Important environmental changes have been observed for some coastal processes in the Gulf of Oristano (west coast of Sardinia, Italy). With remote sensing as the principal tool, this study aims to assess ... [more ▼]

Important environmental changes have been observed for some coastal processes in the Gulf of Oristano (west coast of Sardinia, Italy). With remote sensing as the principal tool, this study aims to assess littoral evolution over time (1977-2000) and to evaluate whether there is a relationship between the evolutionary trend of the shoreline and that of the upper limit of the Posidonia oceanica (L.) Delile meadow. Results show that some portions of the coastline, mainly located on the sandy part of the littoral, have encountered significant variations that can be partially related to the evolution of the upper limit of the P. oceanica meadow. Mainly of natural origins, this evolutionary trend has also been related to anthropogenic pressures put on the seagrass meadow. This finding confirms that Posidonia meadows significantly affect the littoral geomorphology, providing biogenic sediments, controlling beach slope, and acting as a '' brake '' on coastal water masses. [less ▲]

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See detailDiagnostic différentiel des souffles cardiaques en période néonatale chez le poulain
Amory, Hélène ULg

in Nouveau Praticien Vétérinaire Equine (2007)

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See detailCannibalism in Anchovy (Engraulis encrasicolus) in the North Aegean Sea (Greece)
Gennotte, Vincent ULg; Torre, Michele; Kallianiotis, Argyris

Poster (2007)

Egg and larval cannibalism was characterized in the European anchovy (Engraulis encrasicolus) during the spawning season in the North Aegean Sea. About 3 % of the sampled fish had consumed eggs and 7 ... [more ▼]

Egg and larval cannibalism was characterized in the European anchovy (Engraulis encrasicolus) during the spawning season in the North Aegean Sea. About 3 % of the sampled fish had consumed eggs and 7 % larvae. Egg consumption was observed during the night and larval consumption during the day. Cannibalism seems to be an opportunistic feeding strategy of anchovy, depending on prey availability and proximity of adults, larvae and eggs in relation with the diel vertical migrations of the fish. [less ▲]

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See detailImpact of microbial activities on the mineralogy and performance of column-scale permeable reactive iron barriers operated under two different redox conditions
Van Nooten, Thomas; Lieben, François; Dries, Jan et al

in Environmental Science & Technology (2007), 41(16), 5724-5730

The present study focuses on the impact of microbial activities on the performance of various long-term operated laboratory-scale permeable reactive barriers. The barriers contained both aquifer and Fe-0 ... [more ▼]

The present study focuses on the impact of microbial activities on the performance of various long-term operated laboratory-scale permeable reactive barriers. The barriers contained both aquifer and Fe-0 compartments and had received either sulfate or iron(Ill)-EDTAto promote sulfatereducing and iron(Ill)-reducing bacteria, respectively. After dismantlement of the compartments after almost 3 years of operation, DNA-based PCR-DGGE analysis revealed the presence of methanogenic, sulfate-reducing, metalreducing, and denitrifying bacteria within as well as up- and downgradient of the Fe-0 matrix. Under all imposed conditions, the main secondary phases were vivianite, siderite, ferrous hydroxy carbonate, and carbonate green rust as found by scanning electron microscopy (SEM) combined with energy dispersive X-ray analysis (EDX), and X-ray diffraction (XRD). Under sulfate-reduction promoting conditions, iron sulfides were formed in addition, resulting in 7 and 10 times higher degradation rates for PCE and TICE, respectively, compared to unreacted iron. These results indicate that the presence of sulfate-reducing bacteria in or around iron barriers and the subsequent formation of iron sulfides might increase the barrier reactivity. [less ▲]

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See detailWithin-Population Genetic Structure And Clonal Diversity Of A Threatened Endemic Metallophyte, Viola Calaminaria (Violaceae)
Bizoux, Jean-Philippe ULg; Mahy, Grégory ULg

in American Journal of Botany (2007), 94(5), 887-895

We studied the within-population genetic structure and the clonality extent of Viola calaminaria, a rare endemic species of calamine soils, by means of RAPD markers in two populations (one recent and one ... [more ▼]

We studied the within-population genetic structure and the clonality extent of Viola calaminaria, a rare endemic species of calamine soils, by means of RAPD markers in two populations (one recent and one ancient) with expected harsh and heterogeneous heavy-metal stress. At a very local scale (0.2 3 m), clonal propagation was detected in both populations, but the levels of clonal diversity were high (number of genets/number of ramets sampled ¼ 0.9 [recent] and 0.76 [ancient]) and the maximal observed extension of the clones was 0.4 m. This indicated that clonality is not, for the species, an important mode of propagation and that clonal growth cannot be interpreted as a strategy for propagating or perpetuating adapted genotypes under harsh ecological constraints. Spatial autocorrelations revealed a significant (P , 0.001) negative value of correlogram slope in the two populations even when a single individual per clone was considered (i.e., analysis at the genet level). We conclude that spatial genetic structure at a very local scale reflects limited gene flow due to restricted seed dispersal rather than variation in clonal pattern in response to environmental heterogeneity. At a larger scale (2–30 m), spatial autocorrelations revealed a positive (P , < 0.001) correlation at , 3 m and a random pattern at larger distances for the two populations. This suggested a patchy distribution of the genetically linked individuals associated with a disrupted pattern at a longer distance probably due to gene flow by pollen dispersal and a seed bank effect. The implications for the conservation of V. calaminaria are discussed. [less ▲]

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See detailCharlotte Joulia
Tomasovic, Dick ULg

in Aubenas, Jacqueline (Ed.) Filmer la danse (2007)

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See detailLa gestión del medio ambiente: aporte teóricos y metodológicos de la sociología en el caso del desarrollo ecoturístico de la Vía Parque Isla de Salamanca
Escobar Jimenez, Kelly ULg

Master's dissertation (2007)

Este trabajo estudia los procesos de gestión ambiental relacionados con el desarrollo ecoturístico de la VIPIS. Para esto se analizan las interacciones de los actores de la VIPIS y sus formas de ... [more ▼]

Este trabajo estudia los procesos de gestión ambiental relacionados con el desarrollo ecoturístico de la VIPIS. Para esto se analizan las interacciones de los actores de la VIPIS y sus formas de apropiación y utilización del medio ambiente; se exploran las posibilidades del desarrollo ecoturístico negociado en la VIPIS; y analizando el trasfondo del concepto de comunidad, y reflexionando sobre los tipos de participación para el caso del Parque Natural, se propone y explora la “Gestión ambiental Comunitaria”. A lo largo del texto se presentan los aportes metodológicos y teóricos de la sociología en el campo de la gestión ambiental. [less ▲]

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