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See detailImpact of the invasive alien plant Solidago giganteaon primary productivity, plant nutrient content and soil mineral nutrient concentrations
Vanderhoeven, SONIA ULg; Dassonville, Nicolas; Chapuis-Lardy, Lydie et al

in Plant and Soil (2006), 286(1-2), 259-268

Invasion by alien plants can alter ecosystem processes and soil properties. In this study, we compared aboveground productivity, nutrient pools in standing biomass and topsoil (0-0.10 m) mineral nutrient ... [more ▼]

Invasion by alien plants can alter ecosystem processes and soil properties. In this study, we compared aboveground productivity, nutrient pools in standing biomass and topsoil (0-0.10 m) mineral nutrient concentrations between plots invaded by Early Goldenrod (Solidago gigantea) and adjacent, uninvaded, vegetation at five sites in Belgium. The five sites were characterised by a resident perennial herbaceous vegetation and spanned a wide range in soil fertility level and floristic composition. Invaded stands consistently had higher (2-3-fold) aboveground productivity and lower mineral element concentrations in standing phytomass. Nutrient pools (calculated as concentration x phytomass) was ca. twice higher in invaded plots, suggesting that S. gigantea might enhance nutrient cycling rates. Impacts on topsoil chemistry were surprisingly modest, with slightly higher nutrient concentrations under the invader. A noticeable exception was phosphorus, which showed higher concentrations of ammonium acetate-extractable fraction in invaded plots in four of five sites. It appears that S. gigantea does not significantly contribute to nutrient uplift from deep soil layers to topsoil, possibly because it does not root much deeper compared to resident vegetation. [less ▲]

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See detailImpact of acute cadmium exposure on the trunk lateral line neuromasts and consequences on the "C-start" response behaviour of the sea bass (Dicentrarchus labrax L.; Teleostei, Moronidae).
Faucher, Karine ULg; Fichet, Denis; Miramand, Pierre et al

in Aquatic Toxicology (2006), 76(3-4), 278-94

Behavioural responses of sea bass Dicentrarchus labrax were investigated after exposure to cadmium ions in laboratory-controlled conditions. The aim of this study was to discover whether environmental ... [more ▼]

Behavioural responses of sea bass Dicentrarchus labrax were investigated after exposure to cadmium ions in laboratory-controlled conditions. The aim of this study was to discover whether environmental exposure to cadmium ions inactivates fish lateral line system neuromasts, and to determine the behavioural consequences of such a sensory blockage. For this, fish escape behaviour in response to an artificial water jet was recorded using a 25-frames s(-1) analog video camera before and after cadmium exposure. Experimental set up was tested with fish whose lateral line system was artificially inactivated by antibiotics (gentamicin and streptomycin). Histological analyses with scanning electron microscopy showed antibiotic treatment destroyed lateral line system neuromasts. In addition, these fish did not respond to stimulations provoked by the water jet after antibiotic treatment. Fish escape behaviour was then recorded before and after cadmium exposure at two different concentrations. When fish were exposed to the first concentration of cadmium tested (0.5 microg l(-1), which represents the maximal cadmium concentration encountered in contaminated estuaries), no alteration in neuromast tissue was observed. In addition, before cadmium exposure, fish responded positively in 98.41 +/- 4.95% of lateral line system stimulations (escape behaviour in response to the water jet). After cadmium exposure, no behavioural modification could be detected: the fish responded positively in 95.16 +/- 9.79% of stimulations (chi(2) = 2.464, p = 0.116). In contrast, the high cadmium concentration used (5 microg l(-1), which represents 10 times the concentration occurring in highly polluted estuarine areas) involved severe neuromast tissue damage. Just after such cadmium exposure, fish showed only 41.67 +/- 35.36% of positive responses to their lateral line system stimulations, while they responded positively in 95.93 +/- 9.10% of stimulations under control conditions (chi(2) = 24.562, p < 0.0001). Their lateral line system neuromasts seemed to regenerate about 1 month after cadmium exposure. Associated with this regeneration, from the 21st day after cadmium exposure, their escape behaviour had recovered and was not significantly different from that recorded under control conditions (86.74 +/- 20.82%, chi(2) = 2.876, p = 0.090). This study shows that although 5 microg l(-1) cadmium is able to damage lateral line system neuromasts and causes fish behavioural alterations, fish exposed to 0.5 microg l(-1) cadmium displayed neither tissue neuromast nor behavioural modification. [less ▲]

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See detailL'évaluation des projets de prévention des assuétudes
Absil, Gaëtan ULg; Vandoorne, Chantal ULg; Coupienne, Valérie et al

in Observatoire : Revue d'Action Sociale & Médico-Sociale (2006), (51-52), 139-145

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See detailApplication of magnetic susceptibility on different carbonate platform type
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg; Mabille, Cédric ULg

in Abstract book 17th ISC - Fukuoka, Japan - 2006 (2006)

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See detailDINEOF reconstruction of clouded images including error maps. Application to the Sea-Surface Temperature around Corsican Island
Beckers, Jean-Marie ULg; Barth, Alexander ULg; Alvera Azcarate, Aïda ULg

in Ocean Science (2006), 2

We present an extension to the Data INterpolating Empirical Orthogonal Functions (DINEOF) technique which allows not only to fill in clouded images but also to provide an estimation of the error ... [more ▼]

We present an extension to the Data INterpolating Empirical Orthogonal Functions (DINEOF) technique which allows not only to fill in clouded images but also to provide an estimation of the error covariance of the reconstruction. This additional information is obtained by an analogy with optimal interpolation. It is shown that the error fields can be obtained with a clever rearrangement of calculations at a cost comparable to that of the interpolation itself. The method is presented on the reconstruction of sea-surface temperature in the Ligurian Sea and around the Corsican Island (Mediterranean Sea), including the calculation of inter-annual variability of average surface values and their expected errors. The application shows that the error fields are not only able to reflect the data-coverage structure but also the covariances of the physical fields. [less ▲]

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See detailGenomic structure of new Tunisian peach latent mosaic viroid variants.
Hassen, I Fekih; Massart, Sébastien ULg; Roussel, S. et al

in Communications in agricultural and applied biological sciences (2006), 71(3 Pt B), 1257-1265

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See detailSelection of antagonists against Penicillium expansum and Botrytis cinerea, two postharvest apple parasites
Achbani, E. H.; Mounir, R.; El Jaafari, S. et al

Conference (2006)

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See detailStudy of the combined effects of temperature, pH and Aw on the growth rate of Trichoderma asperellum using a response surface methodology
Begoude, B. A. D.; Lahlali, R.; Friel, D. et al

Poster (2006)

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See detailTargeted calretinin expression in granule cells of calretinin-null mice restores normal cerebellar functions
Bearzatto, Bertrand; Servais, Laurent; Roussel, Céline et al

in FASEB Journal (2006), 20

SPECIFIC AIMS Inactivation of gene coding for calretinin, a calcium binding protein acting as a fast calcium buffer, deeply altered the cerebellar physiology leading to motor discoordination. Although ... [more ▼]

SPECIFIC AIMS Inactivation of gene coding for calretinin, a calcium binding protein acting as a fast calcium buffer, deeply altered the cerebellar physiology leading to motor discoordination. Although mechanistic hypotheses have been proposed to explain these alterations, the widespread expression of calretinin in the whole central nervous system and its expression in several neuronal types in the cerebellar circuitry preclude a precise mechanistic demonstration. The aim of this study was to determine to what extent the expression of calretinin in a specific neuronal cell type, the cerebellar granule cells, contributes to the phenotype detected in calretinin knockout (Cr–/–) mice. To achieve this objective, we constructed transgenic Cr–/– mice exhibiting a selective re-expression of Cr in granule cells (hereafter referred to as Cr-rescue) through the promoter function of the GABAA receptor {alpha}6 subunit gene. [less ▲]

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See detailTwo PR-1 loci detected in the native cultivated potato Solanum phureja appear differentially expressed upon challenge by late blight
Evers, Danièle; Schweitzer, C.; Nicot, N. et al

in Physiological and Molecular Plant Pathology (2006), 67(3-5, SEP-OCT), 155-163

Plant pathogenesis-related proteins are toxic to invading pathogens. Among them, the Subfamily PR-1 represents low-molecular weight proteins of unknown biochemical function. Here, we describe the cloning ... [more ▼]

Plant pathogenesis-related proteins are toxic to invading pathogens. Among them, the Subfamily PR-1 represents low-molecular weight proteins of unknown biochemical function. Here, we describe the cloning and isolation of two PR-1 genes (PR-1b1 (GenBank accession no. SPH493450) and PR-1b2 (SPH493451)) that encode predicted basic proteins. We isolated them from Solanum phureja, a native Andean potato with horizontal resistance to late blight, caused by the oomycete Phytoplithora infestans. We demonstrate that the PR-1 genes belong to a small multigene family with an estimated copy number of 4-6 with one of them located oil chromosome IX as determined by genetic mapping. The expression of PR-1 genes was different in late blight resistant and Susceptible genotypes. Therefore, we propose that both PR-1 genes may play a role in horizontal late blight resistance of S. phureja. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

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See detailComment je traite...des cors et des callosités.
Hermanns-Lê, Trinh ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2006), 61(7-8), 545-7

Corns and callosities are the expression of a peculiar aspect of mecanobiology of the foot. They are more frequent with ageing, particularly in women. These lesions represent a risk factor for the ... [more ▼]

Corns and callosities are the expression of a peculiar aspect of mecanobiology of the foot. They are more frequent with ageing, particularly in women. These lesions represent a risk factor for the diabetic foot. Prevention measures are important to follow in predisposed individuals. Several medicinal and non medicinal treatments have proven their efficacy. [less ▲]

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See detailComment j'explore... une perte de cheveux chez un patient cancéreux. Le trichogramme.
Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue de l’Association Belge des Technologues de Laboratoire = Tijdschrift van de Belgische Vereniging van Laboratoriumtechnologen (2006), 33

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See detailConclusions des actes du colloque "Le coton dans tous ses états"
Burny, Philippe ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2006), 10(4), 373-374

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See detailDistance intertextuelle et classement des textes d'après leur structure : méthodes de découpage et analyses arborées
Longrée, Dominique ULg; Mellet, Sylvie; Luong, Xuan

in Viprey, Jean-Marie; Condé, Claude; Lelu, A. (Eds.) et al JADT 2006, 8èmes Journées internationales d’Analyse statistique des Données Textuelles (2006)

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See detailDegré d'atteinte nerveuse périphérique dans la SLA, la SLP et la maladie de Kennedy
WANG, François-Charles ULg; Le Forestier, Nadine; GERARD, Pascale ULg et al

in Neurophysiologie Clinique = Clinical Neurophysiology (2006)

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See detailLes « burins » de l’atelier de débitage aurignacien de Maisières-Canal (Province du Hainaut, Belgique)
Flas, Damien ULg; Miller, Rebecca ULg; Jacobs, Benjamin

in de Araujo Igreja, Marina; Bracco, Jean-Pierre; Le Brun-Ricalens, Foni (Eds.) Burins préhistoriques : formes, fonctionnements, fonctions (2006)

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