Last 7 days
Bookmark and Share    
Full Text
See detail9. Nutrition azotée de l'épeautre en Ardenne et en région limoneuse
Escarnot, Emmanuelle ULg; Meza Morales, Walter ULg; De Toffoli, Marc et al

in Bodson, Bernard; Destain, Jean-Pierre (Eds.) Livre blanc céréales (2014, February 26)

Detailed reference viewed: 10 (0 ULg)
Full Text
See detail10. Perspectives - 2. Perspectives offertes par la culture en association de froment et de pois protéagineux d'hiver
Pierreux, Jérome ULg; Delaplace, Pierre ULg; Roisin, Christian et al

in Bodson, Bernard; Destain, Jean-Pierre (Eds.) Livre Blanc céréales (2014, February 26)

Detailed reference viewed: 11 (0 ULg)
Full Text
See detailOn the use of Belgian Soil Map to predict risk of nitrate and pesticide lixiviation
Bah, Boubacar Billo ULg; Vandenberghe, Christophe ULg; Deneufbourg, Mathieu ULg et al

Poster (2014, February 26)

Pollution by nitrate and pesticides has impacts on drinking water reserves and aquatic systems. Nowadays, this problem is the key point of the European Policy with the implementation of the Water ... [more ▼]

Pollution by nitrate and pesticides has impacts on drinking water reserves and aquatic systems. Nowadays, this problem is the key point of the European Policy with the implementation of the Water Framework Directive (Directive 2000/60/EC). According to these legislations, Member States are supposed to take measures to limit environmental and toxicological effects caused by nitrate and pesticides use. This paper presents three different approaches allowing assessment of diffuse (non-point sources) pollution risks of water resources by nitrate and pesticides. The first approach consists on the interpretation of the geomorphopedological information (geologic substratum type, presence of karst phenomena, soil texture, natural drainage, profile development, type and percent of stoniness, soil thickness, …) provided by the Digital Soil Map of Wallonia. Soil physical characteristics are assessed in terms of soil water percolation/infiltration, runoff, pollutants retention, mineralization, and erosion. Second approach consists on the use of spatially distributed mechanistic models. Nitrate lixiviation from agricultural land to groundwater has been simulated from the SWAT model. Pesticide lixiviation from soil to groundwater has been predicted from the one-dimensional, dynamic, multi-layered model named PEARL (Pesticide Emission Assessment at Regional and Local scales). Model input parameters are mainly extracted from the existing soil physical and physico-chemical, crop and pesticides properties databases. Relevant soil parameters not directly available in existing databases, such as bulk density, hydraulic conductivity, potential evapotranspiration… have been derived from pedotransfers functions. Third approach consists on in situ lixiviation studies by the way of lysimeters. Concentrations measured at the bottom (2 m deep) of lysimeters represent a straight “index of risk” for groundwater and, on the other hand, allow the validation of simulation models used to predict nitrate and pesticides lixiviation risk under different scenarios. The Digital Soil Map of Wallonia, one of the core data source, allows the spatialisation of the predicted lixiviation risk at regional level, providing to the local authorities and the decision makers a tool for the identification of the areas at risk of pollution, where specific monitoring actions and prevention measures for the protection of waters can be implemented. [less ▲]

Detailed reference viewed: 26 (6 ULg)
Full Text
See detailLivre Blanc céréales
Destain, Jean-Pierre ULg; Bodson, Bernard ULg

Book published by Université de Liège (2014)

Detailed reference viewed: 16 (0 ULg)
Full Text
See detailEffects of Eisenia fetida on metal uptake of heavy metals from polluted soils by Vicia faba and Zea Mays
Lemtiri, Aboulkacem ULg; Liénard, Amandine ULg; Francis, Frédéric ULg et al

Poster (2014, February 26)

Earthworms are known to increase availability of heavy metals in soils and also play an important role in maintaining the structure and quality of soil. The introduction of earthworms into soils ... [more ▼]

Earthworms are known to increase availability of heavy metals in soils and also play an important role in maintaining the structure and quality of soil. The introduction of earthworms into soils contaminated with metals has been suggested as an aid for phytoremediation processes. In Belgium (Wallonia), a century of industrial metallurgic activities produced significant heavy metal soil pollution. A large q u a n t i t y o f s m e l t e r w a s t e c r e a t e d a g r a d i e n t o f zi n c, lead and cadmium c o n c e n t r a t i o n . The objectives of our study were to evaluate : (i) the potential toxicity of heavy metal elements on the epigeic earthworms Eisenia fetida and on two plants Zea mays and Vicia faba and (ii) to determine the effects of the earthworms on the growth and contaminants phytoextraction process. The combination of behavioural factor measurements (survival, growth, reproduction of earthworms), physico-chemical parameters such as metal absorption, bioaccumulation by earthworms, soil physico-chemical changes, and plant responses (root and shoot elongation, dried biomass,…) provided a valuable indication of pollutant bioavailability and ecotoxicity. After 56-days exposure, the results suggest that adult earthworms have a strong tolerance for heavy metals exposure, but the responses depend on metal elements. Earthworms modify the bioavailable heavy metals in root and shoot in the contaminated soils and their activities alter shoot and root biomass of V. faba and Z. mays. The presence of earthworms led to a change in physico-chemical caracteristics in contaminated soils. These results show that the ecological context for phytoremediation should be broadened by considering earthwom – plant – soil interactions as they influence both plant health and absorption of heavy metals. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailCosmological constraints on mirror matter parameters
Ciarcelluti, Paolo; Wallemacq, Quentin ULg

in Advances in High Energy Physics (2014), 2014

Up-to-date estimates of the cosmological parameters are presented as a result of numerical simulations of cosmic microwave background and large scale structure, considering a flat Universe in which the ... [more ▼]

Up-to-date estimates of the cosmological parameters are presented as a result of numerical simulations of cosmic microwave background and large scale structure, considering a flat Universe in which the dark matter is made entirely or partly of mirror matter, and the primordial perturbations are scalar adiabatic and in linear regime. A statistical analysis using the Markov Chain Monte Carlo method allows to obtain constraints of the cosmological parameters. As a result, we show that a Universe with pure mirror dark matter is statistically equivalent to the case of an admixture with cold dark matter. The upper limits for the ratio of the temperatures of ordinary and mirror sectors are around 0.3 for both the cosmological models, that show the presence of a dominant fraction of mirror matter, 0.06 < Ω_{mirror} h^2 < 0.12. [less ▲]

Detailed reference viewed: 18 (6 ULg)
Full Text
See detailTransferts thermo hydriques dans les matériaux de construction
Kahlerras, Loubna ULg

Scientific conference (2014, February 25)

Detailed reference viewed: 15 (3 ULg)
See detailDrug-delivery implants : Pharmaceutical advantages and current processing technologies
Champeau, Mathilde; Jérôme, Christine ULg; Tassaing, Thierry

Scientific conference (2014, February 25)

Detailed reference viewed: 10 (2 ULg)
See detailEU-Brazil Relationship: achievements and difficulties
Santander, Sébastian ULg

Scientific conference (2014, February 25)

Detailed reference viewed: 7 (0 ULg)
See detailLe Nucléaire... Une énergie dans le vent? - Ciné-débat autour du film d'Alain de Halleux, Welcome to Fukushima
Parotte, Céline ULg

Speech (2014)

Ciné-débat autour du film Welcome to Fukushima en présence du réalisateur, Alain de Halleux et avec Pierre Dewallef, chargé de cours à la faculté des Sciences Appliquées dans le département d’aérospatiale ... [more ▼]

Ciné-débat autour du film Welcome to Fukushima en présence du réalisateur, Alain de Halleux et avec Pierre Dewallef, chargé de cours à la faculté des Sciences Appliquées dans le département d’aérospatiale et mécanique – ULg Céline Parotte, assistante-doctorante au Centre de recherche Spiral – ULg Pablo Servigne, animateur et chercheur en éducation permanente à l’asbl Barricade Débat animé par Jérôme Jamin,co-directeur de la Maison des Sciences de l'Homme-ULg Organisation : la Maison des Sciences de l'Homme (ULg), l'asbl Barricade et la Coopérative Courant d'Air, sous l'impulsion de Laurence Farine (membre de TerreMaCulture) et avec le soutien de Réjouisciences. [less ▲]

Detailed reference viewed: 20 (3 ULg)
See detailHistoire des musiques africaines-américaines- partim LE BLUES pre 1945
Sacré, Robert ULg

Conference given outside the academic context (2014)

Racines africaines du blues ; chanteuses de blues classique ; blues rural ( Mississippi, Texas, East Coast) , blues urbain ( Memphis, Saint Louis, Chicago) pre-1945

Detailed reference viewed: 15 (1 ULg)
Full Text
See detailLes femmes migrantes et leur rôle dans la transmission des savoirs culinaires et des soins du corps.
Mescoli, Elsa ULg

Conference given outside the academic context (2014)

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailDark atoms and the positron-annihilation-line excess in the galactic bulge
Cudell, Jean-René ULg; Khlopov, Maxim; Wallemacq, Quentin ULg

in Advances in High Energy Physics (2014), 2014

It was recently proposed that stable particles of charge -2, O^{--}, can exist and constitute dark matter after they bind with primordial helium in O-helium (OHe) atoms. We study here in details the ... [more ▼]

It was recently proposed that stable particles of charge -2, O^{--}, can exist and constitute dark matter after they bind with primordial helium in O-helium (OHe) atoms. We study here in details the possibility that this model provides an explanation for the excess of gamma radiation in the positron-annihilation line from the galactic bulge observed by INTEGRAL. This explanation assumes that OHe, excited to a 2s state through collisions in the central part of the Galaxy, de-excites to its ground state via an E0 transition, emitting an electron-positron pair. The cross section for OHe collisions with excitation to 2s level is calculated and it is shown that the rate of such excitations in the galactic bulge strongly depends not only on the mass of O-helium, which is determined by the mass of O^{--}, but also on the density and velocity distribution of dark matter. Given the astrophysical uncertainties on these distributions, this mechanism constrains the O^{--} mass to lie in two possible regions. One of these is reachable in the experimental searches for stable multicharged particles at the LHC. [less ▲]

Detailed reference viewed: 20 (5 ULg)
Full Text
See detailÉvolutions multiples et intérêts nouveaux en matière de climatologie depuis 1970.
Erpicum, Michel ULg

Scientific conference (2014, February 25)

Evolution of the knowledge of the main variables of the climates of the Earth according to the recent evolution of the principal tools of climatology and instrumental data coming from international or ... [more ▼]

Evolution of the knowledge of the main variables of the climates of the Earth according to the recent evolution of the principal tools of climatology and instrumental data coming from international or national networks or from experimental measurements conducted in Climatological or Meteorological Institutes. [less ▲]

Detailed reference viewed: 31 (6 ULg)