References of "2011"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailEffect of pH and water activity on the growth limits of Listeria monocytogenes in a cheese matrix at two contamination levels.
Schvartzman Echenique, Maria Sol ULg; Belessi, C.; Butler, F. et al

in Journal of food protection (2011), 74(11), 1805-13

Listeria monocytogenes can proliferate at the beginning of cheesemaking as the conditions favor growth. The objective of this study was to establish the growth limits of L. monocytogenes in a cheese ... [more ▼]

Listeria monocytogenes can proliferate at the beginning of cheesemaking as the conditions favor growth. The objective of this study was to establish the growth limits of L. monocytogenes in a cheese matrix, in case of potential contamination of the milk prior to cheese manufacture. A semisoft laboratory scale model cheese system was made at different initial pH and water activity (a(w)) levels with a mix of two strains of L. monocytogenes. A factorial design of five pH values (5.6 to 6.5), four a(w) values (0.938 to 0.96), and two L. monocytogenes inoculation levels (1 to 20 CFU/ml and 500 to 1,000 CFU/ml) was carried out. Each combination was evaluated in six independent replicates. In order to determine if there was a dominant strain, isolated colonies from the cheeses were analyzed by pulsed-field gel electrophoresis. The data relating to growth initiation were fitted to a logistic regression model. The a(w) of milk influenced the probability of growth initiation of L. monocytogenes at both low and high contamination levels. The pH, at the concentrations tested, had a lower effect on the probability of growth initiation. At pH 6.5 and a(w) of 0.99 for low contamination levels and pH 6.5 and a(w) of 0.97 for high contamination levels, increases in population of up to 4 and 2 log were observed at low and high contamination levels, respectively. This shows that if conditions are favorable for growth initiation at the early stages of the cheesemaking process, contamination of milk, even with low numbers, could lead to L. monocytogenes populations that exceed the European Union's microbiological limit of 100 CFU/g of cheese. [less ▲]

Detailed reference viewed: 25 (2 ULg)
Full Text
Peer Reviewed
See detailK-type geomagnetic index nowcast with data quality control
Stankov, Stanimir; Stegen, Koen; Warnant, René ULg

in Annals of Geophysics = Annali di Geofisica (2011), 54(3), 285-295

Detailed reference viewed: 44 (7 ULg)
Full Text
Peer Reviewed
See detailA naming convention for the Piano Key Weirs geometrical parameters
Pralong, Julien; Vermeulen, Julien; Blancher, Benoit et al

in Erpicum, Sébastien; Laugier, Frédérique; Boillat, Jean-Louis (Eds.) et al Labyrinth and Piano Key Weirs - PKW 2011 (2011)

Flood management is more than ever an issue for dam designers and engineering consulting firms in charge of rehabilitation works. Piano Key Weirs are a new cost-effective type of spillway designed to ... [more ▼]

Flood management is more than ever an issue for dam designers and engineering consulting firms in charge of rehabilitation works. Piano Key Weirs are a new cost-effective type of spillway designed to improve dams discharge capacity. These structures are particularly attractive: they can easily be built on existing structures and enable very high discharge capacities. Therefore, Piano Key Weirs are nowadays studied worldwide. Piano Key Weir description involves a lot of geometrical parameters (more than 30), which designations are not already universally defined. A naming convention is required to enhance exchanges and cooperation between the numerous developers. A naming convention has been developed at EDF – Hydro Engineering Center in cooperation with the Laboratory of Hydraulic Constructions (LCH), Ecole Polytechnique Fédérale de Lausanne and the Laboratory of Hydrology, Applied Hydrodynamics and Hydraulic Constructions (HACH), University of Liege. This paper describes the proposed naming convention and gives definitions and notations of the various geometrical parameters. This work represents a first attempt which should be updated with the contribution of stakeholders involved in this topic. [less ▲]

Detailed reference viewed: 267 (8 ULg)
Full Text
Peer Reviewed
See detailA new Barremian (Early Cretaceous) ichthyosaur from western Russia
Fischer, Valentin ULg; Masure, Edwige; Arkhangelsky, Maxim et al

in Journal of Vertebrate Paleontology (2011), 31(5), 1010-1025

A new ophthalmosaurid ichthyosaur, Sveltonectes insolitus gen. et sp. nov., is described from a sub-complete and three-dimensionally preserved specimen from the late Barremian of western Russia. This new ... [more ▼]

A new ophthalmosaurid ichthyosaur, Sveltonectes insolitus gen. et sp. nov., is described from a sub-complete and three-dimensionally preserved specimen from the late Barremian of western Russia. This new taxon is supported by 11 cranial, dental, and postcranial autapomorphies, and is also characterized by features previously considered as autapomorphic for some other Ophthalmosauridae, such as a processus narialis on the prefrontal and relatively long hindfins with pre- and postaxial accessory digits. We conducted a new phylogenetic analysis of Thunnosauria, which supports a ‘Stenopterygius-origin’ for Ophthalmosauridae. Sveltonectes is regarded as the sister taxon of Aegirosaurus, which shares a similar skull roof construction. Contrary to most other Cretaceous ichthyosaurs, Sveltonectes is characterized by delicate and sharply pointed teeth, confirming that the Ophthalmosauridae were ecologically highly diversified during the Early Cretaceous [less ▲]

Detailed reference viewed: 59 (9 ULg)
See detailLes Wallons du Wisconsin: nos cousins d'Amérique ont émigré il y a 150 ans
Lempereur, Françoise ULg

Book published by SPW - 2ème éd. en 2012 (2011)

Ce livre se veut un hommage à ceux qui, à plus de 5000 kilomètres de la Wallonie, ont, durant 150 ans, gardé la langue, les chants, les récits, les savoir-faire et les modes de vie de leurs ancêtres. Il ... [more ▼]

Ce livre se veut un hommage à ceux qui, à plus de 5000 kilomètres de la Wallonie, ont, durant 150 ans, gardé la langue, les chants, les récits, les savoir-faire et les modes de vie de leurs ancêtres. Il se veut aussi un outil pour ceux qui, sans attache particulière avec ces familles, souhaitent savoir comment, en 1853, des fermiers brabançons ou namurois pouvaient traverser l'Atlantique, se bâtir une cabane de rondins en plein bois, lier des contacts amicaux avec les Indiens, conquérir des droits, etc. Il se veut enfin une réflexion sur l'importance de sauvegarder et de transmettre ce patrimoine, à la fois par l'écriture et par l'audiovisuel. [less ▲]

Detailed reference viewed: 117 (10 ULg)
Full Text
See detailProblèmes du bilinguisme dans l'Antiquité gréco-romaine
Rochette, Bruno ULg

in Genet, Jean-Philippe (Ed.) Langues et histoire. Actes du colloque de l'Ecole doctorale d'histoire de Paris 1 INHA, 20 et 21 octobre 2006 (2011)

Detailed reference viewed: 107 (0 ULg)
Full Text
Peer Reviewed
See detailDiscovering the lichen diversity of a remote tropical island: working list of species collected on Reunion (Mascarene archipelago, Indian Ocean)
Sérusiaux, Emmanuël ULg; van den Boom, Pieter P. G.; Brand, Maarten et al

in Herzogia (2011), 24(2), 325-349

463 lichen taxa are reported from the island of Reunion (Mascarene archipelago) in the Indian Ocean. This report is based on extensive collections recently made by the authors or hosted in B and LG. A ... [more ▼]

463 lichen taxa are reported from the island of Reunion (Mascarene archipelago) in the Indian Ocean. This report is based on extensive collections recently made by the authors or hosted in B and LG. A total of c. 600 species is estimated for the number of lichenized fungi present on the island; although this is a low figure for a varied tropi- cal area, this is plausible due to its small size and remoteness. The significance of the lichen diversity of the island lays in its endemics, which need further study for a reliable assessment, and in the occurrence of a poorly known southern hemisphere element (“austral” species). The discovery of the following in Reunion is of special interest as it considerably enlarges their distribution range: Anzia corallophora, Caloplaca caesiosorediata, Coccocarpia delicatula, Fuscopannaria praetermissa, Gomphillus morchelloides, G. pedersenii, Gyalideopsis bispora, Heterodermia koyana, Hypotrachyna evansii, Lithogyalideopsis zeylandica, Lobaria asperula, Megaloblastenia marginiflexa var. dimota, Menegazzia capitata, Myeloconis erumpens and Pannaria squamulosa. [less ▲]

Detailed reference viewed: 240 (14 ULg)
See detailDuden - Deutsches Universalwörterbuch
Auberle, Anette; Eickhoff, Birgit; Haller-Wolf, Angelika et al

Book published by Dudenverlag - 7ème éd. (2011)

Detailed reference viewed: 161 (0 ULg)
Full Text
Peer Reviewed
See detailGlycemic Variability, Hypoglycemia and Organ Failure in the Glucontrol Study
Penning, Sophie ULg; Le Compte, Aaron J.; PREISER, Jean-Charles ULg et al

in 10th Belgian Day on Biomedical Engineering (2011)

Detailed reference viewed: 27 (3 ULg)
Full Text
Peer Reviewed
See detailPost-mortem examination and laboratory-based analysis for the diagnosis of bovine tuberculosis among dairy cattle in Ecuador
Proano-Perez, F.; Benitez-Ortiz, Washington; Desmecht, Daniel ULg et al

in Preventive Veterinary Medicine (2011), 101(1-2), 65-72

Detailed reference viewed: 26 (3 ULg)
Full Text
Peer Reviewed
See detail2D-Vertical Model for Free Surface Incompressible Flows: Validation and Applications
Detrembleur, Sylvain; Dewals, Benjamin ULg; Pirotton, Michel ULg

in Proc. 34th IAHR World Congress - Balance and Uncertainty (2011)

Efficient design of hydraulic structures such as weirs and bottom outlets requires a detailed description of the complex turbulent flows occurring on these structures. Compared to laboratory experiments ... [more ▼]

Efficient design of hydraulic structures such as weirs and bottom outlets requires a detailed description of the complex turbulent flows occurring on these structures. Compared to laboratory experiments, numerical modeling offers more flexibility and cost-effectiveness to test different designs. The non-hydrostatic 2D-vertical model presented here solves the RANS equations for incompressible flows in the vertical plane. It is based on the projection method for pressure-velocity coupling, while free surface tracking is conducted by means of the level set technique and Sussman’s velocity extension algorithm. It enables to predict accurately the flow pattern in the vertical plane and deals with multiple interfaces (jets, drops…). The solver has been validated for both steady and unsteady free surface flows, based on theoretical and experimental data. The paper will detail the application of the model to a pressurized flow and to a sloshing tank. [less ▲]

Detailed reference viewed: 49 (7 ULg)
Full Text
Peer Reviewed
See detailLe coma psychogène
DEBABECHE, Cécile ULg; PIETTE, Catherine ULg; Ansseau, Marc ULg et al

in Acta Psychiatrica Belgica (2011), 111(3), 20-25

Detailed reference viewed: 228 (5 ULg)
Full Text
Peer Reviewed
See detailDensity functional theory beyond the linear regime: Validating an adiabatic local density approximation
Helbig, N.; Fuks, J. I.; Casula, M. et al

in Physical Review. A (2011), 83

We present a local density approximation (LDA) for one-dimensional (1D) systems interacting via the soft-Coulomb interaction based on quantum Monte Carlo calculations. Results for the ground-state ... [more ▼]

We present a local density approximation (LDA) for one-dimensional (1D) systems interacting via the soft-Coulomb interaction based on quantum Monte Carlo calculations. Results for the ground-state energies and ionization potentials of finite 1D systems show excellent agreement with exact calculations obtained by exploiting the mapping of an N-electron system in d dimensions onto a single electron in N×d dimensions, properly symmetrized by the Young diagrams. We conclude that 1D LDA is of the same quality as its three-dimensional (3D) counterpart, and we infer conclusions about 3D LDA. The linear and nonlinear time-dependent responses of 1D model systems using LDA, exact exchange, and the exact solution are investigated and show very good agreement in both cases, except for the well-known problem of missing double excitations. Consequently, the 3D LDA is expected to be of good quality beyond the linear response. In addition, the 1D LDA should prove useful in modeling the interaction of atoms with strong laser fields, where this specific 1D model is often used. [less ▲]

Detailed reference viewed: 80 (6 ULg)
See detailLe tournant : la période vendéenne
Denis, Benoît ULg

in Vital, Christophe; Siret, Luc; Cousseau, Anne (Eds.) Georges Simenon (1903-1989). De la Vendée aux quatre coins du monde (2011)

Detailed reference viewed: 18 (2 ULg)
Full Text
Peer Reviewed
See detailOrganochlorine pesticides, polychlorinated biphenyls and trace elements in wild European sea bass (Dicentrarchus labrax) off European estuaries
Schnitzler, Joseph ULg; Thomé, Jean-Pierre ULg; Lepage, Mario et al

in Science of the Total Environment (2011), 409(19), 3680-3686

Polychlorinated biphenyls (PCBs) and organochlorine pesticides like dichloro-diphenyl-trichloroethane (DDTs), hexachlorocyclohexanes (HCHs), aldrin, dieldrin and trace elements (Cd, Cu, Se, Pb, Zn and Hg ... [more ▼]

Polychlorinated biphenyls (PCBs) and organochlorine pesticides like dichloro-diphenyl-trichloroethane (DDTs), hexachlorocyclohexanes (HCHs), aldrin, dieldrin and trace elements (Cd, Cu, Se, Pb, Zn and Hg) were analysed in the muscle of European sea bass (Dicentrarchus labrax) sampled in Atlantic coastal regions near several important European river mouths (Gironde, Charente, Loire, Seine and Scheldt). High contamination levels were measured in the muscles of European sea bass sampled in the coastal regions near those river mouths (e.g. Σ ICES PCB=133–10,478 μg kg−1 lw and Hg=250–2000 μg kg−1 dw). The Scheldt and the Seine are still among the most contaminated estuaries in Europe. Each region presented their specific contamination patterns reflecting different sources due to the input of the respective rivers. As fish and fishery products are the main contributors of the total dietary intake of organochlorinated pollutants, regular consumption of European sea bass with the reported contamination levels may represent a significant exposure route for the general human population. [less ▲]

Detailed reference viewed: 98 (25 ULg)
See detailProduire de façon durable et responsable
Schiffers, Bruno ULg; Samb, Babacar

Learning material (2011)

Detailed reference viewed: 39 (4 ULg)
Full Text
Peer Reviewed
See detailCrossing abilities of ALS Target-Site Resistant Black-grass (Alopecurus myosuroides HUDS.)
Maréchal, Pierre-Yves ULg; Henriet, François; Vancutsem, Françoise ULg et al

in Communications in Agricultural and Applied Biological Sciences (2011)

Black-grass crossings were conducted outdoor for two successive years in a way to determine the percentage of resistant black-grass that can be engendered in one generation, after the introduction of one ... [more ▼]

Black-grass crossings were conducted outdoor for two successive years in a way to determine the percentage of resistant black-grass that can be engendered in one generation, after the introduction of one Target-Site resistant individual. After germination, plants were genotyped and couples of resistant and susceptible individuals were formed, then planted outdoor and enclosed with a pollen-proof cloth to avoid any external pollen contamination. Seeds were collected and tested in glasshouses with herbicide spraying. DNA analyses were also performed on surviving plants to distinguish hetero- from homozygotes. The resistance level of the progeny seems to be fairly high and Mendelean distribution is generally confirmed. The offspring of self-crossings was also observed to assess the facultative autogamy ability, according to the genotype and the presence of mutant ALS alleles (position W-574). [less ▲]

Detailed reference viewed: 36 (4 ULg)