Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailA four-year inventory of the invasive ladybeetle Harmonia axyridis in agricultural ecosystems
Vandereycken, Axel ULg; Durieux, Delphine ULg; Joie, Emilie ULg et al

Conference (2013, October 26)

The Multicoloured Asian Ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae) is known to thrive principally in shrubby and arboreal habitats. Its occurrence in agroecosystems remains poorly ... [more ▼]

The Multicoloured Asian Ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae) is known to thrive principally in shrubby and arboreal habitats. Its occurrence in agroecosystems remains poorly documented. This study focuses on the occurrence of this exotic species and its seasonal abundance in various field crops. The abundance of adults and larvae of H. axyridis was evaluated over a four-year period, from 2009 to 2012, in four important agronomical crops (wheat, corn, broad bean and potato) in Belgium. A total of 28 aphid predator species were observed including 14 coccinellid species, 13 hoverfly species and one lacewing species. H. axyridis is present and reproduces in all of the four crops studied, with the largest numbers recorded in corn and broad bean crops. In corn, H. axyridis numbers were found to increase over the four inventoried year, reaching 86% of the aphid predators in 2012, while it represented only 15% in 2009. H. axyridis was not always recorded where aphids were abundant, e.g. aphids were abundant on wheat where no H. axyridis were recorded. H. axyridis starts reproducing after the peak in aphid population, suggesting that H. axyridis is able to complete its development by feeding on alternative prey such as larvae and pupae of the same and other species of ladybird and other aphidophagous species. H. axyridis is often considered to be bivoltine but it only completes one generation per year in field crops. The second generation generally develops late in the season in other habitats. Harmonia axyridis is an invasive and an intraguild predator present in high quantities in some specific crops. In these crops, H. axyridis could negatively impact on population of native species due to IGP observed in several other studies. [less ▲]

Detailed reference viewed: 31 (4 ULg)
Full Text
See detailFourest, Georges
Robert, Laurent ULg

E-print/Working paper (2006)

Notice bio-bibliographique sur Georges Fourest

Detailed reference viewed: 22 (0 ULg)
Full Text
Peer Reviewed
See detailFourfold basal plane anisotropy of the nonlocal magnetization of YNi2B2C
Civale, L.; Silhanek, Alejandro ULg; Thompson, J. R. et al

in Physical Review Letters (1999), 83(19), 3920-3923

Studies of single crystal YNi2B2C have revealed a fourfold anisotropy of the equilibrium maenetization in the square crystallographic basal plane. This pi/2 periodicity occurs deep in the superconductive ... [more ▼]

Studies of single crystal YNi2B2C have revealed a fourfold anisotropy of the equilibrium maenetization in the square crystallographic basal plane. This pi/2 periodicity occurs deep in the superconductive mixed state. In this crystal symmetry, an ordinary superconductive mass anisotropy (as in usual London theory) allows only a constant, isotropic response. In contrast, the experimental results are well described by generalized London theory incorporating nonlocal electrodynamics, as needed for this clean, intermediate-kappa superconductor. [less ▲]

Detailed reference viewed: 6 (4 ULg)
Peer Reviewed
See detailFourier Methods for High-Frequency Surface Scattering
Geuzaine, Christophe ULg

in Proceedings of the 7th International Symposium on Electric and Magnetic Fields (2006)

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailFourier Transform Infrared Spectrometry
Schneider, Matthias; Demoulin, Philippe ULg; Sussmann, Ralf et al

in Kämpfer, Niklaus (Ed.) Monitoring Atmospheric Water Vapour : Ground-Based Remote Sensing and In-situ Methods (2012)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailFourier transform infrared spectroscopic study of abhurite Sn21O6Cl16(OH)(14)
Jouen, Samuel; Lefez, Benoit; Sougrati, Moulay Tahar ULg et al

in Materials Chemistry & Physics (2007), 105(2-3), 189-193

Abhurite Sn21O6Cl16(OH)(14) is a tin oxy-hydroxychloride discovered in 1985 as a tin corrosion product formed after long immersion in seawater, has been synthesised and studied using FTIRAS analysis. The ... [more ▼]

Abhurite Sn21O6Cl16(OH)(14) is a tin oxy-hydroxychloride discovered in 1985 as a tin corrosion product formed after long immersion in seawater, has been synthesised and studied using FTIRAS analysis. The vibrational spectra obtained in transmission and reflectance modes of analysis are presented and compared to the vibrational spectra determined by Kramers-Kronig analysis. Transversal and longitudinal (TO and LO) optical modes have been identified. (c) 2007 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 42 (10 ULg)
Full Text
Peer Reviewed
See detailFourier transform mass spectrometry: A powerful tool for toxin analysis
Quinton, Loïc ULg; Le Caër, Jean-Pierre; Vinh, Joëlle et al

in Toxicon (2006), 47(6), 715-726

The crude venom of Conus virgo was analyzed by Fourier transform mass spectrometry (FTMS) using both nano-electrospray ionization and MALDI. The analyses were performed directly on the crude venom ... [more ▼]

The crude venom of Conus virgo was analyzed by Fourier transform mass spectrometry (FTMS) using both nano-electrospray ionization and MALDI. The analyses were performed directly on the crude venom, without chromatographic separation. The mass fingerprinting of the venom yielded 64 distinct molecular masses in the range 500-4500 Da with two major components at 1328.5142 and 1358.5592 Da. To facilitate the de novo sequencing of these compounds, the disulfide bonds of all components were reduced for the whole venom. The mass accuracy, resolution and sensitivity provided by FTMS were necessary to complete the sequencing of the two new peptides named ViVA and ViVB, that turned out to be conotoxins belonging to the T-superfamily, with the disulfide framework V. The peptides shared 80% similarity and as often observed for this class of compound, they were highly post-translationally modified: amidated C-terminus, pyroglutamic acid residue at the N-terminus and two disulfide bonds. Complementary online nano-LC-nano-ESI-FTMS experiments were undertaken. Among the 130 molecular masses found in the coupling experiments, only 45 were common with those obtained in the direct approach, which means that 21 compounds observed by nano-ESI-FTMS were not detected. This clearly shows that some discriminations against some classes of compounds occur when a chromatographic step is used before mass spectrometry. [less ▲]

Detailed reference viewed: 20 (2 ULg)
Peer Reviewed
See detailFourier Transform Spectroscopy in the Infrared Region
Biémont, Emile ULg

Conference (1997)

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailA Fourier-Based Solver for 3-D High-Frequency Surface Scattering Problems
Geuzaine, Christophe ULg

in Proceedings of the 12th IEEE Conference on Electromagnetic Field Computation, CEFC 2006 (2006)

Detailed reference viewed: 4 (1 ULg)
See detailThe Fourier-Kelvin Stellar Interferometer: Exploring Exoplanetary Systems with an Infrared Probe-class Mission
Barry, R. K.; Danchi, W. C.; Lopez, B. et al

in Coudé du Foresto, Vincent; Gelino, Dawn; Ribas, Ignasi (Eds.) Pathways Towards Habitable Planets (2010, October 01)

We report results of a recent engineering study of an enhanced version of the Fourier-Kelvin Stellar Interferometer (FKSI) that includes 1-m diameter primary mirrors, a 20-m baseline, a sun shield with a ... [more ▼]

We report results of a recent engineering study of an enhanced version of the Fourier-Kelvin Stellar Interferometer (FKSI) that includes 1-m diameter primary mirrors, a 20-m baseline, a sun shield with a ±45° Field-of-Regard (FoR), and 40K operating temperature. The enhanced FKSI is a two-element nulling interferometer operating in the mid-infrared (e.g. ˜ 5-15 μm) designed to measure exozodiacal debris disks around nearby stars with a sensitivity better than one solar system zodi (SSZ) and to characterize the atmospheres of a large sample of known exoplanets. The modifications to the original FKSI design also allows observations of the atmospheres of many super-Earths and a few Earth twins using a combination of spatial modulation and spectral analysis. [less ▲]

Detailed reference viewed: 18 (0 ULg)
Full Text
See detailLes fourmis du foot
Cloes, Marc ULg

in Culture, le Magazine Culturel de l'Université de Liège (2010)

En Communauté française de Belgique, une vingtaine de bénévoles sont nécessaires pour un club de football. Alors que depuis trente ou quarante ans, la société évolue vers toujours plus d'individualisme et ... [more ▼]

En Communauté française de Belgique, une vingtaine de bénévoles sont nécessaires pour un club de football. Alors que depuis trente ou quarante ans, la société évolue vers toujours plus d'individualisme et que l'argent tient une place déterminante, même dans le sport, ces bénévoles représentent un contre-pouvoir, défendant un autre système de valeur, où l'altruisme occupe une place importante. Motivés par la passion du sport, ils trouvent plaisir, épanouissement et reconnaissance sociale en donnant de leur temps, pour remplir diverses fonctions, plus ou moins importantes selon le statut amateur ou professionnel du club. Coup de chapeau à ces hommes et femmes de l'ombre à qui toutes les stars du football doivent une part de leur réussite et de leur gloire. [less ▲]

Detailed reference viewed: 22 (3 ULg)
See detailFournir un lait de qualité et diminuer ses mammites
Theron, Léonard ULg; Hanzen, Christian ULg

Conference given outside the academic context (2009)

Detailed reference viewed: 59 (4 ULg)
Peer Reviewed
See detailLes Fouronnais imaginaires
Verjans, Pierre ULg

in Etudes et recherches (1985), (n°33), 36

Detailed reference viewed: 20 (3 ULg)
See detailLes Fouronnais imaginaires
Verjans, Pierre ULg

in Ubac, Pierre (Ed.) Génération Fourons (1993)

Detailed reference viewed: 18 (1 ULg)
See detailFourons
Verjans, Pierre ULg

in Delforge, Paul; Destatte, Philippe; Libon, Micheline (Eds.) Encyclopédie du mouvement wallon - volume 2 (2001)

Detailed reference viewed: 24 (5 ULg)
Peer Reviewed
See detailLes fours de potiers mérovingiens découverts à Maastricht
Van Wersch, Line ULg

in Husi, Philippe; Hincker, Vincent (Eds.) actes du colloque international, La céramique du Haut Moyen Âge (Ve-Xe siècles) dans le nord-ouest de l’Europe. Bilan et perspectives dix ans après le colloque d’Outreau (2006)

Detailed reference viewed: 44 (6 ULg)
Full Text
Peer Reviewed
See detailFourth Belgian multicentre survey of antibiotic susceptibility of anaerobic bacteria
Wybo, Ingrid; Van den Bossche; Soetens, Oriane et al

in Journal of Antimicrobial Chemotherapy (2014), 69

Objectives: To collect recent data on the susceptibility of anaerobes to antimicrobial agents with known activity against anaerobes, and to compare them with results from previous Belgian multicentre ... [more ▼]

Objectives: To collect recent data on the susceptibility of anaerobes to antimicrobial agents with known activity against anaerobes, and to compare them with results from previous Belgian multicentre studies. Methods: Four hundred and three strict anaerobic clinical isolates were prospectively collected from February 2011 to April 2012 in eight Belgian university hospitals. MICs were determined by one central laboratory for 11 antimicro- bial agents using Etest methodology. Results: According to EUCAST breakpoints, .90% of isolates were susceptible to amoxicillin/clavulanate (94%), piperacillin/tazobactam (91%), meropenem (96%), metronidazole (92%) and chloramphenicol (98%), but only 70% and 40% to clindamycin and penicillin, respectively. At CLSI recommended breakpoints, only 71% were sus- ceptible to moxifloxacin and 79% to cefoxitin. MIC50/MIC90 values for linezolid and for tigecycline were 1/4 and 0.5/ 4 mg/L, respectively. When compared with survey data from 2004, no major differences in susceptibility profiles were noticed. However, the susceptibility of Prevotella spp. and other Gram-negative bacilli to clindamycin decreased from 91% in 1993 – 94 and 82% in 2004 to 69% in this survey. Furthermore, the susceptibility of clostridia to moxifloxacin decreased from 88% in 2004 to 66% in 2011 – 12 and that of fusobacteria from 90% to 71%. Conclusions: Compared with previous surveys, little evolution was seen in susceptibility, except a decline in activity of clindamycin against Prevotella spp. and other Gram-negative bacteria, and of moxifloxacin against clostridia. Since resistance was detected to all antibiotics, susceptibility testing of anaerobic isolates is indicated in severe infections to confirm appropriateness of antimicrobial therapy. [less ▲]

Detailed reference viewed: 16 (2 ULg)
See detailFourth Catalogue of Stars Measured in the Long-Term Photometry of Variables Project (1992 - 1994).
Sterken, C.; Manfroid, Jean ULg; Beele, D. et al

in Fourth Catalogue of Stars Measured in the Long-Term Photometry of Variables Project (1992 - 1994)., by Sterken, C.; Manfroid, J.; Beele, D.; de Koff, S.; Eggenkamp, I. M. M. G.; Göcking, K.; Jorissen, A.; Kaufer, A.; Kuss, C.; Schoenmakers, A. P.; Stil, J. M.; van Loon, J.; Vink, J.; Vrielmann, S.; Wälde, E.. European Southern Observatory, Garching (Germany), Apr 1995, 198 p., (1995)

In this catalogue the authors present the photometric data in the Strömgren photometric system obtained during the period June 18, 1992 - August 23, 1994 in the framework of the Long-Term Photometry of ... [more ▼]

In this catalogue the authors present the photometric data in the Strömgren photometric system obtained during the period June 18, 1992 - August 23, 1994 in the framework of the Long-Term Photometry of Variables (LTPV) program at the European Southern Observatory. The catalogue is available in computer readable form at the Centre de Données de Strasbourg. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
See detailA fourth level of Frasnian carbonate mounds along the south side of the Dinant Synclinorium (Belgium)
Boulvain, Frédéric ULg; Coen-Aubert, M.

in Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre (2006), 76

An additional level of Frasnian mounds has been recognized in the La Boverie quarry at Rochefort and in four boreholes drilled in the Nord quarry at Frasnes, on the south side of the Dinant Synclinorium ... [more ▼]

An additional level of Frasnian mounds has been recognized in the La Boverie quarry at Rochefort and in four boreholes drilled in the Nord quarry at Frasnes, on the south side of the Dinant Synclinorium. It occurs between the Arche and Lion Members belonging respectively to the Moulin Liénaux and Grands Breux Formations, in the middle part of the stage. The new name of La Boverie Member is introduced at the top of the Moulin Liénaux Formation, for the deposits lying between the Arche and Bieumont Members; the latter is the basement of the Lion mound. The same succession has been observed in the sections of Moulin Bayot close to Vodelée, in the southeastern part of the Philippeville Anticlinorium. The La Boverie Member starts with rather deep bioclastic sediments, after the collapse of the carbonate factory at the top of the Arche mound. In the upper part of the lithostratigraphic unit, there is a thin buildup characterized by relatively shallow facies. The solitary rugose corals Macgeea boveriensis n. sp., M. socialis SOSHKINA, 1939 and Sinodisphyllum posterum (IVANIA, 1965) collected in the lower part of the La Boverie Member are described in detail whereas the revision of S. kielcense (ROZKOWSKA, 1979) occurring in the Bieumont Member is also provided. [less ▲]

Detailed reference viewed: 37 (7 ULg)