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See detailUne approche statistique de la concurrence entre démonstratifs chez les historiens latins (César, Salluste, Tacite)
Longrée, Dominique ULg

in Bodelot, Colette (Ed.) Anaphore, cataphore et corrélation en latin, Actes de la Journée d'étude de Linguistique latine, Université Blaise Pascal - Clermont-Ferrand 2, 7 janvier 2003 (2004)

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See detailEffect of fertilisation with selenium on plasma selenium in Belgian Blue suckling cows and heifers: first results
Dufrasne, Isabelle ULg; Cabaraux, Jean-François ULg; Coenen, M. et al

in Land use systems in grassland dominated regions, 20th General Meeting of the European Grassland Federation (2004)

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See detailNEO 2003 EH_1, the Quadrantid Shower Parent
Jenniskens, P.; Lyytinen, E.; Jehin, Emmanuel ULg et al

in 35th COSPAR Scientific Assembly (2004)

Near Earth Object 2003 EH_1, first seen by LONEOS on 2003 March 6, was identified in early December as the parent of the Quadrantid shower based on the orbit calculated from 48 days of observations ... [more ▼]

Near Earth Object 2003 EH_1, first seen by LONEOS on 2003 March 6, was identified in early December as the parent of the Quadrantid shower based on the orbit calculated from 48 days of observations following its discovery [1]. The Quadrantids is our most intense annual shower and was until now the only major shower with no parent body. The orbit matches the inclination, semi-major axis, and argument of perihelion of the Quadrantid meteoroids, but has a perihelion distance outside of Earth orbit. It was shown that frequent close encounters with Jupiter result in a rapid dispersion of perihelion distances, accounting for the current orbit of the parent body. The dispersion of orbits in the meteor shower implies a young ˜ 500 year age and the large mass in the stream suggests formation during a comet breakup. This leaves open the possibility that comet C/1490 Y1 was a sighting of the object shortly after it broke up near aphelion, but to match the perihelion time with that of the backward integrated orbit of 2003 EH_1, a better orbit solution is needed. In December and January of 2003, we recovered the object with the ESO New Technology Telescope and computed a much improved orbit. We used that new orbit to study the formation of the Quadrantid stream for various epochs of ejection. In the context of evaluating the NEO impact hazard, those meteoroids trace the orbital evolution of other possible fragments from the breakup 500 years ago that may now be on a collision course with Earth. [1] P. Jenniskens, B.G. Marsden (2003) IAU Circular 8252 - December 08, 2003 (D.W.E. Green, ed.); P. Jenniskens (2004) 2003 EH_1 is the Quadrantid shower parent comet. Astronomical Journal (in press); http://leonid.arc.nasa.gov [less ▲]

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See detailComparison between co-crystallisation properties of POP and OPP
Danthine, Sabine ULg; tirtiaux, a; wouters, j et al

Poster (2004)

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See detailElaboration d’une typologie hydro-géomorphologique de cours d’eau dans l’Euregio Meuse-Rhin
Hallot, Eric ULg; Schmitt, L.; Mols, J. et al

in Mosella - XXIX, 3-4 (2004)

This paper shows the first results of a method of river hydro-geomorphological typology applied on the Euregio Maas-Rhine. This is based on non factorial multivariate analysis (clusters) of only ... [more ▼]

This paper shows the first results of a method of river hydro-geomorphological typology applied on the Euregio Maas-Rhine. This is based on non factorial multivariate analysis (clusters) of only quantitative data automatically extracted from DEM or obtained by field measurements with a simplified protocol. The regional differentiation of variables allows the automatic characterization of rivers especially with the specific stream power. [less ▲]

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See detailPosition of the Moesian platform at the Lochkovian. Hypothesis based on miospores
Steemans, Philippe ULg; Lakova, I.; Breuer, P.

Conference (2004)

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See detailProteomic and genomic analysis of Chlamydomonas reinhardtii complex 1: conserved components in eukaryotes
Cardol, Pierre ULg; Vanrobaeys, F.; Devreese, B. et al

in Biochimica et Biophysica Acta-Bioenergetics (2004), 1657(Suppl. 1), 41-42

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See detailNivelles et Namur : deux maisons francophones d’Annonciades aux Pays-Bas méridionaux (17e-18e s.)
Henneau, Marie-Elisabeth ULg

in Dinet, Dominique; Moracchini, Pierre; Portebos, Marie-Emmanuel (Eds.) Jeanne de France et l'Annonciade (2004)

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See detailDerivation of the rotational frequency of massive stars from seismic studies
Aerts, C.; Scuflaire, Richard ULg; Thoul, Anne ULg

in Stellar Rotation. 215 (2004)

In this contribution we review the current status of the determination of the rotational frequency in non-radially pulsating B stars, i.e. beta Cep stars and slowly pulsating B stars. Considerable ... [more ▼]

In this contribution we review the current status of the determination of the rotational frequency in non-radially pulsating B stars, i.e. beta Cep stars and slowly pulsating B stars. Considerable progress is currently being made in the understanding of the non-radial oscillations of main-sequence B Stars by means of high-temporal, high-spatial resolution spectroscopic time series. This has led to the detection of frequency multiplets, which are interpreted as rotationally splitted non-radial modes and which allow an accurate determination of the surface rotational frequency in some stars. We outline how our future goal, i.e. the derivation of the internal rotation frequency, can be achieved. [less ▲]

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See detailPlacement of Piezoelectric Laminate Actuator for Active Structural Acoustic Control
Brasseur, Maud; De Boe, Pascal; Golinval, Jean-Claude ULg et al

Conference (2004)

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See detailRecent state of the Aral sea from regular satellite observations. 35th COSPAR Scientific Assembly
Stanichny, Sergey ULg; Davidov, A.; Djenidi, Salim ULg et al

in 35th COSPAR Scientific Assembly (2004)

The Aral Sea disaster is one of the most significant examples of ecological catastrophe caused by mismanagement of water resources. Aral sea level dropped on 22 meters for the last 35 years. The sea ... [more ▼]

The Aral Sea disaster is one of the most significant examples of ecological catastrophe caused by mismanagement of water resources. Aral sea level dropped on 22 meters for the last 35 years. The sea separated in to two independent parts , the Large Sea(Southern) and the Small Sea (Northern), loosing more than 90% of its original water masses. After the collapse of the former Soviet Union, satellite retrieved data became the main source of information on this perishing system. Regular observations from AVHRR, SeaWiFS, MODIS and ASTER satellite sensors were used for our investigations. Sea surface temperature (SST) data of the AVHRR sensor and digital bottom map topography were used for sea level drop calculations. The Sea level defined as the digital map isobate corresponds quite well to the satellite derived coastline for the Eastern part of the Large Sea with a bottom slope of ˜ 0.00015. For the period 1989-2002 the sea level of the Large Sea dropped on 9.2 meters. However in 2003 the sea level remained stable. This stabilisation was due to an increase of water output of the rivers Amu--Darya and Syr-Darya in 2003. High resolution ASTER data showed that the main amount of Syr-Darya waters is discharged into the Large Sea. The dried bottom area now covers more than 45000 km2. On the base of AVHRR-SST data the temperature regime for different parts of the Aral Sea was calculated for the years 2002-2003. The annual amplitude of the SST variation reaches 37° C for the open waters. The observed minimum freezing point was -7° C due to very high salinity. Estimations from satellite retrieved freezing points show an increase of salinity up to 10% in the Eastern part of the Large Sea. It is almost paradox that on satellite images the ice appears warmer than the water. Strong variations of the water temperature (up to 5° C) within a few days could be observed from April to August and could be related to wind induced mixing. SeaWiFS ocean colour data were used for the investigation of the optical properties of the water in different parts of the Aral Sea for the years 2002-2003. A significant relation of optical properties with wind and temperature was obtained. Strong changes of the thermal regimes of the Sea can cause variations in local climatic conditions: The analysis of AVHRR NDVI - data for the surrounding areas demonstrated a shift in the annual vegetation cycle. In addition phenomena like: salt storms, wind driven tides, sources of groundwater, eddies and frontal structures as well as ice coverage of the Aral Sea were demonstrated on satellite images. [less ▲]

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See detailOn the O(1) Solution of Multiple-Scattering Problems
Geuzaine, Christophe ULg; Bruno, O.; Reitich, F.

in Proceedings of the 11th IEEE Conference on Electromagnetic Field Computation (CEFC'2004) (2004)

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See detailFamilial isolated pituitary adenomas : epidemiological, clinical and genetic studies
Ciccarelli, A.; Valdes Socin, Hernan Gonzalo ULg; Jaffrain-Rea, M. L. et al

in 12th International Congress of Endocrinology - Abstract book (2004)

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See detailL’architecture comme représentation de la justice pénale
Tieleman, David ULg

in GAMBARDELLA, Carmine; MARTUSCIELLO, Sabina (Eds.) Le Vie deai Mercanti : rappresentazione come governo della modificazione (2004)

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See detailCharacterisation of a novel topical nanoemulsion vehicle with spreading properties
Roland, Isabelle ULg; Gillard, Patricia ULg; Delattre, Luc ULg et al

in Proceedings of Eur conference on drug delivery and pharmaceutical technology (2004)

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See detailLow-frequency coherent fluctuations in BOLD activity: a preliminary report
Garraux, Gaëtan ULg; Guido, Nolte; Mark, Hallett

Poster (2004)

Background Low frequency (<0.1Hz) fluctuations originating from blood flow and oxygenation have been observed in the brain by different groups (Golanov et al. 1994; Biswal.et al. 1995). The goal of this ... [more ▼]

Background Low frequency (<0.1Hz) fluctuations originating from blood flow and oxygenation have been observed in the brain by different groups (Golanov et al. 1994; Biswal.et al. 1995). The goal of this study was to use BOLD fMRI to characterize coherent fluctuations in those low frequencies between spatially distant brain regions. Methods Thirteen right-handed subjects were studied using blocked-design BOLD fMRI at rest and as they performed sequential finger movements at a slow rate (~0.5 Hz) with their right hand. Serial acquisitions of EPI images were obtained at 3T using a single-shot 2D gradient-echo echo-planar imaging sequence. Data were processed and analyzed using standard procedures implemented in the statistical parametric mapping software (SPM2). Temporal profile of brain activity in 6 predefined regions (left S1M1, right S1M1, SMA, left thalamus, right cerebellum and CSF) were extracted on a subject-by-subject basis using the VOI tool in SPM2. After deconvolution (Gitelman et al. 2003), time series data representing movement and resting conditions were concatenated to create 2 within-condition time-series. After subtracting the mean over all epochs from each epoch, the (complex) coherency was calculated in the 5 lowest frequency bins with a frequency resolution of 1/17.5Hz (0, 0.05, 0.11, 0.17, 0.23 Hz). Real and imaginary parts of coherency, representing correlation and correlation of phase-shifted signals, respectively, were analyzed separately. Coherency was computed independently for each region pairs and each subject. Significance was defined as p<0.05 Bonferroni corrected for multiple comparisons. Results The main finding was the presence of coherent fluctuations in BOLD signal mainly in the lowest frequencies for (almost) all regions. The real part of coherency was equally pronounced during the movement and rest conditions. The only exception was a larger coherence during rest than during the task condition in the lowest frequencies between left and right S1M1. We could not find any significant imaginary part of coherency indicating that the time delays between dependent neural activations are negligible compared to the inverse frequencies under study. Partialling out the data in any of the regions did not have any significant impact on coherence map. Importantly, there was no evidence of coherent activity between any of the brain regions and CSF in any of the frequency bands. Discussion BOLD signal recorded during different behavioral steady-states showed very similar coherent fluctuations for all regions pairs studied mainly in the lowest frequencies. Those results are in good agreement with electrophysiological recordings in monkeys in which high coherence in band-limited power of local field potential signals have been reported at very low frequencies (<0.1Hz) (Leopold et al. 2003). In that study, coherence patterns were also highly similar under distinctly different behavioral states. Task-independent coherence in lower frequencies may be related to whole brain slow synchronous oscillations whose significance remains to be elucidated. References Golanov et al. (1994). Am J Physiol. 266; R204-214. Biswal et al. (1995). Magn Reson Med. 34; 537-541. Gitelman et al. (2003). NeuroImage. 19; 200-207. Leopold. et al. (2003). Cereb Cortex. 13; 422-433. [less ▲]

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See detailActivity-stability relationships in extremophilic enzymes
D'Amico, Salvino; Collins, Tony; Marx, Jean Claude et al

Poster (2004)

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See detailInteraction of lipopeptides from Bacillus subtilis with lipid vesicles
Deleu, Magali ULg; Paquot, Michel ULg; Olofsson, Gerd et al

Poster (2004)

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See detailObject tracking using a combined appearance and geometric model
Gabriel, Pierre F.; Piater, Justus ULg; Verly, Jacques ULg

Conference (2004)

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See detailUn sanctuaire thérapeutique du dieu lunaire Mên à Antioche de Pisidie
Nissen, Cécile ULg

in Musajo-Somma, Alfredo (Ed.) Actes du 39ème Congrès International d'Histoire de la Médecine : Bari-Metaponto, 5-10 September 2004, vol. I (2004)

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See detailDoppler echocardiographic repercussions of a 12 week treadmill training period in Standardbreds
Amory, Hélène ULg; De Moffarts, Brieuc; Art, Tatiana ULg et al

in 43rd Congress of the British Equine Veterinary Association (2004)

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See detailAdipocyte fatty acid-binding protein expression and mitochondrial activity as indicators of intramuscular fat content in young bulls
Barnola, I.; Hocquette, J. F.; Jurie, C. et al

in Book of Abstracts of the 55th Annual Meeting of the European Association for Animal Production (2004)

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See detailMotivation in the Gym: A Qualitative Approach
Cloes, Marc ULg

in Chin, M. K.; Hensley, L. D.; Cote, P. (Eds.) et al Global Perspectives in the Integration of Physical Activity, Sports, Dance, and Exercise Science in Physical Education: From Theory to Practice (2004)

Students’ motivation is a major concern of physical education teachers as well as it interest the others educators. Understanding of that complex variable increased during the last two decades. In the ... [more ▼]

Students’ motivation is a major concern of physical education teachers as well as it interest the others educators. Understanding of that complex variable increased during the last two decades. In the physical education domain, many studies were focused on isolated variables related to motivation and on their relationship with pupils’ behaviours. More recently, qualitative researches were conducted to enter in the class specificity and to integrate the complexity and diversity of the variables that influence students’ motivations. Combining questionnaires interviews and observation, some researchers have confirmed that student’s motivation depends on a package of dispositional as well as individual and collective situational factors. They pointed out also the determining role of the teacher in the development of a motivated class climate. This paper will describe a couple of qualitative studies designed to analyse students’ motivation and will underline their contribution in the understanding of the phenomena related to the development of motivation by students. Moreover, as teachers need research directly focused to their concerns, we must now provide them more support helping them to apply research data. The action research design is proposed as an appropriate approach in that way. The description of a pilot action research focused on the improvement of the students’ motivation in a secondary school level girls class will also proposed. The main results should provide the starting point of a reflective process about the strategies that teachers could plan on the gym. As it has been underlined above, the goal of the paper was to share useful information with practitioners and researchers and to encourage them to involve themselves in personal research on students’ motivation. [less ▲]

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See detailLa réduction chirurgicale de la masse tumorale des adénomes hypophysaires améliore le contrôle médical de l'acromégalie par les analogues de la Somatostatine
Petrossians, Patrick ULg; Borges-Martins, L.; Espinoza, C. et al

in XXIème Congrès de la Société Française d'Endocrinologie - Abstract book (2004)

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See detailA Set of Equity Indicators of the European Education Systems A synthesis
Demeuse, Marc; Baye, Ariane ULg; Straeten, Marie-Hélène et al

in Moreno Herrera, L.; Francia, G. (Eds.) Educational Policies. Implications for Equity, Equality and Equivalence (2004)

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See detailL'octréotide LP dans le traitement des ophtalmopathies basedowiennes incipiens : Evaluation prospective VS placebo
Wemeau, J. L.; Caron, P.; Rohmer, V. et al

in XXIème Congrès de la Société Française d'Endocrinologie - Abstract book (2004)

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See detailUne approche de la vraie prévalence des tumeurs hypophysaires
Beckers, Albert ULg; Ciccarelli, A.; Daly, Adrian ULg et al

in XXIème Congrès de la Société Française d'Endocrinologie - Abstract book (2004)

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See detailNonparametric censored regression using preliminary kernel smoothing
Heuchenne, Cédric ULg; Van Keilegom, Ingrid

in Proceedings of the 6th World Congress of the Bernoulli Society for Mathematical Statistics and Probability and the 67th Annual Meeting of the IMS (2004)

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See detailIdentification of specific biomarkers related to the effects of pollutants on the immune system of marine mammals
Brenez, Cécile; Gerkens, Pascal; Jauniaux, Thierry ULg et al

Poster (2004)

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See detailStudy of the cooling process of an extruded aluminium profile
Bouffioux, Chantal ULg; Carton, Marc ULg; Lecomte-Beckers, Jacqueline ULg et al

in Gosh, Somnath; Castro, Jose M.; Lee, June K. (Eds.) Proceedings of Materials Processing and Design: Modeling, Simulation and Applications (NUMIFORM 2004) (2004)

The prediction of the final axial stresses and the residual strains of complex extruded aluminium profiles requires a good knowledge of the material behavior and of the industrial process. This paper is ... [more ▼]

The prediction of the final axial stresses and the residual strains of complex extruded aluminium profiles requires a good knowledge of the material behavior and of the industrial process. This paper is focused on the methods required to provide the whole set of data: material ones and process ones. Scanning differential calorimetry, dilatometry and diffusivity tests identify thermophysic material properties and hot tensile tests identify parameters of the elastovisco- plastic Norton-Hoff law. The description of the industrial process and its simulations are described. Then a sensitivity analyzis provides the cooling key parameters causing the undesired final curvature during the industrial process. [less ▲]

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See detailGround-based FTIR measurements of O3- and climate-related gases in the free troposphere and lower stratosphere
De Mazière, M.; Barret, B.; Vigouroux, C. et al

in Zerefos, C. S. (Ed.) Proceedings Quadrennial Ozone Symposium (2004)

In the frame of the EC project UFTIR (Time series of Upper Free Troposphere observations from a European ground-based FTIR network), a common strategy for an optimal determination of the chemical ... [more ▼]

In the frame of the EC project UFTIR (Time series of Upper Free Troposphere observations from a European ground-based FTIR network), a common strategy for an optimal determination of the chemical composition in the free troposphere and lower stratosphere with ground-based Fourier-transform infrared (FTIR) spectrometers is being developed. The project focuses on 6 target species that are O3, CO, CH4, N2O, C2H6 and CHClF2 (HCFC-22). The strategy consists in selecting the most appropriate parameters to retrieve vertical concentration profiles from solar FTIR spectra. Among the important parameters are the spectral microwindows: they have been optimised to maximise the information content and to minimize the influence of poorly known spectroscopic data and interfering species. [less ▲]

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See detailImprovement of the current Version of the EC3 fot the lateral torsional buckling of unrestrained steel beams under fire condition
Vila Real, P. M. M.; Lopes, N.; Simoes da Silva, L. et al

in Franssen, Jean-Marc; Benichou; Kodur (Eds.) et al Proceedings of SiF'04: Third International Structures in Fire workshop (2004)

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See detailEnvironmental effects on the chemistry of the echinoderm skeleton
Ranner, Herwig; de Jonghe, Caroline; Ladrière, Ophélie ULg et al

Poster (2004)

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See detailPd-Ag/SiO2 and Pd-Cu/SiO2 cogelled xerogel catalysts for selective hydrodechlorination of 1,2-dichloroethane into ethylene
Lambert, Stéphanie ULg; Ferauche, Fabrice; Brasseur, Alain et al

Conference (2004)

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See detailGlutathione system deficiency in racehorses
De Moffarts, Brieuc; Kirschvink, N.; Art, Tatiana ULg et al

in Handbook of the 43rd Congress of the British Equine Veterinary Association (2004)

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See detailEffet de la fertilisation avec des engrais contenant du sélénium sur le statut sélénique de bovins Blanc-Bleu Belge : résultats préliminaires
Dufrasne, Isabelle ULg; Cabaraux, Jean-François ULg; Coenen, M. et al

in 11èmes Rencontres autour des Recherches sur les Ruminants (2004)

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See detailStudy of the impact of satellite data assimilation into a hydrodynamical model of the ligurian sea. Comparison between sst fields and sst satellite-based predicted fields
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Rixen, M. et al

Conference (2004)

The verification of a 3D hydrodynamic model of the Ligurian Sea is presented. Two assimilation experiments have been carried out with this model: the assimilation of real SST, and the assimilation of SST ... [more ▼]

The verification of a 3D hydrodynamic model of the Ligurian Sea is presented. Two assimilation experiments have been carried out with this model: the assimilation of real SST, and the assimilation of SST forecasted by a statistical predictor. The aim of the study is to establish the skill of the model in these two configurations. The assimilation of predicted SST can help to increase the model skill when observations are not available, and preliminary results show that both approaches obtained similar results. The verification is done in a multi-scale approach, by decomposing the model results and the observations into several spatial scales, using 2D discrete wavelet transforms. At each scale the error between the model and the observations is calculated, and the scales where the biggest errors occur can be identified. The variability distribution of the model and the observations is also examined at each scale, to study the impact of the assimilation on the model variability. This methodology provides a scale-dependent insight in the study of the assimilation of SST and predicted SST. The differences between both assimilated data and how these differences affect the model results are examined. [less ▲]

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See detailImpacts of plant invasions on ecosystem processes in Belgium
Vanderhoeven, Sonia ULg; Chapuis-Lardy, L.; Dassonville, N. et al

Poster (2004)

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See detailLlandovery biostratigraphy of the Paraná Basin, East Paraguay
Mendlowicz Mauller, P.; Pereira, E.; Grahn, Y. et al

Conference (2004)

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See detailÉvolution du Gravettien au Moyen Danube
Otte, Marcel ULg; Noiret, Pierre ULg

in Svoboda, Jirí; Sedlácková, Lenka (Eds.) The Gravettian along the Danube (2004)

Radiometric dates, typology and sedimentology suggest an autochthonous origin for the Gravettian culture in the Middle Danube. Its complex development is marked by tool specialisation, a demographic ... [more ▼]

Radiometric dates, typology and sedimentology suggest an autochthonous origin for the Gravettian culture in the Middle Danube. Its complex development is marked by tool specialisation, a demographic increase and an apparent sedentism. Subsequently, this key region spread to the east or the west by autonomous migratory movements during each phase (Bayacian, Kostenkian). The form of religiosity that is finally associated with this culture constitutes the first artistic creation evidencing a matriarchal system. Through the artistic forms, this belief system is also modified through time and across space: it is characterised as well by recognisable artistic “styles”. The broad Gravettian entity, in its distribution and the finesse of its adaptation, was a product of continental Europe, for which it constitutes the origin of later cultures and populations. At the same time, its plastic expressions seem to result in an Aurignacian acculturation, and its anatomy a blend of Neandertals with incoming modern humans. Curiously, recent phases are limited to the eastern Danube Basin. The Pleniglacial B seems to have interrupted western contacts, where the Magdalenians would soon appear, until Moravia. From then on, Europe as a whole would no longer be unified. In consequence, new approaches to the study of the Danubian Gravettian should be oriented towards the eastern plains, Moldavia and The Crimea. [less ▲]

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See detailSatellite data for local investigation in coastal zones: case study for Tangier area (Morrocco)
Tigny, Vincent; Elabdellaoui, Jamal; Stanichny et al

in 35th COSPAR Scientific Assembly (2004)

Recent operative satellite multispectral sensors like MERIS, MODIS with more traditional AVHRR and SeaWiFS and high resolution ASTER and ASAR give an unique opportunity for investigation of the marine ... [more ▼]

Recent operative satellite multispectral sensors like MERIS, MODIS with more traditional AVHRR and SeaWiFS and high resolution ASTER and ASAR give an unique opportunity for investigation of the marine processes with spatial scale from few hundred meters and temporal variability from few hours. In addition to this, QuikScat wind data helps to better understand an eventual forcing variation. One of the most important processes in coastal area is water (and probable pollutants) transport and mixing. Optical and thermal properties of the water or surface roughness peculiarities can be used as tracers or markers on subsequent images for the estimation of the currents structure and pollution displacement in ocean upper layer. Such kind of investigation is subject to significant interest near the ports and cities surroundings due to strong anthropogenic impact. Processes for the Tangier bay area were investigated by the means of the above-mentioned satellite data coupled with CTD and ADCP field measurements (August 2003). This analysis shown the strong influence of the mesoscale processes like eddies and wind driven upwelling on the currents patterns in the coastal zone. On the basis of the ASTER and ASAR data we estimated typical pollutions pathways. MODIS (Aqua and Terra ) and MERIS data were used for investigation of the variations of the water optical properties on time scale from few hours. This scale is important according to the typical 12 hours tidal motions in Tangier bay area Mutual analyses shown that mixing on Camarinal sill play a significant role in exchange processes in Tangier bay . AVHRR SST data set were analyzed together with QuikScat wind data. This analysis shown that Westward winds caused coastal upwelling phenomena with temperature difference up to 10° C. Quikscat spatial wind variability was also compared with NCEP wind data in nearest point --6W, 36N. Animations for different seasons, on the basis of subsequent thermal AVHRR images, highlighted the variability of regional dynamics. In addition, SeaWiFS time series images were processed, analyzed and compared with MODIS and MERIS data. Multispectral and multisensors approach for Tangier coastal areas study shown high efficiency at that scale, and can obviously be used for other regions. [less ▲]

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See detailPalynology of the Jauf Formation from the Northeastern part of the Arabian Shield
Al-Ruwaili, M.; Breuer, P.; Higgs, K. et al

Conference (2004)

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See detailMale hypogonadism caused by insolated LH deficiency : From pathology to gene, from gene to physiology
Valdes Socin, Hernan Gonzalo ULg; Salvi, R.; Pralong, F. et al

in 12th International Congress of Endocrinology - Abstract book (2004)

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See detailImpact de différents modes de présentation du sélénium dans la ration de bovins
Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg; Istasse, Louis ULg et al

in 11èmes Rencontres autour des Recherches sur les Ruminants (2004)

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See detailA hydrographic and biochemical climatology of the Mediterranean and the Black Sea: some statistical pitfalls
Rixen, Michel; Beckers, Jean-Marie ULg; Maillard, Catherine

in Vandenberghe, E.; Brown, M.; Costello, M.J (Eds.) et al IOC Workshop Report 188 (2004)

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See detailProtistan evolution in the Precambrian: a new multidisciplinary approach combining microscopy and microchemistry
Javaux, Emmanuelle ULg; Marchall, C. P.; Knoll, A. H. et al

Conference (2004)

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See detailMolecular monitoring of the introgression in Gossypium hirsutum L. of G. sturtanium Willis genes controlling the "glanded-plant and glandless-seed" trait
Benbouza, H.; Lacape, M.; Jacquemin, J. M. et al

in World Cotton Research Conference - 3. Cotton production for the new Millenium (2004)

One hundred mapped micro-satellites markers located on the chromosomes of subgenome Ah were used to monitor the introgression of DNA fragments coming from the Australian species G. sturtianum Willis in ... [more ▼]

One hundred mapped micro-satellites markers located on the chromosomes of subgenome Ah were used to monitor the introgression of DNA fragments coming from the Australian species G. sturtianum Willis in BC1, BC2, BC2S1, BC2S2, BC2S3, BC3, BC3S1 and BC3S2 obtained from the G. hirsutum L. x G. raimondii Ulb. x G. sturtianum (HRS) trispecific hybrid. In these plants, the inhibition of the gossypol synthesis only in the seed seems to be linked to the substitution of fragments of linkage groups C2, C3, C4, C5, C6, C7 and C9 of G. hirsutum by homeologous segments of G. sturtianum chromosomes. The prospect to use these genetic stocks to develop commercial varieties is discussed according to the putative genetic determinism of the “low-gossypol seed and high-gossypol plant”-trait. [less ▲]

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See detailCartography and Land Use change of world heritage areas and the benefits of remote sensing and GIS for conservation and monitoring world heritage sites
De Maeyer, Philippe; Bogaert, Peter; De Man, Joris et al

in Goossens, Rudi (Ed.) Remote Sensing in Transition (2004)

Remote sensing has been widely used within various fields, with environmental applications being the most widespread. Through the joint effort of UNESCO, OSTC Belgium, Geography Dept, Ghent University and ... [more ▼]

Remote sensing has been widely used within various fields, with environmental applications being the most widespread. Through the joint effort of UNESCO, OSTC Belgium, Geography Dept, Ghent University and Labo SURFACES of Geomatic Dept, Liege University, a demo project to conserve five world Heritage sites was launched. The remote sensing and Geographic Information Systems (GIS) project attempted to provide basic cartography of the world heritage sites and also detect land use changes in and around the sites in the past ten years. A final contribution towards the conservation and monitoring of the world Heritage sites was made through this project. To fulfil the objectives of this project an internet site was created to provide information to a wider public audience. This raises awareness of not only the location and status of the selected Heritage sites, but also contributes to an improved information base leading to the sustainable management of these sites. [less ▲]

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See detailAnimal performance and nitrogen surplus in suckler cows pastures fertilised with mineral nitrogen fertilizer, pig slurry or cattle compost
Dufrasne, Isabelle ULg; Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg et al

in Land use systems in grassland dominated regions, Book of abstracts of 20th General Meeting of the European Grassland Federation (2004)

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See detail« Questions choisies de droit des biens : servitudes et mitoyenneté »,
Lecocq, Pascale ULg; Boufflette, Sophie ULg; Vandeweerd, Nathalie

in Chronique de droit à l'usage des juges de paix et de police 2004 (2004)

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See detailCompromiso motor y participation en actividades fisicas y desportivas extraescolar: comparacion del alumnado en relacion con su habilidad
Piéron, Maurice; Cloes, Marc ULg

in Gonzalez Valeiro, M. A.; Sanchez Molina, J. A.; Gomez Varela, J. (Eds.) Preparacion professional y necesidades socials (Educacion fisica, deporte, ocio, tercera edad, salud...). Proceedings of the AIESEP International Congress La Coruña 2002 (2004)

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See detailLe projet de plate-forme électronique de construction et de gestion qualité de tests standardisés e-C&QCST
Gilles, Jean-Luc ULg; Piette, Sylvie-Anne ULg; Detroz, Pascal ULg et al

in Arzola, S. (Ed.) World education for educational research (WAER) : XIV congreso mundial de ciencias de la educacion : educatores para una nueva cultura : summary of papers abstracts (2004)

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See detailProposition d’une méthode de typologie hydro-géomorphologique des cours d’eau et tes sur un sous-bassin du Rhône (Bassin de l’Yzeron).
Schmitt, Laurent; Valette, L.; Valin, K. et al

in MOSELLA, XXIX (3-4) (2004)

Proposal of a method of hydro-geomorphological typology of rivers and test of a sub-basin of the Rhône River (Yzeron basin). The paper proposes a hydro-geomorphological typology method of watercourses ... [more ▼]

Proposal of a method of hydro-geomorphological typology of rivers and test of a sub-basin of the Rhône River (Yzeron basin). The paper proposes a hydro-geomorphological typology method of watercourses that might potentially be used in western Europe. The method was tested in the Yzeron basin (France). Field data were collected and analysed by multivariate statistics. Statistical results were consistent with the results of the typology model. Some recommendations are also made for the future development of automatic methods of characterization-sectorization of rivers. [less ▲]

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See detailCase report : A suspicion of cortico-cerebral necrosis in a Belgian Blue herd after ingestion of moulded silage
Guyot, Hugues ULg; Sandersen, Charlotte ULg; Aliaoui, Hamani et al

Poster (2004)

After ingestion of moulded beet pulp silage, cases of cortico-cerebral necrosis (CCN) and mortalities have been observed in a Belgian Blue (BB) herd. Contamination with Paecilomyces spp., a mould that ... [more ▼]

After ingestion of moulded beet pulp silage, cases of cortico-cerebral necrosis (CCN) and mortalities have been observed in a Belgian Blue (BB) herd. Contamination with Paecilomyces spp., a mould that produces byssochlamic acid, malformins and patulin, has been proven. Among these toxins, patulin is known to have cancerogenic, immunosuppressive and tremorgenic effects, but also acts on the respiratory and digestive systems. Twenty-five days after progressive introduction of beet pulp silage into the ration of a dual purpose BB herd, most of the animals showed diminished appetite, salivation and decreased milk production. All 35 cows were reluctant to consume the beet pulp silage, but continued to eat grass silage voluntarily. Seven of them showed anorexia and nervous symptoms, like head pressing and blindness. Four animals died within 1 week after onset of neurological symptoms. No necropsy has been performed, since legislation does not allow post-mortem examination of the central nervous system in the field. The three survivors had been treated successfully with thiamine (10 mg/kg, IV, TID) and recovered completely within five days. After the beet pulp silage had been identified as causative agent, it had been removed from the animals’ ration and no more clinical case has been observed. Four weeks later, the same beet pulp silage has been reintroduced into the animals’ ration and provoked again diminished appetite, salivation and a decrease in milk production in most of the animals. Clinical signs were also suggesting lead poisoning but any contact with lead containing material could have been excluded. Silage was obviously moulded and analysis revealed the presence of 1.6 million CFU Paecilomyces spp./g of silage. Although no further investigation has been made to identify the mycotoxins, an intoxication with patulin has been suspected, since other mycotoxins produced by these species are less toxic. Although it has not been described that CCN can be induced by ingestion of Paecilomyces spp., it seems that there is a close relation between ingestion of Paecilomyces-contaminated silage and observed clinical signs in this herd. [less ▲]

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See detailC18:3n-3 content in beef meat as influenced by breed, diet and muscle location
Cuvelier, Christine ULg; Dotreppe, Olivier ULg; Cabaraux, Jean-François ULg et al

in Book of absracts of the 55th Annual Meeting of the European Association for Animal Production (2004)

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See detailSevere fungal pneumonia in harbour porpoises stranded on belgian and french coastline in 2003
Jauniaux, Thierry ULg; Mignon, Bernard ULg; Coignoul, Freddy ULg

in Annual proceedings of the 18th annual conference of the European Cetacean Society (2004)

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See detailReconstruction of missing data in geophysical fields. resolution of moving patterns
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Rixen, M. et al

Conference (2004)

A method for the reconstruction of missing data in large data sets is presented. The method, DINEOF (Data INterpolating Empirical Orthogonal Functions), calculates the missing data from an optimal number ... [more ▼]

A method for the reconstruction of missing data in large data sets is presented. The method, DINEOF (Data INterpolating Empirical Orthogonal Functions), calculates the missing data from an optimal number of EOFs determined by cross-validation. A Lanczos method has been used for the EOF decomposition, in order to work with large matrices. DINEOF has been applied to two data sets of sea surface temperature: a set of 105 images in the Adriatic Sea and a set of 216 images in Tanganyika Lake. These data sets present 52% and 37% of missing data respectively, due to cloud coverage. Several validation studies have been carried out: comparison with in situ data and reconstruction of increasing amounts of missing data, from 40% to 80% of the total data, by artificially adding clouds. All tests show that results are robust. DINEOF uses a classical EOF decomposition. In this work we also present a different EOF decomposition, known as Extended EOF (ExEOF) or Singular Spectrum Analysis (SSA). This technique consists in using a lagged version of the matrix being analysed. By taking into account both the spatial and temporal correlation of the data, the ExEOF technique resolves spatio-temporal moving patterns in a more accurate way. Preliminary results show that this technique helps to better reconstruct the missing data in our data sets. [less ▲]

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See detailNanoscaleorganization of mixed fengycin/lipid monolayers
Eeman, Marc; Deleu, Magali ULg; Paquot, Michel ULg et al

Poster (2004)

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See detailBronchial reactivity assessed by whole body barometric plethysmography is correlated with lower airway inflammation in cats
Kirschvink, Nathalie; Leemans, Jerome; Delvaux et al

Conference (2004)

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See detailLocalizable effective theories, bootstrap and the parameters of hadron resonances
Semenov-Tyan-Shanskiy, Kirill ULg; Vereshagin, Alexander; Vereshagin, Vladimir

in AIP Conference Proceedings (2004), 717

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See detailConcomitant coronary and carotid artery surgery: operative outcome and long-term results
Kolh, Philippe ULg; Tchana-Sato, Vincent ULg; Honoré, Charles ULg et al

in European Heart Journal (2004), 25(Suppl. S), 360-361

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See detailCushing's disease : very long-term results of transsphenoidal, clinical and genetic studies
Stevenaert, Achille ULg; Perrin, G.; Martin, Didier ULg et al

in 12th International Congress of Endocrinology - Abstract book (2004)

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See detailEvaluation et correction du stress oxydant
de Moffarts, Brieuc; Kirschvink, Nathalie; Lekeux, Pierre ULg

in XXIème Journée d’Etude de la Belgian Equine Practitioners Society (BEPS) (2004)

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See detailHydro-mechanical numerical modelling of geotechnical problems using local second gradient models
Chambon, René; Collin, Frédéric ULg

in Vermeer, Peter; Ehlers, W.; Herrmann, H. J. (Eds.) Modelling of cohesive-Frictional Materials (2004)

The paper presents some applications of a local second gradient theory used to describe the mechanical behavior of a continua. This theory has been developed in order to avoid some well known drawbacks of ... [more ▼]

The paper presents some applications of a local second gradient theory used to describe the mechanical behavior of a continua. This theory has been developed in order to avoid some well known drawbacks of classical theories, when softening and/or localization occur in a computation. This theory is extended and then applied in a hydromechanical coupled problem, in the case of fully saturated geomaterials. The corresponding finite element method taking into account the geometrical non linearities is detailed. Preliminary results using the finite element code developed in this context are then discussed and allow to study post localization behavior. [less ▲]

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See detailSynthèse de la (+/-)-hyperaspine, alcaloïde défensif de la coccinelle Hyperaspis campestris
Dooms, Cédric; Laurent, Pascal ULg; Daloze, Désiré et al

Poster (2004)

Dans la nature, les coccinelles ont peu de prédateurs. En effet, la plupart de ces insectes sont défendus chimiquement. Plusieurs espèces de coccinelles ont été étudiées jusqu’à présent et il a été ... [more ▼]

Dans la nature, les coccinelles ont peu de prédateurs. En effet, la plupart de ces insectes sont défendus chimiquement. Plusieurs espèces de coccinelles ont été étudiées jusqu’à présent et il a été démontré que la protection dont jouissent les coccinelles est due à la présence d’alcaloïdes répulsifs et parfois toxiques dans leur hémolymphe. Récemment, l’étude de la coccinelle Hyperaspis campestris a permis de mettre en évidence l’hyperaspine, un nouvel alcaloïde de type 3-oxaquinolizidinique. Afin de déterminer la configuration absolue de cet alcaloïde et afin d’en évaluer les activités biologiques et pharmacologiques, nous nous sommes proposés de synthétiser cette molécule. Notre schéma de synthèse se base sur une double séquence oxydation anodique – substitution nucléophile au départ de 4-pipéridone protégée. L’énone obtenue est ensuite engagée dans une addition de Michaël diastéréosélective pour former la piperidin-4-one-2,6-disubstituée précurseur de l’hyperaspine. [less ▲]

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See detailAssimilation of Sea Surface Temperature predicted by a satellite-based forecasting system in a doubly nested primitive equation model of the Ligurian Sea
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Alvarez, A. et al

Conference (2004)

Data assimilation is traditionally used to combine model dynamics and observations in a statistical optimal way. Assimilation of observations improves therefore hindcasts and nowcasts of the ocean state ... [more ▼]

Data assimilation is traditionally used to combine model dynamics and observations in a statistical optimal way. Assimilation of observations improves therefore hindcasts and nowcasts of the ocean state than otherwise obtained by the model alone. The observational constraints are necessary to reduce uncertainties and imperfections of the ocean model. Due to the obvious lack of future observations, the model forecast cannot be controlled by observations and the predictive skill degrades as the forecast time lag increases. The error grow is not only caused by the chaotic nature of the system but also by the biases and drifts of the model. The later part can be reduced by considering different models with different imperfections. Data assimilation provides the statistical frame for merging the different model results. A primitive equation model of the Mediterranean Sea (1/4° resolution) has been implemented with two successive grid refinements of the Liguro-Provençal Basin (1/20°) and the Ligurian Sea (1/60°) respectively (Barth et al, 2003). The dependence of the ``parent'' model and the embedded ``child'' model is bi-directional; it involves the exchange of boundary conditions and feedback between the models. Alvarez el al. (2004) developed a statistical predictor for forecasting the SST of the Ligurian Sea with a time lag of 7 days based on the previous remote sensed SST. The degrees of freedom of the SST are reduced by an Empirical Orthogonal Function (EOF) analysis. A genetic algorithm trained by the historical SST evolution in the Ligurian Sea is used to predict the EOF amplitudes. Observed and forecasted SST are assimilated in the hydrodynamic model and the results of this two experiments are compared to the model run without assimilation. The assimilation of the forecasted SST reduces the error of the model by an amount comparable to the assimilation of real SST, showing the potential of skill improvement of combining statistical and hydrodynamic models. [less ▲]

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See detailUne définition opérationnelle de la Métacognition et ses mises en oeuvre
Leclercq, Dieudonné ULg; Poumay, Marianne ULg

in 21e colloque de l'Association Internationale de Pédagogie Universitaire (A.I.P.U.) Université Cadi Ayyad de Marrakech (Maroc). "L'AIPU : 20 ans de recherches et d'actions pédagogiques; bilan et perspectives." (2004)

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See detailEffect of ADAMTS-2, a metalloproteinase containing a disintegrin domain and thrombospondin type I repeats, during angiogenesis in vitro and in vivo
Dubail, Johanne ULg; Kesteloot, Frédéric ULg; Motte, Patrick ULg et al

in Angiogenesis (2004), 7(2), 172

Formation of new blood vessels (angiogenesis) is a key step during the development of various pathologies, including cancer. Enzymes of the ADAMTS family are closely related to MMPs and ADAMs. They ... [more ▼]

Formation of new blood vessels (angiogenesis) is a key step during the development of various pathologies, including cancer. Enzymes of the ADAMTS family are closely related to MMPs and ADAMs. They further contain specific domains, such as the ‘‘Thrombospondin type I’’ (TSP1) repeats, that are able to strongly repress angiogenesis, as described for thrombospondin-1 and -2, and for ADAMTS-1 and -8. The primary function of ADAMTS-2 is to process collagen type I, II and III precursors into mature molecules by excising the aminopropeptide. We further hypothesized that it could modulate angiogenesis through its TSP1 repeats. This hypothesis was investigated using different in vitro experimental models of angiogenesis. Recombinant ADAMTS-2 induced morphological changes in human umbilical vein endothelial cells (HUVEC) and human microvessel endothelial cells (HMEC), and significantly reduced their proliferation, attachment and spreading. Similar effects were observed when using inactive ADAMTS-2 mutated at the Zn2+-binding catalytic site. ADAMTS-2 did not alter the initial steps of formation of capillary-like structures by HUVEC in vitro. However, these structures appeared much less stable and were more rapidly disrupted in presence of ADAMTS-2 than in control conditions. ADAMTS-2 was also tested in an ex vivo angiogenesis model using aortic rings from rats and mice, wild type or KO for ADAMTS-2. Outgrowth of capillaries was slightly increased from aortas of ADAMTS-2 KO mice (TS2-/-) as compared to aortas from control animals (TS2+/+), while addition of full size recombinant ADAMTS-2 reduced the formation of capillary structures from rat aortas, suggesting its anti-angiogenic activity. Choroidal neovascularization induced in TS2+/+ or TS2-/- mice by LASER burns was used as in vivo model to confirm the in vitro and ex vivo results. Several genes involved in the healing and angiogenesis processes (fibrillar collagens, VEGF, TGF-beta and CTGF) were not differently regulated in TS2+/+ and TS2-/- mice at 5 days. [less ▲]

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See detailTwo-dimensional model for the cold atom micromaser
Martin, John ULg; Solano, E.; Zagury, N. et al

Poster (2004)

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See detailChemo-mechanical interactions in clay: a correlation between clay mineralogy and Atterberg limits
Schmitz, R. M.; Schroeder, Christian ULg; Charlier, Robert ULg

in Applied Clay Science (2004), 26(1-4), 351-358

Among some few others tests, the evaluation of the Atterberg limits is a very basic soil mechanical test allowing a first insight into the chemical reactivity of clays. Basically, the liquid limit and the ... [more ▼]

Among some few others tests, the evaluation of the Atterberg limits is a very basic soil mechanical test allowing a first insight into the chemical reactivity of clays. Basically, the liquid limit and the plasticity index are highly and mainly influenced by the ability of clay minerals to interact with liquids. In this contribution, a correlation between the Atterberg limits and clay mineralogy is proposed. This correlation increases the understanding between clay mineralogists and engineers in soil mechanics; additionally a wealth of information in clay mineralogy literature is now available to predict the mechanical behaviour of clays via index tests. (C) 2003 Elsevier B.V. All rights reserved. [less ▲]

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See detailEffects of temperature on the chemistry of the echinoderm skeleton
Ranner, Herwig; Ladrière, Ophélie ULg; Navez, Jacques et al

Poster (2004)

Detailed reference viewed: 17 (1 ULg)
See detailSynthèse de la (+/-)-hyperaspine, alcaloïde défensif de la coccinelle Hyperaspis campestris
Dooms, Cédric; Laurent, Pascal ULg; Daloze, Désiré et al

Poster (2004)

Dans la nature, les coccinelles ont peu de prédateurs. En effet, la plupart de ces insectes sont défendus chimiquement. Plusieurs espèces de coccinelles ont été étudiées jusqu'a présent et il a été ... [more ▼]

Dans la nature, les coccinelles ont peu de prédateurs. En effet, la plupart de ces insectes sont défendus chimiquement. Plusieurs espèces de coccinelles ont été étudiées jusqu'a présent et il a été démontré que la protection dont jouissent les coccinelles est due a la présence d'alcaloïdes répulsifs et parfois toxiques dans leur hemolymphe. Récemment, l’étude de la coccinelle Hyperaspis campestris a permis de mettre en évidence l’hyperaspine, un nouvel alcaloïde de type 3-oxaquinolizidinique. Afin de déterminer la configuration absolue de cet alcaloïde et afin d'en évaluer les activités biologiques et pharmacologiques, nous nous sommes proposés de synthétiser cette molécule. Notre schéma de synthèse se base sur une double séquence oxydation anodique - substitution nucléophile au départ de 4-pipéridinone protégée. L'énone obtenue est ensuite engagée dans une addition de Michael diastéréosélective pour former la piperidin-4-one-2,6-trans disubstituée, précurseur de l’hyperaspine. [less ▲]

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See detailActivity-stability relationships in extremophilic enzymes
D'Amico, Salvino; Collins, Tony; Georlette, Daphné et al

Conference (2004)

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See detailEffect of elevated PCO2 on optical properties of the coccolithophorid Emiliania huxleyi grown under nitrate limitation
Denis, M.; Sciandra; Harlay, Jérôme ULg et al

in Cytometry. Part A : The Journal of the International Society for Analytical Cytology (2004), 59A(1), 105

Side scatter and red fluorescence properties of the coccolithophore Emiliania huxleyi were investigated by flow cytometry when NO3-limited continuous cultures were submitted to a CO2 partial pressure ... [more ▼]

Side scatter and red fluorescence properties of the coccolithophore Emiliania huxleyi were investigated by flow cytometry when NO3-limited continuous cultures were submitted to a CO2 partial pressure (pCO2) increase from 400 to 700 ppm. Cultures renewed at the rate of 0.5 d-1 and were submitted to saturating light level. pCO2 was controlled by bubbling CO2-rich or CO2- free air in the cultures. Most of the analyses were repeated 5 times and the average SD were < 1.6%, 0.1 and 0.2% for counting, fluorescence and side scatter respectively. Considering the possible decalcification induced by the increase of CO2 in the chemostat atmosphere, the maximum variation that can be expected for side scatter is that provided by the coccolith depletion upon acidification of the cell suspension. The acidification induced a large (36%) decrease of the side scatter signal but had no detectable effect on the red fluorescence. A control was run with a non-calcifying species, Dunaliella tertiolecta, where acidification induced no detectable change, both on fluorescence and side scatter. During the time of the experiment, the decline of side scatter in chemostat 1 never approached the potential 36% change observed when coccoliths are fully dissolved. Interestingly, the specific chl a fluorescence of E. huxleyi slightly increased during the period of high CO2 level. At the end of the experiment this increase amounted to a significant 2.8% of the initial signal. Furthermore, it progressed linearly with time over the period of observation. However, the experiment did not last enough to know if the fluorescence increase had already reached its maximum value. The acidification experiment supported the use of side scatter as a relevant parameter to trace potential changes in calcification. Since the estimated 25% decrease in calcification induced by the rise in CO2 atmosphere did not result in dramatic changes in side scatter values, we can conclude that the number of cocoliths and the overall shape and granulosity of cells was not significantly affected by this decrease. Changes must have only affected tiny structure details of the coccoliths which is supported by scanning electron microscopy observations. The small but significant increase of the fluorescence signal can be considered as a physiological response to the CO2 rise. This suggests a more dynamic photosynthetic process that would result in a higher rate of organic matter production providing that the system is not nutrient limited as in the present situation. [less ▲]

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