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See detailHot stars survey with the GAIA space mission
Lobel, A.; Liu, C.; Frémat, Y. et al

Poster (2009)

Detailed reference viewed: 29 (11 ULg)
See detailBiomimetic approaches to understand how mycosubtilin, an antifungal lipopeptide, can interact with cytoplasmic membranes
Nasir, Mehmet Nail ULg; Kouzayha, Achraf; Besson, Françoise

Poster (2009)

Mycosubtilin is a natural cyclic lipopeptide characterized by its strong antifungal activities. It has been demonstrated that the cytoplasmic membranes of the sensitive cells are the target of this ... [more ▼]

Mycosubtilin is a natural cyclic lipopeptide characterized by its strong antifungal activities. It has been demonstrated that the cytoplasmic membranes of the sensitive cells are the target of this antifungal lipopeptide. In spite of the fact that some properties of mycosubtilin have been highlighted, the molecular mechanism of its biological action remains partially understood. In view of this, we investigated the interactions between mycosubtilin and cytoplasmic membranes by using biomimetic systems such as lipid monolayers at the air-water interface and lipid multilayers. These interactions were examined by different methods (pressure/area isotherms, kinetic measurements of the interfacial adsorption, Brewster angle microscopy, infrared and NMR spectroscopies). We showed that mycosubtilin does not interact strongly with the C=O ester residues of phospholipids in multilayers, while it modifies the transition temperature of the alkyl chains. It was also demonstrated that these interactions depend on the phospholipid phase. Varying the lipid composition of monolayers allowed us to demonstrate an original behavior of mycosubtilin in the presence of sterol. This suggests a mycosubtilin-sterol affinity. [less ▲]

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See detailLight transmission imaging as a useful tool to decrypt root water uptake
Lobet, Guillaume ULg; Javaux, M.; Pagès, L. et al

Poster (2009)

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See detailAn analysis of the random error affecting CO2 fluxes measured by eddy covariance.
Laffineur, Quentin ULg; Heinesch, Bernard ULg; Aubinet, Marc ULg

Poster (2009)

This study focuses on random errors associated with eddy covariance flux measurements. This error is heteroscedastic, increases linearly with the flux magnitude and the error on CO2 flux decreases with ... [more ▼]

This study focuses on random errors associated with eddy covariance flux measurements. This error is heteroscedastic, increases linearly with the flux magnitude and the error on CO2 flux decreases with increasing wind speed. As random errors accumulate in quadrature, they are less critical than systematic errors as far as flux sums are concerned. On the other hand it may affect significantly half-hour data and pose problem for modelling or analysis of flux response to environmental parameters. It is therefore useful to characterize the site and the specific conditions under which the random error is the most important. The random error on CO2 flux was computed at two sites, one cropland and one forested site, by using the daily differencing approach (DDA, Hollinger and Richardson 2005). Relationships with flux and wind speed were compared between different periods (day vs. night, growing season vs. rest of the year) and for different flux computation methods. First, an increase of random error with decreasing wind speed was observed at low speed. This effect was not observed during the rest period at the cropland site and disappears when a high-pass filtering is applied to the data. It may be explained by two processes: on one hand, the below canopy air layer is less efficiently mixed which can create large flux variations when CO2 sources and sinks are separated. On the other hand, mesoscale motions may exceed small-scale turbulence at low wind speed. At similar wind speeds, the random error was lower at the cropland than at the forested site, which can be due to either process: indeed, at the cropland site, the distance between CO2 sources and sinks is smaller which reduce the low mixing effect but the site is also more flat and homogeneous which reduce the impact of mesoscale movements. The possibility of mesoscale movement impact is supported by the fact that the effect disappears when applying a high pass filtering. The random error was also found sensitive to the computational method: in particular it is larger when the flux is computed using the block average rather than the running mean, it increases when storage is taken into account and decreases when data are filtered by applying stationarity screening or u* filtering. [less ▲]

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See detailAn analysis of the random error affecting CO2 fluxes measured by eddy covariance
Laffineur, Quentin ULg; Heinesch, Bernard ULg; Aubinet, Marc ULg

Poster (2009)

This study focuses on random errors associated with eddy covariance flux measurements. This error is heteroscedastic, increases linearly with the flux magnitude and the error on CO2 flux decreases with ... [more ▼]

This study focuses on random errors associated with eddy covariance flux measurements. This error is heteroscedastic, increases linearly with the flux magnitude and the error on CO2 flux decreases with increasing wind speed. As random errors accumulate in quadrature, they are less critical than systematic errors as far as flux sums are concerned. On the other hand it may affect significantly half-hour data and pose problem for modelling or analysis of flux response to environmental parameters. It is therefore useful to characterize the site and the specific conditions under which the random error is the most important. The random error on CO2 flux was computed at two sites, one cropland and one forested site, by using the daily differencing approach (DDA, Hollinger and Richardson 2005). Relationships with flux and wind speed were compared between different periods (day vs. night, growing season vs. rest of the year) and for different flux computation methods. First, an increase of random error with decreasing wind speed was observed at low speed. This effect was not observed during the rest period at the cropland site and disappears when a high-pass filtering is applied to the data. It may be explained by two processes: on one hand, the below canopy air layer is less efficiently mixed which can create large flux variations when CO2 sources and sinks are separated. On the other hand, mesoscale motions may exceed small-scale turbulence at low wind speed. At similar wind speeds, the random error was lower at the cropland than at the forested site, which can be due to either process: indeed, at the cropland site, the distance between CO2 sources and sinks is smaller which reduce the low mixing effect but the site is also more flat and homogeneous which reduce the impact of mesoscale movements. The possibility of mesoscale movement impact is supported by the fact that the effect disappears when applying a high pass filtering. The random error was also found sensitive to the computational method: in particular it is larger when the flux is computed using the block average rather than the running mean, it increases when storage is taken into account and decreases when data are filtered by applying stationarity screening or u* filtering. [less ▲]

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See detailFamiliar person recognition: do we remember more episodic memories from faces than from names?
Barsics, Catherine ULg; Brédart, Serge ULg

Poster (2009)

This study was aimed at investigating whether the recognition of familiar faces is more likely to be associated with an experience of Remembering than the recognition of familiar names. Using the Remember ... [more ▼]

This study was aimed at investigating whether the recognition of familiar faces is more likely to be associated with an experience of Remembering than the recognition of familiar names. Using the Remember/Know paradigm the proportions of episodic memories recalled following the recognition of famous faces and names (Conditions) were assessed. Presented faces and names were previously judged by an independent group of participants as eliciting an equivalent level of familiarity. Nevertheless significant differences between the two conditions appeared in hit and false alarm rates. However, present results showed no significant difference in the recollection of personal memories (Remember responses conditionalized on the hits), following familiar faces compared with familiar names recognition. This finding contrasts with recent accounts assuming that faces are more prone to yield episodic memories than other cues to person identity. These results and their implications for current Interactive Activation and Competition person recognition models are discussed. [less ▲]

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See detailYlang-ylang (Cananga odorata (Lam.) Hook. & Thoms. var. genuina) essential oils from Comoros Islands: characterization and variability
Benini, Céline ULg; Wathelet, Jean-Paul ULg; du Jardin, Patrick ULg et al

Poster (2009)

The Union of the Comoros is the world’s biggest producer of ylang-ylang essential oils. Comorian ylang-ylang also provides the most valuable essential oil that can be found on international market. This ... [more ▼]

The Union of the Comoros is the world’s biggest producer of ylang-ylang essential oils. Comorian ylang-ylang also provides the most valuable essential oil that can be found on international market. This product represents a high percentage of Comoros’ annual currency. Ylang-ylang essential oil is obtained by fractionned hydrodistillation or steam distillation of Cananga odorata fresh flowers. This oil is commercialized in five different quality grades (extra S; extra; I; II; III) which possess their own physicochemical properties. [less ▲]

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See detailCentre de Ressources Autisme Liège
Philippe, Paule ULg; Jacques, Jessica ULg

Poster (2009)

Detailed reference viewed: 139 (10 ULg)
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See detailVOC and ozone fluxes from a pine forest in the north of Belgium
Eerdekens, Guenther; Gielen, Bart; Neirynck, J. et al

Poster (2009)

Plants release large amounts of carbon as Volatile Organic Compounds (VOCs) into the atmosphere. These VOCs play an important role in the chemistry of the troposphere as they can be involved in the ... [more ▼]

Plants release large amounts of carbon as Volatile Organic Compounds (VOCs) into the atmosphere. These VOCs play an important role in the chemistry of the troposphere as they can be involved in the mechanisms of ozone and aerosol formation. The key mechanisms underneath biogenic VOC emissions are still not well understood, leading to large uncertainties in BVOC inventories on global and regional scales. Measurements of VOCs, ozone and micro-meteorology are conducted at the ‘De inslag’, a 80-year old mixed pine–oak forest located in the Campine region near Antwerp, Belgium. The forest site is a level-II plot of the European Programme of Intensive Monitoring Forest Ecosystems and is part of the Carboeuro and Nitroeurope-flux research network. The site is equipped with a flux tower that reaches above the 23m canopy. A Proton Transfer Reaction Mass Spectrometer and a Fast Ozone analyser allow determining VOC and ozone fluxes by Eddy Covariance. An analytic footprint model is used to exclude non-forest fluxes. In this study, we will test the accuracy of this footprint model with anthropogenic tracers (benzene and toluene). [less ▲]

Detailed reference viewed: 33 (2 ULg)
See detailInnate lymphocytes in human papillomavirus (HPV)-associated cervical cancers
Renoux, V; Bisig, B; Thiry, Marc ULg et al

Poster (2009)

Detailed reference viewed: 8 (0 ULg)
See detailWave-particle duality in a two atom interferometer
Schilling, U.; Thiel, C.; Bastin, Thierry ULg et al

Poster (2009)

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See detailSpecies delimitation and phylogeography of an African tropical tree species complex
Duminil, J.; Heuertz, M.; Bourland, Nils ULg et al

Poster (2009)

Detailed reference viewed: 65 (9 ULg)
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See detailAn in situ NMR analysis of the formation of P- and SiO2-doped TiO2 xerogels
Bodson, Céline ULg; Lambert, Stéphanie ULg; Cattoën, Xavier et al

Poster (2009)

Detailed reference viewed: 14 (4 ULg)
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See detailStudy of the usefulness of the data of Bacillus cereus outbreaks in Belgium (2005-2008) for a dose-response modelling purpose
Durenne, Bastien ULg; Denayer, Sarah; Botteldoorn, Nadine et al

Poster (2009)

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See detailTurtle cell cultures for nucleolar studies
Lamaye, Françoise; Thiry, Marc ULg

Poster (2009)

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See detailVascularisation of the equine menisci
De Busscher, V.; Maitre, D.; Busoni, Valeria ULg et al

Poster (2009)

Detailed reference viewed: 72 (15 ULg)
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See detailInnate lymphocytes in human papillomavirus (HPV)-associated cervical cancers
Renoux, V; Bisig, B; Thiry, Marc ULg et al

Poster (2009)

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See detailAgonistic sounds in the clownfish Amphiprion clarkii: implication of the swimbladder in the sound-producing mechanism
Colleye, Orphal ULg; Nakamura, Masaru; Parmentier, Eric ULg

Poster (2009)

Clownfishes are aggressive fishes that use sound production to defend their anemone territory. It has been shown that they produce agonistic sounds using a jaw teeth snapping. At present, this mechanism ... [more ▼]

Clownfishes are aggressive fishes that use sound production to defend their anemone territory. It has been shown that they produce agonistic sounds using a jaw teeth snapping. At present, this mechanism has highlighted the onset of the sound but has not explained yet which structure is responsible for the sound modulation. Interestingly, some acoustic features such as dominant frequency and pulse duration are directly related to fish size. Such variations are linked to a morphological constraint. Also, the existent relationship between fish size and swimbladder size implies that the swimbladder might be involved in the sound production. Sound analyses in Amphiprion clarkii showed that the experimental filling of the swimbladder with physiological liquid (NaCl 9‰) significantly modified the acoustic features. The most striking changes were a significant increase in dominant frequency and a significant decrease in pulse duration. These observations highlighted the implication of the swimbladder in sound modulation. In clownfishes, dominant frequency and pulse duration are morphologically determined signals. The swimbladder appears to modulate these acoustic features by acting as a resonant chamber. [less ▲]

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See detailRegulation of microRNAs expression by the antiangiogenic factor 16K hPRL
Halkein, Julie ULg; Malvaux, Ludovic; Nguyen, Ngoc-Quynh-Nhu ULg et al

Poster (2009)

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See detailInteraction of nanoparticles for drug delivery with biomimetic model membranes
Frost, Rickard; Cerda, Bernadino; Grandfils, Christian ULg et al

Poster (2009)

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See detailProduction of four amyloidogenic variants of human lysozyme as inclusion bodies in Escherichia coli
Dumont, Janice ULg; Menzer, Linda ULg; Scarafone, Natacha ULg et al

Poster (2009)

Six variants of human lysozyme (I56T, F57I, W64R, D67H, F57I/T70N and W112R/T70N) are associated with a hereditary non-neuropathic systemic amyloidosis. This disease involved an extra cellular deposition ... [more ▼]

Six variants of human lysozyme (I56T, F57I, W64R, D67H, F57I/T70N and W112R/T70N) are associated with a hereditary non-neuropathic systemic amyloidosis. This disease involved an extra cellular deposition of amyloid fibrils made of lysozyme variants in a wide range of organs such as liver, spleen and kidneys [1]. The characterisation at the molecular level of two variants, I56T and D67H, has shown that these mutations reduce the stability and more particularly the global cooperativity of the protein. Consequently, under physiologically relevant conditions, these variants can transiently populate a partially unfolded state in which the beta-domain and the C-helix are cooperatively unfolded while the rest of the protein remains native like [1]. The formation of intermolecular interactions between the regions that are unfolded in this intermediate state is likely to be a fundamental trigger of the aggregation process that ultimately leads to the formation and deposition of fibrils in tissues. In order to study the effects of the other amyloidogenic mutations on the properties of lysozyme and thus to get more insight in the mechanism of amyloid formation, it is necessary to produce them in large quantities. The D67H, I56T and F57I variants are currently produced in Aspergillus niger; the expression in this organism is, however, time consuming and the yield is very low. The attempts to use alternative systems such as Pichia pastoris [2], Saccharomyces cerevisiae, and Arabidopsis thaliana have not been conclusive so far. In this work, we have produced the four single-point lysozyme variants as inclusion bodies in Escherichia coli and explored the possibility to refold them. [1] Dumoulin & al., (2006) Acc. Chem. Res., 39, 603 - 610 [2] Kumita & al., (2006) FEBS J., 273, 711-720 [less ▲]

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See detailVariation in DNA methylation patterns of Phaseolus bean interspecific hybrids leads to abnormal embryo and plant development
Abid, Ghassen ULg; Muhovski, Yordan; Jacquemin, Jean-Marie et al

Poster (2009)

Detailed reference viewed: 68 (18 ULg)
See detailMassive stars and emission-line stars with GAIA
Blomme, Ronny; Frémat, Y.; Lobel, Alex et al

Poster (2009)

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See detailAlcohol consumption and the prevalence of metabolic syndrome : a meta-analysis of observational studies
Alkerwi, A; Boutsen, M; Vaillant, M et al

Poster (2009)

Detailed reference viewed: 13 (1 ULg)
See detailMultipartite entanglement criterion from uncertainty relations
Gillet, Jérémie ULg; Bastin, Thierry ULg; Agarwal, G. S.

Poster (2009)

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See detailModelling and Simulation of Rat Swimming in a Water Maze Experiment
Fey, D.; Commins, Séan; Bullinger, Eric ULg

Poster (2009)

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See detailInteraction between the bioactive lipopeptide fengycin and lipid membrane
Deleu, Magali ULg; Campbell, Richard; Hellsing, Maya et al

Poster (2009)

Detailed reference viewed: 7 (2 ULg)
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See detailPhysicochemical characterization of fat blends related to margarine formulation
Danthine, Sabine ULg; Fernando Munoz, J; Cavillot, V et al

Poster (2009)

Detailed reference viewed: 18 (2 ULg)
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See detailMerovingian pottery in the Mosan Valley: diffusion and consumption
Van Wersch, Line ULg; Coquinot, Yvan; Mathis, François ULg et al

Poster (2009)

Detailed reference viewed: 69 (0 ULg)
See detailQuantum imaging using single photon sources
von Zanthier, J.; Thiel, C.; Bastin, Thierry ULg et al

Poster (2009)

Detailed reference viewed: 5 (0 ULg)
See detailGeneration of total angular momentum eigenstates in remote qubits
Maser, A.; Schilling, U.; Bastin, Thierry ULg et al

Poster (2009)

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See detailNeutrino masses in R-parity violating SUSY
Vicente, Avelino ULg

Poster (2009)

Detailed reference viewed: 8 (0 ULg)
See detailGeneration of total angular momentum eigenstates in remote qubits
Maser, A.; Schilling, U.; Bastin, Thierry ULg et al

Poster (2009)

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See detailReal-time spatial analysis of root water uptake in rhizotrons
Lobet, Guillaume ULg; Javaux, M.; Pages, L. et al

Poster (2009)

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See detailLancement d’un programme d’amélioration génétique de Jatropha curcas L. au Sénégal
Terren, Marieke ULg; Saverys, S.; Jacquet de Haverskercke, P et al

Poster (2009)

Detailed reference viewed: 27 (6 ULg)
See detailEvaluation de la diversité de la végétation spontanée de l’écosystème urbain de Bujumbura.
Bigirimana, J; Bogaert, Jan ULg; De Cannière, C et al

Poster (2009)

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See detailPast and future events specificity in bipolar disorders
Boulanger, Marie ULg; Lejeune, Aurélie; Blairy, Sylvie ULg

Poster (2009)

Previous research has shown that the individuals suffering from emotional disorders have specificity of autobiographical memory (AM) deficits. This difficulty to remember specific personal past events ... [more ▼]

Previous research has shown that the individuals suffering from emotional disorders have specificity of autobiographical memory (AM) deficits. This difficulty to remember specific personal past events seems related to difficulty to project specific oneself into the future (D’Argembeau, Raffard & Van der Linden, 2008). The aim of this study was investigated these impairments in population with bipolar disorders (BD). Participants (19 patients with bipolar disorders and 17 healthy subjects) completed validated French versions (Neumann & Philippot, 2006) of the AMT Williams & Broadbent (1986). Participants were instructed to generate specific past and future memories in response to cues words. For past events, the analyses revealed a significant group by memory interaction (F(2,68) = 4.0 ; p=.023) which indicates that the patients with BD recollected less specific events and more overgeneral events than controls. In the same way, for the future events task, a significant group by memory interaction emerged (F(2,68) = 7.85 ; p<.001) which indicates that the patients with BD were less specific and yielded more overgeneral memories than the control group. Thereby the results are consistent with previous studies that have examined autobiographical memory specificity in patients with BD (Scott et al., 2000; Mansell & Lam, 2004). However, to ours knowledges, the present study is the first to investigate specificity of AM and the abilities to generate specific events for future in patients with bipolar disorders. [less ▲]

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See detailEffects of acriflavine on trypanosomatids: ultrastructural, biochemical and molecular approaches
Manchester, T; Cavalcanti, DP; Simas, C et al

Poster (2009)

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See detailNicotine restores endothelial dysfunction caused by excess sFLT1 and sEng in in vitro model pf preeclamptic vascular endothelium
Mimura, Kazuya; Tomimatsu, Takuji; Sharentuya, Namuxila et al

Poster (2009)

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See detailEcological modeling and paedomorphosis: a study case in Montenegrin newts
Denoël, Mathieu ULg; Ficetola, Gentile; Cirovic, Rusa et al

Poster (2009)

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See detailMCF-7/BOS cells membrane proteome: comparison of two isolation methods using mass spectrometry
Bertrand, Virginie ULg; Massart, Anne-Cécile ULg; De Pauw-Gillet, Marie-Claire ULg et al

Poster (2009)

Membrane proteins (MP) play an important role in biological processes. Isolation and quantification of these MP using classical techniques is often limited due to their poor solubility and relatively low ... [more ▼]

Membrane proteins (MP) play an important role in biological processes. Isolation and quantification of these MP using classical techniques is often limited due to their poor solubility and relatively low abundance. These membrane proteins enclosed markers which could be potential therapeutic targets. These potential therapeutic targets have to be accessible to antibodies and need to be presented in the plasmic membrane. Assays were conducted on MCF-7 / BOS cell line, immortal and easier to cultivate. The goal of this work is to obtain an enriched membrane fraction to facilitate the analysis of the sample and to simplify the complex proteins mixture. To isolate transmembrane proteins, we compared two methods. The first one used different extraction cycles characterized by different buffers to isolate membrane proteins. The second method labelled accessible extracellular domains at the surface of MCF-7 cells with biotin prior to differential centrifugation. The obtained enriched membrane proteome was digested with trypsin and/or Lysyl Endopeptidase. Obtained peptides were separated by 2D-HPLC chromatography and on-line analysed ion trap mass spectrometer, the Esquire HCT. [less ▲]

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See detailFluctuation of sediment production during the last millennia in the Ardenne Massif (Belgium)
Houbrechts, Geoffrey ULg; Notebaert, Bastiaan; Petit, François ULg et al

Poster (2009)

In the Ardenne massif, floodplains have recorded fluctuations in the production of sediment and several periods of increased sediment deposition have been identified. Before the first deforestations ... [more ▼]

In the Ardenne massif, floodplains have recorded fluctuations in the production of sediment and several periods of increased sediment deposition have been identified. Before the first deforestations rivers developed multiple channels in alluvial forests. Floodplains were not well-developed and probably very humid, which explains the presence of peat layers within the alluvial sequences. In the Amblève catchment, the first increased sedimentary deposition of the Holocene occurred during the Bronze Age (3200 BP), in relation to deforestation and the first crop cultures in the area. An organic deposition has occurred around 2700 BP and could correspond with a period of climatic degradation. Several peat layers have also been dated to around 1000 BP and probably indicate very low anthropogenic pressure. From the 11th Century onwards, there was an increase in sedimentation and a greater concentration of charcoal is present in the alluvial deposits. In many catchments there is an important increase in the sedimentation at the end of the 14th century, which can be related to the development of many iron factories. Analyses of slag concentration produced in these former factories allow us to reconstruct the evolution of the floodplain topography since the inception of the iron industries, in relation to the periods of activity. Total sedimentation in the smaller valleys since the initiation of iron industries amounts 0.5 to 1.0 m, which is in most cases about 50% of the total sediment present in the floodplains and corresponds to a mean sedimentation rate ranging between 10 and 20 cm/century. Such values are explained by various former agricultural practices and forest clearings associated with the huge demand for charcoal by the iron industry. About 20 ha of forest were cleared for the yearly consumption of a refining forge or a blast furnace and more than three hundred iron factories existed in the Ardenne Massif between the 14th and the 19th century. [less ▲]

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See detailEmission line stars in the Milky Way with the GAIA space mission
Martayan, C.; Frémat, Y.; Blomme, R. et al

Poster (2009)

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See detailA prospective randomized multicenter trial of darbepoetin-alfa and I.V. iron administration after autologous hematopoietic stem cell transplantation.
Beguin, Yves ULg; Maertens, J.; DE PRIJCK, Bernard ULg et al

Poster (2009)

We conducted a multicenter prospective randomized study analyzing the impact of darbepoetin alfa (DA) with or mithout i.v. iron on erythroid recovery after autologous HCT.

Detailed reference viewed: 25 (7 ULg)
See detailEffect of phospholipids on surface properties of rapeseed oleosins at two pH
Vaca Medina, Guadalupe; Mouloungui, Zéphirin; Roiz, Julie ULg et al

Poster (2009)

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See detailEstimation of biochemical network parameter distributions in cell populations
Hasenauer, J; Waldherr, S; Schliemann, Monica ULg et al

Poster (2009)

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See detailEvaluation of the endorcine disrupting chemicals contamination in the North Sea porpoise population using in vitro assays
Didimo Imazaki, Pedro Henrique ULg; Brose, François ULg; Van Der Heiden, Edwige ULg et al

Poster (2009)

During the last decades, the production endocrine disrupting chemicals reached such levels that they are now spread all over nature. They are known to be very slowly degraded, decreasing the environmental ... [more ▼]

During the last decades, the production endocrine disrupting chemicals reached such levels that they are now spread all over nature. They are known to be very slowly degraded, decreasing the environmental quality and posing ecological risks. Marine mammals inhabiting polluted environments accumulate high levels of these chemicals, so they can be considered good indicators of marine pollution. Thirteen major organochloride pollutants were chosen to make subject of this study: o,p’-DDD; p,p’-DDD; p,p’-DDE; o,p’-DDT; p,p’-DDT; HCB; α-HCH; β-HCH; γ-HCH; δ-HCH; PCB 138; PCB 153 and PCB 180. All these chemicals will have their endocrine disrupting effects characterized individually and collectively by report gene expression assays. The MCF7-ERE cells used in these assays were produced in the Molecular Biology and Genetic Engineering Laboratory of the University of Liège and are originated from a human mammary carcinoma. They carry a gene expressing the synthesis of luciferase and controlled by oestrogen receptors. Then, the thirteen chemicals will be searched in the blubber tissues of porpoises by the use of gas chromatography-mass spectrometry. The blubber samples will also have their endocrine disrupting effect characterized. For the moment, the estrogenic effects of the HCH isomers were put in evidence. The next steps of this work must be soon accomplished. It is expected a great level of these compounds to be found in the samples. On the other hand, their endocrine disrupting effects and how they act in agonist, antagonist and synergist ways are subject that still needs to be cleared. [less ▲]

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See detailModelling and parameter estimation for heterogeneous cell populations
Waldherr, S; Hasenauer, J; Schliemann, Monica ULg et al

Poster (2009)

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See detailReaching the schools
Nazé, Yaël ULg

Poster (2009)

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See detailOptimisation of blocked designs in fMRI studies
Maus, Bärbel ULg; van Breukelen, G. J. P.; Goebel, R. et al

Poster (2009)

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See detail4th International Symposium on Chemosynthesis-based Ecosystems
Ponsard, J; Cambon-Bonavita, M-A; Lepoint, G et al

Poster (2009)

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See detailThe contribution of macroalgae to the assessment of the ecological quality of the rivers in Wallonia based on macrophytes indicator values in the British and French approaches.
Sossey Alaoui, Khadija ULg; Galoux, Daniel; Rosillon, Françis ULg

Poster (2009)

In accordance with the water Framework Directive (WFD, European Parliament & The Council of the European Union, 2000) defining the overall ecological status of rivers, many hundred sites were analysed in ... [more ▼]

In accordance with the water Framework Directive (WFD, European Parliament & The Council of the European Union, 2000) defining the overall ecological status of rivers, many hundred sites were analysed in the Walloon network. Within each sample, macroalgae data were gathered at species/or at genus level and the main water quality parameters were collected several times per year from 2005 to 2009. <br /><br />Seventeen species and genera cited in the French and English lists of macrophyte methods used to assess the ecological quality of rivers were considered. Within these sites, the ratio of the macroalgae among the contributory species was examined and the impact of these on the final scores of the River Macrophytes Nutrient index (United Kingdom, Wilby et al.,2006) and the biological macrophytic index in rivers (France, Haury et al., 2006) was analysed.At the same time, a ranking of these macroalgae along a trophy gradient has been established thanks to a principal component analysis of the physico-chemical parameters and a weighting of the species presence in a given waterbody by its abundance.The relationships between macroalgae scores and those found in France and in United Kingdom were studied using the Spearman rank correlation coefficient. <br /><br />Literature: <br /><br />European Parliament & The Council of the European Union, 2000. Directive 2000/60/EC of the European Parliament and of the Council establishing a framework for the Community action in the field of water policy. Official Journal of the European Communities 327: 1-72.Haury, J., M.-C. Peltre, M. Trémolières, J. Barbe, G. Thiébaut, I. Bernez, H. Daniel, P. Chatenet, G. Haan-Archipof, S. Muller, A. Dutartre, C. Laplace-Treyture, A. Cazaubon & E. Lambert-Servien, 2006. A new method to assess water trophy and organic pollution – the Macrophyte Biological Index for Rivers (IBMR): its application to different types of river and pollution. Hydrobiologia 570: 153-158. Willby, N., J. Pitt & G. Phillips, 2006. Summary of approach used in LEAFPACS for defining ecological quality of rivers and lakes using macrophyte composition. Draft Report January 2006. [less ▲]

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