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See detailImpact de la réforme de la PAC sur le secteur de la viande bovine dans le sud de la Belgique
Terrones Gavira, François ULg; Delille, Nicolas; Burny, Philippe ULg et al

Poster (2012)

En 2010, en Wallonie, région occupant le sud de la Belgique, les aides directes représentaient, en moyenne près de 103 % du revenu agricole familial par unité de travail familial (RAF/UTF) des ... [more ▼]

En 2010, en Wallonie, région occupant le sud de la Belgique, les aides directes représentaient, en moyenne près de 103 % du revenu agricole familial par unité de travail familial (RAF/UTF) des exploitations agricoles professionnelles de type « bovins à viande ». De plus, ce type d’exploitation est dépendant du dernier régime d’aide couplée à la production en Wallonie, la prime à la vache allaitante, qui représente plus de la moitié de leur revenu (55 %). Cette étude s’inscrit dans le cadre de la réflexion actuellement menée en Belgique sur les répercussions de la future réforme de la PAC et les effets de la diminution budgétaire combinée au passage du modèle historique au modèle régional ainsi qu’à la possible suppression de la prime à la vache allaitante. [less ▲]

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See detailThe P3 variability across healthy subjects using an auditory paradigm
Chatelle, Camille ULg; Lulé, Dorothée; Kübler, Andrea et al

Poster (2012)

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See detailNumerical simulation of DP steel damage using a physically-based GTN model
Fansi, Joseph; Habraken, Anne ULg; Balan, Tudor et al

Poster (2012)

Poster describing the identification and use of Gurson model on DP Steel

Detailed reference viewed: 58 (18 ULg)
See detailCognitive Flexibility in Mood Disorders
Piguet, C.; Strepenich, V.; Desseilles, Martin ULg et al

Poster (2012)

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Peer Reviewed
See detailEffect of humic substances on in vitro rooting and acclimatization of Alder (Alnus glutinosa (L.) Gaertn).
Tahiri, Abdelghani ULg; Destain, Jacqueline ULg; Druart, Philippe et al

Poster (2012)

Humic substances (HS) are organic compounds resulting from the physical, chemical and microbiological transformations of organic residues. Present every where in the nature; they are taking part in basic ... [more ▼]

Humic substances (HS) are organic compounds resulting from the physical, chemical and microbiological transformations of organic residues. Present every where in the nature; they are taking part in basic functionalities in any ecosystems involving soils, sediments, waterand landfills. They are heterogeneous and complex carbon macromolecules. Our study aims to compare the effect of HS on in vitro rooting and acclimatization of the Alder species (Alnus glutinosa (L.) Gaertn) as tree growing on river banks or wasted areas. [less ▲]

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See detailReproduction et production laitière de bovins sélectionnés ou de races locales au Burundi
Chapaux, Philippe; Knapp, Emilie ULg; Ngiyimbere, S et al

Poster (2012)

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See detailWhetstones in Gaul: Building a typology
Thiebaux, Aurélie ULg; Goemaere, Eric; Deru, Xavier ULg et al

Poster (2012)

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See detailEffect of water availability on milking frequency and yield of dairy cows milked in pastures by an automatic milking system.
Dufrasne, Isabelle ULg; Robaye, Vincent ULg; Knapp, Emilie ULg et al

Poster (2012)

Nowadays farmers have to manage larger herds but at the same time, want to benefit from a normal social life. The automatic milking system (AMS) can be a solution. Its use can reduce physical labour and ... [more ▼]

Nowadays farmers have to manage larger herds but at the same time, want to benefit from a normal social life. The automatic milking system (AMS) can be a solution. Its use can reduce physical labour and allow flexibility. This technology can result in a reduction in grazing even though grazing is considered as a natural practice of the cows which is appreciated by the consumers. However, the milking frequency is decreased when outdoor grazing rather than an indoor feed systems is combined with automatic milking system (AMS) are combined compared to an indoor system. On pasture, cows tend to visit the AMS by group and enter in close succession. Improved cow traffic would allow increased milking frequency and avoid long waiting before milking. In this aim, effect of water availability in the grazing paddocks on the frequencies of cow visits to was tested. [less ▲]

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See detailSolar Organic Rankine Cycle
Dumont, Olivier ULg

Poster (2012)

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See detailImpact of sequencing design on missing marker imputation and genomic selection in cattle
Druet, Tom ULg; MacLeod, Iona; Hayes, Ben

Poster (2012)

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See detailFire promotes downy brome (Bromus tectorum L.) seed dispersal
Monty, Arnaud ULg; Brown, Cynthia; Johnston, Danielle

Poster (2012)

Particularly well-known among the many impacts of the invasive annual grass downy brome (Bromus tectorum, Poaceae) is its ability to alter fire cycles and increase in abundance after fire. However, little ... [more ▼]

Particularly well-known among the many impacts of the invasive annual grass downy brome (Bromus tectorum, Poaceae) is its ability to alter fire cycles and increase in abundance after fire. However, little is known about how fire influences B. tectorum dispersal. We quantified fire effects on B. tectorum dispersal using three recently burned areas in the western region of the Colorado Rocky Mountains by marking diaspores (seeds) with fluorescent powder, and then recovering them at night using ultraviolet lights. Diaspores were of two types: with and without sterile florets attached. We also characterized vegetation cover and near-surface wind speed in burned and unburned areas. Diaspores travelled much farther in burned areas than in nearby unburned areas (means ± standard error at the end of the experiment: 209 ± 16 cm and 38 ± 1 cm, respectively; maximal distance at the end of the experiment: 2274 cm and 150 cm, respectively), indicating an increase in dispersal distance after fire. Diaspores with sterile florets attached dispersed longer distances than those without sterile florets (means ± standard error at the end of the experiment: 141 ± 14 cm and 88 ± 7 cm, respectively). Vegetation cover was lower and wind speeds were higher in the burned areas. Our results indicate that at least one of the mechanisms by which the spread of B. tectorum is promoted by fire is through increased seed dispersal distance. Preventing movement of seeds from nearby infestations into burned areas may help avoid the rapid population expansion often observed. [less ▲]

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See detailConstruction and pre-validation of a cognitive ergonomics questionnaire for work holding in multiple sclerosis patients : The QUIPSEP
DELRUE, Gaël ULg; MONISSE, Aurélie; Blavier, Adelaïde ULg et al

Poster (2012)

We describe how we build and pre-validate a cognitive ergonomics questionnaire for multiple sclerosis patients actually employed, the QUIPSEP. This questionnaire must help us better manage our patients ... [more ▼]

We describe how we build and pre-validate a cognitive ergonomics questionnaire for multiple sclerosis patients actually employed, the QUIPSEP. This questionnaire must help us better manage our patients and thei potentiel difficulties in work situation from a cognitive ergonomic point of view. [less ▲]

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See detailCortical interneurons tangential migration : p27(Kip1) as a novel master regulator.
Godin, Juliette ULg; Thomas, Noémie; Laguesse, Sophie ULg et al

Poster (2012)

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See detailHDAC5 depletion modulates heterochromatin plasticity and triggers programmed cell death of human cancer cells
Peixoto, P; Castronovo, V; Matheus, N et al

Poster (2012)

Detailed reference viewed: 41 (6 ULg)
See detailNeuroimaging of emotional stroop task performance and mood changes in bipolar disorders
Rey, Gwladys; Desseilles, Martin ULg; Favre, Sophie et al

Poster (2012)

Detailed reference viewed: 11 (1 ULg)
See detailp27(Kip1) as a master regulator of cortical neuron migration.
Godin, Juliette ULg; Thomas, Noémie; Laguesse, Sophie ULg et al

Poster (2012)

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See detailStudy of agronomic constraints to the dissemination of the cultivation of Jatropha curcas L. in Senegal
Terren, Marieke ULg; Saverys, S.; Jacquet de Haveskercke et al

Poster (2012)

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Peer Reviewed
See detailThe sheepshead minnow Cyprinodon variegatus as a marine vertebrate model for investigating endocrine disrupting effects of triclosan
Schnitzler, Joseph ULg; Gauthray, Ghislain ULg; Silvestre, Frédéric et al

Poster (2012)

Zebrafish (Danio rerio) has been a prominent model in toxicology. This freshwater species present many advantages both in identifying endpoints of toxicity and in elucidating mechanisms of toxicity ... [more ▼]

Zebrafish (Danio rerio) has been a prominent model in toxicology. This freshwater species present many advantages both in identifying endpoints of toxicity and in elucidating mechanisms of toxicity. However, marine toxicologists lack such omnipotent model displaying similar advantages to zebrafish: small size, rapid breeding, and easy maintenance. We propose here the use of the sheepshead minnow Cyprinodon variegatus to define thyroid-disrupting effects of triclosan during pre-hatching development. Three females and two males were placed in each of the three breeding chambers designed for this experiment. More than 300 eggs were collected over three days and maintained in seawater with triclosan concentrations at 0, 100 ng.L-1, and 100 µg.L-1. Exposure of larvae to triclosan lasted until hatching. After hatching (six days post-spawning), 5 larvae per condition were placed in Bouin’s fixative for brain and thyroid histology. Length and body mass were measured. The body was frozen at -80oC to determine muscle thyroid hormone levels (T3 and T4), using radio-immunoassay techniques. Hatching success, in vivo observations, gross observation, thyroid hormone levels, histology will be determined and discussed in the framework of whether or not triclosan may alter thyroid metabolism during pre-hatching period of the sheepshead minnow. [less ▲]

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See detailModeling of ligand induced changes in the magneto-structural properties of Pd13 cluster
Fresch, Barbara ULg; Remacle, Françoise ULg

Poster (2012)

Palladium nanostructures are widely used as catalyst of many organic reactions1 and present intriguing and controversial magnetic properties. Since the direct experimental determination of ground state ... [more ▼]

Palladium nanostructures are widely used as catalyst of many organic reactions1 and present intriguing and controversial magnetic properties. Since the direct experimental determination of ground state structure for small transition metal clusters is difficult, theory and first-principles calculations, such as density functional theory (DFT), have been used extensively to reveal the interplay between geometric and electronic structure. We present a theoretical study at the DFT/B3LYP level on three selected geometric arrangements for the Pd13 cluster with particular emphasis on the effects of thiolate and phosphine based ligands on their magneto-structural properties. The results point out that the interactions with ligands can change the relative stability of different structures of the metallic core, leading to the stabilization of the more compact icosahedral shape with respect to other bi-layer structures which are more stable in the free standing cluster. Beyond this structural evolution, the interactions with the ligand shell strongly modify also the electronic and magnetic properties of the metal core. In particular, both thiolate and phosphine ligands quench the high spin state that characterized the magnetic ground state of the bare Pd13 cluster, but while the interaction with phosphine quench the magnetic moment completely, the thiol-capped particles retain a permanent magnetic moment even when they are saturated by the ligand molecules. Our study suggests that different ligands can be effectively used to tune electronic and magnetic properties of Pd nanoparticles in view of the design and experimental realization of logic nano devices and intelligent sensors. [less ▲]

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See detailHuntingtin mediates anxiety/depression-related behaviors and hippocampal neurogenesis.
M'Barek, K. Ben; Orvoen, S.; Pla, P. et al

Poster (2012)

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See detailIMAGING FINDINGS IN HORSES WITH PHARYNGEAL SQUAMOUS CELL CARCINOMA
Etienne, Anne-Laure ULg; Evrard, Laurence ULg; Bolen, Géraldine ULg et al

Poster (2012)

Introduction Squamous cell carcinoma (SCC) has been occasionally reported in the equine pharyngeal region1-3. The aim of this poster is to describe imaging findings in 4 cases of pharyngeal SCC. Material ... [more ▼]

Introduction Squamous cell carcinoma (SCC) has been occasionally reported in the equine pharyngeal region1-3. The aim of this poster is to describe imaging findings in 4 cases of pharyngeal SCC. Material and methods Four old horses, mean age 19.5, 2 females and 2 geldings, were referred for dyspnea (3/4) and/or dysphagia (3/4). Because of dyspnea radiographs were realized prior to endoscopy. Ultrasound (US) was performed in all cases by ventral and lateral approach using a linear 7,5MHz transducer. A post-mortem computed tomography (CT) of the head was performed in one case (16 slices CT, Somatom 16, Siemens). Results Radiographic opacity of the pharyngeal region was increased in all cases. A soft tissue mass was also visible in the caudal maxillary sinus in 1 horse. The epiglottis was either not recognized or difficult to see with an abnormal shape. Pharyngoepiglottic distance and nasopharyngeal diameter were reduced in all cases. The soft palate was either thick or impossible to be outlined, with an irregular surface. In 1 case it was dorsally displaced. The dorsal pharyngeal wall looked unevenly thickened or impossible to be outlined ventrally due to border effacement. No bony damage was identified on radiographs. A hypoechoic heterogeneous mass was visualized at US in 2 cases and an enlargement of the mandibular lymph nodes was observed in 3 cases. Lymphnodes had also heterogeneous echogenicity and increased doppler signal in 1 case. Oral and pharyngeal endoscopic examination confirmed a pharyngeal mass in 2 cases but was unsuccessful or incomplete because of passage impairment in 2. CT revealed maxillary bone lysis in the horse with a mass in the maxillary sinus. Histopathological examination of local biopsies or necropsy revealed pharyngeal SCC invading epiglottis, pharyngeal wall and soft palate in the 4 horses and the maxillary sinus in one. Discussion/Conclusion Because endoscopy can be impaired by the size of the mass, radiology is helpful in estimating the extent and invasiveness of the process and US to confirm lymphadenopathy. However because of its relatively low sensitivity and the local increased opacity, radiographic examination may underestimate bone lysis. [less ▲]

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Peer Reviewed
See detailSpotlight on Babesiosis in Belgium
Lempereur, Laetitia ULg; Shiels; Saegerman, Claude ULg et al

Poster (2012)

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See detailPrecisely controlled mesoporous films to assess the role of architecture in Li‐ion batteries
Krins, Natacha ULg; Buonsanti, Raffaella; Shukla, Alpesh K. et al

Poster (2012)

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See detailA RAPID VALIDATED UHPLC-PDA METHOD FOR ANTHOCYANINS QUANTIFICATION FROM EUTERPE OLERACEA FRUITS
Dias, A.L.S.; Rozet, Eric ULg; Chataigne, G et al

Poster (2012)

Commercialization of Euterpe oleracea fruit has increased because of its abundance in anthocyanins [1]. Characterizations of these compounds are important for the food industry. The aim is to validate an ... [more ▼]

Commercialization of Euterpe oleracea fruit has increased because of its abundance in anthocyanins [1]. Characterizations of these compounds are important for the food industry. The aim is to validate an UHPLC-PDA method for major anthocyanins quantification in this fruit after fast extraction procedures and samples preparation. Fruits were harvested in Abaetetuba (Brazil) and extracted sequencially by EtOAc, MeOH and MeOH 50% all at 0.1% HCl. A HSS C18 column (1.8µm) was used with a gradient elution of ACN and 5% HCOOH. Total error and accuracy profiles were used as validation criteria. A first EtOAc extraction removes the lipophilic compounds and allows an easier extraction by MeOH and quantification of anthocyanins in this extract. It was found to be faster (17 min) that HPLC-UV methods [2]. Calibration in the matrix was found to be more accurate than calibration without matrix. Trueness (<6.76% relative bias), repeatability (<4.6% RSD), intermediate precision (<5.3% RSD), selectivity (by UHPLC-ESI+-HRMS), response function and linearity for cyanidin-3-glucoside and cyanidin-3-rutinoside were evaluated. The concentration range validated was 1 to 48 µg/mL for both compounds. [less ▲]

Detailed reference viewed: 46 (0 ULg)
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See detailExtensions of the Background/biResonant decomposition
Denoël, Vincent ULg

Poster (2012)

Detailed reference viewed: 13 (1 ULg)
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See detailPreliminary results on growing tree roots in vitro in presence of humic substances
Tahiri, Abdelghani ULg; Destain, Jacqueline ULg; Druart, Philippe et al

Poster (2012)

Humic substances (HS) are organic compounds resulting from the physical, chemical and microbiological transformations of organic residues. Present everywhere in the nature; they are taking part in basic ... [more ▼]

Humic substances (HS) are organic compounds resulting from the physical, chemical and microbiological transformations of organic residues. Present everywhere in the nature; they are taking part in basic functionalities in any ecosystems involving soils, sediments, water and landfills. They are heterogeneous and complex carbon macromolecules. Our study aims to determine the main biological properties of HS on plant growth in relation to their physicochemical properties. [less ▲]

Detailed reference viewed: 20 (4 ULg)
Peer Reviewed
See detailTechnical pitfalls in cardiac CT angiography : what the radiologist should know
GHEKIERE, O; DJEKIC, JULIEN; MANCINI, ISABELLE et al

Poster (2012)

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See detailOxygen transfer in inverse fluidized bed during biosurfactant production by Bacillus subtilis
Fahim, S.; Dimitrov, K.; Vauchel, P. et al

Poster (2012)

Detailed reference viewed: 26 (1 ULg)
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See detailCreatinine and/or cystatin C-based GFR estimation in HIV-infected patients.
Gagneux-Brunon, A; DELANAYE, Pierre ULg; Fresard, A et al

Poster (2012)

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See detailIn silico genome mining, a new approach to detect novel lipopeptides potentially involved in biological control
Leclere, V.; Krier, F.; Deravel, J. et al

Poster (2012)

Detailed reference viewed: 17 (1 ULg)
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See detailPerformance, limitations and utility of cystatin C as an endogenous GFR marker in renal transplantation
Masson, I; Maillard, N; Tack, I et al

Poster (2012)

Detailed reference viewed: 1 (0 ULg)
See detailInvestigation of the glucose metabolisme of the chicken embryo by injection of insulin
Franssens, Lies; Koppenol, Astrid; Wang, Yufeng et al

Poster (2012)

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See detailAction parsing in compulsive checking
Belayachi, Sanaa ULg; Van der Linden, Martial ULg

Poster (2012)

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See detailEffects of Physical Activity on the Aging of Motor and Perceptual Inhibition
Albinet, Cédric; Boucard, Grégory; Collette, Fabienne ULg et al

Poster (2012)

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See detailPrevalence of naturally occuring cartilage defects in the ovine stifle
Pierson, Audrey ULg; Muylkens, Benoît ULg; Hontoir, Fanny et al

Poster (2012)

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See detailSurface and bio-adhesion properties of new hydrophobic and current materials for artificial intraocular lens
Bertrand, Virginie ULg; Svaldo Lanero, Tiziana ULg; Duwez, Anne-Sophie ULg et al

Poster (2012)

A high bio-adhesion appears to be one of the key factor for posterior capsular opacification (PCO) prevention. Indeed, the proteins adsorption and the lens epithelial cells (LEC) adhesion both contribute ... [more ▼]

A high bio-adhesion appears to be one of the key factor for posterior capsular opacification (PCO) prevention. Indeed, the proteins adsorption and the lens epithelial cells (LEC) adhesion both contribute to PCO development. We present in this work the comparison of a new glistening free hydrophobic material (GF® from Physiol) with benchmark hydrophobic and hydrophilic materials regarding their chemicophysical properties and their respective ability to interact with lens epithelial cells and proteins. For this purpose, we determined the hydrophobicity by contact angle measurement (assessed by water drop and air bubble methods), the surface adhesiveness by atomic force microscopy (AFM), the proteins adsorption by fluorescent measurement and the LEC adhesion by the determination of cell density. The new hydrophobic material presents comparable hydrophobicity, proteins adsorption and LEC adhesion to current commercial hydrophobic material. Its adhesiveness, measured with the AFM, is intermediate between hydrophilic and hydrophobic materials. In conclusion, the bio-adhesion properties of this new glistening free hydrophobic IOL material are similar to generic hydrophobic acrylic materials and therefore should to the same extent prevent PCO. [less ▲]

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See detailClassification Trees based on infrared spectroscopic data to discriminate between genuine and counterfeit medicines.
Deconinck, Eric; Sacre, Pierre-Yves ULg; Coomans, Danny et al

Poster (2012)

Due to the extension of the internet, counterfeit drugs represent a growing threat for public health in the developing countries but also more and more in the industrial world. In literature several ... [more ▼]

Due to the extension of the internet, counterfeit drugs represent a growing threat for public health in the developing countries but also more and more in the industrial world. In literature several analytical techniques were applied in order to discriminate between genuine and counterfeit medecines. One thing all these techniques have in common is that they generate a huge amount of data, which is often difficult to interpret in order to see differences between the different samples and to determine the cause of the differences. The majority of the authors make use of explorative chemometric tools to visualise the differences in the data obtained for the different samples. Even if some of the applied methods could be able to give a model with predictive ability, only a few authors created a model able to predict if a sample is counterfeit or not. Classification trees built with the Classification And Regression Tree algorithm were evaluated for modelling infrared spectroscopic data in order to discriminate between genuine and counterfeit drug samples and to classify counterfeit samples in different classes following the RIVM classification system. Models were built for two data sets consisting of the Fourrier Transformed Infrared spectra, the Near Infrared spectra and the Raman spectra for genuine and counterfeit samples of respectively Viagra® and Cialis®. Easy interpretable models were obtained for both models. The models were validated for their descriptive and predictive properties. The predictive properties were evaluated using both cross validation as an external validation set. The obtained models for both data sets showed a 100% correct classification for the discrimination between genuine and counterfeit samples and 83.3% and 100% correct classification for the counterfeit samples for the Viagra® and the Cialis® data set respectively. [less ▲]

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See detailDevelopment of a regional-scale library of near infrared reflectance soil spectra for alternative assessment of soil characteristics in Southern Belgium
Genot, Valérie ULg; Dardenne, Pierre; Bock, Laurent ULg et al

Poster (2012)

In Walloon Region (Southern Belgium), five routine soil laboratories are grouped within a network promoting a better quality in analysis (www.requasud.be). The harmonization of protocols as well as ... [more ▼]

In Walloon Region (Southern Belgium), five routine soil laboratories are grouped within a network promoting a better quality in analysis (www.requasud.be). The harmonization of protocols as well as methodological or technical prospective are realized under scientifically supervision of our research laboratory. In this context, a study was conducted to evaluate the ability of the NIRS to predict some soil properties: CEC, TOC, TN and clay content. The initial models were elaborated upon local PLS regression on set of 1 300 soil samples. The local PLS calibration used allows an accurate prediction of the soil properties and precision of NIRS technique is comparable to reference analytical method [less ▲]

Detailed reference viewed: 23 (2 ULg)
See detailThe histone variant macroH2A regulates the commitment of embryonic and adult stem cells
Creppe, Catherine ULg; Cantariño, N; Janich, P et al

Poster (2012)

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See detailHCV screening in African (Malian) women : relevancy of the HCV NS3 epitope
BOUHARE, NOUHOUM; VAIRA, Dolorès ULg; GOTHOT, André ULg et al

Poster (2012)

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See detailStudy of HCV and HIV infections in Mali: Comparative Epidemiology and Risk Factors
BOUHARE, NOUHOUM; VAIRA, Dolorès ULg; GOTHOT, André ULg et al

Poster (2012)

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See detailEvaluation of aptamers for targeted radiotherapy: Binding specificity and labelling with natural lutetium
Gijs, Marlies ULg

Poster (2012)

Many cancer patients suffer from serious side effects when treated with external beam radiotherapy or chemotherapy because of damage to healthy tissues by lack of selectivity. In this regard, specific ... [more ▼]

Many cancer patients suffer from serious side effects when treated with external beam radiotherapy or chemotherapy because of damage to healthy tissues by lack of selectivity. In this regard, specific targeting of tumours through radiopharmaceuticals is increasingly considered as a promising strategy in oncology. Radiopharmaceuticals consist of a radionuclide coupled to a vector that specifically targets cancer-related molecules. Aptamers are small (5-15 kDa) synthetic oligonucleotides (DNA or RNA) that possess several advantages compared to other vectors, such as an relatively easy and cheap chemical synthesis allowing the introduction of different chemical modifications, a selection possible against almost every target, a non-immunogenicity and a good tumour penetration. That is why aptamers are regarded as promising molecules for the development of radiopharmaceuticals. An aptamer targeting the Human Epidermal growth factor Receptor 3 (HER3), which plays an important role in cancer development and progression, was chosen for the development of aptamer-based radiopharmaceuticals. [less ▲]

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See detailBone marrow-derived mesenchymal stromal cells failed to prevent experimental xenogeneic graft-versus-host disease
Bruck, France; de Leval, Laurence; Belle, Ludovic ULg et al

Poster (2012)

Detailed reference viewed: 45 (18 ULg)
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See detailRegeneration pos-fire of herbaceous communities of campos rupestres (tropical altitude grasslands)
Hernandez, Pauline; Le Stradic, Soizig ULg; Buisson, Elise et al

Poster (2012)

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See detailAssociation entre le contrôle de la pression artérielle et le rapport sodium/potassium urinaire chez les transplantés rénaux hypertendus
Saint-Remy, Annie ULg; SOMJA, Mélanie ULg; WEEKERS, Laurent ULg et al

Poster (2011, December 15)

Design and method : Office blood pressure (OBP) and home BP (HBP) were measured in 70 kidney transplant patients (KT) (43 men/27 women;KT>1 year), all were treated with antihypertensive drugs (mean number ... [more ▼]

Design and method : Office blood pressure (OBP) and home BP (HBP) were measured in 70 kidney transplant patients (KT) (43 men/27 women;KT>1 year), all were treated with antihypertensive drugs (mean number: 2±1). Mean age: 56±11 years, mean graft survival: 7±6.6 years, mean GFR: 65.6±24 ml/min, diabetes:27% and current smoking:11.5%. HBP (Omron M6) was measured during 7 days following the OBP measurement, mean HBP was calculated from day 2 to day 7. Uncontrolled BP was defined by OBP>=140-90 (>=130-80 when diabetes) and HBP>=135-85 (>=130-80 when diabetes). The day of the OBP measurement and the last day of HBP, patients collected 24h- urine and recorded at the same time their food and beverage consumption. Sodium and potassium were measured in urines and their intakes were quantified through food records. Urinary and diet Na+, K+ did not differ between the two urine collections 7 days apart. Results: 16 patients(23%) had controlled BP (OBP and HBP) while 34 (49%) remained with sustained hypertension (SHT) despite treatment, 14 (20%) had masked uncontrolled hypertension (MHT, OBP<140-90 and HBP>=135-85,130-80 if diabetes for both).When comparing the controlled and SHT, no differences were found with age, graft survival, BMI, GFR, calcineurin inhibitors or number and type of antihypertensive drugs. The groups did not differ by their sodium excretion (154±93 vs 162±88 mmol/24h) but well by their K excretion significantly higher in controlled patients (68±17 vs 53±20 mmol/24h,p=0.018) giving a Na/K ratio higher in SHT (3.2±1.3 vs2.2±1.2,p=0.03). Diet analysis showed significantly higher intakes of K (fruits, vegetables) in controlled patients (3279±753 vs 2208±720 mg/24h,p=0.010) whereas both groups consumed on average 9 g/24h of salt. When controlled for age, BMI and Na excretion, Home systolic BP was inversely and significantly correlated with urinary potassium (- 0.46;P=0.002) while no correlation was found with urinary Na.Conclusions: KT patients remaining hypertensive and well controlled patients had both high salt consumption. However, well controlled patients differed by significant higher potassium intakes and excretion. Urinary Na/K ratio could be a useful tool contributing to an optimal BP control in KT patients. However, impact of increasing potassium intakes on uncontrolled BP in KT has to be validated by prospective randomized studies [less ▲]

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See detailFonctions visuo-perceptives et spatiales chez les enfants IMC
Schmetz, Emilie ULg; Detraux, Jean-Jacques ULg

Poster (2011, December 12)

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See detailCaractérisation des viandes bovines à très longue durée de conservation sous vide
Didimo Imazaki, Pedro Henrique ULg; Nezer, Carine ULg; Taminiau, Bernard ULg et al

Poster (2011, December 09)

Le but de cette étude a été d’évaluer la conservabilité de viandes bovines de différentes origines (Royaume-Uni et Irlande, Australie et Brésil) et l’influence sur celle-ci de la température de ... [more ▼]

Le but de cette étude a été d’évaluer la conservabilité de viandes bovines de différentes origines (Royaume-Uni et Irlande, Australie et Brésil) et l’influence sur celle-ci de la température de conservation (1 °C vs. +4 °C). Des paramètres physico-chimiques (pH, couleur, proportion des différentes formes redox de la myoglobine (FRMb), indice TBARS et acides organiques) et microbiologiques (flore aérobie totale, flore lactique, Enterobacteriaceae, Pseudomonas spp. et Brochothrix thermosphacta) ont été mesurés sur sept lots de contre-filet conditionnés sous vide : aux ⅔ de la DLC et à la fin de la DLC. La diversité bactérienne a été évaluée par galeries API50 CHL et par métagénomique. Le pH a diminué au cours de la conservation dans deux lots. La couleur et la proportion des FRMb sont restées stables. Une augmentation de l’indice TBARS, plus prononcée à +4 °C, a été observée. Les viandes australiennes et brésilienne ont présenté des taux en acides acétique et citrique plus élevés. Tous les lots conservés à 1 °C ont présenté une qualité microbiologique satisfaisante à la fin de leur DLC (viandes britanniques et irlandaises = 35 ~ 45 jours; australiennes = 140 jours et brésilienne = 120 jours). La conservation à +4 °C a favorisé la croissance d’entérobactéries, facteur limitant de la conservation de plusieurs lots. L’identification bactérienne a révélé la présence de bactéries connues pour leur effet bioprotecteur. La phase ultérieure de ce travail consistera à étudier la dynamique de la flore microbienne endogène en fonction des conditions environnementales appliquées (température, atmosphère). [less ▲]

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See detailZoonotic diseases in pet birds -a short review
Boseret, Géraldine ULg

Poster (2011, December 09)

The term « Pet bird » designates birds housed and breeded for an exclusively ornamental use. This category includes mainly Passeriformes (canaries, finches…) and Psittaciformes (parrots, parakeets…), and ... [more ▼]

The term « Pet bird » designates birds housed and breeded for an exclusively ornamental use. This category includes mainly Passeriformes (canaries, finches…) and Psittaciformes (parrots, parakeets…), and is a not-so-well known vet’s clientship fraction. Many families indeed own their « kitchen canary », which represent a lucrative business for pet shops or local breeders (e.a. via birds fairs and markets). Besides, some birds are bred for their very high value; for example, in the case of canaries, male and female reproductors with recognized genetic potential are presented in international contests for their posture (the Bossu Belge : fig 1a), their colour (red mosaic: fig 1b) and for their song (Harzer: fig 1c) and sold for rising prices. Finally, exotic birds like parrots (ara, cockatoo…), legally or illegaly traded from Asia, are however very popular pets and profusely represented in zoos and parks. Notwithstanding these economic facts, these animals are potential carriers and/or transmitters of zoonotic diseases. Some of them could have an important impact on human health, like ornithosis, salmonellosis or even H5N1 high pathogenic avian influenza. This review, although non exhausive, has as aim to enlighten, by the description of several cases of birds-humans transmission the risks encountered by birds owners, including children, and on another point of view to assess the potential economic consequences. [less ▲]

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See detailPsychrotrophic and psychrophylic Clostridium responsible for meat spoilage
Rodrigues, A.; Daube, Georges ULg

Poster (2011, December 09)

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See detailRetrospective analysis of a Listeria monocytogenes contamination episode of cheese made from raw goat’s milk using quantitative microbial risk assessment
Delhalle, Laurent; Ellouze, M.; Yde, M. et al

Poster (2011, December 09)

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See detailLes races de poules belges de grande taille
Moula, Nassim ULg; Jacquet, Michel; Verelst, Andy et al

Poster (2011, December 09)

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See detailGestion des ressources génétiques animales par les éleveurs de dromadaires de la région d’Ansongo (Mali).
Traore, Bakary; Ouologuem, Bara; Antoine-Moussiaux, Nicolas ULg et al

Poster (2011, December 09)

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See detailLa gouvernance environnementale au Sri Lanka
Rosillon, Caroline ULg

Poster (2011, December 08)

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See detailLe projet de recherches SAFE
Marique, Anne-Françoise ULg; De Meester, Tatiana; De Herde, André et al

Poster (2011, December 08)

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See detailAssessment of Mytilus galloprovincialis to monitor 19 trace elements in the Calvi Bay
Richir, Jonathan ULg; Vermeulen, Simon; Biondo, Renzo ULg et al

Poster (2011, December 08)

Mussel caging with Mytilus galloprovincialis has been successively used to monitor classic trace metal (Cd, Cu, Zn, Cr, Fe, Ni, Pb) pollution of Mediterranean coastal waters at spatial scales ranging from ... [more ▼]

Mussel caging with Mytilus galloprovincialis has been successively used to monitor classic trace metal (Cd, Cu, Zn, Cr, Fe, Ni, Pb) pollution of Mediterranean coastal waters at spatial scales ranging from 10 to 100km. However, its relevance as bioindicator at smaller scales (100 m - 1 km) is poorly known. Moreover, the levels of some little studied trace elements (Al, V, Mn, Sb, Sn, Ag, Mo, Se, As, Co, Be, Bi), recently identified as potential pollutants of coastal environments, have not yet been assessed in that species. In this work, M. galloprovincialis was used to monitor the 19 listed trace elements at the scale of the Calvi Bay (NW Corsica, France). Additionally, we investigated decontamination kinetics and trace element tissue speciation before and after spawning. Mytilus galloprovincialis trace element levels reflect the good water quality of the Calvi Bay, showing little spatial variations either at 100m or 1km scales. Filter feeders are only influenced by their relatively homogeneous pelagic environment (dissolved trace elements and suspended particulate matters), in contrast to organisms which inhabit typically heterogeneous benthic habitats. This bioindicator, a convincing candidate for the monitoring of the 12 little studied trace elements, effectively accumulates the 19 studied elements to 105 seawater concentrations. Mytilus galloprovincialis rapidly equilibrates (within days) with its environment, and is therefore a good indicator of chronic and stable chemical pollutions. Tissue speciation shows that the most relevant organ to monitor trace elements is the hepatopancreas. However, the important variability induced by the reproductive cycle of mussels requires using this bioindicator during its sexual dormancy. [less ▲]

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See detailDesign of reversibly disulfide core cross-linked polymer micelles
Cajot, Sébastien ULg; Schol, Daureen ULg; Danhier, F. et al

Poster (2011, December 07)

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See detailShallow heat injection and storage experiment monitored with electrical resistivity tomography and simulated with heat transport model
Hermans, Thomas ULg; Daoudi, Moubarak ULg; Vandenbohede, Alexander et al

Poster (2011, December 06)

Groundwater resources are increasingly used around the world as geothermal systems. Understanding physical processes and quantification of parameters determining heat transport in porous media is ... [more ▼]

Groundwater resources are increasingly used around the world as geothermal systems. Understanding physical processes and quantification of parameters determining heat transport in porous media is therefore important. To monitor the geothermal behavior of groundwater systems and to estimate the governing parameters, we rely mainly on borehole observations of the temperature field at a few locations (temperature logs or thermal response test). In analogy to research in hydrogeophysics, geophysical methods may be useful in order to yield additional information for thermal properties estimation with greater coverage than conventional wells. We report a heat transport study during a shallow heat injection and storage field test. Heated water (about 50°C) was injected for 6 days at the rate of 80 l/h in 10.5°C aquifer. Since bulk electrical resistivity variations can bring important information on temperature changes in aquifers (water electrical conductivity increases about 2%/°C around 25°C), we monitored the test with surface electrical resistivity tomography and demonstrate its ability to monitor spatially temperature variations. Time-lapse electrical image clearly show the decrease and then the increase in bulk electrical resistivity of the plume of heated water, during respectively the injection and the storage phase. This information enabled to calibrate the conceptual flow and heat model used to simulate the test (using SEAWAT). Inverted resistivity values are validated with borehole electromagnetic measurements (EM39) and are in agreement with the temperature logs used to calibrate the parameters of the thermo-hydrogeological model. This field work demonstrates that surface electrical resistivity tomography can monitor heat and storage experiments in shallow aquifers. These results could potentially lead to a number of practical applications, such as the monitoring or the design of shallow geothermal systems. Moreover, sensitivity analyses and collinear diagnostic were used to assess the pertinence of the flow and heat model parameters. The most sensitive parameter is the conductivity of the solid followed by the porosity, heat capacity of the solid and the longitudinal dispersivity. This indicates the predominance of conductive transport during the storage phase over the convective transport during the injection phase. These values rely only on temperature logs and more parameters could be derived or more robust values could be achieved with the use of geophysical data in a coupled inversion scheme. [less ▲]

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See detailNew glucose-responsive polyelectrolyte microcapsules
Alaimo, David ULg; Detrembleur, Christophe ULg; Auzély-Velty, Rachel et al

Poster (2011, December 06)

Diabetes is a disorder of glucose regulation, characterized by an accumulation of glucose in the blood. The breakdown of glucose regulation can be attributed to the pancreas’s inability to secrete insulin ... [more ▼]

Diabetes is a disorder of glucose regulation, characterized by an accumulation of glucose in the blood. The breakdown of glucose regulation can be attributed to the pancreas’s inability to secrete insulin or to the body’s inability to properly use it. The usual treatment for type 1 diabetes consists in multiple subcutaneous insulin injections, daily administered using needles, insulin pen or insulin pump. However, this method doesn’t maintain normoglycemia and can lead to complications such as limb amputation, blindness, and kidney failure. To avoid such abnormal episodes, scientists imagined smart systems which are able to regulate the glucose level by themselves. During the past decades, a large variety of micro- and nanocarriers have been developed in order to improve efficiency, availability and toxicity profiles of drugs. In this field, stimuli-responsive polymer multilayers have attracted great scientific interest because of their potential applications as controlled delivery or release systems, for chemicals and drugs. A category of stimuli-responsive materials is able to sense glucose and respond to it by a modification of their porosity, leading to a release of insulin. The objective of this work was to investigate the formation of glucose responsive hollow microcapsules (5 microns) made of polyelectrolyte copolymers. These copolymers are composed of carbohydrate-sensitive functions, such as boronic acid and diols (PVOH), known for forming reversible covalent ether bond. In presence of carbohydrates such as glucose, the ether bonds will be reversibly broken and, consequently, the porosity of the glucose particles will change. Therefore, polyelectrolyte copolymers were synthesized by control radical polymerization, i.e. reversible addition-fragmentation chain transfer (RAFT, polyboronic acid) and cobalt-mediated radical polymerization (CMRP, PVOH). Using these polyelectrolytes as polyanions and poly(allylamine) (PAH) as a polycation, we undertook the formation of layer-by-layer capsules starting with a template of CaCO3microparticles which can be dissolved with EDTA leading to the formation of hollow microcapsules. Bovin serum albumin isothiocyanate (BSA-FITC) was used to fill the CaCO3microparticles and to determine the porosity of the resulting capsules in function of the glucose concentration. The sugar-dependent porosity is investigated by following the release of encapsulated BSA-FITC by spectro-fluoroscopy. [less ▲]

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See detailModeling the potential for Eurasian Lynx (Lynx lynx) return in lowland Western Europe
Bouyer, Yaëlle ULg; Poncin, Pascal ULg; Beudels-Jamar, Roseline et al

Poster (2011, December 06)

In the last forty years, tolerance of anthropic environment has allowed large carnivores to recolonize and expand their distribution in Western Europe. To assess the full potential and consequences of ... [more ▼]

In the last forty years, tolerance of anthropic environment has allowed large carnivores to recolonize and expand their distribution in Western Europe. To assess the full potential and consequences of this return, habitat use and landscape modeling are particularly useful tools that allow conservationists to come up with reliable prediction, and policy makers to anticipate management planning. The considerable power of dispersal and important space requirements of these species necessitate large-scale modeling, but it is essential to work in parallel at very fine scale, as carnivores’ impact on human societies is mostly felt at local level. Management of large carnivores must therefore be multi-scalar, with different decisions taken at multiple levels. With the return of the Eurasian Lynx (Lynx lynx) to lowland Western Europe, in regions of relatively high human densities, conservation- planning decisions must be knowledge based. Different approaches will be followed to analyze data at finer and larger scales. These include differential distribution and tolerance of lynx to fragmentation and anthropization, influence of landscape on lynx predation and the development of a conceptual model aiming at responding efficiently to conflicts with human populations. Results will permit the development of a lowland Western Europe habitat model, and to propose conservation measures adapted to the return of this emblematic carnivore. Results will permit the development of a lowland Western Europe habitat model, and to propose conservation measures adapted to the return of this emblematic carnivore. [less ▲]

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