CHARACTERIZATION OF AGRICULTURAL SPRAY BY DIGITAL ANALYSIS OF SHADOWGRAPHY IMAGES

Poster (2013, February 08)

Agricultural sprays are among the most common two-phase flows studied because their characteristics determine the efficiency of treatment as well as environmental contamination. At present, the relevance ... [more ▼]

Agricultural sprays are among the most common two-phase flows studied because their characteristics determine the efficiency of treatment as well as environmental contamination. At present, the relevance of different characterization techniques of the highly polydispersed sprays used in this application remains controversial. Digital analysis of shadowgraphy images presents an attractive option for the characterization of both velocity and size of droplets present in the spray. This study presents an overview of the contrast problems inherent in the use of backlighted images and propose appropriate solution to ensure the quality of measurements. Generally, background light presents heterogeneities associated with light sources and optical arrangement. These can be solved by substracting from each images a composite background. An other particular focus is given to one major drawback of volumetric lighting, the presence of out focus droplets. These droplets have to be removed during the image analysis process because the measurement of their diameters can't be done accuratly. The rejection of these out of focus objects is based on a quantitative parameter which was calibrated with a obliquely shot monodispersed spray. The final step of the image processing is determining velocity of the droplet by tracking a same droplet on two successive images. The tracking algorithm is based on the size of the droplet, its more probable displacement and its direction. [less ▲]

Prebiotic Effects Of Novel Nondigestible Carbohydrates On Bacterial Community In Presence Of S. Typhimurium In An In Vitro System

Poster (2013, February 08)

Evaluation of the volatile emission changes from Arabidopsis thaliana Col-0 in response to temperature stress and Myzus persicae infestation interaction by HS-SPME-GC/MS

Poster (2013, February 08)

Volatile organic compounds (VOCs) are considered to be priming agents in plant responsive defense to protect themselves against abiotic or/and biotic stresses. Such stresses often influence on plant ... [more ▼]

Volatile organic compounds (VOCs) are considered to be priming agents in plant responsive defense to protect themselves against abiotic or/and biotic stresses. Such stresses often influence on plant photosynthesis and defense responses, resulting in a variety of volatile profiles. We investigated how different temperature regimes affect the VOCs emission capacity of Arabidopsis thaliana Col-0 (A.t Col-0) in the presence and absence of a sucking insect – Myzus persicae (green peach aphid). VOCs analyses were made with solid-phase micro-extraction coupled with gas chromatography - mass spectrometry (SPME- GC/MS) under controlled and various stress treatments. In response to temperature stresses, alcohols, ketones, aldehydes and terpenes were the most emitted VOCs. Moreover, the compared results showed that the percent emission of several compounds changed significantly. The interaction between temperature stresses and aphids released some new volatile components; like isothiocynates, esters, sulfur compound and nitrile. Besides, the qualitative and overall proportion of volatile blends differed significantly from plants subjected to the stress treatments within different time intervals (0-24h; 24-48h and 48-72h). Overall, both stress treatments correlated with increased or decreased levels of VOCs classes from Arabidopsis shoot organs. Knowledge of how the temperature – aphids interaction influences on VOCs emission in this study also provides interesting information for evaluating the responsive resistance in plants under natural environments. [less ▲]

What are the main metabolites responsible for the biocontrol potential of Bacillus strains ?

Poster (2013, February 08)

Delayed graft function (DGF) does not harm the results of controlled donation-after-cardiovascular death (DCD) in kidney transplantation.

Poster (2013, February 08)

Occurence and detection of satellite RNAs associated with cucumber mosaic cucumovirus isolated from banana (Musa, AAA genomic) in Ivory Coast

Poster (2013, February 08)

Neanderthals see red : production of red powder in the Late Mousterian in Ormesson, France

Poster (2013, February 07)

Les Bossats, near Ormesson, is a newly discovered late Mousterian site dated around 47.000 B.P. by thermoluminescence. The archaeological level, fossilized by loess, revealed a rich industry based on the ... [more ▼]

Les Bossats, near Ormesson, is a newly discovered late Mousterian site dated around 47.000 B.P. by thermoluminescence. The archaeological level, fossilized by loess, revealed a rich industry based on the discoide mode, associated with numerous fragments of red iron-rich rocks. The geological sources were identified by means of SEM-EDX, XRD, Raman spectroscopy, PIXE and by petrographical observation of thin sections. The past mechanical and morphological modifications of the pigment blocks were characterized by macro-photography, microscopy and topographical micro- measures of the used surfaces. It was thus possible to demonstrate that the colouring materials were selected in the neighbouring by the Neanderthals. Fourteen blocks and fragments show different use wears such as facets, grooves and scars. The Neanderthals implemented numerous techniques in order to produce preferentially red powder. The archaeological remains reveal an organized and versatile processing sequence of red ferruginous materials. During the late Mousterian a great phenomenon in expansion in western Europe is remarkable by the much wider exploitation of mineral red and black materials corresponding to technical modifications and divers utilizations under development. [less ▲]

Prevalentie van eenzaamheid bij 65-plussers in België

Poster (2013, February)

Comparaison of the allergenicity of the zymogen and mature form of Der p 3.

Poster (2013, February)

Whole organ culture in rotating bioreactor: the rat embryonic inner ear

Poster (2013, January 28)

In eutherian mammals, the organ responsible for the transduction of sound waves into nerve impulses is called the organ of Corti. This structure located within the cochlea, a portion of the inner ear, is ... [more ▼]

In eutherian mammals, the organ responsible for the transduction of sound waves into nerve impulses is called the organ of Corti. This structure located within the cochlea, a portion of the inner ear, is composed by two types of cells: sensory hair cells and non-sensory supporting cells. All these cells are distributed according to a specific arrangement along the whole length of the cochlea. So far, the mammalian inner ear is very sensitive to damage, with no hair cell replacement or cell proliferation occurring in the cochlea. That is why understanding the mechanisms that regulate the mammalian cochlear development is important for pursuing strategies to induce sensory hair cells regeneration. Here, we present a technique of whole embryonic inner ear culture in rotating bioreactors. Besides, we compare two different culture media, DMEM and Neurobasal-A. Rat inner ears are sampled at the 16th embryonic day (E16) and grown in rotating bioreactors during 48h or six days. After 48h, semithin sections realized in the growing cochlea show the development of the ventral epithelium and ultrathin sections confirm the differentiation of the sensory hair cells. Using immunochemistry techniques on our material after 48h or six days in vitro, we show that all the cells of the organ of Corti are differentiating, whichever the culture medium used. Our preliminary results demonstrate that organ culture of the embryonic inner ear in rotating bioreactor is possible. Such a method provides an in vitro model for the investigation of developmental, regulatory, and differentiation processes that could be helpful in the understanding of the mechanisms underlying the development of the mammalian cochlea. [less ▲]

In vitro and in vivo Characterization of Adult Bone Marrow Neural Crest Stem Cells and their Implication in Hematopoietic Support

Poster (2013, January 28)

Unravelling the roles of lysine acetylation by Elp3 during inner ear development

Poster (2013, January 28)

The inner ear is composed of the vestibular system that controls balance, and the cochlea, which is dedicated to hearing. In both parts of the inner ear, sensory epithelia comprise supporting cells ... [more ▼]

The inner ear is composed of the vestibular system that controls balance, and the cochlea, which is dedicated to hearing. In both parts of the inner ear, sensory epithelia comprise supporting cells surrounding the sensory hair cells. These cells bear at their apical surface a staircase-structured bundle, consisting of multiple rows of actin-based stereocilia and a single tubulin-based kinocilium. This hair bundle allows the transduction from mechanical stimuli, initiated by sound or gravitational changes, to electrical signals that will then be transmitted by neurons from the spiral ganglion (innervating hair cells of the cochlea) or the vestibular ganglion. The inner ear organogenesis requires a tightly regulated transcriptional program that can be affected by post-transcriptional and post-translational modifications among which lysine acetylation. Given the importance of acetylation homeostasis in controlling developmental processes, we planned to investigate its role in inner ear formation and focused our attention on Elp3 acetyl-transferase, a member of the Elongator complex recently implicated in neurogenesis. To determine the role of Elp3 in the inner ear, we first determine the spatio-temporal pattern of ELp3 mRNA expression and showed that it was expressed in the entire early otocyst at E11.5 and persisted later in the sensory epithelium of the cochlea (the organ of Corti), in the spiral ganglion, in the stria vascularis and in the vestibule. To unravel in vivo functions of Elp3 in the inner ear, we have generated conditional knock-out mice (Elp3 cKO). We submitted these mice to a battery of vestibular testing (i.e. stereotyped circling ambulation, head bobbing, retropulsion, and absence of reaching response in the tail-hanging test) and found significant abnormalities. Besides, compared to wild-type mice, the auditory brain stem response of Elp3 cKO indicated that these mice are severely deaf. At the cellular level, we did not found any structural abnormalities nor cell patterning impairments that could explain deafness or balance dysfunction in Elp3 cKO mice. However, we detected some defaults in the planar orientation of their auditory hair cell bundle. In addition, the length of the kinocilium was significantly reduced both in vestibular and cochlear hair cells from Elp3 cKO mice compared with wild type littermates. We were also able to demonstrate an increased level of apoptosis in the Elp3 cKO spiral ganglion at E14.5 leading to a reduced number of fibers innervating the cochlear hair cells as well as a reduced number of their synaptic ribbons at P0 and P15. In conclusion, our results clearly showed a role of Elp3 both in hearing and balance. We plan to go deeper in the mechanisms involved through the identification of the proteins acetylated by Elp3. [less ▲]

Pharmacological evaluation of succinic acid receptor (SUCNR1) modulators

Poster (2013, January 28)

Simultaneous diagnosis of CLL and CML in a single patient with evidence for two different cell clones

Poster (2013, January 25)

I am (un)happy but I don't know why: Subliminal positive-self statements effects

Poster (2013, January)

This study provides evidence that positive self-statements can increase mood among unhappy people if they are presented subliminally. In study 1, participants with low and high levels of dispositional ... [more ▼]

This study provides evidence that positive self-statements can increase mood among unhappy people if they are presented subliminally. In study 1, participants with low and high levels of dispositional happiness were presented subliminally with the two words I AM which were immediately paired with a positive word. Results revealed that being exposed to subliminal positive self-statements seems to provide a boost in mood for people with less happy dispositions. Surprisingly, opposite effects were found for participants who had joyful dispositions: exposure to subliminal positive self-statements tended to lower their mood. Study 2 confirmed these results with an implicit measure of mood. Such results suggest that subliminal messages can affect emotions and highlight the necessity of taking personality into account in unconscious cognition research. [less ▲]

Validation of a French Version of a New Anxiety Trait Scale for Children

Poster (2013)

Anxiety diagnosis is relatively complex in children because intensity as well as symptoms of anxiety change during childhood (Bouden, Halayem, & Fakhfakh, 2002). The principal aim of this study was to ... [more ▼]

Anxiety diagnosis is relatively complex in children because intensity as well as symptoms of anxiety change during childhood (Bouden, Halayem, & Fakhfakh, 2002). The principal aim of this study was to validate through Confirmatory Factor Analyses (CFA) the a priori three-factor structure of the French version of the anxiety trait scale for children which includes psychological (“tend to be worried about everything”), behavioral (“tend to be upset, nervous or grumbling”), and somatic symptoms (“headache complaints”) of anxiety. This scale was previously found to discriminate, with high sensitivity and specificity, children with anxiety from control group. A first CFA performed on 288 6-12 year-old children showed an acceptable fit (2/df =2.66; RMSEA=.07 and CFI=.94). A second three-factor model was constructed and showed a better fit with a new sample of 287 children (2/df =2.18; RMSEA=.06 and CFI=.96), with a lower ECVI value for the model 2. For this model, the Cronbach’s alpha for each of the subscales ranged from .71 to .86, which confirmed the good internal reliability of the scale. This study provides a new three-factor structure for this anxiety scale and proposes normative data for French-speaking children. [less ▲]

Suivi par diffusion des rayons X aux petits angles de la formation de gels de résorcinol-formaldéhyde

Poster (2013)

Improvement of spray retention on barley leaves by adjuvants

Poster (2013)

Adjuvants contribute to change the types of impact and thus the amount of spray retained by the leaves of the treated plant. We have performed tests of retention on barley plants on BBCH 12 stage and ... [more ▼]

Adjuvants contribute to change the types of impact and thus the amount of spray retained by the leaves of the treated plant. We have performed tests of retention on barley plants on BBCH 12 stage and small pieces of barley leaves at the same stage of growth. Spraying was done in three ways: water without adjuvant, water with Break-Thru® S240 and water with Li700®. The three slurries of fluorescein contained in an amount of 0.2 g / l. Fluorescein retained by the leaves in both cases is then measured by a spectrofluoremeter. The retention tests on whole plants show that it is tripled by the first adjuvant and doubled by the second. On the other side, on small pieces of barley leaves, the amount was increased by the use of surfactants but not to the same extend. This study concluded that the use of adjuvants in spray pesticides increases the amount of retention as a function of leaf area and the type of adjuvant. [less ▲]

Replication Capacity and Susceptibility to Telaprevir of the T54S Resistant Variant is Modulated by Others Hepatitis C Virus NS3 Mutations

Poster (2013)

Which agriculture can face climate change? Focus on varietal adaptation

Poster (2013)

The neural correlates of recollection and familiarity during aging

Poster (2013)

The role of memory traces quality in directed forgetting: A comparison of young and elderly participants using the item procedure

Poster (2013)

Le minerai de fer en Wallonie: une cartographie des gisements

Poster (2013)

The first Upper Paleolithic human remains from Belgium: Aurignacian, Gravettian and Magdalenian fossils at the “troisième caverne” of Goyet

Poster (2013)

Qualité de vie des enfants atteints de mucoviscidose et de leurs parents: Quels sont les prédicteurs?

Poster (2012, December 17)

Introduction. La mucoviscidose est une maladie génétique grave, limitant la durée de vie du patient et entraînant de nombreuses complications. Les progrès scientifiques et médicaux ont conduit à ... [more ▼]

Introduction. La mucoviscidose est une maladie génétique grave, limitant la durée de vie du patient et entraînant de nombreuses complications. Les progrès scientifiques et médicaux ont conduit à l’augmentation de l’espérance de vie, de sorte que l’âge moyen de survie est d’environ 40 ans. Dans ce contexte, la qualité de vie (QV) est devenue un objectif thérapeutique important pour les patients atteints de mucoviscidose. Cependant, malgré un intérêt croissant pour le QV, celle-ci a été sous-investiguée chez les enfants âgés de 6 à 12 ans. Parallèlement, on observe que les professionnels de la santé ne sont plus seuls à intervenir dans la prise en charge du jeune patient. L’essentiel du traitement ayant lieu à la maison, la responsabilité concernant la gestion de la maladie reposent désormais sur les épaules de la famille. Ainsi, les parents d’enfants atteints de mucoviscidose doivent faire face à une variété de stresseurs pouvant entraîner d’importantes implications pour le bien-être psychosocial du système familial. Ces dernières années, le rôle de la famille dans l’adaptation des enfants atteints d’une maladie chronique a reçu une attention particulière. À l’heure actuelle, on reconnaît l’importance et l’influence de la relation parent-enfant dans de multiples aspects du développement social et émotionnel de l’enfant. Cependant, dans les recherches en pédiatrie, les pères sont sous-représentés. C’est principalement la relation mère-enfant malade qui a été pris en considération en ignorant la relation père-enfant malade. Objectifs. Ce projet de thèse s’oriente autour de trois objectifs : (1) étudier l’impact de la mucoviscidose sur la QV et, de manière plus générale, sur l’ajustement de l’enfant et de ses parents ; (2) comprendre le lien entre l’ajustement des parents et celui de l’enfant et identifier les mécanismes spécifiques par lesquels les parents influent sur la QV de l’enfant ; (3) étudier l’effet du genre. Méthodologie. Chaque triade (enfant, père et mère) devra répondre à un ensemble de questionnaire évaluant l’ajustement émotionnel, cognitif et comportemental ainsi que le fonctionnement familial et la qualité de vie. Afin d'isoler la spécificité de la mucoviscidose, trois groupes seront créés : mucoviscidose – asthme – sain. Le début du recrutement est prévu en septembre 2012. Contribution. Cette recherche se veut intégrative et contribuera à mettre en évidence les facteurs prédicteurs de la résilience et des difficultés d’ajustement chez les enfants souffrant de mucoviscidose et leur parent. Les résultats contribueront à l’avancement des connaissances et nous permettraient d’influer sur les initiatives de prévention. [less ▲]

Comparaison de l’analyse de carottes sédimentaires par fluorescence X mobile et par PIXE

Poster (2012, December 11)

Online monitoring of the interaction of balls and slurry with the Sensomag ®

Poster (2012, December 10)

Presentation of Optimag Project results. Optimag aims to optimize the ball milling operations through the use of an embarked sensor, called the Sensomag, and developed by Magotteaux to monitor in real ... [more ▼]

Presentation of Optimag Project results. Optimag aims to optimize the ball milling operations through the use of an embarked sensor, called the Sensomag, and developed by Magotteaux to monitor in real time the position of the slurry and the grinding balls. [less ▲]

Séminaire des chercheurs Télévie 2013

Poster (2012, December 10)

Séminaire des chercheurs Télévie 2013

Characterization of chemotherapy-induced cell death in glioblastoma

Poster (2012, December 10)

Glioblastoma constitute the most frequent and deadliest type of brain tumors. Their annual incidence is estimated between 5 and 8 cases per 100,000 people in Europe and North America. They are resistant ... [more ▼]

Glioblastoma constitute the most frequent and deadliest type of brain tumors. Their annual incidence is estimated between 5 and 8 cases per 100,000 people in Europe and North America. They are resistant to all current therapies and are associated with a very high rate of recurrence. The associated prognosis is generally very poor and most patients die within a year after diagnosis. Unfortunately, despite extensive research and use of multimodality treatments combining surgical resection, chemotherapy and radiotherapy, survival hasn’t really much improved over the last 20 years. Indeed, these tumors were shown to be characterized by a high radio- and chemo-resistance. Glioblastoma cells exhibit overexpression of the anti-apoptotic Bcl-2 family proteins and downregulation of its pro-apoptotic members, high expression of the IAPs (Inhibitors of Apoptosis Proteins) and constitutive activation of the pro-survival NF-κB pathway. Currently, the most commonly used treatment offering the best prognosis to patients consists in a combination of maximal surgical tumor resection (when feasible) with subsequent radio- and/or chemotherapy. Among the most commonly used chemotherapeutic agents, the alkylating agent temozolomide and the topoisomerase I inhibitor camptothecin occupy a central position. Therefore, in this study, the impact of both temozolomide and irinotecan (a soluble derivative of camptothecin) on glioma cell survival will be investigated. Important progress was made in the comprehension of the molecular mechanisms underlying tumor development and progression however, survival benefits conferred by the use of new drugs and therapeutic strategies are counted in months rather than years. Consequently, there is an urge to rapidly improve the efficiency of the currently used treatments. This research project consists in (i) the study of the mechanisms implicated in glioblastoma cell death induced by two chemotherapeutic agents : temozolomide and irinotecan, (ii) the identification of the mechanisms underlying the resistance of glioblastoma to these treatments, (iii) the use of pharmacological tools to interfere with those resistance strategies to enhance chemotherapy efficiency. Necrosis was, until recently, long thought to be only accidental. However, it was shown to be finely regulated by specific signalling pathways. Programmed necrosis often takes place in cells in which apoptosis cannot be properly activated and serves as a back-up cell death pathway. Previous work from our lab having already demonstrated that glioblastoma are, at least partially, apoptosis-defective, special emphasis is put on the study of necrotic parameters. Results from survival tests performed on several glioblastoma cell lines in the presence of necrotic inhibitors like necrostatin-1 (an inhibitor of the central regulator of the necrotic pathway RIP1) allows to partially overcome temozolomide and irinotecan-induced glioblastoma cell death, highlighting the role played by programmed necrosis in chemotherapy sensitivity. [less ▲]

Use of Sheep Ovarian Tissue as a Model to Restore Fertility in Young Cancerous Women

Poster (2012, December 10)

Biorthogonalization Techniques for Least Squares Temporal Difference Learning

Poster (2012, December 07)

We consider Markov reward processes and study OLS-LSTD, a framework for selecting basis functions from a set of candidates to obtain a sparse representation of the value function in the context of least ... [more ▼]

We consider Markov reward processes and study OLS-LSTD, a framework for selecting basis functions from a set of candidates to obtain a sparse representation of the value function in the context of least squares temporal difference learning. To support efficient both updating and downdating operations, OLS-LSTD uses a biorthogonal representation for the selected basis vectors. Empirical comparisons with the recently proposed MP and LARS frameworks for LSTD are made. [less ▲]

Abundance and phenological model of Harmonia axyridis (Coleoptera: Coccinellidae) in field crops

Poster (2012, December 07)

The multicolored Asian ladybeetle Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) was introduced into Western Europe in the late 1990s. This exotic and invasive species is known to thrive ... [more ▼]

The multicolored Asian ladybeetle Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) was introduced into Western Europe in the late 1990s. This exotic and invasive species is known to thrive principally in shrubs and arboreal habitats. We focus on a phonological model and on annual abundance in various field crops. The abundance of H. axyridis adults and larvae were evaluated during a three-year period, from 2009 to 2011, in four important agronomical crops (wheat, corn, broad bean and potato) in Belgium. H. axyridis colonizes and reproduces in all four crops studied, with larger densities observed in corn and broad bean. The reproduction of H. axyridis occurs principally in corn and occurred much less in wheat and potato. From 2009 to 2011, abundances of H. axyridis populations were constant except in corn, where the observed densities of all immature stages and adults were higher in 2011 than in 2009. The population dynamics of aphids and H. axyridis were characterized by a symmetric logistic function (S-shape) based on the cumulative population size. [less ▲]

Breeding sites of main Bluetongue virus vectors in Belgian cowshed

Poster (2012, December 07)

Shoulder injury prevention in sports using 3D motion capture

Poster (2012, December 07)

In sports, where regular and intensive training could progressively lead to traumatic situations, accurate measurement of kinematic parameters can help to predict and anticipate injuries. Overhead ... [more ▼]

In sports, where regular and intensive training could progressively lead to traumatic situations, accurate measurement of kinematic parameters can help to predict and anticipate injuries. Overhead throwing athletes may develop an increased stiffness of the shoulder capsule. The resulting diminution of the gleno-humeral range of motion is usually associated with decreased performance and injury risks. This study illustrates the detection of these situations that put the athlete at risk. [less ▲]

Using a 2D Model of the Io Plasma Torus to Investigate the Effects of Density Variations on the Morphology and Intensity of the Io Footprint

Poster (2012, December 06)

Io is the primary source of plasma in the Jovian magnetosphere, continuously releasing approximately 1 ton/s of SO2 from volcanic eruptions. The interaction of Io with Jupiter’s magnetosphere is strongly ... [more ▼]

Io is the primary source of plasma in the Jovian magnetosphere, continuously releasing approximately 1 ton/s of SO2 from volcanic eruptions. The interaction of Io with Jupiter’s magnetosphere is strongly influenced by the density structure of the resulting plasma torus and the position of Io relative to the center of the torus [Bonfond et al. 2008]. This unusual interaction produces a complex auroral feature on Jupiter’s ionosphere known as the Io footprint. Hubble Space Telescope (HST) observations of Jupiter’s far-UV aurora during spring 2007 showed an increased number of isolated auroral blobs along with a continuous expansion of Jupiter’s main auroral oval over a few months. These blobs were associated with several large injections of hot plasma between 9 and 27 Jovian radii. These events coincided with a large volcanic eruption of the Tvashtar Paterae on Io, as observed by the New Horizons spacecraft [Spencer et al., 2007]. This, in turn, may have resulted in a significant increase in the plasma torus density. Besides, on June 7th, 2007, the Io footprint momentarily became so faint that it disappeared under a diffuse patch of emission remaining from an injection blob [Bonfond et al., 2012]. The goal of the present study is to examine the relationship between the increased density of the plasma torus and the dimming of the Io footprint. We implement a 2D model of the Io plasma torus that treats the variable-density torus as being composed of discrete layers of uniform density. As the co-rotating plasma in the plasma torus impinges on Io, Alfvén waves are launched at a pushback angle obtained from Gurnett and Goertz [1981]. The waves propagate inside the plasma torus through reflection and refraction at density discontinuities where they lose some of their initial energy. Using the above model, we can track the Alfvén wave fronts in the plasma torus and determine the longitude at which they exit the torus along with the corresponding remaining energy. Since Alfvén waves are capable of accelerating charged particles along magnetic field lines, we assume that the discrete Io footprint features are created at these longitudes, and that the intensity of each of these features is positively correlated to the energy transported by the wave front as it exits the plasma torus. Therefore, the model allows us to investigate both the effects of density changes and of Io’s position in the plasma torus on the intensity and the morphology of the Io footprint. In this context, the model enables us to determine the density increase in the plasma torus required to explain the apparent disappearance of Io footprint given its position at that time. [less ▲]

One-way and two-way shape memory study of chemically cross-linked star poly(ε-caprolactone)

Poster (2012, December 03)

Development of Highly Active doped Titania Photocatalysts by Aqueous Sol-Gel Processing

Poster (2012, December)

L'intelligence émotionnelle et l'anxiété chez l'enfant: Quel liens?

Poster (2012, December)

Introduction: The concept of emotional intelligence (EI) is characterized by an individual difference to feel, identify, understand, regulate and use their own emotions and those of others. Several ... [more ▼]

Introduction: The concept of emotional intelligence (EI) is characterized by an individual difference to feel, identify, understand, regulate and use their own emotions and those of others. Several studies show a negative association between EI and various fields such as depression and anxiety. At various times, EI has been described as a protective factor against the development of certain disorders or dysfunctions. However, these studies have often been conducted with an adult population and fewer children. But a child is not a miniature adult, there may be differences between child emotional life and that of an adult. Objectives: This study aims to examine the internal consistency of the short version of the scale and French IE in children. Then, the association between EI and trait anxiety is studied, and the share of explanatory IE in the presence of trait anxiety in children, taking into account the effect of gender. Methods: A sample of 198 Belgian children aged between 9 and 13 years old completed the Trait Emotional Intelligence Questionnaire - Short Form Children (TEIQue - CSF) and the State Trait Anxiety Index for Children (STAIC). Results: We observe a good internal consistency of the French version of TEIQue - CSF (α = .83) and a negative correlation between EI and STAIC (r = - .43). The regression analyzes show that EI significantly explains 18% of the variance STAIC. No gender effect was observed. Discussion: As expected, this study demonstrates a negative association between emotional intelligence of the child and the presence of anxiety symptoms, as well as the lack of gender effect in the scores of EI. We also note that the scores TEIQue - CSF significantly predict the presence of anxiety symptoms in boys as well as girls. This is consistent with other studies in a population of adults or adolescents. [less ▲]

Intraspecific variability of functional traits along a local environmental gradient of water availability in calcareous grasslands

Poster (2012, November 30)

Genetic parameters for individual weights at birth, weaning and 60 days of stress negative Piétrain pigs in the tropics: the case of Vietnam

Poster (2012, November 28)

Data recorded between 2008 and 2012 from Dong Hiep pig farm, Vietnam, was used to stimate genetic parameters for weights at birth (WB), weaning (WW) and 60 days (W60) of stress negative Piétrain pigs ... [more ▼]

Data recorded between 2008 and 2012 from Dong Hiep pig farm, Vietnam, was used to stimate genetic parameters for weights at birth (WB), weaning (WW) and 60 days (W60) of stress negative Piétrain pigs using restricted maximum likelihood methodology. WB, WW and W60 were recorded from 1146, 839 and 610 animals respectively. The data were analyzed according to a mixed model including 4 fixed effects, parity, season, sex, and interaction between halothane genotype and country of origin (Belgium and Vietnam) of sows. Additionally, 3 random effects (maternal common environment for litter, direct and maternal additive genetic) for WB and 2 random effects (maternal common environment for litter and direct additive genetic) for WW and W60 were included in the model. Estimates of direct heritability and proportion of the maternal common environmental variance for WB, WW and W60 were 0.20, 0.13; 0.22, 0.21 and 0.19, 0.30 respectively. In addition, the estimate of maternal heritability for WB was 0.14. These genetic parameters suggest that WB, WW and W60 could be improved by selection using both direct and maternal effects. [less ▲]

A study of Electra posidoniae Gautier (Cheleistomata, Anasca), a bryozoan strictly found as epiphyte of the seagrass Posidonia oceanica (L.) Delile.

Poster (2012, November 26)

Species living as epiphytes of marine macrophytes have often important role in ecosystem functioning, such as food web suppliers. Some animal or algae species may be considered as really specialised in ... [more ▼]

Species living as epiphytes of marine macrophytes have often important role in ecosystem functioning, such as food web suppliers. Some animal or algae species may be considered as really specialised in the colonization of plant substrate and often dominates epiphytic community, particularly, on long life-span seagrass and macroalgae species. Because epiphytic compartment dysfunction is often implied in seagrass human-induced declining, it is important to understand dynamics and life traits of its specific component in pristine area. In our study, colonization dynamics, biomass seasonality, diet composition of Electra posidoniae, an epiphytic bryozoa, strictly found on the leaves of the seagrass Posidonia oceanica and dominating the leaf epifauna, were assessed monthly at 10 metre depth in the Revellata Bay (Corsica, Mediterranean sea). Aiming to delineate their trophic role in the ecosystem, we have performed bulk stable isotopes measurements and gut content analysis. [less ▲]

Postoperative bleeding and autotransfusion

Poster (2012, November 20)

Bleeding in the postoperative period of cardiac surgery is not rare. Mediastinal bleedings could potentially be saved with a cell salvage device. This practice may contribute to decreased allogeneic ... [more ▼]

Bleeding in the postoperative period of cardiac surgery is not rare. Mediastinal bleedings could potentially be saved with a cell salvage device. This practice may contribute to decreased allogeneic transfusion. This study explores the effectiveness of a chest drainage system combined with a cell salvage option during the postoperative period of cardiac surgery in patients at high risk of bleeding [less ▲]

L'éducation du patient à domicile:prémices d'une description par l'alliance du quanti et du quali

Poster (2012, November 20)

Symptoms associated with lumbar instability in athletes with low back pain

Poster (2012, November 17)

Introduction. Low back pain (LBP) is common among athletes and can be challenging for athletic trainers and therapists. Unfortunately, little is known about symptoms associated with functional lumbar ... [more ▼]

Introduction. Low back pain (LBP) is common among athletes and can be challenging for athletic trainers and therapists. Unfortunately, little is known about symptoms associated with functional lumbar segmental instability (FLSI) in athletes with LBP. Purpose. To determine subjective and objective symptoms associated with FLSI in athletes with LBP. Materials and Methods. We included 24 male athletes (12 soccer players and 12 tennis players) with non specific LBP mean (± standard deviation) pain intensity (0-100 Visual Analogue Scale) and disability (0-24 Roland-Disability questionnaire) scores reaching respectively 35 (±20) and 4 (±3). Athletes were submitted to a standardized anamnesis (including subjective identifiers of FLSI) and a clinical assessment conducted by a manual therapist who explored objective identifiers of FLSI. Results. According to the manual therapist, 12 athletes (6 tennis and 6 soccer players) presented a FLSI. The two groups did not differ regarding pain intensity and disability (P>0.05). However, athletes with FLSI appeared significantly younger than non FLSI athletes (P<0.01). Only three subjective identifiers appeared significantly related to FLSI in soccer and tennis players with LBP: “reports frequent episodes of muscle spasms”, “reports feelings of giving way or back giving out” and “Pain increased with sudden, trivial, or mild movements”. Regarding objective identifiers of FLSI, “positive prone instability test”, “aberrant movement during active and passive trunk flexion-extension“ and “poor lumbopelvic control” were significantly related to FLSI in these athletes. Conclusions. In this preliminary study, 50% of the athletes with LBP presented a FLSI. Some subjective and objective symptoms are significantly related to FLSI in soccer and tennis players. Implications. Athletes with LSI should be targeted for retraining to restore normal movement control. [less ▲]

Food-web including Harmonia axyridis Pallas (Coleoptera: Coccinellidae) in field crops

Poster (2012, November 15)

Therapeutic compounds in garlic oil: production and evolution after preparation

Poster (2012, November 15)

Allyl sulfides, the main constituents of garlic oil, have been studied in the past decades for their effects against cancer. Since cancers are not all healed, ways to prevent it, especially with natural ... [more ▼]

Allyl sulfides, the main constituents of garlic oil, have been studied in the past decades for their effects against cancer. Since cancers are not all healed, ways to prevent it, especially with natural products that could be included in food preparation, are more than welcome. The synthesis and separation of allyl sulfides can provide larger amount of allyl sulfide than the extraction in order to make biological tests. Furthermore, the improvement of the synthesis conditions helps the understanding of the formation of allyl sulfide while garlic is processed. Finally, the study of the products allows a deeper understanding of the conversion between the allyl sulfides. A parallel can then be done with the conservation conditions of garlic-based products. The first part of this work describes the synthesis optimization using the design of experiment. The reaction of allyl bromide and sodium disulfide was carried under different conditions: the reaction duration, the heating (in microwave oven or in oil bath, at different temperature), the presence of catalyst, and the agitation were assessed. In the second part of the study, extractions are performed on garlic. The composition of the extracts is followed during time under the conditions established in the first part. The results give an optimized way to synthesize allyl sulfides, as much as an idea of the reactions happening on them in garlic preparations under various conditions. [less ▲]

La signification dans la représentation graphique du projet d'opération urbaine

Poster (2012, November 15)

La signification dans la représentation graphique du projet d'opération urbaine

Utilisation des termites comme source de microorganismes dans la filière de production du bioéthanol de seconde génération

Poster (2012, November 14)

Les termites abritent une microflore symbiotique qui intervient dans la dégradation des fibres constitutives du bois, synthétisant des enzymes capables d’hydrolyser ses composants. Les sucres ... [more ▼]

Les termites abritent une microflore symbiotique qui intervient dans la dégradation des fibres constitutives du bois, synthétisant des enzymes capables d’hydrolyser ses composants. Les sucres fermentescibles libérés suite à cette hydrolyse sont utilisables dans le cadre de la production du bioéthanol de seconde génération. [less ▲]

Viandes bovines à longue durée de conservation conditionnées sous vide : isolement et caractérisation de souches de Carnobacterium

Poster (2012, November 13)

The lactic acid bacteria Carnobacterium divergens and Carnobacterium maltaromaticum are often associated to meat and meat products and may be used as a protective culture, improving the microbial ... [more ▼]

The lactic acid bacteria Carnobacterium divergens and Carnobacterium maltaromaticum are often associated to meat and meat products and may be used as a protective culture, improving the microbial stability and the safety of these products. In this context, the aim of this study was to isolate and characterize Carnobacterium from long shelf-life vacuum-packed beef. LAB counts after culture at +22°C remained below 2.0 log UFC/cm², even at the end of shelf life. On the other hand, the ecosystem evaluation performed by metagenomics revealed the predominance of Carnobacterium and Lactobacillus on the samples. After spreading of a peptone water suspension obtained from the samples on PCA, pure isolates were collected and identified by API 50 CHL galleries. Seventy-eight % of isolates were C. maltaromaticum, 3 % C. divergens and 19 % could not be identified. The next step of this work will consist in performing a genotypic and functional characterization of these Carnobacterium isolates. [less ▲]

Improved in vitro gas fermentation method to assess prebiotic potential of indigestible carbohydrates

Poster (2012, November 09)