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See detailAquapôle, Cellule Latitudes Sud : Coopération avec les pays du Sud dans le domaine de l’eau
Deliège, Jean-François ULg; Detienne, Xavier; Grard, Aline ULg et al

Poster (2011, January)

L’objectif de la Cellule Latitudes Sud au sein de l'Aquapôle de l'Université de Liège est de favoriser le développement de projets liés à l’eau dans les pays du Sud, et en particulier dans les pays en ... [more ▼]

L’objectif de la Cellule Latitudes Sud au sein de l'Aquapôle de l'Université de Liège est de favoriser le développement de projets liés à l’eau dans les pays du Sud, et en particulier dans les pays en développement. La Cellule Latitudes Sud intervient au niveau de la promotion, la réalisation et/ou la collaboration à différents projets avec une approche pluridisciplinaire et plurisectorielle. Elle s’appuie sur les compétences de l’Aquapôle (ULg) et également sur le réseau de compétences que constituent ses services membres. [less ▲]

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See detailPyridine Derivatives of Nimesulide as New Promising Anti-inflammatory Agents
Renard, Jean-François ULg; Lecomte, Frédéric ULg; de Leval, Xavier et al

Poster (2011, January)

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See detailLa thérapie institutionnelle est-elle efficace ?
Triffaux, Jean-Marc ULg

Poster (2011, January)

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See detailCapacité à ressentir la durée du temps : instauration d'une sémiologie développementale en milieu écologique chez des enfants de 2,5 à 12 ans
SCHOLL, Jean-Marc ULg

Poster (2011, January)

Introduction : Comment le clinicien peut-il préciser la sémiologie de « la perception de l'écoulement du temps » chez l'enfant dans son contexte écologique ? En psychologie clinique la perception du temps ... [more ▼]

Introduction : Comment le clinicien peut-il préciser la sémiologie de « la perception de l'écoulement du temps » chez l'enfant dans son contexte écologique ? En psychologie clinique la perception du temps est souvent abordée à partir des repères séquentiels et des capacités rythmiques mais la sémiologie de « la capacité à ressentir la durée du temps » manque de références développementales. Objectif : instaurer « une sémiologie développementale » de « la perception de l'écoulement du temps » chez des enfants typiques, et rechercher des indices sémiologiques de trajectoires développementales atypiques. Hypothèses cliniques : 1) la « capacité à ressentir l'écoulement du temps » a une réalité clinique déterminable par des « indices sémiologiques » au sein de la réalité écologique d'enfants typiques de 2,5 à 12 ans en population générale, 2) une population d'enfants atypiques présente une clinique et un cours développemental différents. Méthodologie : Un « questionnaire d'anamnèse sémiologique » à remplir par les parents a été développé à partir des observations cliniques des chercheurs. 25 questions approchent une « sémiologie écologique » des attitudes de l'enfant pouvant être liées à la perception du temps. Il a été appliqué dans 2 populations d'enfants de 2,5 à 12 ans : 827 enfants typiques en population générale et 297 enfants atypiques consultant des services de suivis psychologiques ambulatoires (S.S.M) (échantillon transnosographique). Des analyses développementales portent sur 4 populations: garçons typiques, filles typiques, garçons atypiques, filles atypiques. Chaque question est considérée comme une variable ordinale à 5 modalités (échelle de Likert). L'analyse (programme Statistica) procède par régression logistique multinomiale de chaque variable en fonction de l'âge et de deux variables explicatives nominales : enfants atypiques et sexe ; les interactions atypique/sexe/âge sont ensuite analysées. Résultats : les questions sont catégorisées selon: 1) La présence d'une évolution développementale (19 variables/25); 2) Une discrimination de la population atypique (12 variables/25 dont 6 variables ont une évolution développementale spécifique aux atypiques), ce qui constitue un questionnaire de dépistage; 3) Une différenciation sexuée (2 variables sur 25). [less ▲]

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See detailPerception de l'écoulement du temps : une sémiologie développementale de 2,5 à 12 ans, population générale versus atypique
SCHOLL, Jean-Marc ULg; PHILIPPE, Paule ULg

Poster (2011, January)

Introduction : En clinique, la perception du temps chez l'enfant est surtout considérée à partir du temps séquentiel mais il y a une quasi-absence de prise en compte de repères sémiologiques de sa ... [more ▼]

Introduction : En clinique, la perception du temps chez l'enfant est surtout considérée à partir du temps séquentiel mais il y a une quasi-absence de prise en compte de repères sémiologiques de sa capacité d'appréhender la durée du temps. Objectif : Développer une sémiologie développementale de « la perception de l'écoulement du temps » en situation écologique. Méthode : Élaboration d'un « questionnaire sémiologique » de la « capacité à ressentir la durée du temps » à remplir par les parents (échelle de Likert) ; recrutement de 2 échantillons d'enfants de 2,5 à 12 ans : 827 enfants typiques en population générale et 297 enfants atypiques consultant des services de suivis psychologiques ambulatoires (S.S.M.) (échantillon transnosographique) ; régression logistique multinomiale de chaque item en fonction de l'âge et de 2 variables explicatives nominales : population atypique et sexe. Résultats : 19 questions/25 ont une évolution développementale ; 2 questions une différence sexuée ; 12 questions/25 différencient la population atypique. Ces 12 questions permettent de relever une sémiologie cliniquement pertinente qui approche la « capacité de ressentir la durée du temps » en milieu écologique ; en voici quelques exemples : - Quand l’enfant est ailleurs (par exemple à l’école ou à la garde d’une personne), il répète souvent la question de savoir quand on viendra le rechercher bien qu’on lui ait déjà souvent répondu ou qu’il en ait déjà souvent fait l’expérience ? - A-t-il toujours besoin de savoir comment va se dérouler sa journée ? - Lorsqu’une activité est prévue, répète-t-il souvent la question de savoir quand elle aura lieu alors qu’on lui a déjà répondu ? - Votre enfant est-il souvent en retard (et pour cela il faut souvent lui rappeler l'heure)? - Quand votre enfant est occupé à une activité, a-t-il tendance à être surpris quand arrive la fin du temps qui était prévu pour celle-ci (comme s’il n’avait pas anticipé que le temps approche de la fin) ? - Spontanément, sans avoir besoin de regarder l’heure, votre enfant « sent-il » qu’une activité en cours approche de l’heure où on va devoir l’arrêter ? (par exemple, spontanément il ressent l’approche de la fin de l’heure de piscine ; il interrompt à temps son jeu pour aller regarder son émission favorite à la TV). [less ▲]

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See detailDiagnostic différentiel ADHD / Bipolarité par une étude de l'évolution développementale de la sémiologie enfants - adultes
SCHOLL, Jean-Marc ULg; PHILIPPE, Paule ULg

Poster (2011, January)

Introduction : La prévalence du Trouble de l'attention avec ou sans hyperactivité (ADHD, TDA/H) est de 3 à 5 % pour les enfants et de 1,9 à 7,3 % pour les adultes dans différentes pays (Kessler et al ... [more ▼]

Introduction : La prévalence du Trouble de l'attention avec ou sans hyperactivité (ADHD, TDA/H) est de 3 à 5 % pour les enfants et de 1,9 à 7,3 % pour les adultes dans différentes pays (Kessler et al., 2006; Fayyad et al., 2007). Le Trouble bipolaire a une prévalence chez l'adulte de 1 % pour le type I et de 4,4 % pour le spectre bipolaire (Merikangas et al., 2007), chez l'adolescent elle est évaluée à 1 % pour le type I et le spectre bipolaire en population juvénile à 6 % (2 à 15) (Benazzi, 2007). Des controverses demeurent quant au recouvrement de ces différentes entités cliniques selon les âges. Gabrielle Carlson a décrit chez l'enfant un tableau bipolaire comportant des symptômes maniaques continus et chroniques avec des symptômes d'ADHD. Ainsi, le « National Institutes of Health (NIH) » a distingué cette forme continue du trouble dans l'enfance, le « severe mood dysregulation », du trouble bipolaire de type I de l'adolescent, le « narrow phenotype » comportant des épisodes thymiques et davantage de symptômes psychotiques. Dans une population d'enfants maniaques bipolaires les études rapportent 57 à 98 % d'ADHD en comorbidité. Par contre, dans une population d'enfants ADHD, la comorbidité avec les états bipolaires est de 11 à 22 % (Angold et al., 1999 ; Carlson, 1998 ; Singh et al., 2006). Objectif : Affiner « une sémiologie développementale » et le diagnostic différentiel ADHD/Bipolarité Méthode : Étude qualitative avec observation et « anamnèse sémiologique » détaillée d'un maximum de micro-signes ; échantillons: 14 enfants (5 à 10 ans) et 7 adultes (20 à 37 ans) avec ADHD seul et 170 enfants (2 à 10 ans) et 55 adultes (19 à 61 ans) avec des caractéristiques bipolaires (selon le DSM IV). Résultat : Proposition d'un "tempérament maniaque bipolaire simple" en 7 axes sémiologiques : 1. forme super-énergétique, 2. clinique du sommeil, 3. "mal-être en situation d'être seul", 4. labilité émotionnelle, 5. excitabilité-désinhibitions, 6. prépondérance de l'attention divergente sur l'attention convergente, 7. tendance à l'hyperactivité. L'ADHD ne comporte que 1, 6 et 7. Réf.: « Bipolarité et ADHD. Recherche sémiologique : continuum développemental de la petite enfance à l'âge adulte et diagnostic différentiel », La Psychiatrie de l'enfant, vol. 55/2012, in press. [less ▲]

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See detaildoes neoadjuvant radiotherapy promote tumor dissemination ,
Leroi, Natacha ULg; boujouf, Sarah; COUCKE, Philippe ULg et al

Poster (2011, January)

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See detailHow asteroseismology can help to precisely constrain properties of planet-host stars
Salmon, Sébastien ULg; Montalban Iglesias, Josefa ULg; Lanotte, Audrey ULg et al

Poster (2011, January)

Nowadays more than 500 exoplanets have been discovered, mainly studied by radial velocity and transit measurements. Precise knowledge on their characteristics is crucial to develop theories of planetary ... [more ▼]

Nowadays more than 500 exoplanets have been discovered, mainly studied by radial velocity and transit measurements. Precise knowledge on their characteristics is crucial to develop theories of planetary formation and evolution. In that aim, not only star and planet(s) masses but also the evolutionary stage of systems are needed. From radial velocity measurements one has to assume the inclination and the stellar mass of the system to disentangle the mass of the planet. When transit is observable, one can measure the ratio of planetary and stellar radii. Finally, the degree of evolution of the system is determined by the one of the star. Thus the host star must be well known to obtain a full set of system properties. However, determination of stellar parameters such as the mass, radius and its evolution from classical observables (Teff, log g, [Fe/H]) suffers of large uncertainties. This is particularly true for dwarf stars on the Main Sequence. Fortunately we can obtain better constrains with the help of asteroseismology. That latter approach probes the stellar properties through observation of oscillations present in stars. With the launches of high-precision photometry space missions, CoRoT and Kepler, we are now able to detect oscillations in a huge number of stars. In particular Kepler photometry, primarily intended to detect transits of planet, can give accurate stellar parameters of planetary systems as it also affords to make [less ▲]

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See detailMiR-146a an angiostatic miRNA elevated in peripartum cardiomyopathy
Halkein, Julie ULg; Castermans, Karolien; Malvaux, Ludovic et al

Poster (2011, January)

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See detailThe Cenomanian marine reorganization
Fischer, Valentin ULg

Poster (2011, January)

The middle Cretaceous is usually associated with numerous climatic and oceanic perturbations, and a minor to intermediate extinction event at the Cenomanian-Turonian (CTB) boundary. Amongst marine ... [more ▼]

The middle Cretaceous is usually associated with numerous climatic and oceanic perturbations, and a minor to intermediate extinction event at the Cenomanian-Turonian (CTB) boundary. Amongst marine vertebrate palaeontologists, the CTB is mostly known as the extinction of the last ichthyosaurs (Reptilia), after a long period of decline (e.g. Bardet, 1992; Bardet, 1994; Sander, 2000; Lingham-Soliar, 2003). However, new data from France, Canada and Russia indicates that the diversity of late Early Cretaceous ichthyosaurs was far higher than previously thought, both in terms of taxonomical and ecological diversity, but the Cenomanian ichthyosaur diversity remains extremely low. This suggests that the ichthyosaur extinction is far more severe than initially thought and took place during the whole duration of the Cenomanian, in a diachronic fashion. Additionally, a compilation of the current data on the diversity of other marine vertebrates groups shows that the Cenomanian is a peculiar stage within the Cretaceous, with the radiation burst of marine squamates, such as dolichosaurs and mosasauroids (Bardet et al., 2007; Bardet et al., 2008), as well as chondrichtyans, polycotylid plesiosaurs and teleost fishes (e.g. Cumbaa et al., 2010; Schultze et al., 2010). This profound reorganisation of the marine ecosystems (coeval with the onset of the “Chalk sea”) was probably driven by external, physical factors given the diversity of biotic responses. The numerous potential causes for that major reorganisation renders the identification of its precise mechanisms difficult. [less ▲]

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See detailSémiologie des troubles de l'attention : attention convergente et attention divergente, continuum développemental de la petite enfance à l'âge adulte.
SCHOLL, Jean-Marc ULg; PHILIPPE, Paule ULg

Poster (2011, January)

Introduction : Le « Trouble de l'attention avec ou sans hyperactivité » (ADHD ou TDA/H) connu chez l'enfant, demeure une clinique peu identifiée à l'âge adulte alors qu'elle persiste dans 50 % des cas ... [more ▼]

Introduction : Le « Trouble de l'attention avec ou sans hyperactivité » (ADHD ou TDA/H) connu chez l'enfant, demeure une clinique peu identifiée à l'âge adulte alors qu'elle persiste dans 50 % des cas (Faraone et al., 2006) ; plus précisément, l'étude de l'évolution comparative des symptômes entre 6 ans et 20 ans révèle que l'hyperactivité diminue de 50 %, l'impulsivité de 40 % et l'inattention ne diminue que de 20 % (Mick et al., 2004). La sémiologie des troubles de l'attention est particulièrement méconnue chez l'adulte, or, elle peut interférer avec le pronostic socio-affectif de la personne (Bange, dans Revol & Brun, 2010). Dans le DSM IV-TR le trouble de l'attention isolé nécessite la présence de 6 des 9 critères d'inattention mentionnés. La littérature évoque aussi une distinction sémiologique en formes « d'attention convergente » et « d'attention divergente » ; ce vocable médical est plus global que celui de la neuropsychologie mais possède un substrat neurophysiologique qu'un traitement spécifique de l'E.E.G. permet de mesurer sur l'ensemble du cortex cérébral par les degrés respectifs d'utilisation de processus convergents et divergents lors de tâches en cours (Arns et al., 2009 ; Van den Bergh, 2003 ; van Dongen-Boomsma et al., 2010). Objectif : Affiner la sémiologie des troubles de l'attention tant chez l'enfant que chez l'adulte. Méthode : 1) une revue de la littérature et 2) une étude d'observation qualitative fine avec une « anamnèse sémiologique » détaillée d'un maximum de micro-signes sémiologiques porte sur 14 enfants, âgés de 5 ans 3 mois à 10 ans 7 mois, et 7 adultes de 20 ans à 37 ans présentant un diagnostic de trouble de l'attention (selon le DSM IV). Résultat : Deux tableaux, selon qu'il y a une prépondérance de « l'attention convergente » ou de « l'attention divergente », donnent un descriptif détaillé de la sémiologie. Ces tableaux sont différenciés chez l'enfant et chez l'adulte ; ils permettent d'établir un continuum développemental de la clinique. Réf. : « Bipolarité et ADHD. Recherche sémiologique : continuum développemental de la petite enfance à l'âge adulte et diagnostic différentiel », La psychiatrie de l'enfant, vol. 55/2012, in press. [less ▲]

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See detailConstruction and validation of a new perceptual priming task: The contrasted word task
Geurten, Marie ULg; Meulemans, Thierry ULg

Poster (2011)

In clinical neuropsychology, different rehabilitation techniques – e.g., vanishing cues, spaced retrieval, errorless learning – developed for patients with memory impairments are considered to make use of ... [more ▼]

In clinical neuropsychology, different rehabilitation techniques – e.g., vanishing cues, spaced retrieval, errorless learning – developed for patients with memory impairments are considered to make use of the preserved implicit memory abilities shown by these patients, and notably the perceptual priming effects (Harrison et al., 2007). It might be therefore important for clinician neuropsychologists to determine whether these abilities are preserved or not in their patients. However, and quite surprisingly, assessment tools aimed at assessing implicit memory abilities in brain damaged patients are lacking. The aim of this study was to build and validate a new perceptual priming task – the contrasted word task – which could be used by neuropsychologists in their clinical practice. Seventy-two young healthy participants were included in this study, and were administered the contrasted word task in which 60 words counterbalanced in 2 orders and 3 types of priming (Visual; Auditory; New) emerged gradually from a white background on a computer screen. Subjects were asked to press the response key when they thought they had recognized the word. Results show a perceptual priming effect which is specific to the exposure modality (i.e., no inter-modality transfer), proving the efficacy of the contrasted word task to highlight a facilitated identification for words that were shown previously, and confirming the perceptual specificity of the priming effect (Schacter, 1992). [less ▲]

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See detailThe influence of affective valence on DRM false memories in younger and older adults
Dehon, Hedwige ULg; Laroi, Frank; Van der Linden, Martial

Poster (2011)

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See detailOptimization of a formic/acetic acid treatment of beech wood (Fagus sylvatica L.) for delignification
Simon, Mathilde ULg; Richel, Aurore ULg; Vanderghem, Caroline ULg et al

Poster (2011)

Lignin is a promising molecule constituting a renewable alternative to some petrochemical industry products. Lignin is an aromatic cross-linked heteropolymer composed of three phenylpropanoids (p ... [more ▼]

Lignin is a promising molecule constituting a renewable alternative to some petrochemical industry products. Lignin is an aromatic cross-linked heteropolymer composed of three phenylpropanoids (p-hydroxyphenyl, guaiacyl and syringyl units) linked together via radical coupling reactions by specific ether or carbon-carbon bonds. With this phenylpropanoid structure, lignin is a rich resource of biobased products that could find high-valued applications in a lot of different areas like petrochemical polymer reinforcement and replacement, antioxidants, stabilizers, resins and vanillin production... The first challenge of the valorization of lignins is their extraction from raw materials. Lignins can be found in different lignocellulosic substrates like grasses, softwood and hardwood. This extraction process needs the development of suitable biomass treatments, allowing efficient lignin recuperation without degradation. This one could lead to the loss of some interesting properties and so of some valorization possibilities. In this study, beech wood (Fagus sylvatica L.) was collected in the region of Gaume (Belgium). Beech wood particles were delignified at atmospheric pressure by a mixture of formic acid/acetic acid/water. A central composite design and response surface methodology were used for the optimization of treatment parameters for delignification. The optima of two independent variables, namely time (1h30, 3h, 4h30) and temperature (87°C, 97°C, 107°C), were determined on delignification yield, pulp yield, concentration of degradation products (furfural and hydroxymethylfurfural). Moreover, the impact of these two variables on the amount of residual linkages between phenylpropanoid units was evaluated by semi-quantitative bidimensional nuclear magnetic resonance spectroscopy (NMR-HSQC). Our results highlight that the delignification yields increase when cooking time and temperature are elevated. Nevertheless, under these conditions, pulp yield decreases as hydrolysis of hemicelluloses and cellulose occurs. The hydrolysates of carbohydrates (free sugars or oligosaccharides) are contained in the black liquor. At elevated temperature and time, the amount of degradation products in the black liquor is increased. [less ▲]

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See detailTowards laser cooling of Iron Atoms
Huet, Nicolas ULg; Krins, Stéphanie ULg; Bastin, Thierry ULg

Poster (2011)

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See detailPoultry supply chains and demand analysis for poultry meat in the context of HPAI in Hanoi, North-Vietnam
Vu Dinh, Ton; Phan Dang, Thang; Nguyen Tuan, Son et al

Poster (2011)

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See detailLa cartographie des forêts anciennes en Wallonie
Kervyn, Thierry; Branquart, Etienne; Dufrêne, Marc ULg

Poster (2011)

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See detailSélection et traitement thermique de matériaux colorants rouges sur le site moustérien es-Skhul (ca. 100 000 B.P., Israël)
Salomon, Hélène ULg; Vignaud, Colette; d'Errico, Francesco et al

Poster (2011)

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See detailL'origine des hématites oolithiques exploitées durant la Préhistoire récente. Objectifs et méthodes d'un PCR
BILLARD, Cyrille; SAVARY; GOEMAERE, Eric et al

Poster (2011)

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See detailDevelopment of a LC-UV-MS analytical method for malondialdehyde.
Douny, Caroline ULg; Dure, Remy; Brose, François ULg et al

Poster (2011)

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See detailNanobodies as structural probes to investigate the mechanism of fibril formation by the amyloidogenic variants of human lysozyme
Dumont, Janice ULg; Pardon, Els; Aumont-Nicaise, Magalie et al

Poster (2011)

Six variants of human lysozyme (single-point mutations I56T, F57I, W64R, D67H and double mutations F57I/T70N, W112R/T70N) are associated with a hereditary non-neuropathic systemic amyloidose. These ... [more ▼]

Six variants of human lysozyme (single-point mutations I56T, F57I, W64R, D67H and double mutations F57I/T70N, W112R/T70N) are associated with a hereditary non-neuropathic systemic amyloidose. These proteins form extracellular amyloid fibrils that deposit in a wide range of tissues and organs such as liver, spleen and kidneys where they cause damages [1]. It was shown that the D67H and I56T mutations cause a loss in stability and more particularly a loss of global cooperativity of protein [1]. 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. We have also shown that the binding of three variable domain of camelid antibodies or (VHHs) - raised against the wild type human lysozyme inhibit in vitro the formation of amyloid fibrils by the lysozyme variants. These three VHHs bind on different regions of lysozyme and act as amyloid fibrils inhibitor through different mechanisms [2, 3, and unpublished results]. In the present work, sixteen new VHHs specific of human lysozyme have been generated. Competition experiments have shown that they bind to five non overlapping epitopes. We have demonstrated that five of these new VHHs are able to bind lysozyme in conditions used for amyloid fibril formation, and interestingly two of them recognize two epitopes that are different from those of the three VHHs previously characterized [2, 3, and unpublished results]. The effects of these new VHHs on the properties of lysozyme variants such as activity, stability, cooperativity and aggregation will be discussed. [less ▲]

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See detailInfection néonatale tardive : Méningite à Streptocoque Agalactiae chez un nouveau-né de 19 jours.
Bequet, Emeline ULg; Guffens, Anne; Defontaine, Elizabeth et al

Poster (2011)

Les infections à Streptocoques du groupe B (SGB ou Streptococcus Agalactiae) sont, dans 80% des cas, précoces (< 7jours de vie) et, dans 20% des cas, tardives (> 7 jours de vie). Dans cette seconde ... [more ▼]

Les infections à Streptocoques du groupe B (SGB ou Streptococcus Agalactiae) sont, dans 80% des cas, précoces (< 7jours de vie) et, dans 20% des cas, tardives (> 7 jours de vie). Dans cette seconde catégorie, 35% des infections sont des méningites et engendrent une morbidité importante chez l’enfant. Nous présentons le cas d’un garçon de 19 jours, né à terme par césarienne, ayant développé une méningite à Streptocoques B, avec un dépistage maternel négatif. A l’admission, l’enfant est septique. Un bilan complet met en évidence une méningite à Streptocoque Agalactiae. Une antibiothérapie empirique à base d’Ampicilline 200mg/kg/j, Céfotaxime 100mg/kg/j et Amikacine 15mg/kg/j est initiée. Ce traitement est maintenu 5 jours ; ensuite, poursuite du Céfotaxime en monothérapie pour une durée totale de 14 jours. Les complications précoces (présentes dans 62% des cas) ne sont pas mises en évidence par les différentes explorations réalisées : mesure du périmètre crânien ; échographie transfontanellaire à la recherche d’une hydrocéphalie ou d’abcès cérébraux ; électroencéphalogramme pour exclure des phénomènes paroxystiques. A moyen et long terme, une surveillance clinique, iconographique, ophtalmologique et de l’audiogramme devra être faite afin d’exclure un retard développemental, des troubles sensoriels ainsi qu’une hydrocéphalie, une encéphalomalacie, une atrophie cérébrale ou une porencéphalie. L’incidence des infections précoces à streptocoques B a pu être réduite grâce au dépistage maternel anténatal et à une antibioprophylaxie en cas de positivité du test. Cependant, l’administration perpartale systématique d’antibiotiques ne permet pas de diminuer le nombre et la gravité des infections tardives, la contamination étant, dans ces cas, essentiellement horizontale. Le taux de complications à 5 ans des méningites à SGB est estimé à 49%, ce qui justifie, chez ces enfants, un suivi neuropédiatrique et sensoriel à long terme. [less ▲]

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See detailModernization of demand analysis for poultry meat in the context of HPAI in Hanoi, North-Vietnam
Phan Dang, Thang; Nguyen Tuan, Son; Bui Huu, Doan et al

Poster (2011)

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See detailExpansion of the Magdalenian in Northwest Europe
Miller, Rebecca ULg; Noiret, Pierre ULg

Poster (2011)

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See detailResting-state fMRI activity in tinnitus
Maudoux, Audrey ULg

Poster (2011)

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See detailA chaque abeille son stérol et ses fleurs
Vanderplanck, Maryse ULg; Lognay, Georges ULg

Poster (2011)

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See detailMorphology of the suspensory ligament (interosseous muscle III) of the horse
Shikh Al Sook, Mohamad Khir ULg; Espinosa, Jennifer; Piret, Joëlle ULg et al

Poster (2011)

Introduction: The injuries of the suspensory ligament (SL) are important causes of lameness and financial losses in the equine industry. Ultrasound examination permitted to visualize some parts of the SL ... [more ▼]

Introduction: The injuries of the suspensory ligament (SL) are important causes of lameness and financial losses in the equine industry. Ultrasound examination permitted to visualize some parts of the SL. The significance of “abnormal” findings is however not sufficiently known. Until now, few studies described the relationship between the ultrasonographic appearance and the exact morphology in histological sections. The aim of this study is to develop good techniques for cutting and staining the SL and to improve knowledge about the normal morphology of the SL. Methods: In this study, the SL of eight <sound> horses were collected. The body of the SL was divided in 3 thirds and sampling was realised within each third and between the thirds. The samples were embedded in paraffin or in Tissue-Tek for cryosections. The sections were stained with hematoxylin/eosin or Masson's trichrome. For 3 SL, ultrasounds were performed before sampling. The digital tip was maintained in physiological position owing to a press. Results: Most of the paraffin sections were shredded because of the hardness of the tissue. Cryosection revealed a better preservation of tissues. Only some freezing artifacts (holes) appeared on a few sections. Muscles fibers surrounded by adipose tissue containing blood vessels were present mainly in the proximal and medium third of the SL whereas they were not found in the distal third. The remaining structure look like a tendon and was composed of collagen fibers, stained in green with the Masson's trichrome coloration. Conclusions: This study permitted to develop cutting and staining techniques for the SL and helped to map the adipose, muscular and tendinous parts within the SL. It lays down the bases of subsequent studies that will concern ultrasonographically examined digital tips of sound and pathological horses of different breeds and ages. [less ▲]

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See detailA Chandra search for low-mass companions of late B-stars in Tr16
Evans, N. R.; DeGioia-Eastwood, K.; Gagné, M. et al

Poster (2011)

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See detailPostglacial pioneer settlement in the Sarvinki area, Eastern Finland : a red ochre grave in Rahakangas 1 site
Simponen, Laija; Mannermaa, Kristiina; Taipale, Noora ULg et al

Poster (2011)

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See detailIs there really an Azores diversity enigma? Insights from the phylogeography of the heather Erica scoparia s.l.
Desamore, Aurélie ULg

Poster (2011)

The Azorean flora, in contrast to that of other archipelagos, is characterized by a paucity of evolutionary radiations and the widespread distribution of most endemics. Several hypotheses, including ... [more ▼]

The Azorean flora, in contrast to that of other archipelagos, is characterized by a paucity of evolutionary radiations and the widespread distribution of most endemics. Several hypotheses, including isolation from the continent, recent age, ecological homogeneity, and limited paleoclimatic variations, have been proposed to account for this pattern. These hypotheses are tested here within the context of the molecular phylogeography of the heather Erica scoparia s.l., a Mediterraneo-Atlantic species complex distributed across Macaronesia, North Africa and southwestern Europe. The marked molecular radiation of this species in the Azores, including an array of single-island endemics, suggests that the apparent homogeneity of the Azorean flora might, in fact, conceal undetected patterns of endemism that are similar to those observed in the Canarian flora for morphological data. Haplotype richness was higher in the Azores than in the Canaries and extensive dispersal mediated allopatry is apparent at the molecular level. The Azores were colonized at least twice independently by E. scoparia, whereas the Canarian haplotypes are monophyletic, suggesting that the greater distance between the Azores and the continent does not necessarily hamper the chances of successful colonization. [less ▲]

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See detailCompelling untruths: the effect of aging on vivid false memories and memory editing
Dehon, Hedwige ULg; Lampinen, James Michael

Poster (2011)

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See detailMassive non-thermal radio emitters: new data and their modelling
Volpi, D.; Blomme, R.; De Becker, Michaël ULg et al

Poster (2011)

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See detailEffects of environmental factors on yield and milking number in dairy cows milked by an automatic system located in pasture
Dufrasne, Isabelle ULg; Robaye, Vincent ULg; Knapp, Emilie ULg et al

Poster (2011)

Nowadays, farmers have to manage larger herds but want, at the same time, benefit from a normal social life. The milking robot can bring solutions. Its use can reduce physical labour and allow flexibility ... [more ▼]

Nowadays, farmers have to manage larger herds but want, at the same time, benefit from a normal social life. The milking robot can bring solutions. Its use can reduce physical labour and allow flexibility. This technology results in a reduction in grazing even through grazing appears as a natural practice which is appreciated by the consumers. This project aims to develop strategies to use milking robots in pasture in order to benefit from advantages regarding feeding costs as well as animal welfare and health. It aims to study the effects of grass height, animal, days in milk, rotation cycle number and distance from grazed paddocks on daily milk yield and milking number of grazed cows. [less ▲]

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See detailControl of Polymyxa betae by Bacillus amyloliquefaciens lipopeptides
Desoignies, N.; Schramme, F.; Ongena, Marc ULg et al

Poster (2011)

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See detailImpact of the treatment conditions of a formic/acetic acid delignification method on chemical structure and antioxidant activity of beech wood lignin
Simon, Mathilde ULg; Vanderghem, Caroline ULg; Richel, Aurore ULg et al

Poster (2011)

The interest in lignocellulosic substrates is increasing because they are clearly identified for their high potential of development in energy and value-added molecules production. Indeed lignocellulosic ... [more ▼]

The interest in lignocellulosic substrates is increasing because they are clearly identified for their high potential of development in energy and value-added molecules production. Indeed lignocellulosic biomass constitutes a promising resource for a sustainable production of organic compounds and biobased products that could progressively replace molecules from the petrochemical industry. Until now lignocellulosic substrates were mainly used for the valorization of cellulose. Hemicelluloses and lignins were less valorized and often degraded after the process. However, due to their phenolic structure, lignins can be valorized in a lot of high-valued applications like vanillin production, replacement of petrochemical polymers, antioxidants for cosmetics and food industry, resins… In this study, a representative sample of beech wood (Fagus sylvatica L.) was collected in the region of Gaume in Belgium. Beech wood was delignified at atmospheric pressure by an organosolv process using a mixture of formic acid/acetic acid/water. The effect of cooking time and temperature was evaluated on the structure, physico-chemical properties and antioxidant activity of the lignins obtained from the black liquor after treatments. The structural and physico-chemical characteristics of the lignins were investigated with different tools like infrared spectrometry, thermogravimetric analysis, gel permeation chromatography after acetylation of lignins, NMR 1H, 13C and HSQC. The antioxidant activity was assessed by a spectrophotometric method using the α,α-diphenyl-β-picrylhydrazyl radical (DPPH). [less ▲]

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See detailBiophysical studies of trigger factors adapted to extreme biological temperatures
Struvay, Caroline; Piette, Florence; Feller, Georges ULg

Poster (2011)

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See detailDark matter in a SUSY left-right theory
Vicente, Avelino ULg

Poster (2011)

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See detailProspective Person Memory and Retrospective Person Memory for Age Progressed Images
Lampinen, James Michael; Dehon, Hedwige ULg; Miller, Justin T.

Poster (2011)

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See detailInvasive Evaluation of Coronary Arteries with Intermediate Stenosis at Coronary CT Angiography: Prevalence of Significant Findings
GHEKIERE, O.; DEWILDE, W; COOLEN, T et al

Poster (2011)

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See detailAdenylation domain specificity in pyoverdine NRPS biosynthesis
Vanvlassenbroeck, Aurélien; Leclère, Valérie; Pupin, Maude et al

Poster (2011)

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See detailBone regeneration using porous titanium particles vs. bovine hydroxyapatite: a sinus lift study in rabbits
LAMBERT, France ULg; LECLOUX, Geoffrey ULg; Léonard, Angélique ULg et al

Poster (2011)

Background: The use of porous titanium particles as space filling biomaterials for intraoral bone regeneration might be of interest because of both the mechanical stability and nonresorbable properties ... [more ▼]

Background: The use of porous titanium particles as space filling biomaterials for intraoral bone regeneration might be of interest because of both the mechanical stability and nonresorbable properties. Titanium particles were recently described for bone regeneration in sinus lifts and in the treatment of periimplantitis. Nevertheless, tissue integration and 3D bone regeneration with titanium particles were poorly explored in these previous reports. Aim: The first objective of this study was to qualitatively and quantitatively assess the bone formation process, particularly the long-term behavior and 3D volume stability of subsinusal bone regeneration, using titanium or bovine hydroxyapatite granules, in a rabbit model. The second objective was to evaluate the effect of the hydration of the BHA particles with a therapeutic concentration of doxycycline solution on the osteogenesis and biomaterial resorption. Methods: Rabbits underwent a double sinus lift procedure using one of three materials: grade 1 porous titanium particles (Ti), bovine hydroxyapatite (BHA) or chemically modified bovine hydroxyapatite (BHATTC). Animals were sacrificed after 1 week, 5 weeks or 6 months. Samples were analyzed using mCT and nondecalcified histology. Results: The materials used in each of the three groups allowed an optimal bone formation; bone quantities and densities were not statistically different between the three groups. At 6 months, more stable 3D volume stability was found with TI and BHATTC (P¼0.0033). At 5 weeks and 6 months, bone to material contact (BMC) corroborating osteoconduction was significantly higher with BHA and BHATTC than with Ti (P < 0.0001). Conclusions and clinical implications: Even though the studied biomaterials displayed different architectures, they are relevant candidates for sinus lift bone augmentation before dental implants because they allow adequate 3D stability and osteogenesis. However, to recommend the clinical use of Ti, both an observation on the drilling effects of Ti particles and clinical trials are needed. [less ▲]

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See detailProduction, extraction et concentration en continu de biosurfactants produit par B. subtilis en bioréacteur à membrane
Coutte, F.; Lecouturier, D.; Leclere, V. et al

Poster (2011)

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See detailDescription of the bone-remodeling pattern after socket preservation procedures in human: a methodological study
LAMBERT, France ULg; VINCENT, Kim ULg; VANHOUTTE, Vanessa ULg et al

Poster (2011)

Background: The bone remodeling after tooth extraction can result in the loss of as much as 50% of the buccal wall and a global crestal reduction in width of 3.87mm according to a recent systematic review ... [more ▼]

Background: The bone remodeling after tooth extraction can result in the loss of as much as 50% of the buccal wall and a global crestal reduction in width of 3.87mm according to a recent systematic review. Multiple surgical protocols using biomaterials are proposed in order to limit the typical postextraction bone resorption. However, because of the heterogeneity of the studies and, more specifically, of the assessment methods, it is difficult to assert the superiority of one technique over another. Aim: The objective of this study was to develop a new radiographic method to assess alveolar bone remodeling after socket preservation procedures. Methods: Sixteen extraction sites (in 14 patients) localized in the upper anterior maxilla were treated with bovine hydroxyapatite (0.25–1mm particles) and a saddled connective tissue graft. A radiographic 3-dimensional assessment of the hard tissues was performed at baseline and at 3 months after the procedure. Standardized horizontal measurements were taken at three corono apical levels ( 2, 5, and 9mm) and at three mesio-diatal level (Mesial, Center, and Distal) in the buccal and palatal aspects. Vertical measurements were also recorded in nine regions over the top of the alveolar crest. Results: Extraction socket-preservation technique assessed in the present study significantly reduced horizontal bone remodeling. The horizontal dimension of the crest decreased by 1.6mm (20%) in the cervical regions ( 2mm level), experienced a moderate decrease of 1mm (12%) at the 5mm level, and experienced a very low decrease of 0.5mm(6%) in the apical ( 8mm) level. The losses were always significantly higher in the buccal than in the palatal aspect. Buccally, the maximal bone remodeling at the cervical level remained below 1mm. Vertical bone resorption was homogeneous and was < 1mm in the nine measured regions. Conclusions and clinical implications: The radiographic measuring methodology proved to be accurate and reproducible. It can be applied in other clinical settings. Moreover, the surgical procedure evaluated in the present study, significantly limits the postextraction buccal bone remodeling compared with the data found in the literature for untreated extraction socket in the aesthetic area. However, a complete inhibition of the bone remodeling was not reached and the authors suggest a surgical technique using a ‘‘saddled’’ connective tissue graft to thicken buccal soft tissue biotype and consequently compensate for cervical bone loss. [less ▲]

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See detailHighly efficient organic/inorganic titania xerogels for photocatalysis applications
Bodson, Céline ULg; Bied, Catherine; Páez Martínez, Carlos ULg et al

Poster (2011)

TiO2 heterogeneous photocatalysis is an attractive technique for the complete destruction of undesirable contaminants either in aqueous or gaseous phase by using solar or artificial light illumination ... [more ▼]

TiO2 heterogeneous photocatalysis is an attractive technique for the complete destruction of undesirable contaminants either in aqueous or gaseous phase by using solar or artificial light illumination. The main drawback of TiO2 is that it can be activated only by UV light because of its large band gap (3.20 eV for anatase). Thus, it would be interesting to sensitize TiO2 to the whole visible region by doping with non-metal atoms such as phosphorus. Furthermore, it was found that the P-doped species could significantly increase the specific surface area of the materials, which consequently exhibit a higher content of surface hydroxyl groups. Upon band gap excitation of TiO2, the photoinduced electrons and positively charged holes can reduce and oxidize the species adsorbed on the TiO2 particles. The high degree of recombination between photogenerated electrons and holes is a major rate-limiting factor controlling the photocatalytic efficiency. Attempts to increase the titania efficiency have been made by doping P-doped TiO2 with metals, such as Ag. In the present study, a sol-gel method is developed to synthesize P-doped TiO2 and P/Ag-codoped xerogels by a cogelation method [1] based on the hydrolysis and the condensation of Ti(OC3H7)4 in the presence of a phosphoryled compound able to complex silver: NH2-(CH2)2-NH-(CH2)2-P(O)-(OC2H5)2, EDAP), in various alcohols. These xerogels are dried at 150°C under vacuum for 24 h, and calcined under air for 5 h at 350°C, 450°C, 550°C and 650°C. The resulting materials were characterized by ICP-AES, TG-DSC, TEM, XRD, nitrogen adsorption-desorption isotherms, FT-IR and diffuse reflectance measurements in the UV/Vis region. To measure the photoactivity of these new hybrid organic/inorganic titania xerogels, all these samples were tested for the degradation of p-nitrophenol under visible light. The titanium, phosphorus and silver contents in xerogels were confirmed by ICP-AES. As expected, theoretical and actual Ti/P molar ratio and Ag contents in xerogels are similar and then after washing with THF for 48 h. These results allow to conclude that EDAP and Ag are well incorporated within the TiO2 matrix: EDAP is anchored in the titania matrix by complexation and cogelation with TTIP [2], whereas silver, first incorporated by complexation through the ethylenediamine fragment of EDAP, is present in the xerogels in the form of nanoparticles. It was found that the phosphor-doped species could significantly increase the surface area of the materials. [2] It is noteworthy that the porosity of these materials is not affected by the addition of silver acetate during the synthesis, a very slight decrease of the specific surface area being observed in all cases. The organic/inorganic hybrid titania materials display very high photocatalytic efficiencies in the degradation of p-nitrophenol compared to pure titania. Deeper investigations concerning the structure of these materials should enable a better understanding of the photocatalytic mechanisms involved with these hybrids and will soon be reported. 1. S. Lambert, K. Y. Tran, G. Arrachart, F. Noville, C. Henrist, C. Bied, J. J. E. Moreau, M. Wong Chi Man, B. Heinrichs, Micropor. Mesopor. Mater. 2008, 115, 609. 2. C.J.Bodson1, S.D. Lambert1, C. Alié1, X. Cattoën2, J-P. Pirard1, C. Bied2, M.Wong Chi Man2, B. Heinrichs1 ,Micropor. Mesopor. Mater. 2010, 134,157 [less ▲]

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See detailBioinformatics tools to decrypt pyoverdine biosynthesis in Pseudomonas sp.
Vanvlassenbroeck, Aurélien; Leclère, Valérie; Pupin, Maude et al

Poster (2011)

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See detailPostglacial pioneer settlement in the Sarvinki area, Eastern Finland : environmental and economical setting
Pesonen, Petro; Hertell, Esa; Mannermaa, Kristiina et al

Poster (2011)

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See detailAn investigation of the relationships between foot conformation and distal interphalangeal joint effusion in young warmblood horses at the beginning of their training
Cubeddu, Francesca; Bastianacci, Valentina; Verwilghen, Denis et al

Poster (2011)

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See detailSynthesis of amonabactins by Aeromonas hydrophila : implication of NRPS of a unique iterate-alternative type
Leclère, Valérie; Subashkumar, Rathinasamy; Wathelet, Bernard ULg et al

Poster (2011)

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See detailPilot Trials of STAR Target to Range Glycemic Control
Penning, Sophie ULg; Le Compte, Aaron; Massion, Paul et al

Poster (2011)

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See detailSynthesis of amonabactins by Aeromonas hydrophila : implication of NRPS of a unique iterative-alternative type
Leclère, Valérie; Rathisamy, Subashkumar; Wathelet, Bernard ULg et al

Poster (2011)

Detailed reference viewed: 28 (3 ULg)
See detailEffect of Chronic confinement stress on growth, survival, blood cortisol and glucose of perch (Perca fluviatilis)
Rougeot, Carole ULg; Tomson, Thomas; Vandecan, Michaël et al

Poster (2011)

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See detailThe promotive impact of high temperature on flowering in root chicory (Cichorium intybus L.)
Mathieu, Anne-Sophie; Vandoorne, Bertrand; Quinet, Muriel et al

Poster (2011)

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See detailDETERMINATION OF TRIFLURALIN RESIDUES IN CULTURED CATFISH AND WATER.
Nguyen Quoc, Thinh; Tran Minh, Phu; Do Thi Thanh, Huong et al

Poster (2011)

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See detailUne thérapie destinée aux patients schizophrènes - Self-Awareness Therapy (SAT): Résultats préliminaires
Boulanger, Marie ULg; Pauly, Marc; Nachtergael, Hilde et al

Poster (2011)

Objective: Autonoetic awareness enables to mentally relive personal events in memory to be aware of one’s own experiences across subjective time and so to have a feeling of individuality and self ... [more ▼]

Objective: Autonoetic awareness enables to mentally relive personal events in memory to be aware of one’s own experiences across subjective time and so to have a feeling of individuality and self-direction. It is intimately associated with our awareness of ourselves as persons with a past and a future. Autonoetic awareness thereof contributes to construction of our identity by the recovery of past events, particularly specific events, and the imagination of future events. According to Danion’s theoretical model (2001), autonoetic awareness impairment is at the heart of schizophrenia. This deficit should depend on defective associations between separate aspects of the events during the recall and therefore, it is associated with a reduction in accessing specific information in autobiographical memory (AM). This impairment should explain identity perturbation, cognitive deficits, negative and positive symptomatology present in schizophrenia. Supporting this model, the present study evaluates the effect of a cognitive and behavioural intervention called Self-Awareness Therapy (SAT) on autonoetic awareness, AM and the capacity to imagine oneself in the future, in schizophrenia patients. Method: Fifteen patients with schizophrenia participated to SAT and, 8 patients took part in the Integrative Program Therapy (IPT) of Brenner. Before and after therapy, patients were asked to complete questionnaires to evaluate the autonoetic awareness, AM, projection into the future as well as affective and symptomatology scales. Results: For SAT, the participants reported more specific past and future events after than before the remediation therapy. Furthermore, patients reported significantly less depressive and anxiety symptoms as well as less negative symptoms after compared before the SAT. For IPT, no significant differences emerged. Discussion: These results are in line with previous study (Blairy et al., 2008) and support the notion that, in schizophrenia the retrieving of past specifics memories and projection into the future can be improved. La conscience autonoétique (CA) nous permet de revivre mentalement des évènements personnellement vécus, d’en prendre conscience à travers un temps subjectif et de ressentir un sentiment d’individualité. Elle contribue à la construction de notre identité via la récupération d’évènements passés, particulièrement les évènements spécifiques, et l’imagination d’évènements futurs. Selon le modèle de Danion (2001), une perturbation au niveau de la CA serait au cœur de la schizophrénie. Celle-ci résulterait d’un relâchement des associations entre les différents éléments d’un évènement lors du rappel et dés lors, serait associée à une réduction de l’accès aux informations spécifiques en mémoire autobiographique. Cette perturbation pourrait expliquer les troubles de l’identité, les déficits cognitifs ainsi que la symptomatologie présents dans la schizophrénie. Afin de remédier à ces déficits, nous avons élaboré une intervention cognitive et comportementale, destinée à des patients schizophrènes, qui s’appuie sur ce modèle. Cette étude présente les résultats préliminaires de la SAT en la comparant au 1er module du programme IPT. [less ▲]

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See detailPeriodic bursts of non-Io DAM and its relationship to Jovian aurora phenomena
Rucker, H.; Panchenko, M.; Grodent, Denis ULg et al

Poster (2011)

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See detailAntibiotic Producing Bacteria : Researches and Perspectives
Tenconi, Elodie ULg

Poster (2011)

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See detailSelf-DNA release mediates the adjuvant effects of aluminum salts
Marichal, Thomas ULg; Ohata, K; Bedoret, Denis et al

Poster (2011)

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See detailUsing putative anti-auxins to improve somatic embryo maturation of Abies nordmanniana
Tahiri, Abdelghani ULg; Misson, Jean-Pierre; Kevers, Claire et al

Poster (2011)

In Belgium, the culture of Nordmann fir (Abies nordmanniana) is mainly located in Wallonia region. The planted area is estimated in average at 5000 ha  that annualy produce some 4 million Christmas trees ... [more ▼]

In Belgium, the culture of Nordmann fir (Abies nordmanniana) is mainly located in Wallonia region. The planted area is estimated in average at 5000 ha  that annualy produce some 4 million Christmas trees destined in priority to the export market. In vitro propagation by somatic embryogenesis is considered as an alternative method to seedlings for producing homogeneous and orthotropic trees on a large scale. Currently, the performances of the somatic embryo (SE) maturation is still insufficient to consider any commercial application of the technology. In this way , the effect of three substances  (2,3,5-triiodobenzoïque acid  as TIBA, 2 - (p-chlorophenoxy)-2-methylpropionic acids as PCIB, p-hydroxbenzoïque as PHBA)  reported as ''anti-auxins'' have been tested with three embryogenic lines on the formation and maturation of normal somatic embryos. [less ▲]

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