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See detailEvaluation du risque de toxicite de pesticides vis-a-vis de trois insectes auxiliaires (Adalia bipunctata, Aphidius rhopalosiphi et Episyrphus balteatus) par le dosage chimique des residus.
Copin, A.; Latteur, G.; Deleu, R. et al

Book published by Ministere des Classes Moyennes et de l'Agriculture, Service Information - Bibliotheque (2001)

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See detailEvaluation du rôle préventif des oestroprogestatifs et des thérapeutiques non hormonales dans le cadre de l'ostéoporose postménopausique
Reginster, Jean-Yves ULg

in Journal de Gynécologie, Obstétrique et Biologie de la Reproduction (1996), 25(7), 677-83

Osteoporosis is a medical, social and economical problem for developed countries. Prevention remains the only realistic approach to reduce the burden related to this disorder. Primary prevention of ... [more ▼]

Osteoporosis is a medical, social and economical problem for developed countries. Prevention remains the only realistic approach to reduce the burden related to this disorder. Primary prevention of osteoporosis is based on efforts to reach a maximal peak bone mass at the end of the growth period and, subsequently, at the time of menopause. No pharmacological intervention is considered at this stage. Biologically, hormone replacement therapy induces a correction of the biochemical changes observed in markers of bone remodeling at the time of the menopause. A systematic screening of asymptomatic postmenopausal women followed by the induction of hormonal replacement therapy in high risk subjects appears to be an interesting cost/benefit strategy in terms of reasonable attribution of health resources. Nasal administration of calcitonin fully prevents the trabecular bone loss observed during the first years of menopause. Notwithstanding, the exact dose of nasal calcitonin able to prevent bone loss remains to be fully elucidated. Bisphosphonates inhibit bone resorption. Tiludronate prevents trabecular postmenopausal bone loss. The use of selectif estrogen receptor modulators is based on a possible differential action of these molecules, at the level of the estrogenic receptors, depending of the tissue considered. Several direct inhibitors of osteoclastic resorption are also under development. Their main target is either to prevent the linkage of osteoclasts to the bone matrix or to prevent the acidification of bone matrix required to induce the resorption process. [less ▲]

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See detailEvaluation du stade évolutif de la démence par la Clinical Dementia Rating-Modified (CDR-M)
Ylieff, Michel ULg; Di Notte, David; Missotten, Pierre ULg et al

Poster (2006, September)

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See detailL'évaluation du statut socio-économique dans la recherche pédagogique
de Landsheere, Gilbert ULg

in Education : tribune libre d'information et de discussion pédagogiques (1964), 85

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See detailEvaluation du stress chez le cheval
Peeters, Marie ULg

Scientific conference (2011, March 04)

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See detailEvaluation du succès de restaurations de pelouses calcicoles de la vallée du Viroin : densité en individus et succès reproducteur de deux espèces cibles.
Harzé, Mélanie ULg

Master's dissertation (2010)

Calcareous grasslands are local biodiversity « hotspots ». Unfortunately, these exceptional ecosystems have undergone a drastic fragmentation since the abandonment of traditional agro pastoral practices ... [more ▼]

Calcareous grasslands are local biodiversity « hotspots ». Unfortunately, these exceptional ecosystems have undergone a drastic fragmentation since the abandonment of traditional agro pastoral practices. Consequently, many calcareous grassland species are now in danger. In Belgium, since 1990, many hectares of these habitats have been restored to reassemble remaining fragments of calcareous grasslands. The main goal of this work is to participate at the scientific evaluation of calcareous grasslands restoration which took place in the Viroin valley (Namur, Belgium). To reach this goal, information about global and local densities of 2 grasslands species (Helianthemum nummularium and Sanguisorba minor) have been collected on 6 working zones (2 reference grasslands, 2 restored in 1990 and 2 restored in 2006) situated on 2 different sites. Reproductive success traits have been measured on 120 individual samples of each species. Moreover, individuals’ size parameters and some environmental data (soil depth and vegetation structure) have been collected. Results show that global and local densities are lower on recently restored grasslands for both species studied. On the other hand, older restorations and reference grasslands are not significantly different. With regards to the reproductive success of species, individuals on grasslands restored in 2006 have the best results. They produce more flowers, or inflorescences, and more seeds. Differences observed for individuals’ reproductive success have their more probable cause in vegetation structure. The vegetation in the zones that have been restored more recently is more open as the shrubs and trees layer is lower. [less ▲]

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See detailEvaluation du système de financement des journées hospitalières en fonction des pathologies
Fecher-Bourgeois, Fabienne ULg; Gillet, Pierre ULg

in Bulletin des Résumés d'Informations Hospitalières / Ministère des affaires sociales, de la santé publique et de l'environnement (1999), 16(Janvier/février/mars 1999),

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See detailL’évaluation du système de formation L’évaluation de la formation professionnelle en Europe ; observations à partir de quelques pays européens
Husson, Jean-François ULg

in Pauliat, Hélène (Ed.) La formation en Europe : entre performance et concurrence ? (2010)

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See detailL’évaluation du système de formation
Husson, Jean-François ULg

Conference (2007, November 16)

This contribution was an overview of various evaluation schemes regarding training in various European countires (mainly Britain, The Netherlands and Belgium).

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See detailEvaluation du temps de mélange à partir de la distribution temporelle du libre parcours dans une salle
Billon, Alexis ULg; Dirix, Simon; Embrechts, Jean-Jacques ULg

in Actes du 10ème Congrès Français d'Acoustique (2010, April)

Dans un espace clos où se mélangent les nombreuses ondes réfléchies, diffusées et diffractées par les surfaces, la propagation de l’énergie sonore peut être décomposée en deux étapes: tout d’abord, un ... [more ▼]

Dans un espace clos où se mélangent les nombreuses ondes réfléchies, diffusées et diffractées par les surfaces, la propagation de l’énergie sonore peut être décomposée en deux étapes: tout d’abord, un processus déterministe pour lequel il est possible d’identifier individuellement chaque contribution, suivi d’un processus stochastique pour lequel les contributions doivent être globalisées et vues comme un processus quasi-aléatoire. Le seuil de transition entre les deux comportements est matérialisé dans l’échogramme par le temps de mélange. Dans cette étude, le temps de mélange est analysé en regard de la distribution temporelle du libre parcours. Celle-ci est obtenue numériquement à l’aide du programme de tir de rayons large bande Salrev. Dans un premier temps, le mélange est identifié au travers du caractère asymptotique de cette distribution. Le temps de mélange est alors défini comme la durée (mesurée à partir de l’instant d’émission au départ de la source) nécessaire pour atteindre ce comportement asymptotique. A partir de cette définition du temps de mélange sont étudiées les influences de divers paramètres géométriques et acoustiques. Ensuite, trois applications pour des salles de concert sont réalisées. Cette étude montre que les valeurs obtenues pour le temps de mélange convergent vers celles observées expérimentalement, à condition que les parois de la salle soient suffisamment diffusantes. [less ▲]

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See detailEvaluation du troisième Programme de Gestion Durable de l'Azote en agriculture. Recommandations en matière de règlementations et de recherches scientifiques
Vandenberghe, Christophe ULg; Destain, Jean-Pierre ULg; Beckers, Yves ULg et al

in Vandenberghe, Christophe; Colinet, Gilles; Destain, Jean-Pierre (Eds.) et al 2ème Atelier Nitrate - Eau. Evaluation du Programme de Gestion Durable de l'Azote (2013)

In accordance with the Nitrates Directive, the third “Durable Nitrogen Management Plan” (PGDA) will be soon reviewed in Wallonia (Belgium). The second “Nitrate – Water” workshop took place between 28th ... [more ▼]

In accordance with the Nitrates Directive, the third “Durable Nitrogen Management Plan” (PGDA) will be soon reviewed in Wallonia (Belgium). The second “Nitrate – Water” workshop took place between 28th May and 1st June 2012. The workshop was attended by both Belgian scientists (Université catholique de Louvain - UCL, Walloon Agricultural Research Center CRA-W, Université de Liège - ULg, Gembloux Agro-Bio Tech) and French scientists (National Institute for Agricultural Research - INRA). In the light of the results of experiments presented by scientists at this workshop, modifications to the PGDA are now recommended. These concern organic and mineral nitrogen fertilization for crops and meadows; catch crops; soil nitrate-nitrogen residue limitation in autumn, at the start of the nitrate leaching period; the management of meadow ploughing and a modification of the dairy cow standard for nitrogen production. [less ▲]

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See detailEvaluation échocardiographique de la fonction cardiaque chez le cheval en coliques
Borde, Laura ULg

Doctoral thesis (2013)

Endotoxemia is a common complication of colic in adult horses and its outcome is mainly related to cardiovascular status. Endotoxic shock, like septic shock, involves hypovolemic, cardiogenic and ... [more ▼]

Endotoxemia is a common complication of colic in adult horses and its outcome is mainly related to cardiovascular status. Endotoxic shock, like septic shock, involves hypovolemic, cardiogenic and distributive components leading to tissue hypoperfusion with a high risk for multiple organ failure and an elevated mortality rate in equine and human intensive care units. Via the release of pro-inflammatory mediators, endotoxins induce a fall in systemic vascular resistance (SVR) and a drop of cardiac output (CO) resulting both from reduction in venous return and myocardial depression. First, CO is preserved thanks to a compensatory vasoconstriction and an increase in heart rate (HR), myocardial contractility and venous return. However, a loss of vascular responsiveness to catecholamines and a myocardial depression finally result in a drop of CO and SVR with a progressive hypotension despite a persistent tachycardia. The time point during the course of septic shock when hemodynamic monitoring is used has been proven to influence outcome, allowing early goal-directed therapy in humans. Unfortunately, hemodynamic monitoring in conscious horses is often limited due to animal size, working conditions and lack of patient cooperation. Therefore, such as in human patients, echocardiography could provide useful non invasive information about stroke volume (SV) and CO, systolic and diastolic function as well as fluid status. In human septic shock patients, this technique has emphasised a myocardial depression with both diastolic and systolic dysfunction reversible in survivors. Previous studies in horses focused on quantitative evaluation of hemodynamic parameters after an experimental endotoxin challenge. However, LV function had not been reported in naturally-occurring endotoxemia in horses. The purpose of the first prospective study was to assess the impact of clinically-occuring endotoxic shock on echocardiographic indices of LV systolic function in horses. Fifty horses admitted in clinic on emergency for colic were submitted to an echocardiographic exam on admission. A shock score from 1 to 4 was established for each horse based on clinical evaluation, non invasive systolic blood pressure and blood tests measurements. LV echocardiographic parameters were compared between the 4 groups according to the shock score (SS) (SS1: no or discrete signs of shock, n=11; SS2 : mild, n=17; SS3: moderate, n=12; SS4: severe, n=10) using a multivariable analysis. Significance was set at p < 0.05. Stroke volume, stroke index (SI), ejection time (ET), ejection time index corrected for HR (ETI), aortic velocity time integral (AoVTI), aortic flow acceleration time (TTP) and deceleration time (DTAo) were significantly lower, whereas aortic flow acceleration rate (dv/dtAo) was significantly higher in shocked horses than in SS1. CO was not significantly different between groups. Even if those results were difficult to interpret because of the shock-induced changes in loading conditions of the heart, they suggested that alterations in some indicators of systolic function can be quantified by Doppler echocardiography in horses with colic-induced endotoxemic shock. The aim of the second study was to non invasively assess the impact of colic-related endotoxic shock on equine diastolic cardiac function. Sixty-eight horses admitted in clinic on emergency with colic were included in this study. A similar SS was established for each horse. LV echocardiographic parameters were compared between the 4 groups according to the SS (SS1 n=14; SS2 n=16; SS3 n=27; SS4 n=12) using a multivariable analysis. Significance was set at p < 0.05. Deceleration rate of peak early LV filling velocity, peak late LV filling velocity and E/Em (peak early LV filling velocity (E) to peak early myocardial velocity (Em) ratio) were significantly higher whereas time to Em onset was significantly lower in high shock score groups compared with horses with no or mild signs of shock. The results of this second study could suggest a diastolic dysfunction with a rise of LV filling pressure ocurring with endotoxic shock in horses. Since E/Em has shown to be a very reliable predictor of mortality in human with septic shock, the results of this second study warranted further investigations. To assess the prognostic value of echocardiographic parameters of LV function in horses with endotoxic shock, 41 horses admitted for colic with clinical evidence of systemic inflammatory response syndrome associated to hyperlactatemia or hypotension underwent echocardiographic examination on admission. LV echocardiographic parameters were compared between nonsurvivors (n=29) and horses that survived to discharge (n=12). With comparable heart rate and LV preload estimate, LV SV, AoVTI, DTAo, ET and ETI of aortic flow and Em were lower in the nonsurviving than in the surviving horses while pre-ejection period to ejection time ratio (PEP/ET) of Doppler aortic flow and E/Em ratio were higher (p<0.05). A cut-off value of 0.26 for PEP/ET predicted mortality with 100% sensitivity and 42% specificity (area under the receiver operating characteristic curve (AUC): 0.71), whereas a cut-off value of 2.67 for E/Em predicted mortality with 100% sensitivity and 83% specificity (AUC: 0.89). The results of this third study suggested that echocardiography may provide prognostic information in colic horses with clinical evidence of endotoxic shock. Especially, PEP/ET and E/Em could be useful markers of systolic and diastolic dysfunction, respectively, to detect horses with a high risk of death requiring more intensive cardiovascular monitoring as it has been reported in human patients with septic shock. Finally, to assess LV function after preload restoration in colic horses, 5 horses were followed echocardiographically from admission to at least 24 hours after colic surgery in a preliminary study. Systolic dysfunction was detected in 4/5 horses and diastolic dysfunction assumed in 2/5 horses and suspected in the 3 other horses during hospitalisation. Moreover, echocardiography provided useful diagnosis informations about hemodynamic and fluid status suggesting that ultrasonographic monitoring of cardiovascular function could be of interest in equine intensive care. 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See detailL'évaluation écologique des démences
Meulemans, Thierry ULg

in Eustache, Francis (Ed.) Neuropsychologie clinique des démences: Evaluations et prises en charge (1995)

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