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See detailLes effets de la Révolution sur l'architecture liégeoise
Gilles, Isabelle ULiege

Scientific conference (2014, January 21)

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See detailEffets de la sénescence sur les neurones GABAergiques
Delwaide, P. J.; Delwaide, Jean ULiege

in Encéphale (L') (1987), 13

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See detailEffets de la substitution du tourteau d’arachide par la fève de coton conventionnel en production de poulet de chair au Sénégal
Diaw, Mamadou Tandiang; Dieng, Abdoulaye; Mergeai, Guy ULiege et al

in Tropicultura (2010), 28(3), 139-147

A study has been conducted on 400 chicks to evaluate conventional cottonseed kernels on broilers production. Groundnut cake has been substituted by cottonseed kernels at 0, 25, 50 and 75% levels ... [more ▼]

A study has been conducted on 400 chicks to evaluate conventional cottonseed kernels on broilers production. Groundnut cake has been substituted by cottonseed kernels at 0, 25, 50 and 75% levels. Cottonseed kernel incorporation decreased significantly (p< 0.001) the growing parameters, feed intake, feed efficiency and nutrients digestibility of the experimental diets. This reduction was proportional to the level of substitution. The study suggests that only the level of gossypol in cottonseed kernels limits their incorporation in broilers diets and that this by-product should be excluded from the formulation in broilers production or that its level of incorporation should be limited to a maximal level of 10% when production duration is not a constraint for breeders. [less ▲]

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See detaileffets de la substitution totale du tourteau d’arachide par la fève de coton glandless sur les performances zootechniques de poulets de chair au sénégal
Diaw, Mamadou; Dieng, Abdoulaye; Mergeai, Guy ULiege et al

in Revue d'Elévage et de Médecine Vétérinaire des Pays Tropicaux (2012), 65(1-2), 17-23

The performances of broilers fed a diet in which the groundnut cake was totally replaced by glandless cottonseed kernels (FCG) were compared to those of animals fed an experimental control diet (Tém_E), a ... [more ▼]

The performances of broilers fed a diet in which the groundnut cake was totally replaced by glandless cottonseed kernels (FCG) were compared to those of animals fed an experimental control diet (Tém_E), a commercial diet (Tém_C), and a very simple diet containing only corn, FCG and a mineral and vitamin concentrate. From the start, the Tém_C and FCG animals showed the highest growths. After 43 days of breeding, there were major differences in body weights between the groups, essentially caused by differences in feed intake, so that the best growth rates were not necessarily linked to better feed conversion ratios. Low body weights, low intakes and high mortality levels were observed with the simple diet. [less ▲]

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See detailEffets de la surface disponible et du type de sol sur les émissions gazeuses lors de l’élevage de truies gestantes
Philippe, François-Xavier ULiege; Cabaraux, Jean-François ULiege; Canart, Bernard et al

in 42èmes Journées de la Recherche Porcine (2010)

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See detailEffets de la variation de pression sur la qualité des jets de pulvérisation et leur contribution aux risques de pollution environnementale.
Boukhalfa, Hassina dite Hafida ULiege

Conference (2011, November 16)

Un traitement phytosanitaire s’effectue en visant un triple objectif: être efficace, ne pas mettre en danger l’opérateur et protéger l’environnement. (MOREAU et al., 1997). La quantité de pesticides ... [more ▼]

Un traitement phytosanitaire s’effectue en visant un triple objectif: être efficace, ne pas mettre en danger l’opérateur et protéger l’environnement. (MOREAU et al., 1997). La quantité de pesticides appliquée chaque année est estimée à 2.5 millions de tonnes mais la part de cette quantité qui entre en contact avec les organismes indésirables est très faible. La plupart des chercheurs l’évaluent à moins de 1% (ELAISSAOUI et al., 2004), ce qui veut dire que 99% des substances chimiques entre en contact avec le milieu environnant d’une manière non ciblé et sont potentiellement dangereux pour les écosystèmes entiers. D'après FAGOT et LARRAT (2002), la pression a un effet direct sur la répartition du produit et le volume de bouillie appliqué par son action sur la taille des gouttelettes et sur l'angle du jet de pulvérisation. Dans le but d’accroître l’efficacité de pulvérisation de pesticides et de réduire les pertes diverses de bouillie qui en résultent, nous avons étudie l’influence de la variation de pression sur la forme et la composition d’un jet de pulvérisation à l’aide d’un pulvérisateur à pression de liquide à jet projeté avec une buse à turbulence. Le travail a été effectue avec 5 valeurs de pression 0.5 bar, 1 bar, 1.5 bar, 2 bar et 2.5 bar. Les résultats obtenus nous ont permit d'en déduire que la pression de 1bar donne la meilleure couverture et répartition du jet de pulvérisation. A partir de la pression de 1.5 bar commence la dérive, et des pressions plus élevées rendent le jet irrégulier et hors cible. L'augmentation de pression augmente les pertes en bouillie et la quantité de fines gouttelettes. [less ▲]

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See detailEffets de la vibrotonie corporelle totale sur le risque de chute de la personne âgée: Mise au point
Buckinx, Fanny ULiege; Reginster, Jean-Yves ULiege; Petermans, Jean ULiege et al

in Ortho-Rhumato (2014), 12(6), 6-9

Les chutes constituent un problème majeur de santé publique. Si le bénéfice de l’exercice physique sur la prévention des chutes est avéré, les exercices classiques ne sont pas toujours adaptés pour les ... [more ▼]

Les chutes constituent un problème majeur de santé publique. Si le bénéfice de l’exercice physique sur la prévention des chutes est avéré, les exercices classiques ne sont pas toujours adaptés pour les personnes âgées. C’est pourquoi la vibrotonie corporelle totale, en permettant la réalisation d’exercices isométriques, pourrait théoriquement s’avérer être une bonne alternative pour les séniors. Depuis les années 2000, plusieurs études ont évalué les effets de la vibrotonie corporelle totale sur le risque de chute. Les résultats individuels de ces recherches sont assez variables, ce qui pourrait, entre autres, s’expliquer par la variété des protocoles utilisés, des populations cibles, des critères d’évaluation choisis et de la qualité méthodologique. Globalement, il semblerait que les appareils de vibrotonie du corps entier puissent améliorer, de manière statistiquement significative, différents paramètres de la marche et de l’équilibre et pourraient dès lors réduire le risque de chute des patients âgés. Toutefois, les durées d’exposition, les fréquences de stimulation et les amplitudes d’oscillations varient sensiblement d’une étude à l’autre et il est actuellement impossible d’en dégager un protocole précis. [less ▲]

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See detailEffets de la vitesse de croissance au pâturage chez des taurillons finis en stabulation: I. Performances zootechniques
Dufrasne, Isabelle ULiege; Hornick, Jean-Luc ULiege; Gauthier, Sabine et al

in Annales de Zootechnie (1995), 44

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See detailEffets de lisière et sex-ratio de rongeurs forestiers dans un écosystème fragmenté en République Démocratique du Congo (Réserve de Masako, Kisangani)
Iyongo Waya Mongo, L; De Cannière, C; Ulyel, J et al

in Tropicultura (2013), 31(1), 3-9

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See detailEffets de lisière sur la productivité du teck (Tectona grandis L.f.): étude de cas des teckeraies privées du Sud-Bénin
Toyi, Mireille Scholastique; Bastin, Jean-François ULiege; Andre, Marie ULiege et al

in Tropicultura (2013), 31(1), 62-70

The present study aims to improve the production of teak wood (Tectona grandis L.f.) in private plantations in southern Benin through the application of a central concept in landscape ecology: the edge ... [more ▼]

The present study aims to improve the production of teak wood (Tectona grandis L.f.) in private plantations in southern Benin through the application of a central concept in landscape ecology: the edge effect. As teak is an heliophilous species, the hypothesis of a higher wood production in edges was tested on the basis of the basal area. Sixty-two private teak plantations were investigated and 10,667 trees were measured. The stratified sampling scheme in three distinct parts for each plantation (the centre, the edge and the summits) permitted to highlight the edge effect on wood production. For each part, a plot was installed and the diameter at breast height (dbh) was measured for all trees. The leaf area between the edge and the centre of plantations was measured. Finally, the influence of the spatial configuration of plantations and the direction of each side of these plantations on the production of wood was tested. Results show that the edge effect on the production of teak wood affects four planting lines, the first presenting a production of 150% relative to the centre. We noticed a significant influence of the edge on the leaf area of about 218% relative to the centre. No influence of the direction of the sides of the plantation was observed. The shape of the plantations presents a significant influence on the wood production. These results permitted to propose a planting model included in an agroforestry system that optimizes the production of wood per area and having a succession of two planting lines interrupted by fields. [less ▲]

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See detailEffets de lisière sur la teneur en eau et la température du sol à l'échelle du jardin systématique de l'INERA/Yangambi en R.D. Congo
Alongo Longomba, S; Visser, M; Kombele Bishosha, F et al

in Annales des Instituts Supérieurs d’Etudes Agronomiques de Bengamisa (2013), 5

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See detailEffets de parole vive. Poétique de la saynète dans la presse satirique illustrée des années 1830-1840
Stienon, Valérie ULiege

in Thérenty, Marie-Ève; Pillet, Élisabeth (Eds.) Presse, chansons et culture orale au XIXe siècle. La parole vive au défi de l’ère médiatique (2012)

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See detailEffets de retard et de piégeage des polluants dus à la présence d’eau immobile dans le milieu souterrain : importance de ces effets et modélisation
Brouyère, Serge ULiege; Hallet, Vincent; Dassargues, Alain ULiege

in Actes du Colloque National du CBGI/BCIG :’La Géologie de l’Ingénieur et l’eau dans le sous-sol’ (1997)

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See detailEffets de trois Alcaloides Extraits du Strychnos usambarensis sur des Cellules Cancereuses en Culture
Bassleer, Roger ULiege; De Pauw-Gillet, Marie-Claire ULiege; Massart, B. et al

in Planta Medica (1982), 45(6), 123-6

The cellular effects of three alkaloids isolated from STRYCHNOS USAMBARENSIS (melinonine F, strychnofoline, 18-19-dihydro-usambarine) are analysed by cytological methods in experimental animal tumours ... [more ▼]

The cellular effects of three alkaloids isolated from STRYCHNOS USAMBARENSIS (melinonine F, strychnofoline, 18-19-dihydro-usambarine) are analysed by cytological methods in experimental animal tumours cultivated IN VITRO (B 16 mouse melanoma cells, mouse Ehrlich tumour cells ELT, HW 165 rat hepatoma). Under some experimental conditions, a certain degree of antimitotic activity is demonstrated. [less ▲]

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See detailLes effets délétères métaboliques et oxydants induits lors d'un sepsis sur la fonction rénale
Quoilin, Caroline ULiege

Doctoral thesis (2014)

Acute kidney injury (AKI) is a frequent complication of sepsis that can increase mortality as high as 70%. The pathophysiology of this kidney failure was previously believed to be secondary to decreased ... [more ▼]

Acute kidney injury (AKI) is a frequent complication of sepsis that can increase mortality as high as 70%. The pathophysiology of this kidney failure was previously believed to be secondary to decreased global renal perfusion causing hypoxia-induced injury. However, new research suggests this paradigm is overly simplistic, and injury is now considered multifactorial in origin. Mechanisms that contribute to kidney injury mainly include inflammation, alterations in microvascular renal blood flow and changes in bioenergetics. To study the mechanism of oxygen regulation in acute kidney injury during sepsis, we developed a sepsis-induced in vitro model using proximal tubular epithelial cells (HK-2) exposed to a bacterial endotoxin (lipopolysaccharide, LPS). Our first investigation, by using both high-resolution respirometry and electron spin resonance spectroscopy, showed that HK-2 cells exhibit a decreased oxygen consumption rate when treated with LPS. Surprisingly, this cellular respiration alteration persists even after the stress factor is removed. We suggested that this irreversible decrease in renal oxygen consumption after LPS challenge is related to a pathologic metabolic down-regulation such as a lack of oxygen utilization by cells for ATP production. In the long term, this metabolic disturbance leads cells to a predominantly apoptotic death. To confirm this hypothesis of cytopathic hypoxia, we demonstrated that this alteration in the renal respiratory function is mainly due to an impairment in the metabolic activity of HK-2 cell mitochondria. Following LPS treatment, the oxidative phosphorylation is interrupted because of the inhibition of cytochrome c oxidase activity. As a consequence, disruptions in the electron transport and the proton pumping across the system occur, leading to a decrease of the mitochondrial membrane potential, the release of apoptotic-inducing factors and a decrease in ATP production. To clarify the mechanism by which the LPS induces mitochondrial alterations, we studied the oxidative stress generation in HK-2 cells. Interestingly, we revealed that the induction of a cytosolic oxidative stress is an event that appears before mitochondrial dysfunction in the LPS-treated HK-2 cells. This primary redox state is notably due to the activation of the two enzymes NADPH oxidase 4 and inducible NO synthase. The simultaneous production of anion superoxide and nitric oxide strongly suggests the formation of peroxynitrite, a relative stable powerful oxidant that can diffuse through mitochondrial compartments and undergo cytotoxic reactions. To our knowledge, our model reveals for the first time the role of NADPH oxidase-derived cytosolic ROS in triggering tubular cell damage. Moreover, after being first target of the oxidative stress, mitochondria become in turn producer of reactive oxygen species that carry on mitochondrial dysfunction. It seems thus that a mechanism of oxidative stress-induced redox cycling is a main cause of the mitochondrial dysfunction of LPS-treated HK-2 cells. The role of oxidants in mitochondrial dysfunction was further confirmed by the use of iNOS inhibitors or antioxidants that preserve cytochrome c oxidase activity and block mitochondrial membrane potential dissipation. Overall, these results suggest that sepsis-induced AKI should not only be regarded as failure of energy status but also as an integrated response, including transcriptional events, ROS signaling, mitochondrial activity and metabolic orientation such as apoptosis. [less ▲]

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