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Peer Reviewed
See detailEtude de prévalence du burnout dans la population des travailleurs belges
Schippers, Nathalie ULg; DE CIA, Julie ULg; Barbier, Marie ULg et al

Conference (2011, November 04)

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Peer Reviewed
See detailEtude de quelques dérivés benzothiadiaziniques apparentés au diazoxide et aux thiazides en tant qu’activateurs de canaux potassiques
Khelili, S.; Nguyen, Q. A.; Faury, G. et al

Poster (2000, May)

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See detailEtude de quelques réactions spécifiques de la fraction argileuse en présence de chaux
Goffeau, A.; Rassel, A.; Marcoen, Jean Marie ULg

Report (1978)

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See detailEtude de raies d'OCS en atmosphère d'azote
Mouchet, Anne ULg

Master's dissertation (1983)

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See detailEtude de Rénovation rurale en Ourthe-Amblève
Vauchel, Bernadette ULg

in Sporck, J. A. (Ed.) Ministère des Travaux Publics – Administration de l’Urbanisme et de l’Aménagement du Territoire, 2ème partie (1979)

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See detailEtude de spécimens de progymnospermes «type Callixylon » de Ronquières (Dévonien moyen, Belgique).
Cornet, Luc ULg; Gerrienne, Philippe ULg; Meyer-Berthaud, Brigitte

in Miscellanea palaeontologica 2010 (2010, November 30)

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See detailEtude de tendance dans les hauteurs piézométriques mesurées au piézomètre de Viemme
Orban, Philippe ULg; Batlle-Aguilar, Jordi; Brouyère, Serge ULg et al

Report (2008)

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See detailEtude de Textes Littéraires Anglais Modernes
Delville, Michel ULg; Pagnoulle, Christine ULg; Norris, Andrew et al

Learning material (2000)

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See detailEtude de trois souches entomopathogènes de champignons Hyphomycètes dans la lutte contre les moustiques (Diptères : Culicidae)
Bawin, Thomas ULg

Master's dissertation (2012)

Mosquitoes (Diptera: Culicidae) are zoonotic vectors of medical and veterinary importance. The prospects for the use of three Hyphomycetes fungi (Aspergillus clavatus Desm., Metarhizium anisopliae (Metsch ... [more ▼]

Mosquitoes (Diptera: Culicidae) are zoonotic vectors of medical and veterinary importance. The prospects for the use of three Hyphomycetes fungi (Aspergillus clavatus Desm., Metarhizium anisopliae (Metsch.) Sorokin, and Metarhizium sp.) towards an important vector species (Culex quinquefasciatus Say) are discussed. 1. Culture tests were performed in flasks to assess the spore productivity of the fungal strains on wheat bran (an agricultural by-product) and husked rice (a food product that is classically used) in solid, semi-solid and liquid-state media. Regardless of the substrate, solid-state media showed the highest productivity. The observations suggested that culture tests could be carried out in solid-state or sequential fermentation with wheat bran. 2. Classical toxicity tests using aqueous suspensions of spores were performed to assess their larvicidal potential against C. quinquefasciatus. The LD50 and LD90 were estimated after 72 hours of treatment with 1.35 x 10^8 and 5 x 10^8 spores/ml for Aspergillus clavatus, 1.3 x 10^8 and 4 x 10^8 spores/ml for Metarhizium anisopliae, 1.75 x 10^8 and 9.9 x 10^8 spores/ml for Metarhizium sp. Mycelial filaments appeared from dead larvae and produced spores in the case of each strain. Spores were also found in the gut of emerged adults from surviving larvae. In comparison, the LC50 and LC90 of a commercial formulation based on the bacterium Bacillus thuringiensis var. israelensis (Vectobac ®, serotype H14) were estimated after 48 hours to 0.043 mg/l and 0.115 mg/l. The results showed that the fungi tested cannot be effective control agents at the tested doses and the applied protocol. Different axes of research are suggested. 3. The potentialities of the injection of spore suspensions into mosquito larvae in order to assess their pathogenicity have been considered. The percentages of corrected mortality were obtained after 72 hours for Aspergillus clavatus (62%), Metarhizium anisopliae (53%) and Metarhizium sp. (57%). Additional experiments would be needed to make sure whether it is well a direct response linked to the toxic effect of these fungi. 4. Optical and electron microscopy observations were conducted to study the mode of action of A. clavatus on C. quinquefasciatus larvae. Histological sections revealed that the lethal effect observed in toxicity tests is due to the ingestion of spores. An analysis of toxins produced at the beginning of germination, their contribution to larval mortality and their impact on non-target organisms should be carried out. 5. Finally, the specificity of the pathogenicity of A. clavatus and M. anisopliae against mosquitoes has been evaluated by considering another biological model: the aphid Acyrthosiphon pisum Harris. No link between the range of tested doses and (1) mortality of adults, (2) the decline of their offspring was found. Additional experiments should be carried out. The application of these fungi to other insects of agricultural, veterinary or medical interest should also be tested. [less ▲]

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See detailÉtude dendrométrique d’Acacia auriculiformis A. Cunn. ex Benth. en mélange sur vertisol au Bénin
Fonton, N. H.; Glele Kakai, R.; Rondeux, Jacques ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2002), 6(1), 29-37

Acacia auriculiformis is a fast growing species planted on vertisols in Benin. An inventory of 11 mixed stands of Acacia, which are 7 to 9 years old, has been realized to estimate growth parameters of the ... [more ▼]

Acacia auriculiformis is a fast growing species planted on vertisols in Benin. An inventory of 11 mixed stands of Acacia, which are 7 to 9 years old, has been realized to estimate growth parameters of the stands. The present study shows that, for the dendrometrical parameters, there is no difference between species associations at a 0.05 significance level. Nevertheless, the largest values of quadratic mean diameter of the stems foot are observed in the species associations including Leucaena leucocephala. Moreover, the branch volume decreases with the increasing of the number of stems per tree. The most appropriate volume function for Acacia auriculiformis is the one that takes into account the diameter of the stems foot and the total height. Otherwise, the species associations do not influence the profile of Acacia trees, which is constant within the associations. The predicted conversion and cutting coefficients show that the stacked wood volume represents about 144 % of the real stand volume. [less ▲]

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Peer Reviewed
See detailEtude dendrométrique de l'épicéa commun (Picea Abies Karst.)
Thill, A.; Palm, Rodolphe ULg

in Bulletin des Recherches Agronomiques de Gembloux (1975), 10

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Peer Reviewed
See detailEtude dendrométrique de l'érable sycomore (Acer pseudoplatanus L.) et du merisier (Prunus avium L.)
In, K.; Rondeux, Jacques ULg; Thill, André

in Bulletin des Recherches Agronomiques de Gembloux (1972), 7(1-4), 134-190

Au cours des dernières années, le Centre d'Ecologie forestière (IRSIA) a étudié en collaboration avec le Bureau de Biométrie (IRSIA) et la Chaire de Sylviculture de la Faculté des Sciences Agronomiques de ... [more ▼]

Au cours des dernières années, le Centre d'Ecologie forestière (IRSIA) a étudié en collaboration avec le Bureau de Biométrie (IRSIA) et la Chaire de Sylviculture de la Faculté des Sciences Agronomiques de Gembloux, la répartition, l'écologie stationnelle et la dendrométrie de trois essences feuillues : le frêne, l'érable sycomore et le merisier. Pour ce qui concerne le frêne, les résultats ont déjà été publiés (DAGNELIE P., RONDEUX J. et THILL A., 1969). La présente étude s'articule en deux parties, la première se rapporte à l'érable sycomore et la seconde au merisier. Pour chacune de ces deux espèces les les éléments suivants sont présentés : 1) L'identité et la description des peuplements où les données biométriques ont été récoltées : paragraphes 2.1 (érable) et 4.1 (merisier) ; 2) Les conditions stationnelles de ces peuplements : paragraphes 2.2 (érable) et 4.2 (merisier) ; 3) Les mensurations effectuées : paragraphe 2.3 (érable et merisier) ; 4) L'analyse des résultats dendrométriques effectués sur 419 érables sycomores, répartis dans 28 peuplements et sur 334 merisiers, répartis dans 24 peuplements. Cette analyse permet d'établir des tarifs de cubage : paragraphes 3.1 et 3.2 (érable) et 5.1 (merisier), et une série de rapports dendrométriques : paragraphes 3.3 (érable) et 5.2 (merisier). La discussion des résultats fait l'objet du paragraphe 6. [less ▲]

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See detailEtude dendrométrique de Pterocarpus erinaceus Poir. des formations naturelles de la zone soudanienne au Bénin
Glele Kakai, R. L.; Sinsin, B.; Palm, Rodolphe ULg

in Agronomie africaine (2008), XX(3), 245-255

Detailed reference viewed: 58 (4 ULg)
Peer Reviewed
See detailEtude dendrométrique des bouleaux indigènes (Betula pendula Roth et Betula pubescens Ehrh.)
Thill, A.; Palm, Rodolphe ULg

in Bulletin des Recherches Agronomiques de Gembloux (1980), 15(3), 257-272

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See detailEtude dendrométrique des chênes indigènes (Quercus robur L. et Quercus petrae (Mattuschka) Lieblein)
Thill, A.; Palm, Rodolphe ULg

in Notes Techniques du Centre d'Ecologie Forestière et Rurale (1979), 33

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailEtude dendrométrique des chênes indigènes (Quercus robur L. et Quercus petraea (Mattuschka) Lieblein).
Thill, A.; Palm, Rodolphe ULg

in Bulletin des Recherches Agronomiques de Gembloux (1979), 14(3-4), 267-284

Detailed reference viewed: 9 (1 ULg)