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See detailEthnopharmacologie et paludisme au Burkina Faso : sélection de 13 espèces à potentialités antiplasmodiales méconnues
Jansen, Olivia ULg; Frederich, Michel ULg; Tits, Monique ULg et al

in Ethnopharmacologia (2008), 41

Dans la recherche de nouvelles substances actives contre les Plasmodium, les flores non explorées du Sud constituent une source potentielle privilégiée de nouveaux médicaments antipaludéens. Dans ce ... [more ▼]

Dans la recherche de nouvelles substances actives contre les Plasmodium, les flores non explorées du Sud constituent une source potentielle privilégiée de nouveaux médicaments antipaludéens. Dans ce travail, nous avons suivi une démarche ethnopharmacologique afin de répertorier et de sélectionner des végétaux intéressants à étudier en laboratoire pour leurs propriétés antiplasmodiales. Notre travail de recensement des espèces utilisées contre la malaria au Burkina Faso nous a permis de répertorier 72 espèces végétales utilisées seules ou en association dans le traitement traditionnel du paludisme dans ce pays d’Afrique de l’Ouest. Finalement, treize espèces ont été sélectionnées et dix-sept échantillons végétaux ont été récoltés au Burkina Faso pour évaluation de leurs propriétés antiplasmodiales en laboratoire. Les principaux critères de sélection ont été : leur utilisation traditionnelle contre la malaria et le fait que ces plantes n’aient pas (ou peu) été étudiées sur le plan antiplasmodial. Les liens de chimiotaxonomie éventuels avec des plantes déjà connues pour leurs propriétés antiplasmodiales ainsi que les possibilités de valorisation des espèces au niveau local (MTA) ont également été considérés. [less ▲]

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See detailEthnopharmacology and malaria in Africa
Frederich, Michel ULg; Jansen, Olivia ULg; Muganga, raymond et al

Conference (2015, July 12)

According to the last World Malaria Report [1], there were 584 000 deaths for 198 millions malaria cases worldwide in 2013. Particularly, the disease caused an estimated 437 000 African children died ... [more ▼]

According to the last World Malaria Report [1], there were 584 000 deaths for 198 millions malaria cases worldwide in 2013. Particularly, the disease caused an estimated 437 000 African children died before their fifth birthday, still in 2013. Malaria is caused by a parasite, Plasmodium sp. and transmitted by Anopheles mosquitoes. The problem of parasite resistance towards common available medicines such as chloroquine, mefloquine, quinine, is increasing. In this context, the vegetal kingdom remains the main source of pharmacologically active compounds against this parasitic infection as attested by the famous quinine, isolated from Cinchona sp., artemisinin extracted from Artemisia annua and also atovaquone derived from lapachol found in several Bignoniaceae. All these substances are related to plants with traditional use against fever and malaria. Beside these well-known examples, various new antiplasmodial compounds are frequently discovered from Nature, particularly following an ethnopharmacological approach, as reviewed by several authors in recent years [2-6]. Then, the pharmacological and phytochemical study of plants from traditional pharmacopoeias can be of first interest not only to discover new antimalarial “lead compounds”, but also to valorize local vegetal species whose efficacy and safety would have been demonstrated in laboratory and clinical investigations [7]. As demonstrated in several works from Willcox [8], better knowledge of plants from traditional pharmacopoeias and local valorization of validated traditional remedies in Improved Traditional Medicine (ITM) could allow the access to effective, standardized, available and affordable therapeutics for management of malaria by local populations. After this introductive section, the second part of the talk will be dedicated to the presentation of some results obtained in Liège with Dicoma tomentosa from Burkina-Faso [9], Strychnos icaja from Cameroun [10] and Terminalia mollis from Rwanda [11]. 1. WHO, World Malaria Report 2014, December 2014, Geneva (http://www.who.int/malaria/publications/world_malaria_report_2014/en/). 2. Batista R, Silva Ade J Jr, de Oliveira AB: Plant-derived antimalarial agents: new leads and efficient phytomedicines. Part II. Non-alkaloidal natural products. Molecules 2009, 14:3037-72. 3. Bero J, Frédérich M, Quetin-Leclercq J : Antimalarial compounds isolated from plants used in traditional medicine. Journal of Pharmacy and Pharmacology 2009, 61:1401–1433. 4. Bero J and Quetin-Leclercq J: Natural products published in 2009 from plants traditionally used to treat malaria. Planta Medica 2011, 77:631-40. 5. Kaur K, Jain M, Kaur T, Jain R: Antimalarials from nature. Bioorganic & Medicinal Chemistry 2009, 17:3229–3256. 6. Nogueira CR and Lopes LMX: Antiplasmodial Natural Products. Molecules 2011, 16:2146-2190 7. Ginsburg H and Deharo E: A call for using natural compounds in the development of new antimalarial treatments – an introduction. Malaria Journal 2011, 10 (suppl. 1):S1 8. Willcox M, Graz B, Falquet J, Diakite C, Giani S, Diallo D: A “reverse pharmacology” approach for developing an antimalarial phytomedicine. Malaria journal 2011, 10(suppl1):S8 9. Jansen, O., Tits, M., Angenot, L., Nicolas, J.-P., De Mol, P., Nikiema, J.-B., & Frédérich, M : Anti-plasmodial activity of Dicoma tomentosa (Asteraceae) and identification of urospermal A-15-O-acetate as the main active compound. Malaria Journal 2012, 11, 289. 10. Tchinda, A. T., Jansen, O., Nyemb, J.-N., Tits, M., Dive, G., Angenot, L., & Frédérich, M. Strychnobaillonine, an unsymmetrical bisindole alkaloid with an unprecedented skeleton from Strychnos icaja roots. Journal of Natural Products 2014, 77(4), 1078–82. 11. Muganga, R., Angenot, L., Tits, M., & Frédérich, M : In vitro and in vivo antiplasmodial activity of three Rwandan medicinal plants and identification of their active compounds. Planta Medica 2013, 80(6), 482-489. [less ▲]

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See detailAn ethnoprimatological approach of the human-macaque interactions at the Ubud Monkey Forest, Bali (Indonesia)
Brotcorne, Fany ULg; Fuentes, Agustin; Wandia, I Nengah et al

Conference (2014, September 24)

Macaque tourism, i.e. a tourist activity focusing on wild macaques as main attraction, is an example of the bourgeoning and diversified human-macaque interactions in Southeast Asia. Although both people ... [more ▼]

Macaque tourism, i.e. a tourist activity focusing on wild macaques as main attraction, is an example of the bourgeoning and diversified human-macaque interactions in Southeast Asia. Although both people and macaques can benefit from their interactions at tourist sites, this activity also raises several conservation and management issues which are essential to understand in order to promote a sustainable coexistence. Using an ethnoprimatological approach, we provide here an assessment of the effect of a long-term management regime at the very popular tourist Ubud Monkey Forest in Bali, Indonesia. Over a four-month period in 2013, we characterized the visitor-macaque interactions with ethological methods and we compared our data with those collected 12 years earlier by Fuentes and colleagues. In parallel, we conducted a questionnaire survey, interviewing 99 Balinese people to assess their attitudes towards macaques and the Monkey Forest. Our results confirmed that the management efforts to reduce the aggressiveness of macaques towards visitors have been effective. Indeed, we observed a considerable reduction of the frequency and intensity of agonistic interspecies interactions. However, the interactions between macaques and visitors frequently involved close physical contact, such as during provisioning. Men on the human side, and adult or subadult males on the macaque side, were the groups the most frequently involved in these types of interaction. A reinforcement of the management practices limiting close interspecies contact interactions by targeting the most exposed groups, is therefore necessary in order to reduce the risk of pathogen cross-species transmission. Our questionnaire survey revealed globally a high level of tolerance of local people towards macaques in Ubud. These positive attitudes were determined by the economic and cultural benefits derived from the macaque presence and tourism activity, as far as they compensate for the nuisances caused by macaques. Crop raiding in cultivated fields surrounding the Monkey Forest was still a source of tension which would require further management efforts including the development of open buffer zones. [less ▲]

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See detailEthnopsychologie et acculturation
Stassart, Martine ULg

in Stassart, Martine (Ed.) Mélanges Cliniques (1998)

The Szondi-test is especially adequate for the psychodynamic exploration of non occidental people because it is a non verbal projective technique. From the beginning of his work Szondi has isolated a ... [more ▼]

The Szondi-test is especially adequate for the psychodynamic exploration of non occidental people because it is a non verbal projective technique. From the beginning of his work Szondi has isolated a special state of the Ego which he named "participative". This concept was a creation of the french anthropologist and philosoph Lucien LEVY-BRUHL.Though this author was seriously criticized, his theory contains some truth. The author of this article makes a complete review of the enquiries with the Szondi-test about non occidental people ( Gabon, Burundi, Congo, Mexican Indians, Tunisian women). All the studies reveal that the so-called "primitive" people are strongly resisting, thanks their "mystical participation", against the occidental influence which is characterized by two main factors: the ideal goal of personal individuation and the requirements of the Superego. This opinion was promoted by Freud in his well known work "Civilization and its discontents". The experimental results obtained with the Szondi-test correlate with the freudian theory about the cultural demands. [less ▲]

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See detailEthologie des fourmis Eutetramorium mocquerysi (Emery, 1900) Hymenoptera, Formicidae, en laboratoire
Raharimalala, Fara Nantenaina ULg

Master of advanced studies dissertation (2006)

The laboratory breeding study of Eutetramorium mocquerysi was conducted in an artificial fourmiliere: formicarium. The colonies were nourished with portions of insects (larvae of coleoptera, locusts ... [more ▼]

The laboratory breeding study of Eutetramorium mocquerysi was conducted in an artificial fourmiliere: formicarium. The colonies were nourished with portions of insects (larvae of coleoptera, locusts, cockroaches. ..).All social insects have several morphoanatomic castes (worker dominating, workers of high ranks: being able to become dominating, workers of low ranks: veritable worker,and the ant male). As with all social insects, the life of the colony is regulated by the queen. However, in the species studied no veritable queen exists. This function is fulfilled by a dominating worker, whose dominance is assured partly by constant fights with the young workers and partly by maximum ovarial development. Dominant worker and workers of the high ranks have six (6) ovarioles, while the veritable workers possess just two (2) ovarioles. The presence of a dominant worker in the nest allows the regulation of the laborious life of the colony, the maintenance of inferior workers ranks and the control of male abundance in the colony. [less ▲]

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See detailL’éthologie en deuil…
Poncin, Pascal ULg

Article for general public (2008)

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See detailÉthologie et criminologie clinique : Debuyst avec Demaret pour une éthique de l’adaptation
Adam, Christophe; Englebert, Jérôme ULg

in Cahiers de Psychologie Clinique (2016), 47

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See detailÉthologie et psychiatrie - Albert Demaret
Englebert, Jérôme ULg; Follet, Valérie

Book published by Mardaga - Réédition et mise à jour commentée (2014)

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See detailEthologie et psychiatrie : hommage au travail du Docteur Albert Demaret
Englebert, Jérôme ULg; Gauthier, Jean-Marie ULg

in Acta Psychiatrica Belgica (2011), 111(4), 8-12

Albert Demaret (1933-2011) is one of the pioneers of evolutionary psychiatry and of an ethological conception of psychopathology. In this paper, the authors propose a summary of the epistemological ... [more ▼]

Albert Demaret (1933-2011) is one of the pioneers of evolutionary psychiatry and of an ethological conception of psychopathology. In this paper, the authors propose a summary of the epistemological context of his work and detail its approach to anorexia nervosa and bipolar disorder. [less ▲]

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See detailL'éthologie. Histoire naturelle du comportement
Renck, Jean-Luc; Servais, Véronique ULg

Book published by Seuil (2002)

Jean-Luc Renck et Véronique Servais retracent dans ce livre l'histoire de cette science contemporaine qui prend sa source dans l'Antiquité grecque, avec les classifications d'Aristote, et dont les ... [more ▼]

Jean-Luc Renck et Véronique Servais retracent dans ce livre l'histoire de cette science contemporaine qui prend sa source dans l'Antiquité grecque, avec les classifications d'Aristote, et dont les découvertes actuelles tendent à rapprocher l'homme de l'animal. Les lecteurs intéressés par l'éthologie y découvriront avec plaisir une synthèse rigoureuse, mais non dénuée d'humour, des découvertes et des questions liées à cette discipline qui promet encore de nombreuses surprises. [less ▲]

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See detailEthos
Saint-Amand, Denis ULg; Glinoer, Anthony

in Saint-Amand, Denis; Glinoer, Anthony (Eds.) Lexique Socius (2014)

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See detailÉthos reproducteur et habitus techniciste. Naissance du “modèle” éditorial belge francophone
Durand, Pascal ULg

in Michon J.; Mollier J.-Y. (Eds.) Les Mutations du livre et de l’édition dans le monde du XVIIIe siècle à l’an 2000 (2001)

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See detailEthos y postura de Nellie Campobello
Vanden Berghe, Kristine ULg

in Cantú, Roberto (Ed.) Equestrian Rebels. Essays on Mariano Azuela and the Novel of the Mexican Revolution (2016)

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See detailEthylene polymerization by a high activity MgCl2 supported Ti catalyst in the presence of hydrogen and/or 1-octene
Hindryckx, François; Dubois, Philippe ULg; Jérôme, Robert ULg et al

in Polymer (1998), 39(3), 621-629

This paper presents the results of slurry polymerisation of ethylene that has been initiated by an Al/Ti/Mg-alcohol supported catalyst. Special attention has been paid to the effects of hydrogen, catalyst ... [more ▼]

This paper presents the results of slurry polymerisation of ethylene that has been initiated by an Al/Ti/Mg-alcohol supported catalyst. Special attention has been paid to the effects of hydrogen, catalyst composition and addition of an α-olefin on catalyst efficiency, molecular weight, crystallinity, and physico-mechanical properties of the final polyolefin. The efficiency of this Al/Ti/Mg catalyst, molecular weight and melting temperature of the formed High Density Polyethylene (HDPE) has been found to decrease as the partial pressure of hydrogen is increased. In parallel, crystallinity and elongation at break of HDPE increase. The composition of this Al/Ti/Mg catalyst has a marked effect on catalyst efficiency, e.g. decrease in the Ti relative content results in an improved efficiency from 86 to 7942 kg PE g-l Ti h-1 as the Mg/Ti molar ratio is increased from 1 to 333. Copolymerisation with 1-octene has also been investigated. When ethylene polymerisation is carried out with this Al/Ti/Mg catalyst at a Mg/Ti ratio of 333, addition of the cr-olefin is responsible for a decrease in the polymerisation rate, which is typical of a negative 'comonomer' effect. This effect is still more pronounced in the presence of H2. Comparison with other catalytic systems has been made in order to understand the role played by the cr-olefin and/or hydrogen on the catalyst efficiency and the physico-mechanical properties of the resulting polyolefins. [less ▲]

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See detailEthylene polymerization mediated by nickel(II) covalently anchored to silica xerogels
Lambert, Stéphanie ULg; Sacco, Luigi

Conference (2015, September 08)

Heterogeneous catalysis is generally widely preferred for industrial applications thanks to the well-known advantages of easier product-catalyst separation and recovery of the catalyst process and, often ... [more ▼]

Heterogeneous catalysis is generally widely preferred for industrial applications thanks to the well-known advantages of easier product-catalyst separation and recovery of the catalyst process and, often, to the enhanced stability of the catalyst. But in terms of selectivity, homogeneous catalysis usually provides better results. From this point of view, the grafting of homogeneous catalysts onto a solid support seems the ideal combination in order to achieve the advantages of both heterogeneous and homogeneous catalysis, allowing the developing of more environmentally friendly and economical processes with potential application in the industry. Further, to covalently link a homogeneous onto silica (a support which is thermally, chemically and mechanically resistant, with a well defined structure) is the best way to limit metal leaching and sintering. Nitrogen-based ligands containing one of several Schiff bases have been reported to form active catalysts with “late-metal” (such as Fe, Pd, Ni,…) for the ethylene polymerization [1]. Moreover, substituted pyrazole-based organometallic complexes gave also promising results in this field. These facts let us suggest that the pyrazolylpyridine derivatives bearing a tethered trimethoxysilylated group synthesized in a previous work [2] are potentially good candidate to prepare hybrid catalyst (i.e. soluble organometallic complexes covalently bonded onto an insoluble support, in this case silica) with Ni-II, Fe-II or Pd-II for ethylene polymerization. [less ▲]

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See detailEthylene production and polyamine content of fully habituated sugarbeet calli
Hagege, D.; Kevers, Claire ULg; Geuns, J. et al

in Journal of Plant Physiology (1994), 143(6), 722-725

[No abstract available]

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See detailL'éthylisme zutique
Saint-Amand, Denis ULg

in Lefrère, Jean-Jacques; Pierssens, Michel (Eds.) Alcools, actes du XVIe colloque des Invalides (2013)

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