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See detailContact model between superelements in dynamic multibody systems
Virlez, Geoffrey ULg; Bruls, Olivier ULg; Sonneville, Valentin ULg et al

in Proceedings of ASME2013 International Design Engineering Technical Conference & Computers and Information in Engineering Conference IDETC/CIE 2013 (2013, August)

In this paper, a new contact formulation defined between flexible bodies modeled as superelements is investigated. Unlike rigid contact models, this approach enables to study the deformation and vibration ... [more ▼]

In this paper, a new contact formulation defined between flexible bodies modeled as superelements is investigated. Unlike rigid contact models, this approach enables to study the deformation and vibration phenomena induced by hard contacts. Compared with full-scale finite element models of flexible bodies, the proposed method is computationally more efficient, especially in case of a large number of bodies and contact conditions. The compliance of each body is described using a reduced-order elastic model which is defined in a corotational frame that follows the gross motion of the body. The basis used to reduce the initial finite element model relies on the Craig-Bampton method which uses both static boundary modes and internal vibration modes. The formulation of the contact condition couples all degrees of freedom of the reduced model in a nonlinear way. The relevance of the approach is demonstrated by simulation results first on a simple example, and then on a gear pair model. [less ▲]

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See detailContact-killing polyelectrolyte microcapsules based on chitosan derivatives
Cui, Di; Szarpak, Anna; Pignot-Paintrand, Isabelle et al

in Advanced Functional Materials (2010), 20(19), 3303-3312

A new type of multilayer capsules is designed for use as antibacterial vehicles by taking advantage of the properties of natural polysaccharides. These capsules, prepared by layer-by-layer assembly of ... [more ▼]

A new type of multilayer capsules is designed for use as antibacterial vehicles by taking advantage of the properties of natural polysaccharides. These capsules, prepared by layer-by-layer assembly of hyaluronic acid (HA; see graphic) and quaternized chitosan (QCHI) derivatives onto sacrificial colloidal particles, show distinct killing activities depending on the nature of the polysaccharide on the surface. [less ▲]

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See detailA contactin-receptor-like protein tyrosine phosphatase beta complex mediates adhesive communication between astroglial cells and gonadotropin-releasing hormone neurons
Parent, Anne-Simone ULg; Mungenast, Alison; Lomniczi, Alejandro et al

in Journal of Neuroendocrinology (2007), 19

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See detailContagion inside the Credit Default Swaps markets in the light of 2008 crisis
Sougné, Danielle ULg; Mattar, Jamal ULg

in Journal of Business and Economics (2012)

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See detailThe containment strategy of extreme right wing parties : a failure ?
Italiano, Patrick ULg; Pieters, Jérôme ULg; Kovincic, Petar ULg et al

Conference (2012, November)

When confronted to data from European social Survey, there seems to be no link between the acceptance of immigration by public opinion in a sample of western Europe countries and the presence of extreme ... [more ▼]

When confronted to data from European social Survey, there seems to be no link between the acceptance of immigration by public opinion in a sample of western Europe countries and the presence of extreme right parties in those countries. This contradicts various political analysis and some other data. The paper states this possible discrepancy and tries to find explanations [less ▲]

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See detailUn contaminant envahissant : nouveau regard sur le thigmotropisme fongique.
Quatresooz, Pascale; Blaise, Géraldine; Henry, Frédérique ULg et al

in Dermatologie Actualité (2008), 107

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See detailContaminants in blood of infants on prolonged intravenous therapy.
Battisti, Oreste ULg; François, Baudouin; Leyssens, Luc et al

in Lancet (1986), 1

Detailed reference viewed: 14 (5 ULg)
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See detailContamination and detoxication processes in marine mammals from European coasts
Das, Krishna ULg

Doctoral thesis (2002)

The aim of the present work was to determine the relationships between trace metal levels and different factors such as species, geographic origin, diet, age and general body condition of marine mammals ... [more ▼]

The aim of the present work was to determine the relationships between trace metal levels and different factors such as species, geographic origin, diet, age and general body condition of marine mammals from European seas [less ▲]

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See detailLa contamination de l'eau et des aliments par les virus pathogènes pour l'homme
Scipioni, Alexandra ULg; Daube, Georges ULg; Thiry, Etienne ULg

in Annales de Médecine Vétérinaire (2000), 144

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See detailLa contamination de la filière laitière par les mycotoxines : un risque pour la santé publique en Afrique subsaharienne
Ruppol, Patrick; Delfosse, Philippe; Hornick, Jean-Luc ULg

in Annales de Médecine Vétérinaire (2004), 148(3), 141-146

Mycotoxins are toxic metabolites produced by some fungi developing on several agricultural commodities. In sub-Saharan Africa, the recent changes in feeding practices increase the risk of contamination ... [more ▼]

Mycotoxins are toxic metabolites produced by some fungi developing on several agricultural commodities. In sub-Saharan Africa, the recent changes in feeding practices increase the risk of contamination for dairy cattle and subsequently the passage of mycotoxins in the food chain. Aflatoxins are the major mycotoxins known to enter into milk and many milk-based foods. The naturally occurring aflatoxin B is (bio-) transformed by mammals into various metabolites including the aflatoxin M excreted in milk. Food processing aiming at long term food storage (sterilization, pasteurisation, freeze-drying.) do not alter, or only slightly, the toxicity of aflatoxins. The best option to reduce milk contamination is to prevent the introduction of contaminated feed in the dairy cattle diet. Very little information is available on the flux and modifications of mycotoxins (synthesis, alteration, dilution or concentration) during the processing of milk and milk-based products. Therefore this field of research is given a high priority by the scientific community. [less ▲]

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See detailContamination des sols par les activités minières à Lubumbashi (RDC). Incidences en matière de diagnostic et de choix de solutions de gestion.
Mpundu Mubemba, Michel; Ngoy Shutcha, Mylor; Faucon, Michel-Pierre et al

in Schwartz, Dominique (Ed.) Actes des 10emes JES (2009, May)

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See detailContamination du marsouin commun (Phocoena phocoena) de la Mer du Nord par des perturbateurs endocriniens persistants
Didimo Imazaki, Pedro Henrique ULg

Master's dissertation (2009)

Endocrine disrupters are molecules able to interfere with the endocrine system and are largely spread in the environment. The evaluation of the estrogenic activity of some of these substances by reporter ... [more ▼]

Endocrine disrupters are molecules able to interfere with the endocrine system and are largely spread in the environment. The evaluation of the estrogenic activity of some of these substances by reporter gene assays was the first aim of this paper. The substances chosen are also persistent organic pollutants (POP), which are capable to bioaccumulate in several organisms. Then, the occurrence of these substances was evaluated in the blubber tissue of North Sea harbour porpoises (Phocoena phocoena). Harbour porpoises are good indicators of the environmental contamination and therefore of seafood by POP. These POP were quantified by GC-MS and also by reporter gene assays. For the achievement of these aims, different analytical methods were developed. The following raking is proposed for the studied substances, according to their estrogenic activity: o,p’-DDT > o,p’-DDD > β-HCH > p,p’-DDT > p,p’-DDD > p,p’-DDE > δ-HCH > PCB 138 > γ-HCH > α-HCH > PCB 153 > HCB > PCB 180. None of them presented anti-estrogenic activity. The analysed samples presented high levels of POP, sometimes associated with estrogenic activity, confirming the occurrence of endocrine disruptors in these animals. [less ▲]

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See detailContamination of European otters (Lutra lutra) by PCB congeners and organochlorinated pesticides in the wetlands of western France
Tans, Michael; Hugla, Jean Louis; Libois, Roland ULg et al

in Netherlands Journal of Zoology (1996), 46(3-4), 326-336

During the forty years, otter (Lutra lutra) populations have severely declined over much of Europe. One of the main regression factors appears to be pollution by organochlorine xenobiotics, especially ... [more ▼]

During the forty years, otter (Lutra lutra) populations have severely declined over much of Europe. One of the main regression factors appears to be pollution by organochlorine xenobiotics, especially PCBs. The present study took place in France, in the wetlands of the Atlantic border, where otter populations are considered to the stable. Muscle, pericaudal fat, and liver of 33 otters were analysed for 22 PCB congeners and organochlorine pesticides. The mean concentrations of organochlorinated pesticides in samples are relatively low (from 0 to 5.71 mg/kg lipid weight). The PCB concentrations are higher (mean in muscular tissue: 26.19 mg/kg lipid weight), but still remain low compared to similar samples from other countries. The relation between PCB concentration and physiological variables is discussed. Congener specific analysis shows an important contamination due to highly chlorinated congeners and a poor contaminatin due to low chlorinated congeners. Potential hazards due to organochlorinated compounds are also discussed. [less ▲]

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See detailContamination of poultry flocks by the human pathogen Campylobacter spp. and strategies to reduce its prevalence at the farm level.
Vandeplas, Sabrina ULg; Marcq, Christopher ULg; Dubois Dauphin, Robin et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2008), 12(3), 317-334

Enteric Campylobacter spp. bacteria are human pathogens that frequently contaminate poultry flocks. Consumption of products from poultry origin may then lead to acute bacterial enteritis called ... [more ▼]

Enteric Campylobacter spp. bacteria are human pathogens that frequently contaminate poultry flocks. Consumption of products from poultry origin may then lead to acute bacterial enteritis called campylobacteriosis of which prevalence is increasing for about ten years in Europe. This review summarizes Campylobacter epidemiological data, risk factors for contamination in poultry flocks and conceivable strategies to control this pathogen. [less ▲]

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See detailContamination of the Marine Environment by trace metals: old and emergent elements, case studies and perspectives
Gobert, Sylvie ULg; Richir, Jonathan ULg

Scientific conference (2011, November 25)

Presentation of 18 trace elements (old: Cd, Ni, Cu, Zn, Cr, Pb, Fe ; emergent: Be, Al, V, Mn, Sb, As, Bi, Se, Mo, Ag, Sn studied in the laboratory of Oceanology. Study cases in the Mediterranaen Sea ... [more ▼]

Presentation of 18 trace elements (old: Cd, Ni, Cu, Zn, Cr, Pb, Fe ; emergent: Be, Al, V, Mn, Sb, As, Bi, Se, Mo, Ag, Sn studied in the laboratory of Oceanology. Study cases in the Mediterranaen Sea (Seagrass, mussel, seaurchin). [less ▲]

Detailed reference viewed: 47 (10 ULg)