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See detailApplication of mechanoregulatory models to simulate peri-implant tissue formation in an in vivo bone chamber
Geris, Liesbet ULg; Vandamme, Katleen; Naert, Ignace et al

in Journal of Biomechanics (2008), 41(1), 145-154

Several mechanoregulatory tissue differentiation models have been proposed over the last decade. Corroboration of these models by comparison with experimental data is necessary to determine their ... [more ▼]

Several mechanoregulatory tissue differentiation models have been proposed over the last decade. Corroboration of these models by comparison with experimental data is necessary to determine their predictive power. So far, models have been applied with various success rates to different experimental set-ups investigating mainly secondary fracture heating. In this study, the mechanoregulatory models are applied to simulate the implant osseointegration process in a repeated sampling in vivo bone chamber, placed in a rabbit tibia. This bone chamber provides a mechanically isolated environment to study tissue differentiation around titanium implants loaded in a controlled manner. For the purpose of this study, bone formation around loaded cylindrical and screw-shaped implants was investigated. Histologically, no differences were found between the two implant geometries for the global amount of bone formation in the entire chamber. However, a significantly larger amount of bone-to-implant contact was observed for the screw-shaped implant compared to the cylindrical implant. In the simulations, a larger amount of bone was also predicted to be in contact with the screw-shaped implant. However, other experimental observations could not be predicted. The simulation results showed a distribution of cartilage, fibrous tissue and (im)mature bone, depending on the mechanoregulatory model that was applied. In reality, no cartilage was observed. Adaptations to the differentiation models did not lead to a better correlation between experimentally observed and numerically predicted tissue distribution patterns. The hypothesis that the existing mechanoregulatory models were able to predict the patterns of tissue formation in the in vivo bone chamber could not be fully sustained. (c) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailDecline of antibiotic use in primary care.
Frippiat, Frédéric ULg; Chandrikakumari, Kavitha; Moutschen, Michel ULg

in Lancet Infectious Diseases (2008), 8(5), 272273

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See detailLesions cerebrales demyelinisantes decouvertes chez un patient immunocompetent VIH-1+.
Nkoghe, D.; Moutschen, Michel ULg; Demonty, Jean ULg

in Médecine et Maladies Infectieuses (2008), 38(9), 500-3

We report the case of a 32-year-old immunocompetent HIV patient, presenting with acute demyelinating leukoencephalopathy. The patient displayed clinical and radiological features similar to multiple ... [more ▼]

We report the case of a 32-year-old immunocompetent HIV patient, presenting with acute demyelinating leukoencephalopathy. The patient displayed clinical and radiological features similar to multiple sclerosis. Histology revealed inflammation with necrosis, demyelination and destruction of axons. Serum tests were negative for various infectious agents as well as specific cultures and PCR. Corticotherapy and many antibiotic treatments failed. Resorption of the lesions occurred after partial excision and highly-active antiretroviral therapy (HAART). No recurrence was noted. This demyelinating cerebral disease was considered as the primary manifestation of HIV infection. HIV implication in the genesis of the process and its perpetuating this condition was suspected, but the mechanism is unclear. Dysimmune consequences related to the early course of HIV infection could be prevented by antiretroviral treatment. This study was the first description of tritherapy effectiveness on HIV related multiple sclerosis (MS)-like illness. [less ▲]

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See detailLes vaccins contre la FCO protègent-ils le foetus?
Thiry, Etienne ULg

in Point Vétérinaire (2008), 287

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See detailLes formules basées sur la créatinine :indiscutable ?
Delanaye, Pierre ULg

Conference given outside the academic context (2008)

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See detailUn indicateur de l'étendue et de l'évolution du travail au noir en Belgique
Pacolet, J.; Pestieau, Pierre ULg; Baeyens, K. et al

in Revue Belge de Sécurité Sociale (2008), (4), 437-462

Although the methods for measuring the extent of undeclared work are improving continuously, they still have shortcomings today. The statistical apparatus is not adapted to the present-day needs for ... [more ▼]

Although the methods for measuring the extent of undeclared work are improving continuously, they still have shortcomings today. The statistical apparatus is not adapted to the present-day needs for mapping this phenomenon. The assignment is not simple either: making something visible that wants to remain hidden by definition. This article summarises a study that was conducted on behalf of the Belgian Science Policy and the Federal Public Service Employment, Labour and Social Dialogue in order to examine the possibilities to improve methods for measuring the extent of undeclared work in Belgium. The study revealed that eventually, a multitude of methods will have to be used. The bad image our country has because it accepts the most divergent estimates, can be turned into an advantage by taking the lead in conciliating and combining this multitude of methods. [less ▲]

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See detailSupports visuels réalisés dans le cadre des travaux pratiques de Chimie Analytique (Partie II)
Ziemons, Eric ULg; Lejeune, Robert ULg; Hubert, Philippe ULg

Learning material (2008)

Plusieurs vidéos (étalonnage des pipettes, argentimétrie: méthode de Fajans et argentimétrie: méthode de Mohr) illustrent les manipulations des travaux pratiques de 2ème Baccalauréat en Sciences ... [more ▼]

Plusieurs vidéos (étalonnage des pipettes, argentimétrie: méthode de Fajans et argentimétrie: méthode de Mohr) illustrent les manipulations des travaux pratiques de 2ème Baccalauréat en Sciences pharmaceutiques. [less ▲]

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See detailThe development of subordinate clauses in Old Swedish - an example of contact-induced language change?
Zeevaert, Ludger ULg

in Zanchi, Anna (Ed.) Skáldamjöðurinn. Selected proceedings of the UCL graduate symposia in Old Norse literature and philology, 2005-2006 (2008)

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See detailDiscrimination of parasitized aphids by a hoverfly predator: effects on larval performance, foraging, and oviposition behavior
Almohamad, Raki; Verheggen, François ULg; Francis, Frédéric ULg et al

in Entomologia Experimentalis et Applicata (2008), 128(1), 73-80

The choice of oviposition site by female aphidophagous predators is crucial for offspring performance, especially in hoverflies whose newly hatched larvae are unable to move over large distance. Predator ... [more ▼]

The choice of oviposition site by female aphidophagous predators is crucial for offspring performance, especially in hoverflies whose newly hatched larvae are unable to move over large distance. Predator and parasitoid interactions within the aphidophagous guild are likely to be very important in influencing the choices made by predatory hoverfly females. In the present study, the foraging and oviposition behavior of the aphidophagous hoverfly Episyrphus balteatus DeGeer (Diptera: Syrphidae) was investigated with respect to the parasitized state of its aphid prey, Acyrthosiphon pisum Harris (Homoptera: Aphididae), that were parasitized by Aphidius ervi Haliday (Hymenoptera: Aphidiidae). We also recorded the number of eggs laid by hoverfly females when subjected to parasitized aphids. Furthermore, we studied the influence of being fed with parasitized aphids on hoverfly larval performance. Hoverfly females did not exhibit any preference for plants infested with unparasitized or aphids parasitized for 7 days. On the other hand, plants infested with mummies or exuvia were less attractive for E. balteatus. These results were correlated with (i) the number of eggs laid by E. balteatus females and (ii) larval performance. Thus, our results demonstrate that E. balteatus behavior is affected by parasitoid presence through their exploitation of aphid colonies. Indeed, hoverfly predators select their prey according to the developmental state of the parasitoid larvae. [less ▲]

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See detailScience politique en Belgique francophone : Analyser la réalité contemporaine
Perrin, Nathalie ULg; Jacquemain, Marc ULg

Book published by Bruylant-Academia (2008)

La politologie francophone a connu une évolution marquée vers l’autonomie et la professionnalisation au cours des dernières décennies ; vers l’autonomie, d’une part, en se dégageant du droit, de la ... [more ▼]

La politologie francophone a connu une évolution marquée vers l’autonomie et la professionnalisation au cours des dernières décennies ; vers l’autonomie, d’une part, en se dégageant du droit, de la philosophie et des logiques normatives, pour développer une approche empirique de la réalité politique ; vers la professionnalisation, ensuite, par le développement d’un réseau de chercheurs professionnels, issus des universités ou, en France, des IEP. Dans le même temps, le champ politique s’est progressivement transformé, notamment par la multiplication des phénomènes émergents, qui échappent aux cadres institutionnels traditionnels, par la diversification du champ des politiques publiques, par l’irruption de nouvelles thématiques (le féminisme, l’environnement, le cosmopolitisme), par le déplacement de la frontière entre public et privé, par la dynamique de globalisation et de constitution de réseaux,etc. À travers six thématiques (méthodes, genre, migrations, action publique, relations internationales, engagement), ce livre, issu du congrès de l’Association Belge francophone de Science Politique (Liège, 2005), propose un état des lieux de la discipline dans notre pays et ouvre des perspectives sur l’avenir. Il propose une série de clefs de lecture du champ politique contemporain, clefs qui sont aujourd’hui d’abord des outils pour les chercheurs, mais qui seront demain des cadres d’interprétation disponibles pour les acteurs. [less ▲]

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See detailInfectious bovine rhinotracheitis and the epidemiological role of the other ruminant species
Thiry, Julien ULg; Muylkens, Benoît ULg; Thiry, Etienne ULg

in Magyar Allatorvosok Lapja = Hungarian Veterinary Journal (2008), 130(1), 116-123

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See detailReliures monastiques de la Vallée de la Meuse. L'activité des Croisiers de Huy et de Liège à la fin du Moyen Âge
Opsomer, Carmélia ULg

in Lanoë, Guy; Grand, Geneviève (Eds.) La reliure médiévale. Pour une description normalisée : actes du colloque international (Paris, 22-24 mai 2003) (2008)

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See detailKamennaya industriya verkhnego paleolita stoyanki Kulbulak
Kolobova, K.A.; Flas, Damien ULg; Islamov, U.I. et al

in Problems of archaeology, ethnography, and anthropology of Siberian and adjacent territories. : material of the 16th annual session of the Institute of Archaeology and Ethnography, SBRAS (2008)

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See detailAutonomie fiscale, péréquation et contrainte budgétaire des communes: de la théorie à la pratique
Jurion, Bernard ULg

in Reflets et Perspectives de la Vie Economique (2008), XLVII(4), 5-14

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See detailMethIS I : Réalité et Représentation
Cormann, Grégory ULg; Dozo, Björn-Olav ULg; Letawe, Céline ULg

Book published by Editions de l’Université de Liège (2008)

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See detailWhat makes Episyrphus balteatus (Diptera: Syrphidae) oviposit on aphid infested tomato plants?
Verheggen, François ULg; Capella, Quentin ULg; Wathelet, Jean-Paul ULg et al

in Communications in Agricultural and Applied Biological Sciences (2008), 73(3), 371-81

Under attack by insect pests, many plant species change their volatile chemical emissions to attract natural enemies. Most of the tomato (Lycopersicon sp., Solanaceae) varieties are subjected to ... [more ▼]

Under attack by insect pests, many plant species change their volatile chemical emissions to attract natural enemies. Most of the tomato (Lycopersicon sp., Solanaceae) varieties are subjected to infestation by molluscs and insects, including the generalist aphid Myzus persicae Sulzer (Homoptera, Aphididae). Episyrphus balteatus De Geer (Diptera: Syrphidae) is a generalist aphid predator that was here observed to lay eggs on M. persicae infested tomato but not on non-infested plants. In order to identify the volatile chemicals that guide the foraging and oviposition behaviour of E. balteatus, we collected and identified volatiles released in the headspace of both aphid infested and uninfested tomato plants by SPME-GC-MS. The identified chemicals were subsequently tested by electroantennography (EAG) on E. balteatus. Monoterpenes and sesquiterpenes were identified, the main volatile chemicals being beta-phellandrene, 2-carene, alpha-phellandrene, 3-carene and o-pinene. Electrical depolarizations were observed for each tested monoterpene, with optimal responses ranging from -0.2 to -0.8 mV. Episyrphus balteatus antennae showed dose-response relationships towards all the active chemicals. (E)-beta-farnesene, the main component of the aphid alarm pheromone, was the only active sesquiterpene, and is presumed to act as an oviposition stimulus for E. balteotus. [less ▲]

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See detailCopper bromide complexed by fluorinated macroligands: towards microspheres by ATRP of vinyl monomers in scCO2
Grignard, Bruno ULg; Jérôme, Christine ULg; Calberg, Cédric ULg et al

in Chemical Communications (2008), (3), 314-316

We report the successful synthesis of poly(methyl methacrylate) (PMMA) by atom transfer radical polymerization using a catalyst ligated to a polymeric ligand having a dual role, i.e., the complexation of ... [more ▼]

We report the successful synthesis of poly(methyl methacrylate) (PMMA) by atom transfer radical polymerization using a catalyst ligated to a polymeric ligand having a dual role, i.e., the complexation of the copper salt and the stabilization of the growing PMMA particles; at the end of the polymerization, the catalyst is removed by supercritical fluid extraction leading to PMMA microspheres with low residual catalyst content. [less ▲]

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See detailUn projet, un livre, le Ranch de Nazinga
Vermeulen, Cédric ULg

in Canal Zoom (Télévision locale) (Ed.) Un projet, un livre, le Ranch de Nazinga (2008)

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