Publications ORBi OA
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See detailEntomological diversity in agro-ecosystems : not necessarily an ecological desert
Francis, Frédéric ULg; Haubruge, Eric ULg; colignon, Pierre et al

in Bulletin de l’Institut Royal des Sciences naturelles de Belgique, Biologie, 72 : 153-154. (2002)

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See detailMesures agri-environnementales et biodiversité : effet des tournières enherbées sur les populations de syrphes en grandes cultures
Francis, Frédéric ULg; Devallée, Gilles; Terwagne, Sébastien et al

in 1. Annales de la 2ème Conférence Internationale sur les moyens alternatifs de lutte contre les organismes nuisibles aux végétaux (2002)

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See detailContinuité de la délinquance entre l’adolescence et l’âge adulte
Born, Michel ULg

in Criminologie (2002), 35(1), 53-67

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See detailThe co-operative movement in Belgium: Perspectives and prospects
Defourny, Jacques ULg; Adam, Sophie; Simon, Michel

Book published by Luc Pire (2002)

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See detailEchocardiographic evaluation of cardiac performance during stimulation with dobutamine in conscious horses: a preliminary study.
Sandersen, Charlotte ULg; Delguste, Catherine ULg; Becker, Martine et al

in Pflügers Archiv : European Journal of Physiology (2002), 444(1-2), 4

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See detailConception réalisation et test d'un support alternatif de cours : la technologie en ingéniorat de gestion
Degre, Aurore ULg

Master of advanced studies dissertation (2002)

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See detailImpact of closed habitat on the entomological diversity and abundance in carrot open fields
Colignon, Pierre; Gaspar, Charles; Haubruge, Eric ULg et al

in Med. Fac. Landbouw. Univ. Gent (2002), 67(3), 481-486

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See detailEffect of some insecticides on acetylcholinesterase from beneficial insects: Coccinella septempunctata, Chrysoperla carnea and Forficula auricularia
Boszic, Andras; Francis, Frédéric ULg; Gaspar, Charles et al

in Med. Fac. Landbouw. Univ. Gent (2002), 67(3), 671-677

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See detailThe use of random amplified polymorphic DNA (RAPD) analysis for studies of genetic variation in populations of Coccinella septempunctata in Belgium
Haubruge, Eric ULg; Vanlerberghe-Massuti, Flavie; Colignon, Pierre et al

in Med. Fac. Landbouw. Univ. Gent (2002), 67(3), 557-561

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See detailAphid prey suitability as environmental effect on Adalia bipunctata reproduction
Vanhaelen, Nicolas; Gaspar, Charles; Francis, Frédéric ULg

in Med. Fac. Landbouw. Univ. Gent (2002), 67(3), 563-568

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See detailLa mesure de la pression artérielle : écueils et chausse-trapes
Rorive, Georges ULg; Dubois, Bernard ULg; Saint-Remy, Annie ULg

in Revue Médicale de Liège (2002), 57(5), 250-252

La mesure de la pression artérielle est probablement l'acte médical le plus souvent réalisé et certainement un des moins fiables. L'introduction de la mesure ambulatoire de la pression artérielle a permis ... [more ▼]

La mesure de la pression artérielle est probablement l'acte médical le plus souvent réalisé et certainement un des moins fiables. L'introduction de la mesure ambulatoire de la pression artérielle a permis d'identifier l'importance de l'effet consultatio et, par là, de définir l'hypertension de "la blouse blanche". Celle-ci se définit comme une pression artérielle pathologique à la consultation et strictement normale en dehors. Si on la définit de cette manière, cette pathologie ne s'accompagne pas d'une augmentation de la fréqunce des affections cardiovasculaires. Chez un tiers des patients, cependant, elle évolue vers des formes plus sévères de l'hypertension. [less ▲]

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See detailPhylogeny of the genus Apodemus with a special emphasis on the subgenus Sylvaemus using the nuclear IRBP gene and two mitochondrial markers: cytochrome b and 12S rRNA.
Michaux, Johan ULg; Chevret, P.; Filippucci, M*-G et al

in Molecular Phylogenetics & Evolution (2002), 23(2), 123-36

Phylogenetic relationships among 17 extant species of Murinae, with special reference to the genus Apodemus, were investigated using sequence data from the nuclear protein-coding gene IRBP (15 species ... [more ▼]

Phylogenetic relationships among 17 extant species of Murinae, with special reference to the genus Apodemus, were investigated using sequence data from the nuclear protein-coding gene IRBP (15 species) and the two mitochondrial genes cytochrome b and 12S rRNA (17 species). The analysis of the three genes does not resolve the relationships between Mus, Apodemus, and Rattus but separates Micromys from these three genera. The analysis of the two mitochondrial regions supported an association between Apodemus and Tokudaia and indicated that these two genera are more closely related to Mus than to Rattus or Micromys. Within Apodemus, the mitochondrial data sets indicated that 8 of the 9 species analyzed can be sorted into two main groups: an Apodemus group, with A. agrarius, semotus, and peninsulae, and a Sylvaemus group, with uralensis, flavicollis, alpicola, sylvaticus, and hermonensis. The position of Apodemus mystacinus is ambiguous and might be either included in Sylvaemus or considered a distinct subgenus, Karstomys, more closely related to Sylvaemus than to Apodemus. Estimation of the divergence time for these taxa suggests a separation between 7 and 8 My ago for the three groups (mystacinus and the two subgenera Apodemus and Sylvaemus). Within each subgenus, divergence times are between 5.4 and 6 My for Apodemus and between 2.2 and 3.5 My for Sylvaemus and mystacinus. [less ▲]

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See detailSelf-esteem, social adjustment and suicidality in affective disorders
Daskalopoulou, E; Dikeos, D; Papadimitriou, G et al

in European Psychiatry (2002), 17

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See detailDust variability and land degradation in the Sahel
Ozer, Pierre ULg

in Belgeo (2002), 2002(2), 195-209

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See detailResponses and adaptations of Episyrphus balteatus and Adalia bipunctata to allelochemicals from Brassicaceae plant through their preys
Vanhaelen, Nicolas; Haubruge, Eric ULg; Gaspar, Charles et al

in 8th International Symposium on Ecology of Aphidophaga, Azores 2002. Proceeding abstract 68 (2002)

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See detailA role for the Clostridium perfringens beta 2 toxin in bovine enterotoxaemia?
Manteca, Christophe; Daube, Georges ULg; Jauniaux, Thierry ULg et al

in Veterinary Microbiology (2002), 86(3), 191-202

Non-enterotoxigenic type A Clostridium perfringens are associated with bovine enterotoxaemia, but the alpha toxin is not regarded as responsible for the production of typical lesions of necrotic and ... [more ▼]

Non-enterotoxigenic type A Clostridium perfringens are associated with bovine enterotoxaemia, but the alpha toxin is not regarded as responsible for the production of typical lesions of necrotic and haemorrhagic enteritis. The purpose of this study was to investigate the putative role of the more recently described beta2 toxin. Seven hundred and fourteen non-enterotoxigenic type A C. perfringens isolated from 133 calves with lesions of enterotoxaemia and high clostridial cell counts (study population) and 386 isolated from a control population of 87 calves were tested by a colony hybridisation assay for the beta2 toxin. Two hundred and eighteen (31%) C perfringens isolated from 83 calves (62%) of the study population and 113 (29%) C. perfringens isolated from 51 calves (59%) of the control population tested positive with the beta2 probe. Pure and mixed cultures of four C perfringens (one alpha+beta2+, one alpha+enterotoxin-1 and two alpha+) were tested in the ligated loop assay in one calf. Macroscopic haemorrhages of the intestinal wall, necrosis and haemorrhages of the intestinal content, and microscopic lesions of necrosis and polymorphonuclear and mononuclear cell infiltration of the intestinal villi were more pronounced in loops inoculated with the a and beta2-toxigenic C. perfringens isolate. These results suggest in vivo synergistic role of the alpha and beta2 toxins in the production of necrotic and haemorrhagic lesions of the small intestine in cases of bovine enterotoxaemia. However, isolation of beta2-toxigenic C. perfringens does not confirm the clinical diagnosis of bovine enterotoxaemia and a clostridial cell counts must still be performed. (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailAdhesion of synchronized human hematopoietic progenitor cells to fibronectin and vascular cell adhesion molecule-1 fluctuates reversibly during cell cycle transit in ex vivo culture.
Huygen, Sandra; Giet, Olivier ULg; Artisien, Vincent et al

in Blood (2002), 100(8), 2744-52

Ex vivo expansion of hematopoietic stem/progenitor cells may result in defective engraftment. Human cord blood CD34(+) progenitor cells were synchronized and assayed for adhesion and migration onto ... [more ▼]

Ex vivo expansion of hematopoietic stem/progenitor cells may result in defective engraftment. Human cord blood CD34(+) progenitor cells were synchronized and assayed for adhesion and migration onto fibronectin (Fn) and vascular cell adhesion molecule-1 (VCAM-1) at different stages of a first cell cycle executed ex vivo. During S phase transit, adhesion to Fn was transiently increased while binding to VCAM-1 was reversibly decreased, after which adhesion to both ligands returned to baseline levels with cell cycle completion. Transmigration across Fn and VCAM-1 decreased irreversibly during S phase progression. The function of alpha4 and alpha5 integrins was assessed with specific neutralizing antibodies. In uncultured CD34(+) cells and long-term culture-initiating cells (LTC-ICs), both adhesion and migration on Fn were inhibited by anti-alpha4 but not by anti-alpha5 antibodies. In mitotically activated CD34(+) cells and LTC-ICs, adhesion and migration on Fn were mainly dependent on alpha5 integrin and to a lesser extent on alpha4 integrin. Changes in integrin function were not dependent on parallel modulation of integrin expression. In conclusion, Fn and VCAM-1 binding of progenitor cells fluctuates reversibly during cell cycle transit ex vivo. In addition, our data show that mitogenic activation induces a shift from a dominant alpha4 to a preferential alpha5 integrin-dependent interaction with Fn. [less ▲]

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See detailIncreased binding and defective migration across fibronectin of cycling hematopoietic progenitor cells.
Giet, Olivier ULg; Van Bockstaele, Dirk R; Di Stefano, Ivano et al

in Blood (2002), 99(6), 2023-31

Engraftment of hematopoietic progenitor cells has been shown to decrease during cell cycle transit. We studied cell cycle-associated changes in adhesion and migration of mitotically activated cord blood ... [more ▼]

Engraftment of hematopoietic progenitor cells has been shown to decrease during cell cycle transit. We studied cell cycle-associated changes in adhesion and migration of mitotically activated cord blood CD34+ cells. Migration toward medium conditioned by the stromal-derived factor-1-producing cell line MS-5 was studied in bovine serum albumin- and fibronectin (Fn)-coated transwells. Migration was reduced in cycling CD34+ cells and long-term culture-initiating cells (LTC-ICs) compared with their noncycling counterparts across Fn but not across bovine serum albumin. Conversely, Fn binding was higher in cycling CD34+ cells and LTC-ICs compared with noncycling progenitor cells, while adhesion of both subsets to bovine serum albumin was undetectable. The contribution of alpha4 and alpha5 integrins in mediating adhesion and migration of activated CD34+ cells onto Fn was analyzed by neutralization experiments. While alpha4-mediated Fn binding decreased during G(2)/M, alpha5 integrin-mediated adhesion increased during transit from G(0)/G(1) to S and G(2)/M phases. As for migration, the contribution of alpha4 integrin was similar in all phases, whereas alpha5-directed migration was lower in G(2)/M compared with G(0)/G(1) and S phases. Defective migration of cycling CD34+ cells was not due to differences in alpha5 integrin expression. In conclusion, chemotaxis across Fn is less efficient in cycling progenitor cells in correlation with an increased Fn binding capacity. In addition, alpha4 and alpha5 integrin functions are independently modulated during cell cycle transit. [less ▲]

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