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See detailPredatory hoverflies select their oviposition site according to aphid host plant and aphid species
Almohamad, Raki; Verheggen, François ULg; Francis, Frédéric ULg et al

in Entomologia Experimentalis et Applicata (2007), 125(1), 13-21

The hoverfly Episyrphus balteatus De Geer (Diptera: Syrphidae) is an abundant and efficient aphid-specific predator. Several aphidophagous parasitoids and predators are known to respond positively to ... [more ▼]

The hoverfly Episyrphus balteatus De Geer (Diptera: Syrphidae) is an abundant and efficient aphid-specific predator. Several aphidophagous parasitoids and predators are known to respond positively to aphid-infested plants. Semiochemicals from the latter association usually mediate predator/parasitoid foraging behavior toward sites appropriate for offspring fitness. In this study, we investigated the effect of aphid host plant and aphid species on foraging and oviposition behavior of E. balteatus. Behavioral observations were conducted using the Noldus Observer v. 5.0, which allows observed insect behavior to be subdivided into different stages. Additionally, the influence of aphid species and aphid host plant on offspring fitness was tested in a second set of experiments. Acyrthosiphon pisum Harris and Megoura viciae Buckton were equally attractive for E. balteatus whereas Aphis fabae Scopoli (all Homoptera: Aphididae) were less attractive. These results were correlated with (i) the number of eggs laid, which was significantly higher for the two first aphid species, and (ii) the fitness of hoverfly larvae, pupae, and adults. Two solanaceous plant species, Solanum nigrum L. and Solanum tuberosum L. (Solanaceae), which were infested with Myzus persicae Sulzer (Homoptera: Aphididae), were also compared using the same approach. Discrimination between these two M. persicae host plants was observed, with S. tuberosum being preferred as an oviposition site by the predatory hoverfly. Larval and adult fitness was correlated with the behavioral observations. Our results demonstrated the importance of the prey-host plant association on the choice of the oviposition site by an aphid predator, which is here shown to be related to offspring fitness. [less ▲]

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See detailOverview of the Belgian Donor and Transplant Statistics 2006: Results of Consecutive Yearly Data Follow-up by the Belgian Section of Transplant Coordinators
Van Gelder, F.; Delbouille, Marie-Hélène ULg; Vandervennet, M. et al

in Transplantation Proceedings (2007), 39

Background. The Belgian Section of Transplant Coordinators, created in 1997 under the auspices of the Belgian Transplant Society, is in charge of the collection of the national data about donor ... [more ▼]

Background. The Belgian Section of Transplant Coordinators, created in 1997 under the auspices of the Belgian Transplant Society, is in charge of the collection of the national data about donor/procurement activities. Methods. Data are collected in all Belgian transplant centers. An annual report is finalized by combining these data with data from the Eurotransplant database. Results. An increase of both potential donors (n 501, 14.4%) and effective donors (n 273, 16.7%) was observed in 2006 versus 2005. Among effective donors, 28 were non–heart-beating donors (10.25%). Overall donor ratio was 26.26 donors per million inhabitants. Within potential donors, absence of organ harvesting was due to medical contraindications (28%), family refusal (13%), or legal refusal (2%). Donor mean age was 46.4 years and mean organs/donor was 3.21 1.7. An overall reduction of Belgian waiting lists was observed in 2006 as compared with 2005 ( 5.7% for kidney, 25.7% for liver, 9.4% for heart, 6.7% for lung, and 11.7% for pancreas), while waiting list mortality was 18% for liver, 11% for heart, and 7% for lung. As compared with 2005, transplant activities increased for kidney (n 485, 24.3%), heart lungs (n 73, 7.3%), and lungs (n 83, 39.4%) but decreased for liver (n 236, 2.1%). Living donation represented 8.45% for kidney ( 28.1% vs 2005) and 8% for liver transplantation ( 29.6%). Conclusion. Globally, a marked increase of procurement and transplant activities was observed in 2006, allowing to limit waiting list and waiting list mortality. Further increase of living donor activity and non–heart-beating donation remains necessary to extend the donor pool. [less ▲]

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See detailLinking flux network measurements to continental scale simulations: Ecosystem carbon dioxide exchange capacity under non-water-stressed conditions
Owen, Katherine; Tenhunen, John; Reichstein, Markus et al

in Global Change Biology (2007), 13

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See detailComment interpréter une élévation de la ferritine sérique?
Langlet, P.; Delwaide, Jean ULg

in Revue Médicale de Bruxelles (2007), 28(4), 265-269

The presence of hyperferritinemia has to rule out acquired causes such as chronic inflammatory disorders, hemolytic anemia, liver diseases as hepatitis B or C, alcohol abuse and non alcoholic fatty liver ... [more ▼]

The presence of hyperferritinemia has to rule out acquired causes such as chronic inflammatory disorders, hemolytic anemia, liver diseases as hepatitis B or C, alcohol abuse and non alcoholic fatty liver disease, specially in patients with normal transferrine saturation. Genetic testing for hemochromatosis is systematically indicated in all patients with elevated transferrine saturation. When an iron overload is demonstrated in the absence of these classic causes, second-line genetic testing should be considered to exclude non HFE hemochromatosis. The aim of this paper is to propose a practical algorithm in the diagnosis of hyperferritinemia and to precise the diagnostic and therapeutic management of genetic hemochromatosis. [less ▲]

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See detailRethinking Flexicurity at the Level of Work Situations
Pichault, François ULg; Xhauflair, Virginie ULg

in Madsen, P. K.; Jorgensen, H. (Eds.) Flexicurity and Beyond. Finding a New Agenda for the European Social Model (2007)

Proposes new landmarks for balancing flexibility and security requirements in a context of interorganizational parnerships

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See detailParametric conditional mean and variance testing with censored data
Heuchenne, Cédric ULg; González Manteiga, Wenceslao; Sanchez Sellero, Cesar

in ASMDA2007 Proceedings (2007)

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See detailLa Cour constitutionnelle, juge de l'administration
Lewalle, Paul ULg

in En hommage à Francis Delpérée, itinéraires d'un constitutionnaliste (2007)

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See detailLes ‘réfugiées de l’intérieur’. Excision et mariage précoce contraint entre la France et le Mali
Razy, Elodie ULg

in Freedman, J. et Valluy, J. ed. (Ed.) Persécutions des femmes. Savoirs, mobilisations, protections (2007)

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See detailManagement and treatment of chronic hepatitis B virus: Belgian Association for the Study of the Liver (BASL) 2007 guidelines
Colle, I.; Adler, M.; Brenard, R. et al

in Acta Gastro-Enterologica Belgica (2007), 70(4), 389-420

1. Introduction Chronic hepatitis B virus (HBV) infection currently affects about 400 million people and is responsible for 500,000 to 1,000,000 deaths annually worldwide from cirrhosis and hepatocellular ... [more ▼]

1. Introduction Chronic hepatitis B virus (HBV) infection currently affects about 400 million people and is responsible for 500,000 to 1,000,000 deaths annually worldwide from cirrhosis and hepatocellular carcinoma (HCC) (1). For this reason, screening high risk populations to identify HBV infected persons is important so that guidelines for treatment and prevention of transmission can be given in this specific group. Recently, new drugs became available for HBV and new insights in resistance and definitions came up. So, the purpose of this paper is providing an update of the recent literature and guidelines concerning 1. screening for chronic hepatitis B (CHB) 2. management of patients with CHB 3. treatment of CHB in mono-infected patients and in special patient populations (co-infected, transplanted and immunosuppressed patients). The recommendations are based onpublished information and the level of evidence is reported with each recommendation. The level of evidence is graded as :grade 1 : randomized controlled trials ; grade II-1 : controlled trials without randomization ; grade 11-2 : cohort or case-control analytic study ; grade 11-3 : multiple time series, dramatic uncontrolled experiments ; grade III : descriptive epidemiology, expert opinions. [less ▲]

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See detailIntrinsic pro-angiogenic status of cystic fibrosis airway epithelial cells
Verhaeghe, Catherine ULg; Tabruyn, Sébastien ULg; Oury, Cécile ULg et al

in Biochemical and Biophysical Research Communications (2007), 356(3), 745-749

Cystic fibrosis is a common genetic disorder characterized by a severe lung inflammation and fibrosis leading to the patient's death. Enhanced angiogenesis in cystic fibrosis (CF) tissue has been ... [more ▼]

Cystic fibrosis is a common genetic disorder characterized by a severe lung inflammation and fibrosis leading to the patient's death. Enhanced angiogenesis in cystic fibrosis (CF) tissue has been suggested, probably caused by the process of inflammation, as similarly described in asthma and chronic bronchitis. The present study demonstrates an intrinsic pro-angiogenic status of cystic fibrosis airway epithelial cells. Microarray experiments showed that CF airway epithelial cells expressed several angiogenic factors such as VEGF-A, VEGF-C, bFGF, and PLGF at higher levels than control cells. These data were confirmed by real-time quantitative PCR and, at the protein level, by ELISA. Conditioned media of these cystic fibrosis cells were able to induce proliferation, migration and sprouting of cultured primary endothelial cells. This report describes for the first time that cystic fibrosis epithelial cells have an intrinsic angiogenic activity. Since excess of angiogenesis is correlated with more severe pulmonary disease, our results could lead to the development of new therapeutic applications. (c) 2007 Elsevier Inc. All rights reserved. [less ▲]

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See detailPréface
Pichault, François ULg

in Verstraeten, Michel (Ed.) Consultants en organisation. Stratégies et pratiques de l’intervention (2007)

Highlights the relevance of a sociological approach of the consulting process

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See detailLes restructurations et les nouveaux périmètres organisationnels : le rôle de la fonction RH
Pichault, François ULg; Rorive, Brigitte

in Allouche, José; Freiche, Janine (Eds.) Restructurations d’entreprise: regards croisés (2007)

Studies the new role of HR managers in an open context characterized by a growing interdependence between several organizations (network forms)

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See detailCaroline Spurgeon and her Relationship to Chaucer. The Text of her Viva Presentation at the Sorbonne
Dor, Juliette ULg

in Summerfield, Théa; Busby, Keith (Eds.) People and Texts. Relationships in Medieval Literature (2007)

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See detailLes bêtabloquants sont-ils encore des medicaments de premier choix pour le traitement de l'hypertension arterielle non compliquee?
Krzesinski, Jean-Marie ULg; Saint-Remy, Annie ULg

in Revue Médicale de Liège (2007), 62(5-6, May-Jun), 254-7

Arterial hypertension is a significant risk factor for cardiovascular disease, proportional to the blood pressure level. Treating hypertension reduces the risk. Until recently, beta-blockers were ... [more ▼]

Arterial hypertension is a significant risk factor for cardiovascular disease, proportional to the blood pressure level. Treating hypertension reduces the risk. Until recently, beta-blockers were considered as a first line class for hypertension management. The British Hypertension Society has recently pronounced that using beta-blockers as first line antihypertensive therapy is no good choice since these agents are less protective than other antihypertensive classes against cardiovascular disorders and diabetes mellitus, especially when used in association with diuretics. [less ▲]

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See detailRésumé C.E. n°170.235, du 19 avril 2007, Bellin et Molitor
Delnoy, Michel ULg

in Aménagement - Environnement (2007), 4

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See detailManipulation of the vortex motion in nanostructured ferromagnetic/superconductor hybrids
Silhanek, Alejandro ULg; Gillijns, W.; Moshchalkov, V. V. et al

in Applied Physics Letters (2007), 90(18),

The authors investigate the rectified motion of vortices in superconducting films deposited on top of a close-packed array of open in-plane magnetized triangular micromagnets. The dc voltage induced by ... [more ▼]

The authors investigate the rectified motion of vortices in superconducting films deposited on top of a close-packed array of open in-plane magnetized triangular micromagnets. The dc voltage induced by the vortex drift under an ac excitation is recorded for three different magnetic configurations of the triangles. When the magnetic elements are in the as-grown state a rectification signal which reverses sign when the field changes polarity is observed. In contrast to that, when the array of triangles is magnetized the observed rectification effect is independent of the field polarity and can be reverted by reorienting the magnetization of the micromagnets. (C) 2007 American Institute of Physics. [less ▲]

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See detailHuman gene organization driven by the coordination of replication and transcription
Huvet, Maxime; Nicolay, Samuel ULg; Touchon, Marie et al

in Genome Research (2007), 17(9), 1278-1285

In this work, we investigated a large-scale organization of the human genes with respect to putative replication origins. We developed an appropriate multiscale method to analyze the nucleotide ... [more ▼]

In this work, we investigated a large-scale organization of the human genes with respect to putative replication origins. We developed an appropriate multiscale method to analyze the nucleotide compositional skew along the genome and found that in more than one-quarter of the genome, the skew profile presents characteristic patterns consisting of successions of N-shaped structures, designated here N-domains, bordered by putative replication origins. Our analysis of recent experimental timing data confirmed that, in a number of cases, domain borders coincide with replication initiation zones active in the early S phase, whereas the central regions replicate in the late S phase. Around the putative origins, genes are abundant and broadly expressed, and their transcription is co-oriented with replication fork progression. These features weaken progressively with the distance from putative replication origins. At the center of domains, genes are rare and expressed in few tissues. We propose that this specific organization could result from the constraints of accommodating the replication and transcription initiation processes at chromatin level, and reducing head-on collisions between the two machineries. Our findings provide a new model of gene organization in the human genome, which integrates transcription, replication, and chromatin structure as coordinated determinants of genome architecture. [less ▲]

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See detailFeline herpesvirus
Gaskell, Rosalind; Dawson, Susan; Radford, Alan et al

in Veterinary Research (2007), 38(2, FEB-MAR), 337-354

Feline herpesvirus (FHV-1; felid herpesvirus 1 (FeHV-1)) is an alphaherpesvirus of cats closely related to canine herpesvirus-1 and phocine herpesvirus-1. There is only one serotype of the virus and it is ... [more ▼]

Feline herpesvirus (FHV-1; felid herpesvirus 1 (FeHV-1)) is an alphaherpesvirus of cats closely related to canine herpesvirus-1 and phocine herpesvirus-1. There is only one serotype of the virus and it is relatively homogenous genetically. FeHV-1 is an important cause of acute upper respiratory tract and ocular disease in cats. In addition, its role in more chronic ocular disease and skin lesions is increasingly being recognised. Epidemiologically, FeHV-1 behaves as a typical alphaherpesvirus whereby clinically recovered cats become latently infected carriers which undergo periodic episodes of virus reactivation, particularly after a stress. The primary site of latency is the trigeminal ganglion. Conventional inactivated and modified-live vaccines are available and protect reasonably well against disease but not infection, although viral shedding may be reduced. Genetically engineered vaccines have also been developed, both for FeHV-1 and as vector vaccines for other pathogens, but none is as yet marketed. [less ▲]

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See detailExperimentally induced epizootic rabbit enteropathy: Clinical, histopathological, ultrastructural, bacteriological and haematological findings
Dewrée, Roxane; Meulemans, L.; Lassence, Cédric ULg et al

in World Rabbit Science (2007), 15(2, APR-JUN), 91-102

Epizootic rabbit enteropathy is an emerging disease that has appeared in French intensive enclosed rabbit farms since the beginning of 1997. Common clinical signs are mild watery diarrhoea with ... [more ▼]

Epizootic rabbit enteropathy is an emerging disease that has appeared in French intensive enclosed rabbit farms since the beginning of 1997. Common clinical signs are mild watery diarrhoea with considerable distension of the abdomen. At necropsy, a significant dilation of the stomach and small intestine without gross evidence of acute or chronic enteric lesions (inflammation or congestion) was observed. The purpose of this study was to describe the anatomopathologic changes concerning the small intestine and those concerning the blood profile, in experimentally infected rabbits. In a first part of the experiment, thirty animals were inoculated with a reference inoculum and five were kept as controls for clinical signs examination and histopathological study. In a second part, 17 out of the inoculated rabbits and the 5 controls animals were randomly assigned to blood testing. Microscopic lesions were studied in sections from the different parts of the small intestine (duodenum, jejunum and ileum) by light microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The histological findings revealed only limited inflammation in inoculated animals. Major villous changes were atrophy, fusion, destruction and loss of epithelial cells. In inoculated rabbits, the congestion and dilation of blood vessels of jejunal lamina propria were significantly higher than in control animals (P<0.005). There was significantly more (P<0.05) apoptosis of cells of the jejunal epithelium in inoculated rabbits than in control animals. Infiltration of polymorphonuclear neutrophiles was observed into the jejunal or ileal tunica muscularis. SEM performed on the intestinal tract of 15 inoculated rabbits revealed blankets and globular particles of mucus associated with numerous bacteria on jejunum and ileum villi. This was; not observed in the intestinal tract of control rabbits. Bacteria were found adhering to the epithelial surface and inside intestinal epithelial cells in a few animals by TEM and by light microscopy after Warthin-Starry staining. None of the bacteria isolated from the intestinal mixed contents and cultivated on usual media, are commonly known as rabbit's pathogens. Regarding the haernatological profile, neutrophil counts significantly increased (P<0.05) and lymphocyte counts significantly decreased (P<0.01), in inoculated rabbits compared to those of the control group. [less ▲]

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