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See detailOpen flux estimates in Saturn's magnetosphere during the January 2004 Cassini-HST campaign, and implications for reconnection rates
Badman, S. V.; Bunce, E. J.; Clarke, J. T. et al

in Journal of Geophysical Research. Space Physics (2005), 110(A11),

During 8-30 January 2004, a sequence of 68 UV images of Saturn's southern aurora was obtained by the Hubble Space Telescope (HST), coordinated for the first time with measurements of the upstream ... [more ▼]

During 8-30 January 2004, a sequence of 68 UV images of Saturn's southern aurora was obtained by the Hubble Space Telescope (HST), coordinated for the first time with measurements of the upstream interplanetary conditions made by the Cassini spacecraft. Using the poleward edge of the observed aurora as a proxy for the open-closed field line boundary, the open flux content of the southern polar region has been estimated. It is found to range from similar to 15 to similar to 50 GWb during the interval, such a large variation providing evidence of a significant magnetospheric interaction with the solar wind, in particular with the interplanetary structures associated with corotating interaction regions (CIRs). The open flux is found to decline slowly during a rarefaction region in which the interplanetary magnetic field remained very weak, while decreasing sharply in association with the onset of CIR-related solar wind compressions. Such decreases are indicative of the dominating role of open flux closure in Saturn's tail during these intervals. Increases in open flux are found to occur in the higher-field compression regions after the onsets, and in a following rarefaction region of intermediate field strength. These increases are indicative of the dominating role of open flux production at Saturn's magnetopause during these intervals. The rate of open flux production has been estimated from the upstream interplanetary data using an empirical formula based on experience at Earth, with typical values varying from similar to 10 kV during the weak-field rarefaction region, to similar to 200 kV during the strong-field compression. These values have been integrated over time between individual HST image sets to estimate the total open flux produced during these intervals. Comparison with the changes in open flux obtained from the auroral images then allows us to estimate the amount of open flux closed during these intervals, and hence the averaged tail reconnection rates. Intermittent intervals of tail reconnection at rates of similar to 30-60 kV are inferred in rarefaction regions, while compression regions are characterised by rates of similar to 100-200 kV, these values representing averages over the similar to 2-day intervals between HST image sequences. [less ▲]

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See detailÉduquer à la citoyenneté : quelle citoyenneté ?
Geuens, Geoffrey ULg

Conference given outside the academic context (2005)

Atelier d'éducation aux médias

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See detailLe multiculturalisme et les démocraties libérales
Martiniello, Marco ULg

Scientific conference (2005, November 18)

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See detailDemonstration by flow cytometry that CD5+CD8+ cells carry alcelaphine herpesvirus 1 in inoculated rabbits developing malignant catarrhal fever
Dewals, Benjamin G ULg; Gillet, Laurent ULg; Vanderplasschen, Alain ULg

Poster (2005, November 18)

Alcelaphine herpesvirus 1 (AlHV 1), carried by wildebeest (Connochaetes taurinus) asymptomatically, causes malignant catarrhal fever (MCF) when cross species transmitted to a variety of susceptible ... [more ▼]

Alcelaphine herpesvirus 1 (AlHV 1), carried by wildebeest (Connochaetes taurinus) asymptomatically, causes malignant catarrhal fever (MCF) when cross species transmitted to a variety of susceptible species of the Artiodactyla order. MCF is a fascinating disease described as a combination of lymphoproliferative and degenerative lesions. The study of MCF pathogenesis has been impeded by an inability to produce recombinant virus, due mainly to the fact that AlHV 1 becomes attenuated during passage in culture. Here, we have overcome these difficulties by (i) cloning the entire AlHV 1 genome as a stable, infectious and pathogenic bacterial artificial chromosome (BAC), and (ii) by using prokaryotic recombination technology for the production of an AlHV 1 recombinant. Firstly, the AlHV 1 genome was BAC cloned using one insertion site in a region containing no open reading frame. This insertion allowed the production of an AlHV 1 BAC clone stably maintained in bacteria and able to regenerate virions when transfected into permissive cells. BAC derived AlHV 1 virions induced MCF in rabbits comparably to the AlHV 1 wild type (WT) strain. Secondly, a two step mutagenesis procedure in E. coli was used to generate a recombinant strain expressing enhanced-green fluorescent protein (EGFP) as a reporter gene. After reconstitution of recombinant virions into permissive cells and excision of the BAC cassette, flow cytometry analyses were performed to validate the recombinant strain and to investigate the pathogenesis of MCF. The results of these analyses can be summarized as follows: (i) the validity of the EGFP expression cassette as a reporter gene has been demonstrated by in vitro infections; (ii) inoculation of rabbits revealed that the recombinant strain has retained the pathogenicity of its parental strain and that the cell types carrying AlHV-1 in peripheral blood mononuclear cells, lymph nodes and the spleen are mainly CD5+ CD8+ cells. [less ▲]

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See detailLes morales de Sartre, une logique de l’erreur ?
Cormann, Grégory ULg

Conference (2005, November 18)

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See detailFlow Cytometry for the follow-up of Trypanosoma evansi infection in a mouse model
Antoine-Moussiaux, Nicolas ULg; Leroy, ; Faisca, et al

Poster (2005, November 18)

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See detailDans le Gyron de Marguerite de Croÿ, comtesse de Lalaing (1508-1549)
Adam, Renaud ULg

Scientific conference (2005, November 18)

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See detailGlobalisation, communication et pouvoir
Geuens, Geoffrey ULg

Scientific conference (2005, November 18)

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See detailTerritoires et développement durable
Halleux, Jean-Marie ULg; Larrue, Corine; Ruegg, Jean

Conference (2005, November 18)

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See detailOrdre et complexité en poésie : “La Pente de la rêverie” de Victor Hugo
Durand, Pascal ULg

Conference given outside the academic context (2005)

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See detailMaîtrise par la méthode HACCP: exemples pratiques
de Biourge, Sandrine; Delacharlerie, Sophie ULg

Conference given outside the academic context (2005)

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See detailLe mur d'enceinte du temple d'Amon-Rê à Karnak
Winand, Jean ULg

Scientific conference (2005, November 17)

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See detailPrevention of perinatal group B streptococcak diseases: update and guidelines
MELIN, Pierrette ULg

in Ducoffre, Geneviève (Ed.) Program and Abstracts book of 2005 Symposium of ISP (2005, November 17)

Face à l’importance et à la gravité des infections périnatales à streptocoques du groupe B (GBS), depuis dix ans, différentes approches préventives ont été proposées. Le point commun est l’administration ... [more ▼]

Face à l’importance et à la gravité des infections périnatales à streptocoques du groupe B (GBS), depuis dix ans, différentes approches préventives ont été proposées. Le point commun est l’administration intraveineuse d’antibiotiques pendant le travail et l’accouchement aux patientes identifiées « à risque » soit par un dépistage de colonisation maternelle pendant la grossesse, soit par la présence de facteurs de risque définis. En 2002, après quelques années d’implémentation et d’adoption des recommandations éditées par le CDC (Centers for Diseases Control and Prevention, Atlanta, USA) en 1996, différentes études ont évalué l’efficacité des alternatives et ont démontré pour différentes raisons, la supériorité du dépistage pendant la grossesse pour l’identification des mères « à risque ». C’est pourquoi, en août 2002, le CDC publiait une version révisée des recommandations en proposant un dépistage universel, c'est-àdire de TOUTES les femmes enceintes. Parallèlement d’autres pays, notamment la France et la Belgique, évaluaient aussi l’efficacité et la faisabilité de différentes stratégies plus ou moins proches de celles du CDC. Depuis juillet 2003, les recommandations belges « Prevention of Perinatal Group B streptococcal Infections. Guidelines from the Belgium Health Council . (SHC. 721) » sont disponibles sur le site du CSH : (http://www.health.fgov.be/CSH_HGR/Francais/Brochures/GBS_2003.pdf et http://www.health.fgov.be/CSH_HGR/Nederlands/Brochures/GBS_2003.pdf). Ces recommandations sont très proches de celles du CDC moyennant quelques adaptations techniques et de prises en charge des nouveau-nés et, qui devraient en améliorer l’efficacité. Ces recommandations belges seront présentées et discutées. L’efficacité optimale attendue de ces recommandations est une réduction de 75% des cas d’infection néonatale précoce confirmés par culture. Pour atteindre cet objectif, la communication et une coordination multidisciplinaires sont indispensables entre le service de gynécologie-obstétrique, le laboratoire, le bloc d’accouchement et le service de néonatologie. [less ▲]

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See detailRelations aux non-humains et transformations épistémologiques
Strivay, Lucienne ULg

Scientific conference (2005, November 17)

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See detailStudy of neuronal preconditionning by ESR
Guelluy, Pierre-Henri ULg; Mouithys-Mickalad, Ange ULg; Deby, Ginette et al

Scientific conference (2005, November 17)

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See detailValeurs de référence: comment les établir? Comment les vérifier?
Chapelle, Jean-Paul ULg; Libeer, J. C.

Conference (2005, November 17)

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See detailContinuous aortic flow augmentation - A pilot study of hemodynamic and renal responses to a novel percutaneous intervention in decompensated heart failure
Konstam, M. A.; Czerska, B.; Bohm, M. et al

in Circulation (2005), 112(20), 3107-3114

Background - Diminished aortic flow may induce adverse downstream vascular and renal signals. Investigations in a heart failure animal model have shown that continuous aortic flow augmentation ( CAFA ... [more ▼]

Background - Diminished aortic flow may induce adverse downstream vascular and renal signals. Investigations in a heart failure animal model have shown that continuous aortic flow augmentation ( CAFA) achieves hemodynamic improvement and ventricular unloading, which suggests a novel therapeutic approach to patients with heart failure exacerbation that is inadequately responsive to medical therapy. Methods and Results - We studied 24 patients ( 12 in Europe and 12 in the United States) with heart failure exacerbation and persistent hemodynamic derangement despite intravenous diuretic and inotropic and/or vasodilator treatment. CAFA ( mean +/- SD 1.34 +/- 0.12 L/min) was achieved through percutaneous ( n = 19) or surgical ( n = 5) insertion of the Cancion system, which consists of inflow and outflow cannulas and a magnetically levitated and driven centrifugal pump. Hemodynamic improvement was observed within 1 hour. Systemic vascular resistance decreased from 1413 +/- 453 to 1136 +/- 381 dyne (.) s (.) cm(-5) at 72 hours ( P = 0.0008). Pulmonary capillary wedge pressure decreased from 28.5 +/- 4.9 to 19.8 +/- 7.0 mm Hg ( P < 0.0001), and cardiac index ( excluding augmented aortic flow) increased from 1.97 +/- 0.44 to 2.27 +/- 0.43 L (.) min(-1) (.) m(-2) ( P = 0.0013). Serum creatinine trended downward during treatment ( overall P = 0.095). There were 8 complications during treatment, 7 of which were self-limited. Hemodynamics remained improved 24 hours after CAFA discontinuation. Conclusions - In patients with heart failure and persistent hemodynamic derangement despite intravenous inotropic and/or vasodilator therapy, CAFA improved hemodynamics, with a reduction in serum creatinine. CAFA represents a promising, novel mode of treatment for patients who are inadequately responsive to medical therapy. The clinical impact of the observed hemodynamic improvement is currently being explored in a prospective, randomized, controlled trial. [less ▲]

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See detailCassini UVIS observations of Jupiter's auroral variability
Pryor, Wayne R.; Stewart, A. Ian F.; Esposito, Larry W. et al

in Icarus: International Journal of Solar System Studies (2005), 178(2), 312-326

The Cassini spacecraft Ultraviolet Imaging Spectrograph (UVIS) obtained observations of Jupiter's auroral emissions in H-2 band systems and H Lyman-alpha from day 275 of 2000 (October 1), to day 81 of ... [more ▼]

The Cassini spacecraft Ultraviolet Imaging Spectrograph (UVIS) obtained observations of Jupiter's auroral emissions in H-2 band systems and H Lyman-alpha from day 275 of 2000 (October 1), to day 81 of 2001 (March 22). Much of the globally integrated auroral variability measured with UVIS can be explained simply in terms of the rotation of Jupiter's main auroral arcs with the planet. These arcs were also imaged by the Space Telescope Imaging Spectrograph (STIS) on Hubble Space Telescope (HST). However, several brightening events were seen by UVIS in which the global auroral output increased by a factor of 2-4. These events persisted over a number of hours and in one case can clearly be tied to a large solar coronal mass ejection event. The auroral UV emissions from these bursts also correspond to hectometric radio emission (0.5-16 MHz) increases reported by the Galileo Plasma Wave Spectrometer (PWS) and Cassim Radio and Plasma Wave Spectrometer (RPWS) experiments. In general, the hectometric radio data vary differently with longitude than the UV data because of radio wave beaming effects. The 2 largest events in the UVIS data were on 2000 day 280 (October 6) and on 2000 days 325-326 (November 20-21). The global brightening events on November 20-21 are compared with corresponding data on the interplanetary magnetic field, solar wind conditions, and energetic particle environment. ACE (Advanced Composition Explorer) solar wind data was numerically propagated from the Earth to Jupiter with an MHD code and compared to the observed event. A second class of brief auroral brightening events seen in HST (and probably UVIS) data that last for similar to 2 min is associated with aurora] flares inside the main auroral ovals. On January 8, 2001, from 18:45-19:35 UT UVIS H-2 band emissions from the north polar region varied quasiperiodically. The varying emissions, probably due to amoral flares inside the main auroral oval, are correlated with low-frequency quasiperiodic radio bursts in the 0.6-5 kHz Galileo PWS data. (c) 2005 Elsevier Inc. All rights reserved. [less ▲]

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See detailDisrupting the melanin-concentrating hormone receptor 1 in mice leads to cognitive and NMDA response deficit
Grisar, Thierry ULg; Adamantidis, Antoine ULg; Thomas, Elizabeth et al

in Journal of the Neurological Sciences (2005, November 15), 238(Suppl. 1), 288

Detailed reference viewed: 56 (19 ULg)