References of "2011"
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See detailImmununoassay using a biofunctionnalized alumina-coated capacitive biosensor: towards a microfluidic detection of the h5n1 influenza virus
Overstraeten-Schlögel, Nancy; Dupuis, Pascal; Lefévre, Olivia et al

Scientific conference (2011, December 02)

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See detailMultiscale modeling of sprouting angiogenesis
Carlier, Aurélie ULg; Geris, Liesbet ULg; Van Oosterwyck, Hans

Poster (2011, December 02)

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See detailEcological characterization of Lophira alata (Ekki), a vulnerable timber tree species, in order to develop silvicultural effective strategies
Biwole, Achille ULg; Doucet, Jean-Louis ULg

Poster (2011, December 02)

Ekki, Lophira alata Banks ex C.F.Gaertn., is an African timber species occurring in tropical rainforests. Of important commercial value, this species is logged for its excellent timber properties and has ... [more ▼]

Ekki, Lophira alata Banks ex C.F.Gaertn., is an African timber species occurring in tropical rainforests. Of important commercial value, this species is logged for its excellent timber properties and has been classified by the IUCN as «vulnerable" species. As for many other tropical tree species, the commercial exploitation of Ekki is confronted to an insufficient knowledge about the species’ ecological profile. With a distribution range limited to the Guinea-Congolian region, Ekki often displays insufficient natural regeneration, but the biotic and abiotic factors explaining this deficiency have been hardly characterized. This lack of knowledge makes it difficult to model the population dynamics on the long term. The reproductive biology of Ekki and the genetic variability of its population remains poorly studied too. To address this situation, a fundamental and applied research is being undertaken in the forest concessions managed by Wijma Cameroun SA., covering over 250,000 hectares of rainforest in Southern Cameroon. This study aims to answer four essential questions: (1) what is the phylogenetic relationship between L. alata and L. lanceolata, (2) how paleoclimate and human disturbances impact its distribution and abundance, (3) how to these populations respond to logging over several rotation periods, (4) does logging promote or inhibit the natural regeneration of the species. Several study devices have thus been installed to collect the data needed to improve the characterization of Ekki’s ecology and to conceive silvicultural strategies. [less ▲]

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See detailA Brain-Machine Interface with an Innovative Spiking Neural Network Decoder
Dethier, Julie ULg; Nuyujukian, Paul; Elassaad, Shauki A. et al

Poster (2011, December 02)

Motor prostheses aim to restore functions lost to neurological disease and injury by translating neural signals into control signals for prosthetic limbs. Despite compelling proof of concept systems ... [more ▼]

Motor prostheses aim to restore functions lost to neurological disease and injury by translating neural signals into control signals for prosthetic limbs. Despite compelling proof of concept systems, barriers to clinical translation—mainly strict power dissipation constraints—still remain. The proposed solution is to use the ultra-low-power neuromorphic approach to potentially meet these constraints. [less ▲]

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See detailCatégorisations autour de la figure du « travailleur rural » dans le Delta de la Rivière des Perles. Luttes hégémoniques, légitimation et identifications.
Florence, Eric ULg

Conference (2011, December 02)

Les pratiques de catégorisation juridico-bureaucratique, mais aussi rhétorique occupent une place centrale au niveau des processus de constitution et de réinvention continuelle des Etats-nations comme les ... [more ▼]

Les pratiques de catégorisation juridico-bureaucratique, mais aussi rhétorique occupent une place centrale au niveau des processus de constitution et de réinvention continuelle des Etats-nations comme les travaux de nombreux historiens l’ont montré. Aujourd’hui encore, la production et la circulation de catégories de l’altérité comme « immigré », « réfugié », « sans papier », « clandestin », « jeune des banlieues », etc. peuvent être pensées en rapport avec la constitution du « citoyen national » ainsi qu’avec valeurs et principes qui lui sont associés. Ces pratiques de catégorisation de la population participent de processus d’institution de relations de pouvoir. Ils touchent aux questions de construction sans cesse renouvelée de la légitimité des Etats, mais aussi au processus d’identification des groupes concernés. Cette problématique et cette dialectique « légitimation-identification » est particulièrement intéressante à étudier dans le cas des travailleurs d’origine rurale en République populaire de Chine. On s’intéressera à ces pratiques et luttes autour des catégories de discours car celles-ci participent, de configurations complexes d’institutions, de pratiques de contrôle social et de gouvernement. Ces catégorisations sont tour à tour le produit de ces configurations tout comme elles les constituent. Dans notre exposé, à travers une confrontation entre différents matériaux (presse, littérature migrante, chansons, entretiens, etc.), nous nous pencherons sur les relations de pouvoir et les luttes que recèle la catégorie de dagong (打工). Nous montrerons qu’elle cristallise tout un réseau de principes et de valeurs centraux dans la société chinoise post-maoïste et que la figure du « travailleur rural » (dagongzhe) concentre sur elle un champ normatif très dense. Nous nous poserons également la question de savoir quels outils conceptuels utiliser afin d’appréhender ces processus. [less ▲]

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See detailVitamin D measurement: Laboratory issues
CAVALIER, Etienne ULg

Conference (2011, December 02)

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See detailDystocies équines: Données descriptives et approche de la gestion des soins intensifs
Deleuze, Stefan ULg; de la Rebière de Pouyade, Geoffroy ULg; Sandersen, Charlotte ULg et al

Conference (2011, December 02)

La fréquence de fourbures rencontrées après une dystocie semble faible par rapport à la littérature. L’ajout d’héparines fractionnées aux traitements habituels de la métrite du post-partum (ocytocine ... [more ▼]

La fréquence de fourbures rencontrées après une dystocie semble faible par rapport à la littérature. L’ajout d’héparines fractionnées aux traitements habituels de la métrite du post-partum (ocytocine, lavage utérins, antibiotiques et anti-inflammatoires) semble intéressant pour réduire le risque de fourbure. [less ▲]

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See detailEffects of temperature on pacemaker activity induced by mechano-electric feedback in a one-dimensional model of a ring-shaped cardiac fiber
Collet, Arnaud ULg; Desaive, Thomas ULg; Dauby, Pierre ULg

in NCBME (Ed.) 10th Belgian Day on Biomedical Engineering (2011, December 02)

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See detailThe Solar Sail Materials (SSM) project – Status of activities
Della Vedova, Florio; Henrion, Didier; Leipold, Manfred et al

in Advances in Space Research (2011), 48(11), 1922-1926

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See detailLa production de biohydrogène à partir de substrats carbohydratés : état de l'art
Hiligsmann, Serge ULg; Beckers, Laurent ULg; Masset, Julien ULg et al

in Récents progrès en génie des procédés (2011, December 01)

Hydrogen is being considered as an ideal and clean energy carrier. The recent advances to produce biohydrogen from renewable sources such as biomass and particularly by fermentation of carbohydrate-rich ... [more ▼]

Hydrogen is being considered as an ideal and clean energy carrier. The recent advances to produce biohydrogen from renewable sources such as biomass and particularly by fermentation of carbohydrate-rich substrates from agriculture and agro-industries appear promising. Such a process enables both organic waste treatment and renewable energy production to be coupled. The paper presents the state of the art about the different hydrogen-producing microorganisms and the parameters that have been investigated in order to improve the hydrogen production yields and rates. [less ▲]

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See detailOpening the door is not sufficient : each child has rights to take part in the everyday life of an ECEC service
Camus, Pascale ULg

Conference (2011, December 01)

Despite the fact that Belgium has ratified the UN Convention on the Rights of the Child in 1992, few children with special needs are taken care of in mainstream services. When they have access to a ... [more ▼]

Despite the fact that Belgium has ratified the UN Convention on the Rights of the Child in 1992, few children with special needs are taken care of in mainstream services. When they have access to a service, everything is focused on their deficiency. Professionals think they have to be trained to give what is considered as the “right” treatment to make the child « catch the others up ». There is an alternative way of thinking that focuses on each child’s competences. Adopting this way of thinking means to consider that what matters is every little thing a child can bring to the group, whatever his characteristics may be, and how he can benefit from daily life with other children and adults. The workshop has been focused on conditions that can help increase quality provisions : Who is welcomed everyday? How does an ECEC service welcome each family? Are there children and families who don’t come to ECEC services? Why don’t they come? Are they sufficiently informed on the inclusive approach of ECEC services, Etc The conference has referred to some testimonies collected by professionals from the French Community of Belgium. [less ▲]

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See detailCOSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses. IX. Time delays, lens dynamics and baryonic fraction in HE 0435-1223
Courbin, F.; Chantry, Virginie ULg; Revaz, Y. et al

in Astronomy and Astrophysics (2011), 536

We present accurate time delays for the quadruply imaged quasar HE 0435-1223. The delays were measured from 575 independent photometric points obtained in the R-band between January 2004 and March 2010 ... [more ▼]

We present accurate time delays for the quadruply imaged quasar HE 0435-1223. The delays were measured from 575 independent photometric points obtained in the R-band between January 2004 and March 2010. With seven years of data, we clearly show that quasar image A is affected by strong microlensing variations and that the time delays are best expressed relative to quasar image B. We measured ΔtBC = 7.8 ± 0.8 days, ΔtBD = -6.5 ± 0.7 days and ΔtCD = -14.3 ± 0.8 days. We spacially deconvolved HST NICMOS2 F160W images to derive accurate astrometry of the quasar images and to infer the light profile of the lensing galaxy. We combined these images with a stellar population fitting of a deep VLT spectrum of the lensing galaxy to estimate the baryonic fraction, fb, in the Einstein radius. We measured fb = 0.65-0.10+0.13 if the lensing galaxy has a Salpeter IMF and fb = 0.45-0.07+0.04 if it has a Kroupa IMF. The spectrum also allowed us to estimate the velocity dispersion of the lensing galaxy, σap = 222 ± 34 km s-1. We used fb and σap to constrain an analytical model of the lensing galaxy composed of an Hernquist plus generalized NFW profile. We solved the Jeans equations numerically for the model and explored the parameter space under the additional requirement that the model must predict the correct astrometry for the quasar images. Given the current error bars on fb and σap, we did not constrain H0 yet with high accuracy, i.e., we found a broad range of models with χ2 < 1. However, narrowing this range is possible, provided a better velocity dispersion measurement becomes available. In addition, increasing the depth of the current HST imaging data of HE 0435-1223 will allow us to combine ourconstraints with lens reconstruction techniques that make use of the full Einstein ring that is visible in this object. Based on observations made with the 1.2 m Euler Swiss Telescope, the 1.5 m telescope of Maidanak Observatory in Uzbekistan, and with the 1.2 m Mercator Telescope, operated on the island of La Palma by the Flemish Community, at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias. The NASA/ESA Hubble Space Telescope data was obtained from the data archive at the Space Telescope Science Institute, which is operated by AURA, the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS-5-26555.Light curves are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/536/A53 [less ▲]

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See detailRotation on the oscillation spectrum of solar-like stars
Suárez, J. C.; Goupil, M.-J.; Reese, Daniel ULg et al

in Alecian, G.; Belkacem, K.; Samadi, R. (Eds.) et al SF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics (2011, December 01)

One of the main sources of uncertainty in the asteroseismic models of solar-like stars is the poor match between predicted oscillation frequencies and observed ones in the very high frequency domain ... [more ▼]

One of the main sources of uncertainty in the asteroseismic models of solar-like stars is the poor match between predicted oscillation frequencies and observed ones in the very high frequency domain. Today, such deviation is usually corrected by fitting the affected frequencies with polynomials which are then physically explained by possible effects of turbulence, diffusion, etc., i.e., the so-called ``surface effects". In this work, we show that the effect of the stellar deformation due to rotation is of the same order or even larger than the aforementioned surface effects. Moreover, we show that rotation effects, even for the low velocities generally observed in solar-like stars, becomes important for the asteroseismic analysis and cannot be neglected when modeling such stars. [less ▲]

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See detailThérapie du mésothéliome pleural : compréhension des mécanismes de résistance à la chimiothérapie
Costa, Chrisostome ULg; Vandermeers, Fabian ULg; Reddy, NS Sathyanarayana ULg et al

Diverse speeche and writing (2011)

Thérapie du mésothéliome pleural : compréhension des mécanismes de résistance à la chimiothérapie. Chrisostome Costa 1, Fabian Vandermeers 2, Sathyanarayana Reddy 2, Céline Mascaux 3, Pascale Hubert 2 ... [more ▼]

Thérapie du mésothéliome pleural : compréhension des mécanismes de résistance à la chimiothérapie. Chrisostome Costa 1, Fabian Vandermeers 2, Sathyanarayana Reddy 2, Céline Mascaux 3, Pascale Hubert 2, Philippe Delvenne 2, Luc Willems 1,2 1 Laboratoire de biologie cellulaire et moléculaire, ULg, Gemboux Agro Bio-Tech, 13 av. Maréchal Juin, 5030 Gembloux ; Tél. : 32-(0)-81-622157 ; Fax : 32-(0)-81-6138 88 ; Courriel: ccosta@doct.ulg.ac.be 2 GIGA, ULg, Liège 3 Institut Bordet, ULB, Bruxelles - Introduction : Le mésothéliome pleural malin (MPM) est un cancer de la plèvre causé principalement par l’inhalation de fibres d’amiante. Nous avons montré précédemment que les inhibiteurs d’histones deacetylases (tel que le valproate, VPA) augmentent significativement l’efficacité des composés utilisés en chimiothérapie (pemetrexed et cisplatin) et prolonge la survie des patients atteints de MPM. Malheureusement, une proportion importante des patients développe une résistance au traitement de seconde ligne avec la doxorubicine et le VPA. - But du projet : L’objectif du travail est de disséquer les mécanismes qui régissent la réponse au traitement de seconde ligne du MPM. - Méthodes et résultats : Nous avons tout d’abord comparé deux types de lignées cellulaires présentant soit une sensibilité (cellules M14K) soit une résistance (cellules H28) au traitement combiné VPA+doxorubicine. En utilisant des microdamiers (Agilent), nous avons analysé le profil d’expression génique de cellules M14K et H28 traitées avec le VPA et la doxorubicine. Après quantification des fluorescences, une analyse statistique (Genespring GX) et une modélisation bioinformatique (Ingenuity) ont permis d’identifier les gènes candidats les plus relevants. En fonction de la p-value et du fold change, un nombre limité de gènes ont été sélectionnés et validés par la technique de qRT-PCR. Parmi ceux-ci, nous avons identifié le gène TGFA dont l’expression corrèle avec la résistance au traitement. En effet, nous avons observé que le niveau d’expression basale du gène TGFA est beaucoup plus important dans la lignée résistante H28 que dans la lignée sensible M14K. Dans le but de valider son implication dans la réponse à la thérapie, nous avons diminué (par interférence ARN) ou augmenté (par transfection d’un vecteur d’expression) l’expression de TGFA respectivement dans les lignées H28 ou M14K. Nous avons ensuite déterminé les taux d’apoptose en évaluant la fragmentation de l’ADN en présence de doxorubicine et de VPA. Les résultats montrent que la diminution de l’expression de TGFA permet une augmentation sensible de l’apoptose induite par le traitement combiné doxorubicine et VPA dans la lignée résistante H28 (de 9% à 36%). A l’inverse, la surexpression de TGFA est associée avec une diminution d’apoptose dans la lignée sensible M14K (de 28% à 18%). Ces observations ont été confirmées par une analyse de l’activité des caspases 3 et 7. En accord avec la propriété de la protéine TGFAd’induire la prolifération cellulaire via le récepteur à l’EGF, des inhibiteurs de l’activité tyrosine kinase (l’Iressa et le Tarceva) augmentent l’apoptose induite par la doxorubicine et le VPA dans la lignée résistante H28 (de 16% à 40%). L’efficacité du traitement combiné VPA+doxorubicine+Iressa/Tarceva est actuellement évaluée en modèle murin (souris SCID). - Conclusions : Nous avons identifié un gène, le TGFA, dont l’expression corrèle avec la résistance à l’apoptose induite par la doxorubicine et le VPA. L’utilisation d’inhibiteurs du récepteur EGF pourrait donc améliorer le traitement de seconde ligne du MPM. [less ▲]

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See detailCassini UVIS Observations of Titan Ultraviolet Airglow Spectra with Laboratory Modeling from Electron- and Proton-Excited N2 Emission Studies
Ajello, J. M.; West, R. A.; Malone, C. P. et al

Conference (2011, December 01)

Joseph M. Ajello, Robert A. West, Rao S. Mangina Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 Charles P. Malone Jet Propulsion Laboratory, California Institute of ... [more ▼]

Joseph M. Ajello, Robert A. West, Rao S. Mangina Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 Charles P. Malone Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 & Department of Physics, California State University, Fullerton, CA 92834 Michael H. Stevens Space Science Division, Naval Research Laboratory, Washington, DC 20375 Jacques Gustin Laboratoire de Physique Atmosphérique et Planétaire, Université de Liège, Liège, Belgium A. Ian F. Stewart, Larry W. Esposito, William E. McClintock, Gregory M. Holsclaw Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303 E. Todd Bradley Department of Physics, University of Central Florida, Orlando, FL 32816 The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed photon emissions of Titan's day and night limb-airglow and disk-airglow on multiple occasions, including three eclipse observations from 2009 through 2010. The 77 airglow observations analyzed in this paper show EUV (600-1150 Å) and FUV (1150-1900 Å) atomic multiplet lines and band emissions (lifetimes less than ~100 μs), including the Lyman-Birge-Hopfield (LBH) band system, arising from photoelectron induced fluorescence and solar photo-fragmentation of molecular nitrogen (N2). The altitude of peak UV emission on the limb of Titan during daylight occurred inside the thermosphere/ionosphere (near 1000 km altitude). However, at night on the limb, the same emission features, but much weaker in intensity, arise in the lower atmosphere below 1000 km (lower thermosphere, mesosphere, haze layer) extending downwards to near the surface at ~300 km, possibly resulting from proton- and/or heavier ion-induced emissions as well as secondary-electron-induced emissions. The eclipse observations are unique. UV emissions were observed during only one of the three eclipse events, and no Vegard-Kaplan (VK) or LBH emissions were seen. Through regression analysis using laboratory spectra, we have analyzed the intensity and identified each spectral feature from the limb or disk emission spectrum. The strongest dipole-allowed transitions of N2 occur in the EUV. The electronic transitions proceed from the X 1Σg+ ground-state to about seven closely spaced (~12-15 eV) Rydberg-valence (RV) states, which are the source of the molecular emissions in the EUV observed by spacecraft and have recently been studied in our laboratory at medium-to-high spectral resolution (delta-λ = 0.1 Å FWHM). Three of these RV states (b 1Πu, b' 1Σu+, and c4' 1Σu+) are highly-perturbed, weakly-to-strongly predissociated, and have significant emission cross sections, which will be summarized in this paper. We will also discuss our recently published proton and electron impact emission cross sections for the LBH (a 1Πg - X 1Σg+) band system of N2, and their significance to the modeling of the day and night FUV spectra of the atmospheres of Earth and Titan. [less ▲]

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See detailL'astronomie dans le monde
Manfroid, Jean ULg

in Ciel (Le) (2011), 73

Rosetta et Lutétia; Eau et disque proto-planétaire; Nouveaux amas; Galaxies primitives; Trou noir supermassif; Réionisation et premières étoiles; FERMI; ALMA

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