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See detailLa radiation des tortues marines au Crétacé moyen
Scavezzoni, Isaure ULg

Conference given outside the academic context (2017)

"Turtles" (Testudines) form a successful group of reptiles with several terrestrial, marine and fresh-water species. Their peculiar and somewhat constrained morphology (i. e. : carapace incorporating ribs ... [more ▼]

"Turtles" (Testudines) form a successful group of reptiles with several terrestrial, marine and fresh-water species. Their peculiar and somewhat constrained morphology (i. e. : carapace incorporating ribs, curved limbs, anapsid skull exempt of temporal fenestrae) and ecology has often obscured their relationships and, hence, their evolutionary history, notably in marine turtles (chelonioids). Modern chelonioids are divided in two clades (i. e. : shoft-shelled turtles and hard-shelled turtles) supported by distinct morphological and embryological characters. Their origin is traced back up to the Cretaceous, along with a series of extinct forms, many of which being collectively known as Protostegidae. Fossil evidence show that at least five clades of marine turtles were roaming the seas at the end of the Cretaceous. In fact, chelonioids appeared during the first stages of the Early Cretaceous and quickly exploded to reach a high level of disparity at the lowermost part of the late Cretaceous. Therefore, the Mesozoic radiation of chelonioids must have happened during the "middle" Cretaceous (especially the Aptian-Albian interval). However this radiation is poorly understood as the phylogenetic relationships of marine turtles are not resolved yet. Bringing new data may help resolve these issues, and it is the exact reason why the genus Rhinochelys is being investigated. [less ▲]

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See detailDroit constitutionnel belge - Dossier de documentation (année académique 2016-2017)
Behrendt, Christian ULg

Learning material (2017)

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en bachelier en ... [more ▼]

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en bachelier en droit et en science politique [less ▲]

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See detailLoss of transfer RNA U34 modifying enzymes impairs hematopoietic stem and progenitor cell differentiation and function
Rosu, Adeline ULg; Bai, Qiang ULg; Ramery, Eve ULg et al

Poster (2017, February 03)

Hematopoietic stem and progenitor cells (HSPCs) require fine-tuned protein translation for their normal maintenance and function. Conserved modifications of the wobble uridine base (U34) in transfer RNAs ... [more ▼]

Hematopoietic stem and progenitor cells (HSPCs) require fine-tuned protein translation for their normal maintenance and function. Conserved modifications of the wobble uridine base (U34) in transfer RNAs catalyzed by the Elongator complex are required for optimal protein translation efficacy and fidelity, but their biological importance in mammalian stem and progenitor cells remains largely unexplored. Here, we studied the impact of loss of activity of the catalytic subunit Elp3 of Elongator on HSPC differentiation and function. Hematopoietic-cell-specific depletion of Elp3 in conditional knockout mice resulted in shortened lifespan associated with hematopoietic failure and lymphoma development. Elp3 deletion caused apoptosis of specific bone marrow multipotent progenitors and blocked differentiation of committed progenitors, resulting in blood and bone marrow pancytopenia. In contrast, Elp3-deficient hematopoietic stem cells (HSCs) expanded with age and did not exhaust throughout life, although they were defective in reconstituting hematopoiesis in competitive transplantation assays. Mechanistically, loss of Elp3 did not result in detectable alterations in global protein synthesis rates in any HSPC subset. Rather, Elp3-deficient HSPCs displayed enhanced activity of the stress integrator and apoptosis and cell cycle regulator p53. Thus, this study supports the notion that Elongator activity is required in distinct HSPC subsets to avoid aberrant p53 activation, which otherwise results in discrete loss of function phenotypes in HSCs and downstream progenitors. [less ▲]

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See detailY a-t-il eu un impérialisme linguistique romain ?
Rochette, Bruno ULg

Scientific conference (2017, February 03)

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See detailDNA Labeling at Electron Microscopy
Thelen, Nicolas ULg; Thiry, Marc ULg

in Carlo, Pellicciari; Marco Biggiogera, Biggiogera (Eds.) Histochemistry of Single Molecules (2017)

Here, we describe a method for locating DNA on ultrathin sections. This technique is compatible with all usual fixation and embedding procedures and can be combined with cytochemical methods. Ultrathin ... [more ▼]

Here, we describe a method for locating DNA on ultrathin sections. This technique is compatible with all usual fixation and embedding procedures and can be combined with cytochemical methods. Ultrathin sections are incubated in a medium containing terminal deoxynucleotidyl transferase (TdT) and various non-isotopic nucleotide analogs. The labeled nucleotides bound to the surface of ultrathin sections are then visualized by an indirect immunogold labeling technique. This high-resolution method provides a powerful tool for pinpointing the precise location of DNA within biological material, even where DNA is present in very low amounts. [less ▲]

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See detailC'est la faute à l'Europe !
Grandjean, Geoffrey ULg

Conference given outside the academic context (2017)

Detailed reference viewed: 37 (3 ULg)
See detailLa voix dans tous ses états.
Morsomme, Dominique ULg

Conference given outside the academic context (2017)

La voix occupe une place prépondérante dans notre vie. Elle fait partie de notre identité. Sur un simple « allo », nous identifions aisément son propriétaire, plus encore nous sommes capables de détecter ... [more ▼]

La voix occupe une place prépondérante dans notre vie. Elle fait partie de notre identité. Sur un simple « allo », nous identifions aisément son propriétaire, plus encore nous sommes capables de détecter son humeur. Si elle s’enraye, elle perturbe non seulement notre capacité à communiquer, mais elle influence également la perception que l’auditeur a de nous. Elle fait l’objet de recherche au carrefour de domaines aussi variés que la médecine, la psychologie, la logopédie et la pédagogie. Nous débuterons cette conférence par voyager dans le monde de la voix via différents échantillons vocaux provenant des 4 coins du monde. Cette expérience auditive nous permettra de prendre conscience des nombreuses capacités de notre système vocale. Ensuite, nous tâcherons de comprendre son fonctionnement et ses caractéristiques. Nous discuterons des professionnels de la voix, ceux que vous croisez tous les jours, les enseignants, les orateurs, les présentateurs. Nous parlerons de la charge vocale et de ce qu’implique un métier à voix. Le concept de dysphonie, trouble de la voix parlée, sera abordé et nous verrons comment la médecine et la logopédie peuvent répondre aux plaintes de patients dysphoniques. Nous terminerons cet exposé par des extraits de films de rééducation afin que vous compreniez mieux en quoi consiste une rééducation vocale. Nous espérons ainsi rendre à la voix la place qu’elle mérite dans notre système social et humain. [less ▲]

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See detailDe quelles(s) mémoire(s) parlons-nous ? Monopole et concurrence mémoriels
Grandjean, Geoffrey ULg

Conference given outside the academic context (2017)

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See detailLocutifs et énoncés non verbaux en ancien français
Mazziotta, Nicolas ULg

Conference (2017, February 02)

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See detailLe behaviorisme logique en question
Dony, Arthur ULg

in Bulletin d'Analyse Phénoménologique (2017), XIII(1), 1-19

Dans une démarche inspirée des sciences de la nature, le behaviorisme logique se présente comme une théorie philosophique visant à rendre compte des états mentaux de façon « objective », en réduisant ceux ... [more ▼]

Dans une démarche inspirée des sciences de la nature, le behaviorisme logique se présente comme une théorie philosophique visant à rendre compte des états mentaux de façon « objective », en réduisant ceux-ci au comportement observable. Comme l’énonçait déjà Hempel, il s’agit de traduire tout énoncé psychologique en un énoncé où ne figurent plus que des concepts physiques de façon à faire l’économie de la dimension subjective de l’expérience, laquelle ne constituerait rien de plus qu’un simple rouage à vide, inessentiel à l’état mental lui-même. Dans cet article, je propose d’examiner les principaux arguments, désormais jugés classiques, avancés par Wittgenstein, Ryle et Dennett en faveur de cette théorie. Mon but est non seulement de mettre au jour les déficiences de l’argumentation et les présupposés problématiques qui la guident, mais plus fondamentalement de montrer en quoi cette doctrine, en dépit de la popularité qu’elle s’est acquise en philosophie contemporaine, s’avère à l’analyse inconsistante. [less ▲]

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See detailFormes brèves et complexité narrative : l'effet de déjà-vu dans "Southcliffe" (Warp Films, 2013)
Belloi, Livio ULg

Conference (2017, February 02)

Cette communication se penche sur la mini-série anglaise "Southcliffe" (Warp Films, 2013) et s'emploie à dégager en elle divers effets de reprise et de déjà-vu. Ces effets font ensuite l'objet d'une ... [more ▼]

Cette communication se penche sur la mini-série anglaise "Southcliffe" (Warp Films, 2013) et s'emploie à dégager en elle divers effets de reprise et de déjà-vu. Ces effets font ensuite l'objet d'une interrogation touchant à la notion de "complexité narrative" (J. Mittell). [less ▲]

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See detailEntomologie forensique: les insectes résolvent les crimes
Verheggen, François ULg

Scientific conference (2017, February 02)

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See detailCrosstalk between VEGF and BMP9 pathway. Implications in HHT disease
Pollenus, Thomas ULg

Poster (2017, February 01)

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See detailCharacterization of minimally conscious state minus and plus according to resting functional connectivity
Aubinet, Charlène ULg; Heine, Lizette; Martial, Charlotte ULg et al

Scientific conference (2017, February 01)

The minimally conscious state (MCS) has been sub-categorized in MCS plus and MCS minus, i.e. respectively with and without command following capacity. Here we aimed at characterizing differences in MCS ... [more ▼]

The minimally conscious state (MCS) has been sub-categorized in MCS plus and MCS minus, i.e. respectively with and without command following capacity. Here we aimed at characterizing differences in MCS plus as compared to MCS minus by means of functional connectivity (FC). Resting state functional magnetic resonance imagery (fMRI) was acquired in 292 MCS patients and a seed-based analysis was conducted on a convenience sample of 19 MCS patients (10 MCS plus and 9 MCS minus) and 35 healthy controls. We investigated the left and right frontoparietal networks (FPN), the auditory network and the default mode network (DMN). We employed a ROI-to-ROI analysis and a voxel-based morphometry in order to investigate the inter-hemispheric connectivity and the grey and white matter volume, respectively. A significantly higher FC was found in MCS plus as compared to MCS minus in the left FPN, specifically between the left dorso-lateral prefrontal cortex and the left temporo-occipital fusiform cortex (TOFC). The FC of auditory network, right FPN and DMN, inter-hemispheric connectivity and structure of grey and white matter did not show differences between patients groups. The clinical sub-categorization of MCS is therefore sustained by FC differences in a language-related executive control network. These patient groups are not differentiated by networks involved in auditory processing, perception of surroundings and internal thoughts, nor by differences in inter-hemispheric connectivity and in morphology. [less ▲]

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See detailA new asteroseismic diagnostic for internal rotation in γ Doradus stars
Ouazzani, Rhita-Maria; Salmon, Sébastien ULg; Antoci, V. et al

in Monthly Notices of the Royal Astronomical Society (2017), 465

With four years of nearly-continuous photometry from Kepler, we are finally in a good position to apply asteroseismology to $\gamma$ Doradus stars. In particular several analyses have demonstrated the ... [more ▼]

With four years of nearly-continuous photometry from Kepler, we are finally in a good position to apply asteroseismology to $\gamma$ Doradus stars. In particular several analyses have demonstrated the possibility to detect non-uniform period spacings, which have been predicted to be directly related to rotation. In the present work, we define a new seismic diagnostic for rotation in $\gamma$ Doradus stars that are too rapidly rotating to present rotational splittings. Based on the non uniformity of their period spacings, we define the observable $\Sigma$ as the slope of the period spacing when plotted as a function of period. We provide a one-to-one relation between this observable $\Sigma$ and the internal rotation, which applies widely in the instability strip of $\gamma$ Doradus stars. We apply the diagnostic to a handful of stars observed by Kepler. Thanks to g-modes in $\gamma$ Doradus stars, we are now able to determine the internal rotation of stars on the lower main sequence, which is still not possible for Sun-like stars. [less ▲]

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