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See detailC 1s and N 1s core excitation of aniline: Experiment by electron impact and ab initio calculations
Duflot, D.; Flament, J. P.; Giuliani, Alexandre et al

in Physical Review A (2007), 75(5), 052719

Core shell excitation spectra of aniline at the carbon and nitrogen 1s edges have been obtained by inner-shell electron energy-loss spectroscopy recorded under scattering conditions where electric dipolar ... [more ▼]

Core shell excitation spectra of aniline at the carbon and nitrogen 1s edges have been obtained by inner-shell electron energy-loss spectroscopy recorded under scattering conditions where electric dipolar conditions dominate, with higher resolution than in the previous studies. They are interpreted with the aid of ab initio configuration interaction calculations. The spectrum at the C 1s edge is dominated by an intense pi(*) band. The calculated chemical shift due to the different chemical environment at the carbon 1s edge calculated is in agreement with the experimental observations within a few tenths of an eV. The transition energies of the most intense bands in the C 1s excitation spectrum are discussed at different levels of calculations. In the nitrogen 1s excitation spectrum the most intense bands are due to Rydberg-valence transitions involving the sigma(*)-type molecular orbitals, in agreement with the experiment. This assignment is different from that of extended Huckel molecular orbital calculations. The geometries of the core excited states have been calculated and compared to their equivalent core molecules and benzene. [less ▲]

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See detailC : N ratio increases in the phloem sap during floral transition of the long-day plants Sinapis alba and Arabidopsis thaliana
Corbesier, Laurent; Bernier, Georges ULg; Périlleux, Claire ULg

in Plant & Cell Physiology (2002), 43(6), 684-688

In plants of Sinapis alba and Arabidopsis thaliana, leaf exudate (phloem sap) was analysed during and after a single long day inducing flowering and in control short days. The amounts of carbohydrates and ... [more ▼]

In plants of Sinapis alba and Arabidopsis thaliana, leaf exudate (phloem sap) was analysed during and after a single long day inducing flowering and in control short days. The amounts of carbohydrates and amino acids were measured to estimate the organic C : N ratio. In both species, the C : N ratio of the phloem sap increased markedly and early during the inductive treatment, suggesting that an inequality in organic C and N supply to the apical meristem may be important at floral transition. [less ▲]

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See detailC FIBERS - MG MATRIX COMPOSITES PRODUCED BY SQUEEZE CASTING AND FRICTION STIR PROCESSING: Microstructure & Mechanical Behaviour
Mertens, Anne ULg; Simar, Aude; Delannay, Francis

Poster (2011, August)

Mg matrix composites appear as suitable competitors to Al alloys, as they allow for a significant weight reduction while exhibiting potentially comparable mechanical properties. A large variety of ... [more ▼]

Mg matrix composites appear as suitable competitors to Al alloys, as they allow for a significant weight reduction while exhibiting potentially comparable mechanical properties. A large variety of processing routes have already been considered for their production, including 'liquid state' processes such as squeeze casting. However these techniques necessitate a very careful control, simultaneously, of the solidification process, the wetting behaviour and the possible interfacial reactions between the reinforcements and the molten metal. And this is more particularly true in the case of Mg matrix composites with carbon fibers reinforcements, as Mg alloys are known to exhibit a poor wetting behaviour on carbon substrates. As a consequence, 'solid state' processing routes such as friction stir processing, that has been developed more recently, provide promising alternatives for the production of C-Mg composites. In the present work, Mg-Al-Zn alloys have been reinforced with carbon fibers using squeeze casting and friction stir processing. The microstructures and mechanical behaviour of composites produced by both processes have then been characterised and compared to those of non-reinforced samples, with a particular attention to the damage mechanisms prevailing in the composite materials. As a result, both processes have been compared in terms of the properties of their final products and hence their ability to produce sound composites. [less ▲]

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See detailC Fibres - Mg Matrix Composites Produced by Squeeze Casting and Friction Stir Processing: Microstructure & Mechanical Behaviour
Mertens, Anne ULg; Simar, Aude; Delannay, Francis

in Materials Science Forum (2012), 706-709

Mg-Al-Zn alloys have been reinforced with carbon fibres using either the liquid state process of squeeze casting (SC), or friction stir processing (FSP), a solid state process developed more recently and ... [more ▼]

Mg-Al-Zn alloys have been reinforced with carbon fibres using either the liquid state process of squeeze casting (SC), or friction stir processing (FSP), a solid state process developed more recently and that appears as a promising alternative for the large-scale production of C-Mg composites. Both processes have shown their ability to produce sound composites with enhanced strength compared to the non-reinforced alloys. in SC composites, the unsized woven C fabric remains intact while in the FSP composites the sized C fabric is fragmented in short fibres, with an aspect ratio typically equal to 4, homogeneously distributed in the Mg alloy matrix. [less ▲]

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See detailC'è una maschera per il cielo
Ricci, Davide ULg

Article for general public (2009)

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See detailC'est décidé, je bouge !
Henrotin, Yves ULg

Article for general public (2010)

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See detailC’est du belge! Séminaire consacré au français de Belgique. Carnet de résumés. Cours de Questions de linguistique française (Professeur M.-G. Boutier, assistant N. Mazziotta)
Boutier, Marie-Guy ULg; Mazziotta, Nicolas ULg

Learning material (2005)

Carnet regroupant les résumés des communications des étudiants pour le séminaire de Questions de linguistique française (2004-2005)

Detailed reference viewed: 31 (6 ULg)
See detail"C'est en faisant n'importe quoi qu'on devient n'importe qui" (Rémi Gaillard): Quel(s) roi(s) pour le fou?
Hamers, Jérémy ULg

Conference given outside the academic context (2012)

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See detailC'est le bouquet... Histoire d'un ornement typographique liégeois du XVIIIe siècle
Droixhe, Daniel ULg

in Gutenberg-Jahrbuch (1994), 69

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See detail"C'est mon nouveau papa"... "C'est mon beau-père" : créer la différence
Guillaume, Jean-François ULg

in Steichen, Robert; De Neuter, Patrick (Eds.) Les familles recomposées et leurs enfants (1995)

La multiplication de situations conjugales échappant aux normes juridiques amène à s'interroger sur ce qui fonde ou définit la famille contemporaine. Dans les familles recomposées, il s'agit de recomposer ... [more ▼]

La multiplication de situations conjugales échappant aux normes juridiques amène à s'interroger sur ce qui fonde ou définit la famille contemporaine. Dans les familles recomposées, il s'agit de recomposer un "ordre de réalité" autour de nouvelles typifications. Or les pratiques quotidiennes, d'éducation ou d'encadrement quotidien, restent floues du côté du "beau-parent" et soumises à des tensions diverses entre proximité et distance, individuation et cohésion. [less ▲]

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See detailC'est notre Terre !
Ozer, Pierre ULg; Blanchut, Fabienne; Locandro, Catherine et al

Diverse speeche and writing (2009)

Ces 12 petits films de 100 secondes présentent le point de vue des acteurs des négociations sur le climat. Ainsi, les revendications de l'UE, des USA, des pays en développement, de la Chine, mais aussi ... [more ▼]

Ces 12 petits films de 100 secondes présentent le point de vue des acteurs des négociations sur le climat. Ainsi, les revendications de l'UE, des USA, des pays en développement, de la Chine, mais aussi des producteurs d'énergie ou des ONG environnementales sont présentés. [less ▲]

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See detailC'est toujours la faute de l'autre en Belgique
Grandjean, Geoffrey ULg

Article for general public (2008)

This article aims to analyse quickly the conflict between the two big communities in Belgium. This State has been confronted to several crises. Each community considers that this is the responsability of ... [more ▼]

This article aims to analyse quickly the conflict between the two big communities in Belgium. This State has been confronted to several crises. Each community considers that this is the responsability of the other. The language has an important role to play in this situation. [less ▲]

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See detailC, N, P concentrations and requirements of flowering Posidonia oceanica shoots
Gobert, Sylvie ULg; Lejeune, Pierre; Lepoint, Gilles ULg et al

in Hydrobiologia (2005), 533

The carbon, nitrogen and phosphorus contents in flowering and nonflowering shoots were compared after an important flowering event occurred in the Posidonia meadow of the Bay of Calvi. The flower ... [more ▼]

The carbon, nitrogen and phosphorus contents in flowering and nonflowering shoots were compared after an important flowering event occurred in the Posidonia meadow of the Bay of Calvi. The flower formation caused a significant increase of C and a significant decrease of N concentrations in intermediate and adult leaves. Minimum daily requirements in mg shoot(-1) day(-1) of 3.4 and 4.8 of C, 0.09 and 0.09 N, 0.01 and 0.02 of P respectively for nonflowering and flowering shoots were calculated. It shows that additional quantities of C and P are required for the inflorescence elaboration. The unchanged quantity of N required by the shoot for the inflorescence elaboration and the significant modification of N concentration in intermediate and adult leaves suggests that N is limited in the environment and that an efficient resorption of N occurs from leaves to ensure the inflorescence formation. [less ▲]

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See detailC-60-containing nanostructured polymeric materials with potential biomedical applications
Stoilova, Olya; Jérôme, Christine ULg; Detrembleur, Christophe ULg et al

in Polymer (2007), 48(7), 1835-1843

Star-shaped polymers with a fullerene (C-60) Core and an unexpanded structure were successfully prepared by reaction Of C60 with amino end-capped polyesters HxC60(NHPCLn)(x) and polyethers HxC60(NHPEG(n ... [more ▼]

Star-shaped polymers with a fullerene (C-60) Core and an unexpanded structure were successfully prepared by reaction Of C60 with amino end-capped polyesters HxC60(NHPCLn)(x) and polyethers HxC60(NHPEG(n))(x), respectively. Upon irradiation of these C-60-derivatives, a large amount of singlet oxygen was released. Compared to previously synthesized star-shaped azafulleroids with an expanded structure, the photosensitivity of HxC60(NHPCLn)(x) is higher as assessed by a higher production of singlet oxygen. The cytotoxicity of the photoactive water-soluble HxC60(NHPEG(n))(x) derivatives was tested against THP-1 cells and expressed in terms of cell viability. Moreover, they were processed as micro-/nanosized fibers by electrospinning, which however required the addition of poly(F-caprolactone) (PCL). The diameter distribution of the fibers was trimodal, where the fraction with the 270 nm average diameter was the major population. Because of their photoactivity, the herein reported star-shaped C-60-derivatives are promising candidates for photodynamic cancer therapy and treatment of multidrug resistant pathogens. (c) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailThe c-erbB2 upstream regulatory region contains positive and negative cis-acting elements differentially active in human mammary tumor cell lines.
Grooteclaes, Madeleine; Pasleau, Françoise ULg; Berzi, Paulette et al

Conference (1994, January 29)

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See detailc-fos down-regulation inhibits testosterone-dependent male sexual behavior and the associated learning
Niessen, Neville-Andrew ULg; Balthazart, Jacques ULg; Ball, Gregory et al

in European Journal of Neuroscience (2013)

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See detailc-JUN gene induction and AP-1 activity is regulated by a JNK-dependent pathway in hypoxic HepG2 cells.
Minet, E.; Michel, G.; Mottet, Denis ULg et al

in Experimental Cell Research (2001), 265(1), 114-24

Hypoxia is an important pathophysiological stress that occurs during blood vessel injuries and tumor growth. It is now well documented that hypoxia leads to the activation of several transcription factors ... [more ▼]

Hypoxia is an important pathophysiological stress that occurs during blood vessel injuries and tumor growth. It is now well documented that hypoxia leads to the activation of several transcription factors which participate in the adaptive response of the cells to hypoxia. Among these transcription factors, AP-1 is rapidly activated by hypoxia and triggers bFGF, VEGF, and tyrosine hydroxylase gene expression. However, the mechanisms of AP-1 activation by hypoxia are not well understood. In this report, we studied the events leading to AP-1 activation in hypoxia. We found that c-jun protein accumulates in hypoxic HepG2 cells. This overexpression is concomitant with c-jun phosphorylation and JNK activation. Moreover, we showed that AP-1 is transcriptionally active. We also observed that AP-1 transcriptional activity is inhibited by a MEKK1 dominant negative mutant. Moreover, the MEKK1 dominant negative mutant as well as deletion of the AP-1 binding sites within the c-jun promoter inhibited the c-jun promoter activation by hypoxia. All together, these results indicate that, in hypoxic HepG2 cells, AP-1 is activated through a JNK-dependent pathway and that it is involved in the regulation of the c-jun promoter, inducing a positive feedback loop on AP-1 activation via c-jun overexpression. [less ▲]

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See detailThe c-jun N-terminal Kinase (JNK)-binding Protein (JNKBP1) Acts as a Negative Regulator of NOD2 Protein Signaling by Inhibiting Its Oligomerization Process
Lecat, Aurore ULg; Di Valentin, Emmanuel ULg; Somja, Joan ULg et al

in Journal of Biological Chemistry (2012), 287(35), 29213-26

NOD2 is one of the best characterized member of the cytosolic NOD-like receptors (NLR) family. NOD2 is able to sense muramyl dipeptide (MDP), a specific bacterial cell wall component, and to subsequently ... [more ▼]

NOD2 is one of the best characterized member of the cytosolic NOD-like receptors (NLR) family. NOD2 is able to sense muramyl dipeptide (MDP), a specific bacterial cell wall component, and to subsequently induce various signalling pathways leading to NF- kappaB activation and autophagy, both events contributing to an efficient innate and adaptative immune response. Interestingly, loss-of-function nod2 variants were associated with a higher susceptibility for Crohn ' s disease (CD), which highlights the physiological importance of proper regulation of NOD2 activity. We performed a biochemical screen to search for new NOD2 regulators. We identified a new NOD2 partner, c-jun N-terminal kinase binding protein 1 (JNKBP1), a scaffold protein characterized by a N-terminal WD-40 domain. JNKBP1, through its WD-40 domain, binds to NOD2 following MDP activation. This interaction attenuates NOD2-mediated NF-kappaB activation and IL-8 secretion as well as NOD2 antibacterial activity. JNKBP1 exerts its repressor effect by disturbing NOD2 oligomerization and RIP2 tyrosine phosphorylation, both steps required for downstream NOD2 signalling. We furthermore showed that JNKBP1 and NOD2 are co-expressed in the human intestinal epithelium and immune cells recruited in the lamina propria, which suggests that JNKBP1 contributes to maintain NOD2-mediated intestinal immune homeostasis. [less ▲]

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