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See detailNegative association between smoking and anti-saccharomyces cerevisiae antibodies in Crohn's disease
Van Kemseke, Catherine ULg; Belaiche, Jacques ULg; Steeman, C. et al

in Acta Gastro-Enterologica Belgica (2003), 66(1, Jan-Mar), 1-6

Background: Crohn's disease (CD) is a polygenic multifactorial heterogeneous disease. Anti-Saccharomyces Cerevisiae antibodies (ASCA) correlate highly with CD and are present in 50-80% of patients. The ... [more ▼]

Background: Crohn's disease (CD) is a polygenic multifactorial heterogeneous disease. Anti-Saccharomyces Cerevisiae antibodies (ASCA) correlate highly with CD and are present in 50-80% of patients. The reason for ASCA positivity or negativity in CD is unknown. The aim of our work was to analyse clinical, epidemiological and genetic characteristics in ASCA + or ASCA- CD patients. Methods : 113 patients with CD were tested for ASCA (IgA and IgG) by using a commercial kit (Medipan Diagnostica). Age, gender, systemic manifestations, familial form of disease, age at diagnosis, location and behaviour of the disease, smoking habit as well as genotyping for -308 TNF gene polymorphisms were determined. Results : 38.9% CD patients were negative for both IgA and IgG ASCA while 61.1% were ASCA positive (respectively IgA and IgG : 31.9%; IgA only : 9.7%; IgG only : 19.5%). The only significant difference between ASCA+ and ASCA- patients was for smoking habit : there were 29% smokers in ASCA+ versus 50% in ASCA- CD patients (P = 0.03). This low proportion of smokers was more prominent in ASCA IgA+ patients than in isolated ASCA IgG+ patients (25.6% versus 45.5%) and was minimal in patients with high titers of ASCA IgA (0/8). Logistic regression showed smoking habit still borderline for significance (P = 0.057). Conclusions : Our results suggest a negative association between smoking and ASCA positivity in CD. This association was more prominent for ASCA IgA+. It indicates that smoking habit should be taken into account when analysing ASCA status in CD patients and may suggest an influence of smoking on immunization against intestinal material. [less ▲]

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See detailNegative effect of milk production level on reproduction performances. Not a fatality.
Hanzen, Christian ULg; Glorieux, Géry; Chapaux, Philippe

Poster (2013, September)

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See detailNegative magnetoresistance in mixed-valence La0.6Y0.1Ca0.3MnO3: Evidence for charge localization governed by the Curie-Weiss law
Sergeenkov, S.; Bougrine, Hassan ULg; Ausloos, Marcel ULg et al

in JETP Letters (1999), 70(2), 141-146

The colossal negative magnetoresistance Delta rho observed in La0.6Y0.1Ca0.3MnO3 at B=1 T shows an unusual, nearly perfect symmetry (around the peak temperature T-0=160 K), suggestive of a Curie-Weiss ... [more ▼]

The colossal negative magnetoresistance Delta rho observed in La0.6Y0.1Ca0.3MnO3 at B=1 T shows an unusual, nearly perfect symmetry (around the peak temperature T-0=160 K), suggestive of a Curie-Weiss-dominated transport mechanism in this material both above and below the field-dependent Curie temperature T(C)equivalent to T-0. Attributing this symmetry to strong magnetic fluctuations below T-C (which are triggered by the Y substitution and cause a "bootstrap" destruction of the ferromagnetic phase), the data are interpreted in terms of the nonthermal spin hopping and magnetization-dependent charge carrier localization scenario leading to Delta rho=-rho(s)(1-e(-gamma M2)), with the magnetization M(T,B)=CB/\ T-T-C(B)\(nu). The separate fits through all the data points above and below T-C yield C(+)similar or equal to 2C(-) and nu(+)similar or equal to nu(-)similar or equal to 1, in agreement with the predictions of the Landau mean-field theory. (C) 1999 American Institute of Physics. [S0021-3640(99)01314-6]. [less ▲]

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See detailNegative parity baryons in the 1/N_c expansion : the quark excitation versus the meson-nucleon resonance picture
Matagne, Nicolas; Stancu, Floarea ULg

in Physical Review. D : Particles and Fields (2011), 84

In order to better understand the fundamental issue regarding the compatibility between the quark-shell picture and that of resonances in meson-nucleon scattering in large $N_c$ QCD we extend the work of ... [more ▼]

In order to better understand the fundamental issue regarding the compatibility between the quark-shell picture and that of resonances in meson-nucleon scattering in large $N_c$ QCD we extend the work of Cohen and Lebed on mixed symmetric $\ell $ = 1 baryons to analyze excited states with $\ell $ = 3. We give an explicit proof on the degeneracy of mass eigenvalues of a simple Hamiltonian including operators up to order $\mathcal{O}(N^0_c)$ \emph{i. e.} neglecting $1/N_c$ corrections in the quark-shell picture in the large $N_c$ limit. We obtain three degenerate multiplets formed of $\ell = 3$ states, as in the case of $\ell $ = 1 baryons. The compatibility between this picture and that of resonances in meson-nucleon scattering is discussed in the light of the present results. [less ▲]

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See detailNegative parity baryons in the 1/Nc expansion: the three towers of states revisited.
Matagne, Nicolas; Stancu, Floarea ULg

in Physical Review. D : Particles and Fields (2012), D86

We discuss the compatibility between the quark-shell picture and the meson-nucleon scattering picture in large $N_c$ QCD for mixed symmetric $\ell$ = 1 states previously analyzed by using a simple ... [more ▼]

We discuss the compatibility between the quark-shell picture and the meson-nucleon scattering picture in large $N_c$ QCD for mixed symmetric $\ell$ = 1 states previously analyzed by using a simple Hamiltonian including operators up to order $\mathcal{O}(N^0_c)$ defined in the standard ground state symmetric core + excited quark procedure. Here we introduce a Hamiltonian of order $\mathcal{O}(N^0_c)$ defined in a new approach where the separation of the system into two parts is not required. Three degenerate sets of states (towers) with the same quantum numbers as in the scattering picture and in the standard procedure are obtained. Thus the compatibility is equally achieved. The eigenvalues of the presently chosen Hamiltonian also have simple analytic expressions, depending linearly on the three dynamical coefficients entering the Hamiltonian. This reinforces the validity of the new approach which had already successfully described excited negative parity baryons in a large energy range. [less ▲]

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See detailNegative parity nonstrange baryons in large Nc QCD: quark excitation versus meson-nucleon scattering
Stancu, Floarea ULg; Matagne, Nicolas ULg

in Bled Workshops in Physics (2011), 12(1), 57-63

We show that the two complementary pictures of large $N_c$ baryons - the single-quark orbital excitation about a symmetric core and the meson-nucleon resonance -- are compatible for $\ell$ = 3 SU(4 ... [more ▼]

We show that the two complementary pictures of large $N_c$ baryons - the single-quark orbital excitation about a symmetric core and the meson-nucleon resonance -- are compatible for $\ell$ = 3 SU(4) baryons. The proof is based on a simple Hamiltonian including operators up to order $\mathcal{O}(N^0_c)$ used previously in the literature for $\ell$ = 1. [less ▲]

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See detailNegative polarity as a trigger for the development of modal meaning
Davidse, Kristin; Van linden, An; Brems, Lieselotte ULg

Conference (2014, October)

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See detailNegative purifying selection drives prion and doppel protein evolution
Tsangaras, K.; Kolokotronis, S.-O.; Ulrich, R. G. et al

in Journal of Molecular Evolution (2014), 79(1-2), 12-20

The prion protein (PrP) when misfolded into the pathogenic conformer PrPSc is the major causative agent of several lethal transmissible spongiform encephalopathies in mammals. Studies of evolutionary ... [more ▼]

The prion protein (PrP) when misfolded into the pathogenic conformer PrPSc is the major causative agent of several lethal transmissible spongiform encephalopathies in mammals. Studies of evolutionary pressure on the corresponding gene using different datasets have yielded conflicting results. In addition, putative PrP or PrP interacting partners with strong similarity to PrP such as the doppel protein have not been examined to determine if the same evolutionary mechanisms apply to prion paralogs or if there are coselected sites that might indicate how and where the proteins interact. We examined several taxonomic groups that contain model organisms of prion diseases focusing on primates, bovids, and an expanded dataset of rodents for selection pressure on the prion gene (PRNP) and doppel gene (PRND) individually and for coevolving sites within. Overall, the results clearly indicate that both proteins are under strong selective constraints with relaxed selection on amino acid residues connecting α-helices 1 and 2. © 2014 Springer Science+Business Media New York. [less ▲]

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See detailNegative refraction: theory and application to thin metal layer superlens
Lecler, Sylvain; Frere, Benjamin; Habraken, Serge ULg et al

in Proceedings of SPIE (2008), 6987

The main concepts dealing with negative refraction are clarified in order to understand if a high conductive metal layer thinner than the wavelength can really be considered as a metamaterial with a ... [more ▼]

The main concepts dealing with negative refraction are clarified in order to understand if a high conductive metal layer thinner than the wavelength can really be considered as a metamaterial with a negative refraction index. The theoretical method to find the direction of phase velocity is clearly explained. The use of the causality principle is presented. We discuss why the negative refractive metamaterial has to be regarded as a dispersive one. Discussions are illustrated by means of FDTD simulations. The superlens application is presented. We explain why it is not obvious to consider a thin metal layer as a negative refractive material. [less ▲]

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See detailNegative Relative Clauses in Late Egyptian. A Functional Perspective
Sojic, Nathalie ULg

Poster (2015, August 26)

The poster contains a functional taxonomy of the negative relative clauses in Late Egyptian

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See detailNegative valence affects false working memories too
Dehon, Hedwige ULg; Martial, Charlotte ULg

Poster (2013, May 28)

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See detailNegative wind anomalies generated a diminution of productivity in the North Atlantic in 2010
Troupin, Charles ULg; Machín, Francis

Poster (2012, April 27)

The weakening of the wind intensity in winter 2010, related to a low NAO index, generated unseen temperature anomalies and a significant decrease of biological activity in the Canary Current upwelling ... [more ▼]

The weakening of the wind intensity in winter 2010, related to a low NAO index, generated unseen temperature anomalies and a significant decrease of biological activity in the Canary Current upwelling system. [less ▲]

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See detailNegative wind anomalies generated a diminution of productivity of in the North Atlantic in 2010
Troupin, Charles ULg; Machín, Francisco

Poster (2012, November 14)

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See detailNégativité et finitude de l'élan vital
Caeymaex, Florence ULg

in Annales bergsoniennes (2008), IV

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See detailNegentiende-eeuwse anglofilie in Nederland
Steyaert, Kris ULg

in Spiegel der Letteren (2015), 57(3), 352-354

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See detailThe neglected intrinsic resistome of bacterial pathogens.
Fajardo, Alicia; Martinez-Martin, Nadia; Mercadillo, Maria et al

in PloS one (2008), 3(2), 1619

Bacteria with intrinsic resistance to antibiotics are a worrisome health problem. It is widely believed that intrinsic antibiotic resistance of bacterial pathogens is mainly the consequence of cellular ... [more ▼]

Bacteria with intrinsic resistance to antibiotics are a worrisome health problem. It is widely believed that intrinsic antibiotic resistance of bacterial pathogens is mainly the consequence of cellular impermeability and activity of efflux pumps. However, the analysis of transposon-tagged Pseudomonas aeruginosa mutants presented in this article shows that this phenotype emerges from the action of numerous proteins from all functional categories. Mutations in some genes make P. aeruginosa more susceptible to antibiotics and thereby represent new targets. Mutations in other genes make P. aeruginosa more resistant and therefore define novel mechanisms for mutation-driven acquisition of antibiotic resistance, opening a new research field based in the prediction of resistance before it emerges in clinical environments. Antibiotics are not just weapons against bacterial competitors, but also natural signalling molecules. Our results demonstrate that antibiotic resistance genes are not merely protective shields and offer a more comprehensive view of the role of antibiotic resistance genes in the clinic and in nature. [less ▲]

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See detailA Neglected Reservoir of Mamluk Literature: al-Ṣafadī and his Tadhkira
Bauden, Frédéric ULg

Scientific conference (2010, April 16)

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See detailNégliger des termes ? Opportunités et difficultés
Krysinska, Mariza; Schneider-Gilot, Marguerite ULg

Conference (2002)

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See detailLas negociaciones UE-Mercosur: un juego con pocas cartas en la mesa?
Santander, Sébastian ULg

in Revista de Derecho Internacional y del Mercosur (2003), 2

L'UE et le Mercosur sont engagé depuis de nombreuses années dans des négociations commerciales dans l'objectif de sceller un accord d'association devant intégrer une zone de libre-échange interrégionale ... [more ▼]

L'UE et le Mercosur sont engagé depuis de nombreuses années dans des négociations commerciales dans l'objectif de sceller un accord d'association devant intégrer une zone de libre-échange interrégionale. Plusieurs obstacles affectent les négociations. Pour l'UE l'agriculture reste un domaine très sensible d'autant que les pays d'Amérique du Sud ont d'importants avantages comparatifs dans ce secteur. Pour les économies des pays du Mercosur, l'industrie et les services constituent de véritables sujets sensibles. [less ▲]

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See detailNegociation and Transaction in a context of restructuring. The role of actors: trust and uncertainy
Robert, Jocelyne ULg

Conference (2006, June 12)

In the current context of globalization and industrial restructuring, we find it interesting to analyse a negotiation about a re-opening of a production site within a multinational enterprise. This ... [more ▼]

In the current context of globalization and industrial restructuring, we find it interesting to analyse a negotiation about a re-opening of a production site within a multinational enterprise. This negotiation between trade unions and management representatives was strategic for the revival of production activity and retention of 10,000 direct and indirect jobs. It allows us to illustrate the “structuration’ theory of Giddens (1990) insofar as we cannot ignore neither the importance of structures nor the actions of individuals; each element has an influence on the other and is influenced in return. In a first section, we analyse to what degree trade unions can be considered as ‘stakeholders’ by reviewing different theories of ‘Corporate social responsibility’ and of ‘Corporate Stakeholders’. Our analysis highlights the importance of trade unions as ‘corporate stakeholders’ in a situation of social negotiation on restructuring in a steel group. This analysis cannot however ignore the specific context of the situation: informal feature of the negotiation, unpredictability of the result, international competitive context, conflicting issues of the reorganisation. We present and analyse in the second section the context and the different stages of the negotiation on the reopening of activities at the Belgium steel plant, at the light of interviews with union representatives involved in this negotiation. More than other types of negotiation, those concerning corporate restructuring are stressing and risky because their impacts on the employment of thousands of persons and the economy of a whole region. We analyse the different stages of this negotiation with regard to ethical questioning. Our analysis is mainly based on the point of view expressed by one of the ‘parties’, making thus reference to ‘corporate social responsibility’ theory and more specifically to the ‘stakeholders theory’ through the union lens. We refer to the concept of ‘social transaction’ to analyse the play of the actors in this social negotiation. We will attempt to explain how Corporate Social Responsibility on one side, and relations between various 'stakeholders’ on the other side, give a specific perspective to a negotiation process. The third and final section is devoted to a critical analysis of key features of trust and uncertainty in relation to these negotiations. The concepts of trust and uncertainty notably will permit to explain the importance of taking into consideration the way of how things happen and understand how processes are elaborated. Modern societies are characterised by uncertainty. Faced with it, social actors can search for trust relationship to find some stability. Communication of information can positively contribute to the construction of a climate of trust in organisation. Negotiation spaces may be limited by important constraints but resources could be renewed or created by actors themselves. We will conclude by trying, doubtless in a utopian way, to situate the present case study in respect to a democratic process of social change. A search of compromise could respond to situations of uncertainty. Besides, the process of trust elaboration is a response to uncertain situations. Uncertainty is a fundamental resource of a negotiation and a source of power for those who can control and use it in their transactions. [less ▲]

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