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See detailStudy by Hall probe mapping of the trapped flux modification produced by local heating in YBCOHTS bulks for different surface/volume ratios
Laurent, Philippe ULg; Mathieu, Jean-Philippe; Mattivi, Brice et al

in Superconductor Science and Technology (2005), 18(8), 1047-1053

The aim of this report is to compare the trapped field distribution under a local heating created at the sample edge for different sample morphologies. Hall probe mappings of the magnetic induction ... [more ▼]

The aim of this report is to compare the trapped field distribution under a local heating created at the sample edge for different sample morphologies. Hall probe mappings of the magnetic induction trapped in YBCO bulk samples maintained out of thermal equilibrium were performed on YBCO bulk single domains, YBCO single domains with regularly spaced hole arrays, and YBCO superconducting foams. The capability of heat draining was quantified by two criteria: the average induction (B) decay and the size of the thermally affected zone caused by a local heating of the sample. Among the three investigated sample shapes, the drilled single domain displays a trapped induction which is weakly affected by the local heating while displaying a high trapped field. Finally, a simple numerical modelling of the heat flux spreading into a drilled sample is used to suggest some design rules about the hole configuration and their size. [less ▲]

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See detailRandom matrix models for chiral and diquark condensation
Vanderheyden, Benoît ULg; Jackson, A. D.; Lansberg, Jean-Philippe ULg et al

in AIP Conference Proceedings (2005), 775

We consider random matrix models for the thermodynamic competition between chiral symmetry breaking and diquark condensation in QCD at finite temperature and finite baryon density. The models produce mean ... [more ▼]

We consider random matrix models for the thermodynamic competition between chiral symmetry breaking and diquark condensation in QCD at finite temperature and finite baryon density. The models produce mean field phase diagrams whose topology depends solely on the global symmetries of the theory. We discuss the block structure of the interactions that is imposed by chiral, spin, and color degrees of freedom and comment on the treatment of density and temperature effects. Extension of the coupling parameters to a larger class of theories allows us to investigate the robustness of the phase topology with respect to variations in the dynamics of the interactions. We briefly study the phase structure as a function of coupling parameters and the number of colors. [less ▲]

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See detailExtended-spectrum-beta-lactamase-producing Enterobacteriaceae in Yaounde, Cameroon
Gangoue Pieboji, Joseph ULg; Bedenic, B.; Koulla-Shiro, S. et al

in Journal of Clinical Microbiology (2005), 43(7), 3273-7

Organisms producing extended-spectrum beta-lactamases (ESBLs) have been reported in many countries, but there is no information on the prevalence of ESBL-producing members of the family Enterobacteriaceae ... [more ▼]

Organisms producing extended-spectrum beta-lactamases (ESBLs) have been reported in many countries, but there is no information on the prevalence of ESBL-producing members of the family Enterobacteriaceae in Cameroon. A total of 259 Enterobacteriaceae strains were isolated between 1995 and 1998 from patients at the Yaounde Central Hospital in Cameroon. Enterobacterial isolates resistant to extended-spectrum cephalosporin and monobactam were screened for ESBL production by the double-disk (DD) synergy test. Thirty-one (12%) of these Enterobacteriaceae strains were shown to be positive by the DD synergy test, suggesting the presence of ESBLs. Resistance to oxyimino-cephalosporins and monobactams of 12 (38.7%) of the 31 strains-i.e., 6 Klebsiella pneumoniae, 4 Escherichia coli, 1 Citrobacter freundii, and 1 Enterobacter cloacae strain-was transferred to E. coli HK-225 by conjugation. Resistance to gentamicin, gentamicin plus trimethoprim-sulfamethoxazole, or trimethoprim-sulfamethoxazole was cotransferred into 6, 2, and 1 of these transconjugants, respectively. All 12 transconjugants were resistant to amoxicillin, piperacillin, all of the cephalosporins, and aztreonam but remained susceptible to cefoxitin and imipenem. Crude extracts of beta-lactamase-producing transconjugants were able to reduce the diameters of inhibition zones around disks containing penicillins, narrow- to expanded-spectrum cephalosporins or monobactams when tested against a fully susceptible E. coli strain but had no effect on such zones around cefoxitin, imipenem, and amoxicillin-clavulanate disks. The beta-lactamases produced by the 12 tranconjugants turned out to be SHV-12 by DNA sequencing. Therefore, the ESBL SHV-12 is described for the first time in Cameroon. [less ▲]

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See detailEmergence of CTX-M-15-producing enterobacteria in Cameroon and characterization of a blaCTX-M-15-carrying element
Gangoue Pieboji, Joseph ULg; Miriagou, V.; Vourli, S. et al

in Antimicrobial Agents and Chemotherapy (2005), 49(1), 441-3

CTX-M-15-producing Klebsiella pneumoniae and Escherichia coli emerged recently in Cameroon. CTX-M-15 was encoded by two different multiresistance plasmids, of which one carried an ISEcp1-bla(CTX-M-15 ... [more ▼]

CTX-M-15-producing Klebsiella pneumoniae and Escherichia coli emerged recently in Cameroon. CTX-M-15 was encoded by two different multiresistance plasmids, of which one carried an ISEcp1-bla(CTX-M-15) element flanked by a 5-bp target site duplication and inserted within a Tn2-derived sequence. A truncated form of this element in the second plasmid was identified. [less ▲]

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See detailThe Pseudomonas aeruginosa pirA gene encodes a second receptor for ferrienterobactin and synthetic catecholate analogues.
Ghysels, Bart ULg; Ochsner, Urs; Mollman, Ute et al

in FEMS microbiology letters (2005), 246(2), 167-74

Actively secreted iron chelating agents termed siderophores play an important role in the virulence and rhizosphere competence of fluorescent pseudomonads, including Pseudomonas aeruginosa which secretes ... [more ▼]

Actively secreted iron chelating agents termed siderophores play an important role in the virulence and rhizosphere competence of fluorescent pseudomonads, including Pseudomonas aeruginosa which secretes a high affinity siderophore, pyoverdine, and the low affinity siderophore, pyochelin. Uptake of the iron-siderophore complexes is an active process that requires specific outer membrane located receptors, which are dependent of the inner membrane-associated protein TonB and two other inner membrane proteins, ExbB and ExbC. P. aeruginosa is also capable of using a remarkable variety of heterologous siderophores as sources of iron, apparently by expressing their cognate receptors. Illustrative of this feature are the 32 (of which 28 putative) siderophore receptor genes observed in the P. aeruginosa PAO1 genome. However, except for a few (pyoverdine, pyochelin, enterobactin), the vast majority of P. aeruginosa siderophore receptor genes still remain to be characterized. Ten synthetic iron chelators of catecholate type stimulated growth of a pyoverdine/pyochelin deficient P. aeruginosa PAO1 mutant under condition of severe iron limitation. Null mutants of the 32 putative TonB-dependent siderophore receptor encoding genes engineered in the same genetic background were screened for obvious deficiencies in uptake of the synthetic siderophores, but none showed decreased growth stimulation in the presence of the different siderophores. However, a double knock-out mutant of ferrienterobactin receptor encoding gene pfeA (PA 2688) and pirA (PA0931) failed to be stimulated by 4 of the tested synthetic catecholate siderophores whose chemical structures resemble enterobactin. Ferric-enterobactin also failed to stimulate growth of the double pfeA-pirA mutant although, like its synthetic analogues, it stimulated growth of the corresponding single mutants. Hence, we confirmed that pirA represents a second P. aeruginosa ferric-enterobactin receptor. The example of these two enterobactin receptors probably illustrates a more general phenomenon of siderophore receptor redundancy in P. aeruginosa. [less ▲]

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See detailAdherence to first-line antiretroviral regimens in Rwanda.
Demeester, Remy; Omes, Christine; Karasi, Jean Claude ULg et al

in Journal of Acquired Immune Deficiency Syndromes [=JAIDS] (2005), 40(1), 113-4

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See detailFish introduction is a major cause of paedomorphosis extinction in European newts (Triturus spp.)
Džukić, Georg; Ćirović, Ruža; Denoël, Mathieu ULg et al

in Froglog (2005), 69

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See detailMise en évidence de la faille de Marenne sur la carte géologique Aye - Marche-en-Famenne
Barchy, Laurent; Coen-Aubert, Marie; Marion, Jean-Marc ULg et al

Poster (2005)

Revision of the geological map Aye-Marche (Belgium, Wallonia) has highlighted a major tectonic fault known as "Marenne fault". Its presence would explain the increased thickness of the Givetian limestones ... [more ▼]

Revision of the geological map Aye-Marche (Belgium, Wallonia) has highlighted a major tectonic fault known as "Marenne fault". Its presence would explain the increased thickness of the Givetian limestones up to the valley of Ourthe river. [less ▲]

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See detailLabor
Durand, Pascal ULg

in Fouché, P.; Péchoin, D.; Schuwer, Ph (Eds.) Dictionnaire encyclopédique du livre (2005)

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See detailKistemaeckers
Durand, Pascal ULg

in Fouché, P.; Péchoin, D.; Schuwer, Ph. (Eds.) Dictionnaire encyclopédique du livre (2005)

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See detailMarabout
Durand, Pascal ULg

in Fouché, P.; Péchoin, D.; Schuwer, Ph. (Eds.) Dictionnaire encyclopédique du livre (2005)

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See detailValorisation des petits bois rouges en Région wallonne
Hebert, Jacques ULg; Bailly, Francine; Brunin, Emmanuelle et al

in Forêt Wallonne (2005), 75(75), 19-31

La forêt wallonne offre aujourd'hui une quantité limitée mais cependant significative de bois rouges de petites dimensions. Malheureusement, ceux-ci ne trouvent généralement pas acquéreur à des prix ... [more ▼]

La forêt wallonne offre aujourd'hui une quantité limitée mais cependant significative de bois rouges de petites dimensions. Malheureusement, ceux-ci ne trouvent généralement pas acquéreur à des prix raisonnables. Cet état de fait tient à une série de griefs, justifiés ou non, attribués à ces produits et sur lesquels nous souhaitons nous arrêter ici. [less ▲]

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See detailPour une définition européenne du tourisme culturel
Teller, Jacques ULg; Dumont, E.; Origet du Cluzeau, C.

in Espaces (2005)

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See detailUn mecanisme physiopathologique central a l'origine des complications du diabete?
Defraigne, Jean-Olivier ULg

in Revue Médicale de Liège (2005), 60(5-6, May-Jun), 472-8

Diabetes mellitus is associated to micro- and macro-vascular lesions responsible for myocardial infarction, nephropathy, retinopathy and polyneuropathy. Four main pathogenic mechanisms have been proposed ... [more ▼]

Diabetes mellitus is associated to micro- and macro-vascular lesions responsible for myocardial infarction, nephropathy, retinopathy and polyneuropathy. Four main pathogenic mechanisms have been proposed, all associated with hyperglycaemia: 1) increased flux in the polyol pathway; 2) increased flux in the hexosamine pathway; 3) protein kinase C activation; and 4) increased formation of advanced glycation endproducts. A common mechanism seems to play a central role in the activation of these various pathways. Indeed, an increased production of free radicals by mitochondria induced by hyperglycaemia may be responsible for the observed metabolic disturbances. The present article describes that theory and presents its possible therapeutic implications. [less ▲]

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See detailRécits de vie. La honte comme biographème universel et singulier
Dawans, Stéphane ULg

in Guillaume, Jean-François (Ed.) Parcours de vie. Regards croisés sur la construction des biographies contemporaines (2005)

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See detailWeakly nonlinear study of Marangoni instabilities in an evaporating liquid layer
Dondlinger, Mireille; Margerit, Jonathan; Dauby, Pierre ULg

in Journal of Colloid & Interface Science (2005), 283(2), 522-532

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See detailLe financement des communes centres. Eclairages de la théorie économique et problèmes fiscaux.
Jurion, Bernard ULg

in Bulletin de Documentation, Service Public Fédéral Finances (2005)

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See detailEtude comparative de la diversité et de la structure génétique de populations sauvages de Phaseolus lunatus L. à l'aide des marqueurs enzymatiques et microsatellites
Ouedraogo, M.; Maquet, A.; Baudoin, Jean-Pierre ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2005), 9(3), 195-205

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See detailDiversity of cucurbit species cultivated in Côte d'Ivoire for Edible Seeds
Zoro Bi, I.; Koffi; Dje, Y. et al

in Cucurbit Genetics Cooperative, Report 2005 (2005), (28-29), 84-90

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