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See detailCritical role of tryptophan 154 for the activity and stability of class D beta-lactamases.
Baurin, Stephane; Vercheval, Lionel ULiege; Bouillenne, Fabrice ULiege et al

in Biochemistry (2009), 48(47), 11252-63

The catalytic efficiency of the class D beta-lactamase OXA-10 depends critically on an unusual carboxylated lysine as the general base residue for both the enzyme acylation and deacylation steps of ... [more ▼]

The catalytic efficiency of the class D beta-lactamase OXA-10 depends critically on an unusual carboxylated lysine as the general base residue for both the enzyme acylation and deacylation steps of catalysis. Evidence is presented that the interaction between the indole group of Trp154 and the carboxylated lysine is essential for the stability of the posttranslationally modified Lys70. Substitution of Trp154 by Gly, Ala, or Phe yielded noncarboxylated enzymes which displayed poor catalytic efficiencies and reduced stability when compared to the wild-type OXA-10. The W154H mutant was partially carboxylated. In addition, the maximum values of k(cat) and k(cat)/K(M) were shifted toward pH 7, indicating that the carboxylation state of Lys70 is dependent on the protonation level of the histidine. A comparison of the three-dimensional structures of the different proteins also indicated that the Trp154 mutations did not modify the overall structures of OXA-10 but induced an increased flexibility of the Omega-loop in the active site. Finally, the deacylation-impaired W154A mutant was used to determine the structure of the acyl-enzyme complex with benzylpenicillin. These results indicate a role of the Lys70 carboxylation during the deacylation step and emphasize the importance of Trp154 for the ideal positioning of active site residues leading to an optimum activity. [less ▲]

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See detailCritical specific stream power in gravel-bed rivers
Petit, François ULiege; Gob, Frédéric ULiege; Houbrechts, Geoffrey ULiege et al

in Geomorphology (2005), 69(1-4), 92-101

Experiments with marked pebbles were carried out on different sized rivers of the Belgian Ardenne (catchment areas varying from less than I km(2) to 2700 km(2)). Specific stream power required to cause ... [more ▼]

Experiments with marked pebbles were carried out on different sized rivers of the Belgian Ardenne (catchment areas varying from less than I km(2) to 2700 km(2)). Specific stream power required to cause bedload movement was evaluated and critical values were obtained. Three types of relationship between critical specific stream power (omega(0)) and grain size (D) were established. The values for coo in the largest river (the Ourthe) were the lowest and were close to the values obtained for mountainous rivers carrying large boulders. In medium sized rivers (catchment area between 40 and 500 km(2)), the critical unit stream power was higher. It is likely that it is due to the bedform's greater resistance. This resistance would use up some of the energy that can cause movement and transport of bedload. The amount of resistance of the bedform can be expressed as bedform shear stress (tau ''), determined by the relationship between grain shear stress (tau'-that determines movement and transport of the bedload) and the total shear stress (tau). This ratio varies between 0.4 and 0.5 in the medium sized rivers, compared to 0.7 in the Ourthe. In headwater streams (less than 20 km(2)), there is greater loss of energy due to bedform resistance (tau'/tau < 0.3). Critical specific stream power is higher in this third type of river than in the other two. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

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See detailCritical state modelling of crossed field demagnetisation in HTS materials
Swartz, J. P.; Mc Culloch, M. D.; Pecher, R. et al

in Andreone, A.; Pepe, G. P.; Cristiano, R. (Eds.) et al Applied Superconductivity 2003 (Proceedings of the 6th European Conference on Applied Superconductivity) (2004)

Large magnetic fields can be trapped in high temperature superconductor material, enabling their use as permanent magnets in various applications. It has, however, been observed that these materials ... [more ▼]

Large magnetic fields can be trapped in high temperature superconductor material, enabling their use as permanent magnets in various applications. It has, however, been observed that these materials experience a decay in magnetisation when a field is applied in a direction transverse to the trapped field. This paper presents the results of critical state modelling of an infinite slab of superconductor that is first fully magnetised and then exposed to magnetic field in the transverse direction. The bean and double critical state model are implemented and the results compared to each other and to that of physical experiment. The convergence of the decay is investigated as well as the effect of the magnitude of the crossed field on the final decay value. Diamagnetic and paramagnetic initial conditions are applied to the material and the results used to compare the accuracy of the bean and double critical state model. [less ▲]

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See detailA Critical Study of Primate Reintroduction Projects in the Mesoamerican Region.
Martin, Sarah ULiege; Huynen, Marie-Claude ULiege; Libois, Roland ULiege

Poster (2008)

Very little is known about primate reintroduction projects in Mesoamerica. The aim of this study was to focus on existing projects concerning primate re-introductions, conservation-introduction ... [more ▼]

Very little is known about primate reintroduction projects in Mesoamerica. The aim of this study was to focus on existing projects concerning primate re-introductions, conservation-introduction, translocation, as well as on reinforcement-supplementation of parallel initiatives. In order to create a database, a survey was sent to a panel of scientists in Mexico, Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica and Panama, and we visited five projects in Costa Rica from March to August 2006. A total of 19 projects were found: Costa Rica hosted the higher number (7) while Salvador and Nicaragua did not host any. Fourteen out of those 19 projects concerned confiscated animals. Six of the 7 Costa Rican projects used confiscated primates; the other ones came from wild populations or were born in captivity. Alouatta palliata and Ateles geoffroyi are the most common species subject to reintroduction effort in the Mesoamerican region. A wide range of factors seem to influence reintroduction success such as: the project’s budget, the release site, the mode of transportation, the caging setting, the support from local communities, the presence of environmental education programs, but also the age of primates, etc. Each project seems to work as a completely separated entity, with its own definition of reintroduction success and its own policy. There’s no communication between the projects, no matter if they are based in the same country or work on the same species. A reintroduction guideline for this region should be established as well as a regional network coordinating the information. [less ▲]

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See detailCritical survey of hierarchical methods for state estimation of electric power systems
Van Cutsem, Thierry ULiege; Pavella, Mania ULiege

in IEEE Transactions on Power Apparatus and Systems (1983), 102

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See detailCritical thickness for ferroelectricity in perovskite ultrathin films
Junquera, J.; Ghosez, Philippe ULiege

in Nature (2003), 422(6931), 506-509

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See detailCritical use of transcranial magnetic stimulation in psychiatry.
Desseilles, Martin ULiege

Scientific conference (2008, May 23)

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See detailA critical view on the parametric fire model of Eurocode 1
Franssen, Jean-Marc ULiege

Scientific conference (2006, May 31)

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See detailCriticality of trapping in a dynamic epidemic model
Vandewalle, Nicolas ULiege; Ausloos, Marcel ULiege

in Journal of Physics : A Mathematical & General (1996), 29(2), 309-316

We study a simple model mimicking the two-dimensional growth of a solid interface B through a liquid L in presence of particles A which are pushed by the advancing front. The model considers a short-range ... [more ▼]

We study a simple model mimicking the two-dimensional growth of a solid interface B through a liquid L in presence of particles A which are pushed by the advancing front. The model considers a short-range repulsive interaction between the particles and the advancing front (the so-called Uhlmann, Chalmers and Jackson mechanism). As particles are pushed by the advancing front, this leads to the formation of aggregates which are hindrances to the growth and which can be trapped leading to the formation of internal patterns. A transition between indefinitely growing clusters and frozen ones takes place for a critical particle fraction x(c) = 0.560 +/- 0.005 which is larger than the critical fraction of the corresponding epidemic model with static particles. At that critical threshold x, both percolating clusters and internal patterns are numerically found to be fractal with the same dimension D-f = 1.87 +/- 0.03 close to the classical percolation exponent 91/48. The correlation length exponent v is found to be v = 1.34 +/- 0.08 close to the classical percolation exponent 4/3. The criticality of the internal patterns is unexpected. [less ▲]

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See detailCriticism and engagement in the Belle Epoque. The autonomy of literature and the social function of the writer during the third Republic
Denis, Benoît ULiege

in Dorleijn, Gillis J.; Grüttemeier, Ralph; Korthals Altes, Liesbeth (Eds.) The Autonomy of Literature at the Fins de Siècle (1900 and 2000) (2007)

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See detailCriticism of Society in the English Novel Between the Wars
Maes-Jelinek, Hena ULiege

Book published by Les Belles Lettres (1970)

The main concern of this study is the artist’s vision of society; its major theme is the relation between the individual and society resulting from the impact of social and political upheavals on ... [more ▼]

The main concern of this study is the artist’s vision of society; its major theme is the relation between the individual and society resulting from the impact of social and political upheavals on individual life. By criticism of society I mean the novelist’s awareness of the social reality and of the individual’s response to it; the writers I deal with all proved alive to the changes that were taking place in English society between the two World Wars. Though the social attitudes of the inter-war years as well as the writers’ response to them were shaped by lasting and complex influences, such as trends in philosophy and science, the two Wars stand out as determining factors in the development of the novel: the consequences of the First were explored by most writers in the Twenties, whereas in the following decade the novelists felt compelled to voice the anxiety aroused by the threat of another conflict and to warn against its possible effects. After the First World War many writers felt keenly the social disruption: the old standards, which were thought to have made this suicidal War possible, were distrusted; the code of behaviour and the moral values of the older generation were openly criticized for having led to bankruptcy. Disparagement of authority increased the individual’s sense of isolation, his insecurity, his disgust or fear. Even the search for pleasure so widely satirized in the Twenties was the expression of a cynicism born of despair. The ensuing disengagement of the individual from his environment became a major theme in the novel: his isolation was at once a cause for resentment and the source of his fierce individualism. [less ▲]

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See detailDe criticus is een gnoe. Een gesprek met Hugo Brems
Spinoy, Erik ULiege; Vandevoorde, Hans

in Yang : Tijdschrift voor Literatuur en Kommunikatie (1991), 27(152), 75-94

This is the text of an interview with Hugo Brems, one of the foremost academic critics of and experts on contemporary Dutch and Flemish poetry.

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See detailLa critique cinématographique : Analyse des contrats de lecture proposés dans la presse traditionnelle d’aujourd’hui
Krywicki, Boris ULiege

Master's dissertation (2015)

De nos jours, l’on constate l’existence de nombreuses alternatives à la critique cinématographique que l’on peut trouver dans la presse traditionnelle. La critique a beaucoup été chahutée au fil du temps ... [more ▼]

De nos jours, l’on constate l’existence de nombreuses alternatives à la critique cinématographique que l’on peut trouver dans la presse traditionnelle. La critique a beaucoup été chahutée au fil du temps : remise en question de la légitimité des journalistes spécialisés, soupçons d’un dénigrement du cinéma populaire, accusation d’être réservée à une élite culturelle… Le genre a changé significativement, tentant de s’adapter à une industrie en constante évolution. Aujourd’hui, l’on peut voir de nouvelles formes émerger sur Internet, de la critique en vidéo sur Youtube à l’avis succinct laissé sur un réseau social. Malgré tout, la critique traditionnelle semble s’en tenir à certains réflexes et aux fondamentaux de la fonction critique. Face à l’opposition entre ces évolutions et ce conservatisme, l’on pourrait s’interroger sur le changement des attentes des lecteurs de critiques. Sont-elles restées les mêmes que dans les années 50, aux débuts des Cahiers du cinéma ? Les réflexes des journalistes spécialisés restent-ils adaptés ? Si nouvelle forme de critique il y a, ne correspond-elle pas à de nouveaux contrats de lecture ? Il nous a semblé intéressant de scruter la critique sous le point de vue de la relation qu’elle propose à son lecteur. [less ▲]

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See detailCritique clinique et phénoménologique de l’objectivation diagnostique : réflexions sur la personnalité antisociale et la psychopathie
Adam, Christophe; Englebert, Jérôme ULiege

Conference (2017, April 19)

L’atelier propose une réflexion épistémologique sur les outils nosographiques dominants le champ de la psychologie clinique et de la psychiatrie. Notre propos se centrera sur une analyse critique de la ... [more ▼]

L’atelier propose une réflexion épistémologique sur les outils nosographiques dominants le champ de la psychologie clinique et de la psychiatrie. Notre propos se centrera sur une analyse critique de la personnalité antisociale selon les DSM-IV et -5 et du diagnostic de psychopathie selon la PCL-R. Inscrit dans le champ de la phénoménologie clinique et d’une lecture dynamique de la psychopathologie, notre propos s’appuiera sur plusieurs situations cliniques. [less ▲]

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See detailLa critique dans l'université contemporaine. Responsabilité et complexité.
Bachelet, Jean-François ULiege

Conference (2017, September 28)

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See detailLa critique dans la pratique sociologique : questions introductives
Jacquemain, Marc ULiege

in Recherches (2008), 5

Defending a critical position in sociology depends simultaneously on a triple choice by the researcher in the fields of ontology, epistemology and ethics. From an ontological point of view, the social may ... [more ▼]

Defending a critical position in sociology depends simultaneously on a triple choice by the researcher in the fields of ontology, epistemology and ethics. From an ontological point of view, the social may be defined as primarily holistic, atomistic, or as being the result of mutual structuration by the parts and the whole. Espitemologically, the position of the researcher may be more realist (social phenomena do exist independantly from our point of view about them) or more constructivist (social phenomena are essentially what people or researchers think they are). considering ethics, the social researcher may act rather as an expert (leaving to the funder of the research the question of the relevance of the object to be investigated) or rather as an intellectual (that chooses himself what is worth investigating or not). The relation between sociology and critics depends crucially on what position the researcher takes within this tri-dimensional frame. [less ▲]

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See detailLa critique dans la pratique sociologique
Jacquemain, Marc ULiege

Scientific conference (2007, June)

La posture critique que peut adopter le sociologue dépend de trois présupposés : éthique, ontologique, et épistémologique. Du point de vue ontologique, le sociologue peut voir le social comme holiste ... [more ▼]

La posture critique que peut adopter le sociologue dépend de trois présupposés : éthique, ontologique, et épistémologique. Du point de vue ontologique, le sociologue peut voir le social comme holiste, individualiste ou relationaliste. Du point de vue épistémique, il peut adopter une posture réaliste ou constructiviste, et du point de vue éthique, il peut adopter une posture de neutralité (expert) ou d'engagement (intellectuel). La critique se déploiera très différemment selon les combinaisons de posture adoptées. [less ▲]

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See detailLa critique dans les revues d’architecture à Liège dans le contexte de l’activité éditoriale belge de l’Entre-deux-guerres.
Charlier, Sébastien ULiege

Scientific conference (2017, May 18)

Loin de présenter un visage uniforme, la critique s’exprimant dans les revues d’architecture de l’entre-deux-guerres répond à des enjeux multiples et repose sur diverses postures qui peuvent être ... [more ▼]

Loin de présenter un visage uniforme, la critique s’exprimant dans les revues d’architecture de l’entre-deux-guerres répond à des enjeux multiples et repose sur diverses postures qui peuvent être publicitaires, doctrinaires ou corporatistes. Sur base de cette classification, cette communication propose d’analyser La Technique des travaux (1925-1940), L’Équerre (1928-1939) et Le Rez-de-chaussée (1928), trois revues dont la naissance est située à Liège, ville belge de seconde importance. En les caractérisant à la lumière d’organes similaires à portée nationale, elle entend montrer la diversité des profils de ceux qui se sont engagés dans la critique architecturale. Car tous les critiques ne sont pas architectes, loin de là. [less ▲]

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