References of "2012"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailAnalgésie péridurale obstétricale et lombalgie du post-partum: un lien de cause à effet?
CHARLIER, Vanessa ULg; Brichant, Géraldine ULg; DEWANDRE, Pierre-Yves ULg et al

in Revue Médicale de Liège (2012), 67(1), 16-20

backache is a common problem in the general population. the prevalence of backpain is increased during pregnancy and after delivery. early studies have suggested that labor epidural analgesia might be ... [more ▼]

backache is a common problem in the general population. the prevalence of backpain is increased during pregnancy and after delivery. early studies have suggested that labor epidural analgesia might be associated with an increased incidence of backache in the postpartum period. However, these initial studies were retrospective and their design included several methodological deficiencies. All the prospective studies published afterwards (prospective cohort studies and 3 ran- domized controlled trials) yield the same result : there is no relationship between labor epidural analgesia and long-term postpartum backpain. pregnant women must be aware of this in order to make an informed and appropriate choice about labor epidural analgesia, the most effective technique for intra- partum pain relief. [less ▲]

Detailed reference viewed: 349 (21 ULg)
Full Text
Peer Reviewed
See detailProbability of detection and positioning error of a hydro acoustic telemetry system in a fast-flowing river: intrinsic and environmental determinants
Bergé, Julien; Capra, Hervé; Pella, Hervé et al

in Fisheries Research (2012), 125-126

In situ fixed acoustic telemetry methods make it possible to study simultaneously the detailed movements of individual fish and their relationship to the environment, but the properties of these methods ... [more ▼]

In situ fixed acoustic telemetry methods make it possible to study simultaneously the detailed movements of individual fish and their relationship to the environment, but the properties of these methods is little known in harsh physical conditions. We examined the probability of tag detection by the system and the positioning error for detected tags of an existing telemetry system installed with 32 fixed hydrophones in a reach of the fast-flowing Rhône River in France. The reach was 1.8 km long and had heterogeneous thermal and hydraulic conditions described by a two-dimensional hydraulic model. We compared positions detected by the system with true positions estimated using a tachometer or a differential GPS, for various sets of experimental tag emissions. We analyzed how the probability of detection and the positioning error were affected by user-defined variables and three groups of environmental variables describing the configuration of the hydrophones around tag position, the physical environment at tag position and the reception quality. Tag emissions from the center channel had an average probability of detection (40-50%) higher than emissions originating from positions close to the banks, and were positioned with smaller average errors (3-5 m). The probability of detection of emissions typically varied between near 0% and 80% with configuration variables (density of surrounding hydrophones and location of tag relative to the hydrophones) and also decreased in the presence of coarse substrate. The positioning error was mainly reduced when user-defined variables of the triangulation software were set by an expert user. Configuration variables also influenced the positioning error with weaker effects than those observed for detection probability. [less ▲]

Detailed reference viewed: 89 (8 ULg)
Full Text
Peer Reviewed
See detailClaude Lévi-Strauss et les formes symboliques de la musique
Ledent, David ULg

in Homme (L') : Revue Française d'Anthropologie (2012), 201

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailRestructurations d'entreprises et reconversion territoriale. Vers une institutionnalisation adaptative.
Naedenoen, Frédéric ULg; Pichault, François ULg

in Revue Française de Gestion (2012), 38(n°220), 133-147

The usual way of analyzing the challenges of territorial governance in a restructuring context lies on a planning vision of industrial strategies: once the announcement is operated, a series of events ... [more ▼]

The usual way of analyzing the challenges of territorial governance in a restructuring context lies on a planning vision of industrial strategies: once the announcement is operated, a series of events will occur following a sequential path. Few territorial studies refer to emergent restructuring processes or even to dramatic strategic reorientations. By comparing the evolving practices of two territorial actors, directly concerned with the strategic jolts of the restructuring process undertaken by the ArcelorMittal steel group, this paper scrutinizes the conditions under which one of them seems to answer this changing context with more efficacy than the other. The emphasis is put on what we propose to call a process of ‘adaptive institutionalization”, in which the actor in charge of territorial governance is able to cope with contextual variations while maintaining the stakeholders involved. [less ▲]

Detailed reference viewed: 89 (25 ULg)
Full Text
See detailAnthracologie : perturbations passées et évolution de la végétation
Morin-Rivat, Julie ULg

in CoForChange - La Lettre (2012)

Mettre en évidence la relation entre occupation humaine et distribution de la végétation est l’un des points abordés par CoForChange. Les récentes études montrent que les perturbations anthropiques ont eu ... [more ▼]

Mettre en évidence la relation entre occupation humaine et distribution de la végétation est l’un des points abordés par CoForChange. Les récentes études montrent que les perturbations anthropiques ont eu une influence sur la végétation, permettant notamment l’expansion des espèces héliophiles (cf. Lettre n° 4). Pour contribuer à cette analyse dans un contexte de grande rareté des données anthracologiques en Afrique, nous avons, dans le cadre d’un master, choisi d’étudier les charbons de bois issus de neuf fosses pédologiques du projet CoForChange. L’objectif était d’appréhender les compositions floristiques actuelle et passée des forêts au regard des perturbations passées. Deux protocoles anthracologiques d’identification ont été testés : a) à l’échelle de l’espèce, par une description des caractères anatomiques des charbons de bois, une recherche sur la base de données en ligne InsideWood et une comparaison anatomique au Xylarium de Tervuren ; b) à l’échelle de la communauté, par une recherche des relations statistiques entre traits écologiques des espèces et anatomie du bois. Les résultats montrent que la diversité taxonomique sous les forêts à Marantaceae est plus grande que sous les forêts denses de terre ferme. Trois identifications ont été obtenues sur 48 taxons décrits : Gilbertiodendron dewevrei sous forêt monodominante à G. dewevrei (GIB1 à 40 cm de profondeur, 1 510 ± 30 années cal. BP (calibrated before present), Millettia drastica et Pterocarpus soyauxii sous forêt clairsemée à Marantaceae (F9 à 40 cm, 1 200 ± 30 cal. BP). Notre hypothèse est que les peuplements monodominants à G. dewevrei sont relativement stables. Quant à P. soyauxii, la proportion de cette espèce héliophile semble décroître au cours du temps (niveaux entre 20 et 40 cm) au profit desMarantaceae. Un autre résultat porte sur l’absence de Triplochiton scleroxylon sous T. scleroxylon, ce qui pourrait confirmer l’hypothèse du caractère récent de ces peuplements. Les résultats portant sur la relation entre anatomie du bois et traits fonctionnels restant préliminaires, cette recherche sera poursuivie en thèse de doctorat. Les développements actuels de l’anthracologie pour l’Afrique tropicale permettent désormais d’envisager un plus grand nombre d’identifications par échantillon et ainsi une meilleure connaissance de l’évolution des forêts tropicales. [less ▲]

Detailed reference viewed: 138 (12 ULg)
Full Text
Peer Reviewed
See detailMyeloperoxidase in Equine Semen: Concentration and Localization during Freezing Processing
Ponthier, Jérôme ULg; Desvals, Maud; Franck, Thierry ULg et al

in Journal of Equine Veterinary Science (2012), (32), 32-37

Myeloperoxidase (MPO) is a pro-oxidant enzyme contained in and released by neutro- phils during degranulation or after lysis. Post-thaw semen contains MPO, and concen- tration of this enzyme is associated ... [more ▼]

Myeloperoxidase (MPO) is a pro-oxidant enzyme contained in and released by neutro- phils during degranulation or after lysis. Post-thaw semen contains MPO, and concen- tration of this enzyme is associated with decreased motility. The aim of this study was to determine kinetics of MPO concentration during freezing, its origin, and its impact on frozenethawed semen. Forty ejaculates were used. Semen was frozen using the classical freezing procedure. MPO concentrations were assayed in fresh semen, after centrifuga- tion, and after cooling down to 4 C. Post-thaw MPO assay results and spermogram characteristics were determined. MPO immunocytochemistry was performed on 4 different ejaculates at each step of freezing procedure. MPO concentration increased after cooling down to 4 C and thawing compared with fresh semen. As temperature decreased, MPO was higher or tended to be higher in post-thaw poor quality samples. Nonsperm cells showed various degrees of MPO immunostaining and were observed as epithelial cells with nuclear pyknosis and keratinization. MPO immunostaining increased in medium and decreased in nonsperm cells during freezing. Our study shows that MPO concentration in equine semen increases when temperature decreases. We hypothesize that nonsperm cells present in fresh semen could release MPO. [less ▲]

Detailed reference viewed: 66 (17 ULg)
Full Text
See detailProposition d’un indice de composition phytoplanctonique dans les masses d'eau côtières méditerranéennes
Goffart, Anne ULg

Scientific conference (2012, January)

Les indices de composition phytoplanctonique développés en eaux côtières reposent presque toujours sur les inventaires floristiques mais : - ils sont complexes et difficiles à utiliser par les ... [more ▼]

Les indices de composition phytoplanctonique développés en eaux côtières reposent presque toujours sur les inventaires floristiques mais : - ils sont complexes et difficiles à utiliser par les gestionnaires, - très souvent, les espèces d’un même genre ou d’une même classe sont regroupées et une grande partie de l’information, longue à obtenir et couteuse, n’est pas valorisée. Des travaux ont été menés pour développer un indice de composition alternatif qui utilise la signature pigmentaire du phytoplancton comme méthode de détermination rapide de la composition des communautés (projet ONEMA 2010). Ils ont permis de développer l’indice IC Medit dont l'état d'avancement est présenté. [less ▲]

Detailed reference viewed: 7 (2 ULg)
Full Text
Peer Reviewed
See detailProposition de redéfinition pragmatique des bâtiments net-zéro énergie
Moeseke, Goffrey; Attia, Shady ULg; Massart, Catherine et al

in Symposium PassiveHouse 2012 (2012, January)

La notion de NZEB, en tant qu’indicateur de performance, doit répondre à un triple objectif de rigueur scientifique, d'ambition proportionnelle à l'enjeu et de pragmatisme. Nous montrons que la définition ... [more ▼]

La notion de NZEB, en tant qu’indicateur de performance, doit répondre à un triple objectif de rigueur scientifique, d'ambition proportionnelle à l'enjeu et de pragmatisme. Nous montrons que la définition actuelle des NZEB ne répond pas de façon optimale à ces 3 exigences. Dès lors, nous proposons une autre approche de la performance énergétique des bâtiments, centrée sur la dissociation des indicateurs et leur évaluation relative aux potentiels et contraintes du projet d’architecture. Plus qu’une redéfinition, le résultat de cet article est l’embryon d’un outil de guidance énergétique parallèle aux étapes de développement d'un projet. [less ▲]

Detailed reference viewed: 44 (4 ULg)
Full Text
Peer Reviewed
See detailThe limits of the economic value in measuring the global performance of social innovation
Mertens de Wilmars, Sybille ULg; Marée, Michel ULg

in Nicholls Alex; Murdock Alex (Eds.) Social innovation : Blurring boundaries to reconfigure markets (2012)

Detailed reference viewed: 394 (75 ULg)
Full Text
Peer Reviewed
See detailReconstruction of a human mitochondrial complex I mutation in the unicellular green alga Chlamydomonas.
Larosa, Véronique ULg; Coosemans, Nadine ULg; Motte, Patrick ULg et al

in Plant Journal (The) (2012), 70

Defects in complex I (NADH:ubiquinone oxidoreductase) are the most frequent cause of human respiratory disorders. The pathogenicity of a given human mitochondrial mutation can be difficult to demonstrate ... [more ▼]

Defects in complex I (NADH:ubiquinone oxidoreductase) are the most frequent cause of human respiratory disorders. The pathogenicity of a given human mitochondrial mutation can be difficult to demonstrate because the mitochondrial genome harbors large numbers of polymorphic base changes that have no pathogenic significance. In addition, mitochondrial mutations are usually found in the heteroplasmic state, which could hide the biochemical effect of the mutation. We propose that the unicellular green alga Chlamydomonas could be used to study such mutations because (1) respiratory-deficient mutants are viable and mitochondrial mutations are found in the homoplasmic state, (2) transformation of the mitochondrial genome is feasible, (3) Chlamydomonas complex I is close to that of humans. To illustrate that, we have introduced a Leu157Pro substitution in the Chlamydomonas ND4 subunit of complex I of two different recipient strains by biolistic transformation, demonstrating that site-directed mutagenesis of the Chlamydomonas mitochondrial genome is possible. This substitution did not lead to any respiratory enzyme defect when it is present in the heteroplasmic state in a patient presenting chronic progressive external ophthalmoplegia. When present in the homoplasmic state in the alga, the mutation does not prevent the assembly of the 950 kDa whole complex I which conserves nearly all the NADH dehydrogenase activity of the peripheral arm. However, the NADH:duroquinone oxidoreductase activity is strongly reduced, suggesting that the substitution could affect ubiquinone fixation to the membrane domain. The in vitro defects are correlated in vivo with a decrease in dark respiration and growth rate. [less ▲]

Detailed reference viewed: 53 (9 ULg)
Full Text
Peer Reviewed
See detailThe CphAII protein from Aquifex aeolicus exhibits a metal-dependent phosphodiesterase activity
Kupper, Michaël; Bauvois, Cédric; Frère, Jean-Marie ULg et al

in Extremophiles : Life Under Extreme Conditions (2012), 16(1)

The CphAII protein from the hyperthermophile Aquifex aeolicus shows the five conserved motifs of the metallo-β-lactamase (MBL) superfamily and presents 28% identity with the Aeromonas hydrophila subclass ... [more ▼]

The CphAII protein from the hyperthermophile Aquifex aeolicus shows the five conserved motifs of the metallo-β-lactamase (MBL) superfamily and presents 28% identity with the Aeromonas hydrophila subclass B2 CphA MBL. The gene encoding CphAII was amplified by PCR from the A. aeolicus genomic DNA and overexpressed in Escherichia coli using a pLex-based expression system. The recombinant CphAII protein was purified by a combination of heating (to denature E. coli proteins) and two steps of immobilized metal affinity chromatography. The purified enzyme preparation did not exhibit a β-lactamase activity but showed a metal-dependent phosphodiesterase activity versus bis-p-nitrophenyl phosphate and thymidine 5'-monophosphate p-nitrophenyl ester, with an optimum at 85°C. The circular dichroism spectrum was in agreement with the percentage of secondary structures characteristic of the MBL αββα fold. [less ▲]

Detailed reference viewed: 11 (0 ULg)
Full Text
See detailThe Values of the European Union : Elements of a European Identity
Michel, Quentin ULg

Learning material (2012)

Detailed reference viewed: 59 (7 ULg)
Full Text
Peer Reviewed
See detailSecteur Régulé : La Commission européenne condamne l’opérateur historique polonais de télécommunications pour avoir abusé de sa position dominante en entravant l’accès de nouveaux entrants au marché de l’Internet
Sibony, Anne-Lise ULg; Marty, Frédéric

in Concurrences : Revue des Droits de la Concurrence (2012), 1-2012

Comm. eur., 22 juin 2011, Telekomunikacja Polska, aff. COMP/39525 La Commission européenne condamne l’opérateur historique polonais de télécommunications pour avoir abusé de sa position dominante en ... [more ▼]

Comm. eur., 22 juin 2011, Telekomunikacja Polska, aff. COMP/39525 La Commission européenne condamne l’opérateur historique polonais de télécommunications pour avoir abusé de sa position dominante en entravant l’accès de nouveaux entrants au marché de l’Internet. [less ▲]

Detailed reference viewed: 58 (5 ULg)
Full Text
Peer Reviewed
See detailEquine coital exanthema and its potential économic implications for the equine industry
Barrandeguy, M.; Thiry, Etienne ULg

in Veterinary Journal (2012), 191

Detailed reference viewed: 19 (1 ULg)
Full Text
Peer Reviewed
See detailSome improvements of the S-adic conjecture
Leroy, Julien ULg

in Advances in Applied Mathematics (2012), 48(1), 79--98

Detailed reference viewed: 18 (3 ULg)
Full Text
See detailLe casier judiciaire – Fiche pratique
Seron, Vincent ULg

in Journal du Droit des Jeunes (2012), 311

Detailed reference viewed: 84 (14 ULg)
Full Text
See detailla méthode conductive selon Petho
Battisti, Oreste ULg

Learning material (2012)

introduction et illustration par un film de la méthode conductive selon Petho, avec le film "je veux le faire tout seul"

Detailed reference viewed: 109 (5 ULg)