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See detailChemical composition and antimicrobial activity of essential oils of Ocimum basilicum, Ocimum canum and Ocimum gratissimum in function of harvesting time
Mith, Hasika; Yayi-Ladékan, Eléonore; Dosso Sika Kpoviessi, Salomé et al

in Journal of Essential Oil-Bearing Plants [=JEOBP] (2016), 19(6), 1413-1425

The chemical composition of essential oils obtained by hydrodistillation from aerial parts of Ocimum basilicum, Ocimum canum and Ocimum gratissimum from Benin as affected by harvesting time, were analyzed ... [more ▼]

The chemical composition of essential oils obtained by hydrodistillation from aerial parts of Ocimum basilicum, Ocimum canum and Ocimum gratissimum from Benin as affected by harvesting time, were analyzed by GC-FID (Gas chromatography-Flame ionization detector) and GC-MS (Gas chromatography-Mass spectrometry). Based on the composition analysis, major components were as follows: estragol (43.0-44.7%) and linalool (24.6 29.8%) in O. basilicum oils; carvacrol (12.0-30.8%) and p-cymene (19.5-26.2%) in O. canum oils; thymol (28.3-37.7%) and γ-terpinene (12.5-19.3 %) in O. gratissimum oils. Disc diffusion and broth microdilution assays were used to evaluate the antibacterial activity of essential oils and their main components against two foodborne bacteria, Listeria monocytogenes and Salmonella enterica serotype Typhimurium. The tested oils and their components exhibited notable antimicrobial activities against L. monocytogenes and S. Typhimurium. The O. canum and O. gratissimum oils collected at 7h and 19h showed significant higher activities against L. monocytogenes and S. Typhimurium (MICs and MBCs 0.34 - 2.5 μL/mL) (p < 0.05), whereas O. basilicum showed lower activity (MICs and MBCs 2.0 - 8.0 μL/mL) at any daytime of harvest, the weakest being at 19h (MIC and MBC 12.0 - 32.0 μL/mL). The daytime of harvest can influence the composition of oils and their activities on bacteria. [less ▲]

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See detailInvolvement of Ikbζ in glioblastomas and its potential implication in radioresistance
Dubois, Nadège ULg; Willems, Marie; Kroonen, Jérôme et al

Poster (2016, November 29)

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See detailAliments et alimentation dans les sources documentaires coptes : quatre exemples (VIe-VIIIe siècles)
Carlig, Nathan ULg

Conference (2016, November 29)

Study of four Coptic documents on papyrus and ostracon from the sanctuary of St. Colluthus at Antinoopolis and from the Theban Tomb 29, in order to highlight the type of food and their context of use in ... [more ▼]

Study of four Coptic documents on papyrus and ostracon from the sanctuary of St. Colluthus at Antinoopolis and from the Theban Tomb 29, in order to highlight the type of food and their context of use in Byzantine and Early Arab Egypt. [less ▲]

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See detailLe décret relatif aux implantations commerciales et le droit de l’Union européenne : une logique juridique à l’encontre de celle d’un marché intérieur supranational ?
Van Cleynenbreugel, Pieter ULg

Scientific conference (2016, November 29)

This presentation analyses the applicability and relevance of EU law in the application of the Walloon commercial implantation permit decree. It argues that the regional legal framework is overall ... [more ▼]

This presentation analyses the applicability and relevance of EU law in the application of the Walloon commercial implantation permit decree. It argues that the regional legal framework is overall compatible with the spirit of EU law, yet in practice harbours the risk of incompatibilities. [less ▲]

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See detailAspects scientifiques du changement climatique: A quoi devons-nous nous attendre?
Ozer, Pierre ULg

Conference given outside the academic context (2016)

Detailed reference viewed: 20 (1 ULg)
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See detailAnalytical Challenges in the Study of South-North Intra-EU Mobility
Lafleur, Jean-Michel ULg; Stanek, Mikolaj

Conference (2016, November 29)

This presentation discusses the challenges met in measuring the flows of Southern European EU migrants who moved to North Western Europe during the financial and economic crisis that started in 2008. The ... [more ▼]

This presentation discusses the challenges met in measuring the flows of Southern European EU migrants who moved to North Western Europe during the financial and economic crisis that started in 2008. The presentation shows that EU wide and national databases have strenghts and weaknesses and that further improvement in statistical data collection process could help the understanding of complex migratory patterns. More details is available on this research by downloading the free e-bbok at the following address: http://www.springer.com/gp/book/9783319397610 [less ▲]

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See detailThe influence of isoinertial-pneumatic ratio on force-velocity-power relationships
Jidovtseff, Boris ULg; Avrillon, Simon; Hug, François et al

Conference (2016, November 29)

Introduction: Isoinertial contractions are effective to generate maximal force during the initiation of the movement whereas they do not provide an appropriate training stimulus to generate force once ... [more ▼]

Introduction: Isoinertial contractions are effective to generate maximal force during the initiation of the movement whereas they do not provide an appropriate training stimulus to generate force once accelerative phase has been developed (1). Pneumatic resistance is one alternative that has been developed to overcome the aforementioned limitations associated with isoinertial contractions. This technique allow higher initial velocity and reduce the decrease of force towards the end of the concentric phase (1). There is some training interest by combining isoinertial and pneumatic loading. The aim of this study was to determine how different isoinertial-pneumatic ratio influence the force-velocity-power relationships during bench-press. Methods: Fifteen participants performed bench press at 30%, 45%, 60%, 75%, and 90% of their 1RM, with five isoinertial(I)-pneumatic(P) resistance ratio : 100%I/0%P, 75%I/25%P, 50%I/50%P, 25%I/75%P, and 0%I/100%P. Velocity, force and power were assessed using a linear transducer and mechanical parameters measured by the pneumatic ergometer. Force-, velocity- and power-time patterns were averaged over the push-off phase to build the corresponding force-velocity and power-velocity relationships for each resistance ratio. Results: The increase in pneumatic part in resistance ratio elicited higher movement velocity and lower force level from 0% to 80% of the concentric phase. The increase in isoinertial part in resistance balance resulted in higher velocity towards the end of the movement. As a consequence, the use of isoinertial resistance oriented the force-velocity relationship towards force, whereas pneumatic resistance elicited a more velocity-oriented profile. Conclusion: Pneumatic-oriented resistance could be used to develop initial velocity and force towards the end of the push-off. Isoinertial-oriented resistance should be used to develop maximal force and maximal power. Resistance modality could be modulated according to training objectives. Références : 1. Frost et al. A comparison of the kinematics, kinetics and muscle activity between pneumatic and free weight resistance. Eur J Appl Physiol. 2008;104:937-56. [less ▲]

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See detailImportance de l’océan pour la régulation du climat de nos régions
Gobert, Sylvie ULg

Scientific conference (2016, November 29)

Mise en évidence des rôles de l'océan dans notre climat et conséquences des changements actuels

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See detailActive Network Management for Electrical Distribution Systems
Gemine, Quentin ULg

Doctoral thesis (2016)

With the increasing share of renewable and distributed generation in electrical distribution systems, Active Network Management (ANM) has become a valuable option for a distribution system operator to ... [more ▼]

With the increasing share of renewable and distributed generation in electrical distribution systems, Active Network Management (ANM) has become a valuable option for a distribution system operator to operate his system in a secure and cost-effective way without relying solely on network reinforcement. ANM strategies are short-term policies that control the power injected by generators and/or taken off by loads in order to avoid congestion or voltage issues. While simple ANM strategies consist of curtailing temporary excess generation, more advanced strategies instead attempt to move the consumption of loads to anticipated periods of high renewable generation. Such advanced strategies mean that the system operator has to solve large-scale optimal sequential decision-making problems under uncertainty. The problems are sequential for several reasons. For example, decisions taken at a given moment constrain the future decisions that can be taken, and decisions should be communicated to the system’s actors sufficiently in advance to give them enough time for implementation. Uncertainty must be explicitly accounted for because neither demand nor generation can be accurately forecasted. This dissertation presents various research contributions about ANM for distribution systems. These contributions range from the motivation of using a framework of sequential decision-making under uncertainty to the study of computational methods that implement ANM strategies. A particular emphasis is placed on the formulation of the problem, which ultimately falls within the class of Markov decision processes. The modeling of stochasticity is explored and a novel approach that relies on a Gaussian Mixture Model is presented. Computational methods including several relaxations and approximations of multi-period and multi-scenario extensions of the optimal power flow problem with discrete decision variables were considered. [less ▲]

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See detailNeuropathies externes, canalaires et sportives
WANG, François-Charles ULg

Learning material (2016)

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See detailSommes-nous encore en démocratie?
Debras, François ULg; Verjans, Pierre ULg

Conference given outside the academic context (2016)

Detailed reference viewed: 14 (2 ULg)
See detailEtude de la régulation de l'expression de l'opéron ftsW-psr-pbp5 chez Enterococcus hirae
Maréchal, Maxime ULg

Doctoral thesis (2016)

Les entérocoques sont des microorganismes commensaux du tractus digestif de la plupart des animaux mais sont également des pathogènes opportunistes. Lorsque les entérocoques sont associés à une infection ... [more ▼]

Les entérocoques sont des microorganismes commensaux du tractus digestif de la plupart des animaux mais sont également des pathogènes opportunistes. Lorsque les entérocoques sont associés à une infection, la sélection d’un traitement antibiotique adéquat peut s’avérer difficile. Cela est dû à la résistance, intrinsèque ou acquise, des entérocoques à de nombreux antibiotiques. Dans ce travail, nous nous sommes intéressés à leur résistance intrinsèque aux β-lactamines. Un des mécanismes de résistance envers ces antibiotiques est la production d’un PBP de faible affinité. Cependant, le facteur responsable de la surproduction de cette protéine chez les souches présentant un niveau de résistance plus élevé n’est pas encore connu. Ce travail avait pour objectif principal de contribuer à une meilleure compréhension du mécanisme moléculaire responsable de la résistance aux β-lactamines et d’établir le rôle de l’opéron ftsWpsr-pbp5 chez Enterococcus hirae. La première partie de ce travail a été focalisée sur les protéines codées par les gènes ftsW, psr et pbp5. La publication du premier génome d’E. hirae ATCC9790 nous a permis d’identifier et situer dans le génome d’autres gènes codant pour des protéines de la même famille (SEDS pour FtsW, LCP pour Psr, et les autres PBPs pour PBP5). Nous avons produit et purifié ces différentes protéines avec pour visée principale la possibilité d’obtenir des anticorps spécifiques pouvant servir à localiser les protéines au sein de la cellule d’E. hirae. Nous avons établi que la protéine Psr lie le peptidoglycane, se localise avec PBP5 au niveau du site de division et possède des caractéristiques en accord avec une fonction similaire à celle proposée pour d’autres protéines LCP. La seconde partie du travail était axée sur la sélection et l’étude de nouveaux mutants hyperrésistants aux β-lactamines. L’analyse de leur physiologie, de l’expression du PBP5 et de l’environnement génétique du gène pbp5 chez chacun d’eux a été réalisée. Le séquençage du génome de deux mutants a été effectué afin de pouvoir identifier les mutations présentes permettant leur résistance. Des analyses de la force promotrice des séquences en amont de chaque gène de l’opéron ftsW-psr-pbp5 d’E. hirae ont été menées en utilisant le gène rapporteur de la luciférase de luciole. Ces expériences et les mutations observées chez les mutants, nous ont permis d’identifier des éléments régulateurs qui ont une influence sur l’expression de l’opéron ftsW-psr-pbp5. [less ▲]

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See detailQuantum fidelity of symmetric multipartite states
Neven, Antoine ULg; Mathonet, Pierre ULg; Gühne, Otfried et al

in Physical Review A (2016), 94

For two symmetric quantum states one may be interested in maximizing the overlap under local operations applied to one of them. The question arises whether the maximal overlap can be obtained by applying ... [more ▼]

For two symmetric quantum states one may be interested in maximizing the overlap under local operations applied to one of them. The question arises whether the maximal overlap can be obtained by applying the same local operation to each party. We show that for two symmetric multiqubit states and local unitary transformations this is the case; the maximal overlap can be reached by applying the same unitary matrix everywhere. For local invertible operations (stochastic local operations assisted by classical communication equivalence), however, we present counterexamples, demonstrating that considering the same operation everywhere is not enough. [less ▲]

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See detailLes jeux vidéo : un modèle théorique pour la narration transmédia ?
Barnabé, Fanny ULg

Scientific conference (2016, November 28)

Les jeux vidéo peuvent-ils raconter des histoires ? Et, si c’est le cas, quelles sont leurs spécificités narratives ? Ces questions ont longtemps posé problème dans le champ des game studies, car les ... [more ▼]

Les jeux vidéo peuvent-ils raconter des histoires ? Et, si c’est le cas, quelles sont leurs spécificités narratives ? Ces questions ont longtemps posé problème dans le champ des game studies, car les conceptions traditionnelles du « récit » ne permettent pas de décrire de manière satisfaisante les modes de narration propres au médium vidéoludique. Or, à ce titre, le jeu vidéo n’est pas sans rappeler le transmédia : loin de ne représenter les histoires que sous la forme de suites linéaires d’événements, ces deux formats semblent plutôt organiser leur narration en architectures complexes, que nous appellerons des « univers fictionnels ». [less ▲]

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See detailViral glycoprotein gp150 promotes sexual transmission of Murid Herpesvirus-4
Zeippen, Caroline ULg; Javaux, Justine ULg; Xiao, Xue ULg et al

Poster (2016, November 28)

Gammaherpesviruses are important pathogens in human and veterinary medicine. During co-evolution with their hosts, they developed many strategies allowing them to shed infectious particles in presence of ... [more ▼]

Gammaherpesviruses are important pathogens in human and veterinary medicine. During co-evolution with their hosts, they developed many strategies allowing them to shed infectious particles in presence of immune response. Understanding these strategies is likely to be important to control infection. Interestingly, we recently observed that Murid herpesvirus 4 (MuHV-4), a gammaherpesvirus infecting laboratory mice, could be sexually transmitted between mice. This model offers therefore the opportunity to understand the mechanisms underlying natural transmission. Some of these mechanisms could rely on the glycoprotein 150 (gp150), which could limit virus neutralization and promote the release of infectious particles from cells. In this study, we tested therefore the importance of gp150 in the context of MuHV-4 sexual transmission. Briefly, female mice were infected with WT or gp150- strains expressing luciferase. They were imaged with an in vivo imaging system to follow infection. When lytic replication was observed in the genital tract, infected females were mated with naïve males to compare the capacity of transmission of the two strains. Our results show that, while the gp150- strain has no deficit in reaching and replicating in the female genital tract, it displays a major deficit of sexual transmission in comparison with WT virions. Interestingly, this deficit appears to reflect a deficit of virions release from vaginal epithelial cells. Altogether, our results show that, while gp150 is not required for efficient dissemination and maintenance of MuHV-4 within its host, it is essential for efficient transmission, by promoting the releasing of infectious particles from the mucosal cells. [less ▲]

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See detailLesbians and gay men accessing parenthood: opportunities and challenges
Scali, Thérèse ULg

Scientific conference (2016, November 28)

Detailed reference viewed: 19 (1 ULg)
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See detailThe EU’s geo-blocking Regulation proposal and its impact on the coherence of EU e-commerce regulation
Van Cleynenbreugel, Pieter ULg

Scientific conference (2016, November 26)

This presentation analyses and contextualises the EU's proposed geo-blocking regulation and its relationship to EU e-commerce legislation. It is addressed to an audience of cyberspace and e-law lawyers ... [more ▼]

This presentation analyses and contextualises the EU's proposed geo-blocking regulation and its relationship to EU e-commerce legislation. It is addressed to an audience of cyberspace and e-law lawyers and takes place in an ecommerce panel. Questions to be discussed concern the approach taken by the EU in tackling the challenges of e-commerce. [less ▲]

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See detailReturn to play after injection of PRP to treat tendinopathies
Kaux, Jean-François ULg

Conference (2016, November 26)

Detailed reference viewed: 34 (1 ULg)