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See detailThe Vacuum UV Photoabsorption Spectrum of the Geminal Dichloroethylene (1,1-C2H2Cl2) in the 5-20 eV Range. A Vibrational Analysis of the Valence and Rydberg States.
Locht, Robert ULiege; Dehareng, Dominique; Leyh, Bernard ULiege

in Journal of Physics Communications (2017), 1(04), 5013

The vacuum UV photoabsorption spectrum of 1,1-C2H2Cl2 is presented and discussed in detail in the 6 - 20 eV photon energy range. The broad band observed at 6.488 eV includes the 2b1()→σ*, 2b1()→ ... [more ▼]

The vacuum UV photoabsorption spectrum of 1,1-C2H2Cl2 is presented and discussed in detail in the 6 - 20 eV photon energy range. The broad band observed at 6.488 eV includes the 2b1()→σ*, 2b1()→* valence transitions and the 2b1()→3s Rydberg transitions. A quantum chemical calculation analysis is proposed and applied to the intertwined vibrational structure belonging to these transitions. For the →σ* and →* transitions short vibrational progressions are observed, analyzed and tentatively assigned. The →3s Rydberg transition is characterized by a single progression starting at 6.746 eV. The fine structure observed between 7.5 eV and 10.1 eV has been analyzed in terms of vibronic transitions to ns- (δ= 0.89), np- (δ= 0.59 and 0.37) and nd-type (δ= 0.16) Rydberg states all converging to the 1,1-C2H2Cl2+( 2B1) ionic ground state. The vibrational structure analysis excitation leads to the following wavenumbers: ω2≈ 1310 cm-1 (162 meV), ω4≈ 650 cm-1 (81 meV) and ω5≈ 290 cm-1 (37 meV). These modes can be assigned to the C=C stretching, to the symmetric C-Cl stretching and to the symmetric Cl-C-Cl bending vibrations respectively. By the same way, eight other Rydberg states were analyzed. For the first time the vacuum UV spectrum of 1,1-C2H2Cl2 has been recorded in the 10 eV-20 eV range, revealing intense broad bands which are assigned to transitions to Rydberg states converging to excited states of 1,1-C2H2Cl2+. Assignments are also proposed for the vibrational excitations observed in this range. [less ▲]

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See detailEntre piété et faste. Réflexions sur le mécénat artistique des collaborateurs du pape Léon X (1513-1521)
Trizzullo, Eva ULiege

Conference given outside the academic context (2017)

Detailed reference viewed: 16 (4 ULiège)
See detailDrei Sprachen, drei Kulturräume, ein Land : eine Einführung in den belgischen Föderalismus
Behrendt, Christian ULiege

Conference given outside the academic context (2017)

Speech given at a Belgian-German Rotary meeting in Tongeren, Belgium, on November 14, 2017.

Detailed reference viewed: 31 (1 ULiège)
See detailThe Other Self: Some Thoughts on Player-Avatar Relationships
Delbouille, Julie ULiege

Scientific conference (2017, November 14)

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See detailSowing flower strips in a wheat field to enhance biological control of aphids and support pollinators
Amy, Clara ULiege; Brigode, Mélanie ULiege; Hatt, Séverin ULiege et al

Poster (2017, November 14)

Insect pests are responsible, among other factors, for reducing the productivity of crops. While chemical insecticides used to control them cause harmful effects on human health and the environment ... [more ▼]

Insect pests are responsible, among other factors, for reducing the productivity of crops. While chemical insecticides used to control them cause harmful effects on human health and the environment, conservation biological control, i.e. managing habitats in agricultural landscapes to support pest natural enemies, turns out to be a promising approach. Moreover, the decline of pollinators in agricultural areas is observed since a few decades, being partly due to the intensification of agriculture which homogenizes and degrades agricultural landscape. To reduce the detrimental effects of agricultural intensification on biodiversity, ecosystem functioning and ecosystem services, farmers have the opportunity to adopt agri-environmental measures. Among them, the establishment of flower strips, with a recognized interest in biological control and the conservation of pollinators, is proposed. However, their establishment is not systematically efficient and profitable for the farmers. Adapting mixture composition to farmer’s need may encourage their adoption. Thus, the research project has a double goals (i) to provide intercropping flower strips for promoting the attraction of beneficial insects against pests and for promoting pollinators diversity; and (ii) to suggests diversification of farm income by planting monospecific oilseed flower strips. [less ▲]

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See detailConsommer « local »: un choix environnemental ?
Ozer, Pierre ULiege

Conference given outside the academic context (2017)

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See detailCirculating Extracellular Vesicles From Mouse and Rat Models of Diabetes Reveal Specific Microrna Signatures as Biomarkers of Diabetic Cardiomyopathy
Chandy, Mark; Njock, Makon-Sébastien ULiege; Veitch, Shawn et al

Poster (2017, November 14)

Background: Type-2 diabetes (T2D) is associated with both reduced and preserved ejection fraction heart failure. Obese db/db mice and Goto Kakizaki (GK) rats represents animals models of T2D that develop ... [more ▼]

Background: Type-2 diabetes (T2D) is associated with both reduced and preserved ejection fraction heart failure. Obese db/db mice and Goto Kakizaki (GK) rats represents animals models of T2D that develop cardiac dysfunction similar to human diabetic cardiomyopathy, in which dominant early findings are of diastolic (and not systolic) dysfunction. Circulating extracellular vesicles (EV) contain microRNAs (miR) that can be transferred to recipient cells to modulate their function. We explored whether analysis of EV content from animals models of T2D would inform on the pathophysiology, diagnosis and therapeutic targets of cardiac dysfunction. Hypothesis: EV from animal models of T2D will have altered miR content that contributes to the pathophysiology of diabetic cardiomyopathy. Methods & Results: miR qPCR arrays on circulating EV isolated from plasma of db/db mice reveal several miR (-7, -15, -25, -30e, -148a, -150, -195) modulated during disease progression. These changes in miR content occur prior to echocardiographic evidence of diastolic dysfunction, including global longitudinal strain and strain rate. Among circulating EV miR from the GK rat model, miR-30 was also upregulated (1.42 fold, p=0.03) compared to Wistar rat. In GK rat left ventricle, and in H9C2 rat cardiac myoblast cultured in 25 mM high glucose media, mass spectrometry revealed proteins that were overexpressed in the diabetic heart including oxidative phosphorylation, glycolysis, fatty acid degredation and the citrate cycle. Using a bioinformatics approach, we next identified metabolic pathways affected by miR-30. Based on these findings, in vivo therapy with antagomiR and mimics of miR-30 are underway to test causality and reversibility of the observed cardiomyopathy. Conclusion: EV from animal models of T2D have altered miR content, including miR-30. We also identify alterations in the expression of a network of metabolism genes in the heart, which are implicated in diabetic cardiomyopathy. If causality is supported by experiments that enhance or block miR-30 expression in these models of disease, we will have identified a novel biomarker and therapeutic target for diabetic cardiomyopathy. [less ▲]

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See detailEtude de la transmission du gammaherpèsvirus murin 4: importance de la glycoprotéine gp150 et développement de stratégies antivirales basées sur l'utilisation du cidofovir
Zeippen, Caroline ULiege

Doctoral thesis (2017)

Gammaherpèsviruses are important pathogens in human medicine. Indeed, Epstein Barr virus and Kaposi Sarcoma associated herpesvirus are responsible for numerous lymphoproliferative diseases and cancers ... [more ▼]

Gammaherpèsviruses are important pathogens in human medicine. Indeed, Epstein Barr virus and Kaposi Sarcoma associated herpesvirus are responsible for numerous lymphoproliferative diseases and cancers. Murid Herpesvirus-4 (MuHV-4) is usually used as a model for human gammaherpèsviruses. Until now, the major limitation of this model was the absence of transmission in laboratory animals. Recently, a sexual transmission of MuHV-4 has been described in laboratory mice. This observation allows, on the one hand, to study mechanisms underlying natural transmission, such as cellular trospism, importance of viral proteins, or immunity response during this part of the cycle. On the other hand, this transmission model allows to test efficiency of measures to reduce transmission. Indeed, herpesvirus are archetype of persistant viruses as infection persists lifelong once established. Studying mechanisms underlying transmission and how to use these mechanisms to reduce it efficiently is therefore of primordial importance. In a first study, we focussed on the biological relevance of mechanisms described previously in vitro. Indeed, a MuHV-4 glycoprotein, gp150, has been shown to participate to the release of infectious particles from cells and to evasion of humoral immunity, two functions that could be important for the virus during transmission. Our results showed that gp150 is essential for an efficient sexual transmission of the MuHV-4. Indeed, gp150 promotes the release of infectious particles from infected vaginal epithelial cells. These results has been published in Journal of Virology in July 2017. In a second study, the same model was used to test efficiency of an antiviral molecule to reduce sexual transmission of the MuHV-4. A nucleotide analogue, the cidofovir, was administrated to mice according to different protocols. A daily administration of cidofovir reduced drastically genital shedding, but also prevent completely infection of naive mice after sexual contact. Finally, a single injection of cidofovir, administered 24 hours after sexual contact, reduced significantly transmission. Altogether, in this work, we used a transmission model of a gammaherpèsvirus in two differents studies: the first foccused on glycoprotein implicated during the transmission and established the importance of a single viral glycoprotein for an efficient transmission. The second study highlighted the efficiency of antiviral drugs to prevent infection by gammaherpesviruses. [less ▲]

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See detailThe Physiology of The Thymus
Geenen, Vincent ULiege

Scientific conference (2017, November 13)

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See detailL’expérience des amours infidèles : une forme d’engagement ?
Guillaume, Jean-François ULiege

in SociologieS (2017)

La fin du désir sexuel pour son conjoint, ou son émoussement, expliqueraient, motiveraient ou justifieraient l’infidélité conjugale. La fidélité durerait le temps de l’amour, le temps des émois (inter ... [more ▼]

La fin du désir sexuel pour son conjoint, ou son émoussement, expliqueraient, motiveraient ou justifieraient l’infidélité conjugale. La fidélité durerait le temps de l’amour, le temps des émois (inter)individuels. À la lecture du Grand résumé que Marie-Carmen nous propose, il semble bien que les choses ne sont pas aussi simples que cela. L’abondance des déclinaisons thématiques des amours infidèles et le foisonnement des concepts mobilisés ne peuvent laisser indifférent : il y est question de socialisation, d’identités, d’expérience, de parcours, d’engagement, de marché sexuel ou amoureux, de genre, de secret, de morale, d’éthique, de domination, de violence symbolique, de ressources, etc. [less ▲]

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See detailLe risque dans l’investissement de l’espace extérieur. Une construction culturelle et sociale ?
Razy, Elodie ULiege

Conference given outside the academic context (2017)

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See detailL'économie collaborative
Gautier, Axel ULiege

Conference given outside the academic context (2017)

Detailed reference viewed: 17 (1 ULiège)
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See detailPathologie thyroidienne chez le sujet âgé
VALDES SOCIN, Hernan Gonzalo ULiege

Scientific conference (2017, November 13)

Detailed reference viewed: 19 (1 ULiège)
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See detailElastic scattering, total cross sections and 𝝆 parameters at the LHC
Cudell, Jean-René ULiege

Speech/Talk (2017)

Detailed reference viewed: 25 (11 ULiège)
See detailPHILOSTORY Autour du spectacle de Louise Vanneste : « Therians »
Hagelstein, Maud ULiege; Pfeiffer, Natacha; Michaud, Philippe-Alain et al

Conference given outside the academic context (2017)

On entend souvent dire que la danse n’a rien à voir avec les images, qu’elle ne produit pas de symboles, et qu’elle échappe au régime de la représentation. On sait ce qui justifie cette idée : la danse ... [more ▼]

On entend souvent dire que la danse n’a rien à voir avec les images, qu’elle ne produit pas de symboles, et qu’elle échappe au régime de la représentation. On sait ce qui justifie cette idée : la danse serait la présentation même du mouvement, de sa puissance intrinsèque, autrement dit le mouvement exécuté plutôt que représenté. Or, quand bien même on s’accorderait sur l’idée que la danse n’illustre rien, cela ne veut pas dire pour autant qu’elle ne créée pas d’alliances avec le monde des images. La rencontre autour de « Therians » offrira l’occasion de rendre visibles les ressources très stimulantes offertes par la théorie de l’image pour un savoir du mouvement. Dialoguant ici avec deux spécialistes du cinéma, Louise Vanneste pourra déplier les dispositifs visuels expérimentés dans son travail (montage, contrastes/contacts, cadre, métamorphoses, hybridité, etc.). [less ▲]

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See detailMeet the needs of elderly at primary care : Experience from Belgium
Van Hees, Thierry ULiege

Scientific conference (2017, November 13)

Detailed reference viewed: 33 (0 ULiège)
See detailTowards a development of iron phosphate-based materials as positive and negative electrodes for Li-ion batteries
Karegeya, Claude ULiege

Doctoral thesis (2017)

The design, synthesis and electrochemical characterization of new electrode materials hold the key for fundamental advances in energy conversion and storage technologies. Polyanionic compounds have been ... [more ▼]

The design, synthesis and electrochemical characterization of new electrode materials hold the key for fundamental advances in energy conversion and storage technologies. Polyanionic compounds have been heavily investigated as possible electrode materials in lithium- and sodium-ion cells. This thesis focused on the design, synthesis, size and morphology tailoring of iron phosphate based electrode materials in order to enhance their electrochemical properties. Four iron phosphate-based electrode materials classified in three groups: Na2Mn1.5Fe1.5(PO4)3, NaxMxFe(3-X)(PO4)3 (X=1.25 when M=Ni and x=1.5 for M= Mn) and Fe1.19(PO4)(OH)0.57(H2O)0.43, were investigated in this work. All these compounds were obtained through wet chemical (hydrothermal or solvothermal) synthesis routes. The preparation protocols and characterization techniques to study the structural, particle size, morphological and electrochemical properties of the above materials have been discussed in the following chapters. Sodium manganese iron phosphate alluaudite structure is one of the studied compounds group. Na2Mn1.5Fe1.5(PO4)3 is obtained via one step hydrothermal synthesis reaction and it was electrochemically studied without any other further heat treatment. NaxMxFe(3-X)(PO4)3 (X=1.25 for M=Ni and x=1.5 for M= Mn) compounds were obtained through solvothermal method in ethylene glycol. Na1.25Ni1.25Fe1.75(PO4)3 is a new material. Both materials have been electrochemically characterized for the first time in this work. Fe1.19(PO4)(OH)0.57(H2O)0.43 was obtained by modifying conventional hydrothermal synthesis of this materials by the addition of conducting carbon (carbon black and carbon nanotubes) in the precursors solution during synthesis that enhance its electrochemical properties as described in this thesis. The Li-ion intercalation reaction mechanisms in Fe1.19(PO4)(OH)0.57(H2O)0.43 cathode material were also investigated by using operando XRD and Mössbauer spectroscopy techniques. The above studies of iron phosphate-based polyanionics as electrode materials in alkali metal-ion batteries show that this group may be the right key in replacing current commercial unsafe electrode materials. The possibility of improving alternative soft chemical synthesis methods to design new materials or improving electrochemical performance of existing electrode materials was also explored here. The roadmap for our current and future work has been proposed, the materials of our future interest have been chosen basing on their promising rich crystal structure and electrochemical properties by comparing them with the studied materials. [less ▲]

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See detailDevelopment of new catalysts for proton exchange membrane fuel cells (PEMFCs)
Zubiaur, Anthony ULiege

Doctoral thesis (2017)

Detailed reference viewed: 25 (14 ULiège)