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See detailIsotopic Ratios in a Peculiar Outbursting Comet
Yang, Bin; Hutsemekers, Damien ULiege; Shinnaka, Yoshiharu et al

in Bulletin of the American Astronomical Society (2017, October 01), 49

Isotopic ratios in comets provide keys for the understanding of the origin of cometary material, and the physical and chemical conditions in the early Solar Nebula. A newly discovered peculiar comet, C ... [more ▼]

Isotopic ratios in comets provide keys for the understanding of the origin of cometary material, and the physical and chemical conditions in the early Solar Nebula. A newly discovered peculiar comet, C/2015 ER61, underwent an outburst with a total brightness increase of 2 magnitudes on the night of April 4th, 2017. The sharp increase in brightness offers a rare opportunity to measure the isotopic ratios of the light elements of this comet. We obtained two high-resolution spectra of C/2015 ER61 with UVES on Apr. 13 and Apr. 17 respectively. At the time of our observations, the comet was fading gradually since the outburst. We measured the 12C/13C and 14N/15N isotopic ratios from the CN Violet (0,0) band. In addition, we determined the 14N/15N ratio in NH2 for C/2015 ER61 from four pairs of NH2 isotopologue lines. Some 18OH lines were detected but the S/N of these lines is too low to derive a reliable 18O/16O estimate. We will present our UVES spectra of C/2015 ER61, obtained shortly after the outburst. We will also present the comparison of the Isotopic ratios of C/2015 ER61 with those of other comets. [less ▲]

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See detailRAPPORT SUR L’ÉGALITÉ ENTRE LES FEMMES ET LES HOMMES À L’UNIVERSITÉ DE LIÈGE 2017 - rapport genre 2017
Cornet, Annie ULiege

E-print/Working paper (2017)

this report present the statistical data of University de Liège (student and personal) for the year 2016-2017. Similar report in 2016 and 2014.

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See detailA model-based approach to characterize individual inbreeding at both global and local genomic scales.
Druet, Tom ULiege; Gautier, M.

in Molecular Ecology (2017), 26

Inbreeding results from the mating of related individuals and may be associated with reduced fitness because it brings together deleterious variants in one individual. In general, inbreeding is estimated ... [more ▼]

Inbreeding results from the mating of related individuals and may be associated with reduced fitness because it brings together deleterious variants in one individual. In general, inbreeding is estimated with respect to an arbitrary base population consisting of ancestors that are assumed unrelated. We herein propose a model-based approach to estimate and characterize individual inbreeding at both global and local genomic scales by assuming the individual genome is a mosaic of homozygous-by-descent (HBD) and non-HBD segments. The HBD segments may originate from ancestors tracing back to different periods in the past defining distinct age-related classes. The lengths of the HBD segments are exponentially distributed with class-specific parameters reflecting that inbreeding of older origin generates on average shorter stretches of observed homozygous markers. The model is implemented in a hidden Markov model framework that uses marker allele frequencies, genetic distances, genotyping error rates and the sequences of observed genotypes. Note that genotyping errors, low-fold sequencing or genotype-by-sequencing data are easily accommodated under this framework. Based on simulations under the inference model, we show that the genomewide inbreeding coefficients and the parameters of the model are accurately estimated. In addition, when several inbreeding classes are simulated, the model captures them if their ages are sufficiently different. Complementary analyses, either on data sets simulated under more realistic models or on human, dog and sheep real data, illustrate the range of applications of the approach and how it can reveal recent demographic histories among populations (e.g., very recent bottlenecks or founder effects). The method also allows to clearly identify individuals resulting from extreme consanguineous matings. [less ▲]

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See detailAssesment of antioxidant potential of phenolic compounds fractions of Algerian Ceratonia siliqua L. pods during ripening stages
Ydjedd, Siham; Chaala, Makhlouf; Richard, Gaetan ULiege et al

in International Food Research Journal [=IFRJ] (2017), 24(5), 2041-2049

The consecutive extraction via different solvents of increasing/decreasing polarity, which allowed a pre-fractionation of the extracted compounds, is widely used as major method for extraction of ... [more ▼]

The consecutive extraction via different solvents of increasing/decreasing polarity, which allowed a pre-fractionation of the extracted compounds, is widely used as major method for extraction of polyphenols. Thus, the phenolic compounds of Ceratonia siliqua L., at unripe and ripe stages, were extracted by four solvents of increasing polarity (hexane, chloroform, ethyl acetate, and acetone/water (70:30, v/v), consecutively. The extracts were evaluated for their total phenolic and flavonoid contents, while the antioxidant capacity was assessed in vitro using DPPH radical and hydrogen peroxide (H2O2) scavenging assays. The phenolic profile has been carried out by HPLC-MS/MS. The results showed that the phenolic contents and antioxidant capacity varied with the nature of extracts and the ripening stage. The 70% aqueous acetone and the ethyl acetate extracts contained the highest phenolic and flavonoid contents, and subsequently showed a pronounced scavenging activity on DPPH and hydrogen peroxide at unripe and ripe stages. The HPLC-MS/MS allowed the identification of five free phenolic acids (gallic, syringic, cinnamic, p-coumaric and ellagic acid for the first time) and five flavonoids (apigenin, naringenin, kaempferol, quercetin rhamnoside and myricetin rhamnoside) at both ripening stages. [less ▲]

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See detailHera
Pirenne-Delforge, Vinciane ULiege; Pironti, Gabriella

in Oxford Classical Dictionary (2017)

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See detailQuestions choisies de droit des sociétés (2012-2017)
Caprasse, Olivier ULiege; Aydogdu, Roman ULiege; Léonard, Laura ULiege

in Chroniques notariales (2017)

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See detailRevue de la littérature sur les effets de la compression externe dynamique péristaltique type Normatec sur la récupération sportive
Kabore, Christophe; Kaux, Jean-François ULiege

in Science & Sports (2017), 32(5), 266-277

Aims. — Recently, several studies have emerged to evaluate the effects on sports recovery of theperistaltic dynamic pneumatic external compression device developed at Newton Center, MA,USA and marketed as ... [more ▼]

Aims. — Recently, several studies have emerged to evaluate the effects on sports recovery of theperistaltic dynamic pneumatic external compression device developed at Newton Center, MA,USA and marketed as the Normatec Pulse Recovery System, with an increased use recently inthe professional and recreational sports communities. Our objective in this review is to evaluatethe effects of Normatec on performance and sports recovery by reviewing the studies publishedto date.News. — We carried out a literature search from 1st July 2016 to 31st October 2016 on theMedline database via PubMed, Scopus and the Cochrane Central Register of Controlled Trials viaOvid, at the end of which we retained for this review the comparative studies between Normatecand placebo, between Normatec and another sports recovery techniques as well as experimentalcontrolled trials, with no restriction on sex and level of training of the participants. All studieswere conducted on healthy subjects aged 18 to 40 years. There were 67 men and 61 women fora total of 128 participants. The selected studies were heterogeneous concerning the modalitiesof exercise before treatment by Normatec, as well as the duration of treatment by Normatec.No adverse effects have been described in the studies included in this review, but without anyspecific control described regarding the potential adverse effects.Conclusion. — Current investigations concerning the sport recovery method using the Normatecdevice have shown a favorable influence on blood lactate clearance, peripheral vascular reac-tivity, post-exercise muscle pain and motion amplitude. However, it does not bring significantgain interest compared to other methods of sport recovery that are cheaper, easier to accessand currently better studied, which must be known by athletes of all levels. However, theseinvestigations provide some insights into the mechanisms underlying the positive effects of thismode of treatment and pave the way for further studies that will contribute to the scientificvalidation of the method of sports recovery by Normatec. [less ▲]

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See detailTravail et subjectivité : la conservation de l’ours brun pour métier.
Denayer, Dorothée ULiege; Collard, Damien

in Travailler : Revue Internationale de Psychopathologie et de Psychodynamique du Travail (2017)

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See detailSurveillance de l'atmosphère terrestre depuis la station du Jungfraujoch : une épopée liégeoise entamée voici plus de 65 ans !
Mahieu, Emmanuel ULiege; Bader, Whitney ULiege; Bovy, Benoît ULiege et al

in Bulletin de la Société Géographique de Liège (2017), 68

It’s in the early 1950s that researchers from the University of Liège started to investigate the Earth’s atmosphere from the Jungfraujoch scientific station, in the Swiss Alps, at a time when concerns ... [more ▼]

It’s in the early 1950s that researchers from the University of Liège started to investigate the Earth’s atmosphere from the Jungfraujoch scientific station, in the Swiss Alps, at a time when concerns related to atmospheric composition changes were nonexistent. Since then, an infrared observational data base unique worldwide has been carefully collected. The exploitation of these observations has allowed constituting multi-decadal time series crucial for the characterization of the changes that affected our atmosphere and for the identification of their causes. In this paper, we first remind about the successive steps which led to establishing the observational program of the Liège team at the Jungfraujoch and we evoke important findings which justified its continuation. Then we present some recent results relevant to the Montreal and Kyoto Protocols, or related to the monitoring of air quality. [less ▲]

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See detailUnderwater world: the end of the myth
Parmentier, Eric ULiege

Conference (2017, October)

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See detailRecent Evolutions and Trends in the Use of Computer Aided Chemical Engineering for Educational Purposes at the University of Liège
Léonard, Grégoire ULiege; Belboom, Sandra ULiege; Toye, Dominique ULiege et al

in Computer Aided Chemical Engineering (2017)

The present paper addresses the evolution and perspectives in the teaching of CAPE methods in the Department of Chemical Engineering at the University of Liège. The transition that happened in the 90ies ... [more ▼]

The present paper addresses the evolution and perspectives in the teaching of CAPE methods in the Department of Chemical Engineering at the University of Liège. The transition that happened in the 90ies with the arrival of commercial software is highlighted, as the learning outcomes evolved from the ability of building programs to solve chemical engineering problems towards the ability to use complex commercial software and to understand their limitations. Moreover, CAPE methods were extended to non-dedicated CAPE courses, which is illustrated here by the goals and challenges of their use in courses like “Reactor Engineering” and “Life Cycle Analysis”. It was observed that students sometimes assume that CAPE softwares provide straightforward and trustworthy solutions without the need of understanding their mathematical bases and assumptions. Thus, solutions to make students aware of these limitations are proposed, including the creation of an integrated project focussing on complex multi-disciplinary issues, evidencing the need for critical input from the operator. [less ▲]

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See detailHighlights from the Organic and Biological Analytical Chemistry Group (OBiAChem)
Focant, Jean-François ULiege

Scientific conference (2017, October)

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See detailSoil Microbial Properties and Nutrients Content Under Exotic and Native Tree Species in Southern Rwanda
Rwibasira, Peter; Naramabuye, François Xavier; Nsabimana, Donat et al

Conference (2017, October)

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See detailThe role of soil microbial diversity and activity in ecosystem functioning
Carnol, Monique ULiege

Conference (2017, October)

Soil microorganisms and soil organic matter availability regulate soil quality and fertility. Through their activity in biogeochemical cycling processes, soil microorganisms decompose soil organic matter ... [more ▼]

Soil microorganisms and soil organic matter availability regulate soil quality and fertility. Through their activity in biogeochemical cycling processes, soil microorganisms decompose soil organic matter and thus regulate nutrient availability and primary production. Landuse changes, such as a shift from forest to agricultural land, as well as a change in tree species composition, can modify microbial diversity and activity and consequently ecosystem funcitoning. Some parameters can be used as biological indicators, relating land use management to soil functioning and ecosystem services. New molecular tools allow now an in-depth investigation of the role of soil microbial diversity in ecosystem functioning. I will adress biogeochemical cycling processes and their relation to ecosystem functioning, with particular emphasis on forest ecosystems. Examples will be drawn from recent research projects investigating the links between tree species, tree species diversity, and soil microbial biomass, diversity and activity in temperate and tropical forests. [less ▲]

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See detailPrise en charge des tendinopathies en pratique générale
Sauvant, Céline; Kaux, Jean-François ULiege

in La Revue de la Médecine Générale (2017), 346

Tendinopathies can develop in several stages. Different therapeutic means are at our disposal. The continuum model, proposed by Cook and Purdam, provides an understanding of pathophysiology and adapts the ... [more ▼]

Tendinopathies can develop in several stages. Different therapeutic means are at our disposal. The continuum model, proposed by Cook and Purdam, provides an understanding of pathophysiology and adapts the therapeutic strategy to achieve optimal recovery and limitation of recurrences. [less ▲]

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See detailFish habitat selection in a large hydropeaking river: Strong individual and temporal variations revealed by telemetry
Capra, Hervé; Plichard, Laura; Bergé, Julien et al

in Science of the Total Environment (2017), 578

Modeling individual fish habitat selection in highly variable environments such as hydropeaking rivers is required for guiding efficient management decisions. We analyzed fish microhabitat selection in ... [more ▼]

Modeling individual fish habitat selection in highly variable environments such as hydropeaking rivers is required for guiding efficient management decisions. We analyzed fish microhabitat selection in the heterogeneous hydraulic and thermal conditions (modeled in two-dimensions) of a reach of the large hydropeaking Rhône River locally warmed by the cooling system of a nuclear power plant. We used modern fixed acoustic telemetry techniques to survey 18 fish individuals (five barbels, six catfishes, seven chubs) signaling their position every 3 s over a three-month period. Fish habitat selection depended on combinations of current microhabitat hydraulics (e.g. velocity, depth), past microhabitat hydraulics (e.g. dewatering risk or maximum velocities during the past 15 days) and to a lesser extent substrate and temperature. Mixed-effects habitat selection models indicated that individual effects were often stronger than specific effects. In the Rhône, fish individuals appear to memorize spatial and temporal environmental changes and to adopt a “least constraining” habitat selection. Avoiding fast-flowing midstream habitats, fish generally live along the banks in areas where the dewatering risk is high. When discharge decreases, however, they select higher velocities but avoid both dewatering areas and very fast-flowing midstream habitats. Although consistent with the available knowledge on static fish habitat selection, our quantitative results demonstrate temporal variations in habitat selection, depending on individual behavior and environmental history. Their generality could be further tested using comparative experiments in different environmental configurations. [less ▲]

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See detailThe influence of environmental factors on the upstream movements of rheophilic cyprinids according to their position in a river basin
Benitez, Jean-Philippe ULiege; Ovidio, Michaël ULiege

in Ecology of Freshwater Fish (2017)

Throughout their lives, fish accomplish frequent movements between functional habitats that are often triggered by environmental signals. We aimed to determine if rheophilic cyprinids (barbel, Barbus ... [more ▼]

Throughout their lives, fish accomplish frequent movements between functional habitats that are often triggered by environmental signals. We aimed to determine if rheophilic cyprinids (barbel, Barbus barbus and chub Squalius cephalus), living in different places of the same river basin, may develop similar movement periodicities and react identically to environmental cues to carry out their spawning migration. We used the capture data of three modern fish passes that were monitored continuously during three consecutive years (2010 to 2012) in three rivers of the Meuse basin in Belgium. We captured 418 individuals at adult stage, and the capture number per species was greater (80%) in spring (during the spawning migration period). The spawning migration of the barbel occurred earlier (median = 122nd day of the year) and at lower temperatures (median = 14.5°C) in the lowland rivers compared to the upland river (140th day of the year and 18.4°C). For the barbel, migration initiation differed depending on the river but finished under similar environmental conditions. In contrast, for the chub, no significant difference between rivers was observed regarding spawning migration periodicity and environmental cues. Within the same river basin, rheophilic cyprinids demonstrate flexibility in their responses to environmental variables and may optimise the start date of migration to spawning grounds depending on their local environment and individual experiences. This phenomenon was more pronounced in the barbel, which has more specific ecological requirements. [less ▲]

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See detailA Simulator to Explore Tarification Designs for Distribution Networks
Manuel de Villena Millan, Miguel ULiege; Gautier, Axel ULiege; Fonteneau, Raphaël ULiege et al

E-print/Working paper (2017)

This paper introduces a computational tool to help assess the impact of regulation policies within distribution net- works in the deployment of distributed renewable electricity generation. This tool is a ... [more ▼]

This paper introduces a computational tool to help assess the impact of regulation policies within distribution net- works in the deployment of distributed renewable electricity generation. This tool is a comprehensive multi-agent simulator capable of handling the interaction between the users of a distribution network and their distribution system operator. With this simulator, it is possible to address the different regulatory constraints encountered by distribution system operators, for any regulation policy. In the simulator, we model individual electricity consumers as rational agents, who may invest in optimised distributed renewable energy installations, if they are cost-efficient compared to the network tariff. By modelling the cost recovery scheme of the distribution system operator, the simulator then computes the evolution of the network tariff in response to a change in the consumption and generation of the consumers in the distribution network, due to the deployment of distributed generation. The simulator is illustrated with various regulation policies. [less ▲]

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See detailNew low electron flux facility in the 0 to 3.5 MeV range for the study of induced signal in JUICE instruments: UVS and MAJIS measurements
Carapelle, Alain ULiege; Grodent, Denis ULiege; Langevin, Yves et al

Poster (2017, October)

We designed and built a new test facility to investigate signal induced by electrons in the 0-3.5 MeV in the JUICE UVS and MAJIS instruments. The facility uses radioisotopes sources to produce low flux of ... [more ▼]

We designed and built a new test facility to investigate signal induced by electrons in the 0-3.5 MeV in the JUICE UVS and MAJIS instruments. The facility uses radioisotopes sources to produce low flux of electrons (< 6000 electrons/cm².s). We present the facility, its capabilities and the results of measurements on UVS and MAJIS. [less ▲]

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