Conclusions: The inferred radial distribution of the plasma temperatures agrees rather well with theoretical expectations. The mass-loss rate and CNO abundances corresponding to our best-fit model also agree quite well with the results of recent studies of ζ Pup in the UV and optical domain. Based on observations collected with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). [less ▲]Detailed reference viewed: 11 (1 ULg) WASP-80b: a gas giant transiting a cool dwarfTriaud, A. H. M. J.; Anderson, D. R.; Collier Cameron, A. et alin Astronomy and Astrophysics (2013), 551We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1 ... [more ▼]We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1; BPM 80815; V = 11.9, K = 8.4). Our analysis shows this is a 0.55 ± 0.04 M[SUB]jup[/SUB], 0.95 ± 0.03 R[SUB]jup[/SUB] gas giant on a circular 3.07 day orbit around a star with a spectral type between K7V and M0V. This system produces one of the largest transit depths so far reported, making it a worthwhile target for transmission spectroscopy. We find a large discrepancy between the vsini[SUB]⋆[/SUB] inferred from stellar line broadening and the observed amplitude of the Rossiter-McLaughlin effect. This can be understood either by an orbital plane nearly perpendicular to the stellar spin or by an additional, unaccounted for source of broadening. Using WASP-South photometric observations, from Sutherland (South Africa), confirmed with the 60 cm TRAPPIST robotic telescope, EulerCam, and the CORALIE spectrograph on the Swiss 1.2 m Euler Telescope, and HARPS on the ESO 3.6 m (Prog ID 089.C-0151), all three located at La Silla Observatory, Chile.Radial velocity and photometric data are available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/551/A80 [less ▲]Detailed reference viewed: 9 (1 ULg) Effects of the Coriolis force on high-order g modes in γ Doradus starsBouabid, M.-P.; Dupret, Marc-Antoine ; Salmon, Sébastien et alin Monthly Notices of the Royal Astronomical Society (2013), 429(3), 2500γ Doradus stars pulsate with high-order gravity modes having typical frequencies which can be comparable to or higher than their rotation frequencies. Therefore, rotation has a non-negligible effect on ... [more ▼]γ Doradus stars pulsate with high-order gravity modes having typical frequencies which can be comparable to or higher than their rotation frequencies. Therefore, rotation has a non-negligible effect on their oscillation properties. To explore the rotation-pulsation coupling in γ Dor stars, we perform a non-adiabatic study including the traditional approximation of rotation on a grid of spherical stellar models covering the mass range 1.4 < M[SUB]*[/SUB] < 2.1 M[SUB]&sun;[/SUB]. This approximation allows us to treat the effect of the Coriolis force on the frequencies and the stability of high-order g modes. The effect of the Coriolis force depends on the kind of mode considered (prograde sectoral or not) and increases with their periods. As a consequence, we first find that the period spacing between modes is no longer periodically oscillating around a constant value. Secondly, we show that the frequency gap (5-15 cycles day[SUP]-1[/SUP]) arising from stable modes between γ Dor-type high-order g modes and δ Scuti-type modes can be easily filled by g-mode frequencies shifted to higher values by the rotation. Thirdly, we analyse the combined effect of diffusive mixing and the Coriolis force on the period spacings. And finally, we predict a slight broadening of the γ Dor instability strip. [less ▲]Detailed reference viewed: 18 (7 ULg) WASP-54b, WASP-56b and WASP-57b: Three new sub-Jupiter mass planets from SuperWASPFaedi, F.; Pollacco, D.; Barros, S. C. C. et alin Astronomy and Astrophysics (2013), 551We present three newly discovered sub-Jupiter mass planets from the SuperWASP survey: WASP-54b is a heavily bloated planet of mass 0.636+0.025-0.024RJ. It orbits a F9 star, evolving off the main sequence ... [more ▼]We present three newly discovered sub-Jupiter mass planets from the SuperWASP survey: WASP-54b is a heavily bloated planet of mass 0.636+0.025-0.024RJ. It orbits a F9 star, evolving off the main sequence, every 3.69 days. Our MCMC fit of the system yields a slightly eccentric orbit (e = 0.067+0.033-0.025) for WASP-54b. We investigated further the veracity of our detection of the eccentric orbit for WASP-54b, and we find that it could be real. However, given the brightness of WASP-54 V = 10.42 mag, we encourage observations of a secondary eclipse to draw robust conclusions on both the orbital eccentricity and the thermal structure of the planet. WASP-56b and WASP-57b have masses of 0.571+0.034-0.035MJ and 0.672+0.049-0.046MJ, respectively; and radii of 1.092+0.035-0.033RJ for WASP-56b and 0.916+0.017-0.014RJ for WASP-57b. They orbit main sequence stars of spectral type G6 every 4.67 and 2.84 days, respectively. WASP-56b and WASP-57b show no radius anomaly and a high density possibly implying a large core of heavy elements; possibly as high as ~50 M⊕ in the case of WASP-57b. However,the composition of the deep interior of exoplanets remains still undetermined. Thus, more exoplanet discoveries such as the ones presented in this paper, are needed to understand and constrain giant planets' physical properties. [less ▲]Detailed reference viewed: 7 (0 ULg) Comets C/2012 F6 (Lemmon) and C/2011 L4 (Panstarrs)Opitom, Cyrielle ; Jehin, Emmanuel ; Manfroid, Jean et alin Central Bureau Electronic Telegrams (2013), 3433CBET 3433 available at Central Bureau for Astronomical Telegrams.Detailed reference viewed: 11 (0 ULg) Health Technology Assessment in Osteoporosis.Hiligsmann, Mickaël ; Kanis, John A.; Compston, Juliet et alin Calcified Tissue International (2013)We review the various aspects of health technology assessment in osteoporosis, including epidemiology and burden of disease, and assessment of the cost-effectiveness of recent advances in the treatment of ... [more ▼]We review the various aspects of health technology assessment in osteoporosis, including epidemiology and burden of disease, and assessment of the cost-effectiveness of recent advances in the treatment of osteoporosis and the prevention of fracture, in the context of the allocation of health-care resources by decision makers in osteoporosis. This article was prepared on the basis of a symposium held by the Belgian Bone Club and the discussions surrounding that meeting and is based on a review and critical appraisal of the literature. Epidemiological studies confirm the immense burden of osteoporotic fractures for patients and society, with lifetime risks of any fracture of the hip, spine, and forearm of around 40 % for women and 13 % for men. The economic impact is also large; for example, Europe's six largest countries spent 31 billion on osteoporotic fractures in 2010. Moreover, the burden is expected to increase in the future with demographic changes and increasing life expectancy. Recent advances in the management of osteoporosis include novel treatments, better fracture-risk assessment notably via fracture risk algorithms, and improved adherence to medication. Economic evaluation can inform decision makers in health care on the cost-effectiveness of the various interventions. Cost-effectiveness analyses suggest that the recent advances in the prevention and treatment of osteoporosis may constitute an efficient basis for the allocation of scarce health-care resources. In summary, health technology assessment is increasingly used in the field of osteoporosis and could be very useful to help decision makers efficiently allocate health-care resources. [less ▲]Detailed reference viewed: 19 (10 ULg) Creation, animation and perennial activities of Communities of Practice supported by ICTDenis, Brigitte in Journal of Communication and Computer (2013), 10(3), 394-308The creation and the management of Community of Practice (CoP) supported by Information and Communication Technologies (ICT) can be an answer to the need of capitalizing and sharing knowledge for many ... [more ▼]The creation and the management of Community of Practice (CoP) supported by Information and Communication Technologies (ICT) can be an answer to the need of capitalizing and sharing knowledge for many private or public institutions. This paper describes the creation process and the development of six CoPs belonging to different fields (learning with ICT, education, and health). It aims at answering to two questions: “Is it possible to create, animate and let a CoP supported by ICT become perennial?” and “Do ICT facilitate CoP’s development?” After presenting the main characteristics of a CoP and existing typologies, we describe the Web services used by the CoPs we followed during research projects. The collect of data was based on different methods: observations (e.g. concerning CoP members’ participation to face-to-face activities and use of ICT services), questionnaires, learners’ logbooks, interviews, users’ productions analysis and shared documents. We examine the evolution of each community referring to their objectives and to the CoP’s life cycle. We underline the obstacles and the facilitating factors to act as a CoP. Finally, we conclude, answering our two questions, and providing some recommendations about the management of CoPs supported by ICT. [less ▲]Detailed reference viewed: 46 (2 ULg) Structural equation models to estimate risk of infection and tolerance to bovine mastitis.Detilleux, Johann ; Theron, Léonard ; Duprez, Jean-Noël et alin Genetics, Selection, Evolution [=GSE] (2013)Detailed reference viewed: 15 (11 ULg) Schmallenberg virus circulation in Belgium in 2012Bayrou, Calixte ; Garigliany, Mutien-Marie ; Cassart, Dominique et alin Veterinary Record : Journal of the British Veterinary Association (2013), 172Field and laboratory observations suggest that Schmallenberg virus was circulating in Belgium during the summer 2012 despite a very high herd immunity. Further studies will be conducted to determine ... [more ▼]Field and laboratory observations suggest that Schmallenberg virus was circulating in Belgium during the summer 2012 despite a very high herd immunity. Further studies will be conducted to determine whether we are observing the last cases of this epizootic or if the above calves announce a transition to endemicity. [less ▲]Detailed reference viewed: 34 (3 ULg) Histoire orale à Matonge (Bruxelles) : un miroir postcolonialDemart, Sarah in Revue Européenne des Migrations Internationales (2013)This paper investigates the framing of memory associated with a urban district. Formerly « elite », the district of Matonge in Brussels developed at the end of the 1960s- beginning of the 1970s, when no ... [more ▼]This paper investigates the framing of memory associated with a urban district. Formerly « elite », the district of Matonge in Brussels developed at the end of the 1960s- beginning of the 1970s, when no Congolese immigration was identified in Belgium. Converting into an "African " or " multicultural" area, Matonge remains the inevitable place for Congolese meetings and festivals where "another" history can be heard. Grounding on a long-time ethnographical approach, we questioned the history of this district whose territorial frames highlight the original interweaving of Congolese geographies in Belgium and Belgian timelines in DRC (Democratic Republic of Congo, former Zaire). Besides, these narratives expand at the margins of classical circuits of history production and reveal a post-colonial face-to-face with strong continuity with the so-called “parallel development” established by the Belgian colonial order in Congo. [less ▲]Detailed reference viewed: 154 (14 ULg) Evaluation de la diversité de l’entomofaune en cultures maraîchères dans l’est de la ChinePolo Lozano, Damien ; Bosquée, Emilie ; Chevalier Mendes Lopes, Thomas et alin Entomologie Faunistique = Faunistic Entomology (2013), 66Within the framework of research aimed at developing biological control in vegetable crops in Shandong province in China, a pest and associated auxiliary entomophagous insects monitoring was conducted to ... [more ▼]Within the framework of research aimed at developing biological control in vegetable crops in Shandong province in China, a pest and associated auxiliary entomophagous insects monitoring was conducted to determine entomological groups of agricultural interest and compare them to the situation in Belgium. The diversity and abundance of the entomofauna were assessed in potato and zucchini fields between May 9th and June 13th, 2011, using yellow traps and in situ observations on host plants. A total of 36 466 and 34 806 insects were trapped or observed on the plants in zucchini and potato fields, respectively. Ten orders and more than sixty families in each crop were identified. Aphids widely predominated in the traps and exerted a strong pressure on both crops early in the season. Other families of pests have been identified but no specific pest of these two crops and the investigated region is among the collections. [less ▲]Detailed reference viewed: 107 (39 ULg) Behaviour of bolted flange joints in tubular structures under monotonic, repeated and fatigue loadings I: Experimental testsHoang, Van Long ; Jaspart, Jean-Pierre ; Demonceau, Jean-François in Journal of Constructional Steel Research (2013), 85This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590 ... [more ▼]This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590) whilst normal steel grade (S355) is used for the flanges. The tests were performed under monotonic loadings to obtain the mechanical properties of the connections and under cyclic loadings to characterise the behaviour of these connections for low cycle and high cycle fatigue. The test results are first presented herein, including a critical analysis of the latter; then, designmethods available in literature are applied for the tested configurations with the objective to investigate the accuracy of these methods through comparisons with the experimental results. [less ▲]Detailed reference viewed: 49 (5 ULg) Evaluation of Heat Stress Effects on Production Traits and Somatic Cell Score of Holsteins in a Temperate EnvironmentHammami, Hedi ; Bormann, Jeanne; M'Hamdi, Naceur et alin Journal of Dairy Science (2013), 96(3), 1844-1855This study was aimed to evaluate the degree of thermal stress exhibited by Holsteins under a continental temperate climate. Milk, fat, protein, and somatic cell count test-day records collected between ... [more ▼]This study was aimed to evaluate the degree of thermal stress exhibited by Holsteins under a continental temperate climate. Milk, fat, protein, and somatic cell count test-day records collected between 2000 and 2011 from 23,963 cows in 604 herds were combined with meteorological data from 14 public weather stations in Luxembourg. Daily values of six different thermal indices (TI) weighted in term of temperature, relative humidity, solar radiation, and wind speed were calculated by averaging hourly TI over 24 hours. Heat stress thresholds were firstly identified by a broken-line regression model. Regression models were thereafter applied to quantify milk production losses due to heat stress. The tipping points at which milk and protein yields declined were effectively identified. For fat yield, no valid threshold was identified for any of the studied TI. Daily fat yields tended to decrease steadily with increasing values of TI. Daily somatic cell scores (SCS) pattern was marked by increased values at both lowest and highest TI ranges with a more pronounced reaction to cold stress for apparent temperature indices. Thresholds differed between TI and traits. For production traits, they ranged from 62 (TI1) to 80 (TI3) for temperature-humidity indices (THI) and from 16 (TI5) to 20 (TI6) for apparent temperature indices. Corresponding SCS thresholds were higher and ranged from 66 (TI1) to 82 (TI3) and from 20 (TI5) to 23 (TI6), respectively. The largest milk decline per unit of mild, moderate, and extreme heat stress levels of 0.164, 0.356, and 0.955 kg, respectively, was observed when using the conventional THI (TI1). The highest yearly milk, fat, and protein losses of 54, 5.7, and 4.2 kg respectively were detected by TI2, the THI index that is adjusted for wind speed and solar radiation. The latter index could be considered as the best indicator of heat stress to be used for forecast and herd management in a first step in temperate regions under anticipated climate changes. [less ▲]Detailed reference viewed: 85 (21 ULg) Héritage colonial et appropriation du pouvoir d’éduquer. Approche socio-historique du champ de l'éducation primaire en RDCAndre, Géraldine ; Poncelet, Marc in Cahiers de la Recherche sur l'Education et les Savoirs (2013), 12Detailed reference viewed: 41 (10 ULg) Numerical simulation of a pyramid steel sheet formed by single point incremental forming using solid-shell finite elementsDuchene, Laurent ; Guzmán Inostroza, Carlos Felipe ; Behera, Amar Kumar et alin Key Engineering Materials [=KEM] (2013)Single Point Incremental Forming (SPIF) is an interesting manufacturing process due to its dieless nature and its increased formability compared to conventional forming processes. Nevertheless, the ... [more ▼]Single Point Incremental Forming (SPIF) is an interesting manufacturing process due to its dieless nature and its increased formability compared to conventional forming processes. Nevertheless, the process suffers from large geometric deviations when compared to the original CAD profile. One particular example arises when analyzing a truncated two-slope pyramid. In this paper, a finite element simulation of this geometry is carried out using a newly implemented solid-shell element, which is based on the Enhanced Assumed Strain (EAS) and the Assumed Natural Strain (ANS) techniques. The model predicts the shape of the pyramid very well, correctly representing the springback and the through thickness shear (TTS). Besides, the effects of the finite element mesh refinement, the EAS and ANS techniques on the numerical prediction are presented. It is shown that the EAS modes included in the model have a significant influence on the accuracy of the results. [less ▲]Detailed reference viewed: 99 (52 ULg) Droit des biensLecocq, Pascale in Revue de Jurisprudence de Liège, Mons et Bruxelles (2013)Detailed reference viewed: 37 (7 ULg) Exploring the origin of magnetic fields in massive stars: II. New magnetic field measurements in cluster and field starsHubrig, S.; Schoeller, M.; Ilyin, I. et alin Astronomy and Astrophysics (2013), 551Theories on the origin of magnetic fields in massive stars remain poorly developed, because the properties of their magnetic field as function of stellar parameters could not yet be investigated. To ... [more ▼]Theories on the origin of magnetic fields in massive stars remain poorly developed, because the properties of their magnetic field as function of stellar parameters could not yet be investigated. To investigate whether magnetic fields in massive stars are ubiquitous or appear only in stars with a specific spectral classification, certain ages, or in a special environment, we acquired 67 new spectropolarimetric observations for 30 massive stars. Among the observed sample, roughly one third of the stars are probable members of clusters at different ages, whereas the remaining stars are field stars not known to belong to any cluster or association. Spectropolarimetric observations were obtained during four different nights using the low-resolution spectropolarimetric mode of FORS2 (FOcal Reducer low dispersion Spectrograph) mounted on the 8-m Antu telescope of the VLT. Furthermore, we present a number of follow-up observations carried out with the high-resolution spectropolarimeters SOFIN mounted at the Nordic Optical Telescope (NOT) and HARPS mounted at the ESO 3.6m between 2008 and 2011. To assess the membership in open clusters and associations, we used astrometric catalogues with the highest quality kinematic and photometric data currently available. The presence of a magnetic field is confirmed in nine stars previously observed with FORS1/2: HD36879, HD47839, CPD-282561, CPD-472963, HD93843, HD148937, HD149757, HD328856, and HD164794. New magnetic field detections at a significance level of at least 3sigma were achieved in five stars: HD92206c, HD93521, HD93632, CPD-468221, and HD157857. Among the stars with a detected magnetic field, five stars belong to open clusters with high membership probability. According to previous kinematic studies, five magnetic O-type stars in our sample are candidate runaway stars. [less ▲]Detailed reference viewed: 4 (2 ULg) Short-term temperature impact on soil heterotrophic respiration in limed agricultural soil samplesBuysse, Pauline ; Goffin, Stéphanie ; Carnol, Monique et alin Biogeochemistry (2013), 112(1-3), 441-455This study sought to investigate the hourly and daily timescale responses of soil CO2 fluxes to temperature in a limed agricultural soil. Observations from different incubation experiments were compared ... [more ▼]This study sought to investigate the hourly and daily timescale responses of soil CO2 fluxes to temperature in a limed agricultural soil. Observations from different incubation experiments were compared with the results of a model combining biotic (heterotrophic respiration) and abiotic (carbonate weathering) components. Several samples were pre-incubated for 8-9 days at three temperatures (5, 15 and 25°C) and then submitted to short-term temperature cycles (where the temperature was increased from 5 to 35°C in 10°C stages, with each stage being 3 h long). During the temperature cycles (hourly timescale), the soil CO2 fluxes increased significantly with temperature under all pre-incubation temperature treatments. A hysteresis effect and negative fluxes during cooling phases were also systematically observed. At a given hourly timescale temperature, there was a negative relationship of the CO2 fluxes with the pre-incubation temperature. Using the combined model allowed the experimental results to be clearly described, including the negative fluxes and the hysteresis effect, showing the potentially large contribution of abiotic fluxes to total fluxes in limed soils, after short-term temperature changes. The fairly good agreement between the measured and simulated flux results also suggested that the biotic flux temperature sensitivity was probably unaffected by timescale (hourly or daily) or pre-incubation temperature. The negative relationship of the CO2 fluxes with the pre-incubation temperature probably derived from very labile soil carbon depletion, as shown in the simulations. This was not, however, confirmed by soil carbon measurements, which leaves open the possibility of adaptation within the microbial community. [less ▲]Detailed reference viewed: 62 (17 ULg) A dual strategy to cope with high light in Chlamydomonas reinhardtiiAllorent, G; Tokutsu, R; Roach, T et alin Plant Cell (2013), 25(2), 545-557Absorption of light in excess of the capacity for photosynthetic electron transport is damaging to photosynthetic organisms. Several mechanisms exist to avoid photodamage, which are collectively referred ... [more ▼]Absorption of light in excess of the capacity for photosynthetic electron transport is damaging to photosynthetic organisms. Several mechanisms exist to avoid photodamage, which are collectively referred to as nonphotochemical quenching. This term comprises at least two major processes. State transitions (qT) represent changes in the relative antenna sizes of photosystems II and I. High energy quenching (qE) is the increased thermal dissipation of light energy triggered by lumen acidification. To investigate the respective roles of qE and qT in photoprotection, a mutant (npq4 stt7-9) was generated in Chlamydomonas reinhardtii by crossing the state transition–deficient mutant (stt7-9) with a strain having a largely reduced qE capacity (npq4). The comparative phenotypic analysis of the wild type, single mutants, and double mutants reveals that both state transitions and qE are induced by high light. Moreover, the double mutant exhibits an increased photosensitivity with respect to the single mutants and the wild type. Therefore, we suggest that besides qE, state transitions also play a photoprotective role during high light acclimation of the cells, most likely by decreasing hydrogen peroxide production. These results are discussed in terms of the relative photoprotective benefit related to thermal dissipation of excess light and/or to the physical displacement of antennas from photosystem II. [less ▲]Detailed reference viewed: 11 (5 ULg) Les fictions en droitBiquet, Christine in Hanyang Law Review (2013), 30(1), 275-305Detailed reference viewed: 4 (1 ULg) Épaisseur d’image : profondeur(s) paradoxale(s). Sur Long Live the New Flesh de Nicolas ProvostThonon, Jonathan in Cinéma & Cie : International Film Studies Journal (2013)Detailed reference viewed: 8 (0 ULg) Compte-rendu de l'ouvrage de A. Beyaert-Geslin: Sémiotique du designDondero, Maria Giulia in Interfaces numériques (2013), Vol 1(4), 133-140Detailed reference viewed: 16 (2 ULg) Neuartige Management Tools für Milchviehbetrieb mittels SpektralanalytikArnould, Valérie ; Reding, Romain; Bormann, Jeanne et alin de lëtzebuerger ziichter (2013), 30In den letzten Jahrzenten wurde die Milch- und Fleischproduktion mehr und mehr mit generellen Nachhaltigkeitsfragen in Verbindung gebracht. Sehr oft wird eine bessere Produktionsnachhaltigkeit auch mit ... [more ▼]In den letzten Jahrzenten wurde die Milch- und Fleischproduktion mehr und mehr mit generellen Nachhaltigkeitsfragen in Verbindung gebracht. Sehr oft wird eine bessere Produktionsnachhaltigkeit auch mit ökonomischen Aspekten verbunden. In der Tat liegt die Kunst der modernen Milchproduktion scheinbar vor allem darin, die Produktion (egal ob tier- oder betriebsindividuell) stetig bei möglichst gleichbleibenden oder gar noch geringeren Kosten zu erhöhen. Daneben ist zu bedenken, dass Konsumenten heutzutage neben preislichen Aspekten sehr oft zusätzlich Gesundheitsaspekte ins Spiel bringen, so dass es für Milchbetriebe nicht unwesentlich ist, die Produktion in gewisser Weise diesen Ansprüchen nach zu gestalten. Glücklicherweise können entscheidende Inhaltsstoffe wie der Milchfettgehalt oder das Fettsäuremuster der Milch durch Managementfaktoren wie Zucht, Selektion, Fütterung und Haltungsbedingungen zum Positiven beeinflusst werden und den Anforderungen der Nachfrageseite besser angepasst werden. Genau bei dieser Problematik liegen die Ansatzpunkte der verschiedenen CONVIS Projekte (QuaM, ManageMILK und OptiMIR) im Bereich Spektralanalysen der Milch. [less ▲]Detailed reference viewed: 32 (10 ULg) Evaluation of viability and growth of Acetobacter senegalensis under different stress conditionsShafiei, Rasoul ; Thonart, Philippe ; Delvigne, Frank et alin International Journal of Food Microbiology (2013)Acetic acid bacteria (AAB) are used in production of vinegars. During acetic acid fermentation, AAB encounter various aggressive conditions which may lead to a variety of cellular disorders. Previous ... [more ▼]Acetic acid bacteria (AAB) are used in production of vinegars. During acetic acid fermentation, AAB encounter various aggressive conditions which may lead to a variety of cellular disorders. Previous researches mainly studied the influences of different carbon sources on tolerance of AAB to ethanol and acetic acid. In this study, different techniques were used comparatively to investigate the effects of preadaptation on the ability of A. senegalensis to tolerate ethanol and acetic acid. In general, the carbon sources used for preadaptation of A. senegalensis exhibited significant effects on the tolerance of cells to stressors. Flow-cytometric assessments of preadapted cells in ethanol showed that 87.3% of the cells perform respiration after exposure to a stress medium containing 5% (v/v) ethanol and 3% (w/v) acetic acid. However, 58.4% of these preadapted cells could keep their envelope integrity under the stress condition. They could also grow rapidly (μmax = 0.39/h) in the stress medium (E5A3) with a high yield (>80%). A. senegalensis grown in glucose exhibited a low tolerance to acetic acid. Analysis of their respiration capacity, membrane integrity and culturability revealed that almost all the population were dead after exposure to 5% (v/v) ethanol and 3% (w/v) acetic acid. In contrast, exposure of A. senegalensis preadapted in a mixture of glucose and acetic acid to a stress medium containing 5% (v/v) ethanol and 3% (w/v) acetic acid, exhibited an intact respiration system and cellular membrane integrity in 80.3% and 50.01% of cells, respectively. Moreover, just 24% of these cells could keep their culturability under that stress condition. [less ▲]Detailed reference viewed: 15 (6 ULg) Impact of bone marrow-derived mesenchymal stromal cells on experimental xenogeneic graft-versus-host diseaseBruck, France; Belle, Ludovic ; LECHANTEUR, Chantal et alin Cytotherapy (2013), 15(3), 267-279Background aims. Graft-versus-host disease (GVHD) is a life-threatening complication of allogeneic hematopoietic cell transplantation caused by donor T cells reacting against host tissues. Previous ... [more ▼]Background aims. Graft-versus-host disease (GVHD) is a life-threatening complication of allogeneic hematopoietic cell transplantation caused by donor T cells reacting against host tissues. Previous studies have suggested that mesenchymal stromal cells (MSCs) could exert potent immunosuppressive effects. Methods. The ability of human bone marrow derived MSCs to prevent xenogeneic GVHD in non-obese diabetic/severe combined immunodeficient (NOD/SCID) mice and in NOD/SCID/interleukin-2Rg(null) (NSG) mice transplanted with human peripheral blood mononuclear cells (PBMCs) was assessed. Results. Injection of 200 106 human PBMCs intraperitoneally (IP) into sub-lethally (3.0 Gy) irradiated NOD/SCID mice also given anti-asialo GM1 antibodies IP 1 day prior and 8 days after transplantation induced lethal xenogeneic GVHD in all tested mice. Co-injection of 2 106 MSCs IP on day 0 did not prevent lethal xenogeneic GVHD induced by injection of human PBMCs. Similarly, injection of 30 106 human PBMCs IP into sub-lethally (2.5 Gy) irradiated NSG mice induced a lethal xenogeneic GVHD in all tested mice. Injection of 3 106 MSCs IP on days 0, 7, 14 and 21 did not prevent lethal xenogeneic GVHD induced by injection of human PBMCs. Conclusions. Injection of MSCs did not prevent xenogeneic GVHD in these two humanized mice models. [less ▲]Detailed reference viewed: 35 (17 ULg) Sleep in the unresponsive wakefulness syndrome and minimally conscious stateCologan, Victor ; Drouot, Xavier; Parapatics, Silvia et alin Journal of Neurotrauma (2013), 30(5), 339-346The goal of our study was to investigate different aspects of sleep, namely the sleep-wake cycle and sleep stages, in the vegetative state/unresponsive wakefulness syndrome (VS/UWS) and minimally ... [more ▼]The goal of our study was to investigate different aspects of sleep, namely the sleep-wake cycle and sleep stages, in the vegetative state/unresponsive wakefulness syndrome (VS/UWS) and minimally conscious state (MCS). 24h polysomnography was performed in 20 patients in a UWS (n=10) or in a MCS (n=10) due to brain injury. The data were first tested for the presence of a sleep-wake cycle and the observed sleep patterns were compared to standard scoring criteria. Sleep spindles, slow waves sleep and rapid eye movement sleep were quantified and their clinical value was investigated. According to our results, an electrophysiological sleep-wake cycle was identified in 5 MCS and 3 VS/UWS patients. Sleep stages did not always match the standard scoring criteria which therefore needed to be adapted. Sleep spindles were more present in patients who clinically improved within 6 months. Slow wave sleep was present in 8 MCS and 3 VS/UWS patients but never in the ischemic etiology. Rapid eye movement sleep, and therefore dreaming which is a form of consciousness, was present in all MCS and 3 VS/UWS patients. In conclusion, the presence of alternating periods of eyes-open/eyes-closed cycles does not necessarily imply preserved electrophysiological sleep architecture in the UWS and MCS, contrary to previous definition. The investigation of sleep is a little studied yet simple and informative way to evaluate the integrity of residual brain function in patients with disorders of consciousness with possible clinical diagnostic and prognostic implications. [less ▲]Detailed reference viewed: 210 (11 ULg) Leptospira spp. prevalence in small mammal populations in Cotonou, BeninHouemenou, Gualbert ; Ahmed, A.; Libois, Roland et alin ISRN Epidemiology (2013)The aim of this study was to assess the Leptospira prevalence in small animals in Cotonou, the capital of Benin. Rodents and shrews were captured in urban and periurban settings and determined as species ... [more ▼]The aim of this study was to assess the Leptospira prevalence in small animals in Cotonou, the capital of Benin. Rodents and shrews were captured in urban and periurban settings and determined as species of the genera Rattus, Mastomys, and Crocidura. Kidney specimens of 90 animals were examined using a real-time PCR assay specific for leptospires that belong to pathogenic species. Leptospiral DNA was amplified from kidney tissues ranging from 13.3% (8/60) in Rattus rattus to 100.0% (1/1) in Crocidura spp. with an average of 18.9% (17/90) of the animals caught at 15 locations. Clade-specific Taqman PCR on 10 samples placed six of these within clade 1 comprising the species L. kirschneri, L. interrogans, L. meyeri, and L. noguchii and four within clade 2 consisting of species L. weilii, L. alexanderi, L. borgpetersenii, and L. santarosai. Phylogenetic analysis of partial sequences of the amplicons of seven samples of these 10 samples revealed that four of the clade 1 samples could equally be assigned to L. interrogans and L. kirschneri and three samples fromclade 2 belonged to L. borgpetersenii. Results presented in the paper indicate that small mammals present a major public health risk for acquiring leptospirosis in Cotonou, Benin and will contribute to a raised awareness amongst health care workers and decision makers and hence promote appropriate clinical management of cases. [less ▲]Detailed reference viewed: 42 (6 ULg) Clinical Utility of an Epigenetic Assay to Detect Occult Prostate Cancer in Histopathologically Negative Biopsies: Results of the MATLOC Study.Stewart, Grant D.; Van Neste, Leander; DELVENNE, Philippe et alin Journal of Urology (The) (2013), 189(3), 1110-1116PURPOSE: Concern over possible false negative histopathology of prostate biopsies often leads to re-biopsy. A quantitative methylation-specific PCR (QMSP) assay panel, including GSTP1,APC and RASSF1 ... [more ▼]PURPOSE: Concern over possible false negative histopathology of prostate biopsies often leads to re-biopsy. A quantitative methylation-specific PCR (QMSP) assay panel, including GSTP1,APC and RASSF1, could serve to increase the sensitivity to detect cancer over pathologic review alone, leading towards a high negative predictive value (NPV) and a decrease of unnecessary repeat biopsies. MATERIALS AND METHODS: The MATLOC (Methylation Analysis To Locate Occult Cancer) study blindly tested archived prostate biopsy needle core tissue samples of 498 subjects from the UK and Belgium with histopathologically negative prostate biopsies followed by either a positive (cases) or negative (controls) repeat biopsy within 30 months. The clinical performance of the epigenetic marker panel, emphasizing NPV, was assessed and cross-validated. Multivariate logistic regression was used to evaluate all risk factors. RESULTS: The epigenetic assay performed on the first, negative biopsies from this retrospective review cohort resulted in an NPV of 90% (95% CI, 87-93%). In a multivariate model, correcting for age, PSA, DRE and histopathological characteristics of the first biopsy, the epigenetic assay proved to be a significant, independent predictor of patient outcome with an odds ratio of 3.17 (95% CI, 1.81-5.53). CONCLUSIONS: A multiplex QMSP assay determining the methylation status of GSTP1,APC and RASSF1is strongly associated with the outcome of a repeat biopsy up to 30 months after an initial negative biopsy in men with suspicion of prostate cancer. The addition of this epigenetic assay could improve the prostate cancer diagnostic process and reduce unnecessary repeat biopsies. [less ▲]Detailed reference viewed: 18 (9 ULg) Enhanced ALE Data Transfer Strategy for Explicit and Implicit Thermomechanical Simulations of High-Speed ProcessesBoman, Romain ; Ponthot, Jean-Philippe in International Journal of Impact Engineering (2013), 53The Arbitrary Lagrangian Eulerian (ALE) formalism, which allows the computational grid to move regardless of thematerial deformation, is a convenient way to avoid distortedmeshes in finite element ... [more ▼]The Arbitrary Lagrangian Eulerian (ALE) formalism, which allows the computational grid to move regardless of thematerial deformation, is a convenient way to avoid distortedmeshes in finite element simulations. One crucial step of the ALE algorithm is the data transfer between the Lagrangian and the Eulerian meshes. In this paper, an enhanced transfer method is presented. It can handle complex finite elements which are integrated with more than one Gauss point. This method can thus be used either with an explicit or with an implicit time integration scheme. Choosing the adequate order of accuracy and the most appropriate number of physical fields to be transferred is always a compromise between the speed and the precision of the model. For example, some variables may be sometimes ignored during the transfer in order to decrease the CPU time. Therefore, the most effective way to use such an algorithm is demonstrated in this work by revisiting a classical ALE benchmark, the Taylor impact. An implicit thermomechanical ALE simulation of a high-speed tensile test is also presented and is compared to experimental results from the literature. [less ▲]Detailed reference viewed: 22 (6 ULg) La mosaïque pentecôtisteDemart, Sarah in Politique : Revue de Débats (2013)La transformation du paysage religieux de nos villes est une forme de la multiculturalité en acte. Mais celle-ci ne se réduit pas à l’islam qui mobilise la plupart des controverses. Le renouveau religieux ... [more ▼]La transformation du paysage religieux de nos villes est une forme de la multiculturalité en acte. Mais celle-ci ne se réduit pas à l’islam qui mobilise la plupart des controverses. Le renouveau religieux qui se manifeste à l’intérieur des communautés congolaises mérite également l’intérêt. [less ▲]Detailed reference viewed: 18 (1 ULg) Relationships between the P status of surface and deep horizons of agricultural soils under various cropping systems and for different soil types: a case study in BelgiumRenneson, Malorie ; Dufey, J.; Legrain, Xavier et alin Soil Use and Management (2013), 29(S1), 103--113Application of phosphorus (P) fertilizers to agricultural soils should be based on sound knowledge about soil P reserves, availability and lability to optimize conditions for plant uptake while limiting P ... [more ▼]Application of phosphorus (P) fertilizers to agricultural soils should be based on sound knowledge about soil P reserves, availability and lability to optimize conditions for plant uptake while limiting P transport to surface waters. This study investigated relationships between parent material (PM), land use and P fractions in agricultural soils at a regional scale. Surface and deep (100–120 cm) soil samples were collected from 120 agricultural sites (240 total samples) and analysed for three P forms (inorganic, organic and available) as well as for additional key properties. Land uses within the study area were continuous cropland, permanent pasture and temporary grassland. The area covered the 12 most common parent types in Wallonia. Mean total P contents were 904 and 401 mg/kg in surface and deep samples, respectively, with a 33% coefficient of variation for both horizons. The organic P fraction represented, on average, 30% of total P, while available P corresponded to 9% of total P. The influence of PM was apparent in both the surface and deep soil samples, while land use influenced only surface properties. The pattern in total P content relative to land use was pasture ≥ cropland ≥ temporary grassland. Correlation analyses highlighted significant relationships between edaphic parameters viz Alox, Feox, CEC, TOC, pH and P content, the main soil parameter being Alox which determines P sorption capacity. An enrichment factor was used to distinguish between geogenic sources and human activities in terms of topsoil P content. [less ▲]Detailed reference viewed: 38 (16 ULg) Evaluation of a Model-Based Hemodynamic Monitoring Method in a Porcine Study of Septic ShockRevie, James; Stevenson, David; Chase, J. Geoffrey et alin Computational and Mathematical Methods in Medicine (2013)Detailed reference viewed: 16 (3 ULg) Lateral inhibition in visual cortex of migraine patients between attacksCoppola, Gianluca; Parisi, Vincenzo; Di Lorenzo, Cherubino et alin Journal of Headache & Pain (2013), 14Detailed reference viewed: 15 (0 ULg) Synovite villonodulaire pigmentée du genouSmets, Fanny; KURTH, William ; Crielaard, Jean-Michel et alin Revue Médicale de Liège (2013), 68(3), 104-109This case report is concerned with a 30 year old patient diagnosed with pigmented villonodular synovitis (PVNS) in the knee. The patient underwent an orthopedic surgical operation to remove the lesions ... [more ▼]This case report is concerned with a 30 year old patient diagnosed with pigmented villonodular synovitis (PVNS) in the knee. The patient underwent an orthopedic surgical operation to remove the lesions. PVNS is a rare proliferative disorder, mostly benign and affecting the knee; its aetiology remains unclear. It represents a medical challenge because of non-specific symptoms that delay the diagnosis with a very high rate of recurrence. MRI imaging is necessary to explore the lesions, but the final diagnosis can only be made after anatomopathologic analysis of the excised lesions. When multiple lesions are present, the treatment consists of their excision by arthrotomy, or by arthroscopy if the disease is localized. [less ▲]Detailed reference viewed: 213 (13 ULg) Influence of particle shape on size distribution measurements by 3D and 2D image analyses and laser diffractionCalifice, Arnaud ; Michel, Frédéric ; Dislaire, Godefroid et alin Powder Technology (2013), 237This paper highlights the fact that particle size distribution (PSD) is not unique for the same product, and is dependent on the chosen measurement technique, especially for asymmetric shapes. Laser ... [more ▼]This paper highlights the fact that particle size distribution (PSD) is not unique for the same product, and is dependent on the chosen measurement technique, especially for asymmetric shapes. Laser diffraction and 2D image analysis are commonly used PSD measurement techniques. However, the resultsmay not be representative of the true physical dimensions of the particles. The influence of particle shape on PSD results obtained from 2D/3D image analysis and laser diffraction was investigated. Two metallic powders presenting extreme shape properties (round and elongated particles) were analyzed, as well as a blend of the two pure products. 2D image analysis and laser diffraction results were compared to 3D image analysis (measuring the true particle size). This paper compares the PSD results obtained from the three methods. Some commonly used size parameters in image analysis software did not give meaningful results in regard of the true physical dimensions of the particles. The existence of the two populations (products with extremely different shape and size characteristics) could not be identified with such size parameters, and laser diffraction also performed poorly. The PSD obtained from more precise size parameters (image analysis) better corresponded to the true dimensions of the particles. This study highlights the strengths and weaknesses of particle size analysis techniques when studying products presenting diverse particle shapes, and points out that caution is required in the choice of the size parameters, and in the interpretation of PSD results. [less ▲]Detailed reference viewed: 52 (13 ULg) Laboratory and semi-field environment tests for the control efficacy of Metarhizium anisopliae formulated with neem oil (suneem) against Anopheles gambiae s.l. adult emergenceSeye, Fawrou; Ndione, Raymond Demba; Touré, Mamour et alin Academia Journal of Biotechnology (2013), 1(3), 46-52Metarhizium anisopliae was evaluated previously in Suneem formulation against malaria vector adults. However, their ability to control aquatic stages is not yet evaluated. In laboratory conditions: the ... [more ▼]Metarhizium anisopliae was evaluated previously in Suneem formulation against malaria vector adults. However, their ability to control aquatic stages is not yet evaluated. In laboratory conditions: the lethal dose (LD90) of the formulation was determined on Anopheles gambiae larvae collected from breeding sites and evaluated into artificial vats at dry and rainy seasons. In laboratory conditions, the LD90 was 5.3 × 106 spores/ml in 48 h. In semi-field environment, the formulation had a great emergence inhibition of mosquito adult (P < 0.0001). The emergences rate at day 8 were 2.25 ± 0.03, 28.00 ± 1.07 and 97.25 ± 1.56 % in dry season for the oil formulation (OF), Suneem (S), and water control respectively. In rainy season, the emergences were 1.25 ± 0.15, 30.25 ± 1.23 and 98 ± 0.76 % respectively. No significant difference was observed between dry and rainy seasons (P=0.3). Therefore, M. anisopliae formulated with Suneem may provide a more sustainable management strategy for malaria vectors control at larval stages. [less ▲]Detailed reference viewed: 53 (10 ULg) La philosophie dès le primaire ! Quelques difficultés à surmonterGauthier, Jean-Marie in La philo mode d'emploi (2013), 236Detailed reference viewed: 26 (5 ULg) Le langage olfactif des insectes: un atout pour la lutte biologiqueVerheggen, François in Biofutur (2013), 341Detailed reference viewed: 33 (3 ULg) Présence des Congolais à Bruxelles et postcolonialismesDemart, Sarah in Agir par la culture (2013), 33(printemps), Detailed reference viewed: 7 (1 ULg) High-precision CoRoT space photometry and fundamental parameter determination of the B2.5V star HD 48977Thoul, Anne ; Degroote, Pieter; Catala, Claude et alin Astronomy and Astrophysics (2013), 551We present the CoRoT light curve of the bright B2.5V star HD 48977 observed during a short run of the mission in 2008, as well as a high-resolution spectrum gathered with the HERMES spectrograph at the ... [more ▼]We present the CoRoT light curve of the bright B2.5V star HD 48977 observed during a short run of the mission in 2008, as well as a high-resolution spectrum gathered with the HERMES spectrograph at the Mercator telescope. We use several time series analysis tools to explore the nature of the variations present in the light curve. We perform a detailed analysis of the spectrum of the star to determine its fundamental parameters and its element abundances. We find a large number of high-order g-modes, and one rotationally induced frequency. We find stable low-amplitude frequencies in the p-mode regime as well. We conclude that HD 48977 is a new Slowly Pulsating B star with fundamental parameters found to be Teff = 20000 $\pm$ 1000 K and log(g)=4.2 $/pm$ 0.1. The element abundances are similar to those found for other B stars in the solar neighbourhood. HD 48977 was observed during a short run of the CoRoT satellite implying that the frequency precision is insufficient to perform asteroseismic modelling of the star. Nevertheless, we show that a longer time series of this star would be promising for such modelling. Our present study contributes to a detailed mapping of the instability strips of B stars in view of the dominance of g-mode pulsations in the star, several of which occur in the gravito-inertial regime. [less ▲]Detailed reference viewed: 21 (13 ULg) Composition chimique et test d’efficacité in vitro des huiles essentielles extraites de feuilles fraîches du basilic commun (Ocimum basilicum) et du basilic tropical (Ocimum gratissimum) sur Salmonella enterica sérotype Oakland et Salmonella enterica sérotype LegonKpodekon, MT; Boko, KC; Mainil, JG et alin Journal de société Ouest-Africaine de Chimie (2013)Detailed reference viewed: 67 (4 ULg) Unusual Amino Acids and Monofluoroacetate from Dichapetalum michelsonii (Umutambasha), a Toxic Plant from RwandaEsters, Virginie ; Karangwa, Charles; Tits, Monique et alin Planta Medica (2013), 79In the course of our investigations on Umutambasha in order to identify its convulsant principles, small quantities of monofluoroacetate were observed in stem bark, leaves, and fruits of this plant newly ... [more ▼]In the course of our investigations on Umutambasha in order to identify its convulsant principles, small quantities of monofluoroacetate were observed in stem bark, leaves, and fruits of this plant newly identified as Dichapetalum michelsonii Hauman. Conclusive evidence for a monofluoroacetate presence came from its isolation from the freeze-dried extract of stem bark. Three free unusual amino acids, named N-methyl-α-alanine, N-methyl-β-alanine, and 2,7-diaminooctan-1,8-dioic acid, described for the first time in a plant, and known trigonelline were also isolated from the stem bark of D. michelsonii. Structure elucidations were mainly achieved by spectroscopic methods (1H-NMR, 2D-NMR, MS) and by comparison with authentic references. These unusual amino acids were detected by a fast, reliable TLC analysis in all our batches of Umutambasha, suggesting that they could be used for identification purposes in case of human or livestock intoxications. Finally, EEG recordings and behavioural observations performed in mice suggested that the convulsive patterns produced by Umutambasha are the consequence of monofluoroacetate presence in D. michelsonii. [less ▲]Detailed reference viewed: 7 (0 ULg) Kein Ey gleicht dem anderen. Rezension zu "Im Bergwerk der Sprache"Viehöver, Vera in ReLü: Rezensionszeitschrift zur Literaturübersetzung (2013)Detailed reference viewed: 10 (0 ULg) Identification and structure elucidation of four cannabimimetic compounds in seized productsDenooz, Raphaël ; VAN HEUGEN, Jean-Claude ; Frederich, Michel et alin Journal of Analytical Toxicology (2013), 37(2), 56-63Since 2008, herbal mixtures with synthetic cannabinoid compounds have been sold as incense throughout the world. Although these new drugs are labeled as not for human consumption, these products are ... [more ▼]Since 2008, herbal mixtures with synthetic cannabinoid compounds have been sold as incense throughout the world. Although these new drugs are labeled as not for human consumption, these products are smoked for their cannabis-like effects. This study reports the structural and spectral elucidation of four cannabimimetic compounds seized in Belgium: (4-methoxyphenyl)-1-(pentyl-1H-indol-3-yl)methanone (RCS-4), 1-(5-fluoropentyl)-3-(1-naphtoyl)indole (AM-2201), 2-(2-chlorophenyl)-1-(1-pentylindol-3-yl)ethanone (JWH-203) and 4-ethylnaphthalen-1-yl-(1-pentylindol-3-yl)methanone (JWH-210). Laboratory investigations were conducted by liquid chromatography (LC)–ultraviolet spectroscopy, high-resolution accurate mass detection and nuclear magnetic resonance (NMR) analysis. This combined analytical approach allowed the detection of illicit compounds for which reference materials were not available. To facilitate identification and to complete existing databases, ultraviolet spectra and NMR data of all seized products are presented. Additionally, LC–quadrupole time-of-flight data were recorded to provide absolute identification. [less ▲]Detailed reference viewed: 55 (29 ULg) Flow-cytometric assessment of damages to Acetobacter senegalensis during freeze-drying process and storageShafiei, Rasoul ; Delvigne, Frank ; Thonart, Philippe in Acetic Acid Bacteria (2013), 2(2(s1)), 10Downstream processes have great influences on bacterial starter production. Different modifications occur to cellular compounds during freeze-drying process and storage of bacterial starters. Consequently ... [more ▼]Downstream processes have great influences on bacterial starter production. Different modifications occur to cellular compounds during freeze-drying process and storage of bacterial starters. Consequently, viability and culturability (multiplication capacity) undergo some changes. In this study, the effects of freeze-drying process and storage conditions were examined on cell envelope integrity, respiration and culturability of Acetobacter senegalensis.