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See detailProduction laitière et santé mammaire (Bio Ingénieurs)
Hanzen, Christian ULg

Learning material (2013)

Ce cours de 4 heures s'inscrit dans cadre du module "Production laitière par le ruminant" dispensé aux étudiants de master bio-ingénieur en sciences agronomiques. Les objectifs spécifiques ont été définis ... [more ▼]

Ce cours de 4 heures s'inscrit dans cadre du module "Production laitière par le ruminant" dispensé aux étudiants de master bio-ingénieur en sciences agronomiques. Les objectifs spécifiques ont été définis en accord avec le professeur Yves Beckers co-responsable du module. Ce cours a pour objectif général de définir la mammite, ses conséquences, ses signes d'alerte au niveau de l'individu et du troupeau, son approche diagnostique, ses facteurs de risque au niveau individuel et d'élevage et ses grandes lignes d'approche thérapeutique. [less ▲]

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See detailPhysical properties and transmission spectrum of the WASP-80 planetary system from multi-colour photometry
Mancini, L.; Southworth, J.; Ciceri, S. et al

in Astronomy and Astrophysics (2013), 1312

WASP-80 is one of only two systems known to contain a hot Jupiter which transits its M-dwarf host star. We present eight light curves of one transit event, obtained simultaneously using two defocussed ... [more ▼]

WASP-80 is one of only two systems known to contain a hot Jupiter which transits its M-dwarf host star. We present eight light curves of one transit event, obtained simultaneously using two defocussed telescopes. These data were taken through the Bessell I, Sloan griz and near-infrared JHK passbands. We use our data to search for opacity-induced changes in the planetary radius, but find that all values agree with each other. Our data are therefore consistent with a flat transmission spectrum to within the observational uncertainties. We also measure an activity index of the host star of log R'_HK=-4.495, meaning that WASP-80A shows strong chromospheric activity. The non-detection of starspots implies that, if they exist, they must be small and symmetrically distributed on the stellar surface. We model all available optical transit light curves to obtain improved physical properties and orbital ephemerides for the system. [less ▲]

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See detailPreliminary description of the diet of Hippopotamus amphibius L. in Loango National Park (Gabon)
Michez, Adrien ULg; Doucet, Jean-Louis ULg; Dendocker, Nicolas et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2013), 17(4),

Due to the paucity of suitable habitat, hippos are very rare in the Congo Bassin. Compared to East-African populations, Central African populations of hippos have been less studied. Information found in ... [more ▼]

Due to the paucity of suitable habitat, hippos are very rare in the Congo Bassin. Compared to East-African populations, Central African populations of hippos have been less studied. Information found in the literature regarding the animal’s basic ecology is limited. This study focuses on the description of the diet of an isolated hippo population in Loango National Park (Gabon), comparing faecal analysis with a reference collection ofherbaceous species from the savannas. The effectiveness of using faecal analysis versus using the floristic description of hippos’ pastures was demonstrated. The most frequent herbaceous species identified in faeces samples were Paspalum vaginatum, Axonopus compressus, Stenotaphrum secundatum (Poaceae) and Desmodium triflorum (Fabaceae). The voluntary consumption of a dicotyledonous species (Desmodium triflorum) is novel for this species. [less ▲]

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See detailEarly-type stars observed in the ESO UVES Paranal Observatory Project - IV. Studies of CN, CH+ and CH in the interstellar medium
Smoker, J.; Ledoux, C.; Jehin, Emmanuel ULg et al

in Monthly Notices of the Royal Astronomical Society (2013)

High spectral resolution (˜80 000) and signal-to-noise observations from the Ultraviolet and Visual Echelle Spectrograph Paranal Observatory Project (UVES-POP) are used to study the interstellar molecular ... [more ▼]

High spectral resolution (˜80 000) and signal-to-noise observations from the Ultraviolet and Visual Echelle Spectrograph Paranal Observatory Project (UVES-POP) are used to study the interstellar molecular lines CN (3874 Å), CH[SUP]+[/SUP] (3957, 4232 Å) and CH (3886, 4300 Å) towards 74 O- and B-type stellar sightlines. Additionally, archive data are presented for 140 ELODIE early-type stellar sightlines at R = 42 000, plus 25 FEROS at R = 48 000 and 3 UVES at R > 50 000, mainly in the CH[SUP]+[/SUP] (4232 Å) and CH (3886, 4300 Å) transitions. Detection rates are ˜45 per cent for CN and ˜67 per cent for the other lines in the POP sample, and ˜10-15 per cent for CH[SUP]+[/SUP] and CH lines in the additional sample. CH and CH[SUP]+[/SUP] are well correlated between log[N(CH) cm[SUP]-2[/SUP]]˜12-14, implying that these clouds are CH[SUP]+[/SUP]-like CH and not CN-like CH. CH is also very well correlated with Na I D in the range log[N(Na I cm[SUP]-2[/SUP]]) ˜12.2-14.2. A few sightlines show tentative velocity shifts of ˜2 km s[SUP]-1[/SUP] between CH and CH[SUP]+[/SUP], which appear to be caused by differences in component strength in blends, and hence do not provide firm evidence for shocks. Finally, we describe a search for [SUP]13[/SUP]CH[SUP]+[/SUP] in a sightline towards HD 76341. No [SUP]13[/SUP]CH[SUP]+[/SUP] is detected, placing a limit on the [SUP]13[/SUP]CH[SUP]+[/SUP] to [SUP]12[/SUP]CH[SUP]+[/SUP] ratio of ˜0.01. If a formal fit is attempted, the equivalent width ratio in the two isotopes is a factor ˜90 but with large errors. [less ▲]

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See detailWR 138: new results from X-ray and optical spectroscopy
Palate, Matthieu ULg; Rauw, Grégor ULg; De Becker, Michaël ULg et al

in Astronomy and Astrophysics (2013), 560

Massive-binary evolution models predict that some systems will go through an evolutionary phase where the original primary has become a supernova and left a compact object behind that then orbits a Wolf ... [more ▼]

Massive-binary evolution models predict that some systems will go through an evolutionary phase where the original primary has become a supernova and left a compact object behind that then orbits a Wolf-Rayet (WR) star. WR 138 is an X-ray bright WR star that has been described as a triple system, including a compact companion in a short-period orbit. Our goal is to search for spectroscopic evidence of a compact companion around WR 138. We used optical and X-ray spectra to search for signatures of a compact companion, which can be revealed by systematic variations in WR optical spectral lines induced by orbital motion of the compact companion or by hard, luminous X-rays from accretion onto this companion. The optical spectra display emission-line profile variations that are most probably caused by clumps inside the stellar winds. The radial velocities do not vary on a short time-scale compatible with the suggested orbital period of a putative compact companion. The X-ray spectra are found to be normal for a WN5-6+OB system with no indication of accretion by a compact companion. There is no evidence for the presence of a compact companion, and we therefore conclude that WR 138 is a normal long-period (P ~ 1521 d) eccentric WR+OB system. [less ▲]

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See detailObservations of Red Giants in the Cluster NGC 6633 by the CoRoT Space Mission and the HARPS and SOPHIE Spectrometers
Barban, C.; Baudin, F.; Poretti, E. et al

in Astronomical Society of the Pacific Conference Series (2013, December 01)

The CoRoT space mission and the HARPS and SOPHIE ground-based spectrometers have observed red giants belonging to the open cluster NGC 6633. Solar-like oscillations are detected in the CoRoT data obtained ... [more ▼]

The CoRoT space mission and the HARPS and SOPHIE ground-based spectrometers have observed red giants belonging to the open cluster NGC 6633. Solar-like oscillations are detected in the CoRoT data obtained for four red giants. Spectroscopic data questions the cluster membership of one of these stars. The combination of these photometric and spectroscopic data will be a unique opportunity to estimate their global parameters as well as to probe their internal structure. [less ▲]

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See detailBrèves considérations sur le budget général des dépenses de l'autorité fédérale
Behrendt, Christian ULg

in Uyttendaele, Marc; Sautois, Joëlle (Eds.) La sixième réforme de l'Etat (2012-2013) : Tournant historique ou soubresaut ordinaire ? (2013, December 01)

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See detailLa Deuxième Guerre mondiale aurait-elle eu un impact sur la population rwandaise? Regard sur l'historiographie de ce tournant historique
Singiza, Dantès ULg

in Bulletin d'Information de l'Association Belge d'Histoire Contemporaine = Mededelingenblad van de Belgische Vereniging voor Nieuwste Geschiedenis (2013), Numéro 4

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See detailNon-Perturbative Effect of Rotation on Dipolar Mixed-Modes in Red Giants
Ouazzani, R.-M.; Goupil, M.-J.; Dupret, Marc-Antoine ULg et al

in Astronomical Society of the Pacific Conference Series (2013, December 01)

The space missions CoRoT (Convection Rotation and Planetary Transits) and Kepler provide high quality data that allows the transport of angular momentum in stars to be investigated by the seismic ... [more ▼]

The space missions CoRoT (Convection Rotation and Planetary Transits) and Kepler provide high quality data that allows the transport of angular momentum in stars to be investigated by the seismic determination of the internal rotation profile. In a former study (Ouazzani et al. 2013b) we test the validity of seismic diagnostics for red giant rotation that are based on a perturbative method. Our aim here is to investigate oscillation spectra when that validity no longer holds. We use a non-perturbative approach implemented in the Adiabatic Code of Oscillations including Rotation (ACOR code) (Ouazzani et al. 2012) that accounts for the eff [less ▲]

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See detailDifferential Seismic Modeling of Stars
Ozel, N.; Mosser, B.; Dupret, Marc-Antoine ULg et al

in Astronomical Society of the Pacific Conference Series (2013, December 01)

CoRoT (Convection Rotation and planetary Transits) observations provide the opportunity to study a large sample of stars ranging from the Main Sequence (MS) to the Red Giant Branch. With the large ... [more ▼]

CoRoT (Convection Rotation and planetary Transits) observations provide the opportunity to study a large sample of stars ranging from the Main Sequence (MS) to the Red Giant Branch. With the large increase in the number of stars showing solar-like oscillations, we intend to extract as much information as possible from a low signal-to-noise ratio (SNR) oscillation spectrum, benefiting from comparison with a reference star having similar seismic and fundamental parameters. We propose a differential method to determine stellar properties of solar-like oscillations which we call “differential seismology of stellar twins”. [less ▲]

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See detailA Photometric Study of the Hot Exoplanet WASP-19b
Lendl, M.; Gillon, Michaël ULg; Queloz, D. et al

in Astronomy and Astrophysics (2013), 552

Context. The sample of hot Jupiters that have been studied in great detail is still growing. In particular, when the planet transits its host star, it is possible to measure the planetary radius and the ... [more ▼]

Context. The sample of hot Jupiters that have been studied in great detail is still growing. In particular, when the planet transits its host star, it is possible to measure the planetary radius and the planet mass (with radial velocity data). For the study of planetary atmospheres, it is essential to obtain transit and occultation measurements at multiple wavelengths. Aims: We aim to characterize the transiting hot Jupiter WASP-19b by deriving accurate and precise planetary parameters from a dedicated observing campaign of transits and occultations. Methods: We have obtained a total of 14 transit lightcurves in the r'-Gunn, I-Cousins, z'-Gunn, and I + z' filters and 10 occultation lightcurves in z'-Gunn using EulerCam on the Euler-Swiss telescope and TRAPPIST. We also obtained one lightcurve through the narrow-band NB1190 filter of HAWK-I on the VLT measuring an occultation at 1.19 μm. We performed a global MCMC analysis of all new data, together with some archive data in order to refine the planetary parameters and to measure the occultation depths in z'-band and at 1.19 μm. Results: We measure a planetary radius of Rp = 1.376 ± 0.046 RJ, a planetary mass of Mp = 1.165 ± 0.068 MJ, and find a very low eccentricity of e = 0.0077-0.0032+0.0068, compatible with a circular orbit. We have detected the z'-band occultation at 3σ significance and measure it to be δFocc,z' = 352 ± 116 ppm, more than a factor of 2 smaller than previously published. The occultation at 1.19 μm is only marginally constrained at δFocc,NB1190 = 1711-726+745 ppm. Conclusions: We show that the detection of occultations in the visible range is within reach, even for 1 m class telescopes if a considerable number of individual events are observed. Our results suggest an oxygen-dominated atmosphere of WASP-19b, making the planet an interesting test case for oxygen-rich planets without temperature inversion. [less ▲]

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See detailÉtude des conditions de vie et d’accessibilité aux soins de santé de qualité des populations en situation de précarité, dans la zone de sante de Bandalungwa à Kinshasa (Congo) grâce à la micro-assurance santé en 2008.
Manzambi Kuwekita, Joseph ULg; Guillaume, Michèle ULg; Balula Semutsari, Marie-Paule et al

in Journal d’Épidémiologie et de Santé Publique (2013), 12

This study investigates the conditions under which populations living in poverty are able to accumulate savings and contribute to a micro-insurance health system to improve their living standards and ... [more ▼]

This study investigates the conditions under which populations living in poverty are able to accumulate savings and contribute to a micro-insurance health system to improve their living standards and access quality health care. We carried out a comprehensive survey in 2008 in the Bandalungwa health zone of Kinshasa. It was based on the Manzambi Model for health financing and the extension of social protection to the poor in developing countries. Each day, the leader of the group hands the members’ contributions to a loan officer. Two micro -entrepreneurs (3%) paid by these funds have disappeared, with the help of a loan officer. The main results of this study show that of all those contributing to the scheme, 78.1% improved their living conditions. 50% were able to start saving while 71.9% of these regularly contributed 1 US$ to the micro-insurance fund. 40.6% regularly contributed 1 US$ to the health micro-insurance fund, 88.5% of these improved their access to health care. When micro-credit promotes significant compulsory savings, the obligatory contribution of one dollar a day to the micro-insurance fund becomes easier and results in improved access to care (p<0.000) for household members. 68% of micro-entrepreneurs who paid their dues improved their purchasing power. If we want to keep people out of poverty, we must find a way to help them with these compulsory savings. The results of this study show that micro-entrepreneurs who have improved their living conditions also saw an improvement in their access to care (86.4%) (p=0.003). The Manzambi model provides a sustainable solution to the problem of health financing and extends social protection to fragile populations in developing countries. It also brings us closer to the objective of "health for all". [less ▲]

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See detailAttribution of Cysteine Connectivities in small toxins - New Prospects Based on Partial Oxidation/Reduction Experiments and Ion-Mobility Mass Spectrometry
Quinton, Loïc ULg; Massonnet, Philippe ULg; Echterbille, Julien ULg et al

Conference (2013, December)

Disulfide bonds are post-translational modifications often found in biological compounds and especially in animal toxins. Disulfide bonds participate in the formation of specific folding of peptides and ... [more ▼]

Disulfide bonds are post-translational modifications often found in biological compounds and especially in animal toxins. Disulfide bonds participate in the formation of specific folding of peptides and proteins, directly related to their biological activity. Cystein pairing determinations are primordial for the synthesis of chemical homologous displaying the same bioactivity than the natural compound. This task appears already difficult when the cysteine pairings have to be determined from large proteins. The combination of physical and chemical techniques such as NMR, enzymatic proteolysis, liquid chromatography and mass spectrometry, is needed to circumvent this difficulty. However, when the work concerns small compounds such as conotoxins, the problem is much more complex due to the low amount of available compound and to the lack of enzymatic cleavage sites between cysteines. In this study, we investigate the case of small peptides that contain two disulphide bonds. The idea is to determine the cystein pairings in such compounds by a chemical partial reduction (or oxidation) of the peptides, followed by the separation of the generated species by ion-mobility mass spectrometry, and their characterisation by tandem mass spectrometry. Up to now, we have investigated the partial reduction not only in solution (with DTT and TCEP) but also in the gas-phase (Electron transfer dissociation), and partial oxidation in solution (with 3-CPBA). The results demonstrate an unexpected complexity of the data, including low fragmentation ratios of peptides and disulfide scramblings. [less ▲]

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See detailPeut-on avoir plusieurs pensées en même temps ? Étude d’une controverse scolaire et de son traitement par Descartes dans L’Entretien avec Burman
Dubouclez, Olivier ULg

in UBB Studia. Philosophia (2013), 58(3), 85-108

According to Burman, Descartes’ proof of the existence of God in the Third Meditation depends on the reader’s ability to attend to several axioms at the same time. However it is a claim endorsed by a wide ... [more ▼]

According to Burman, Descartes’ proof of the existence of God in the Third Meditation depends on the reader’s ability to attend to several axioms at the same time. However it is a claim endorsed by a wide range of Aristotelian schoolmen and by Burman after them that such a simultaneous conception is far beyond the capacity of our mind. Descartes takes an original stand in that controversy : human thought is a temporal process in which ideas not only succeed but also interfere with one another ; meditation can help stretching our attention so as to embrace more than one argument in a same moment. Indeed, metaphysics is not only a matter of order for Descartes, but also of synoptical power. [less ▲]

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See detailRhétorique visuelle et énonciation
Dondero, Maria Giulia ULg

in Visible (2013), 10

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See detailLe coût CO2 du réveillon de Noël
Ozer, Pierre ULg

Article for general public (2013)

Pour vous, j’ai décortiqué le folder publicitaire Spécial Noël « Nos petits prix vous mettent en appétit » de l’hypermarché Carrefour pour préparer le repas familial tant attendu. Et voici ce que j'ai pu ... [more ▼]

Pour vous, j’ai décortiqué le folder publicitaire Spécial Noël « Nos petits prix vous mettent en appétit » de l’hypermarché Carrefour pour préparer le repas familial tant attendu. Et voici ce que j'ai pu concocter pour huit personnes (200 g de produits à tête) avec, entre parenthèses, les kilomètres parcourus entre le pays de production et la Belgique ainsi que les kilogrammes de CO2 émis uniquement pour le transport (souvent aérien et intercontinental) de ces produits achetés. Rappelons ici que le transport aérien émet, en moyenne, 60 fois plus de CO2 que le transport par voie maritime. [less ▲]

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See detailRetrait échoguidé d’un corps étranger localisé dans les tissus mous périphériques
Rizza, Maïlis ULg; Barthelemy, Nicolas ULg; Bolen, Géraldine ULg

in Monde Vétérinaire (Le) : European Veterinary Magazine (2013), 138

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See detailNew developments in artificially layered ferroelectric oxide superlattices
Dawber, Matthew; Bousquet, Eric ULg

in MRS Bulletin (2013), 38

Artifi cially layered superlattices of oxide materials have been intensely investigated for some time, but continue to reveal new potential as a route to advanced functional materials. As well as ... [more ▼]

Artifi cially layered superlattices of oxide materials have been intensely investigated for some time, but continue to reveal new potential as a route to advanced functional materials. As well as considering electrostatics and strain, a more complete picture of the interfaces in these systems also needs to incorporate the possibility of additional structural distortions, electronic redistributions, and complex polarization domain structures. Here we focus on superlattices composed of two perovskite oxide materials, where one is a ferroelectric, and discuss the important interactions between the component materials that determine the behavior of the new artifi cial material. We discuss interfaces both with and without electronic screening. The fi rst class of interface contains technologically relevant ultrathin ferroelectric capacitors and the more recently studied ferroelectric-metal superlattices. In these systems, the infl uence of the ferroelectric polarization decreases rapidly with distance from the interface. By contrast, in systems where the materials adjacent to the ferroelectric layers are dielectrics, the polarization of the ferroelectric layer infl uences the properties of the adjacent layers over a much longer distance, setting the stage for fascinating competition between the properties of the combined materials. [less ▲]

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See detailDiabète et nutrition artificielle : principes de prise en charge
Quilliot, Didier; Malgras, Aurélie; PAQUOT, Nicolas ULg et al

in Nutrition Clinique et Metabolisme (2013), 27(4), 230-235

At home as in the hospital, the diabetic patients are at high risk of malnutrition. In patients with hyperglycemia in artificial nutrition, the primary objective is to to cover their protein needs and ... [more ▼]

At home as in the hospital, the diabetic patients are at high risk of malnutrition. In patients with hyperglycemia in artificial nutrition, the primary objective is to to cover their protein needs and their caloric needs and to optimize accordingly the antidiabetic treatment. Insulin therapy is the treatment of choice. The use of low glycaemic index is probably better, especially for oral supplementation. An equivalent parenteral carbohydrate intake has a hyperglycaemic effect more important than with the oral or enteral way. The management of hyperglycemia in artificial nutrition requires defining glycemic goals, tailored to the patient, to the type and the sequences of artificial nutrition, establishing patterns of insulin therapy and providing accurate adaptation rules. Above the basal requirement, insulin therapy sufficient to meet caloric exposure must be prescribed appropriate in timing with the artificial nutrition. The use of sliding scale as monotherapy is ineffective. This management requires forming the nurse team. The acute phase has passed, the disease stabilized, it is sometimes possible to introduce oral antidiabetic drugs and stop insulin. In this case, we apply the same prescription rules to these drugs as for the patient fed orally. [less ▲]

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