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Peer Reviewed
See detailDistribution of polluting trace metals along a toposequence in a contaminated suburban field
Dere, Christelle ULg; Cornu, Sophie; Lamy, Isabelle et al

Poster (2002, August)

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See detailDistribution of potential bluetongue vectors on Belgium farms
Zimmer, Jean-Yves ULg; Haubruge, Eric ULg; Francis, Frédéric ULg et al

in Veterinary Record : Journal of the British Veterinary Association (2008), 162(21), 700

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See detailDistribution of Reelin and its cytoplasmic signaling protein, DAB-1 in the forebrain of male canaries
Boseret, Géraldine ULg; Ball, G. F.; Balthazart, Jacques ULg

in Hormones & Behavior (2005, June), 48(1), 90

Detailed reference viewed: 10 (1 ULg)
See detailDistribution of scheelite in magnesian skarns at Traversella (Piemontse Alps, Italy) and Costabonne ( Eastern Pyrénées, France) : Nature of the associated magmatism and influence of fluid composition
Dubru, Michel; Vander Auwera, Jacqueline ULg; van Marcke de Lummen, Guy et al

in Boissonnas, Jean; Omenetto, P. (Eds.) Mineral Deposits within the Ruropean Community (1988)

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See detailDistribution of serotypes of clinical group B streptococci isolated in Belgium: a decade review
MELIN, Pierrette ULg; De Mol, Patrick ULg

in LISSSD Board (Ed.) Abstract book (2008, June)

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See detailDistribution of somatogenic and lactogenic receptors in pregnant cow
Beckers, Jean-François ULg; Wouters-Ballman, P; Ectors, F

Conference (1988)

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See detailDistribution of sputum cellular phenotype in a large asthma cohort: predicting factors for eosinophilic vs neutrophilic inflammation.
SCHLEICH, FLorence ULg; Manise, Maïté ULg; Sele, Jocelyne et al

in BMC Pulmonary Medicine (2013), 13(1), 11

ABSTRACT: BACKGROUND: Phenotyping asthma according to airway inflammation allows identification of responders to targeted therapy. Induced sputum is technically demanding. We aimed to identify predictors ... [more ▼]

ABSTRACT: BACKGROUND: Phenotyping asthma according to airway inflammation allows identification of responders to targeted therapy. Induced sputum is technically demanding. We aimed to identify predictors of sputum inflammatory phenotypes according to easily available clinical characteristics. METHODS: This retrospective study was conducted in 508 asthmatics with successful sputum induction recruited from the University Asthma Clinic of Liege. Receiver-operating characteristic (ROC) curve and multiple logistic regression analysis were used to assess the relationship between sputum eosinophil or neutrophil count and a set of covariates. Equations predicting sputum eosinophils and neutrophils were then validated in an independent group of asthmatics. RESULTS: Eosinophilic (>=3%) and neutrophilic (>=76%) airway inflammation were observed in 46% and 18% of patients respectively. Predictors of sputum eosinophilia >=3% were high blood eosinophils, FENO and IgE level and low FEV1/FVC. The derived equation was validated with a Cohen's kappa coefficient of 0.59 (p < 0.0001). ROC curves showed a cut-off value of 220/mm3 (AUC = 0.79, p < 0.0001) or 3% (AUC = 0.81, p < 0.0001) for blood eosinophils to identify sputum eosinophilia >=3%. Independent predictors of sputum neutrophilia were advanced age and high FRC but not blood neutrophil count. CONCLUSION: Eosinophilic and paucigranulocytic asthma are the dominant inflammatory phenotypes. Blood eosinophils provide a practical alternative to predict sputum eosinophilia but sputum neutrophil count is poorly related to blood neutrophils. [less ▲]

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See detailDistribution of surface carbon dioxide and air-sea exchange in the English Channel and adjacent areas
Borges, Alberto ULg; Frankignoulle, Michel

in Journal of Geophysical Research (2003), 108(C5),

In the present paper we report the distribution of the partial pressure of CO2 (pCO2) in surface waters along 13 transects in the English Channel, covering the four seasons. The spatial and temporal ... [more ▼]

In the present paper we report the distribution of the partial pressure of CO2 (pCO2) in surface waters along 13 transects in the English Channel, covering the four seasons. The spatial and temporal variability of pCO2 is controlled by a complex combination of primary production (from May to June), degradation of organic matter, temperature change, and freshwater inputs. Preliminary air-sea CO2 exchange computations suggest that the Channel is not a major sink of atmospheric CO2 and is probably neutral from the point of view of atmospheric coupling. This is mainly related to a relatively low export and/or burial of organic carbon and intense benthic calcification. [less ▲]

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See detailDistribution of surface carbon dioxide and air-sea exchange in the upwelling system off the Galician coast
Borges, Alberto ULg; Frankignoulle, Michel

in Global Biogeochemical Cycles (2002), 16

Data on the distribution of the partial pressure of CO2 (pCO2) were obtained during six cruises off the Galician coast, a region characterized by a seasonal upwelling. The values of pCO2 over the ... [more ▼]

Data on the distribution of the partial pressure of CO2 (pCO2) were obtained during six cruises off the Galician coast, a region characterized by a seasonal upwelling. The values of pCO2 over the continental shelf are highly variable and range between 265 and 415 matm during the upwelling season and between 315 and 345 matm during the downwelling season. Both the continental shelf and off-shelf waters behave as significant net sinks of atmospheric CO2. The computation of the air-sea fluxes of CO2 over the continental shelf yields a net influx in the range of 2.3 (±0.6) to 4.7 (±1.0) mmol C m 2 d 1 during the upwelling season and 3.5 (±0.8) to 7.0 (±1.5) mmol C m 2 d 1 on an annual basis. During the upwelling season and on an annual basis, although the observed air-sea gradients of CO2 over the continental shelf are significantly stronger than those in off-shelf waters, the computed air-sea CO2 fluxes are not significantly different because of the important incertitude introduced in the calculations by the estimated error on wind speed measurements. The presence of upwelling filaments increases the influx of atmospheric CO2 in the off-shelf waters. During summer, important short-term variations of pCO2 are observed that are related to both upwelling and temperature variations. During winter the cooling of water causes important undersaturation of CO2 related to the effect of temperature on the dissolved inorganic carbon equilibrium constants. [less ▲]

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See detailDistribution of surface water partial CO2 pressure in the English Channel and in the Southern Bight of the North Sea
Frankignoulle, Michel; Bourge, Isabelle; Canon, Christine ULg et al

in Continental Shelf Research (1996), 16

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See detailDistribution of temperature in steel and composite beams and joints under natural fire
Hanus, François; Franssen, Jean-Marc ULg

in Cahier Scientifique - Revue Technique Luxembourgeoise (2010), 2

The present article describes the existing methods and recommendations for the evaluation of temperature profiles in steel beams and joints covered by a concrete slab. Then, modifications and improvements ... [more ▼]

The present article describes the existing methods and recommendations for the evaluation of temperature profiles in steel beams and joints covered by a concrete slab. Then, modifications and improvements to the existing methods are proposed in order to predict more accurately temperatures at the level of the top flange of the beam by accounting for heat fluxes between the steel elements and the concrete slab. The two methods presented in this article differ by the degree of simplicity, the field of applicability and the accuracy of the predicted results. Comparisons with numerical simulations performed in the finite element program SAFIR have been described for the validation of these new methods. It is assumed in these numerical models that the contact between the steel profile and the concrete slab is perfect. The “original” Lumped Capacity Method gives globally good predictions of temperature in steel and composite beams and joints but does not integrate heat fl uxes between the steel elements and the concrete slab. This leads to an over-estimation of temperature in the steel elements during the heating phase and to an under-estimation of temperature during the cooling phase. In order to take these fluxes into consideration in the evaluation of the top flange temperature, it is suggested in the first proposed method to integrate a part of the concrete slab into the heated surface or volume considered in the Lumped Capacitance Method. The Composite Section Method correctly predicts temperature at the level of the top flange under ISO fire or during the heating phase of parametrical fire curves but a delay is observed between these analytical results and those obtained from numerical simulations performed in SAFIR software. In a second method, called Heat Exchange Method, it is proposed to calculate separately the heat fluxes between, on one side, the top flange and, on the other side, the gases of the compartment, the rest of the steel section and the concrete slab. The temperatures given by this latter method are in very good agreement with those obtained from FE models. The use of this method is really less fastidious than the use of FE models, especially for joints, but is limited to a certain type of fire curves (parametrical fire curves defined in the Annex A of the EN 1991-1-2). Finally, a bilinear temperature profi le has been proposed to interpolate the analytically-calculated temperatures at the level of the top and bottom flanges on the total height. This procedure is simple and shows a good agreement with the numerical results in 2-D beam sections and 3-D joint zones during the heating and cooling phases of parametric fire curves. [less ▲]

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See detailDistribution of temperature in steel and composite beams and joints under natural fire
Hanus, François; Franssen, Jean-Marc ULg

Conference (2011, April 29)

Parametric numerical analyses have been performed with SAFIR for the temperature distribution in steel and composite beams and joints subjected to natural fires. A simple model has been derived to ... [more ▼]

Parametric numerical analyses have been performed with SAFIR for the temperature distribution in steel and composite beams and joints subjected to natural fires. A simple model has been derived to calculate the temperature development in the upper flange of the steel section supporting a concrete slab. This model takes into account, not only the heat transfer with the surounding hot gases, but also the heat transfer 1) by conduction with the lower part of the section through the web and 2) with the supported concrete slab. [less ▲]

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See detailDistribution of the foraging activity of females Antarctic fur seal (Actocephalus Gazella)
Dubroca, Laurent; Guinet, Christophe; Lea, Mary-Anne et al

in Oceanographic factors and prey distribution at Kerguelen island : a two-year comparison (2000)

Detailed reference viewed: 26 (0 ULg)
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See detailDistribution of the forces in a bolted connection under shear loading
Pietrapertosa, C.; Piraprez, E.; Jaspart, Jean-Pierre ULg

in Proceedings of the Fifth International Workshop on Connections (2004)

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See detailDistribution of the O[SUB]2[/SUB] infrared nightglow observed with VIRTIS on board Venus Express
Gérard, Jean-Claude ULg; Saglam, Adem ULg; Piccioni, G. et al

in Geophysical Research Letters (2008), 35

We present characteristics of the statistical horizontal distribution of the O[SUB]2[/SUB] infrared nightglow over most of the southern hemisphere observed with the VIRTIS instrument over a period ... [more ▼]

We present characteristics of the statistical horizontal distribution of the O[SUB]2[/SUB] infrared nightglow over most of the southern hemisphere observed with the VIRTIS instrument over a period spanning nearly 11 months of low solar activity. We show that the distribution is inhomogeneous with the regions of brightest emission reaching ~3 MegaRayleighs (MR) located at low latitude near and dawnward of the midnight meridian. The hemispherically averaged nadir brightness is 1.3 MR, in very good agreement with earlier ground based observations. We show that the dayside supply of O atoms is sufficient to produce the observed global O[SUB]2[/SUB] nightglow if approximately 50% of the dayside O production is carried to the nightside by the subsolar to antisolar global circulation. Limb profiles observed at northern mid-latitudes exhibit large intensity variations over short time periods. Calculations with a one-dimensional chemical diffusive model produce an airglow peak at 96 km, in agreement with the limb observations. The atomic oxygen density derived from the best fits to O[SUB]2[/SUB] airglow limb profiles reaches a maximum of 1.8-3.5 × 10[SUP]11[/SUP] cm[SUP]-3[/SUP] at 104 km. [less ▲]

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See detailDistribution of the ultraviolet nitric oxide Martian night airglow: Observations from Mars Express and comparisons with a one-dimensional model
Cox, Cédric ULg; Saglam, Adem ULg; Gérard, Jean-Claude ULg et al

in Journal of Geophysical Research (2008), 113

Limb observations with the SPICAM ultraviolet spectrometer on board the Mars Express orbiter revealed ultraviolet nightglow emission in the delta (190–240 nm) and gamma (225–270 nm) bands of nitric oxide ... [more ▼]

Limb observations with the SPICAM ultraviolet spectrometer on board the Mars Express orbiter revealed ultraviolet nightglow emission in the delta (190–240 nm) and gamma (225–270 nm) bands of nitric oxide. This emission arises from radiative recombination between O(3P) and N(4S) atoms that are produced on the day side and form excited NO molecules on the night side. In this study, we analyze the night limb observations obtained during the MEX mission. In particular, we describe the variability of the emission brightness and its peak altitude. We examine possible correlations with latitude, local time, magnetic field strength or solar activity. We show that the altitude of maximum emission varies between 55 and 92 km while the brightness is in the range 0.2 to 10.5 kR. The total vertical emission rate ranges from 8 to 237 R with an average value of 36 ± 52 R. The observed topside scale height of the emission profile varies between 3.8 and 11.0 km, with a mean value of 6 ± 1.7 km. We use a chemical-diffusive atmospheric model where the eddy coefficient, whose value in the Mars thermosphere is uncertain, is a free parameter to match the observed peak altitude of the emission. The model solves the continuity equation for O(3P), N(4S), and NO using a finite volume method on a one-dimensional grid. We find that the downward flux of N atoms at 100 km varies by two orders of magnitude, ranging from 10E7 to 10E9 atoms cm-2 s-1. [less ▲]

Detailed reference viewed: 72 (35 ULg)