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See detailDistribution stratigraphique et géographique d' Hymenozonotriletes lepidophytus Kedo, cf. Hymenozonotriletes pusillites Kedo et des assemblages Tournaisiens.
Streel, Maurice ULg

in Streel, Maurice; Wagner, R.H. (Eds.) Colloque sur la Stratigraphie du Carbonifère, (1971)

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See detailDistribution, leaching and flux measurements of contaminants in the vadose zone of industrial contaminated sites: a review
Fernandez de Vera, Natalia ULg; Vanclooster, Marnik; Brouyère, Serge ULg

Report (2012)

This document is a review of state of science regarding flux measurement technologies in the vadose zone. Initially, a description of distribution and leaching of inorganic contaminants in the vadose zone ... [more ▼]

This document is a review of state of science regarding flux measurement technologies in the vadose zone. Initially, a description of distribution and leaching of inorganic contaminants in the vadose zone is provided. Such description is followed by a review of vadose zone techniques that are applied for measuring contaminant fluxes. At the end of the document the applicability of such techniques to industrial contaminated sites is discussed. [less ▲]

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See detailDistribution, origin and cycling of carbon in the Tana River (Kenya): a dry season basin-scale survey from headwaters to the delta
Bouillon, S.; Abril, G.; Borges, Alberto ULg et al

in Biogeosciences (2009), 6

The Tana River basin (TRB) is the largest in Kenya (_120 000 km2). We conducted a survey during the dry season throughout the TRB, analyzing a broad suite of biogeochemical parameters. Biogeochemical ... [more ▼]

The Tana River basin (TRB) is the largest in Kenya (_120 000 km2). We conducted a survey during the dry season throughout the TRB, analyzing a broad suite of biogeochemical parameters. Biogeochemical signatures in headwater streams were highly variable. Along the middle and lower river course, total suspended matter (TSM) concentrations increased more than 30-fold despite the absence of tributary inputs, indicating important resuspension events of internally stored sediment. These resuspended sediment inputs were characterized by a lower and 14C-depleted OC content, suggesting selective degradation of more recent material during sediment retention. Masinga Dam (a large reservoir on the upper river) induced a strong nutrient retention (_50% for inorganic N, _72% for inorganic phosphate, and _40% for dissolved silicate). Moreover, while DOC pools and _13C signatures were similar above, in and below the reservoir, the POC pool in Masinga surface waters was dominated by 13C-depleted phytoplankton, which contributed to the riverine POC pool immediately below the dam, but rapidly disappeared further downstream, suggesting rapid remineralization of this labile C pool in the river system. Despite the generally high turbidity, the combination of relatively high oxygen saturation levels, low _18O signatures of dissolved O2 (all <+24.2‰), and the relatively low pCO2 values suggest that in-stream primary production was significant, even though pigment data suggest that phytoplankton makes only a minor contribution to the total POC pool in the Tana River. [less ▲]

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See detailA distribution-free joint test and one-directional robust tests for random individual effects and heteroscedasticity allowing for unbalanced panels
Lejeune, Bernard ULg

Conference (1999, August 29)

This paper proposes a convenient testing procedure designed for detecting, from preliminary (pooled) OLS estimation of the model, the possible simultaneous presence of indivi-dual effects and ... [more ▼]

This paper proposes a convenient testing procedure designed for detecting, from preliminary (pooled) OLS estimation of the model, the possible simultaneous presence of indivi-dual effects and heteroscedasticity in the error of a linear panel data regression model. The proposed testing procedure consists in (1) a distribution-free and allowing for unbalanced panel joint pseudo-LM test of the null of no individual effect and no heteroscedasticity and (2) a BMCP based on distribution-free and again allowing for unbalanced panel robust one-directional pseudo-LM tests for identifying the source(s) of departure from the joint null when it is rejected. An empirical example illustrates the usefulness of the testing procedure. [less ▲]

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See detailA distribution-free joint test for random individual effects and heteroscedasticity allowing for incomplete panels
Lejeune, Bernard ULg

Conference (1999, June 04)

This paper proposes a convenient testing procedure designed for detecting, from preliminary (pooled) OLS estimation of the model, the possible simultaneous presence of individual effects and ... [more ▼]

This paper proposes a convenient testing procedure designed for detecting, from preliminary (pooled) OLS estimation of the model, the possible simultaneous presence of individual effects and heteroscedasticity in the error of a linear panel data regression model. The proposed testing procedure consists in (1) a distribution-free and allowing for unbalanced panel joint pseudo-LM test of the null of no individual effect and no heteroscedasticity and (2) a BMCP based on distribution-free and again allowing for unbalanced panel robust one-directional pseudo-LM tests for identifying the source(s) of departure from the joint null when it is rejected. An empirical example illustrates the usefulness of the testing procedure. [less ▲]

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See detailDistributions des valeurs extrêmes
Donneau, Anne-Françoise ULg

Master's dissertation (2002)

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See detailThe distributions of the OH (Δv=1) and (Δv=2) emissions on the Venus nightside
Soret, Lauriane ULg; Gérard, Jean-Claude ULg; Piccioni, Giuseppe et al

Conference (2010, September)

The presence of OH was detected in the spectrum of the Venus mesosphere observed at the limb with the VIRTIS instrument on board the Venus Express spacecraft [3]. The (1-0) and (2-1) transitions at 2.80 ... [more ▼]

The presence of OH was detected in the spectrum of the Venus mesosphere observed at the limb with the VIRTIS instrument on board the Venus Express spacecraft [3]. The (1-0) and (2-1) transitions at 2.80 and 2.94 mm, respectively and the (2-0) band at 1.43 mm were clearly identified. The results of this study show that a correlation is observed between the emissions associated to the Δv=1 and the Δv=2 sequences. [less ▲]

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See detailThe distributions of the OH Meinel and O[SUB][/SUB](a[SUP]1[/SUP]Δ-X[SUP]3[/SUP]Σ) nightglow emissions in the Venus mesosphere based on VIRTIS observations
Gérard, Jean-Claude ULg; Soret, Lauriane ULg; Saglam, Adem ULg et al

in Advances in Space Research (2010), 45

O[SUB][/SUB](a[SUP]1[/SUP]Δ) and recently discovered OH Meinel nightglow emissions have been observed at the limb with the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS-M) instrument on board ... [more ▼]

O[SUB][/SUB](a[SUP]1[/SUP]Δ) and recently discovered OH Meinel nightglow emissions have been observed at the limb with the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS-M) instrument on board the Venus Express satellite. Hydroxyl bands belonging to Δv=1 sequence between 2.60and3.14μm and to Δv=2 sequence at 1.40-1.46μm have been unambiguously identified. In this study, we analyze the statistical distribution of the Δv=1 OH Meinel band sequence and the a[SUP]1[/SUP]Δ[SUB]g[/SUB]-X[SUP]3[/SUP]Σ (0-0) band of the O[SUB][/SUB] Infrared Atmospheric bands at 1.27 μm. We also present an analysis of the correlation between the two emissions. From a statistical point of view, we find that the limb intensity of both emissions reach their maximum value near the antisolar point, while they are significantly dimmer in the vicinity of the terminator. The average altitude of the limb emissions peaks are 95.3 ± 3 km and 96 ± 2.7 km, respectively for the OH Δv=1 sequence and O[SUB][/SUB](a[SUP]1[/SUP]Δ) emissions. The average intensities are 0.41 ± 0.37 MR and 28 ± 22 MR, respectively, corresponding to a mean ratio of about 70. The altitude of the OH nightglow layer is closely related to that of the O[SUB][/SUB](a[SUP]1[/SUP]Δ) emission and some level of co-variation of the maximum intensity along the line of sight is observed. It is suggested that the global subsolar to antisolar circulation plays a key in the control of both airglows by carrying oxygen atoms from the day to the night side of the planet. The O atoms recombine to produce O[SUB][/SUB](a[SUP]1[/SUP]Δ) molecules and they also act as precursors of ozone whose reaction with H produces excited hydroxyl. [less ▲]

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See detailThe distributive effects of shifting from public to private provision of retirement income
Delhausse, B.; Pestieau, Pierre ULg; Perelman, Sergio ULg

in Berghman, J.; Cantillon, B. (Eds.) The European Face of Social Security (1993)

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See detailDistributive Justice and Social Equity: Québécois and French Students’ Patterns of Social Justice Perception
Fournier, Bernard ULg; Hudon, Raymond

Conference (1998, July 15)

Multivariate analysis, like correspondence analysis and hierarchical ascendant classification, allow us not only to reduce information collected with several questions, but in a more significant way, to ... [more ▼]

Multivariate analysis, like correspondence analysis and hierarchical ascendant classification, allow us not only to reduce information collected with several questions, but in a more significant way, to stress on the plurality of behaviors and cognitions which coexists inside a given population. However, the theoretical consequences of these possibilities are not always fully used, especially if the objective of the research is to compare survey results between two populations: isn’t it more convenient to keep one or two global images and to suggest hypotheses from this representation? First analyses of the survey results on Distributive Justice and the role of the State show us that French students seem to stress more on the role of State in society and economics than their Québécois counterparts. But many subtleties are hidden by this single image and in fact, for students who filled the survey in 1996, many patterns have to be presented. With a more precise portrait, we can suggest that even a strong economical context like the one we experience today doesn’t lead to homogeneous attitudes for student populations : construction processes of individual’ s reference are still important to study. [less ▲]

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See detailDistributive Justice and Social Equity: Québécois and French Students' Perceptions
Hudon, Raymond; Fournier, Bernard ULg

Conference (1996, July)

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See detailDistributive Justice and the Role of the State. Students’ Opinions in Ontario and Quebec
Fournier, Bernard ULg; Hudon, Raymond; Nesbitt-Larking, Paul

Conference (1997, August 10)

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See detailDistrict heating and energy indicators: a method to assess the link between urban planning characteristics and energy efficiency of district heating networks
Pacot, Pierre-Emmanuel ULg; Reiter, Sigrid ULg

in Proc. of The 7th international symposium on heating, ventilation and air-conditioning (2011)

District heating networks are very common energy systems all over the world but only few studies have been carried out to assess their performances through quality indicators. Moreover, the only energy ... [more ▼]

District heating networks are very common energy systems all over the world but only few studies have been carried out to assess their performances through quality indicators. Moreover, the only energy indicator generally used is the primary energy factor (PEF), which quantifies the primary energy use of a device. However it does not give a complete insight of the whole energy use of district heating networks. In this paper, three other energy indicators are defined to enhance their energy analysis. The use of these energy indicators is highlighted by an application on a specific heating district network and by a sensitivity analysis. Finally, a methodology to assess the link between urban characteristics and energy district heating performance is proposed, based on the developed energy indicators. [less ▲]

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See detailDistrribution of specific thiamine triphosphatase in biological objects
Makarchikov, Alexander F; Bettendorff, Lucien ULg

in News of Biomedical Sciences (2005), 2

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See detailDisturbed Cytokine Production at the Systemic Level in Difficult-to-Control Atopic Asthma: Evidence for Raised Interleukin-4 and Decreased Interferon-gamma Release following Lipopolysaccharide Stimulation.
MANISE, Maïté ULg; SCHLEICH, FLorence ULg; QUAEDVLIEG, Valérie ULg et al

in International Archives of Allergy & Immunology (2012), 158(1), 1-8

Background: Disturbed cytokine production is thought to govern inflammation in asthma, which, in its turn, may lead to uncontrolled disease. The aim of this study was to assess the relationship between ... [more ▼]

Background: Disturbed cytokine production is thought to govern inflammation in asthma, which, in its turn, may lead to uncontrolled disease. The aim of this study was to assess the relationship between cytokine production from blood leucocytes and the level of asthma control. Methods: We compared the production of interleukin (IL)-4, IL-6, IL-10, interferon (IFN)-gamma and tumour necrosis factor-alpha from peripheral blood leucocytes in non-atopic healthy subjects (n = 22), atopic non-asthmatics (n = 10), well-controlled asthmatics [Juniper asthma control questionnaire (ACQ) score <1.5; n = 20] and patients with uncontrolled asthma despite inhaled or oral corticoids (ACQ score >/=1.5; n = 20). Fifty microlitres of peripheral blood was incubated for 24 h with RPMIc, lipopolysaccharide (LPS; 1 ng/ml) or phytohaemagglutinin (1 mug/ml), and cytokines were measured by immunotrapping (ELISA). Results: Both controlled and uncontrolled asthmatics as well as atopic non-asthmatics spontaneously produced more IL-4 than non-atopic healthy subjects (p < 0.001). IL-4 production induced by LPS was significantly greater (p < 0.05) in both asthma groups compared to atopic non-asthmatics and non-atopic healthy subjects. By contrast, IFN-gamma release induced by LPS was lower in uncontrolled asthmatics than in non-atopic healthy subjects (p < 0.05) and controlled asthmatics (p < 0.05). IL-10 release after LPS was greater in uncontrolled asthmatics than in atopic non-asthmatics (p < 0.05). No difference was observed regarding other cytokines. Conclusion: Blood cells from patients with difficult-to-control atopic asthma display highly skewed Th2 cytokine release following LPS stimulation. [less ▲]

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See detailDisturbed sense of agency in checking symptoms
Belayachi, Sanaa ULg

Conference (2008)

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See detailDisturbi del comportamento alimentare nei contesti scolastici e sanitari
D'Amore, Salvatore ULg

Scientific conference (2004, October 15)

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See detailI disturbi dello stato di coscienza come modello di studio dei suoi correlati neurali
Stanziano, Mario; Soddu, Andrea ULg; Papa, Michele et al

in Paradoxa (2009), 3(4), 106-118

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See detailDisulfide bond assignement and folding characterization of peptide toxins by Ion Mobility Mass Spectrometry
Echterbille, Julien ULg; Quinton, Loïc ULg; Rosu, Frédéric ULg et al

Conference (2011, October 11)

Main component of animal venoms is peptide toxins, which are highly structured by several disulfide bridges. Disulfide bridges fill different roles as increasing the toxins efficiency by lowering their ... [more ▼]

Main component of animal venoms is peptide toxins, which are highly structured by several disulfide bridges. Disulfide bridges fill different roles as increasing the toxins efficiency by lowering their immunogenicity or providing the adequate conformation to efficiently bind to the biological receptor. The sequencing and the determination of the cysteine pairing is still challenging and therefore an important step in structural analysis. In this work, we present a new strategy to sequence structured toxins and assign S-S bridges using ion mobility resolved MS/MS. The method relies on the analysis of partially reduced multiple-disulfide peptide. The mixture of the different forms is resolved by ion mobility, followed by MS/MS acquisition on each mobility separated species. The proof of concept has been successfully conducted on α-CnI, a toxin purified from the venom of Conus consors marine snail. The toxin’s sequence contains four cysteines linked together with two disulfide bridges. α-CnI was partially reduced by a small excess of tris(carboxyethyl)phosphine (10:1). The resulting mixture was purified before analysis by infusion nanoESI-Synapt-G2. Fragmentation was performed after the mobility cell, to obtain specific fragments of each species. Partial reduction of α-CnI results in a mixture of oxidized (the two disulfides are formed), reduced (the two disulfides have been reduced) and partially reduced forms (one of the two disulfides has been reduced). The arrival time distribution of triply charged ions reveals the presence of 4 different species, characterized by different relative cross sections in the gas-phase. Mass matching allows identifying the species: the first mobility (the most compact structure) was identified to be the oxidized folded toxin (M). The latest peak, corresponding to the larger cross-section, was identified as the fully reduced toxin (M+4Da). The second and the third mobility peaks were attributed to the two partially reduced forms in which only one disulfide bridge was reduced (M+2Da). The change in ion mobility depends on which S-S bridge is reduced. Ion mobility separated species give characteristic fragment ions upon fragmentation in the transfer cell (i.e. after ion mobility separator). Interestingly, fragment ions coming from partially reduced species, especially the C-S or S-S bond cleavages, clearly indicates that the disulfide linkage of α-CnI is (Cys1-Cys3) and (Cys2-Cys4) as expected from literature. The method is now being applied with success to more complex systems containing 3 or 4 disulfide bridges. The influence of the charge state on the mobility separation is systematically analyzed in terms of structural implications. [less ▲]

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