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See detailLes dimensions de la participation de la jeunesse : retour aux années quatre-vingt-dix
Fournier, Bernard ULg; Hudon, Raymond

Conference (2004, May 26)

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See detailLes dimensions de la pauvreté en Wallonie
Schaber, Gaston ULg; Born, Michel ULg; Gavray, Claire ULg

Report (1986)

Detailed reference viewed: 31 (3 ULg)
See detailLes dimensions du capital social : quelle cohérence pour des indicateurs au coeur de la théorie ?
Italiano, Patrick ULg

in Houard, Jean; Jacquemain, Marc (Eds.) Capital social et dynamique régionale (2006)

Analyse statistique des corrélations entre les dimensions structurelles et cognitives du concept de capital social à partir de données d'enquête

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See detailDimensions du dualisme sur le marché du travail
Perelman, Sergio ULg; Rodrigues, Jorgue; Wasmer, Etienne

Conference (2000)

Le marché du travail est-il segmenté en diverses catégories, en différents clusters ? Pour aborder cette question, nous utilisons une démarche consistant à chercher, dans un grand nombre de ... [more ▼]

Le marché du travail est-il segmenté en diverses catégories, en différents clusters ? Pour aborder cette question, nous utilisons une démarche consistant à chercher, dans un grand nombre de caractéristiques individuelles, des dimensions pouvant être interprétées comme l’appartenance à un segment d’un marché du travail dual composé de travailleurs primaires et secondaires. Cette méthode permet d’inclure dans l’analyse un grand nombre de déterminants sans chercher imposer à priori de structure à nos données. Il ressort de l’analyse sur un échantillon représentatif d’employés américains (CPS 1997) et belge (INS-Enquête sur les Forces de Travail 1999) qu’un jeu de variables (genre, position dans la famille et pour les femmes, nombre d’enfants dans les diverses catégories d’âge) permet de classer les individus dans l’un ou l’autre des segments, ceci aussi bien en Belgique qu’aux Etats-Unis. Le cluster 1 comprend en général des hommes, des adultes et des personnels qualifiés, et le cluster 2 des femmes, des jeunes et des travailleurs non-qualifiés. Une interprétation de cette dimension est l’attachement au marché du travail, comme le suggère la littérature du dualisme du marché du travail. Aux Etats-Unis, l’appartenance au segment primaire a des implications fortes sur les salaires et sur les heures travaillées, qui sont plus élevés. En Belgique, les données de salaire non disponibles n’ont pas permis de vérifier ce résultat, mais l’appartenance au segment primaire augmente également les heures et la probabilité d’avoir un contrat permanent. La remarquable similarité des résultats entre la Belgique et les USA s’arrête cependant à la répartition de l’emploi dans les deux segments : le segment secondaire est plus développé aux USA qu’en Belgique. Une conjecture à vérifier est que cela reflète une préférence plus marquée de la société belge pour l’emploi stable du segment primaire, peut-être au prix d’un sous-emploi des catégories du segment secondaire. [less ▲]

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See detailDimensions psychosociales de la santé
Mairiaux, Philippe ULg; Absil, Gaëtan ULg; Govers, Patrick ULg

Learning material (2014)

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See detailLes dimensions spectaculaires du catholicisme baroque : bilan et perspectives
Delfosse, Annick ULg

Conference (2011, March 28)

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See detailLes dimensions territoriales du développement durable
Merenne-Schoumaker, Bernadette ULg

in G.E.O (2004), (55), 45-61

Cet article cherche à montrer les liens étroits entre développement durable et territoires. A cette fin, trois sujets sont abordés : l’explosion de la mobilité, l’étalement urbain et la désurbanisation et ... [more ▼]

Cet article cherche à montrer les liens étroits entre développement durable et territoires. A cette fin, trois sujets sont abordés : l’explosion de la mobilité, l’étalement urbain et la désurbanisation et les risques liés à l’action humaine. Dans chaque cas, un cheminement en quatre temps est proposé :définitions et savoirs de base, faits et causes, problèmes engendrés et pistes de solutions [less ▲]

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See detailDimeric bisindole alkaloids from the stem bark of Strychnos nux-vomica L.
Jonville, Marie-Caroline ULg; Dive, Georges ULg; Angenot, Luc ULg et al

in Phytochemistry (2013), 87

Strychnos nux-vomica L. (Loganiaceae) is famous for its monomeric alkaloid content, such as strychnine, a convulsant poison. The stem bark of the tree is traditionally used to treat intermittent fever in ... [more ▼]

Strychnos nux-vomica L. (Loganiaceae) is famous for its monomeric alkaloid content, such as strychnine, a convulsant poison. The stem bark of the tree is traditionally used to treat intermittent fever in South East Asia. In various studies, it appeared that dimeric indolo-monoterpenic alkaloids possess a promising activity on Plasmodium falciparum. Three bisindolomonoterpenic alkaloids together with strychnochrysine, previously identified in the root bark of S. nux-vomica, were isolated from the stem bark. The structures of these compounds were established using NMR spectroscopy and mass spectrometry. Stereochemistry of the compounds was confirmed by molecular modelling. This then allowed the structural determination of strychnoflavine, a coloured bisindole alkaloid previously isolated from the root bark of the tree. Moreover, the conformational inversion in alkaloids possessing an ether bond in the strychnane moiety could be easily predicted by specific δ 13C NMR values. These longicaudatine-type alkaloids were found to display in vitro antiplasmodial activity against a chloroquine resistant strain and a chloroquine sensitive strain. The most interesting was strychnochrysine showing an IC 50 value at around 10 μM. © 2012 Elsevier Ltd. All rights reserved. [less ▲]

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See detailDimerization and DNA binding properties of the Bacillus licheniformis 749/I BlaI repressor
Filée, Patrice ULg; Vreuls, Christelle ULg; Herman, Raphaël ULg et al

in Journal of Biological Chemistry (2003), 278(19), 16482-16487

In the absence of penicillin, the beta-lactamase encoding gene blaP of Bacillus licheniformis 749/I is negatively regulated by the transcriptional repressor BlaI. Three palindromic operator regions are ... [more ▼]

In the absence of penicillin, the beta-lactamase encoding gene blaP of Bacillus licheniformis 749/I is negatively regulated by the transcriptional repressor BlaI. Three palindromic operator regions are recognized by BlaI: two in the blaP promoter (OP1 and OP2) and one (OP3) in the promoter of the blaI-blaR1 operon. In this study, the dissociation constant of the purified BlaI dimer was estimated at 25 muM by equilibrium ultracentrifugation. Quantitative Western blot analysis indicates that the intracellular concentrations of BlaI in B. licheniformis 749/I and Bacillus subtilis transformed by a multicopy plasmid harboring the beta-lactamase locus (blaP-blaI-blaR1) were lower than (1.9 muM) or in the same range as (75 muM) the dissociation constant, respectively. This suggests that BlaI is partially dimeric in the cytoplasm of these strains and interacts in vivo with its operators as a preformed dimer. This hypothesis is supported by band shift assays on an operator containing a randomized half-operator sequence. The global dissociation constants of the operator-BlaI dimer complexes were measured by band shift assays and estimated as K-dOP1=1.7+/-0.5 10(-15) M-2, K-dOP2=3.3+/-0.9 10(-15) M-2, and K-dOP3=10.5+/-2.5 10(-15) M-2. The role of the DNA binding properties of BlaI on the beta-lactamase regulation is discussed. [less ▲]

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See detailDimethyl sulfide and dimethylsulfoniopropionate profiles in sea ice during winter in the Weddell Sea
Uhlig, C.; Tison, J.-L.; Rintala, J. et al

Conference (2014, March)

This study presents profiles of the organic sulphur components dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) in sea ice cores collected during the AWECS (Antarctic Winter Ecosytem Climate ... [more ▼]

This study presents profiles of the organic sulphur components dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) in sea ice cores collected during the AWECS (Antarctic Winter Ecosytem Climate Study) cruise on RV Polarstern (ANT29-6) in the Weddell Sea. DMS is a semi-volatile sulfur component and under discussion to be climate active, as its oxidation products might act as cloud condensation nuclei - thus cooling the atmosphere. It is produced by enzymatic cleavage of the precursor DMSP, which is synthesized by various types of phytoplankton and serves for example as compatible solute and cryoprotectant. Due to the physico-chemical conditions given, i.e. the high salinity and the icy matrix, sea ice as habitat favors production of high levels of DMSP by the inhabiting microalgae. DMSP and DMS are frequently found in high concentrations in sea ice during spring and summer. The aim of this study was to investigate DMS(P) levels in winter sea ice as data for the winter season is yet scarce, but is of importance for global budgeting. Preliminary results of our study show that DMS(P) production in sea ice in the Weddell Sea is also significant during winter. This stands in contrast to previous measurements in Arctic winter sea ice (CFL-IPY cruise in the Circumpolar Flaw Lead Polynya), where DMS(P) concentrations were very low. Possible explanations for the differences between DMS(P) levels in the Arctic and Antarctic might be the different snow cover and thus insulation, light regimes and also microbial community structure within the ice. DMS(P) levels were generally correlated with chlorophyll a concentrations, although the details are complex and seem to be influenced by species composition and species specific DMSP/Chla ratios. The DMS profiles mirrored the permeability of the sea ice following DMSP in the impermeable areas while showing losses to the ice surface and ice-water interface in the more permeable regions. Winter DMS(P) profiles are furthermore compared to data collected during the following spring cruise of RV Polarstern (ANT29-7) in the Weddell Sea. [less ▲]

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See detailThe Dimethylsulfide Cycle in the Eutrophied Southern North Sea: A Model Study Integrating Phytoplankton and Bacterial Processes
Gypens, N; Borges, Alberto ULg; Speeckaert, Gaëlle ULg et al

in Plos One (2014), 9(1)(e85862 DOI: 10.1371/journal.pone.0085862),

We developed a module describing the dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) dynamics, including biological transformations by phytoplankton and bacteria, and physico-chemical ... [more ▼]

We developed a module describing the dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) dynamics, including biological transformations by phytoplankton and bacteria, and physico-chemical processes (including DMS air-sea exchange). This module was integrated in the MIRO ecological model and applied in a 0D frame in the Southern North Sea (SNS). The DMS(P) module is built on parameterizations derived from available knowledge on DMS(P) sources, transformations and sinks, and provides an explicit representation of bacterial activity in contrast to most of existing models that only include phytoplankton process (and abiotic transformations). The model is tested in a highly productive coastal ecosystem (the Belgian coastal zone, BCZ) dominated by diatoms and the Haptophyceae Phaeocystis, respectively low and high DMSP producers. On an annual basis, the particulate DMSP (DMSPp) production simulated in 1989 is mainly related to Phaeocystis colonies (78%) rather than diatoms (13%) and nanoflagellates (9%). Accordingly, sensitivity analysis shows that the model responds more to changes in the sulfur:carbon (S:C) quota and lyase yield of Phaeocystis. DMS originates equally from phytoplankton and bacterial DMSP-lyase activity and only 3% of the DMS is emitted to the atmosphere. Model analysis demonstrates the sensitivity of DMS emission towards the atmosphere to the description and parameterization of biological processes emphasizing the need of adequately representing in models both phytoplankton and bacterial processes affecting DMS(P) dynamics. This is particularly important in eutrophied coastal environments such as the SNS dominated by high non-diatom blooms and where empirical models developed from data-sets biased towards open ocean conditions do not satisfactorily predict the timing and amplitude of the DMS seasonal cycle. In order to predict future feedbacks of DMS emissions on climate, it is needed to account for hotspots of DMS emissions from coastal environments that, if eutrophied, are dominated not only by diatoms. [less ▲]

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See detailDimethylsulfoniopropionate (DMSP) cell quota of key Southern North Sea spring diatoms and Phaeocystis globosa
Speeckaert, Gaëlle ULg; Gypens, Nathalie; Lancelot, Christiane et al

Poster (2015, April)

Dimethylsulfide (DMS) in the ocean results of complex transformations of dimethylsulfoniopropionate (DMSP) produced by phytoplankton under different controls, including microbial transformation pathways ... [more ▼]

Dimethylsulfide (DMS) in the ocean results of complex transformations of dimethylsulfoniopropionate (DMSP) produced by phytoplankton under different controls, including microbial transformation pathways. The phytoplankton composition is an important factor of variability due to the species dependence of the DMSP production and conversion to DMS. To better appraise the link between phytoplankton diversity and the DMS(P) cycling in the Southern North Sea we present measurements of the DMSP cell quota of key spring phytoplankton species (Skeletonema costatum, Thalassiosira rotula, Rhizosolenia delicatula, Asterionella glacialis, Nitzschia closterium, Chaetoceros debilis, Chaetoceros socialis and Phaeocystis globosa) isolated from the North Sea and maintained in non-limiting and axenic laboratory culture conditions. Results are discussed with regards to literature data and hypothesis currently used in DMS(P) biogeochemical models. [less ▲]

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See detailDiminution de l'hyperventilation d'exercise par le blocage des recepteurs beta-adrenergiques
Scheen, André ULg; Juchmes, J.; Cession-Fossion, A.

in Comptes Rendus des Séances de la Société de Biologie et de ses Filiales (1976), 170(1), 220-3

In normal subjects, beta-adrenergic blockage by propranolol or pindolol reduces exercise hyperventilation (40 to 60% VO2 max).

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See detailDiminution de la consommation maximum d'oxygene apres blocage des recepteurs beta-andrenergiques
Scheen, André ULg; Juchmes, J.; Lennes, G. et al

in Archives Internationales de Physiologie et de Biochimie (1976), 84(5), 915-23

VO2 max, maximum oxygen uptake, has been measured in 4 normal young men, before and after beta-adrenergic blockade (0.5 to 5 mg Pindolol by mouth). Pindolol induces bradycardia and reduces VO2 max. A ... [more ▼]

VO2 max, maximum oxygen uptake, has been measured in 4 normal young men, before and after beta-adrenergic blockade (0.5 to 5 mg Pindolol by mouth). Pindolol induces bradycardia and reduces VO2 max. A statistically significant positive correlation appears between posology of Pindolol and bradycardia, this posology and reduction of VO2 max, and finally between bradycardia and reduction of VO2 max. These correlations indicate that the reduction of VO2 max is best explained by a circulatory limitation of oxygen supply to active muscles. [less ▲]

Detailed reference viewed: 54 (12 ULg)
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See detailDiminution de la secretion d'adrenaline au cours de la diete hypocalorique protelique chez l'obese.
Scheen, André ULg; Cession-Fossion, A.; Scheen, Myriam ULg et al

in Annales d'Endocrinologie (1981), 42(6), 531-6

The protein-supplemented fasting induces a progressive but moderate decrease in blood glucose (-26%) and a marked rise in plasma free fatty acids levels (+ 43%). Nevertheless the secretion of epinephrine ... [more ▼]

The protein-supplemented fasting induces a progressive but moderate decrease in blood glucose (-26%) and a marked rise in plasma free fatty acids levels (+ 43%). Nevertheless the secretion of epinephrine by the adrenal medulla, as indirectly estimated by the ratio of the basal urinary elimination to the recovery percentage from the urine of an epinephrine infusion, shows a significant decrease (- 36%) during the protein diet. Thus the enhanced lipolysis does not result from an adrenergic overactivity but merely depends upon the marked reduction in the plasma insulin level (- 38%). [less ▲]

Detailed reference viewed: 81 (1 ULg)
See detailDiminution de volume d'un macro-adénome à ACTH (silencieux) sous Cabergoline
Khalife, A.; Ronci, N.; Stevenaert, Achille ULg et al

in XVIIème Congrès de la Société Française d'Endocrinologie - Abstract book (1999)

Detailed reference viewed: 12 (0 ULg)