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See detailNiveau de contamination et spéciation des métaux lourds dans l'Oued Fès et l'Oued Sebou.
Bouezmarni, Mohamed ULg; Debbaut, Vincent ULg; Diouri, S. El Edrissi et al

Conference (2010)

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See detailLe niveau de lecture à l'entrée du secondaire en Communauté française de Belgique: Des compétences fragiles et si diverses…
Lafontaine, Dominique ULg

in Enjeux : Revue de Formation Continuée et de Didactique du Français (1997), 41-42(129), 161

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See detailNiveau de production et fécondité des vaches et des troupeaux laitiers wallons
Chapaux, Philippe; Glorieux, Géry; Hanzen, Christian ULg

Poster (2013, December)

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See detailNiveau protéique des régimes à base de maïs deshydraté pour les jeunes bovins en croissance engraissement
Cordiez, Emile ULg; Bienfait, Jean-Marie ULg; Lambot, Olivier et al

in Annales de Médecine Vétérinaire (1974), 118

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See detailLes niveaux d'analyse dans la microstructure de l'Atlas linguistique de la Wallonie
Baiwir, Esther ULg

in Estudis Romànics (2014), 36

Le lecteur de l'ALW constate rapidement que les formes phonétiques n'y sont pas livrées brutes sur des cartes, comme dans les atlas de France par région, ni sous forme de liste, mais bien dans une ... [more ▼]

Le lecteur de l'ALW constate rapidement que les formes phonétiques n'y sont pas livrées brutes sur des cartes, comme dans les atlas de France par région, ni sous forme de liste, mais bien dans une présentation structurée en paragraphes, regroupant selon des critères variables des formes phonétiques distinctes. Après avoir proposé une schématisation de la microstructure du projet, sur base d'une notice-modèle (1), nous détaillerons ces critères de classement (phonologique, morphologique, syntaxique, étymologique, motivationnel ou encore sémantique; 2). Chaque paragraphe de matériaux porte un titre, qui représente d'une façon plus ou moins abstraite les matériaux qu'il comporte. Ce titre peut prendre différentes formes: une orthographe dite « Feller » ou des types reconstruits plus abstraits. Nous tenterons de montrer en quoi ces deux images très différentes des matériaux ne sont pas réductibles l'une à l'autre (3). [less ▲]

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See detailLes niveaux de contamination par les métaux lourds chez deux espèces de Delphinidae: Stenella coeruleoalba et Delphinus delphis
Das, Krishna ULg

Master's dissertation (1996)

Les cétacés occupent le sommet des réseaux trophiques marins. Cette position, combinée à leur longue durée de vie et leur statut d’homéotherme favorise une accumulation de polluants dans leurs tissus ... [more ▼]

Les cétacés occupent le sommet des réseaux trophiques marins. Cette position, combinée à leur longue durée de vie et leur statut d’homéotherme favorise une accumulation de polluants dans leurs tissus (Bouquegneau et al., 1996). Ces animaux s’avèreraient donc d’excellents bioindicateurs potentiels, reflétant la contamination de leur environnement. Dans le cadre de cette étude, les niveaux de mercure total, de sélénium, de cadmium, de zinc, de nickel, de chrome, de plomb, de cuivre et de fer ont été évalués dans différents tissus prélevés sur des dauphins bleus et blancs (Stenella coeruleoalba) et des dauphins communs (Delphinus delphis) provenant du Golfe de Gascogne. Les influences combinées de l’âge, du sexe et du statut reproducteur ont été analysées. Les résultats obtenus lors de nos différentes analyses ont été également confrontés à ceux de la littérature afin de réaliser une comparaison avec d’autres sites. [less ▲]

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See detailNiveaux de pollution en ammoniac, gaz carbonique et bactéries dans l'air des locaux de maternité et de post-sevrage
Nicks, Baudouin ULg; Dechamps, P.; Canart, Bernard et al

in 22èmes Journées de la Recherche Porcine en France (1990)

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See detailNiveaux du plomb sanguin, du plomb urinaire, de l’acide δ-aminolévulinique et des porphyrines urinaires chez les personnes vivant à Kinshasa, R.D. Congo : une étude pilote de biosurveillance
Mputu Malolo, Corneille-Liévin; Ndelo di Phanzu, Josaphat; Marini Djang'Eing'A, Roland ULg et al

Conference (2013, October 18)

Objectives: Existing naturally in the earth’s crust, Lead is a widely used heavy metal. It is an environment toxicant that may deleteriously affect nervous, hematopoietic, skeletal, renal, endocrine and ... [more ▼]

Objectives: Existing naturally in the earth’s crust, Lead is a widely used heavy metal. It is an environment toxicant that may deleteriously affect nervous, hematopoietic, skeletal, renal, endocrine and reproductive systems. Lead is classified in its inorganic form as possible human carcinogen (group 2A) by IARC. Exposure to lead in the environment continues to be a serious public health problem for all ages. Children are particularly susceptible to lead poisoning. They absorb more lead from their environment and their developing central nervous systems are vulnerable to the toxicant. During the last twenty years, important measures of public health were undertaken in several countries to decrease lead exposure. In the best of our knowledge, this is not the case in D.R. Congo. A study indicated a relatively important lead impregnation of the Kinshasa population (mean 120 μg/L). However, there have been no reported studies in the evaluation of the relationship between urinary lead, urinary δ-aminolevulinic acid (δ-AlaU) and urinary porphyrins and lead blood level in Congolese people. This is the aim of this study targeting at first people living in Kinshasa. Methods: Blood lead and urinary lead levels were measured using inductively coupled plasma mass spectrometry. The Bio-Rad ALA/PBG by Column Test and spectrophotometer method were used to quantify the concentration of δ-Ala in urine. The separation of porphyrins was carried out by HPLC coupled with fluorescence detector. Results: 37% of studied population presented blood lead levels above the 100 μg/L threshold (geometric mean: 133.29 μg/L) with a higher concentration in women than in men (140.30 μg/L vs 130.78 μg/L). 50% of children (0-17 years) presented blood lead levels above the 100 μg/L threshold and 43% of the same population presented blood lead levels above 50 μg/L as accepted nowadays in US. In the adult population, some targeted occupations were found to be associated with high blood lead. A small correlation was observed between urinary lead and blood lead, but no correlation was noticed between δ-AlaU and Porphyrins with lead blood levels. Conclusion: This study confirmed a relatively important Pb impregnation of the Kinshasa population and the existence of a major public health issue requiring corrective actions and the implementation of an appropriate regulation. Also, urinary lead, urinary δ-Ala and urinary porphyrins seems to not to be sensitive markers for monitoring exposure to lead. [less ▲]

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See detailNíveis de pertinência da repetição: a noção de figura e fundo e a linearidade do significante
Lindenberg Lemos, Carolina ULg

Conference (2013, May 23)

En demeurant sur les éléments répétitifs des textes, nous seront parfois confrontés à une montée de tension qui semble être liée précisément à cette répétition. Le fait même de l'insistance dans un seul ... [more ▼]

En demeurant sur les éléments répétitifs des textes, nous seront parfois confrontés à une montée de tension qui semble être liée précisément à cette répétition. Le fait même de l'insistance dans un seul élément concentre progressivement les contenus présents dans un centre à chaque fois plus compact. En d'autres termes, une relation d'attente est établie entre le sème duratif d'un procès et le sème terminatif (Greimas & Courtés, 1993: 388). D'autres répétitions, par contre, ne produisent pas ces mêmes impactes. Nous les prenons pour naturelles, et quelques fois pour un élément de cohésion, mais rien de surprenant. Cette hésitation entre les différentes valeurs liées au même mécanisme syntactique nous a amené à la question du niveau de pertinence de la répétition pour les effets observés. Les niveaux d'analyse linguistique selon Benveniste (1995: 127 et ss.) ne se sont pas prouvés productifs, vu que les répétitions dans un même niveau sont parfois pertinentes et parfois pas. Cela peut se vérifier, par exemple, dans l'analyse des rimes d'un poème comme « The raven » de Allan Poe, où la réitération sonore est créatrice de tension. En contraste, les rimes du sonnet 130 de Shakespeare « My mistress' eyes are nothing like the sun » sont aussi signifiantes, mais ne portent pas le même genre de tension. La différence semble demeurer dans le degré saillant de la répétition, c'est-à-dire, si elle est présentée en premier plan ou en arrière-plan. Pour expliciter cette relation, nous faisons appelle à la notion de figure et de fond dans les termes où elle a été incorporée en linguistique (Talmy, 2000; Cadiot & Visetti, 2001). Nous verrons donc que, au delà de la relation spatial présente dans cette notion, elle peut être aussi comprise dans un sens temporel, c'est-à-dire, ce qui a été présenté dans un premier moment comme figure peut passer, dans un deuxième moment, au statut de fond pour une nouvelle figure qui est introduite dans le champ de présence. Cet enchaînement temporel se révèle ainsi essentiel pour l'appréhension de la tension. La linéarité du signifiant apparaît comme une condition pour cet effet, en contraste avec la liberté de lecture des signifiants organisés dans l'espace. Cet exposé propose ainsi d'expliciter la recherche du niveau auquel la répétition devient pertinente pour l'appréhension de la tension en tant qu'effet discursif. Dans ce parcours, nous discuterons, à l'aide d'exemples, l’interaction d'instruments théoriques divers comme la tensivité, la linéarité et la notion figure/fond, pour arriver à une meilleure catégorisation de la position relative de la répétition dans les textes. [less ▲]

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See detailNivelles et Namur : deux maisons francophones d’Annonciades aux Pays-Bas méridionaux (17e-18e s.)
Henneau, Marie-Elisabeth ULg

in Dinet, Dominique; Moracchini, Pierre; Portebos, Marie-Emmanuel (Eds.) Jeanne de France et l'Annonciade (2004)

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See detailNizzoli, Marcello
Prina, Daniela ULg

in Atkinson, Harriet; Edwards, Clive; Kettley, Sarah (Eds.) et al Encyclopedia of Design (in press)

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See detailNK CELLS AND NKG2D LIGANDS IN HPV-ASSOCIATED CERVICAL CANCER
Jacobs, Nathalie ULg; Renoux, Virginie ULg; Dortu, Estelle ULg et al

Poster (2007, April 12)

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See detailNkx6.1 and nkx6.2 regulate alpha- and beta-cell formation in zebrafish by acting on pancreatic endocrine progenitor cells.
Binot, Anne-Catherine; Manfroid, Isabelle ULg; Flasse, Lydie ULg et al

in Developmental Biology (2010), 340(2), 397-407

In mice, the Nkx6 genes are crucial to alpha- and beta-cell differentiation, but the molecular mechanisms by which they regulate pancreatic subtype specification remain elusive. Here it is shown that in ... [more ▼]

In mice, the Nkx6 genes are crucial to alpha- and beta-cell differentiation, but the molecular mechanisms by which they regulate pancreatic subtype specification remain elusive. Here it is shown that in zebrafish, nkx6.1 and nkx6.2 are co-expressed at early stages in the first pancreatic endocrine progenitors, but that their expression domains gradually segregate into different layers, nkx6.1 being expressed ventrally with respect to the forming islet while nkx6.2 is expressed mainly in beta-cells. Knockdown of nkx6.2 or nkx6.1 expression leads to nearly complete loss of alpha-cells but has no effect on beta-, delta-, or epsilon-cells. In contrast, nkx6.1/nkx6.2 double knockdown leads additionally to a drastic reduction of beta-cells. Synergy between the effects of nkx6.1 and nkx6.2 knockdown on both beta- and alpha-cell differentiation suggests that nkx6.1 and nkx6.2 have the same biological activity, the required total nkx6 threshold being higher for alpha-cell than for beta-cell differentiation. Finally, we demonstrate that the nkx6 act on the establishment of the pancreatic endocrine progenitor pool whose size is correlated with the total nkx6 expression level. On the basis of our data, we propose a model in which nkx6.1 and nkx6.2, by allowing the establishment of the endocrine progenitor pool, control alpha- and beta-cell differentiation. [less ▲]

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See detailNMDA-induced striatal brain damage and time-dependence reliability of thionin staining in rats
Haelewyn, B; Alix, Philippe ULg; Maubert, E et al

in Journal of Neuroscience Methods (2008), 168

Excitotoxic neuronal death induced by intracerebral injection of NMDA is a widely used model for investigating the potentially neuroprotective action of pharmacological agents against brain insults ... [more ▼]

Excitotoxic neuronal death induced by intracerebral injection of NMDA is a widely used model for investigating the potentially neuroprotective action of pharmacological agents against brain insults involving excitotoxic processes. Surprisingly, the time-course of NMDA-induced brain damage yet has not been investigated in the rat. Answering this question clearly needs to be assessed, given that the validity of preclinical neuroprotection studies requires to be insured that brain damage has reached a plateau that corresponds to the maximal extension of neuronal death at the time the brain is removed for histological analysis. Here, we investigated the time-course of neuronal death and the time-dependence validity of thionin coloration in rats that were given an intrastriatal injection of NMDA of 50 nmol or 70 nmol. Our results show that, whatever the dose used, NMDA-induced brain damage reaches its maximal value 24-48 h after the insult. They further indicate that the volume values of brain damage as estimated by thionin coloration constitute reliable data when the brain is removed up to 48 h after injection of NMDA. However, if the brain is removed more than 48 h after the excitotoxic insult onset, there is no alternative of using other techniques, such as immunochemical or neuroimaging techniques. [less ▲]

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See detailNMHC Climatology from Central European Mountain Observatories
Plass-Duelmer, C.; Reimann, S.; Wallasch, M. et al

in Geophysical Research Abstracts (2011), 13

NMHC (non-methane hydrocarbons) are a major group of atmospheric trace gases with impact on photochemical processes in the atmosphere, especially oxidant formation with ozone being the most prominent of ... [more ▼]

NMHC (non-methane hydrocarbons) are a major group of atmospheric trace gases with impact on photochemical processes in the atmosphere, especially oxidant formation with ozone being the most prominent of them, and contributions to SOA (secondary organic aerosols). By this, they are coupled to climate issues via the oxidizing capacity of the atmosphere, the greenhouse gas ozone and aerosol effects. NMHC monitoring was initiated in Europe in the “Tropospheric Ozone Research” project (1988-1995), and it was continued in EMEP and GAW (Global Atmosphere Watch) where it is an ongoing initiative which recently has been reinforced (GAW Report 171). In this presentation we will focus on time series from Central European mountain stations (46-49°N, 7-13°E): Hohenpeissenberg (985 m, DWD, Germany, 1998-ongoing), Rigi (1031 m, EMPA, Switzerland, 2003-ongoing), Junfraujoch (3580 m, EMPA, Switzerland, 2000-ongoing, and ULg (FTIR), Belgium, 1984-ongoing), Zugpitze (2650 m, UBA, Germany, 2000-ongoing), Schauinsland (1205 m, FZ-Jülich (1989-94), and UBA, Germany, 2004-ongoing), Brotjacklriegel (1016 m, UBA, Germany, 2000-2004), Donon (775 m, EMD, France, 1997-2007). Most sites used weekly flask samples but also on-line measurements were carried out with higher time resolution within the former TOR project and in the more recent time series at Hohenpeissenberg, Rigi, and Jungfraujoch. All samples were analysed by GC. Additionally to these GC measurements, a time series of column integrated acetylene and ethane by FTIR (Fourier Transform InfraRed spectrometry) is available from Jungfraujoch, from 1984 onwards. We focus here on time series of monthly averages of anthropogenic hydrocarbons over the 1997-2009 time period. They show quite similar patterns among the various stations over the whole period with pronounced seasonal cycles. Significantly lower mixing ratios were measured at the highest elevated sites, the Zugspitze and Jungfraujoch. Differences between the lower mountain sites (775-1200 m) are on first view surprisingly small. Generally, the differences between the high altitude and the other mountain sites are lowest in summer due to enhanced vertical mixing and thermal upslope winds. Downward trends for anthropogenic hydrocarbons are very similar at the various stations and are 2 %/yr for C2-C3 alkanes (+/- 1%), 3-6 %/yr for C4-C7 alkanes (+/- 2%), 2-3%/yr for C2-C3 alkynes and ethene (+/- 2%), 4 % /yr for propene and benzene (+/- 2%), and 5-10%/yr for toluene and xylenes (+/-3 and 5%, respectively). [less ▲]

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See detailNMR and X-ray diffraction analysis of 3-thioamido-5- phosphono-1-cyclohexene derivatives: Conformational and stereochemical assignments
Monbaliu, Jean-Christophe ULg; Tinant, Bernard; Marchand-Brynaert, Jacqueline

in Journal of Molecular Structure (2008)

[4 + 2] Cycloaddition; ; Vinyl phosphonate dienophiles; ; Cyclohexene conformations; NMR analysis; X-ray diffraction

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See detailNMR assignments of the major Cannabinoids and cannabiflavonoids isolated from flowers of Cannabis sativa
Choi, Y. H.; Hazekamp, A.; Peltenburg-Looman, A. M. G. et al

in Phytochemical Analysis (2004), 15(6, NOV-DEC), 345-354

The complete H-1- and C-13-NMR assignments of the major Cannabis constituents, Delta(9)-tetrahydrocannabinol, tetrahydrocannabinolic acid, A-tetrahydrocannabinol, cannabigerol, cannabinol, cannabidiol ... [more ▼]

The complete H-1- and C-13-NMR assignments of the major Cannabis constituents, Delta(9)-tetrahydrocannabinol, tetrahydrocannabinolic acid, A-tetrahydrocannabinol, cannabigerol, cannabinol, cannabidiol, cannabidiolic acid, cannflavin A and cannflavin B have been determined on the basis of one- and two-dimensional NMR spectra including H-1- and (13)-NMR, H-1-H-1-COSY, HMQC and HMBC. The substitution of carboxylic acid on the cannabinoid nucleus (as in tetrahydrocannabinolic acid and cannabidiolic acid) has a large effect on the chemical shift of H-1" of the C5 side chain and 2'-OH. It was also observed that carboxylic acid substitution reduces intermolecular hydrogen bonding resulting in a sharpening of the H-5' signal in cannabinolic acid in deuterated chloroform. The additional aromaticity of cannabinol causes the two angular methyl groups (H-8 and H-9) to show identical H-1-NMR shifts, which indicates that the two aromatic rings are in one plane in contrast to the other cannabinoids. For the cannabiflavonoids, the unambiguous assignments of C-3' and C-4' of cannflavin A and B were determined by HMBC spectra. Copyright (C) 2004 John Wiley Sons, Ltd. [less ▲]

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