References of "2003"
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See detailThe Tellnes ilmenite deposit (Rogaland, South Norway): magnetic and petrofabric evidence for emplacement of a Ti-enriched noritic crystal mush in a fracture zone
Diot, Hervé; Bolle, Olivier ULg; Lambert, Jean-Marc et al

in Journal of Structural Geology (2003), 25(4), 481-501

The Tellnes ilmenite deposit, a world class titanium deposit, occurs in the Ana-Sira anorthosite (Rogaland anorthosite province, South Norway). It is mainly made up of an ilmenite-rich norite that has ... [more ▼]

The Tellnes ilmenite deposit, a world class titanium deposit, occurs in the Ana-Sira anorthosite (Rogaland anorthosite province, South Norway). It is mainly made up of an ilmenite-rich norite that has been previously interpreted as injected in a crystal mush state, in a weakness zone of the enclosing anorthosite. This emplacement mechanism has produced a faint orientation in the ore due to the flow of the mush. The internal flow structure of the orebody is studied here using the low-field anisotropy of magnetic susceptibility (AMS) method. Partial anhysteretic remanent magnetization (pAARM) indicates that coarse magnetite is the main mineral responsible for the magnetic fabric. Parallelism of the magnetic fabric with the shape-preferred orientation of the ore-forming minerals is checked using image analysis (IA) from oriented sections (intercept method). Interpretation of the AMS data verified by pAARM and IA, provides information on the magmatic foliation and lineation. Emplacement flow of the ilmenite norite crystal mush occurred in the direction of the orebody, parallel to its walls, and with an average SE 18degrees plunge. The feeder zone was likely situated below a network of veins on the SE end of the orebody. The sickle-shaped outcrop of the deposit suggests a transcurrent, dextral opening of a WNW-ESE-striking weakness zone across the anorthosite pluton. (C) 2002 Elsevier Science Ltd. All rights reserved. [less ▲]

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See detailLe passé récent, la réforme de l'impôt des personnes physiques, le cas des villes
Jurion, Bernard ULg

in Bulletin de Documentation du Ministère des Finances (2003)

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See detailIntroduction au droit social
Kefer, Fabienne ULg; Bredael, Sylvie ULg

Learning material (2003)

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See detailDes statines pour le cerveau?
Sadzot, Bernard ULg; HANS, Grégory ULg; Bottin, P. et al

in Revue Médicale de Liège (2003), 58(10), 621-7

Whether cholesterol lowering decreases risk of stroke has long remained unclear. Large epidemiological studies have found only weak links between cholesterol levels and stroke. Recent studies with statins ... [more ▼]

Whether cholesterol lowering decreases risk of stroke has long remained unclear. Large epidemiological studies have found only weak links between cholesterol levels and stroke. Recent studies with statins, more potent cholesterol lowering agents, have now demonstrated significant reductions of stroke incidence and total mortality when administered for secondary prevention in patients with wide ranges of cholesterol values. It remains unknown if a statin is superior to others for the secondary prevention of stroke. [less ▲]

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See detailA taxonomic reassessment of the Vittiaceae (Hypnales, Bryopsida):evidence from phylogenetic analyses of combined chloroplast and nuclear sequence data
Vanderpoorten, Alain ULg; Goffinet, B.; Hedenäs, L. et al

in Plant Systematics & Evolution (2003), 241

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See detailA local influence approach applied to binary data from a psychiatric study.
Jansen, Ivy; Molenberghs, Geert; Aerts, Marc et al

in Biometrics (2003), 59(2), 410-9

Recently, a lot of concern has been raised about assumptions needed in order to fit statistical models to incomplete multivariate and longitudinal data. In response, research efforts are being devoted to ... [more ▼]

Recently, a lot of concern has been raised about assumptions needed in order to fit statistical models to incomplete multivariate and longitudinal data. In response, research efforts are being devoted to the development of tools that assess the sensitivity of such models to often strong but always, at least in part, unverifiable assumptions. Many efforts have been devoted to longitudinal data, primarily in the selection model context, although some researchers have expressed interest in the pattern-mixture setting as well. A promising tool, proposed by Verbeke et al. (2001, Biometrics 57, 43-50), is based on local influence (Cook, 1986, Journal of the Royal Statistical Society, Series B 48, 133-169). These authors considered the Diggle and Kenward (1994, Applied Statistics 43, 49-93) model, which is based on a selection model, integrating a linear mixed model for continuous outcomes with logistic regression for dropout. In this article, we show that a similar idea can be developed for multivariate and longitudinal binary data, subject to nonmonotone missingness. We focus on the model proposed by Baker, Rosenberger, and DerSimonian (1992, Statistics in Medicine 11, 643-657). The original model is first extended to allow for (possibly continuous) covariates, whereafter a local influence strategy is developed to support the model-building process. The model is able to deal with nonmonotone missingness but has some limitations as well, stemming from the conditional nature of the model parameters. Some analytical insight is provided into the behavior of the local influence graphs. [less ▲]

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See detailPrimary intraventricular brain abscess.
Lambo, A.; NCHIMI LONGANG, Alain ULg; Khamis, J. et al

in Neuroradiology (2003), 45(12), 908-10

We report a primary intraventricular brain abscess in a 13-year-old boy. We discuss possible explanations for this rare occurrence.

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See detailL'histoire des religions et les représentations du temps. En guise de préambule
Pirenne-Delforge, Vinciane ULg

in Pirenne-Delforge, Vinciane; Tunca, Önhan (Eds.) Représentations du temps dans les religions. Actes du Colloque organisé par le Centre d'histoire des religions de l'Université de Liège (2003)

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See detailUn « Front populaire » en Belgique ? L’inexportable exemple français
Lanneau, Catherine ULg

in Les courants politiques et la Résistance : continuités ou ruptures? (2003)

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See detail« ‘Soñar, recordar y vivir con eso’. Los sueños de los Záparas en la construcción del pasado, Amazonia Ecuatoriana »,
Bilhaut, Anne-Gaël ULg

in Estudios Atacameños (2003), 26

The ethnographic study of the Zápara case brings new and original data about memory building processes. The Amazonian Zápara achieve knowledge about their past through dreams that also have a fundamental ... [more ▼]

The ethnographic study of the Zápara case brings new and original data about memory building processes. The Amazonian Zápara achieve knowledge about their past through dreams that also have a fundamental role in their daily life. We will see how their history is constructed by means of dream experiences, and how these are used strategically in the present. Dreams, furthermore, guarantee the cultural and ritual continuity of this group on the verge of extinction. [less ▲]

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See detailThe novel somatostatin analog SOM230 has a broad spectrum of inhibitory action on hormone release by human somatotroph, corticotroph and PRL-secreting pituitary adenomas in vitro
Hofland, L. J.; Van Der Hoek, J.; Van Koetsveld, P. M. et al

in The 85th Annual Meeting of the Endocrine Society - Abstract book (2003)

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See detailExperimental and numerical study on mechanoregulation of tissue differentiation around a loaded implant in a bone chamber
Van Oosterwyck; Geris, Liesbet ULg; Duyck, Joke et al

in Bischoff, G.; Hein, H.-J. (Eds.) Proceedings of the seventh conference of ESEM (2003)

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See detailAbsolute and relative quantification : beyond mutually exclusive word classes.
Brems, Lieselotte ULg; Davidse, Kristin

in Belgian Journal of English Language and Literatures. New Series (2003), 1

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See detailConfinement and cut-off: A model for the Pion Quark Distribution Function
Stassart, Pierre ULg; Bissey, F.; Cudell, Jean-René ULg et al

(2003)

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We ... [more ▼]

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We show that the introduction of non-perturbative effects, linked through a cut-off to the size of the pion, allows the reproduction of important features of the pion quark distribution function. [less ▲]

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See detailCell Handling, Membrane-Binding Properties, And Membrane-Penetration Modeling Approaches Of Pivampicillin And Phthalimidomethylampicillin, Two Basic Esters Of Ampicillin, In Comparison With Chloroquine And Azithromycin
Chanteux, H.; Paternotte, I.; Mingeot-Leclercq, Mp. et al

in Pharmaceutical Research (2003), 20(4), 624-31

PURPOSE: The purpose of this work was to examine and understand the cellular pharmacokinetics of two basic esters of ampicillin, pivaloyloxymethyl (PIVA) and phthalimidomethyl (PIMA), in comparison with ... [more ▼]

PURPOSE: The purpose of this work was to examine and understand the cellular pharmacokinetics of two basic esters of ampicillin, pivaloyloxymethyl (PIVA) and phthalimidomethyl (PIMA), in comparison with lysosomotropic drugs (chloroquine, azithromycin). METHODS: Cell culture studies (J774 macrophages) were undertaken to study uptake and release kinetics and to assess the influence of concentration, pH, proton ionophore (monensin), and MRP and P-gp inhibitors (probenecid, gemfibrozil, cyclosporin A, GF 120918). Equilibrium dialysis with liposomes were performed to directly asses the extent of drug binding to bilayers. Conformational analysis modeling of the drug penetration in bilayers was conducted to rationalize the experimental observations. RESULTS: PIVA and PIMA showed properties in almost complete contrast with those of chloroquine and azithromycin, i.e., fast apparent accumulation and fast release at 4 degrees C as well as at 37 degrees C, saturation of uptake (apparent Kd 40 microM), no influence of monensin, MRP, or P-gp inhibitors; tight binding to liposomes (Kd approx. 40 microM); and sharp increase in calculated free energy when forced in the hydrophobic domain. CONCLUSIONS: Although they are weak organic bases, PIVA and PIMA show none of the properties of lysosomotropic agents. We hypothesize that they remain locked onto the pericellular membrane and may never penetrate cells as such in significant amounts. [less ▲]

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See detailLombalgies et remise au travail : Quel modèle d'intervention privilégier ?
Mairiaux, Philippe ULg

in Médecine du Travail & Ergonomie= Arbeidsgezondheidszorg & Ergonomie (2003), XL(4), 185-188

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See detailRadiothérapie métabolique des douleurs osseuses d'origine métastatique : nouveaux traitements, nouvelles pratiques
Hustinx, Roland ULg; Paulus, Patrick

in Annales de l'Association Belge de Radioprotection = Annalen van de Belgische Vereniging voor Stralingsbescherming (2003), 28

Le traitement palliatif des douleurs osseuses liées à la dissémination métastatique s'est récemment enrichi d'une molécule, le 153Sm-EDTMP (Quadramet). Le traitement classique faisait appel au Strontium ... [more ▼]

Le traitement palliatif des douleurs osseuses liées à la dissémination métastatique s'est récemment enrichi d'une molécule, le 153Sm-EDTMP (Quadramet). Le traitement classique faisait appel au Strontium-89 (Métastron). Alors que ce dernier est un émetteur bêta pur, de longue demi-vie (50,5 jours), le 153Sm émet également un rayonnement gamma de 103 keV, et sa période physique est de 1,95 jours. Dans cet exposé nous envisagerons, du point de vue de la radioprotectio, les propriétés pharmacocinétiques du radiopharmaceutique et les caractéristiques physiques du 153Sm. Nous relaterons également l'expérience acquise dans notre centre avec le 186Re-HEDP. [less ▲]

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See detailRecycling plant wax constituents for chemical defense: hemi-biosynthesis of triterpene saponins from beta-amyrin in a leaf beetle
Laurent, Pascal ULg; Dooms, Cédric; Braekman, Jean-Claude et al

in Naturwissenschaften (Die) (2003), 90(11), 524-527

Several species of Doryphorina leaf beetles from Central- and South America produce oleanane triterpene glycosides in their defensive glands. The presence of pentacyclic triterpenes in insects is ... [more ▼]

Several species of Doryphorina leaf beetles from Central- and South America produce oleanane triterpene glycosides in their defensive glands. The presence of pentacyclic triterpenes in insects is intriguing since they lack the key enzymes necessary to synthesize these compounds. Since beta-amyrin is a common constituent of leaf waxes, we hypothesized that these leaf beetles use this compound as a precursor to their oleanane glycosides. To test this hypothesis we first confirmed the presence of beta-amyrin in Ipomoea batatas, the food plant of Platyphora kollari. Next, adults of P. kollari were fed for 10 days with I. batatas leaf disks painted with a solution of [2,2,3-H-2(3)]beta-amyrin ([2,2,3-H-2(3)]-1). The secretion from their defensive glands was collected and analyzed by HPLC-ESIMS. The results demonstrated that the secretion of beetles fed with an amount of [2,2,3-H-2(3)]beta-amyrin corresponding to the quantity of unlabeled (natural) beta-amyrin present in the leaf disks contained on average 5.1% of [2,2,3-H-2(3)]-3-O-beta-D-glucopyranosyl-(1-->4)-beta-D-glucuronopyranosyl-hederagenin ([2,2,3-H-2(3)]-2), whereas the secretions of beetles fed with 10 times this amount of [2,2,3-H-2(3)]beta-amyrin contained on average 23.9% of [2,2,3-H-2(3)]-2. In both series of experiments, the percentage of labeled versus unlabeled triterpene glycoside in the secretion was positively correlated with the amount of deuterated beta-amyrin ingested. These results demonstrate for the first time that some leaf beetles are able to metabolize a widespread triterpenic constituent of leaf wax into more complex glycosides that are stored in their defensive glands. [less ▲]

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