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See detailLithium diisopropylamide as initiator for the anionic polymerization of methacrylates
Antoun, Sayed; Teyssié, Philippe; Jérôme, Robert ULiege

in Macromolecules (1997), 30(6), 1556-1561

The anionic polymerization of a series of methacrylates, i.e. methyl methacrylate (MMA), tert-butyl methacrylate (tBuMA), (dimethylamino)ethyl methacrylate (DMAEMA), and glycidyl methacrylate (GMA), has ... [more ▼]

The anionic polymerization of a series of methacrylates, i.e. methyl methacrylate (MMA), tert-butyl methacrylate (tBuMA), (dimethylamino)ethyl methacrylate (DMAEMA), and glycidyl methacrylate (GMA), has been investigated in THF at −78 °C, by using both lithium diisopropylamide (LDA) and α-lithioethyl isobutyrate (Li-EIB) complexed with LiCl as initiators. Compared to ligated Li-EIB, which is a model for the propagating enolate in the methacrylate anionic polymerization, ligated LDA has quite a comparable initiation efficiency (>90%) and gives rise to polymers with a predictable molecular weight and a narrow molecular weight distribution (MWD < 1.1). The effect of LiCl on the MWD of poly-GMA is less pronounced compared to the other polymethacrylates. An already narrow MWD in the absence of LiCl might be accounted for by an intramolecular coordination of the ion pair by the oxirane group of the (ante)penultimate unit(s) of growing poly GMA. As a direct consequence of the well-controlled anionic polymerization of these methacrylates, pairs of them have been polymerized in a sequential way with formation of well-defined block copolymers. Actually, there is no restriction on the addition order of the comonomers, so that both types of triblocks (ABA and BAB) can be successfully synthesized. Size exclusion chromatography supports that block copolymers are not contaminated by homopolymers, at least in detectable amounts. [less ▲]

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See detailLithium transition metal (Ti, Nb, V) oxide mesoporous thin films: contrasting results when attempting direct synthesis by evaporation-induced self assembly
Caes, Sébastien ULiege; Malherbe, Cédric ULiege; Krins, Natacha ULiege et al

in Microporous and Mesoporous Materials (2013), 172

This work investigates the possibility to prepare mesoporous thin films of Li-Ti, Li-Nb, Li-Nb-V and Li-V oxides through a direct sol-gel EISA route by dissolving a lithium salt in the precursor solution ... [more ▼]

This work investigates the possibility to prepare mesoporous thin films of Li-Ti, Li-Nb, Li-Nb-V and Li-V oxides through a direct sol-gel EISA route by dissolving a lithium salt in the precursor solution. Experimental conditions involve a hydrolysis molar ratio H2O/TM ~10 (TM = Ti,Nb,V) and the common Pluronic structuring agent P123 (EO20-PO70-EO20). Systematic formation of lithium-containing oxides as first-crystallizing phases points to a significant intermixture of lithium and transition metal ions in the inorganic network. In the case of Ti-based and Nb-based oxide films, addition of lithium to the precursor solution is compatible with the formation of amorphous mesoporous films at 350°C. On the contrary, addition of lithium has a detrimental effect on the notoriously difficult formation of vanadium-based mesostructured films: even when replacing half of the vanadium by niobium as a stabilizer, formation of mesostructured films has not been possible in the investigated range of experimental conditions. [less ▲]

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See detailLithogeochemical investigations in the Omolon Region (NE-USSR).
Swennen, R; Bless, M.J.M.; Bouckaert, J et al

in Annales de la Société Géologique de Belgique (1985), 108

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See detailLithographic Manufacturing of Zeroth Order Gratings for Innovative Achromatic IR Phase Shifters - Final Report
Loicq, Jerôme ULiege; Lenaerts, Cedric ULiege; Fleury-Frenette, Karl ULiege et al

Report (2009)

Direct detection and characterization of faint sources around bright astrophysical objects is very difficult due to the large flux ratio between them. For example, an Earth-like exoplanet is typically ... [more ▼]

Direct detection and characterization of faint sources around bright astrophysical objects is very difficult due to the large flux ratio between them. For example, an Earth-like exoplanet is typically about 1010 times fainter than its host star in the visible spectrum, reducing to about 107 in the thermal infrared. Infrared nulling interferometry proposed by Bracewell, in 1978, appears to be one of the most promising techniques to achieve the high angular resolution and high dynamic range required to allow the ambitious detection of the first exobiological tracers on extrasolar Earth-like planets, if they exist. The nulling interferometry technique consists in adjusting the phases of the beams coming from various telescopes (two in the most simple configuration) to produce a fully destructive interference on the optical axis. The quality of the destructive interference or the so-called null depth (N) relies on the optical component ability to induce a very precise phase shift (e.g. π radians for a two-telescope configuration) and a very low amplitude mismatch over the considered wavelength range. Unfortunately, searching for biomarkers in exoplanet atmospheres requires spectroscopic characterization over large spectral bands. For example, the Darwin infrared space interferometer considered by ESA will operate in a wavelength band between 6 and 18 μm, seeking biosignatures like the O3-H2O-CO2 triplet. The huge flux ratio between the parent star and the planet therefore requires unprecedented highperformance broadband achromatic phase shifters (APS). The performance requirement for the APS components directly comes from the 10-7 planet-star contrast but also from the system architecture and the associate amount of residual stellar leakage. [less ▲]

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See detailLes lithométéores au Niger: mise au point.
Ozer, Pierre ULiege

in Würzburger Geographische Arbeiten (2002), (97), 7-32

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See detailLes lithométéores en région sahélienne: un indicateur climatique de la désertification.
Ozer, Pierre ULiege

in Geo-Eco-Trop (2000), 24

Detailed reference viewed: 101 (20 ULiège)
See detailLithometeors and wind velocity in relation with desertification during the dry season from 1951 to 1994 in Niger
Ozer, Pierre ULiege

in DEMAREE, Gaston; Alexandre, Jean; DE DAPPER, Morgan (Eds.) Tropical climatology, meteorology and hydrology : in memoriam Franz Bultot (1924-1995). (1998)

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See detailLithometeors in relation with desertification in the Sahelian area of Niger
Ozer, Pierre ULiege

in Fantechi, R.; Peter, D.; Balabanis, P. (Eds.) et al Desertification in a European Context: Physical and socio-economic aspects (1995)

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See detailLithostratigraphie, sédimentologie et analyse séquentielle du Quartzite de Berlé (Emsien supérieur, Grand-Duché de Luxembourg)
Michel, Jonathan ULiege

Doctoral thesis (2012)

The Lower Devonian is a period of interest because it is characterized by the first transgression of the Rheic Ocean, after the Caledonian orogeny, over the coasts of the Old Red Sandstones Continent. In ... [more ▼]

The Lower Devonian is a period of interest because it is characterized by the first transgression of the Rheic Ocean, after the Caledonian orogeny, over the coasts of the Old Red Sandstones Continent. In the Ardenne Basin, during this transgression, widespread siliciclastic deposits were deposited. From the Lochkovian to the Upper Emsian, the basin underwent various stages of development. The main object of this PhD thesis was to focus on one of these episodes recorded in the Neufchâteau-Wiltz-Eifel Basin. This work is the result of the integration of different techniques, such as field work, microscopic analyses, biostratigraphy, sequence stratigraphy, magnetic susceptibility and diagenesis. The analysis of the microfossil content of four sections in Luxembourg led to the identification of 23 species of spores and 11 species of acritarchs. Biostratigraphically, these spores confirmed the Emsian age of the different lithological units (“Couches de Clervaux”, “Quartzite de Berlé” and “Schistes de Wiltz”). The sedimentological analysis of the Neufchâteau-Wiltz-Eifel Basin is based on the study of more than 600 thin sections from 11 sections covering the entire basin. This study allowed to identify an estuary setting divided into three types of environments: an alluvial, a tidal and finally a marine distal environment. Detailed sedimentology associated with sequence stratigraphy of the whole Neufchâteau-Wiltz-Eifel Basin allowed to propose a vertical and lateral succession model of this estuarine setting. In this model, the “Quartzite de Berlé” corresponds to tidal sand ridges and changes laterally to the flaser bedded sandstones of the top of the “Couches de Clervaux”. This lateral facies transition tends to proof that the “Quartzite de Berlé” is a lenticular deposit. The “Quartzite de Berlé” is a prominent feature in the landscapes and a very resistant rock appreciated as a building material. Diagenesis study allows a better understanding of the mechanisms responsible for these characteristics, trough the identification of different cements and authigenic minerals. Temporal relationships between these different components are integrated in a paragenetic modelisation that includes four distinct phases: an eogenetic, a mesogenetic, a metamorphic and a telogenetic phase. The clay mineralogy (illite cristallinity) shows that the “Quartzite de Berlé” underwent variable conditions of burial, depending of the area considered. Our results point out that this variability is related to the pre-orogenetic rifting stage of the Rhenohercynian Basin. Finally, the use of magnetic susceptibility, suggested that in proximal setting, the magnetic susceptibility signal is mainly controlled by environmental parameters (water agitation, sedimentation rates) and diagenesis. [less ▲]

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See detailLithotritie extracorporelle--systeme Direx. Resultats preliminaires a l'ULg.
de Leval, Jean ULiege; Andrianne, Robert ULiege; Bonnet, Pierre ULiege et al

in Revue Médicale de Liège (1988), 43(9), 332-8

Detailed reference viewed: 104 (10 ULiège)
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See detailLa litière biomaîtrisée en élevage porcin
Nicks, Baudouin ULiege; Desiron, Alain; Canart, Bernard

in Compte rendu de la Journée d'Etude sur Agriculture et Environnement (1994)

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See detailLitigating Cross-Border IP Disputes - issues of Jurisdiction
Wautelet, Patrick ULiege

Learning material (2010)

In this seminar, students are invited to study the fundamentals of cross-border IP disputes, using as an example the rules of jurisdiction in force within the European Judicial Area for patent disputes ... [more ▼]

In this seminar, students are invited to study the fundamentals of cross-border IP disputes, using as an example the rules of jurisdiction in force within the European Judicial Area for patent disputes. Particular attention is paid to the case law of the ECJ and the difficulties patent holders face in obtaining cross-border relief. [less ▲]

Detailed reference viewed: 110 (1 ULiège)
See detailLitige, affaire, cause, et scandale. Réflexions autour de quelques concepts fondamentaux de la sociologie pragmatique
Nachi, Mohamed ULiege

Scientific conference (2009, March)

Analyse de la dynamique des controverses publiques du point de vue de la sociologie pragmatique

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See detailLes litiges contractuels transfrontaliers – le domaine résiduel du droit international privé : le droit belge
Wautelet, Patrick ULiege

in Defossez, Michel; Senechal, Juliette (Eds.) Enforcing contracts. Aspects procéduraux de l'exécution des contrats transfrontaliers en droit européen et international Les litiges contractuels transfrontaliers (2008)

This paper gives a critical overview of the rules of private international law to be found in the Code of Private International Law adopted in Belgium in 2004 in relation to cross-border commercial ... [more ▼]

This paper gives a critical overview of the rules of private international law to be found in the Code of Private International Law adopted in Belgium in 2004 in relation to cross-border commercial contracts. These rules apply in a marginal number of cases due to the priority enjoyed by European rules (such as those found in the Brussels I Regulation and the Rome I Regulation). Nonetheless it is important to analyze whether these rules are well drafted. The analysis reveals serious shortcomings mainly in relation to rules of jurisdiction. On the one hand, the rule pertaining the choice of court agreements gives courts an unnecessary margin of discretion to disregard the agreement of parties. On the other hand, the rule pertaining to the law applicable to agreements, is outdated and based on archaic method of identifying the applicable law. [less ▲]

Detailed reference viewed: 192 (8 ULiège)
See detailLITLE MACK ( SIMMONS) portrait
Sacré, Robert ULiege

Article for general public (1976)

Detailed reference viewed: 22 (0 ULiège)