Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailLithium diisopropylamide as initiator for the anionic polymerization of methacrylates
Antoun, Sayed; Teyssié, Philippe; Jérôme, Robert ULg

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 ▲]

Detailed reference viewed: 38 (1 ULg)
Full Text
Peer Reviewed
See detailLithium transition metal (Ti, Nb, V) oxide mesoporous thin films: contrasting results when attempting direct synthesis by evaporation-induced self assembly
Caes, Sébastien ULg; Malherbe, Cédric ULg; Krins, Natacha ULg et al

in Microporous & 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 ▲]

Detailed reference viewed: 52 (30 ULg)
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

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailLes lithométéores au Niger: mise au point.
Ozer, Pierre ULg

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

Detailed reference viewed: 26 (1 ULg)
See detailLithometeors and wind velocity in relation with desertification during the dry season from 1951 to 1994 in Niger
Ozer, Pierre ULg

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

Detailed reference viewed: 10 (2 ULg)
Peer Reviewed
See detailLithometeors in relation with desertification in the Sahelian area of Niger
Ozer, Pierre ULg

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

Detailed reference viewed: 10 (0 ULg)
Full Text
See detailLithostratigraphie, sédimentologie et analyse séquentielle du Quartzite de Berlé (Emsien supérieur, Grand-Duché de Luxembourg)
Michel, Jonathan ULg

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 ▲]

Detailed reference viewed: 115 (16 ULg)
Peer Reviewed
See detailLithotritie extracorporelle--systeme Direx. Resultats preliminaires a l'ULg.
de Leval, Jean ULg; Andrianne, Robert ULg; Bonnet, Pierre ULg et al

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

Detailed reference viewed: 63 (6 ULg)
Peer Reviewed
See detailLa litière biomaîtrisée en élevage porcin
Nicks, Baudouin ULg; Desiron, Alain; Canart, Bernard

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

Detailed reference viewed: 14 (0 ULg)
Full Text
See detailLitigating Cross-Border IP Disputes - issues of Jurisdiction
Wautelet, Patrick ULg

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: 78 (1 ULg)
See detailLitige, affaire, cause, et scandale. Réflexions autour de quelques concepts fondamentaux de la sociologie pragmatique
Nachi, Mohamed ULg

Scientific conference (2009, March)

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

Detailed reference viewed: 7 (1 ULg)
Full Text
See detailLes litiges contractuels transfrontaliers – le domaine résiduel du droit international privé : le droit belge
Wautelet, Patrick ULg

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: 152 (6 ULg)
See detailLITLE MACK ( SIMMONS) portrait
Sacré, Robert ULg

Article for general public (1976)

Detailed reference viewed: 9 (0 ULg)
Full Text
See detailThe Litterae annuae of 1604
Delfosse, Annick ULg

in Begheyn, P.; Deprez, B.; Fraesen, R. (Eds.) et al Jesuit Books in the Low Countries (1540-1773) (2009)

Detailed reference viewed: 21 (2 ULg)