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See detailLa ligne et la boucle : une lecture de Michel Strogoff (1876)
Durand, Pascal ULg

Scientific conference (2015, April 29)

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See detailLes Lignées Climaciques de Wallonie
Hendrickx, Sébastien ULg; Van Der Kaa, Claire ULg

Book published by CPDT (2014)

En lien direct avec la cartographie des climax écosystémiques de la wallonie, réalisée dans le cadre de la recherche d'initiative I4 CPDT ayant pour thème "la biodiversité sous l'angle des dynamiques ... [more ▼]

En lien direct avec la cartographie des climax écosystémiques de la wallonie, réalisée dans le cadre de la recherche d'initiative I4 CPDT ayant pour thème "la biodiversité sous l'angle des dynamiques écosystémiques co-évolutive", cet ouvrage facilite la lecture de celle-ci et la rend opérationnelle. Il rassemble une série de fiches, une par lignée climacique identifiée par la cartographie des climax, qui décrivent ces lignées sur le plan biologique mais également en terme d'occupation et d'affectation du territoire. Elles donnent en outre une analyse de la situation existante pour chaque lignée et des recommandations par rapport aux mesures à mettre en oeuvre pour améliorer celle-ci. [less ▲]

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See detailLignées de carcinome prostatique et apoptose: état de la question
Califice, Stéphane ULg; Waltregny, David ULg; Castronovo, Vincenzo ULg et al

in Revue Médicale de Liège (2004), 59(12), 704-10

Prostate cancer is a major pathology in industrialized countries. Tumor growth usually results from increased cell proliferation, conjugated with an inhibition of programmed cell death (apoptosis). In ... [more ▼]

Prostate cancer is a major pathology in industrialized countries. Tumor growth usually results from increased cell proliferation, conjugated with an inhibition of programmed cell death (apoptosis). In this paper, after a short description of the apoptotic mechanisms and their methods of investigation, we review the present knowledge of the implication of different molecular actors in the regulation of apoptosis in prostate cancer cells. This review notably summarizes the present knowledge of the (de)regulation of the effects of androgens, p53, Bcl-2, Bcl-xL, Bax, Akt, PTEN, Par-4, clusterine, caspases and NF-kappaB in prostate adenocarcinoma cell lines and provides an appraisal of their therapeutic potential. A better knowledge of the apoptotic pathways in these cells could indeed allow the development of new selective and effective anti-cancer strategies. [less ▲]

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See detailLes lignes de force de l'accord interprofessionnel pour 2003-2004
Michiels, Olivier ULg

in Journal du Juriste (2003), 23

Plan: Les dispositions relatives aux groupes à risque et aux jeunes auxquels s'applique un parcours d'insertion; La convention de premier emploi; La prépension; Les cotisations et retenues sur les ... [more ▼]

Plan: Les dispositions relatives aux groupes à risque et aux jeunes auxquels s'applique un parcours d'insertion; La convention de premier emploi; La prépension; Les cotisations et retenues sur les avantages complémentaires. [less ▲]

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See detailLes lignes de force du Code pénal social
Kefer, Fabienne ULg

in Peeters, Johan (Ed.) Het Sociaal Strafwetboek gewikt en gewogen (2011)

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See detailLignes de vie
Tomasovic, Dick ULg

in APCVL (Ed.) Lycéens au cinéma en Région Centre - 2003 (2003)

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See detailLigniculture et maintien de la fertilité des sols dans l'Ouest-Cameroun
Njoukam, Raphaël; Bock, Laurent ULg; Hebert, Jacques ULg et al

in Bois et Forêts des Tropiques (1996), (249), 33-49

Detailed reference viewed: 19 (1 ULg)
See detailLignin as a raw material for industrial materials applications
Richel, Aurore ULg; Vanderghem, Caroline ULg; Jacquet, Nicolas ULg et al

Poster (2014)

Native lignin is an abundant biopolymer on earth and represents 15-30% by weight of the lignocellulosic biomass. Lignin is a heterogeneous cross-linked polymer composed of phenylpropane units (guaiacyl ... [more ▼]

Native lignin is an abundant biopolymer on earth and represents 15-30% by weight of the lignocellulosic biomass. Lignin is a heterogeneous cross-linked polymer composed of phenylpropane units (guaiacyl, syringyl or p-hydroxyphenyl) linked together by a panel of specific ether or carbon-carbon bonds.[1] Nowadays, large amounts of lignins and lignin-based wastes are available and originate either from the pulp and paper manufacturing or from the production of bioethanol from lignocellulose. [2] Typically, these lignins are dedicated to energetic purposes by combustion. In recent years however, novel axes for high added value applications have emerged and concern, notably, the use of lignin as performance products (e.g. polymer additives, binders) or specialty chemicals (e.g. surface-active agents) for materials applications.[3] Herein, several applications of lignin in materials sciences with industrial issues are presented. A correlation is established between the extraction processes from lignocellulosic materials and the chemical structure and physico-chemical properties of lignins.[4] Our research group has also developed new methodologies for the extraction of highly pure lignins from several starting materials, including food wastes, herbaceous raw materials and wood biomass. These methodologies include microwave-assisted extraction and two-step conventional pretreatment involving steam explosion. These methodologies are described in this presentation. [less ▲]

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See detailLignin as a raw material for industrial materials applications
Richel, Aurore ULg; Vanderghem, Caroline ULg; Jacquet, Nicolas ULg et al

Poster (2013, October)

Native lignin is an abundant biopolymer on earth and represents 15-30% by weight of the lignocellulosic biomass. Lignin is a heterogeneous cross-linked polymer composed of phenylpropane units (guaiacyl ... [more ▼]

Native lignin is an abundant biopolymer on earth and represents 15-30% by weight of the lignocellulosic biomass. Lignin is a heterogeneous cross-linked polymer composed of phenylpropane units (guaiacyl, syringyl or p-hydroxyphenyl) linked together by a panel of specific ether or carbon-carbon bonds.[1] Nowadays, large amounts of lignins and lignin-based wastes are available and originate either from the pulp and paper manufacturing or from the production of bioethanol from lignocellulose. [2] Typically, these lignins are dedicated to energetic purposes by combustion. In recent years however, novel axes for high added value applications have emerged and concern, notably, the use of lignin as performance products (e.g. polymer additives, binders) or specialty chemicals (e.g. surface-active agents) for materials applications.[3] Herein, several applications of lignin in materials sciences with industrial issues are presented. A correlation is established between the extraction processes from lignocellulosic materials and the chemical structure and physico-chemical properties of lignins.[4] Our research group has also developed new methodologies for the extraction of highly pure lignins from several starting materials, including food wastes, herbaceous raw materials and wood biomass. These methodologies include microwave-assisted extraction and two-step conventional pretreatment involving steam explosion. These methodologies are described in this presentation. [less ▲]

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See detailLignin extraction from Mediterranean agro-wastes: Impact of pretreatment conditions on lignin chemical structure and thermal degradation behavior
Manara, Panagiota; Zabaniotou, Anastasia; Vanderghem, Caroline ULg et al

in Catalysis Today (2014), 223

Three different types of Mediterranean, agro-industrial wastes (olive kernels, grape pomace/seeds, peach kernels), were subjected to two pretreatment processes, a chemical/organosolv and a physicochemical ... [more ▼]

Three different types of Mediterranean, agro-industrial wastes (olive kernels, grape pomace/seeds, peach kernels), were subjected to two pretreatment processes, a chemical/organosolv and a physicochemical one. The organosolv process included lignocellulosic biomass treatment with formic acid/acetic acid/water (30/50/20, v/v%), for 3 h at 107 °C, while the physicochemical method was conducted by immersing the biomass in a water/ethanol (8/92, v/v%), H2SO4 0.32 M, solvent and further exposing the slurry to microwave irradiation (maximum 250 W) for 1/2 h at 150 °C. Both processes were evaluated regarding the achieved delignification and the purity of the extracted lignins. The effect of the pretreatment processes onto the structure and thermal decomposition behavior of the extracted lignins was investigated via FT-IR and TGA analysis, respectively. The objective of the research work was to investigate potential valorization routes for these biomass agro-residues in the context of a biorefinery, focusing on lignin extraction. The pretreatment results showed that the obtained lignins, derived from both procedures, were of high purity (>82 wt%). Under the organosolv procedure, peach kernel delignification showed the maximum value (∼16 wt%), while under microwave pretreatment, olive kernel delignification showed the maximum value (∼35 wt%). Grape pomace/seeds appeared to be the most resistant in both treatments. [less ▲]

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See detailLa lignine, une molécule d'intérêt issue du bioraffinage lignocellulosique
Richel, Aurore ULg

Conference (2012, November)

La mise sur pied d’initiatives de bioraffinage lignocellulosique génère des quantités importantes de lignines sous-exploitées. La lignine, l’une des molécules renouvelables les plus abondantes sur terre ... [more ▼]

La mise sur pied d’initiatives de bioraffinage lignocellulosique génère des quantités importantes de lignines sous-exploitées. La lignine, l’une des molécules renouvelables les plus abondantes sur terre, est un biopolymère fortement ramifié constitué d’unités aromatiques. La composition de ce polymère est fortement influencée par la nature du substrat lignocellulosique et par les conditions de cracking appliquées. Généralement destinée à des fins énergétiques, la lignine se voit aujourd’hui ouvrir de nouvelles pistes de valorisation à plus haute valeur ajoutée telles que des applications comme gaz de synthèse, additif dans le secteur de la plasturgie ou comme source de composés aromatiques destinés au secteur chimique. [less ▲]

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See detailLa lignine, une molécule d'intérêt issue du bioraffinage
Richel, Aurore ULg

in Chimie Nouvelle (2012), 111

The implementation of lignocellulosic biorefinery initiatives generates significant amounts of underexploited lignins. Lignin, one of the most abundant renewable molecules on earth, is a highly branched ... [more ▼]

The implementation of lignocellulosic biorefinery initiatives generates significant amounts of underexploited lignins. Lignin, one of the most abundant renewable molecules on earth, is a highly branched biopolymer consisting of aromatic units. Generally intended for energy purposes, lignin has nowadays opened new vistas for higher added-value applications such as syngas, additive in the plastics industry or as a source of aromatic compounds dedicated to the chemical sector. This article provides an update on this molecule and its potential applications. [less ▲]

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See detailLignocellulosic biomass pretreatment impact on the extracted lignins chemical structure
Manara, Panagiota; Zabaniotou, Anastasia; Vanderghem, Caroline ULg et al

Poster (2013, October)

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See detailLignosulfonate promotes the interaction between Scots pine and an ectomycorrhizal fungus Pisolithus tinctorius in vitro
Niemi, Karoliina; Kevers, Claire ULg; Haggman, Hely

in Plant and Soil (2005), 271(1-2), 243-249

Lignosulfonate (LS) is a lignin-based polymer obtained as a by-product from paper industry, which may have potential as an amendment with macronutrients. We studied effects of LS on the interaction ... [more ▼]

Lignosulfonate (LS) is a lignin-based polymer obtained as a by-product from paper industry, which may have potential as an amendment with macronutrients. We studied effects of LS on the interaction between Scots pine (Pinus sylvestris L.) seedlings and hypocotyl cuttings and the ectomycorrhizal (ECM) fungus Pisolithus tinctorius (Pers.) Coker and Couch. The experiments were performed in vitro on the MMN agar medium containing Fe-LS chelate at the concentrations of 0, 5, 10 and 25 mg/L. Inoculation with P. tinctorius increased root growth of the seedlings. Fe-LS enhanced P. tinctorius induced formation of lateral roots and had a dose-dependent positive effect on the establishment of mycorrhizas on the seedlings. The growth of the fungal mycelium was improved by Fe-LS, which might cause faster and more intensive contact with the roots and, thus, better root growth and mycorrhiza formation. P. tinctorius enhanced also adventitious root formation and subsequent root growth of the hypocotyl cuttings but without any synergistic effect with Fe-LS. Our study with P. tinctorius and Scots pine in vitro indicates that a low-cost by-product Fe-LS, obtained from paper industry, may be a potential tool to improve the efficiency of fungal inoculations, thus, facilitating the early interaction between an ECM fungus and host seedling. [less ▲]

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See detailLignum vitae. Le culte de la Sainte Croix
George, Philippe ULg

in Liège. Autour de l'an mil, la naissance d'une principauté (Xe-XIIe siècle) (2000)

Detailed reference viewed: 12 (0 ULg)
See detailLikelihood based inference for semi-competing risks
Heuchenne, Cédric ULg; Legrand, Catherine; Laurent, Stéphane ULg et al

E-print/Working paper (2011)

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See detailLikelihood based inference for semi-competing risks
Heuchenne, Cédric ULg; Laurent, Stéphane ULg; Legrand, Catherine et al

in Communications in Statistics : Simulation & Computation (2014), 43(5), 1112-1132

Detailed reference viewed: 55 (7 ULg)
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See detailLikely Detection of UV Auroral Emission from the Magnetic Footprint of Callisto
Clarke, John; Bhattacharyya, Dolon; Montgomery, Jordan et al

Poster (2012, December 06)

A large number of UV images of Jupiter's aurora were obtained in 2007/2008 with the Hubble Space Telescope (HST) ACS/SBC camera. The initial results on variations with the solar wind conditions have been ... [more ▼]

A large number of UV images of Jupiter's aurora were obtained in 2007/2008 with the Hubble Space Telescope (HST) ACS/SBC camera. The initial results on variations with the solar wind conditions have been published elsewhere, but the large database permits other studies to be performed. In particular, while auroral emissions have been detected from the magnetic footprints of Io, Europa, and Ganymede in Jupiter's atmosphere, the footprint of Callisto has been located too close to the main auroral oval to be detected. We have thus analyzed images of the ultraviolet auroral emissions of Jupiter taken using the F115LP filter on the HST/ACS instrument. Using a unique co-addition method, we have identified a strong candidate for the footprint of Callisto on May 24, 2007. We tested this finding by applying the same co-addition method to a nearly identical auroral configuration on May 30, 2007 when Callisto was well removed in its orbit. Comparing the two co-added images, we can clearly see the presence of Callisto’s footprint on the 24th and its absence on the 30th. The method relies as well on the motion of Callisto's footprint remaining under the satellite, while most of the auroral emissions rotate with the planet. The images and analysis method will be presented in this presentation. [less ▲]

Detailed reference viewed: 30 (5 ULg)