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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 detailLignosulfonates: Novel promoting additives for plant tissue cultures
Kevers, Claire ULg; Soteras, G.; Baccou, J. C. et al

in In Vitro Cellular and Developmental Biology - Plant (1999), 35(5), 413-416

Lignosulfonates (LIGNs) are low-cost by-products from the paper industry and are already commercialized as fertilizers. Because earlier laboratory and glasshouse assays had shown a beneficial effect of ... [more ▼]

Lignosulfonates (LIGNs) are low-cost by-products from the paper industry and are already commercialized as fertilizers. Because earlier laboratory and glasshouse assays had shown a beneficial effect of LIGNs on rooting and general plant vigor, their incorporation in several plant tissue culture types was examined here. The present assays indicated that well-chosen concentrations of LIGNs, whether they were chelated with Ca or Fe, stimulated growth of a normal and an habituated sugarbeet callus, improved multiplication rate and vigor of a shoot-proliferating poplar cluster, and increased the rooting percentage of holly, ginseng, and poplar shoots. Complementing the exogenous rooting auxin with LIGNs enhanced the increases of endogenous levels of indoleacetic acid and its aspartate conjugate in the basal parts of poplar shoots at the rooting inductive phase. Although LIGNs exerted some effects in the absence of the growth regulators, they could not replace them. Their possible mode of action is discussed. [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)

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See detailLike a bridge over troubled water – opening pathways for integrating social sciences and humanities into nuclear research
Turcanu, Catrinel; Schröder, Jantine; Meskens, Gaston et al

in Journal of Environmental Radioactivity (2016), 153

Research on nuclear technologies has been largely driven by a detachment of the 'technical content' from the 'social context'. However, social studies of science and technology - also for the nuclear ... [more ▼]

Research on nuclear technologies has been largely driven by a detachment of the 'technical content' from the 'social context'. However, social studies of science and technology - also for the nuclear domain – emphasize that 'the social' and 'the technical' dimensions of technology development are inter-related and co-produced. In an effort to create links between nuclear research and innovation and society in mutually beneficial ways, the Belgian Nuclear Research Centre started fifteen years ago a ‘Programme of Integration of Social Aspects into nuclear research’ (PISA). In line with broader science-policy agendas (responsible research and innovation and technology assessment), this paper argues that the importance of such programmes is threefold. First, their multi-disciplinary basis and participatory character contribute to a better understanding of the interactions between science, technology and society, in general, and the complexity of nuclear technology assessment in particular. Second, their functioning as (self )critical policy supportive research with outreach to society is an essential prerequisite for policies aiming at generating societal trust in the context of controversial issues related to nuclear technologies and exposure to ionising radiation. Third, such programmes create an enriching dynamic in the organisation itself, stimulating collective learning and transdisciplinarity. The paper illustrates with concrete examples these claims and concludes by discussing some key challenges that researchers face while engaging in work of this kind. [less ▲]

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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

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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 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 ▲]

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See detailLILAS, an integrated laboratory information system
Albert, Adelin ULg; Chapelle, Jean-Paul ULg; Ongaro, C. et al

Poster (1991, May)

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See detailLilia florent : l’imaginaire politique et social à la cour de France durant les premières Guerres d’Italie (1494-1525)
Dumont, Jonathan ULg

Doctoral thesis (2010)

Ces dernières années, l’historiographie des premières Guerres d’Italie (1494-1525) s’est considérablement enrichie notamment grâce aux études de D. Le Fur, N. Hochner, A.-M. Lecoq et R. W. Scheller ... [more ▼]

Ces dernières années, l’historiographie des premières Guerres d’Italie (1494-1525) s’est considérablement enrichie notamment grâce aux études de D. Le Fur, N. Hochner, A.-M. Lecoq et R. W. Scheller. Croisant délibérément des sources variées (littéraires, politiques et iconographiques) ainsi que les méthodes (celle de l’historien des textes et celle de l’historien d’art), leurs travaux se sont attachés à définir les différents aspects du pouvoir royal et la manière dont celui-ci se met en scène tout spécialement sous les règnes de Charles VIII, de Louis XII et de François Ier. Force est donc de constater que la figure du roi de France domine l’historiographie récente des premières Guerres d’Italie. Pourtant, à chaque fois que les souverains des fleurs de lys sont mis en scène, ils n’occupent pas seuls le discours politique. D’autres personnages, la France et les Français, apparaissent à côté d’eux. Le premier est dépeint, selon une tradition établie, comme un espace bénéficiant de qualités exceptionnelles. Lesdites qualités conditionnent la nature du deuxième personnage – les Français –, lequel s’intègre dès lors à un portrait de la nation. Durant les Guerres d’Italie, ce discours sur la France et les Français ne sert pas uniquement à décrire le royaume lui-même. Il permet avant tout aux artisans de la propagande royale d’élaborer une pensée légitimant la conquête de l’Italie et permettant d’y imposer une nouvelle culture politique et sociale d’inspiration française. Cet amalgame d’images à propos de l’Italie française ou Franco-Italia traverse l’ensemble de la période, croisant parfois la figure royale, mais s’en éloignant aussi très souvent. L’étude d’une telle idéologie révèle enfin un intérêt supplémentaire. Au cours des premières décennies du XVIe siècle, la France connaît un véritable bouleversement de son modèle d’organisation sociale traditionnel. Nous voulons parler des trois ordres du féodalisme (oratores, bellatores et laboratores). Certes, dans la réalité quotidienne, le système ternaire ne reflète plus, depuis des siècles, la complexité des relations politiques et sociales. Par contre, la remise en cause de ce modèle au sein de la pensée politique curiale, en somme dans la culture de l’élite, est une donnée relativement nouvelle en ce début de XVIe siècle. Ainsi, le discours sur l’Italie française sert de champ d’expérimentation aux théoriciens du politique, aux polémistes ainsi qu’aux chroniqueurs et même aux poètes, leur permettant de redéfinir les contours d’un schéma ternaire qui, dans sa forme traditionnelle, leur apparaît désuet. On l’aura compris : notre thèse s’oriente donc vers l’étude, non d’un seul mode de pensée, mais plutôt d’une pluralité de concepts et d’opinions ayant comme dénominateur commun la redéfinition des contours de l’Italie et également de la France. Il s’agira de comprendre la manière dont les auteurs de la cour de France regardent la Péninsule et ses habitants et comment, de cette expérience de l’altérité, ils en arrivent à pratiquer un retour sur eux-mêmes et à relire leur propre mode d’organisation sociale, autrement dit, les cadres théoriques de leur existence. Cette histoire des lys qui s’évertuent à fleurir dans les champs d’une Italie pourtant bien décidée à les faucher sera l’occasion d’entrevoir sous un angle neuf cette période de bouleversements et d’inquiétudes que sont les premières Guerres d’Italie. [less ▲]

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See detailLilia florent. L’imaginaire politique et social à la cour de France durant les premières Guerres d’Italie (1494–1525)
Dumont, Jonathan ULg

Book published by Honoré Champion (2013)

During the first Italian Wars (1494–1525), at the court of France, an ideology of assimilation of Italy by France is developing: Franco-Italia. Historiographers and poets show the Peninsula as a new ... [more ▼]

During the first Italian Wars (1494–1525), at the court of France, an ideology of assimilation of Italy by France is developing: Franco-Italia. Historiographers and poets show the Peninsula as a new France populated by Italians Frenchified. But this thought reveals much more than an attempt absorption of Italy by France. It highlights a real disruption of traditional social structures. At the beginning of the sixteenth century, there is a critique of the social order at the heart of the closed circles of power. This work is well under the sign of acculturation - that of Italy and Italians - and reflection of identity - Frenchising Italy, the French redefine their own socio-political structures. It enlights the very nature of political thought at the beginning of the Renaissance, thought full of contradictions and doubts, in a period full of turmoil and worry. [less ▲]

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See detailA Lilliputian lignophyte from the Lower Devonian?
Gerrienne, Philippe ULg; Strullu-Derrien, C.; Steemans, Philippe ULg

Conference (2008, November 27)

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See detailLima : un sommet sans enjeux
Santander, Sébastian ULg

Article for general public (2008)

L'UE et l'Amérique latine tiennent tous les deux ans des sommets de chef d'Etat et de gouvernement. Ces derniers ont pour objectif de faire avancer les relations économiques, commerciales, politiques ... [more ▼]

L'UE et l'Amérique latine tiennent tous les deux ans des sommets de chef d'Etat et de gouvernement. Ces derniers ont pour objectif de faire avancer les relations économiques, commerciales, politiques, culturelles et de coopération. Toutefois, le sommet de Lima a démontré l'écart entre les intentions de créer un "partenariat stratégique" et la réalité qui est traversée par des conflits aussi bien entre l'UE et l'AL qu'au sein même des relations intralatinoaméricaines. Cette situation bloque les ambitions de l'agenda UE/AL. [less ▲]

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See detailLimb observations of the ultraviolet nitric oxide nightglow with SPICAV on board Venus Express
Gérard, Jean-Claude ULg; Cox, Cédric ULg; Saglam, Adem ULg et al

in Journal of Geophysical Research. Planets (2008), 113

Limb observations of the spectrum of nightglow emission in the delta (190-240 nm) and gamma (225-270 nm) bands of nitric oxide have been made with the Spectroscopy for Investigation of Characteristics of ... [more ▼]

Limb observations of the spectrum of nightglow emission in the delta (190-240 nm) and gamma (225-270 nm) bands of nitric oxide have been made with the Spectroscopy for Investigation of Characteristics of the Atmosphere of Venus (SPICAV) ultraviolet spectrometer on board Venus Express. These emissions arise from radiative recombination between O([SUP]3[/SUP]P) and N([SUP]4[/SUP]S) atoms that are produced on the dayside and recombine to form excited NO molecules on the nightside. No other emission feature has been identified. The mean altitude of the emission layer is located at 113 km, but it varies between 95 and 132 km. The mean brightness of the total NO emission at the limb is 32 kR, but it is highly variable with limb intensities as large as 440 kR observed at low latitude and values below 5 kR seen at northern midlatitudes. No systematic dependence of the brightness with latitude is observed, but the mean altitude of the emission maximum statistically drops with increasing latitude between 6° and 72°N. Typical observed limb profiles are compared with simulations based on a one-dimensional chemical-diffusive atmospheric model. From model fits to observed profiles, we find that the downward flux of N atoms at 130 km typically varies between 1 × 10[SUP]8[/SUP] to 4 × 10[SUP]9[/SUP] atoms cm[SUP]-2[/SUP] s[SUP]-1[/SUP]. Comparisons of observed airglow topside scale heights with modeled profiles smoothed by the instrumental field of view indicate that the observations are compatible with a downward flow of O and N atoms by molecular and turbulent transport above the peak of emission. The K coefficient deduced from comparisons to limb profiles is less than that determined from the observations made with the Pioneer Venus UV spectrometer at low latitude during periods of high solar activity. [less ▲]

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See detailLimbic hyperconnectivity in the vegetative state
Di Perri, C; Bastianello, S; Bartsch, AJ et al

in Neurology (2013), Vol 81

Objective: To investigate functional connectivity between the default mode network (DMN) and other networks in disorders of consciousness. Methods: We analyzedMRI data from 11 patients in a vegetative ... [more ▼]

Objective: To investigate functional connectivity between the default mode network (DMN) and other networks in disorders of consciousness. Methods: We analyzedMRI data from 11 patients in a vegetative state and 7 patients in a minimally conscious state along with age- And sex-matched healthy control subjects. MRI data analysis included nonlinear spatial normalization to compensate for disease-related anatomical distortions. We studied brain connectivity data from resting-state MRI temporal series, combining noninferential (independent component analysis) and inferential (seed-based general linear model) methods. Results: In DMN hypoconnectivity conditions, a patient's DMN functional connectivity shifts and paradoxically increases in limbic structures, including the orbitofrontal cortex, insula, hypothalamus, and the ventral tegmental area. Conclusions: Concurrently with DMN hypoconnectivity, we report limbic hyperconnectivity in patients in vegetative and minimally conscious states. This hyperconnectivity may reflect the persistent engagement of residual neural activity in self-reinforcing neural loops, which, in turn, could disrupt normal patterns of connectivity. [less ▲]

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See detailLimestone fillers cement-based composites: effects of blast furnace slags on fresh and hardened properties
Courard, Luc ULg; Michel, Frédéric ULg

in Construction and Building Materials (2014), 51

Limestone filler is a raw material that is already used in several applications like paints, bricks, bituminous mixtures…etc. Moreover, and particularly in Belgium, classical additions for concrete like ... [more ▼]

Limestone filler is a raw material that is already used in several applications like paints, bricks, bituminous mixtures…etc. Moreover, and particularly in Belgium, classical additions for concrete like fly ashes and granulated blast furnace slags are becoming rare; there is a need for new additions that could have a positive effect on the properties of the fresh and hardened cementitous composites. Substitution of limestone filler in Portland cement and Granulated blast furnace slag cement has been realized between 15 and 27 % in mass. In addition to the characterization of the powder itself – specific mass, specific surface and laser granulometry – the problem of the water demand has been analysed: it seems that it remains constant with the substitution rate. Electric conductivity has also been performed in order to study the evolution of the “dormant” period. Tests on hardened mortars were performed with regard to mechanical properties and evolution of the porosity. Test results indicate that the porosity seems to be finer in the case of granulated blast furnace slags cements, partially due to a very low diameter of the slags particles. Oxygen permeability doesn’t seem to be influenced by the filler while capillary absorption increases with substitution rate. Finally, carbonation rate, sulphate resistance and chloride penetration show quite interesting behaviours, leading to the conclusion that limestone fillers maybe a good substitution material. [less ▲]

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