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See detailEasy functionalization of amphiphilic poly(ethylene oxide)-b-poly(ε-caprolactone) copolymer micelles with unprotected sugar: synthesis and recognition by lectins
Freichels, Hélène; Auzély-Velty, Rachel; Lecomte, Philippe ULg et al

in Polymer Chemistry (2012), 3(6), 1436-1145

This paper aims at reporting the end-functionalization of a PEO block of an amphiphilic α-acetal-PEO-b-PCL copolymer. The acetal end-group, which is the fragment of the initiator used in the EO ... [more ▼]

This paper aims at reporting the end-functionalization of a PEO block of an amphiphilic α-acetal-PEO-b-PCL copolymer. The acetal end-group, which is the fragment of the initiator used in the EO polymerization, was first hydrolyzed into an aldehyde that was then reacted with an amine by reductive amination reaction in water. This two-step derivatization was carried out in one pot. In a preliminary study a model amine, i.e. fluorescein amine, was used and the impact of the composition, thus of the Hydrophilic–Lipophilic Balance (HLB) of the amphiphilic copolymer, was studied. The experimental conditions were extended to the coupling of an aminated mannose to the diblock copolymer. The frozen micelles formed by the mannosylated copolymer proved to form complexes with various lectins as shown by Surface Plasmon Resonance (SPR) and Isothermal Titration Calorimetry (ITC). [less ▲]

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See detailEasy Riders & Raging Bulls : New Hollywood et nouvelles contestations
Tomasovic, Dick ULg

Scientific conference (2010, November 29)

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See detailEasy Scapegoats : undocumented immigrants in Europe. Belgina Report
Kagné, Bonaventure; Martiniello, Marco ULg

Report (2000)

Detailed reference viewed: 34 (0 ULg)
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See detailAn Easy Way to Increase the Finite-Sample Efficiency of the Resampled Minimum Volume Ellipsoid Estimator
Croux, Christophe ULg; Haesbroeck, Gentiane ULg

in Computational Statistics & Data Analysis (1997), 25

In a robust analysis, the minimum volume ellipsoid (MVE) estimator is very often used to estimate both multivariate location and scatter. The MVE estimator for the scatter matrix is defined as the ... [more ▼]

In a robust analysis, the minimum volume ellipsoid (MVE) estimator is very often used to estimate both multivariate location and scatter. The MVE estimator for the scatter matrix is defined as the smallest ellipsoid covering half of the observations, while the MVE location estimator is the midpoint of that ellipsoid. The MVE estimators can be computed by minimizing a certain criterion over a high-dimensional space. In practice, one mostly uses algorithms based on minimization of the objective function over a sequence of trial estimates. One of these estimators uses a resampling scheme, and yields the (p + 1)-subset estimator. In this note, we show how this estimator can easily be adapted, yielding a considerable increase of statistical efficiency at finite samples. This gain in precision is also observed when sampling from contaminated distributions, and it becomes larger when the dimension increases. Therefore, we do not need more computation time nor do we lose robustness properties. Moreover, only a few lines have to be added to existing computer programs. The key idea is to average over several trials close to the optimum, instead of just picking out the trial with the lowest value for the objective function. The resulting estimator keeps the equivariance and robustness properties of the original MVE estimator. This idea can also be applied to several other robust estimators, including least-trimmed-squares regression. [less ▲]

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See detailAn Easy, Convenient Cell and Tissue Extraction Protocol for Nuclear Magnetic Resonance Metabolomics.
Matheus, Nicolas ULg; Hansen, Sylvain ULg; Rozet, Eric ULg et al

in Phytochemical analysis : PCA (2014)

INTRODUCTION: As a complement to the classic metabolomics biofluid studies, the visualisation of the metabolites contained in cells or tissues could be a very powerful tool to understand how the local ... [more ▼]

INTRODUCTION: As a complement to the classic metabolomics biofluid studies, the visualisation of the metabolites contained in cells or tissues could be a very powerful tool to understand how the local metabolism and biochemical pathways could be affected by external or internal stimuli or pathologies. Therefore, extraction and/or lysis is necessary to obtain samples adapted for use with the current analytical tools (liquid NMR and MS). These extraction or lysis work-ups are often the most labour-intensive and rate-limiting steps in metabolomics, as they require accuracy and repeatability as well as robustness. Many of the procedures described in the literature appear to be very time-consuming and not easily amenable to automation. OBJECTIVE: To find a fast, simplified procedure that allows release of the metabolites from cells and tissues in a way that is compatible with NMR analysis. METHODS: We assessed the use of sonication to disrupt cell membranes or tissue structures. Both a vibrating probe and an automated bath sonicator were explored. RESULTS: The application of sonication as the disruption procedure led to reproducible NMR spectral data compatible with metabolomics studies. This method requires only a small biological tissue or cell sample, and a rapid, reduced work-up was applied before analysis. The spectral patterns obtained are comparable with previous, well-described extraction protocols. CONCLUSION: The rapidity and the simplicity of this approach could represent a suitable alternative to the other protocols. Additionally, this approach could be favourable for high- throughput applications in intracellular and intratissular metabolite measurements. Copyright (c) 2014 John Wiley & Sons, Ltd. [less ▲]

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See detailAn easy-to-use pipeline for creating connectomes
Ziegler, Erik ULg; Foret, Ariane; Matarazzo, Luca et al

Poster (2011, June)

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See detailEating and Body Representations and practices in adolescence. Preliminary Results.
D'Amore, Salvatore ULg

Conference (2000, February 01)

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See detailEating and Body Representations and Practices in Adolescence. Preliminary Results.
D'Amore, Salvatore ULg

in European Journal of Clinical Nutrition (2000), 54(4), 9

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See detailEating disorders throughout female adolescence.
Domine, F.; Dadoumont, C.; BOURGUIGNON, Jean-Pierre ULg

in Endocrine Development (2012), 22

Eating disorders (EDs) are conditions which are becoming more and more widespread among adolescents and they often lead them to seek the opinion of a professional health caregiver, including gynecologists ... [more ▼]

Eating disorders (EDs) are conditions which are becoming more and more widespread among adolescents and they often lead them to seek the opinion of a professional health caregiver, including gynecologists and pediatricians. EDs, and particularly anorexia nervosa (AN), are usually classified as psychological or psychiatric disorders, but they may have major somatic implications and complications as osteoporosis, nutritional deficiencies, cerebral atrophy, cardiac and metabolic disorders. A key issue in the management is prevention or reduction of both the serious somatic consequences and the important mental health consequences (e.g. depression, psychosocial withdrawal, phobia and suicide), integrating different perspectives (psychological or psychiatric - individual and familial -, genetic, nutritional, pediatric, gynecological). Adolescence is a critical period for the onset of EDs though they may also involve younger children. In this case, the consequences on the development (height, weight, puberty) can also be significant. In this review, we will focus on eating disorders in adolescent girls with an emphasis on AN. We describe variations in ED characteristics and their management depending on age at occurrence. A possible ED should be considered by pediatricians consulted about delayed female growth and puberty as well as gynecologists in patients with primary or secondary amenorrhea or infertility. [less ▲]

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See detailL’eau dans l’univers
Jehin, Emmanuel ULg; Javaux, Emmanuelle ULg; Magain, Pierre ULg et al

Conference given outside the academic context (2013)

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See detailL'eau dans le cadre du Diagnostic territorial de la Wallonie préparatoire à l'actualisation du SDER
Everbecq, Etienne ULg; Blockx, Caroline ULg; Grard, Aline ULg et al

Report (2011)

Dans le cadre des travaux d'actualisation du Schéma de Développement de l'Espace Régional (SDER), la Conférence Permanente de Développement Territorial (CPDT) a mené, d’octobre 2010 à octobre 2011, à la ... [more ▼]

Dans le cadre des travaux d'actualisation du Schéma de Développement de l'Espace Régional (SDER), la Conférence Permanente de Développement Territorial (CPDT) a mené, d’octobre 2010 à octobre 2011, à la demande du Gouvernement Wallon, les travaux concernant le diagnostic. Ces travaux ont mené à la construction, pour chacune des 15 thématiques abordées, d'indicateurs permettant d'évaluer la situation passée, existante et future. Cette note de recherche présente les réflexions menées sur le choix, la conception et le calcul des 3 indicateurs "eau" développés : (i) un indicateur sur la consommation d'eau, (ii) un indicateur sur l'épuration des eaux usées et (iii) un indicateur sur la qualité des eaux de surface [less ▲]

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See detailL’eau dans tous ses état : enjeux et difficultés de la gestion des eaux souterraines
Dassargues, Alain ULg

Scientific conference (2005, January 20)

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See detailL'eau déshydrate : l'antinomie de la xérose.
Xhauflaire, Emmanuelle ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Dermatologie Actualité (2006), 97

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See detailEau et architecture moderne. L'Exposition internationale de Liège en 1939
Charlier, Sébastien ULg

in Raxhon, Philippe (Ed.) Liège à la conquête de l'eau. Des origines au centenaire de la CILE (2012)

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See detailEau et changement climatique. Tendances et perceptions en Afrique de l’Ouest
Ozer, Pierre ULg; Perrin, Dominique ULg

in Ballouche, Aziz; Taïbi, Nuscia Aude (Eds.) Eau, milieux et aménagement. Une recherche au service des territoires (2014)

L’Afrique de l’Ouest, plus spécifiquement sa frange semi-aride que constitue le Sahel, a connu, au cours de ces dernières décennies, deux crises majeures de sécheresse presque contiguës dans les années ... [more ▼]

L’Afrique de l’Ouest, plus spécifiquement sa frange semi-aride que constitue le Sahel, a connu, au cours de ces dernières décennies, deux crises majeures de sécheresse presque contiguës dans les années 1970 et 1980. Cependant, depuis les années 1990, les tendances pluviométriques montrent globalement un retour vers des moyennes antérieures aux années 1970. Toutefois, cette amélioration des totaux pluviométriques annuels semble être partiellement le fait d’une intensité des pluies plus importante et il appert que la longueur de la saison des pluies évolue peu par rapport aux décennies de sécheresse. Par ailleurs, depuis la moitié du XXe siècle, la population sahélienne a plus que quadruplé et les prévisions pour 2050 avancent un facteur de croissance de l’ordre de dix. Les taux de croissance urbaine sont encore plus impressionnants et entraînent chaque jour d’importants bouleversements environnementaux. Une telle pression anthropique sur des ressources fragiles engendre un déboisement incontrôlé pour satisfaire les besoins en énergie des populations, la demande en bois d’œuvre et l’expansion agricole. En outre, le cheptel toujours plus nombreux et devant se satisfaire de parcours continuellement réduits engendre un surpâturage. Le tout provoque donc une dégradation de la couverture végétale du sol ainsi qu’une diminution globale des rendements des cultures. Dans le même temps, les études réalisées auprès de communautés locales et de décideurs en Afrique de l’Ouest montrent que la pauvre santé du cheptel, la réduction des rendements céréaliers, l’augmentation de la fréquence des inondations dans certaines villes et la dégradation des moyens d’existence sont le plus souvent attribués au changement climatique. Cet article fait le point sur les connaissances actuelles des variations pluviométriques passées et à venir ; ainsi que sur les perceptions des impacts du « changement climatique » en Afrique de l’Ouest. Ainsi, les famines récurrentes au Niger en 2005, 2009, 2011 et 2012 sont-elles dues au réchauffement climatique ? Les inondations, le plus souvent en zone urbaine, résultent-elles spécifiquement d’une augmentation des événements pluviométriques extrêmes ? Nous concluons sur une analyse des politiques nationales et internationales menées actuellement en Afrique de l’Ouest en termes d’adaptation aux impacts du changement climatique. [less ▲]

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See detailL’eau, la matière et l’homme
Marchal, Jean ULg

Book published by Editions LHCN Laboratoires des Constructions Hydrauliques et des Constructions Navales de l'Université de Liège - ouvrage en hommage à Mr. N.M. DEHOUSSE (1995)

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See detailL'eau, un enjeu majeur pour le XXIe siècle
Merenne-Schoumaker, Bernadette ULg

in GEO (2011), 70(2-2011), 7-46

Le travail traite de huit points différents : concepts et notions de base, accroissement des besoins et diversification des usages, disponibilités et accès, prix et distribution et multiplication des ... [more ▼]

Le travail traite de huit points différents : concepts et notions de base, accroissement des besoins et diversification des usages, disponibilités et accès, prix et distribution et multiplication des grands aménagements, tensions et conflits, gestion durable de l'eau, situation en Wallonie et inondations. [less ▲]

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See detailLes eaux minérales et thermales de Chaudfontaine
Ruthy, Ingrid ULg; Cornet, Jean-Louis

in Dassargues, Alain; Walraevens, Kristine (Eds.) Watervoerende lagen & grondwater in België - Aquifères & eaux souterraines en Belgique (2014)

Detailed reference viewed: 14 (5 ULg)