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See detailEncres anciennes: l'encre ferro-gallique
Wymeersch, Noémie; Bouchat, Isabelle; Henry, Lauric et al

in L'analyse chimique, outil des experts (2012, October 11)

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See detailEncres anciennes: utilisation non conventionnelle d'aliments
Bouchat, Isabelle; Wymeersch, Noémie; Bchir, Brahim ULg et al

in Septième symposium du GCNAS: Vendredi 6 décembre, Louvain-La-Neuve (2013, December 06)

De tout temps l’homme utilise des pigments pour peindre. Il y a 27.000 ans déjà, près de Marseille, dans la grotte Cosquer, des fresques furent peintes par des hommes préhistoriques. Il existe deux ... [more ▼]

De tout temps l’homme utilise des pigments pour peindre. Il y a 27.000 ans déjà, près de Marseille, dans la grotte Cosquer, des fresques furent peintes par des hommes préhistoriques. Il existe deux grandes catégories de pigments et colorants: les naturels et les artificiels. La première catégories contient les pigments minéraux tels que les argiles (ocre jaune ou rouge, argile verte ou brune) mais aussi des pierres (lapis lazuli (bleu)) et les pigments organiques d’origine végétale (gaude (jaune)) ou d’origine animale (murex (pourpre). La deuxième catégorie contient les pigments et colorants artificiels issus de réactions chimiques (minium (orange)) ou bien des mi-végétaux, mi-minéraux comme les encres ferro-galliques classés dans les divers. Après avoir servi pendant plusieurs siècles, tous ces pigments ont été remplacés à la fin du XIXe par des colorants synthétiques issus de la pétrochimie, car ces derniers ont l'avantage de la reproductibilité constante des couleurs. Mais la fin programmée du pétrole suscite un regain d'intérêt pour les préparations naturelles. C'est donc très logiquement que notre laboratoire a décidé de s'intéresser au sujet et en particulier aux encres venant du jus de chou rouge et aux encres ferro-grenadiques en collaboration avec l'Abbaye de Villers-la-Ville. [less ▲]

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See detailEncurvada lateral de vigas metalicas sujeitas a acçao do fogo: uma nova proposta de calculo simples complementar ao EC3
Vila Real, P.; Lopes, N.; Simoes da Silva, L. et al

in Lamas; Calado; Ferreira (Eds.) et al Proceedings of the Congresso de Construçao Metallica e Mista (2003)

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See detailEncurvadura Lateral de Vigas Metalicas Sujeitas à Acçao do Fogo - Estudo Numerico e Experimental
Vila Real, Paulo; Piloto, Paulo; Franssen, Jean-Marc ULg et al

in Mecânica Experimental (1999), 4

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See detailEncyclopedia of American Gospel Music - Musicians and soloists biographies
Sacré, Robert ULg

in Mc Neil, W.K. (Ed.) Encyclopedia of American Gospel Musdic (2005)

Biographies d'artistes et de groupes de Gospdel africain-Américain: Robert Anderson, Martha Bass, Blue Jay Singers, Davis Sisters, Gay Sisters, Harmonizing Four, Madame Marie Knight, Meditation Singers ... [more ▼]

Biographies d'artistes et de groupes de Gospdel africain-Américain: Robert Anderson, Martha Bass, Blue Jay Singers, Davis Sisters, Gay Sisters, Harmonizing Four, Madame Marie Knight, Meditation Singers, Original Gospel Harmonettes, Selah Jubilee Singers, Stars of Faith, Swanee Quintet, Albertina Walker, Ernestine B. Washington [less ▲]

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See detailENCYCLOPEDIA OF ASTROBIOLOGY
Gargaud, M.; Amils, R.; Cernichicaro et al

Book published by Springer (2011)

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See detailEncyclopedia of the Blues - Artists biographies
Sacré, Robert ULg

in Komara, Edward (Ed.) Encyclopedia of the Blues (2006)

- Biographies: Arthur Adams, Marcia Ball, Dave Bartholomew, Susan (Susie) Hawthorne, Maxwell Davis, Alex " Easy Baby" Randle, Esquerita ( Eskew Reeder, Jr.), Robert "H-Bomb" Ferguson, Doug Quattlebaum ... [more ▼]

- Biographies: Arthur Adams, Marcia Ball, Dave Bartholomew, Susan (Susie) Hawthorne, Maxwell Davis, Alex " Easy Baby" Randle, Esquerita ( Eskew Reeder, Jr.), Robert "H-Bomb" Ferguson, Doug Quattlebaum, Robert Henry "baby Boy" Warren, Harding Hop Wilson, Early Wright . - Survey of Periodicals dealing with the Blues [less ▲]

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See detailL’encyclopédîle/1 : Du Robinson Crusoé aux 120 journées de Sodome
Durand, Pascal ULg

Article for general public (1995)

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See detailL’encyclopédîle/2 : des Voyages de Gulliver à Paul et Virginie
Durand, Pascal ULg

Article for general public (1995)

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See detailL’Encyclopédisme au XVIIIe siècle. Actes du Colloque organisé par le Groupe d’étude du XVIIIe siècle de l’Université de Liège (Liège, 30-31 octobre 2006)
Tilkin, Françoise ULg

Book published by Droz/Bibliothèque de la Faculté de Philosophie et Lettres de l’Université de Liège (2008)

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See detailThe end of a myth:Arpylorus antiquus Paleozoic dinoflagellate
Le Hérissé, Alain; Masure, Edwige; Javaux, Emmanuelle ULg et al

in PALAIOS (2012), 27

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See detailEnd of life care in the operating room for non-heart-beating donors: organization at the University Hospital of Liege.
JORIS, Jean ULg; KABA, Abdourahmane ULg; LAUWICK, Séverine ULg et al

in Transplantation Proceedings (2011), 43(9), 3441-4

Non-heart-beating (NHB) organ donation has become an alternative source to increase organ supply for transplantation. A NHB donation program was implemented in our institution in 2002. As in many ... [more ▼]

Non-heart-beating (NHB) organ donation has become an alternative source to increase organ supply for transplantation. A NHB donation program was implemented in our institution in 2002. As in many institutions the end of life care of the NHB donor (NHBD) is terminated in the operating room (OR) to reduce warm ischemia time. Herein we have described the organization of end of life care for these patients in our institution, including the problems addressed, the solution proposed, and the remaining issues. Emphasis is given to our protocol elaborated with the different contributors of the chain of the NHB donation program. This protocol specifies the information mandatory in the medical records, the end of life care procedure, the determination of death, and the issue of organ preservation measures before NHBD death. The persisting malaise associated with NHB donation reported by OR nurses is finally documented using an anonymous questionnaire. [less ▲]

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See detailThe end of roaming in the forest causes a loss of timber resources: the paradox of slash-and-burn agriculture
Morin-Rivat, Julie ULg; Fayolle, Adeline ULg; Favier, Charly et al

Conference (2014, February 27)

Tropical forests are not believed as pristine anymore. Their structure and specific composition are induced by past climatic and human disturbances over years. In the African moist forests, the emergent ... [more ▼]

Tropical forests are not believed as pristine anymore. Their structure and specific composition are induced by past climatic and human disturbances over years. In the African moist forests, the emergent trees are mainly light-demanding. These trees are considered to derive from the recent disturbances of the last centuries. Most of them are exploited for their timber. However, several of these tree species are currently suffering from a lack of regeneration that threatens the specific diversity of the forests and the sustainability of timber exploitation. Through dendrometric and radiocarbon analyses we found that the majority of the trees of the Congo Basin are not older than 160 years. This corresponds to about the year 1850 when the Europeans colonized the inner regions of Central Africa. By reassembling people along the road axes, the colonial administration reduced the forest roaming. Former activities such as slash and burn agriculture created large openings in the canopy that allowed light-demanding tree species to establish. Currently we observed that timber logging does not provide openings large enough for the recruitment of these species. We thus anticipate that adjustments in forest management strategies shall be made to preserve the forest resources, for instance by recreating the conditions of slash and burn agriculture. [less ▲]

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See detailEnd-attaching copolymer adsorption: kinetics and effects of chain architecture
Dogan, J. R.; Stamm, Manfred; Toprakcioglu, C. et al

in Macromolecules (1993), 26(20), 5321-5330

In this study we report on the adsorption behavior of end-attaching triblock and diblock copolymers. The triblock copolymers consist of relatively short PEO end blocks and a much longer PS middle block or ... [more ▼]

In this study we report on the adsorption behavior of end-attaching triblock and diblock copolymers. The triblock copolymers consist of relatively short PEO end blocks and a much longer PS middle block or, in one case, of zwitterionic end groups with a PS middle block. The diblock materials consist of a PEO block of fixed length and varying polystyrene lengths. A silicon wafer with an oxide layer is used as the surface, and adsorption takes place from toluene; only the end groups adsorb, leaving the polystyrene block dangling in solution. We find that diblock copolymers which range from symmetric to moderately symmetric obey the scaling law for the surface coverage which was proposed in the theory of Marques and Joanny (i.e., sigma is-proportional-to 1/N(A), where N(A) is the number of segments in the adsorbing block). However, we find that for triblock copolymers of comparable asymmetry the surface coverage scales according to the relationship sigma is-proportional-to 1/beta2, where beta is the ratio of the size of the nonadsorbing block to that of the adsorbing block. This implies that moderately symmetric triblock copolymers behave like highly asymmetric diblock copolymers; the adsorption behavior is dominated by the nonadsorbing block size. Our experiments demonstrate the observation of extremely long-lived nonequilibrium states. On the basis of these observations we propose a simplified version of a recent theory of adsorption which is capable of qualitatively describing much of the experimentally observed phenomena. [less ▲]

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See detailEnd-capping of polystyrene by aliphatic primary amine by derivatization of precursor hydroxyl end group
Fallais, Isabelle; Devaux, Jacques; Jérôme, Robert ULg

in Journal of Polymer Science. Part A, Polymer Chemistry (2000), 38(9), 1618-1629

A new and very efficient route for the synthesis of aliphatic primary amine terminated polystyrene (PS) is reported. In contrast to most known methods, only traditional commercially available reagents are ... [more ▼]

A new and very efficient route for the synthesis of aliphatic primary amine terminated polystyrene (PS) is reported. In contrast to most known methods, only traditional commercially available reagents are used. PS is synthesized by anionic polymerization with a lithium counter ion and the living chains are end-capped by a hydroxyl group upon addition of ethylene oxide followed by protonation. The -hydroxyl end group is tosylated and the tosylate is then reacted with sodium azide. The azide terminal group is finally reduced into primary amine. The different steps of functionalization have been fully characterized by SEC, ToF-SIMS, FTIR, and 1H NMR. The amine content (= 98%) has been determined by acid-base titration with perchloric acid. It clearly shows the efficiency of the synthetic method reported in this article although it is a multistep method. [less ▲]

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See detailEnd-grained wood-polyurethane composites, 1 Synthesis, morphology and characterization
Persenaire, Olivier; Alexandre, Michaël ULg; Degée, Philippe et al

in Macromolecular Materials and Engineering (2004), 289(10), 895-902

In order to improve the dimensional stability of end-grained wood upon environmental humidity variations, a two-step procedure was thoroughly Studied which involved the osmotic impregnation of native ... [more ▼]

In order to improve the dimensional stability of end-grained wood upon environmental humidity variations, a two-step procedure was thoroughly Studied which involved the osmotic impregnation of native poplar wood by PEG, followed by the reactive impregnation with HMDI, leading to polymer chain extension and polyurethane formation. It came out that the efficiency of PEG and/or polyurethane grafting within ligno-cellulosic cell walls was intimately related to parameters such as concentration of the PEG impregnation bath, PEG molar mass, time and temperature of impregnation steps. Based on the different sample characterizations, Soxhlet extraction and density measurements, it came out that adequate experimental conditions are to carry out osmotic impreanation at 20degreesC for 24 h starting from an aqueous solution of PEG([PEG] = 0.5mol(.)L(-1) and (M) over bar (nPEG) = 400 or 1000) and reactive impregnation in bulk with a large excess of HMDI at 20degreesC for 2 h. Combining scanning electron microscopy and mercury porosimetry demonstrated the selective impregnation of cell wall and wood rays which were collapsed in native wood and expanded in wood polyurethane composites. [less ▲]

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