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See detailA Comparison of the Acidity Levels in Room-Temperature Ionic Liquids
Robert, Thierry ULg; Magna, Lionel; Olivier-Bourbigou, Hélène et al

in Journal of the Electrochemical Society (2009), 156(9), 115

The Broensted acidity level was evaluated for several ionic liqs. ([BMIm][BF4], [BMIm][PF6], [BMIm][SbF6], [BMIm][OTf], [BMIm][NTf2], [HNET3][NTf2], and [HBIm][NTf2]) to which a strong acid, such as HNTf2 ... [more ▼]

The Broensted acidity level was evaluated for several ionic liqs. ([BMIm][BF4], [BMIm][PF6], [BMIm][SbF6], [BMIm][OTf], [BMIm][NTf2], [HNET3][NTf2], and [HBIm][NTf2]) to which a strong acid, such as HNTf2 [NTf2=N(CF3SO2)2] and HOTf (OTf=CF3SO3), has been added. The main purpose is to tentatively measure the influence on the resulting acidity of (i) the solvent anion or cation structure and (ii) the added acid nature. The evaluation method is based on the detn. of the Hammett acidity functions H0 using UV/visible spectroscopy. The acidity of protons is mainly detd. by their solvation state, and consequently, the properties of protons depend on both the nature of the solvent and the nature and concn. of the acid. In practice, for the investigated ionic liqs., the cation as well as the added acid nature does not play a dominant role, whereas changing the anion nature may lead to very different acidities. Indeed, for a similar content of added acid, the measured acidity levels are in the order PF6- > BF4- > NTf2- > OTf-. The problems of the influence of impurities on the final acidity and of the dissocg. character of the ionic liq. are addressed. [less ▲]

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See detailInfluence of drying temperature on the wet-milling performance and the proteins solubility indexes of corn kernels
Malumba Kamba, Paul ULg; Janas, Sébastien ULg; Masimango, Thaddée et al

in Journal of Food Engineering (2009), 95

The effects of air drying temperature on the wet-milling performance and the proteins solubility indexes were investigated for corn kernels dried between 54°C and 130°C. It was observed that when the ... [more ▼]

The effects of air drying temperature on the wet-milling performance and the proteins solubility indexes were investigated for corn kernels dried between 54°C and 130°C. It was observed that when the drying temperature increases, the starch yield drops significantly. The gluten recovered increased abruptly for drying temperatures up to 80 C. The albumin, globulin and zein solubility indexes decreased continuously when corn drying temperatures increased. According to the temperatures used, the starch yield, the gluten recovered and the salt-soluble proteins solubility indexes were adjusted satisfactorily by using a two asymptotic logistic model. This model has the advantage of supplying information on the dynamic of the variation of described parameters. The solubility index of total salt-soluble proteins was shown to be a suitable indicator of the severity of the drying treatment in regard to the corn wet-milling performance. [less ▲]

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See detailRéadaptation cognitive d'activités de vie quotidienne dans la maladie d'Alzheimer
Wojtasik, Vinciane ULg; Lekeu, Françoise ULg; Quittre, Anne ULg et al

in Gérontologie et Société : Cahiers de la Fondation Nationale de Gérontologie (2009), 130

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See detailQuel avenir pour les essais de prevention cardiovasculaire?
Scheen, André ULg

in Revue Médicale Suisse (2009), 5(214), 1635-6

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See detailGenetic variability of test-day stearoyl coenzyme-A desaturase 9 activity
Arnould, Valérie ULg; Gengler, Nicolas ULg; Soyeurt, Hélène ULg

in Journal of Dairy Science (2009), 92(E-suppl.1), 353-354

Milk fatty acid (FA) profile is far from the optimal fat composition in regards to human health. Different natural sources of variation such as feeding or genetics could be used to modify the contents of ... [more ▼]

Milk fatty acid (FA) profile is far from the optimal fat composition in regards to human health. Different natural sources of variation such as feeding or genetics could be used to modify the contents of unsaturated fatty acids. The impact of feeding is well described; however, genetics effects on the milk FA composition are not well studied. Increasing the unsaturated fatty acids contents of bovine milk could have the potential to raise the nutritive and therapeutic values of dairy products. The stearoyl Coenzyme-A desaturase 9 (delta-9) gene was identified as a potential functional candidate gene affecting milk fat composition in dairy cattle. The objective of this research was to study the genetic variability on this enzyme activity across lactations. A total of 199,977 test-day records were obtained from 29,603 Holstein cows in first lactation, 154,267 records from 23,453 Holstein cows in second lactation, and 173,244 records from 75,887 Holstein cows in third and later lactations. The used model was a multiple-trait random regressions test-day model. Fixed effects were: herd × date of test, and class of age. Random effects were: herd × year of calving, permanent environmental, additive genetic, and residual effects. The studied traits were milk yield, protein content, percentage of fat, monounsaturated fatty acids estimated by mid-infrared spectrometry, and the ratios reflecting the delta-9 activity. Obtained heritability estimates of delta-9 as well as the genetic and phenotypic correlations varied across lactations. These results suggest potential improvements of milk fat composition based on delta-9 activity using animal selection and appropriate management practices. [less ▲]

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See detailPreliminary studies of development of oral pharmaceutical dosage forms contained extracts of Artemisia annua cultivated in Benin
Zime Diawara, Hermine; Gbaguidi, Fernand; Gbenou, Joachim et al

in Proceedings of 2nd PharmSci Fair (2009)

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See detailModelling earthing systems and cables with moment methods
Jacqmaer, P.; Driesen, J.; Geuzaine, Christophe ULg

in International Journal for Computation and Mathematics in Electrical and Electronic Engineering (2009), 28(4), 989--1004

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See detailInhibition of the Jagged-1/Notch pathway increases the hematopoiesis-supportive activity of mesenchymal stem cells
Briquet, Alexandra ULg; Dolhet, Marie; Beguin, Yves ULg et al

in Experimental Hematology (2009), 37(9), 77

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See detailFarming systems in the sandy area of the Thua Thien Hue Province, Central Vietnam, survey of socio-economic situation and constraints identified by farmers
Pham Khanh, Tu; Hoang Thi Thai, Hoa; Hoang Nghia, Duyet et al

in Improving food crop productivity in the coastal sandy area of the Thua Thien Hue Province Central Vietnam : Vietnam-Belgium interuniversity project 2004-2009 (2009)

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See detailRadicalités, identités, patries. Hommage au Professeur Francis Balace
Colignon, Alain; Lanneau, Catherine ULg; Raxhon, Philippe ULg

Book published by Editions de l'ULg (2009)

Offert au Professeur Francis Balace, titulaire de la chaire d’histoire contemporaine à l’Université de Liège, à l’occasion de sa retraite, ce volume rassemble la bibliographie scientifique de l’historien ... [more ▼]

Offert au Professeur Francis Balace, titulaire de la chaire d’histoire contemporaine à l’Université de Liège, à l’occasion de sa retraite, ce volume rassemble la bibliographie scientifique de l’historien et réunit vingt-trois contributions d’auteurs belges et français qui témoignent à la fois de leurs propres méthodes et champs de recherche et des sujets de prédilection du destinataire. Les textes s’articulent autour de trois grands thèmes. Le premier volet envisage les concepts de radicalité(s) et d’identité(s) tout en s’interrogeant sur les exigences du métier d’historien. Quant aux deuxième et troisième volets, ils explorent la notion de patrie(s) sous deux angles particuliers : les guerres et l’histoire militaire, d’une part, et, de l’autre, les questions diplomatiques et dynastiques. [less ▲]

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See detailLes sartans, une arme de choix dans le traitement de l'hypertension artérielle (6)
Krzesinski, Jean-Marie ULg

in Journal de Cardiologie [= JDC] = Tijdschrift voor Cardiologie [= TVC] (2009), 319

Le Pr Jean-Marie Krzesinski (Ulg) souligne que la situation en matière d'hypertension artérielle dans notre pays ne s'est pas tellement améliorée ces dernières années.

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See detailCrucial role of reversible phosphorylation in the mechanisms governing the biological functions of class IIa Histone Deacetylases
Martin, Maud ULg

Doctoral thesis (2009)

Regulation of class IIa histone deacetylases (HDACs) phosphorylation is crucial because it provides the opportunity to control important developmental processes associated with these key enzymes. Indeed ... [more ▼]

Regulation of class IIa histone deacetylases (HDACs) phosphorylation is crucial because it provides the opportunity to control important developmental processes associated with these key enzymes. Indeed, the transcriptional repressor activity of class IIa HDAC is controlled via their phosphorylation-dependent nucleo-cytoplasmic shuttling. While a lot of efforts have been directed towards the identification of the inactivating kinases that phosphorylate class IIa HDACs, the identity of the antagonist phosphatase remained an open question. During this work, we found that protein phosphatase 2A (PP2A) is responsible for dephosphorylating the class IIa HDACs member HDAC7, thereby regulating its subcellular localization and repressor activity. In order to validate our model, functional consequences of these findings was illustrated during the two main biological processes involving HDAC7, i.e. T-cells apoptosis during negative selection and endothelial cells angiogenic activities during vascular network formation. Cellular PP2A represents a large population of trimeric holoenzymes containing a variable regulatory subunit, whose identity has a crucial role in determining the specificity of PP2A catalytic activity. In an effort to characterize the regulation of HDAC7 dephopshorylation, we identified the relevant PP2A holoenzyme regulating HDAC7 function during vasculogenesis and we found that, among diverse regulatory subunit isoforms, PP2A-Bα uniquely regulates endothelial cell angiogenic properties. PP2A-Bα silencing using small interfering RNAs results in a significant inhibition of endothelial cell tube formation and migration. These results establish PP2A, and more precisely the Bα containg PP2A holoenzyme, as an essential element in the regulation of the class IIa HDACs HDAC7 and unravel a first developmental function for the PP2A regulatory subunit Bα in the genesis of blood vessels. [less ▲]

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See detailLes codes correcteurs
Rigo, Michel ULg

Learning material (2009)

Qu'on le veuille ou non, nous vivons dans un monde où les informations et les moyens de communication sont omniprésents. Les exemples où se mêlent informatique et télécommunications sont nombreux. Que ce ... [more ▼]

Qu'on le veuille ou non, nous vivons dans un monde où les informations et les moyens de communication sont omniprésents. Les exemples où se mêlent informatique et télécommunications sont nombreux. Que ce soit l'Internet, la musique achetée en ligne ou gravée sur CD, les baladeurs de type iPod et autres appareils portables, les supports mémoire de tout type, la photographie numérique, la présence d'ordinateurs de bord sophistiqués dans nos voitures, etc. Sans code correcteur, le CD (implémentant un code correcteur de type Reed-Solomon) et de nombreux autres produits n'auraient probablement jamais connu le succès ! [less ▲]

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See detailA short series of antidiabetic sulfonylureas exhibit multiple ligand PPARgamma-binding patterns
Arrault, Alban; Rocchi, Stéphane; Picard, Frédéric et al

in Biomedicine & Pharmacotherapy (2009), 63

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