Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailGenetic parameters for Tunisian Holsteins using a test-day random regression model.
Hammami, Hedi ULg; Rekik, Boulbaba; Soyeurt, Hélène ULg et al

in Journal of Dairy Science (2008), 91(5), 2118-26

Genetic parameters of milk, fat, and protein yields were estimated in the first 3 lactations for registered Tunisian Holsteins. Data included 140,187; 97,404; and 62,221 test-day production records ... [more ▼]

Genetic parameters of milk, fat, and protein yields were estimated in the first 3 lactations for registered Tunisian Holsteins. Data included 140,187; 97,404; and 62,221 test-day production records collected on 22,538; 15,257; and 9,722 first-, second-, and third-parity cows, respectively. Records were of cows calving from 1992 to 2004 in 96 herds. (Co)variance components were estimated by Bayesian methods and a 3-trait-3-lactation random regression model. Gibbs sampling was used to obtain posterior distributions. The model included herd x test date, age x season of calving x stage of lactation [classes of 25 days in milk (DIM)], production sector x stage of lactation (classes of 5 DIM) as fixed effects, and random regression coefficients for additive genetic, permanent environmental, and herd-year of calving effects, which were defined as modified constant, linear, and quadratic Legendre coefficients. Heritability estimates for 305-d milk, fat and protein yields were moderate (0.12 to 0.18) and in the same range of parameters estimated in management systems with low to medium production levels. Heritabilities of test-day milk and protein yields for selected DIM were higher in the middle than at the beginning or the end of lactation. Inversely, heritabilities of fat yield were high at the peripheries of lactation. Genetic correlations among 305-d yield traits ranged from 0.50 to 0.86. The largest genetic correlation was observed between the first and second lactation, potentially due to the limited expression of genetic potential of superior cows in later lactations. Results suggested a lack of adaptation under the local management and climatic conditions. Results should be useful to implement a BLUP evaluation for the Tunisian cow population; however, results also indicated that further research focused on data quality might be needed. [less ▲]

Detailed reference viewed: 95 (6 ULg)
Full Text
See detailComplications neurologiques des anesthésies locorégionales
KURTH, Isabelle ULg; LIBBRECHT, Dominique ULg; WANG, François-Charles ULg

in Péréon, Yann (Ed.) ENMG 2008 (2008)

Detailed reference viewed: 38 (1 ULg)
Full Text
See detailEkonomia społeczna: ogólnoświatowy trzeci sektor
Defourny, Jacques ULg; Develtere, Patrick

in Wygnański, Jan Jakub (Ed.) Antologia kluczowych tekstów Przedsiębiorstwo społeczne (2008)

Detailed reference viewed: 38 (0 ULg)
Full Text
Peer Reviewed
See detailSpontaneous R-parity violation: Lightest neutralino decays and neutrino mixing angles at future colliders
Hirsch, M.; Vicente, Avelino ULg; Porod, W.

in Physical Review. D, Particles, Fields, Gravitation, and Cosmology (2008), 77

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailQuark model analysis of the Sivers function
Courtoy, Aurore ULg; Fratini, F.; Scopetta, S. et al

in Physical Review. D, Particles, Fields, Gravitation, and Cosmology (2008), 78(3),

We develop a formalism to evaluate the Sivers function. The approach is well suited for calculations which use constituent quark models to describe the structure of the nucleon. A nonrelativistic ... [more ▼]

We develop a formalism to evaluate the Sivers function. The approach is well suited for calculations which use constituent quark models to describe the structure of the nucleon. A nonrelativistic reduction of the scheme is performed and applied to the Isgur-Karl model of hadron structure. The results obtained are consistent with a sizable Sivers effect and the signs for the u and d flavor contributions turn out to be opposite. This pattern is in agreement with the one found analyzing, in the same model, the impact parameter dependent generalized parton distributions. The Burkardt sum rule turns out to be fulfilled to a large extent. We estimate the QCD evolution of our results from the momentum scale of the model to the experimental one and obtain reasonable agreement with the available data. © 2008 The American Physical Society. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailOlive mill wastewater valorization : use by non-conventional yeasts.
Gonçalves, C.; Lopes, M.; Aguedo, Mario ULg et al

in Nzihou, Ange; Lyberatos, Gerasimos (Eds.) Proceedings of the 2nd International Conference on Engineering for Waste Valorisation (2008)

The ability of the strains Yarrowia lipolytica and Candida rugosa to grow on Olive Mill Wastewater (OMW) based medium and to produce high-value compounds from OMW (such as enzymes), while degrading this ... [more ▼]

The ability of the strains Yarrowia lipolytica and Candida rugosa to grow on Olive Mill Wastewater (OMW) based medium and to produce high-value compounds from OMW (such as enzymes), while degrading this waste, was tested. Factors affecting cellular growth and OMW degradation were also studied, such as OMW composition, dilution and supplementation. OMW collected from 3-phase olive mill of the north region of Portugal were used and characterized chemical and biochemically. OMW with COD ranging from 100 g·L-1 to 200 g·L-1 were supplemented with yeast extract and ammonium chloride proportionally to its organic composition. Preliminary studies of OMW consumption were carried out in batch cultures of Y. lipolytica W29 and C. rugosa PYCC 3238. The strains were able to grow in the OMW used without dilution, to consume almost all of the sugars present in the media and to significantly reduce COD. Y. lipolytica W29 was less affected by operating conditions changes such as, stirring rate variation and OMW medium supplementation. [less ▲]

Detailed reference viewed: 28 (1 ULg)
Full Text
See detailPermian
Mc Cann, T.; Kiersnowski, H.; Krainer, K. et al

in Mc Cann, Tom (Ed.) The geology of Central Europe: Precambrian and Palaeozoic (2008)

Detailed reference viewed: 31 (0 ULg)
Full Text
See detailVozobnovlenie arkeologicheckikh rabot na mnogosloïnoï stoyanke Kulbulak v 2007 g.
Derevianko, A.P.; Islamov, U.I.; Kolobova, K.A. et al

in IMKU (2008), 36

Detailed reference viewed: 18 (0 ULg)
Full Text
Peer Reviewed
See detailQue mesure la neuro-imagerie fonctionnelle: IRMf, TEP & MEG?
Gosseries, Olivia ULg; Demertzi, Athina ULg; Noirhomme, Quentin ULg et al

in Revue Médicale de Liège (2008), 63(5-6), 231-7

Functional cerebral imaging techniques allow the in vivo study of human cognitive and sensorimotor functions in physiological or pathological conditions. In this paper, we review the advantages and ... [more ▼]

Functional cerebral imaging techniques allow the in vivo study of human cognitive and sensorimotor functions in physiological or pathological conditions. In this paper, we review the advantages and limitations of functional magnetic resonance imaging (fMRI), positron emission tomography (PET) and magnetoencephalography (MEG). fMRI and PET measure haemodynamic changes induced by regional changes in neuronal activity. These techniques have a high spatial resolution (a few millimeters), but a poor temporal resolution (a few seconds to several minutes). Electroencephalogram (EEG) and MEG measure the neuronal electrical or magnetic activity with a high temporal resolution (i.e., milliseconds) albeit with a poorer spatial resolution (i.e., a few millimeters to one centimeter). The combination of these different neuroimaging techniques allows studying different components of the brain's activity (e.g., neurovascular coupling, electromagnetic activity) with both a high temporal and spatial resolution. [less ▲]

Detailed reference viewed: 210 (22 ULg)
Full Text
Peer Reviewed
See detailCongenital genralized lipodystrophy in an Indian patient with a novel mutation in BSCL2 gene
Shirwalkar, H. U.; Patel, Z. M.; Magre, J. et al

in Journal of Inherited Metabolic Disease (2008), 12

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailCluster expansion method for evolving weighted networks having vector-like nodes
Ausloos, Marcel ULg; Gligor, M.

in Acta Physica Polonica A (2008), 114(3), 491-499

The cluster variation method known in statistical mechanics and condensed matter is revived for weighted bipartite networks. The decomposition (or expansion) of a Hamiltonian through a finite number of ... [more ▼]

The cluster variation method known in statistical mechanics and condensed matter is revived for weighted bipartite networks. The decomposition (or expansion) of a Hamiltonian through a finite number of components, whence serving to define variable clusters, is recalled. As an illustration the network built from data representing correlations between (4) macroeconomic features, i.e. the so-called vector components, of 15 EU countries, as (function) nodes, is discussed. We show that statistical physics principles, like the maximum entropy criterion points to clusters, here in a (4) variable phase space: Gross Domestic Product, Final Consumption Expenditure, Gross Capital Formation and Net Exports. It is observed that the maximum, entropy corresponds to a cluster which does not explicitly include the Gross Domestic Product but only the other (3) "axes", i.e. consumption, investment and trade components. On the other hand, the minimal entropy clustering scheme is obtained from a coupling necessarily including Gross Domestic Product and Final Consumption Expenditure. The results confirm intuitive economic theory and practice expectations at least as regards geographical connexions. The technique can of course be applied to many other cases in the physics of socio-economy networks. [less ▲]

Detailed reference viewed: 17 (0 ULg)
Full Text
Peer Reviewed
See detailMesurer la douleur chez le patient non communicant.
Chatelle, Camille ULg; Vanhaudenhuyse, Audrey ULg; Mergam, Anne-Nora ULg et al

in Revue Médicale de Liège (2008), 63(5-6), 429-37

Pain is a subjective experience. Its assessment is based on the subject's direct verbal report. This method of assessment is, however, impossible in patients who cannot communicate their feelings. In this ... [more ▼]

Pain is a subjective experience. Its assessment is based on the subject's direct verbal report. This method of assessment is, however, impossible in patients who cannot communicate their feelings. In this context, indirect measurements such as behavioral observations or physiological measurements are needed. To facilitate the assessment of pain in non-communicative patients, numerous standardized behavioral scales have been developed. The aim of this review is to discuss the main validated pain scales employed in end-stage dementia, newborn and preverbal children, and severely brain damaged patients with a disorder of consciousness such as coma, the vegetative state or the minimally conscious state. [less ▲]

Detailed reference viewed: 1448 (22 ULg)
Full Text
See detailMECHANICAL PRETREATMENT EFFECT ON CELLULOSE ENZYMATICAL HYDROLYSIS
Jacquet, Nicolas ULg; Paquot, Michel ULg

Poster (2008)

Lignocellulosic materials are very interesting for the production of bioethanol after chemical or enzymatical hydrolysis of cellulose. To optimise production rate and increase the output of these ... [more ▼]

Lignocellulosic materials are very interesting for the production of bioethanol after chemical or enzymatical hydrolysis of cellulose. To optimise production rate and increase the output of these processes, different kinds of pre-treatments (grinding, steam explosion…) are often needed for opening the fibrous structure of the cellulose and increase the specific surface of the materials. The present study is focused on two models of “pure” cellulose (cellulose C200 microtechnik, cellulose FD100 FMC biopolymer) in order to analyse the effects of mechanical pretreatments on the kinetics and yields of hydrolysis. The cristallinity index differentiates the two celluloses. Hydrolysis is realized by a cellulase mix (cellulase Trichoderma reesei C2730, Novozyme; cellobiase Aspergillus niger C6105). Results present the influence of homogenisation pretreatment and analyse differents parameters of this technology. [less ▲]

Detailed reference viewed: 33 (3 ULg)
Full Text
See detailPouvoir et consentement : quelques réflexions impressionnistes
Jacquemain, Marc ULg

in Vrancken, Didier; Dubois, Christophe; Schoenaers, Frédéric (Eds.) Penser la négociation : mélange en hommage à Olgierd Kuty (2008)

L'article confronte deux classiques, "Power" de Steven Lukes et "L'acteur et le système" de Crozier et Friedberg, aux réflexions d'auteurs contemporains comme Beck et Negri sur la nature du pouvoir et son ... [more ▼]

L'article confronte deux classiques, "Power" de Steven Lukes et "L'acteur et le système" de Crozier et Friedberg, aux réflexions d'auteurs contemporains comme Beck et Negri sur la nature du pouvoir et son caractère "immanent". A partir de là, il présente brièvement six propositions sur la nature du pouvoir dans les sociétés démocratiques et le rôle important qu'y joue le consentement. Il termine sur "l'invisibilisation" du pouvoir dans le capitalisme contemporain. [less ▲]

Detailed reference viewed: 35 (5 ULg)
Full Text
Peer Reviewed
See detailDistantly related lipocalins share two conserved clusters of hydrophobic residues: use in homology modeling.
Adam, Benoit; Charloteaux, Benoît ULg; Beaufays, Jérôme ULg et al

in BMC structural biology (2008), 8(1-2), 1-18

BACKGROUND: Lipocalins are widely distributed in nature and are found in bacteria, plants, arthropoda and vertebra. In hematophagous arthropods, they are implicated in the successful accomplishment of the ... [more ▼]

BACKGROUND: Lipocalins are widely distributed in nature and are found in bacteria, plants, arthropoda and vertebra. In hematophagous arthropods, they are implicated in the successful accomplishment of the blood meal, interfering with platelet aggregation, blood coagulation and inflammation and in the transmission of disease parasites such as Trypanosoma cruzi and Borrelia burgdorferi. The pairwise sequence identity is low among this family, often below 30%, despite a well conserved tertiary structure. Under the 30% identity threshold, alignment methods do not correctly assign and align proteins. The only safe way to assign a sequence to that family is by experimental determination. However, these procedures are long and costly and cannot always be applied. A way to circumvent the experimental approach is sequence and structure analyze. To further help in that task, the residues implicated in the stabilisation of the lipocalin fold were determined. This was done by analyzing the conserved interactions for ten lipocalins having a maximum pairwise identity of 28% and various functions. RESULTS: It was determined that two hydrophobic clusters of residues are conserved by analysing the ten lipocalin structures and sequences. One cluster is internal to the barrel, involving all strands and the 310 helix. The other is external, involving four strands and the helix lying parallel to the barrel surface. These clusters are also present in RaHBP2, a unusual "outlier" lipocalin from tick Rhipicephalus appendiculatus. This information was used to assess assignment of LIR2 a protein from Ixodes ricinus and to build a 3D model that helps to predict function. FTIR data support the lipocalin fold for this protein. CONCLUSION: By sequence and structural analyzes, two conserved clusters of hydrophobic residues in interactions have been identified in lipocalins. Since the residues implicated are not conserved for function, they should provide the minimal subset necessary to confer the lipocalin fold. This information has been used to assign LIR2 to lipocalins and to investigate its structure/function relationship. This study could be applied to other protein families with low pairwise similarity, such as the structurally related fatty acid binding proteins or avidins. [less ▲]

Detailed reference viewed: 29 (6 ULg)
Full Text
Peer Reviewed
See detailInteractions between bacterial surfaces and milk proteins, impact on food emulsions stability
Ly, M. H.; Aguedo, Mario ULg; Goudot, S. et al

in Food Hydrocolloids (2008), 22(5), 742-751

Bacteria possess physicochemical surface properties such as hydrophobicity, Lewis acid/base and charge which are involved in physicochemical interactions between cells and interfaces. Moreover, food ... [more ▼]

Bacteria possess physicochemical surface properties such as hydrophobicity, Lewis acid/base and charge which are involved in physicochemical interactions between cells and interfaces. Moreover, food matrices are complex and heterogeneous media, with a microstructure depending on interactions between the components in media (van der Waals, electrostatic or structural forces, etc.). Despite the presence of bacteria in fermented products, few works have investigated how bacteria interact with other food components. The objective of the present study was to determine the effects of the surface properties of lactic acid bacteria on the stability of model food emulsions. The bacteria were added to oil/water emulsions stabilized by milk proteins (sodium caseinate, whey proteins concentrate or whey proteins isolate) at different pH (from 3 to 7.5). The effect of bacteria on the emulsions stability depended on the surface properties of strains and also on the characteristics of emulsions. Flocculation and aggregation phenomena were observed in emulsion at pHs for which the bacterial surface charge was opposed to the one of the proteins. The effects of bacteria on the stability of emulsion depended also on the concentration of cations present in media such as Ca2+. These results show that the bacteria through their surface properties could interact with other compounds in matrices, consequently affecting the stability of emulsions. The knowledge and choice of bacteria depending on their surface properties could be one of the important factors to control the stability of matrices such as fermentation media or fermented products. © 2007 Elsevier Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 17 (0 ULg)
Full Text
See detailAugustinus (Pseudo-), S., De vita christiana
Adam, Renaud ULg

in De Schepper, Marcus; Kelders, Ann; Pauwels, Jan (Eds.) In de ban van boeken. Grote verzamelaars uit de negentiende eeuw in de Koninklijke Bibliotheek van België (2008)

Detailed reference viewed: 9 (0 ULg)
Full Text
See detailPius II (Aeneas Silvio Piccolomini), De duobus amantibus Euryalo et Lucretia
Adam, Renaud ULg

in De Schepper, Marcus; Kelders, Ann; Pauwels, Jan (Eds.) In de ban van boeken. Grote verzamelaars uit de negentiende eeuw in de Koninklijke Bibliotheek van België (2008)

Detailed reference viewed: 15 (0 ULg)
Full Text
See detailMarco Polo, De consuetudinibus et conditionibus orientalium regionum
Adam, Renaud ULg

in De Schepper, Marcus; Kelders, Ann; Pauwels, Jan (Eds.) In de ban van boeken. Grote verzamelaars uit de negentiende eeuw in de Koninklijke Bibliotheek van België (2008)

Detailed reference viewed: 44 (0 ULg)
Full Text
See detailJuan Luis Vives, Introductio ad Sapientiam. Satellitium sive Symbola. Epistolae duae de ratione studii puerilis
Adam, Renaud ULg

in De Schepper, Marcus; Kelders, Ann; Pauwels, Jan (Eds.) In de ban van boeken. Grote verzamelaars uit de negentiende eeuw in de Koninklijke Bibliotheek van België (2008)

Detailed reference viewed: 35 (0 ULg)