References of "2004"
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See detailPartial Atomic Charges Of Amino Acids In Proteins
Thomas, Annick ULg; Milon, A.; Brasseur, Robert ULg

in Proteins-Structure Function and Bioinformatics (2004), 56(1), 102-9

Using a semiempirical quantum mechanical procedure (FCPAC) we have calculated the partial atomic charges of amino acids from 494 high-resolution protein structures. To analyze the influence of the protein ... [more ▼]

Using a semiempirical quantum mechanical procedure (FCPAC) we have calculated the partial atomic charges of amino acids from 494 high-resolution protein structures. To analyze the influence of the protein's environment, we considered each residue under two conditions: either as the center of a tripeptide with PDB structure geometry (free) or as the center of 13-16 amino acid clusters extracted from the PDB structure (buried). The partial atomic charges from residues in helices and in sheets were separated. The FCPAC partial atomic charges of the Cbeta and Calpha of most residues correlate with their helix propensity, positively for Cbeta and negatively for Calpha (r2 = 0.76 and 0.6, respectively). The main consequence of burying residues in proteins is the polarization of the backbone C=O bond, which is more pronounced in helices than in sheets. The average shift of the oxygen partial charges that results from burying is -0.120 in helix and -0.084 in sheet with the charge of the proton as unit. Linear correlations are found between the average NMR chemical shifts and the average FCPAC partial charges of Calpha (r2 = 0.8-0.85), N (r3 = 0.67-0.72), and Cbeta (r2 = 0.62) atoms. Correlations for helix and beta-sheet FCPAC partial charges show parallel regressions, suggesting that the charge variations due to burying in proteins differentiate between the dihedral angle effects and the polarization of backbone atoms. [less ▲]

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See detailEffect of reducing energy supply during the finishing of Belgian Blue double-muscled cull cows
Cabaraux, Jean-François ULg; Dotreppe, Olivier ULg; Dufrasne, Isabelle ULg et al

in Animal Science (2004), 79(Part 3), 469-482

A 4-year experiment has been conducted on finishing Belgian Blue cull cows of double-muscled type in order to study the effects of diets containing adequate levels of metabolizable protein, but either ... [more ▼]

A 4-year experiment has been conducted on finishing Belgian Blue cull cows of double-muscled type in order to study the effects of diets containing adequate levels of metabolizable protein, but either normal (NENP), low (LENP) or medium (MENP) levels of metabolizable energy, on animal performance, carcass and meat characteristics, and plasma metabolites and hormones. The LENP diet was offered during the whole (LENP group) or second half of the finishing (NENP-LENP groups), and the MENP diet during the whole finishing (MENP group). The degree of fatness required for the slaughter of animals from NENP groups was close to 4.5 (scale from 0 (very lean) to 5 (very fat)). In each underfed group, the slaughter of the animals was synchronized to that of NENP cows, by degressive degree of fatness. The same duration of finishing was thus obtained for all groups. The experimental feeding strategies reduced the amounts of fat deposited in the carcass and the meat while muscle deposition was remarkably preserved. The proportions of saturated and monounsaturated fatty acids in intramuscular fat were also decreased while their proportions increased in plasma free fatty acids. Plasma insulin levels were also reduced and those of IGF-1 were, surprisingly, maintained. The low energy diet promoted thus the settlement of a discrete lipolytic state while high levels of IGF-1 preserved muscle deposition. This feeding strategy should be evaluated in other breeds of cattle. [less ▲]

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See detailLa brique crue
Berthelet, Yann ULg

E-print/Working paper (2004)

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See detailRecovering missing data in satellite images. An application to adriatic sst and comparison with in situ data
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Rixen, M. et al

Conference (2004)

Satellite images are very useful for many applications in oceanography and other environmental sciences. They offer a great coverage both in time and space, not attained by in situ measurements. Clouds ... [more ▼]

Satellite images are very useful for many applications in oceanography and other environmental sciences. They offer a great coverage both in time and space, not attained by in situ measurements. Clouds are responsible for missing data on images provided by receptors working in the visible and IR range receptors. In some seasons the cloud coverage can reach an important percentage. Many data analysis techniques do not need a total coverage, although it is always desirable. Some applications, such as Empirical Orthogonal Function (EOF) analysis, or wavelet decomposition need a complete set of data, and a technique for recovering these missing data is indispensable. In this work we present DINEOF (Data INterpolating Empirical Orthogonal Functions), a method for the reconstruction of satellite data, based on an EOF decomposition. DINEOF reconstructs the missing data from an optimal set of EOFs. The optimal number of EOFs is determined by cross-validation. This method has shown to obtain robust results. DINEOF has been applied to a series of 105 AVHRR SST images of the Adriatic Sea, in a period ranging from May to October 1995. The mean cloud coverage of this data set is 52%. The error obtained by the cross-validation is of 0.6°C, and a total of 10 EOFs were necessary to reconstruct the data. A comparison with in situ data obtained form the MEDAR/Medatlas database is made. A total of 452 stations are examined. The RMS error between MEDAR/Medatlas and the reconstructed data is of 0.95°C. The error between MEDAR/Medatlas data and the points that are not missing in the Adriatic data set is of 0.67°C, which can be considered as the inherent error between the in situ and remote sensed data sets. [less ▲]

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See detailFiscal policy in an ovrelapping generations model with bequest-as-consumption
Michel, Philippe; Pestieau, Pierre ULg

in Journal of Public Economic Theory (2004)

This paper analyzes an overlapping generation (OLG) growth model wherein saving finances second period consumption and bequest-as-consumption. First, it looks at the market equilibrium and at the optimal ... [more ▼]

This paper analyzes an overlapping generation (OLG) growth model wherein saving finances second period consumption and bequest-as-consumption. First, it looks at the market equilibrium and at the optimal solution; then it turns to the issue of decentralizing the optimal solution with various taxes and transfers. Depending on the available instruments, either a first-best or a second-best optimum can be achieved. Throughout the paper, the results are contrasted with those obtained in the standard OLG model without intergenerationel transfers. [less ▲]

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See detailUne approche cognitive en psychopathologie
Van der Linden, Martial ULg

in Ferreri, M. (Ed.) Anxiété, anxiolytiques et troubles cognitifs (2004)

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See detailLes garçons et l’engagement dans la lecture ; une histoire impossible ?
Schillings, Patricia ULg

in Caractères (2004), 16(6-12),

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See detailDouble-faced monster in the bottlenosed dolphin (Tursiops truncatus) found in the Mediterranean sea
Dabin, W.; Cesarini, C.; Clemenceau, I. et al

in Veterinary Record : Journal of the British Veterinary Association (2004), 154(10), 306-308

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See detailLes entrepreneurs d'un "autre" demain
Mertens de Wilmars, Sybille ULg

Article for general public (2004)

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See detailImpact of training and exercise intensity on blood antioxidant markers in healthy Standardbred horses
De Moffarts, Brieuc; Kirschvink, Nathalie; Art, Tatiana ULg et al

in Equine & Comparative Exercise Physiology (2004), 1(3), 211-220

This study investigated the effect of training and exercise intensity on blood antioxidant markers in six healthy Standardbred horses. Markers studied were uric acid (UA), ascorbic acid (AA), α-tocopherol ... [more ▼]

This study investigated the effect of training and exercise intensity on blood antioxidant markers in six healthy Standardbred horses. Markers studied were uric acid (UA), ascorbic acid (AA), α-tocopherol, vitamin A (Vit A), superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione – reduced (GSH) and oxidized (GSSG), glutathione redox ratio (GRR), copper (Cu), zinc (Zn) and selenium (Se). The horses performed a standardized exercise test (SET) when they were untrained (T0), after 4 weeks of light training (T4) and after 8 weeks of interval training (T12). Forty-eight hours after SET T4 and SET T12, a SET with run up to fatigue (TTF4 and TTF12) was performed. Maximal oxygen consumption (V˙O2max) was determined within 3–5 days after TTF4 and TTF12. At each test (SET T(i) and TTF(i)), venous blood was sampled at rest (R), peak-exercise (Emax), 15 (E15) and 60 (E60) min after the test. UA, AA and GRR were increased significantly by the exercise, whereas GSH and Vit A were decreased significantly (P<0.05). Training-related increases (T0 vs. T4 vs. T12) were observed for UA, SOD, GPx and Se, whereas GSH, α-tocopherol and Zn decreased (P<0.05). Exercise intensity (TTF(i) vs. T(i)) increased UA and AA significantly and decreased GSH significantly (P<0.05). A significant correlation between ΔSOD and ΔV˙O2max (r=0.86, p<0.05) determined at SET T4 and SET T12 was found. Taken together, these results indicate that training and exercise intensity significantly influence blood antioxidant markers in healthy Standardbred horses [less ▲]

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See detailEtude de la consolidation du béton frais sur base de la porosité à l'état durci
Willem; Darimont, Anne ULg; Degeimbre, Robert et al

in Courard, Luc (Ed.) Compte-rendu des Journées Scinetifiques du (RF)2B (2004)

La consolidation est le terme qui désigne la sédimentation des grains dans les suspensions très denses comme le béton. Le resserrement du squelette granulaire du béton frais entraîne une exsudation d’eau ... [more ▼]

La consolidation est le terme qui désigne la sédimentation des grains dans les suspensions très denses comme le béton. Le resserrement du squelette granulaire du béton frais entraîne une exsudation d’eau qui s’accumule à la surface de l’échantillon, formant la couche d’eau de ressuage. Cette migration de l’eau est à l’origine de nombreux défauts dans le béton qui mettent en péril sa durabilité. Le but de ce travail est de mettre en évidence l’existence d’une relation entre le ressuage et la porosité à l’état durci du béton. [less ▲]

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See detailLes données du Réseau Wallon de Comptabilité Agricole (RWCA)
Dogot, Thomas ULg; Lebailly, Philippe ULg

in Direction Générale de l'Agriculture, Division de la Politique Agricole (IG1) et Direction de l'Analyse Economique Agricole (D14); Conseil Supérieur Wallon de l'Agriculture, de l'Agro-alimentaire et de l'Alimentation (CSWAAA) (Eds.) Evolution de l'économie agricole et horticole de la Région wallonne en 2002 (2004)

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See detailEvaluation des traumatismes crâniens légers chez l’enfant
Closset, Annette; Catale, Corinne ULg

in Meulemans, Thierry; Philippe, Azouvi; Françoise, Coyette (Eds.) et al Neuropsychologie des traumatismes crâniens légers (2004)

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See detailS'engager dans la lecture : un investissement au service des compétences
Lafontaine, Dominique ULg

in Actes du 3e congrès des chercheurs en éducation, Bruxelles, 16-17 mars 2004 (2004)

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See detailThe neuropsychology of insight
Laroi, Frank ULg; Barr, William; Keefe, Richard

in Amador, Xavier; David, Anthony (Eds.) Insight and Psychosis (2004)

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See detailDownregulation of ICAM-1 and VCAM-1 expression in endothelial cells treated by photodynamic therapy
Volanti, Cédric ULg; Gloire, Geoffrey ULg; Vanderplasschen, Alain ULg et al

in Oncogene (2004), 23(53), 8649-8658

Photodynamic therapy (PDT) is a treatment for cancer and several noncancerous proliferating cell diseases that depends on the uptake of a photosensitizing compound followed by selective irradiation with ... [more ▼]

Photodynamic therapy (PDT) is a treatment for cancer and several noncancerous proliferating cell diseases that depends on the uptake of a photosensitizing compound followed by selective irradiation with visible light. In the presence of oxygen, irradiation leads to the production of reactive oxygen species (ROS). A large production of ROS induces the death of cancer cells by apoptosis or necrosis. A small ROS production can activate various cellular pathways. Here, we show that PDT by pyropheophorbide-a methyl ester (PPME) induces the activation of nuclear factor kappa B (NF-kappaB) in HMEC-1 cells. NF-kappaB is active since it binds to the NF-kappaB sites of both ICAM-1 and vascular cell adhesion molecule-1 (VCAM-1) promoters and induces the transcription of several NF-kappaB target genes such as those of IL-6, ICAM-1, VCAM-1. In contrast, expression of ICAM-1 and VCAM-1 at the protein level was not observed, although we measured an IL-6 secretion. Using specific chemical inhibitors, we showed that the lack of ICAM-1 and VCAM-1 expression is the consequence of their degradation by lysosomal proteases. The proteasome and calpain pathways were not involved. All these observations were consistent with the fact that no adhesion of granulocytes was observed in these conditions. [less ▲]

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See detailIntégration sociale et multiculturelle en Province de Liège
Jamin, Jérôme ULg

Report (2004)

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