References of "2006"
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See detailAperçu de l’histoire du Trésor de la cathédrale de Liège
George, Philippe ULg

in Bulletin de la Société Royale Le Vieux-Liège (2006), t. XV, n° 314

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See detailInvasion intracellulaire des cellules non-phagocytaires par Staphylococcus aureus
Boulanger, Delphine; Bureau, Fabrice ULg; Lekeux, Pierre ULg

in Annales de Médecine Vétérinaire (2006), 150(1), 27-42

Intracellular invasion of Staphyloccocus aureus in nonphagocytic cells Staphylococcus aureus often causes chronic diseases. It is now believed that recurrence of these infections could be related to the ... [more ▼]

Intracellular invasion of Staphyloccocus aureus in nonphagocytic cells Staphylococcus aureus often causes chronic diseases. It is now believed that recurrence of these infections could be related to the ability of S. aureus to invade and persist within nonphagocytic cells. Adherence to eucaryotic cells is crucial for S. aureus to invade and persist within invasion and depends on interactions between bacterial fibronectin-binding proteins, fibronectin and the host cell fibronectin receptor, integrin alpha(5)beta(1). It is currently established that fibronectin acts as a bridging molecule. Penetration of S. aureus in host cells requires also activation of protein tyrosine kinases that mediate signal transduction and actin polymerization leading to cytoskeletal rearrangements. After internalization, S. aureus either remains in membrane-bound vacuoles or appears free in the cytoplasm. After bacterial proliferation, S. aureus induces host cell apoptosis or persist inside cells as small colony variants, which represent a less virulent subpopulation of S. aureus that grows slower. Although numerous in vitro and in vivo studies have demonstrated the ability of S. aureus to invade nonphagocytic cells, additional experiments have to be realized to understand the relevance of intracellular localization in vivo. [less ▲]

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See detailLe rôle prépondérant de la sanction financière et sa proportionnalité en droit pénal social
Kefer, Fabienne ULg

in Born, Michel; Lemaître, André (Eds.) Une criminologie de la tradition à l'innovation, En hommage à Georges Kellens (2006)

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See detailFunctional neuroanatomy of the hypnotic state.
Faymonville, Marie-Elisabeth ULg; Boly, Mélanie ULg; Laureys, Steven ULg

in Journal of Physiology - Paris (2006), 99(4-6), 463-9

The neural mechanisms underlying hypnosis and especially the modulation of pain perception by hypnosis remain obscure. Using PET we first described the distribution of regional cerebral blood flow during ... [more ▼]

The neural mechanisms underlying hypnosis and especially the modulation of pain perception by hypnosis remain obscure. Using PET we first described the distribution of regional cerebral blood flow during the hypnotic state. Hypnosis relied on revivification of pleasant autobiographical memories and was compared to imaging autobiographical material in "normal alertness". The hypnotic state was related to the activation of a widespread set of cortical areas involving occipital, parietal, precentral, premotor, and ventrolateral prefrontal and anterior cingulate cortices. This pattern of activation shares some similarities with mental imagery, from which it mainly differs by the relative deactivation of precuneus. Second, we looked at the anti-nociceptive effects of hypnosis. Compared to the resting state, hypnosis reduced pain perception by approximately 50%. The hypnosis-induced reduction of affective and sensory responses to noxious thermal stimulation were modulated by the activity in the midcingulate cortex (area 24a'). Finally, we assessed changes in cerebral functional connectivity related to hypnosis. Compared to normal alertness (i.e., rest and mental imagery), the hypnotic state, significantly enhanced the functional modulation between midcingulate cortex and a large neural network involved in sensory, affective, cognitive and behavioral aspects of nociception. These findings show that not only pharmacological but also psychological strategies for pain control can modulate the cerebral network involved in noxious perception. [less ▲]

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See detailDiffuse dermal angiomatosis: A previously undescribed pattern of immunoglobulin and complement deposits in two cases.
Quatresooz, Pascale ULg; Fumal, Isabelle; Willemaers, Valentine et al

in American Journal of Dermatopathology (2006), 28(2), 150-4

Two cases of diffuse dermal angiomatosis are reported in middle-aged women. This rare disease of unknown origin is characterized by increased dermal angiomatosis and ulceration. The clinical and ... [more ▼]

Two cases of diffuse dermal angiomatosis are reported in middle-aged women. This rare disease of unknown origin is characterized by increased dermal angiomatosis and ulceration. The clinical and histologic presentations of the presently reported lesions were typical for this disorder. Endothelial cells exhibited a normal immunophenotype. The perivascular basement membranes showed a distribution of collagen alpha chains typical for blood vessels, but not for lymphatics. Immunohistochemistry revealed other undescribed features. At the site of the clinical lesions, linear and granular deposits of immunoglobulins A and M, and complement were found around the vessels and at the dermal-epidermal junction. The same deposits were also found restricted to the dermal-epidermal junction in the peripheral clinically intact skin. No serological signs of auto-immune disorder were detected in one patient. A monoclonal gammopathy was disclosed in the other patient. A pattern of immunoreactant deposits similar to that disclosed in the two patients was not found in the control specimens, and has not been described so far in other types of vascular hyperplasia and neoplasia. A pathogenic role of these deposits is unsettled and should be further explored. [less ▲]

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See detailRole of tumor-associated lipogenesis in the formation and composition of membrane microdomains
Timmermans, L.; Kischel, Philippe; Beckers, Albert ULg et al

Conference (2006)

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See detailStudy of the combined effects of temperature, pH and Aw on the growth rate of Trichoderma asperellum using a response surface methodology
Begoude, B. A. D.; Lahlali, R.; Friel, D. et al

Poster (2006)

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See detailHigh-sensitivity staining of proteins for one- and two-dimensional gel electrophoresis using post migration covalent staining with a ruthenium fluorophore.
Tokarski, Caroline; Cren-Olive, Cecile; Fillet, Marianne ULg et al

in Electrophoresis (2006), 27(7), 1407-16

This paper describes the use of a ruthenium complex ((bis(2,2'-bipyridine)-4'-methyl-4-carboxybipyridine-ruthenium-N-succidimyl ester-bis(hexafluorophosphate), abbreviated below as ASCQ_Ru) commercially ... [more ▼]

This paper describes the use of a ruthenium complex ((bis(2,2'-bipyridine)-4'-methyl-4-carboxybipyridine-ruthenium-N-succidimyl ester-bis(hexafluorophosphate), abbreviated below as ASCQ_Ru) commercially available and chemically pure. This new ruthenium complex ASCQ_Ru brings an activated ester, allowing the selective acylation of amino acid side chain amines for the post migration staining of proteins separated in 1-DE and 2-DE. The protocol used is a simple three-step protocol fixing the proteins in the gel, staining and then washing, as no lengthy destaining step is required. First the critical staining step was optimized. Although in solution the best described pH for acylating proteins with this reagent is phosphate buffer at pH 7.0, we found that best medium for in-gel staining is unbuffered ACN/water solution (20/80 v/v). The two other steps are less critical and classical conditions are satisfactory: fixing with 7% acetic acid/10% ethanol solution and washing four times for 10 min with water. Sensitivity tests were performed using 1-DE on protein molecular weight markers. We obtained a higher sensitivity than SYPRO Ruby with a detection limit of 80 pg of protein per well. However, contrary to SYPRO Ruby, ASCQ_Ru exhibits a logarithmic dependency on the amount of protein. The dynamic range is similar to SYPRO Ruby and is estimated between three and four orders of magnitude. Finally, the efficiency of the post migration ASCQ_Ru staining for 2-D gel separation is demonstrated on the whole protein extract from human colon carcinoma cells lines HCT 116. ASCQ_Ru gave the highest number of spot detected compared to other common stains Colloidal CBB, SYPRO Ruby and Deep Purple. [less ▲]

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See detailValidation of a portable equine metabolic measurement system
Art, Tatiana ULg; Duvivier, D. H.; van Erck, Emmanuelle et al

in Equine Veterinary Journal. Supplement (2006), 36

REASONS FOR PERFORMING STUDY: In equine sports medicine, VO2 has been measured exclusively with stationary systems, in laboratories equipped with a treadmill. Measurement during exercise in field ... [more ▼]

REASONS FOR PERFORMING STUDY: In equine sports medicine, VO2 has been measured exclusively with stationary systems, in laboratories equipped with a treadmill. Measurement during exercise in field conditions has not previously been reported because of the lack of portable equipment designed for horses. OBJECTIVES: A commercially available portable metabolic measurement system, based on breath-to-breath gas analysis and flow spirometry, was adapted to the horse's physiology and morphology (Cosmed K4b2 and Equimask) and its validity tested by (1) repeatability of the measures and (2) comparing metabolic data to those obtained by a reference method (RM). METHODS: To test the reproducibility of the measurements, 5 healthy saddle horses were subjected twice at 2 day intervals to a similar submaximal standardised incremental exercise test on a treadmill. The same horses performed twice at one week interval an incremental treadmill test to fatigue: the oxygen consumption and ventilation were measured once with the K4b2 system and once with the RM. The metabolic and ventilatory data obtained with both systems were compared. RESULTS: There was a good reproducibility of the metabolic measurements obtained by the K4b2 system at any workload. The VO2 obtained by both systems at any workload was not significantly different. However, the K4b2 expired fraction in CO2 (FETCO2) and carbon dioxide production (VCO2) were significantly lower at high and at maximal workloads. As a consequence, the values of the respiratory exchange ratio were too low and incompatible with normal physiological values. CONCLUSIONS: The good reproducibility of the metabolic and ventilatory measurements and the fact that the VO2 measurements at any workload were similar to the data obtained with the reference method suggested that this system may be used for comparison of repeated VO2 measurements in practical field conditions. POTENTIAL RELEVANCE: The K4b2 system could be used to improve knowledge of the energetic cost in different equine sports disciplines and offer the opportunity to undertake performance tests with genuine track conditions, on ridden or harnessed horses, rather than under laboratory conditions [less ▲]

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See detailIdentification de gènes d'intérêt pour le traitement du cheval poussif
Ramery, Eve ULg; Closset, Rodrigue; Salinas, Emmanuelle et al

in Proceedings: AVEF, Versailles, France (2006)

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See detailLa compétence discursive en français et néerlandais - L2: aspects prosodiques et syntaxiques du marquage du focus
Rasier, Laurent ULg

in Cahiers de l'institut de linguistique de Louvain (2006), 1(4), 313-332

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See detailThe lymphatic ring assay: a new in vitro model of lymphangiogenesis
Bruyère, F; Melen, L; Blacher, Silvia ULg et al

Poster (2006)

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See detailEnergy conserving balance of explicit time steps to combine implicit and explicit algorithms in structural dynamics
Noels, Ludovic ULg; Stainier, Laurent ULg; Ponthot, Jean-Philippe ULg

in Computer Methods in Applied Mechanics & Engineering (2006), 195(19-22), 21692192

Recent developments have proved the advantage of combining both time implicit and time explicit integration algorithms in structural dynamics. A major problem is to define the initial conditions for the ... [more ▼]

Recent developments have proved the advantage of combining both time implicit and time explicit integration algorithms in structural dynamics. A major problem is to define the initial conditions for the implicit simulation on the basis of a solution obtained from an unbalanced explicit resolution. The unbalanced nature of the explicit algorithm leads to oscillations in the fields of interest. Therefore, the values obtained after an explicit computation cannot be used directly as initial conditions for an implicit simulation. In this paper, we develop such initial values that lead to a stable (no numerical creation of energy) and energy-conserving transition. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

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See detailFinite element simulations of nanoindentation in beta metastable Ti alloys
Gerday, Anne-Françoise ULg; Clement, N.; Jacques, P. J. et al

in Juster, Neal; Rosochowski, Andrzej (Eds.) Proceedings of the 9th International ESAFORM Conference on Material Forming (2006)

Nanoindentation is a versatile tool to probe local plastic properties of materials. Finite element (FE) modelling is currently used to identify material data from nanoindentation tests [1-4]. The general ... [more ▼]

Nanoindentation is a versatile tool to probe local plastic properties of materials. Finite element (FE) modelling is currently used to identify material data from nanoindentation tests [1-4]. The general ambition of this research is to extract the material parameters describing the response of a new Ti alloy, called Ti-555, in order to perform simulations on representative microscopic cells and guide the optimisation of this alloy. In this paper, the first steps of the identification of the macroscopic flow parameters of the β-phase are described. The nanoindentation tests using a pyramidal Berkovich diamond indenter are performed in the β-phase. The FEM results with different parameters of an isotropic and anisotropic elasto-plastic (EP) constitutive law are analyzed and the predicted shapes are compared to the final shape of the indented material. The FE results very much depend on physical model choices, and cannot rely on an automatic identification approach. [less ▲]

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See detailDINEOF reconstruction of clouded images including error maps. Application to the Sea-Surface Temperature around Corsican Island
Beckers, Jean-Marie ULg; Barth, Alexander ULg; Alvera Azcarate, Aïda ULg

in Ocean Science (2006), 2

We present an extension to the Data INterpolating Empirical Orthogonal Functions (DINEOF) technique which allows not only to fill in clouded images but also to provide an estimation of the error ... [more ▼]

We present an extension to the Data INterpolating Empirical Orthogonal Functions (DINEOF) technique which allows not only to fill in clouded images but also to provide an estimation of the error covariance of the reconstruction. This additional information is obtained by an analogy with optimal interpolation. It is shown that the error fields can be obtained with a clever rearrangement of calculations at a cost comparable to that of the interpolation itself. The method is presented on the reconstruction of sea-surface temperature in the Ligurian Sea and around the Corsican Island (Mediterranean Sea), including the calculation of inter-annual variability of average surface values and their expected errors. The application shows that the error fields are not only able to reflect the data-coverage structure but also the covariances of the physical fields. [less ▲]

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See detailHigh-pressure study of the beta-to-alpha transition in Ga2O3
Machon, D.; McMillan, P. F.; Xu, Bin ULg et al

in Physical Review. B, Condensed Matter and Materials Physics (2006), 73(9),

The high-pressure behavior of Ga2O3 is studied up to 40 GPa using synchrotron x-ray diffraction and Raman spectroscopy in diamond anvil cells. A phase transformation from the monoclinic beta-phase (C2/m ... [more ▼]

The high-pressure behavior of Ga2O3 is studied up to 40 GPa using synchrotron x-ray diffraction and Raman spectroscopy in diamond anvil cells. A phase transformation from the monoclinic beta-phase (C2/m) is observed at a pressure above 20-22 GPa. The high-pressure polymorph is identified as the alpha-phase that is isostructural with corundum (R (3) over barc symmetry) from the x-ray diffraction data. However, considerable anion disorder is indicated by the appearance of broad bands in the Raman spectra. The experimental results are complemented by ab initio theoretical calculations of the energetics of the two structures and the lattice dynamics. [less ▲]

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