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See detailAtomic structure of the Te/Si(100)-2x1 surface
Wiame, Frédéric; Dumont, Jacques; Sporken, Robert et al

in Physical Review. B : Condensed Matter (2005), 72

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See detailATOMIC STRUCTURES OF HEAVY ELEMENTS : RECENT PROGRESS AND PERSPECTIVES
Biémont, Emile ULg; Fivet, V.; Palmeri, P. et al

Conference (2008)

In the present paper, we discuss some recent advances concerning the determination of new radiative parameters (transition probabilities, oscillator strengths, radiative lifetimes, branching fractions ... [more ▼]

In the present paper, we discuss some recent advances concerning the determination of new radiative parameters (transition probabilities, oscillator strengths, radiative lifetimes, branching fractions, Landé factors) in heavy ions. We also emphasize the difficulties that are frequently met in the field and that sometimes prevent obtaining accurate atomic data for the transitions of astrophysical interest. We concentrate particularly on the determination of radiative parameters for selected rare-earth (RE) ions (lanthanides and actinides) and for some atoms and ions of the sixth row of the periodic table. [less ▲]

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See detailAtomic transition probabilities in Bi II
Palmeri, P.; Quinet, Pascal ULg; Biémont, Emile ULg

in Physica Scripta (2001), 63

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See detailAtomically precise interfaces from non-stoichiometric deposition
Nie, Y. F.; Zhu, Y.; Lee, C.-H. et al

in Nature Communications (2014), 5

Complex oxide heterostructures display some of the most chemically abrupt, atomically precise interfaces, which is advantageous when constructing new interface phases with emergent properties by ... [more ▼]

Complex oxide heterostructures display some of the most chemically abrupt, atomically precise interfaces, which is advantageous when constructing new interface phases with emergent properties by juxtaposing incompatible ground states. One might assume that atomically precise interfaces result from stoichiometric growth. Here we show that the most precise control is, however, obtained by using deliberate and specific non-stoichiometric growth conditions. For the precise growth of Srnþ1TinOnþ1 Ruddlesden–Popper (RP) phases, stoichiometric deposition leads to the loss of the first RP rock-salt double layer, but growing with a strontium-rich surface layer restores the bulk stoichiometry and ordering of the subsurface RP structure. Our results dramatically expand the materials that can be prepared in epitaxial heterostructures with precise interface control—from just the n¼N end members (perovskites) to the entire RP homologous series—enabling the exploration of novel quantum phenomena at a richer variety of oxide interfaces. [less ▲]

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See detailAtomistic account of structural and dynamical changes induced by small binders in the double helix of a short DNA
Fresch, Barbara ULg; Remacle, Françoise ULg

in Physical Chemistry Chemical Physics [=PCCP] (in press)

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See detailAn atomistic view of DNA dynamics and its interaction with small binders: insights from Molecular Dynamics and Principal Component Analysis
Fresch, Barbara ULg; Remacle, Françoise ULg

in Joachim, Christian (Ed.) Advances in Atom and Single Molecule Machines (in press)

DNA oligomers are promising building blocks for the development of bottom-up nano-devices and molecular logic machines. To control and exploit their unique capabilities of self-assembling and molecular ... [more ▼]

DNA oligomers are promising building blocks for the development of bottom-up nano-devices and molecular logic machines. To control and exploit their unique capabilities of self-assembling and molecular recognition a deep understanding of their dynamical properties is essential. We theoretically investigate the dynamics of a DNA dodecamer and its complexes with two common ligands, Hoechst33258 and the ethidium cation, by means of classical Molecular Dynamics (MD) simulations and Principal Component Analysis (PCA). We study the structural relation between the flexibility of the double helix and the binding process. The dynamics of a terminal base pair unbinding is also analysed as an example of process that involves multiple energy minima in the underlying free energy landscape. [less ▲]

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See detailAtomwaffen und die Europaïsche verteidigungsidentität
Dumoulin, André ULg

Report (1996)

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See detailAtopy controlling loci in Czech and Russian populations
Gusareva, Elena ULg; Badalová, Jana; Havelková, Helena et al

Poster (2010, April)

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See detailAtouts et limites des entreprises sociales
Mertens de Wilmars, Sybille ULg

Conference given outside the academic context (2011)

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See detailLes atouts multiples de la lemmatisation : l’exemple du latin
Mellet, Sylvie; Purnelle, Gérald ULg

in JADT 2002, 6es Journées internationales d’Analyse statistique des Données Textuelles (2002)

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See detailAtouts, faiblesses et défis futurs de la filière lait et produits laitiers en Belgique
Burny, Philippe ULg

in Centre wallon de Recherches agronomiques (Ed.) Seizième Carrefour des Productions Animales "La Filière laitière bovine européenne est-elle durable ?" (2011)

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See detailATOX - The ESTEC Atomic Oxygen Simulation Facility
Barbier, Christian ULg; Flebus, Carlo; Van Eesbeek, Marc

in Preparing for the Future (1992), 2

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See detailATP Augments von Willebrand Factor-dependent Shear-induced Platelet Aggregation through Ca2+-Calmodulin and Myosin Light Chain Kinase Activation
Oury, Cécile ULg; Sticker, Elsie; Cornelissen, Heidi et al

in Journal of Biological Chemistry (2004)

Shear stress triggers von Willebrand factor (VWF) binding to platelet glycoprotein Ibalpha and subsequent integrin alpha(IIb)beta(3)-dependent platelet aggregation. Concomitantly, nucleotides are released ... [more ▼]

Shear stress triggers von Willebrand factor (VWF) binding to platelet glycoprotein Ibalpha and subsequent integrin alpha(IIb)beta(3)-dependent platelet aggregation. Concomitantly, nucleotides are released from plateletdense granules, and ADP is known to contribute to shear-induced platelet aggregation (SIPA). This study shows that ATP also contributes to SIPA. The ATP-gated P2X(1) ion channel induces MLC-mediated cytoskeletal rearrangements that increases platelet degranulation during VWF-triggered platelet activation. [less ▲]

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See detailATP dependeny assembly of a ternary complex consisting of DNA Mismatch and the yeast Msh2-Msh6 and Mlh1-Pms1 protein complexes
Habraken, Yvette ULg; Sung, Patrick; Prakash, Louise et al

in Journal of Biological Chemistry (1998), 273(16), 9837-41

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See detailATP-driven, Na(+)-independent inward Cl- pumping in neuroblastoma cells
Bettendorff, Lucien ULg; Lakaye, Bernard ULg; Margineanu, Ilca et al

in Journal of Neurochemistry (2002), 81(4), 792-801

In immature neurones, the steady-state intracellular Cl- concentration [Cl-](i) is generally higher than expected for passive distribution, and this is believed to be due to Na(+)-K(+)-2Cl(-) co-transport ... [more ▼]

In immature neurones, the steady-state intracellular Cl- concentration [Cl-](i) is generally higher than expected for passive distribution, and this is believed to be due to Na(+)-K(+)-2Cl(-) co-transport. Here, we show that N2a neuroblastoma cells, incubated in HEPES-buffered NaCl medium maintain a [Cl-](i) around 60 mm, two- to threefold higher than expected for passive distribution at a membrane potential of - 49 mV. When the cells were transferred to a Cl(-) -free medium, [Cl-](i) decreased quickly (t(1/2) < 5 min), suggesting a high Cl- permeability. When the intracellular ATP concentration was reduced to less than 1 mm by metabolic inhibitors, the initial rate of (36) Cl- uptake was strongly inhibited (60-65%) while steady-state [Cl-](i) decreased to 24 mm, close to the value predicted from the Nernst equilibrium. Moreover, after reduction of [ATP](i) and [Cl-](i) by rotenone, the subsequent addition of glucose led to a reaccumulation of Cl-, in parallel with ATP recovery. Internal bicarbonate did not affect Cl- pumping, suggesting that Cl-/HCO(3)(-) exchange does not significantly contribute to active transport. Likewise, Na(+) -K(+) -2Cl(-) co-transport also appeared to play a minor role: although mRNA for the NKCC1 form of the co-transporter was detected in N2a cells, neither the initial rate of (36)Cl- uptake nor steady-state [Cl-](i) were appreciably decreased by 10 microm bumetanide or replacement of external Na(+) by choline. These results suggest that a highly active ATP-dependent mechanism, distinct from Na(+) -K(+) -2Cl(-) co-transport, is responsible for most of the inward Cl- pumping in N2a cells. [less ▲]

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See detailThe ATP-gated P2X1 ion channel acts as a positive regulator of platelet responses to collagen.
Oury, Cécile ULg; Toth-Zsamboki, Emese; Thijs, Chantal et al

in Thrombosis and Haemostasis (2001)

This study shows that, during collagen-initiated platelet activation, the early secretion of ATP results in the activation of the P2X1 ion channel, which plays a role as a positive regulator of further ... [more ▼]

This study shows that, during collagen-initiated platelet activation, the early secretion of ATP results in the activation of the P2X1 ion channel, which plays a role as a positive regulator of further platelet responses. [less ▲]

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See detailATP-gated P2X1 ion channels protect from endotoxemia by dampening neutrophil activation
Lecut, Christelle ULg; Faccinetto, Céline ULg; Delierneux, Céline ULg et al

in Journal of Thrombosis and Haemostasis [=JTH] (2012), 10(3), 453-65

Background: In sepsis, extracellular ATP, secreted by activated platelets and leukocytes, may contribute to the crosstalk between hemostasis and inflammation. Previously, we showed that, in addition to ... [more ▼]

Background: In sepsis, extracellular ATP, secreted by activated platelets and leukocytes, may contribute to the crosstalk between hemostasis and inflammation. Previously, we showed that, in addition to their role in platelet activation, ATP-gated P2X1 ion channels are involved in promoting neutrophil chemotaxis. <br />Objectives: To elucidate the contribution of P2X1 ion channels to sepsis and associated disturbance of hemostasis. <br />Methods: We used P2X1-/- mice in a model of lipopolysaccharide (LPS)-induced sepsis. Hemostasis and inflammation parameters were analysed together with outcome. Mechanisms were further studied ex vivo using mouse and human blood or isolated neutrophils and monocytes. <br />Results: P2X1-/- mice were more susceptible to LPS-induced shock than wild-type mice despite normal cytokine production. Plasma levels of thrombin-antithrombin complexes were higher, thrombocytopenia was worsened and whole blood coagulation time was markedly reduced, pointing to aggravated hemostasis disturbance in the absence of P2X1. However, whole blood platelet aggregation occurred normally and P2X1-/- macrophages displayed normal levels of total tissue factor activity. We found that P2X1-/- neutrophils produced higher amounts of reactive oxygen species. Increased amounts of myeloperoxidase were released in the blood of LPS-treated P2X1-/- mice, and circulating neutrophils and monocytes expressed higher levels of CD11b. Neutrophil accumulation into the lungs was also significantly augmented, as was lipid peroxidation in the liver. Desensitization of P2X1 ion channels led to increased activation of human neutrophils and enhanced formation of platelet-leukocyte aggregates. [less ▲]

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See detailATP-sensitive K+ channels activated by a quinolinone derivative
Becker, B.; Antoine, M. H.; Nguyen, Q. A. et al

Poster (2001, September)

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See detailATP-sensitive K+ channels and insulin release: effect of BPDZ 62
Lebrun, P.; Antoine, M.-H.; Ouedraogo, R. et al

in Diabetologia (1995), 38

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See detailATP-sensitive K+ channels and insulin release: effect of BPDZ 62
Lebrun, P.; Antoine, M. H.; Ouedraogo, R. et al

Poster (1995, September)

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