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See detailMicrostructure design with generalized shape optimization based on level set geometrical description and XFEM
Qiu, Kepeng; Duysinx, Pierre ULg; Zhang, Wei-Hong et al

(2009, May)

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See detailMicrostructure development in isothermally melt-textured 123-211 composite materials
Auguste, F.; Rulmont, André ULg; Vandewalle, Nicolas ULg et al

in Journal of Low Temperature Physics (1996), 105(5-6), 1439-1444

Microstructures of isothermally melt-textured 123-211 composite materials have been examined during the solidification process from quenched specimens. The distribution of 211 particles, the ... [more ▼]

Microstructures of isothermally melt-textured 123-211 composite materials have been examined during the solidification process from quenched specimens. The distribution of 211 particles, the superconducting 123 grain boundary and the solid-liquid interface features are emphasized. The quality of the materials has been investigated by thermopower and thermal conductivity measurements. A seeded-melt texturing technique has been also tested in order to grow large single-domain of DyBa2Cu3O7-y. The chosen seed was a Dy2O3 single crystal. [less ▲]

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See detailMicrostructure of desert soil related to swelling behaviour
Marcoen, Jean Marie ULg; Tessier, D.; Zaczeck, Y.

in Ringrose-Voase, A. J.; Humphreys, G. S. (Eds.) Developments in soil Science 22, Soil Micromorphology : Studies in Management and Genesis (1994)

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See detailThe microstructure of hybrid silica gels and its modification by evaporative and supercritical dryings
Gommes, Cédric ULg; Blacher, Silvia ULg; Pirard, Jean-Paul ULg et al

in Journal of Sol-Gel Science and Technology (2007), 44(3), 211-218

The effect of evaporative drying on the pore size of two series of hybrid silica gels is investigated by combining beam bending on the gels and mercury porosimetry on the aerogels and xerogels with ... [more ▼]

The effect of evaporative drying on the pore size of two series of hybrid silica gels is investigated by combining beam bending on the gels and mercury porosimetry on the aerogels and xerogels with transmission electron microscopy on the xerogels. It is shown that the shrinkage of the pores during drying is different in the two series: in one series the pores shrink proportionally to their volume, in the other the pores collapse until they all reach the same size. The experimental data enable us to discuss the relation between these two different behaviours and the different morphology of the two series of gels. [less ▲]

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See detailMicrostructure, crystalline phases and pore morphology of Onggi
Pontikes, Yiannis; Kerckhofs, Greet ULg; Kim, Ungsoo et al

in Proceedings ECerS XII (2011)

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See detailMicrostructures and Mechanical Properties of Stainless Steel AISI 316L Processed by Selective Laser Melting
Mertens, Anne ULg; Reginster, Sylvie ULg; Contrepois, Quentin et al

in Materials Science Forum (2014), 783-786 (2014)

In this study, samples of stainless steel AISI 316L have been processed by selective laser melting, a layer-by-layer near-net-shape process allowing for an economic production of complex parts. The ... [more ▼]

In this study, samples of stainless steel AISI 316L have been processed by selective laser melting, a layer-by-layer near-net-shape process allowing for an economic production of complex parts. The resulting microstructures have been characterised in details in order to reach a better understanding of the solidification and consolidation processes. The influence of the processing parameters on the mechanical properties was investigated by means of uniaxial tensile testing performed on samples produced with different main orientations with respect to the building direction. A strong anisotropy of the mechanical behaviour was thus interpreted in relation with the microstructures and the processing conditions. [less ▲]

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See detailMicrostructures and nanostructures in long-term annealed AgPb18SbTe20 (LAST-18) compounds and their influence on the thermoelectric properties
Dadda, Jayaram; Mueller, Eckhard; Perlt, Susanne et al

in Journal of Materials Research (2011), 26(15), 1800-1812

This article reports on the role of annealing on the development of microstructure and its concomitant effects on the thermoelectric 18 lead-antimony-silver- tellurium, LAST-18) compounds. The annealing ... [more ▼]

This article reports on the role of annealing on the development of microstructure and its concomitant effects on the thermoelectric 18 lead-antimony-silver- tellurium, LAST-18) compounds. The annealing temperature was varied by applying a gradient annealing method, where a 40-mm-long sample rod was heat treated in an axial temperature gradient spanning between 200 and 600 degrees C for 7 days. Transmission electron microscopy investigations revealed Ag2Te nanoparticles at a size of 20-250 nm in the matrix. A remarkable reduction in the thermal conductivity to as low as 0.8W/mK was also recorded. The low thermal conductivity coupled with a large Seebeck coefficient of similar to 320 mu V/K led to high ZT of about 1.05 at 425 degrees C for the sample annealed at 505 degrees C. These results also demonstrate that samples annealed above 450 degrees C for long term are more thermally stable than those treated at lower temperatures. [less ▲]

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See detailMicrosys lab: R&D in the field of Microsystem and Packaging technology
Axisa, Fabrice ULg; Stoukatch, Serguei ULg

Scientific conference (2011, November 24)

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See detailMicrosystem array for live high voltage lines monitoring
Lilien, Jean-Louis ULg; Guerard, Suzanne ULg; Godard, Bertrand ULg et al

(2006, August)

The use of microsystems at very high electromagnetic fields on power lines to monitor movements.

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See detailMicrotextures of Fe-Ti oxide minerals in the South-Rogaland anorthositic complex (Norway)
Duchesne, Jean-Clair ULg

in Annales de la Société Géologique de Belgique (1970), 935

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See detailMicrotomographic investigation of a yeast grain porous structure
Debaste, Frédéric; Léonard, Angélique ULg; Halloin, Véronique et al

in Journal of Food Engineering (2010), 97

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See detailMicrotubule targeting agents: from biophysics to proteomics
Calligaris, David ULg; Verdier-Pinard, Pascal; Devred, François et al

in Cellular and Molecular Life Sciences : CMLS (2010), 67(7), 1089-1104

This review explores various aspects of the interaction between microtubule targeting agents and tubulin, including binding site, affinity, and drug resistance. Starting with the basics of tubulin ... [more ▼]

This review explores various aspects of the interaction between microtubule targeting agents and tubulin, including binding site, affinity, and drug resistance. Starting with the basics of tubulin polymerization and microtubule targeting agent binding, we then highlight how the three-dimensional structures of drug-tubulin complexes obtained on stabilized tubulin are seeded by precise biological and biophysical data. New avenues opened by thermodynamics analysis, high throughput screening, and proteomics for the molecular pharmacology of these drugs are presented. The amount of data generated by biophysical, proteomic and cellular techniques shed more light onto the microtubule-tubulin equilibrium and tubulin-drug interaction. Combining these approaches provides new insight into the mechanism of action of known microtubule interacting agents and rapid in-depth characterization of next generation molecules targeting the interaction between microtubules and associated modulators of their dynamics. This will facilitate the design of improved and/or alternative chemotherapies targeting the microtubule cytoskeleton. [less ▲]

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See detailMicrotubule-associated protein 1B: a neuronal binding partner for myelin-associated glycoprotein.
Franzen, Rachelle ULg; Tanner, Sandy; Dashiell, Suzanne et al

in Journal of Cell Biology (2001), 155

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See detailThe microtubule-associated protein doublecortin is broadly expressed in the telencephalon of adult canaries
Boseret, Géraldine ULg; Ball, G. F.; Balthazart, Jacques ULg

in Journal of Chemical Neuroanatomy (2007), 33(3), 140-154

The protein doublecortin (DCX) is expressed in post-mitotic migrating and differentiating neurons in the developing vertebrate brain and, as a part of the microtubule machinery, is required for neuronal ... [more ▼]

The protein doublecortin (DCX) is expressed in post-mitotic migrating and differentiating neurons in the developing vertebrate brain and, as a part of the microtubule machinery, is required for neuronal migration. DCX expression is generally maximal during embryonic and early post-natal life but decreases markedly and almost disappears in older animals in parallel with the major decrease or cessation of neurogenesis. In several seasonally breeding songbird species such as canaries, the volume of several song control nuclei in the brain varies seasonally such that the largest nuclei are observed in the late spring and early summer. This variation is based on changes in cell size, dendritic branching, and, in nucleus HVC, on the incorporation of neurons newly born in adulthood. Because songbirds maintain an active neurogenesis and neuronal incorporation in their telencephalon throughout their lives, we investigated here the distribution of DCX-immunoreactive (ir) structures in the brain of adult male canaries. Densely stained DCX-ir cells were found exclusively in parts of the telencephalon that are known to incorporate new neurons in adulthood, in particular the nidopallium. Within this brain region, the boundaries of the song control nucleus HVC could be clearly distinguished from surrounding structures by a higher density of DCX-ir structures. In most telencephalic areas, about two thirds of these cells displayed a uni- or bipolar fusiform morphology suggesting they were migrating neurons. The rest of the DCX-ir cells in the telencephalon were larger and had a round multipolar morphology. No such staining was found in the rest of the brain. The broad expression of DCX specifically in adult brain structures that exhibit the characteristic of active incorporation of new neurons suggests that DCX plays a key role in the migration of new neurons in the brain of adult songbirds as it presumably does during ontogeny. (c) 2007 Elsevier B.V. All rights reserved. [less ▲]

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See detailMicrowave Corneosurfametry and the Short-Duration Dansyl Chloride Extraction Test for Rating Concentrated Irritant Surfactants
Goffin, Véronique ULg; Pierard, Gérald ULg

in Dermatology : International Journal for Clinical & Investigative Dermatology (2001), 202(1), 46-8

BACKGROUND: There are ethical concerns to conduct in vivo tests in the animal and human to provide evidence that cosmetics and other topical products are safe. OBJECTIVE: To compare two methods, namely ... [more ▼]

BACKGROUND: There are ethical concerns to conduct in vivo tests in the animal and human to provide evidence that cosmetics and other topical products are safe. OBJECTIVE: To compare two methods, namely the short-duration dansyl chloride extraction test and the microwave corneosurfametry bioassay, to test the irritation potential of concentrated surfactant systems. METHODS: Five surfactants and water were tested using the in vivo test and the bioassay. RESULTS: A significant linear correlation was found between data yielded by the two procedures. CONCLUSION: The short-duration dansyl chloride extraction test and the microwave corneosurfametry bioassay provide similar information. The latter has the advantage of being safe. [less ▲]

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See detailMicrowave data and a regional climate model for studying the Greenland ice sheet surface mass balance over 1979-2009
Fettweis, Xavier ULg; Marco, Tedesco

Poster (2010, May 03)

Results (melt extent and winter accumulation) from an atmosphere-snow coupled regional climate model are compared with microwave brightness temperatures-derived estimates to study the surface mass balance ... [more ▼]

Results (melt extent and winter accumulation) from an atmosphere-snow coupled regional climate model are compared with microwave brightness temperatures-derived estimates to study the surface mass balance (SMB) changes over the Greenland ice sheet (GrIS) since 1979. Two simple algorithms are selected to retrieve the melt extent from the brightness temperatures. The first one is sensible to the production of surface meltwater as suggests the regional model and the second one is rather sensible to the presence of liquid water content into the snowpack. Both algorithms compare very well with model outputs and they are unanimous to show a significant increase of the surface melt over 1979-2009.We found also a good correlation between the March-April mean brightness temperatures and the simulated winter snow accumulation although no significant changes are found in both simulated and microwave-derived snow accumulation. The interannual variability of the brightness temperature-derived SMB components compare very well with the model results. This suggests that the variability of the model is reliable and that the model can be used to detect SMB changes over longer periods where no satellite data is available. Finally, both model and satellite agree to confirm the acceleration of the GrIS surface melting since 30 years. [less ▲]

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See detailMicrowave drying as an effective method to obtain porous carbon xerogels
Zubizarreta, Leire; Arenillas, Ana; Menendez, J. A. et al

in Journal of Non-Crystalline Solids (2008), 354(33), 4024-4026

Microwave drying was used to prepare resorcinol-formaldehyde aqueous gels, without performing any pretreatment, and to see whether it was possible to use this drying option to obtain porous carbon ... [more ▼]

Microwave drying was used to prepare resorcinol-formaldehyde aqueous gels, without performing any pretreatment, and to see whether it was possible to use this drying option to obtain porous carbon xerogels with controlled textural properties. By using microwave drying, the process for obtaining carbon gels is greatly simplified, textural properties are controlled likewise with other drying methods, but the time involved in the process is significantly reduced and no pretreatment is necessary. Therefore, microwave drying could help to simplify the carbon xerogels synthesis and reduce the associated costs. (C) 2008 Elsevier B.V. All rights reserved. [less ▲]

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See detailMicrowave improved synthesis of p-[18F]MPPF, 5-HT1A antagonist and PET sudies on cat brain.
Le Bars, D.; Ginovart, N.; Lemaire, Christian ULg et al

in Journal of Labelled Compounds & Radiopharmaceuticals (1997), 40

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See detailMicrowave properties of DyBCO monodomain in the mixed state and comparison with other RE-BCO systems
Pompeo, N.; Rogai, R.; Ausloos, Marcel ULg et al

in Physica C: Superconductivity and its Applications (2011), 471(21-22), 854-858

We report on microwave measurements on DyBa 2Cu 3O 7-δ monodomains grown by the top-seeded melt-textured technique. We measured the field increase of the surface resistance R s(H) in the a-b plane at 48.3 ... [more ▼]

We report on microwave measurements on DyBa 2Cu 3O 7-δ monodomains grown by the top-seeded melt-textured technique. We measured the field increase of the surface resistance R s(H) in the a-b plane at 48.3 GHz. Measurements were performed at fixed temperatures in the range 70 K-T c with a static magnetic field μ 0H < 0.8 T parallel to the c-axis. Low field steep increase of the dissipation, typical signature of the presence of weak links, is absent, thus indicating the single-domain behavior of the sample under study. The magnetic field dependence of R s(H) is ascribed to the dissipation caused by vortex motion. The analysis of X s(H) points to a free-flow regime, thus allowing to obtain the vortex viscosity as a function of temperature. We compare the results with those obtained on RE-BCO systems. In particular, we consider strongly pinned films of YBa 2Cu 3O 7-δ with nanometric BaZrO 3 inclusions. © 2011 Elsevier B.V. All rights reserved. [less ▲]

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See detailMicrowave – assisted synthesis of carbohydrate compounds, focus on uronic acid derivatives.
Laurent, Pascal ULg; Richel, Aurore ULg; Wathelet, Bernard ULg et al

Poster (2010, May)

At the moment, biorefining is increasingly seen as a promising alternative to petrochemical sector since it targets both the replacement of part of petroleum as a source of energy and the development of ... [more ▼]

At the moment, biorefining is increasingly seen as a promising alternative to petrochemical sector since it targets both the replacement of part of petroleum as a source of energy and the development of chemicals from the biomass, such as detergents, phytopharmaceutics, solvents, plastics, etc. The valorisation of carbohydrates arising from the hydrolysis of renewable feedstocks is therefore an area of outmost interest. In this context, uronic acids such as glucuronic acid (GlcA) or galacturonic acid (GalA) derived from widely available raw material such as hemicellulose or pectins represent important biocompatible and bioresorbable starting material. The quest of highly effective, environmentally friendly and straightforward chemical strategies to transform totally O-unprotected uronic acids into high valuable materials remains actually a particularly challenging task. A new strategy enabling the quantitative “one-pot” production of water-soluble monosubstituted D-glucofuranosidurono-6,3-lactones from unprotected D-glucuronic acid (D-GlcA) involving microwaves and an inexpensive siliceous-based promoter will be described. The use of a heterogeneous acid catalytic systems consisting of sulfuric acid impregnated onto silica (H2SO4/SiG60) or onto carbon (H2SO4/C), offers a green alternative to unrecyclable liquid sulfuric acid and permit the developpment of a truly eco-friendly green process, as these supported acids were readily separated from liquid products, without neutralization, by decantation or filtration, thus minimizing energy consumption and wastes. Faced with environmental concerns, this solventless methodology offers attractive features, including short reaction times, high yields and easy set-up and workup. [less ▲]

Detailed reference viewed: 142 (8 ULg)