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See detailMicroscopic Diffusion in Stellar Plasmas
Thoul, Anne ULg; Montalban Iglesias, Josefa ULg

in European Astronomical Society Publications Series (2007), 26

We review the basic equations describing the microscopic diffusion of elements in stars. We describe the two formalisms commonly used to describe a stellar plasma, i.e., the Chapman-Enskog method and the ... [more ▼]

We review the basic equations describing the microscopic diffusion of elements in stars. We describe the two formalisms commonly used to describe a stellar plasma, i.e., the Chapman-Enskog method and the Burgers equations. We point out the underlying assumptions about the physical state of the plasma itself. We briefly describe the different approximations which are often used to solve these equations, and discuss their validity. One of the major problems lies in the calculation of the collision integrals, and we discuss the different approaches to solving these integrals, emphasizing on their domain of validity. [less ▲]

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See detailMicroscopic identification of complex MC, M2C, M7C3, M6C and M23C6 carbides in high-speed steels
Tchuindjang, Jérôme Tchoufack ULg; Lecomte-Beckers, Jacqueline ULg

in Proceedings of The International Conference Joint Microscopic Meeting (2002)

High-speed steels (HSS) rolls are used in front finishing stands of hot strip mills. Good wear resistance and hardness at high temperature are defining features of HSS. Many types of carbides are present ... [more ▼]

High-speed steels (HSS) rolls are used in front finishing stands of hot strip mills. Good wear resistance and hardness at high temperature are defining features of HSS. Many types of carbides are present in these alloys, each having different effect upon the final properties of HSS. As a result, nature, morphology and amount of these carbides are factors of important concern. Identification and characterisation of HSS carbides were realised with optical microscopy combined with electron microscopy. [less ▲]

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See detailMicroscopic model of ferroelectricity in stress-free PbTiO3 ultrathin films
Ghosez, Philippe ULg; Rabe, K. M.

in Applied Physics Letters (2000), 76(19), 2767-2769

The ground-state polarization of PbTiO3 thin films is studied using a microscopic effective Hamiltonian with parameters obtained from first-principles calculations. Under short-circuit electrical boundary ... [more ▼]

The ground-state polarization of PbTiO3 thin films is studied using a microscopic effective Hamiltonian with parameters obtained from first-principles calculations. Under short-circuit electrical boundary conditions, (001) films with thickness as low as three unit cells are found to have a perpendicularly polarized ferroelectric ground state with significant enhancement of the polarization at the surface. (C) 2000 American Institute of Physics. [S0003- 6951(00)02119-7]. [less ▲]

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See detailMicroscopic morphology of chlorinated polyethylene nanocomposites synthesized from poly(e-caprolactone)/clay masterbatches
Brocorens, Patrick; Benali, Samira; Broekaert, Cedric et al

in Langmuir (2008), 24

Chlorinated polyethylene (CPE) nanocomposites were synthesized by melt blending clay-rich/poly( -caprolactone) (PCL) masterbatches to CPE matrices. The masterbatches were prepared following two synthetic ... [more ▼]

Chlorinated polyethylene (CPE) nanocomposites were synthesized by melt blending clay-rich/poly( -caprolactone) (PCL) masterbatches to CPE matrices. The masterbatches were prepared following two synthetic routes: either PCL is melt-blended to the clay or it is grafted to the clay platelets by in situ polymerization. The microscopic morphology of the nanocomposites was characterized by X-ray diffraction, atomic force microscopy, transmission electron microscopy, and modulated temperature differential scanning calorimetry. When using free PCL, intercalated composites are formed, with clay aggregates that can have micrometric dimensions and a morphology similar to that of the talc particles used as fillers in commercial CPE. PCL crystallizes as long lamellae dispersed in the polymer matrix. When using grafted PCL, the nanocomposite is intercalated/exfoliated, and the clay stacks are small and homogeneously dispersed. PCL crystallizes as lamellae and smaller crystals, which are localized along the clay layers. Thanks to the grafting of PCL to the clay platelets, these crystalline domains are thought to form a network with the clay sheets, which is responsible for the large improvement of the mechanical properties of these materials. [less ▲]

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See detailMicroscopic observation of the retinal photoreceptor layer of the common barbel (Teleostei: Cyprinidae)
Compère, Philippe ULg; Poncin, Pascal ULg

in Belgian Journal Of Zoology (1996), 126(1), 49-56

Light and electron microscopic observations show that cones-belonging to four types are present in the retina of the common barbel Barbus barbus (L.): short single cones, long single cones, twin cones ... [more ▼]

Light and electron microscopic observations show that cones-belonging to four types are present in the retina of the common barbel Barbus barbus (L.): short single cones, long single cones, twin cones, and unequal double cones. They do not exhibit any particular arrangement. Estimates of cone density suggest that the common barbel has multichromatic vision but of low acuity and that no difference exists between the lower and the upper parts of the retina. Both cone density (approximately 3000 units/mm(2)) and the proportion of double cones to single cones (approximately 1:3) are low. The view that the barbel has an inferior colour vision is in good agreement with the fact that this species is active mainly at twilight, but with diurnal activity during spawning. [less ▲]

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See detailMicroscopic picture of the critical state in a superconductor with a periodic array of antidots
Silhanek, Alejandro ULg; Gutierrez, J.; Kramer, R. B. G. et al

in Physical Review. B : Condensed Matter (2011), 83(2),

By using scanning Hall microscopy we visualize the progressive formation of the critical state with individual vortex resolution in a Pb thin film with a periodic pinning array. Slightly above the first ... [more ▼]

By using scanning Hall microscopy we visualize the progressive formation of the critical state with individual vortex resolution in a Pb thin film with a periodic pinning array. Slightly above the first penetration field, we directly observe a terraced critical state as proposed theoretically by Cooley and Grishin [Phys. Rev. Lett. 74, 2788 (1995)]. However, at higher fields, the flux front tends to disorder and the classical Bean profile is restored. This study allows us to establish a clear link between the widely used integrated response measurements in the superconducting state and the nanoscale landscape defined by individual vortices. [less ▲]

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See detailMICROSCOPIC RHEOLOGICAL MODELS AND EXTENDED IRREVERSIBLE THERMODYNAMICS
Dauby, Pierre ULg; Lebon, Georgy ULg

in Applied Mathematics Letters (1991), 4(6), 39-43

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See detailMicroscopic spectral density in random matrix models for chiral and diquark condensation
Vanderheyden, Benoît ULg; Jackson, A. D.

in Physical Review D (2003), 67(8), 085016

We examine random matrix models of QCD which are capable of supporting both chiral and diquark condensation. A numerical study of the spectral densities near zero virtuality shows that the introduction of ... [more ▼]

We examine random matrix models of QCD which are capable of supporting both chiral and diquark condensation. A numerical study of the spectral densities near zero virtuality shows that the introduction of color in the interactions does not alter the one-body results imposed by chiral symmetry. A model with three colors has the spectral density predicted for the chiral ensemble with a Dyson index beta=2; a pseudoreal model with two colors exhibits the spectral density of the chiral ensemble with beta=1. [less ▲]

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See detailA microscopic study of barium titanate
Ghosez, Philippe ULg; Gonze, X.; Michenaud, J. P.

in Ferroelectrics (1995), 164

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See detailMicroscopic study of equine oocyte maturation within quaternary follicles
Ponthier, Jérôme ULg; Beckers, Jean-François ULg; Deleuze, Stefan ULg

in Comptes Rendus de l'Académie Bulgare des Sciences = Proceeding of the Bulgarian Academy of Sciences (2009), 62(4), 491-498

In various species a relationship between oocyte maturity and morphological characteristics of oocytes has been established. To our knowledge, little attention has been paid to the immature oocyte aspect ... [more ▼]

In various species a relationship between oocyte maturity and morphological characteristics of oocytes has been established. To our knowledge, little attention has been paid to the immature oocyte aspect under light microscopy in the equine. The aim of the study is to give a general description and analysis of the microscopic parameters of immature oocytes. Follicles from abattoir ovaries are punctured after measurement of their diameter and their cumulus-oocyte complexes are recovered. Different characters such as oocyte diameter, cumulus aspect, granulosity and polarity of ooplasm are observed under light microscopy. No correlation between the estral activity, follicle maturity, cumulus cells aspect, polarity and granulosity of ooplasm was observed. The thickness of zona pellucida differs between oocytes with polar or nonpolar ooplasm. No correlation was observed between the follicle and oocyte diameter and none of the other studied parameters showed an influence on the oocyte diameter. Results show that no character of the observed oocytes under light microscopy can be related to the follicular origin or to any other character. Further studies have to be done to compare these immature oocytes with mature ones and to find the ultrastructural origin of the characters observed under light microscopy. [less ▲]

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See detailMicroscopic study of equine oocyte maturation within quaternary follicles.
Ponthier, Jérôme ULg; Beckers, Jean-François ULg; Deleuze, Stefan ULg

Conference (2009, February 19)

In various species a relationship between oocyte maturity and morphological characteristics of oocytes has been established. To our knowledge, immature oocyte aspect under light microscopy has been paid ... [more ▼]

In various species a relationship between oocyte maturity and morphological characteristics of oocytes has been established. To our knowledge, immature oocyte aspect under light microscopy has been paid little attention in the equine. The aim of the study is to give a general description and analyse microscopic parameters of immature oocytes. Follicles from abattoir ovaries are punctured after measurement of their diameter and their cumulus-oocyte complexes are recovered. Different characters such as oocyte diameter, cumulus aspect, granulosity and polarity of ooplasm are observed under light microscopy. No correlation between estral activity, follicle maturity, cumulus cells aspect, polarity and granulosity of ooplasm was observed. Thickness of zona pellucida differs between oocytes with polar or non polar ooplasm. No correlation was observed between follicle diameter and oocyte diameter and none of the other studied parameters showed an influence on oocyte diameter. Results show that no character of oocytes observed under light microscopy can be related to follicular origin or to any other character. Further studies have to be done to compare these immature oocytes with mature oocytes and to find the ultra-structural origin of characters observed under light microscopy. [less ▲]

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See detailMicroscopic techniques to study the interaction of new polymers within live cells
Smisdom, N.; Sanen, K.; Van Den Akker, N. et al

Poster (2013, June 19)

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See detailMicroscopie virtuelle appliquée à l'anatomie du bois
Jourez, Benoît ULg; Hérin, Michel; Gheysen, Thibaut ULg et al

Poster (2008, May 27)

La microscopie virtuelle est une approche innovante, complémentaire à la microscopie optique classique. Elle permet le traitement et la transmission d'images de coupes anatomiques digitalisées à très ... [more ▼]

La microscopie virtuelle est une approche innovante, complémentaire à la microscopie optique classique. Elle permet le traitement et la transmission d'images de coupes anatomiques digitalisées à très haute résolution. Les images peuvent être observées à l'écran, sous différents grossissements, mais aussi annotées et organisées en bases de données. Ce nouvel outil ouvert au dialogue et à l’auto-apprentissage est destiné à servir de support didactique dans le cadre de formations sur l'anatomie du bois. Le logiciel prévoit la sélection d’une coupe identifiée par l’essence et un plan ligneux dans une base de données accessible par Internet et organise la prospection de cette coupe selon différents grossissements. Au stade de développement actuel, le logiciel permet de se familiariser à la reconnaissance des plans ligneux de différentes essences forestières et met à la disposition de l'utilisateur divers outils interactifs. Il permet également à l'enseignant de pointer des éléments caractéristiques visibles à différents grossissements et d'y adjoindre des explications ou, a contrario, à pointer des éléments qui devront être identifiés par les étudiants. [less ▲]

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See detailMicroscopy and Particle Characterization
Grandfils, Christian ULg

Conference (2003, November 18)

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See detailMicrosequencing of three pregnancy-associated glycoproteins isolated from sheep placenta
El Amiri, Bouchra; Remy, Benoit; Melo de Sousa, Noelita ULg et al

in Proceedings of the 6e Journée de Rencontre Bioforum (2001)

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See detailMicrosoft Corp. contre Commission T-167/08, 27 juin 2012
Petit, Nicolas ULg

Scientific conference (2012, November 29)

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See detailLes microsphères d'acide polylactique comme matériels d'embolisation
Flandroy, P; Grandfils, Christian ULg

Conference (1990, May 28)

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See detailMicrospherophakia-Metaphyseal Dysplasia: A 'New' Dominantly Inherited Bone Dysplasia with Severe Eye Involvement
Verloes, Alain ULg; Van Maldergem, Lionel ULg; de Marneffe, Pierre et al

in Journal of Medical Genetics (1990), 27(7), 467-71

We report a father and son affected by a hitherto unpublished bone dysplasia with moderately severe dwarfism. On initial radiographs, thickening of the diaphyses of the long bones was striking. The small ... [more ▼]

We report a father and son affected by a hitherto unpublished bone dysplasia with moderately severe dwarfism. On initial radiographs, thickening of the diaphyses of the long bones was striking. The small bones of the extremities were almost unaffected. With age, the metaphyseal deformation became more prominent. The epiphyses became irregular and their growth was delayed (particularly the femoral heads). The femoral neck showed an unusual 'lip' on the inner edge. Later, the stubby appearance of the long bones faded and, in adulthood, only enlarged metaphyses and deformed femoral necks persisted. The vertebrae showed moderate deformation with irregular flattening, and narrowing of the spinal canal with a shortened interpedicular distance. The eye defects consisted of high grade myopia, microspherophakia, lens coloboma, lens luxation, and retinal detachment. The name 'microspherophakia-metaphyseal dysplasia' is suggested for this probably autosomal dominant bone dysplasia. [less ▲]

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