Fatal Mural Endocarditis and Cutaneous Botryomycosis after Heart Transplantation

in American Journal of Dermatopathology (1997), 19(6), 602-5

Fatal mural endocarditis and botryomycosis occurred concurrently in a 62-year-old women 4 months after orthotopic heart transplantation. Subsequent to mild mitral regurgitation, infection developed on a ... [more ▼]

Fatal mural endocarditis and botryomycosis occurred concurrently in a 62-year-old women 4 months after orthotopic heart transplantation. Subsequent to mild mitral regurgitation, infection developed on a left atrial thrombus and was complicated by cerebral embolization. Simultaneously, skin nodules manifested on both forearms. Histologic examination revealed typical aspects of early evolving botryomycosis with massive infiltration of the dermis and hypodermis by necrotic granulomas framed by grains of Gram-positive coccoid forms. Bacteria were decorated by a nonspecific polyclonal antibody to Mycobacterium bovis. [less ▲]

Morphological alterations of blood platelets induced by Platelet Activating Factor (PAF) and partial inhibition by Ketoprofen in calves

in Veterinary Research (1997), 28(5 Sep-Oct), 489-502

The influence of platelet activating factor (PAF) was investigated in vivo on the ultrastructure of bovine platelets, and on the platelet count. The effect of an intravenous administration of ketoprofen ... [more ▼]

The influence of platelet activating factor (PAF) was investigated in vivo on the ultrastructure of bovine platelets, and on the platelet count. The effect of an intravenous administration of ketoprofen (a non-steroidal anti-inflammatory drug) pretreatment followed by PAF infusion was also observed in a group of six healthy male Friesian calves. PAF infusion alone caused a moderate thrombocytopenia, which peaked one minute post challenge and returned to levels not significantly different from control after 30 min. Electron microscopy revealed that after PAF infusion, platelets lost their lentiform shape and became irregular, with many pseudopods. Their microtubules became impossible to distinguish. The numbers of alpha granules and dense bodies were significantly decreased. Glycogen particles became rare or even disappeared. Giant platelets occasionally appeared. The Golgi apparatus was more often visible and the number of mitochondria was significantly increased. Ketoprofen pretreatment lowered PAF-induced thrombocytopenia and decrease in the number of dense bodies. Under these conditions, the Golgi apparatus was rarely visible and giant platelets were not observed. These results showed that the morphological ultrastructure of blood platelets in bovines were modified following PAF infusion and that ketoprofen pretreatment before PAF infusion provided partial protection, limiting the extent of the morphological alterations and maintaining a normal platelet count [less ▲]

SIME: A hybrid approach to fast transient stability assessment and contingency selection

in International Journal of Electrical Power & Energy Systems (1997), 19(3), 195-208

We propose an integrated scheme for transient stability assessment which in a sequence screens contingencies and scrutinizes only the selected ones. This scheme is based on a hybrid method, called SIME ... [more ▼]

We propose an integrated scheme for transient stability assessment which in a sequence screens contingencies and scrutinizes only the selected ones. This scheme is based on a hybrid method, called SIME for Single Machine Equivalent. SIME relies on a particular direct method coupled with time-domain programs so as to combine the strengths of both, namely: the flexibility with respect to power system modelling of time-domain methods; the speed and richer information of the direct method. This paper lays the foundations of SIME, devises appropriate techniques for transient stability assessment per se and for contingency screening, and finally integrates these two techniques in a fully general function, i.e. able to comply with any power system modelling and stability scenario, and to assess any type of stability limits (critical clearing times or power limits). Throughout, real-world examples illustrate the proposed techniques and highlight their performances. [less ▲]

GOSPEL - The Chicago Sound

Article for general public (1997)

L'écriture en action. Étude de la poésie visuelle chez Paul Nougé

Master's dissertation (1997)

Carte géologique de Wallonie échelle 1/25.000, Silenrieux - Walcourt 52/7-8

Cartographic material (1997)

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced, since the previous edition of Mourlon and Bayet, published in 1899 ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced, since the previous edition of Mourlon and Bayet, published in 1899 at the scale of 1/40.000 by the "Commission Géologique de Belgique". [less ▲]

Création et institution chez Cornelius Castoriadis

Master's dissertation (1997)

In vivo binding of [F-18]altanserin to rat brain 5HT(2) receptors: A film and electronic autoradiographic study

in Nuclear Medicine and Biology (1997), 24(4), 357-360

To further validate its use in positron emission tomography (PET), we studied the binding of [18F]altanserin, a specific 5HT2 radioligand, in the rat brain using in vivo autoradiography. Distribution of ... [more ▼]

To further validate its use in positron emission tomography (PET), we studied the binding of [18F]altanserin, a specific 5HT2 radioligand, in the rat brain using in vivo autoradiography. Distribution of [18F]altanserin binding was comparable to the in vitro mapping of 5HT2 receptors reported in the literature. Selective displacers were used to test the reversibility and the selectivity of this radioligand. Specific binding of [18F]altanserin in the rat frontal cortex was quantified by direct counting with an electronic imaging system and by quantification on digitalized autoradiograms. Close results of about 30 pmol/g were obtained with both methods. Our data confirmed that [18F]altanserin is a valid tracer for 5HT2 receptors binding studies. [less ▲]

Species assemblages and indicator species: The need for a flexible asymmetrical approach

in Ecological Monographs (1997), 67(3), 345-366

This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative ... [more ▼]

This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative abundance with its relative frequency of occurrence in the various groups of sites. This index is maximum when all individuals of a species are found in a single group of sites and when the species occurs in all sites of that group; it is a symmetric indicator. The statistical significance of the species indicator values is evaluated using a randomization procedure. Contrary to TWINSPAN, our indicator index for a given species is independent of the other species relative abundances, and there is no need to use pseudospecies. The new method identifies indicator species for typologies of species releves obtained by any hierarchical or nonhierarchical classification procedure; its use is independent of the classification method. Because indicator species give ecological meaning to groups of sites, this method provides criteria to compare typologies, to identify where to stop dividing clusters into subsets, and to point out the main levels in a hierarchical classification of sites. Species can be grouped on the basis of their indicator values for each clustering level, the heterogeneous nature of species assemblages observed in any one site being well preserved. Such assemblages are usually a mixture of eurytopic (higher level) and stenotopic species (characteristic of lower level clusters). The species assemblage approach demonstrates the importance of the 'sampled patch size,' i.e., the diversity of sampled ecological combinations, when we compare the frequencies of core and Satellite species. A new way to present species-site tables, accounting for the hierarchical relationships among species, is proposed. A large data set of carabid beetle distributions in open habitats of Belgium is used as a case study to illustrate the new method. [less ▲]

Brain Tumours in Children: Experience of the Paediatric Department University of Liège

in European Journal of Neurology (1997), 1(2/3), 174