References of "1997"
     in
Bookmark and Share    
Peer Reviewed
See detailPolarization dependence of the exchange energy
Gonze, X.; Ghosez, Philippe ULg; Godby, R. W.

in Physical Review Letters (1997), 78(10), 2029-2029

Detailed reference viewed: 1 (0 ULg)
Peer Reviewed
See detailAnomalously large Born effective charges in cubic WO3
Detraux, F.; Ghosez, Philippe ULg; Gonze, X.

in Physical Review. B : Condensed Matter (1997), 56(3), 983-985

Within density-functional theory, we compute the Born effective charges of tungsten trioxyde in its reference cubic phase (defect-perovskite structure). For the tungsten atom, the effective charge tensor ... [more ▼]

Within density-functional theory, we compute the Born effective charges of tungsten trioxyde in its reference cubic phase (defect-perovskite structure). For the tungsten atom, the effective charge tensor is isotropic, with Z(W)*=+12.51. For the oxygen atoms, the two independent components of the tensor, corresponding, respectively, to a displacement of the atom parallel or perpendicular to the W-O bond, have the values Z(O parallel to)* = -9.13 and Z(O perpendicular to)* = -1.68. Z(W)* and Z(O parallel to)* are anomalously large with respect to the nominal ionic charges (+6 on W and -2 on O), but compatible with the Born effective charges found in related ABO(3)-perovskite compounds. [less ▲]

Detailed reference viewed: 34 (1 ULg)
Full Text
See detailLe traitement corticoïde dans les poussées de la maladie de Crohn de l'adulte
Belaiche, Jacques ULg; Louis, Edouard ULg

in Médecine et Hygiène (1997), 55

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailGenetic markers may predict disease behavior in patients with ulcerative colitis.
Roussomoustakaki, M.; Satsangi, J.; Welsh, K. et al

in Gastroenterology (1997), 112(6), 1845-53

BACKGROUND & AIMS: Recent studies have suggested that HLA DRB1*0103 and allele 2 of the interleukin 1 receptor antagonist (IL-1RA) gene predict severe and extensive ulcerative colitis, respectively. The ... [more ▼]

BACKGROUND & AIMS: Recent studies have suggested that HLA DRB1*0103 and allele 2 of the interleukin 1 receptor antagonist (IL-1RA) gene predict severe and extensive ulcerative colitis, respectively. The aim of this study was to test these hypotheses in patients undergoing surgery for their colitis. METHODS: HLA DRB1 and DQB1 genotyping was performed in 99 patients and 472 controls. Genotyping for polymorphisms of genes encoding tumor necrosis factor alpha and IL-1RA was performed in 107 patients and 89 controls. Measurement of antineutrophil cytoplasmic antibody (ANCA) was performed in 72 patients and 58 healthy subjects by fixed neutrophil enzyme-linked immunosorbent assay and indirect immunofluorescence. RESULTS: The DRB1*0103 allele was increased in patients (14.1% vs. 3.2% in controls; P < 1 x 10[-5]). This association was greatest in patients with extensive disease (15.8%; P < 0.0001) or extraintestinal manifestations (22.8%; P < 0.0001): mouth ulcers (25.8%; P < 0.0001), arthritis (27.2%; P < 0.0001), and uveitis (35.7%; P < 0.0001). The DRB1*04 alleles were reduced in patients (P = 0.005). Differences were noted between extensive and distal disease in the frequency of allele 2 of IL-1RA (10.9% in distal vs. 28.6% in extensive; P = 0.01) and allele 2 homozygosity. ANCA was detected in 76.4% of patients. Carriage of IL-1RA allele 2 and tumor necrosis factor 2 allele was increased in ANCA-positive patients. CONCLUSIONS: Genetic markers may predict disease behavior in ulcerative colitis. [less ▲]

Detailed reference viewed: 8 (0 ULg)
See detailDendrochronologie en Belgique et régions limitrophes
Houbrechts, David; Hoffsummer, Patrick ULg

in Archaeologia mediaevalis (1997), 20

Dendrochronological analyses by the Laboratory of CEA (ULg) are published for different towns: Attert (B), Bouillon (B), Dinant (B), Feulen (GDL), Gent (B), Liège (B), Luxembourg (GDL), Marloie (B ... [more ▼]

Dendrochronological analyses by the Laboratory of CEA (ULg) are published for different towns: Attert (B), Bouillon (B), Dinant (B), Feulen (GDL), Gent (B), Liège (B), Luxembourg (GDL), Marloie (B), Montquintin (B), Namur (B), Raversijde (B), Revin (F), Saint-Mard (B) and Wiesenbach (B) [less ▲]

Detailed reference viewed: 14 (5 ULg)
Peer Reviewed
See detailRectovaginal septum adenomyotic nodules: a series of 500 cases.
Donnez, Jacques; NISOLLE, Michelle ULg; Gillerot, Stépane et al

in British Journal of Obstetrics & Gynaecology (1997), 104(9), 1014-8

OBJECTIVE: Laparoscopic procedure with excision of deep fibrotic endometriotic nodules of the rectovaginal septum and histological study of the lesions. SETTING: An academic teaching hospital ... [more ▼]

OBJECTIVE: Laparoscopic procedure with excision of deep fibrotic endometriotic nodules of the rectovaginal septum and histological study of the lesions. SETTING: An academic teaching hospital. PARTICIPANTS: A series of 500 women undergoing laparoscopy for pelvic pain or infertility. RESULTS: Laparoscopic (n = 497) and laparotomic (n = 3) excision of endometriotic nodules resulted in considerable pain relief. Histologically the rectovaginal nodule was similar to an adenomyoma as it was a circumscribed nodular aggregate of smooth muscle and endometrial glands and stroma. The variations in oestrogen receptor and progesterone receptor content suggested a regulatory mechanism different from that of eutopic endometrium. CONCLUSION: This form of disease should be considered as an entity distinct from peritoneal and ovarian endometriosis, and originating from the Müllerian rests present in the rectovaginal septum. [less ▲]

Detailed reference viewed: 2 (0 ULg)
Peer Reviewed
See detailAlternative techniques of hysterectomy.
NISOLLE, Michelle ULg; Donnez, Jacques

in New England Journal of Medicine [=NEJM] (1997), 336(4), 291-2

Detailed reference viewed: 11 (2 ULg)
Full Text
See detailGenetics and Inflammatory Bowel Disease: From Association Studies to Wide Genome Screen
Louis, Edouard ULg; Belaiche, Jacques ULg

in Acta Gastro-Enterologica Belgica (1997), 60(3, Jul-Sep), 201-3

Detailed reference viewed: 9 (1 ULg)
Full Text
See detailSautour - Surice: notice explicative de la carte géologique de la Wallonie
Dumoulin, Virginie; Marion, Jean-Marc ULg

Book published by Ministère de la Région wallonne, DGRNE - Publication peer-reviewed (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 editions of Forir, published in 1899 at the ... [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 editions of Forir, published in 1899 at the scale of 1/40.000 by the "Commission Géologique de Belgique". Previously, the sheet "Sautour" of Dupont and Purves, has been published in 1885 at the scale of 1/20.000, by the "Musée Royal d'Histoire Naturelle de Belgique". [less ▲]

Detailed reference viewed: 53 (8 ULg)
Peer Reviewed
See detailLattice dynamics and ferroelectric instability of barium titanate
Ghosez, Philippe ULg; Gonze, X.; Michenaud, J. P.

in Ferroelectrics (1997), 194

Using first-principles calculations, we investigate the lattice dynamics of cubic and rhombohedral BaTiO3 and rye discuss the origin of the structural instability of this ferroelectric material. First, we ... [more ▼]

Using first-principles calculations, we investigate the lattice dynamics of cubic and rhombohedral BaTiO3 and rye discuss the origin of the structural instability of this ferroelectric material. First, we report results on the Born effective charges and the dielectric tensor and we emphasize the important reduction of these quantities in the ferroelectric phase, Then, the phonon frequencies at the Gamma point are calculated. We point out the similarity of theoretical eigenvectors in the cubic and rhombohedral phases. We examine the interaction of the vibration modes with the electric field and in particular the giant LO-TO splitting of the ferroelectric mode. Finally, separating the dipole-dipole interaction from the remaining short-range forces, we quantify the balance of forces leading to an unstable phonon in the cubic phase and we demonstrate its sensitivity to tiny effective charge changes. Within our decomposition, the stabilization of the unstable mode in the rhombohedral phase is produced by a reduction of the Born effective charges, while its stabilization under isotropic pressure is associated with a modification of the short-range forces. [less ▲]

Detailed reference viewed: 100 (3 ULg)
Full Text
Peer Reviewed
See detailPeritoneal endometriosis, ovarian endometriosis, and adenomyotic nodules of the rectovaginal septum are three different entities
NISOLLE, Michelle ULg; Donnez, Jacques

in Fertility and Sterility (1997), 68(4), 585-596

Objective: To review the histogenesis of peritoneal, ovarian, and rectovaginal endometriotic lesions. Design: The comparison of morphologic, morphometric, and histochemical data observed in each type of ... [more ▼]

Objective: To review the histogenesis of peritoneal, ovarian, and rectovaginal endometriotic lesions. Design: The comparison of morphologic, morphometric, and histochemical data observed in each type of lesion. Setting: A university hospital department of gynecology. Patient(s): Patients complaining of infertility or pelvic pain with laparoscopically proved endometriosis. Intervention(s): Laparoscopy was performed, and biopsy specimens from the endometriotic lesions were histologically studied. Result(s): Three types of endometriotic lesions must be considered: peritoneal, ovarian, and rectovaginal. Morphologic and morphometric data show similarities between eutopic endometrium and red peritoneal lesions, suggesting that these lesions are the first stage of early implantation of endometrial glands and stroma. After partial shedding, the red lesions regrow constantly. The shedding induces an inflammatory reaction, provoking scarification, and the lesions become black. The subsequent fibrosis leads to areas of white opacification that are inactive. The pathogenesis of ovarian endometriomas is a source of controversy. Although there seems to be a consensus concerning the invagination theory, there is still a contradiction between the implantation theory and the metaplasia theory. We recently showed that the mesothelium covering the ovary can invaginate into the ovarian cortex, pushing back the primordial follicles. The presence of mesothelial invagination in continuum with endometriotic tissue suggests that metaplastic histogenesis of ovarian endometriotic lesions occurs. Rectovaginal endometriotic nodules must be considered adenomyomas, consisting of smooth muscle with active glandular epithelium and scanty stroma. Immunocytochemical results show poor differentiation and hormonal independence of these lesions and indicate a close relation with their mesodermal müllerian origin. Conclusion(s): Peritoneal, ovarian and rectovaginal endometriotic lesions must be considered as three separate entities with different pathogeneses. [less ▲]

Detailed reference viewed: 21 (7 ULg)
Full Text
Peer Reviewed
See detailMechanisms of Hand Motor Recovery After Stroke: An Electrophysiologic Study of Central Motor Pathways
Bastings, Eric; Rapisarda, Giuseppe; Pennisi, Giovanni et al

in Journal of Neurologic Rehabilitation (1997), 11(2), 97-108

Detailed reference viewed: 23 (4 ULg)
Full Text
Peer Reviewed
See detailRégime et tactique alimentaires de la loutre (Lutra lutra) dans le Massif Central
Libois, Roland ULg

in Vie et milieu (1997), 47(1), 33-45

Otter spaints were collected in 1991 on a seasonal basis in the river Chavanon catchment, a tributary of the river Dordogne, in central France. Small sized species (bullhead, three-spined stickleback ... [more ▼]

Otter spaints were collected in 1991 on a seasonal basis in the river Chavanon catchment, a tributary of the river Dordogne, in central France. Small sized species (bullhead, three-spined stickleback, gudgeon and minnow) are the most numerous items in the diet: they account for more than 50% of the 3,148 identified preys. However, when expressed in relative biomass, their importance falls down (8 %). In fact, the brown trout, large cyprinid fish, birds and mammals make up the bulk of the diet. We found strong differences linked to the general habitat types and also seasonal ones. Frogs are mainly preyed upon during the spring whereas the snakes are exclusively taken in the summer and autumn months. Gudgeon and insects are also mainly summer and autumn preys. Perch and large cyprinid fish remais are more frequent during winter and even spring. The present results confirm the opportunistic way of predation of the otter and the fact that its hunting takes place more on the bottom and along the river banks than in the open water. [less ▲]

Detailed reference viewed: 54 (4 ULg)
Full Text
Peer Reviewed
See detailThe size of nanoparticles after their incorporation in gastroresistant spheroids
Duvivier, F; Grandfils, Christian ULg; Léonard, F et al

in Journal de Pharmacie de Belgique (1997), 52(3), 123

Detailed reference viewed: 10 (0 ULg)
See detailArcheologie du bâti: l'exemple des charpentes
Hoffsummer, Patrick ULg

in Archaeologia mediaevalis (1997), 20, 2

This presentation is to stimulate the interest to the study of roofs with building archaeology and dendrochronology

Detailed reference viewed: 22 (4 ULg)
Full Text
Peer Reviewed
See detailA novel seizure-induced synaptotagmin gene identified by differential display.
Babity, J. M.; Armstrong, J. N.; Plumier, Jean-Christophe ULg et al

in Proceedings of the National Academy of Sciences of the United States of America (1997), 94(6), 2638-41

Systemic administration of kainic acid, a cyclic analogue of glutamate, produces many of the clinical features of human temporal lobe epilepsy and status epilepticus in rats, including the induction of ... [more ▼]

Systemic administration of kainic acid, a cyclic analogue of glutamate, produces many of the clinical features of human temporal lobe epilepsy and status epilepticus in rats, including the induction of motor convulsions and the degeneration of neurons in the hippocampus and piriform cortex. Differential display PCR was used to identify mRNAs that are differentially expressed between degenerating and nondegenerating tissues in the brain after kainic acid-induced seizure activity. A novel cDNA fragment expressed in the degenerating hippocampus and piriform cortex, but not in the nondegenerating parietal cortex, was identified, cloned, and sequenced. This novel cDNA fragment identified a new member of the synaptotagmin gene family that is rapidly and transiently induced in response to seizure activity. Differential expression of this synaptotagmin gene, syt X, was confirmed by Northern blot analysis and in situ hybridization. This novel, inducible synaptotagmin gene may provide a direct link between seizure-induced neuronal gene expression and subsequent modulation of synaptic structure and function. [less ▲]

Detailed reference viewed: 13 (2 ULg)
Peer Reviewed
See detailSubtotal hysterectomy in patients with endometriosis--an option.
NISOLLE, Michelle ULg; Donnez, Jacques

in Fertility and Sterility (1997), 67(6), 1185-7

Detailed reference viewed: 17 (0 ULg)
Peer Reviewed
See detailEvaluation of pleural diseases with FDG-PET imaging: preliminary report.
Bury, Thierry ULg; Paulus, P; Dowlati, A et al

in Thorax (1997), 52(2), 187-9

BACKGROUND: Positron emission tomography (PET) with 18-fluorodeoxyglucose (FDG) is an accurate method for differentiating benign from malignant disease. The use of FDG-PET for the aetiological diagnosis ... [more ▼]

BACKGROUND: Positron emission tomography (PET) with 18-fluorodeoxyglucose (FDG) is an accurate method for differentiating benign from malignant disease. The use of FDG-PET for the aetiological diagnosis of pleural disease was investigated in 25 patients. METHODS: PET was performed on each subject before invasive procedures were used to determine the aetiological diagnosis. The PET data were analysed by visual interpretation of coronal, sagittal, and transverse slices. RESULTS: Sixteen patients were found to have malignant pleural disease and nine had benign disease. All patients with histologically confirmed malignant disease showed FDG uptake within the pleural thickening which was intense in 14 cases and moderate in two. PET imaging showed the absence of FDG uptake and correctly categorised seven non-malignant lesions. Two patients with infectious pleural diseases showed a localised and moderate FDG uptake. CONCLUSION: Our preliminary results suggest that FDG-PET could be an effective tool for differentiating between benign and malignant pleural diseases. [less ▲]

Detailed reference viewed: 4 (0 ULg)