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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 ▲]

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See detailPeritoneal endometriosis: two-dimensional and three-dimensional evaluation of typical and subtle lesions.
Donnez, Jacques; NISOLLE, Michelle ULg; Casanas-Roux, Françoise

in Annals of the New York Academy of Sciences (1994), 734

Endometriosis most commonly affects the pelvic peritoneum close to the ovaries, including the uterosacral ligaments, the ovarian fossa peritoneum, and the perito- neum of the cul-de-sac. The increased ... [more ▼]

Endometriosis most commonly affects the pelvic peritoneum close to the ovaries, including the uterosacral ligaments, the ovarian fossa peritoneum, and the perito- neum of the cul-de-sac. The increased diagnosis of endometriosis at laparoscopy can be explained by the increased experience and ability of the surgeon to detect such subtle lesions. The greatest change has been in the case of “subtle” lesions, which increased from 15% in 1986 to 65% in 1988. The diagnosis of peritoneal endometriosis at the time of laparoscopy is often made by the observation of typically puckered black or bluish lesions. There are, in addition, numerous subtle appearances of peritoneal endometriosis. These lesions, frequently nonpigmented, were diagnosed as endometriosis following confirmation by biopsy by Jansen and Russell in 1986. [less ▲]

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See detailPeritoneal equilibration test with conventional ‘low pH/high glucose degradation product’ or with biocompatible ‘normal pH/low glucose degradation product’ dialysates: does it matter?
VAN OVERMEIRE, Lionel ULg; Goffin, Eric; Krzesinski, Jean-Marie ULg et al

in Nephrology Dialysis Transplantation (2013)

Abstract Background. The evaluation of the peritoneal transport characteristics is mandatory in peritoneal dialysis (PD) patients. This is usually performed in routine clinical practice with a peritoneal ... [more ▼]

Abstract Background. The evaluation of the peritoneal transport characteristics is mandatory in peritoneal dialysis (PD) patients. This is usually performed in routine clinical practice with a peritoneal equilibration test (PET) using conventional dialysates, with low pH and high glucose degradation product (GDP) concentrations. An increasing proportion of patients are now treated with biocompatible dialysates, i.e. with physiological pH and lower GDP concentrations. This questions the appropriateness to perform a PET with conventional solutions in those patients. The aim of our study is to compare the results of the PET using biocompatible and conventional dialysates, respectively. Methods. Nineteen stable PD patients (13 males, 6 females; mean age: 67.95 ± 2.36 years, mean body surface area: 1.83 ± 0.04 m2, dialysis vintage: 2.95 ± 0.19 years) were included, among which 10 were usually treated with biocompatible and 9 with conventional solutions. Two PETs were performed, within a 2-week interval, in each patient. PET sequence (conventional solution first or biocompatible solution first) was randomized in order to avoid ‘time bias’. Small (urea, creatinine and glucose), middle (beta-2-microglobulin) and large molecules’ (albumin and alpha-2-macroglobulin) dialysate/plasma (D/P) concentration ratios and clearances were measured during each PET. Ultrafiltration (UF) and sodium filtration were also recorded. Results of both tests were compared by the Wilcoxon paired test. Results. No statistical difference was found between both dialysates for small molecule transport rates or for sodium filtration and UF. However, a few patients were not similarly classified for small-solute transport characteristics within the PET categories. Beta-2-microglobulin and albumin D/P ratios at different time points of the PET were significantly higher with the biocompatible, when compared with the conventional, solutions: 0.10 ± 0.03 versus 0.08 ± 0.02 (P < 0.01) and 0.008 ± 0.003 versus 0.007 ± 0.003 (P = 0.01), respectively. A similar difference was also observed for beta-2-microglobulin that was higher with biocompatible dialysates (1.04 ± 0.32 versus 0.93 ± 0.32 mL/min, respectively). Conclusion. Peritoneal transport of water and small solutes is independent of the type of dialysate which is used. This is not the case for the transport of beta-2-microglobulin and albumin that is higher under biocompatible dialysates. Vascular tonus modification could potentially explain such differences. The PET should therefore always be carried out with the same dialysate to make longitudinal comparisons possible. [less ▲]

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See detailPeritoneal trypsin level in equine acute abdominal disease.
Grulke, Sigrid ULg; Gueret, Patricia; Gangl, Monika et al

Conference (2002, July)

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See detailPeriungual lipoma: About three cases
Richert, Bertrand ULg; André, J.; Choffray, Alexandre ULg et al

in Journal of the American Academy of Dermatology (2004), 51(2 Suppl), 91-93

Lipomas are one of the most common benign soft tissue tumors. The usual development sites are the neck, the torso, and the legs. Lipomas of the nail unit are extremely rare. Only five cases have been ... [more ▼]

Lipomas are one of the most common benign soft tissue tumors. The usual development sites are the neck, the torso, and the legs. Lipomas of the nail unit are extremely rare. Only five cases have been reported tip to now. four in subungual locations and one in the lateral nail fold. We report three cases of peri-Lingual lipomas, one on the digit and two on the toes. Two of them exhibited the histological features of perisudoral lipomas. [less ▲]

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See detailLa périurbanisation résidentielle en Belgique à la lumière des contextes suisse et danois: enracinement, dynamiques centrifuges et régulations collectives
Halleux, Jean-Marie ULg; Bruck, L.; Mairy, N.

in Belgeo (2002), (4), 333-354

Par rapport à ses voisins européens, la Belgique apparaît marquée par une périurbanisation à la fois plus importante et plus éclatée, ce dont résultent sans conteste de nombreux accrochages par rapport ... [more ▼]

Par rapport à ses voisins européens, la Belgique apparaît marquée par une périurbanisation à la fois plus importante et plus éclatée, ce dont résultent sans conteste de nombreux accrochages par rapport aux principes stratégiques du développement durable. Le présent article se propose d’étudier les causes de l’éclatement urbain qui affecte le territoire belge à la lumière d’une comparaison avec la Suisse et le Danemark, deux pays réputés pour avoir mis sur pied des politiques relativement efficaces de lutte contre l’étalement urbain. De cette comparaison appréhendée via les trois thématiques de la politique foncière, de la production immobilière résidentielle et du choix clair de la Belgique en faveur de la mobilité voiture, c’est l’enracinement profond de la périurbanisation belge qui apparaît. L’éclatement urbain qui y affecte le territoire s’intègre, en effet, dans une grappe de facteurs explicatifs où s’entremêlent l’influence du milieu naturel, des réticences séculaires pour les modes de vie urbains, une faible conscientisation aux enjeux de la planification physique et des choix politiques rémanents ayant fortement contribué au renforcement des dynamiques centrifuges. [less ▲]

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See detailPerivascular cuff and spread of Treponema pallidum.
Quatresooz, Pascale ULg; Pierard, Gérald ULg

in Dermatology : International Journal for Clinical & Investigative Dermatology (2009), 219(3), 259-62

BACKGROUND: The incidence of syphilis is on the rise in many cities worldwide. Both the clinical and histopathological changes do not always fulfil the typical diagnostic criteria. Immunohistochemistry is ... [more ▼]

BACKGROUND: The incidence of syphilis is on the rise in many cities worldwide. Both the clinical and histopathological changes do not always fulfil the typical diagnostic criteria. Immunohistochemistry is available to identify and localize Treponema pallidum. Two main patterns of T. pallidum distribution were described in the skin, namely heavy intraepidermal infiltration and scattered pattern inside the lichenoid cell infiltrate. OBJECTIVE: To search for a third pattern consistent with dissemination of the disease. METHODS: Immunohistochemistry using an antispirochete (T. pallidum and Borrelia) antibody was used in all cases of syphilis submitted to our laboratory. In addition, deposits of immunoglobulins and complement indicative of immune complexes were searched for. RESULTS: According to the cases, T. pallidum was disclosed in a combination of three patterns. The previously described epidermal and lichenoid patterns were confirmed, and a third pattern predominating in a perivascular location throughout the dermis was clearly identified in primary syphilis. The microorganisms were abundant in extracellular and intracellular locations, particularly inside endothelial cells. No deposits of immunoglobulins and complement were disclosed. CONCLUSION: The perivascular cuff of T. pallidum throughout the dermis might be representative of the dissemination phase of T. pallidum. [less ▲]

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See detailPeriventricular haemorrhage and white matter lesions in babies born below 1 kg
Battisti, Oreste ULg; Danhaive, O.; Detry, J. et al

Conference (1991)

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See detailPERK IS REQUIRED AT THE ER-TO-MITOCHONDRIA CONTACT SITES TO CONVEY APOPTOSIS FOLLOWING ROS-MEDIATED ER STRESS
VERFAILLIE, T; RUBIO, N; GARG, A et al

in Cell Death & Differentiation (2012), 19

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See detailLes perles de l’Ourthe
Fredericq, Léon ULg

in Bulletin de la Société Royale Le Vieux-Liège (1933)

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See detailLes perles en verre de la nécropole de Bossut–Gottechain : recettes et fabrication
Mathis, François ULg; Vrielynck, Olivier; Leroy, Amandine et al

Conference (2013, April)

La nécropole de Bossut Gottechain est une des plus grandes nécropoles mérovingiennes jamais trouvée en Belgique. Les fouilles conduites entre 2002 et 2006 ont permis de mettre au jour 436 tombes sur une ... [more ▼]

La nécropole de Bossut Gottechain est une des plus grandes nécropoles mérovingiennes jamais trouvée en Belgique. Les fouilles conduites entre 2002 et 2006 ont permis de mettre au jour 436 tombes sur une période d’occupation s’étalant de 470 à 670 ap J.C. Ces tombes contenaient un matériel funéraire important composé d’armes, d’accessoires de vêtement, de récipients en céramique, en métal et en verres, et de bijoux parmi lesquels une quantité inhabituellement importante de perles. Plus de 8000 spécimens ont été retrouvés, la majorité en verre (environ 6800 soit 82% du corpus), mais aussi en ambre, pierre, céramique ou métal. L’abondance de ce matériel et la datation fine de ce site ont permis de dresser une typo-chronologie précise de cette production affinant la description des types et des périodes d’utilisation déjà connus. Nous avons voulu en plus de l’étude purement archéologique de ces perles porter une attention particulière au matériau qui les compose. Une campagne d’analyse physico-chimique a donc été engagée. La méthode choisie a été la spectroscopie PIXE- PIGE en faisceau extrait, cette méthode d’analyse non invasive et très sensible aux éléments légers étant particulièrement adaptée à notre corpus d’objets nombreux mais précieux. Ces analyses ont été conduites sur la ligne de faisceau extrait ARCHEO de l’accélérateur de l’Institut de Physique Nucléaire, Atomique et de Spectroscopie de l’université de Liège. Nous avons pu analyser plus de trois cent perles. Une attention particulière a été portée sur les perles en verres jaune et noire, abondamment représentées dans le corpus, ainsi que sur plusieurs perles dont le type rare ou unique sur le site nous interrogeait. Les résultats de cette recherches ont été particulièrement fructueux car nous avons pu mettre en exergue la pratique connue du remploi de perles en verre romain ou protohistorique à l’époque mérovingienne, et confirmer le changement de recettes d’opacifiant/colorant dès le tout début de la période mérovingienne où l’utilisation d’oxydes d’étain ou de stannates de plomb est généralisée et celle des antimoniates complètement abandonnée. Enfin nous avons pu mettre en évidence l’utilisation d’un verre très riche en plomb pour la fabrication de perles noires dès le début de la période d’occupation du site, verre qui à notre connaissance n’a jamais été documenté [less ▲]

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See detailPerméabilité au gaz et aux ions chlore des mortiers à base de laitier de faible hydraulicité
Hadj Sadok, Ahmed; Kenaï, Saïd; Courard, Luc ULg

in Innovation et Valorisation dans le génie civil et les matériaux de construction (2011)

La durabilité des bétons au laitier de haut fourneau dépend fortement de l’activité hydraulique du laitier. Dans cette étude, un laitier algérien, caractérisé par une faible hydraulicité, est utilisé dans ... [more ▼]

La durabilité des bétons au laitier de haut fourneau dépend fortement de l’activité hydraulique du laitier. Dans cette étude, un laitier algérien, caractérisé par une faible hydraulicité, est utilisé dans la fabrication de mortiers comme substituant du ciment à des taux de 0, 30 et 50%. En plus d’une caractérisation mécanique, l’effet du laitier sur la durabilité des mortiers est évalué par des essais de perméabilité à l’oxygène, de diffusion de chlorures en régime permanent ainsi que de conduction des ions chlore (essai accéléré ASTM). Les résultats montrent, malgré une faible réactivité du laitier, une amélioration de la perméabilité à l’oxygène à long terme (360 jours) pour les mortiers au laitier, particulièrement pour un taux de 50%. La présence du laitier réduit la perméabilité aux ions chlore, d’une part, en augmentant le temps de passage des chlorures à travers le mortier et, d’autre part, en diminuant le taux de diffusion. Par ailleurs, une faible conduction des chlorures est observée pour les mortiers au laitier, montrant une similitude avec les résultats d’essai de diffusion en régime permanent. [less ▲]

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See detailPermeability of the Endothelium and Partitioning of the Pulmonary Blood Flow Resistance in Isolated Perfused Pig Lungs: Effects of Breed and Age
Gustin, Pascal ULg; Urbain, B.; Delaunois, Annie et al

in Veterinary Research Communications (1992), 16(1), 69-82

The right and left lungs of 5 healthy Minipigs and of 13 healthy Landrace piglets were isolated, perfused at constant pressure and maintained in an isogravimetric state under zone III conditions ... [more ▼]

The right and left lungs of 5 healthy Minipigs and of 13 healthy Landrace piglets were isolated, perfused at constant pressure and maintained in an isogravimetric state under zone III conditions (pulmonary venous pressure greater than alveolar pressure). By applying the double, arterial and venous, occlusion technique, the total blood flow resistance (R) was partitioned into four components: arterial (Ra), pre- (Ra') and post-capillary (Rv') and venous (Rv). The capillary filtration coefficient (Kf,c) was evaluated by measuring the weight gained by the lungs when the arterial and venous pressures were suddenly increased. In the youngest Landrace piglets (5 weeks old), there was an uncontrolled vasoconstriction which sometimes prevented perfusion of the lungs and induced a large increase in Rt. These high values of Rt were decreased by tolazoline administration. The values of Rt recorded in older pigs (12-13 weeks old) were lower in Minipigs (33.66 +/- 3.77 cmH2O min L-1 per 100 g of lungs; n = 5) than in Landrace piglets (55.20 +/- 6.18 cmH2O min L-1 per 100 g; n = 5). This breed difference was due to the differences in Ra' and Rv'. The mean values of Kf,c were 0.193 +/- 0.015 and 0.202 +/- 0.029 ml min (cmH2O)-1 per 100 g of the lungs in Minipigs and Landrace piglets respectively. All these parameters were stable for the 3 hours following the equilibrium period. It was concluded that: (1) There is an age-related maturation of the control of the vasomotor tone in porcine lungs. (2) Pulmonary microvascular haemodynamics are influenced by the breed of the pigs. (3) There was no difference in the Kf,c values between both the breeds. (4) A comparison of the values reported for dogs and rabbits with our data shows that the pre- and post-capillary resistances and, to a lesser extent, the arterial and venous resistances are relatively high in pigs [less ▲]

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See detailPermeable Wall Boundary Conditions For Transonic Airfoil Design
Léonard, Olivier ULg; Van den Braembussche, R. A.

in Proceedings od the First European Computational Fluid Dynamics Conference (1992)

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See detailPermeable Wall Concept for Transonic Blade Design
Léonard, Olivier ULg; Demeulenaere, Alain; Van den Braembussche, René

in Proceedings of the 3rd Belgian National Congress on Theoretical and Applied Mechanics (1994)

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See detailThe permease gene nagE2 is the key to N-acetylglucosamine sensing and utilization in Streptomyces coelicolor and is subject to multi-level control
Nothaft, Harald; Rigali, Sébastien ULg; Boomsma, B. et al

in Molecular Microbiology (2010), 75((5)), 1133-44

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See detailPermian
Mc Cann, T.; Kiersnowski, H.; Krainer, K. et al

in Mc Cann, Tom (Ed.) The geology of Central Europe: Precambrian and Palaeozoic (2008)

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