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Peer Reviewed
See detailLa péricardite tuberculeuse: intérêt du dosage de l'activité de l'adénosine déaminase
Letiexhe, Michel ULg; Pierard, Luc ULg; Kulbertus, Henri ULg

in Revue Médicale de Liège (1992), 47(10), 502-9

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See detailPericopsis elata (Harms) Meeuwen in Cameroon: Ecological Check-up of an Endangered Timber Species
Bourland, Nils ULg; Kouadio, Yao Lambert; Lejeune, Philippe ULg et al

Poster (2012, June 20)

Pericopsis elata (Fabaceae – assamela, afrormosia, kokrodua) is a high valued timber species of the moist semi deciduous African forests. Because of logging which started more than 50 years ago, it is ... [more ▼]

Pericopsis elata (Fabaceae – assamela, afrormosia, kokrodua) is a high valued timber species of the moist semi deciduous African forests. Because of logging which started more than 50 years ago, it is considered as threatened and included on both IUCN Red List and CITES Appendix II. Nevertheless, there is still little information available on the species ecology: essential biological parameters controlling its population dynamics remain unknown. Our study first aims at improving the knowledge of its main ecological parameters, then at assessing the impact of selective logging on its populations in a forest management unit in Cameroon (ca 120,000 ha). After inventorying the species (sampling rate of 1.2%), mortality and growth were assessed over continuous 5 and 2-year periods in unlogged and logged areas, respectively. Phenology was monitored in the unlogged forest during 5 years (leaf shedding and flushing, flowering, ripe and unripe fruiting). The population structure followed a bell-shaped curve. Mean annual diameter increments in both environments did not differ significantly between unlogged and logged areas (0.29±0.06 0.31±0.04 cm for unlogged and logged areas, respectively). P. elata is a deciduous species that flowers at the end of the main dry season (Marsh-April). The minimum reproduction and effective flowering diameters were, respectively, 32 and 37 cm. Fruit maturation took place during 7 months (the seed rain occurs in December-January), but all unripe fruits abort 3 years out of 5. With a minimum logging diameter of 90 cm, the recovery rate computed over a 30-year period was greater than 100%. Selective logging harvested only 12.1% of the total number of seed trees and had little influence on the species biological parameters. Securing sufficient regeneration as a post-logging action is probably the most important consideration for achieving long-term sustainability. [less ▲]

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See detailPericopsis elata (Harms) Meeuwen in southeastern Cameroon: ecological and pedological approaches to improve the management of an endangered commercial timber species
Bourland, Nils ULg; Kouadio, Yao Lambert; Colinet, Gilles ULg et al

in International Forestry Review (2010), 12(5), 111

Pericopsis elata (gregarious Fabaceae), a moist semi-deciduous hardwood logged in Central African forests, is on the IUCN Red List and in CITES Appendix II. Our study evaluated its main ecological and ... [more ▼]

Pericopsis elata (gregarious Fabaceae), a moist semi-deciduous hardwood logged in Central African forests, is on the IUCN Red List and in CITES Appendix II. Our study evaluated its main ecological and pedological parameters in Cameroon. We obtained a mean diameter increment of 0.32 ± 0.04 cm.year–1. Minimum fertile and effective fruiting diameters were 32 and 35 cm, respectively. Flowering started in March-April, and fruits ripened over 7 months. Seed rain was studied in 1 × 45 m cleared corridors in each cardinal direction around 4 isolated mother trees. Indehiscent pods (average weight: 131.6 ± 10.1 cg) were dispersed mainly to the west: 86% of the variation of the number of collected fruits could be explained by the distance to the mother tree and the direction (GLM analysis, p < 0.001). The proportion of seeds eaten by insect larvae depended on the mother tree (10–95% – χ2 test, p < 0.001). Soils were compared at a regional scale: soils with P. elata contain higher levels of C (2.2 ± 0.5 SD- g.100g–1), Fe (261 ± 83 mg.kg–1), and P (33 ± 10 mg.kg–1), and were more acidic (pH 4.0 ± 0.2). A planting method in logging gaps is currently being tested taking into account physicochemical soil parameters [less ▲]

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See detailPericyte requirement for anti-leak action of angiopoietin-1 and vascular remodeling in sustained inflammation
Fuxe, J.; Tabruyn, Sébastien ULg; Colton, K. et al

in American Journal of Pathology (2011), 178(6), 2897-909

Blood vessel leakiness is an early, transient event in acute inflammation but can also persist as vessels undergo remodeling in sustained inflammation. Angiopoietin/Tie2 signaling can reduce the leakiness ... [more ▼]

Blood vessel leakiness is an early, transient event in acute inflammation but can also persist as vessels undergo remodeling in sustained inflammation. Angiopoietin/Tie2 signaling can reduce the leakiness through changes in endothelial cells. The role of pericytes in this action has been unknown. We used the selective PDGF-B-blocking oligonucleotide aptamer AX102 to determine whether disruption of pericyte-endothelial crosstalk alters vascular leakiness or remodeling in the airways of mice under four different conditions: i) baseline, ii) acute inflammation induced by bradykinin, iii) sustained inflammation after 7-day infection by the respiratory pathogen Mycoplasma pulmonis, or iv) leakage after bradykinin challenge in the presence of vascular stabilization by the angiopoietin-1 (Ang1) mimic COMP-Ang1 for 7 days. AX102 reduced pericyte coverage but did not alter the leakage of microspheres from tracheal blood vessels at baseline or after bradykinin; however, AX102 exaggerated leakage at 7 days after M. pulmonis infection and increased vascular remodeling and disease severity at 14 days. AX102 also abolished the antileakage effect of COMP-Ang1 at 7 days. Together, these findings show that pericyte contributions to endothelial stability have greater dependence on PDGF-B during the development of sustained inflammation, when pericyte dynamics accompany vascular remodeling, than under baseline conditions or in acute inflammation. The findings also show that the antileakage action of Ang1 requires PDGF-dependent actions of pericytes in maintaining endothelial stability. [less ▲]

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Peer Reviewed
See detailPeridontitis as a potential risk factor for coronary heart disease and stroke
Geerts, Sabine ULg; Legrand, Victor; Rompen, Eric ULg

Poster (1997)

Detailed reference viewed: 12 (1 ULg)
See detailLe "péril jaune" en RDC : mythe ou réalité ?
Wintgens, Sophie ULg; Kabamba, Bob ULg

in Santander, Sébastian (Ed.) L’Afrique, nouveau terrain de jeu des émergents (2014)

L’influence de la Chine en république démocratique du Congo (RDC) se caractérise par son caractère tardif mais fulgurant, au regard d’une présence chinoise historiquement forte en Afrique subsaharienne ... [more ▼]

L’influence de la Chine en république démocratique du Congo (RDC) se caractérise par son caractère tardif mais fulgurant, au regard d’une présence chinoise historiquement forte en Afrique subsaharienne. Son implantation offensive en RDC résulte d’une convergence d’intérêts entre un État chinois en quête de matières premières et de terres arables pour assurer son développement économique et sa stabilité politique, et un État congolais en (re)construction résolument acquis, depuis l’élection du président Joseph Kabila, au modèle de développement chinois fondé sur la séparation volontaire entre objectifs économiques et réformes politiques (prêts inconditionnés, aide déliée). En consacrant l’accroissement rapide des relations commerciales sino-congolaises, le partenariat stratégique Chine-Afrique, scellé en 2006 lors du troisième Forum de coopération sino-africain, participe plus largement de la remise en cause du rôle des puissances traditionnellement influentes dans la région. Au-delà de la concurrence économique induite vis-à-vis des États-Unis, du Japon et des institutions financières internationales au sein desquelles elle est largement représentée, l’Europe assiste plus singulièrement à la remise en question de son leadership régional et à la dépréciation normative de sa politique développementale. Entre émancipation et hégémonie, cet article vise à mettre au jour les enjeux stratégiques inhérents à l’impact du "facteur chinois" en RDC. [less ▲]

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See detailPerilimbal pocket technique for surgical repositioning of prolapsed nictitans gland in dogs
Prémont, Johanna ULg; Monclin, Sébastien ULg; Farnir, Frédéric ULg et al

in Veterinary Record : Journal of the British Veterinary Association (2012)

The objective of this prospective study was to investigate the success rate, practicality and complications of a new perilimbal pocket technique for the replacement of prolapsed nictitans gland in 30 dogs ... [more ▼]

The objective of this prospective study was to investigate the success rate, practicality and complications of a new perilimbal pocket technique for the replacement of prolapsed nictitans gland in 30 dogs (44 eyes). A first incision was made in the bulbar conjunctiva, 2-3 mm from and parallel to the infero-nasal limbus, a second incision on the bulbar aspect of the nictitating membrane (NM), 2-3 mm parallel to the free edge. The gland was returned to its normal position by suturing the subconjunctival tissues of the NM to the episcleral tissues, using four to six interrupted horizontal mattress sutures. The English bulldog, Neapolitan mastiff, great dane and American cocker spaniel were commonly presented. Nictitans gland prolapse occurred prior to one year of age in 83.3 per cent of dogs, and unilaterally in 15 patients. The procedure was easy to perform, and had a 90.9 per cent success rate, with minimal complications. The median duration of follow-up, conducted by ophthalmic examination or telephone contact with the owners, was 21.5 months. Tear production and ocular health were not affected in 17 eyes with at least six months follow-up. There was a statistically significant increase between preoperative and postoperative Schirmer tear test-1 measurements. [less ▲]

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See detailPérils de la copie : les cas de l’Estoire del Saint Graal, du Merlin et de la Suite Vulgate
Combes, Annie ULg

in Cahiers de Civilisation Médiévale (in press)

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See detailLe périmètre irrigué de la Vallée du Kou: Diagnostic des efficiences hydro-agricole et élaboration des calendriers d'irrigation à l'aide de SIMIS (étude de cas)
Wellens, Joost ULg; Nitcheu, Martial

Report (2009)

La vallée du Kou a été depuis le milieu des années 70, le lieu d’un développement rapide de l’irrigation. Reconnue comme une excellente plaine à vocation agricole notamment pour la riziculture, en raison ... [more ▼]

La vallée du Kou a été depuis le milieu des années 70, le lieu d’un développement rapide de l’irrigation. Reconnue comme une excellente plaine à vocation agricole notamment pour la riziculture, en raison de ses importantes potentialités hydrauliques le périmètre irrigué de la vallée du Kou revêt une importance majeure dans les économies des communautés rurales et urbaines situées à proximité. D’une superficie totale aménagée de 1.260 ha, l’aménagement dudit périmètre à vocation rizicole a été réalisé de 1969 à 1970 dans le cadre de l’autosuffisance alimentaire. Malheureusement, ce périmètre est aujourd’hui peu performant à cause de la réduction progressive des surfaces emblavées au fil des années et de la faible productivité. De 7 t/ha environ de paddy par campagne pendant les premières années après l’aménagement, les rendements sont passés à 4 t/ha dans les dernières années. Actuellement, en station d’essai, les rendements atteignent 7 à 8 t/ha. Cela montre donc clairement les possibilités d’accroître les rendements sur les périmètres irrigués. Les causes principales de cette contre performance sont des pénuries en eau chroniques due à une intensification des utilisateurs en amont du périmètre et la mauvaise gestion de l’eau sur le périmètre. La question de la gestion de l’eau d’irrigation devient alors primordiale. C’est dans ce sens qu’il a été jugé nécessaire d'entreprendre une stratégie d'amélioration de la gestion de l'irrigation sur le périmètre. Après avoir élaboré un diagnostic des efficiences en irrigation, le logiciel SIMIS a été mis en place afin de proposer des scénarii d’irrigation fiables et équitables. [less ▲]

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See detailPerinatal care in Belgium
Battisti, Oreste ULg

Conference given outside the academic context (1990)

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See detailPerinatal depression in adolescent mothers : a public health concern
Noirhomme-Renard, Florence ULg; Tancredi, Annalisa; Gosset, Christiane ULg

Poster (2011, September)

Detailed reference viewed: 59 (4 ULg)
See detailPerinatal Group B Streptococcal Disease : Prevention strategies
Melin, Pierrette ULg

Conference (2006, February)

Detailed reference viewed: 5 (0 ULg)
See detailPerinatal Group B Streptococcal Disease Prevention, Interactive session
Melin, Pierrette ULg

Conference (2002, November 23)

Detailed reference viewed: 9 (1 ULg)
See detailPerinatal Group B Streptococcal infections
Melin, Pierrette ULg

Conference (2005, February)

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Peer Reviewed
See detailPerinatal growth hormone (GH) physiology : effect of GH-releasing factor on maternal and fetal secretion of pituitary and placental GH.
De Zegher, F.; Vanderschueren-Lodeweyckx, M.; Spitz, B. et al

in Journal of Clinical Endocrinology and Metabolism (1990), 71(2), 520-522

To study regulation of the secretion of human pituitary GH (hGH) and placental GH (hPGH) in the pregnant woman and human fetus, the GH-releasing factor Sermorelin [GRF-(l–29)-NH2] was administered to ... [more ▼]

To study regulation of the secretion of human pituitary GH (hGH) and placental GH (hPGH) in the pregnant woman and human fetus, the GH-releasing factor Sermorelin [GRF-(l–29)-NH2] was administered to pregnant women at term (n = 5), just before elective cesarean section; saline was administered in control studies (n = 5). The effects of GRF-(1–29)-NH2 administration on maternal and fetal serum concentrations of hGH and GRF-(l–29)-NH2 and maternal serum levels of hPGH were evaluated at birth. The mean time span between injection and birth was 20 min (range, 15–25 min). Cord serum hGH concentrations were similar in infants of GRF-(1–29)-NH2-injected mothers and control infants. GRF-(l–29)-NH2 elicited a consistent but small rise in maternal hGH serum concentrations (P = 0.08), whereas hPGH concentrations remained unaltered. Finally, GRF-(l–29)-NH2 concentrations were undetectable in cord serum, but readily detectable in concomitantly obtained maternal serum. In conclusion, these data suggest that hGH secretion in the pregnant woman at term is suppressed at the pituitary level, that GRF does not affect hPGH secretion, and that fetal hGH secretion is independent of circulating maternal GRF, probably because of lack of transplacental GRF passage. [less ▲]

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See detailPERINATAL INFECTIONS - The GBS successful practices in prevention
MELIN, Pierrette ULg

Conference (2012, October 20)

Updated information on the most common infectious diseases that the mother may transmit to her infant during pregnancy, at birth or by breast feeding the infant. Most of the emphasis is directed to ... [more ▼]

Updated information on the most common infectious diseases that the mother may transmit to her infant during pregnancy, at birth or by breast feeding the infant. Most of the emphasis is directed to preventive measures, screening when interventions are available, and the detailed analysis of interventions during the preconceptional period, antenatal care, perinatal care and maternal and neonatal care after birth. The strategic approach for prevention is illustrated with the group B streptococci story. This information emphasizes the basic knowledge of the pathogen, the disease, the burden of problems caused by the disease in the mother and her offspring, epidemiological aspects, and how to manage the disease. Most of the emphasis is directed to screening-based preventive measures and new approaches to improve the accuracy and predictive values of screening are discussed. An update of the developments of a group B streptococcal vaccine is briefly presented. [less ▲]

Detailed reference viewed: 43 (4 ULg)