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See detailContribution d'un modèle à la détermination des zones de prévention autour d'un captage de sources à l’émergence dans les calcaires carbonifères du Condroz (Belgique)
Derouane, Johan; Dassargues, Alain ULg; Monjoie, Albéric ULg

in Actes du Colloque International Eau Souterraine en Région Agricole ESRA'96 (1996)

Detailed reference viewed: 41 (4 ULg)
See detailContribution de l’anthropologie des sens à une anthropologie des sensibilités
Colon, Paul-Louis ULg

Scientific conference (2010, February 26)

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See detailContribution de l’approche génétique à la compréhension du fonctionnement cognitif
Collette, Fabienne ULg

in Revue de Neuropsychologie, Neurosciences Cognitives et Cliniques (2012), 4(2), 81-83

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See detailContribution de l'élevage ovin à l'augmentation de la production de viande au Bénin
Gbangboche, A. B.; Hornick, Jean-Luc ULg; Abiola, F. A. et al

in Revue Africaine de Santé et de Productions Animales [=RASPA] (2005)

Cet article a relaté la situation de l’élevage des ruminants à travers la production, la consommation et la commercialisation de viande en Afrique subsaharienne au cours de ces trois dernières décennies ... [more ▼]

Cet article a relaté la situation de l’élevage des ruminants à travers la production, la consommation et la commercialisation de viande en Afrique subsaharienne au cours de ces trois dernières décennies. Il faut signaler que l’élevage des ovins représente particulièrement l’un des secteurs d’activité importants dans les milieux ruraux, puisqu’il nécessite peu d’investissements et les conditions de commercialisation des ovins sont très souples par rapport aux bovins pour couvrir les besoins financiers ponctuels de l’éleveur. Au Bénin, malgré la rusticité et la trypanotolérance des ovins Djallonké, un certain nombre de contraintes font que leur niveau de production est resté faible par rapport à la moyenne de l’Afrique subsaharienne. Pour optimiser la production ovine dans ce pays, l’une des priorités à la mise en place des schémas d’amélioration génétique, serait entre autre, l’estimation des facteurs influençant la croissance et la reproduction des ovins Djallonké, deux caractères intimement liés à la production de viande. [less ▲]

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See detailContribution de l'hypertension arterielle au risque vasculaire du diabetique.
Marre, M.; Bouhanick, B.; Hadjadj, S. et al

in Diabètes & Métabolism (1999), 25 Suppl 3

Hypertension is a major cardiovascular risk factor in diabetic subjects. Recent trials have suggested that blood pressure objectives should be < or = 140/80 mmHg. However, there is currently no evidence ... [more ▼]

Hypertension is a major cardiovascular risk factor in diabetic subjects. Recent trials have suggested that blood pressure objectives should be < or = 140/80 mmHg. However, there is currently no evidence supporting any particular preferential drug strategy for this treatment objective. [less ▲]

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See detailContribution de l’inactivation épigénétique des gènes BRCA1 et BRCA2 dans les cancers du sein sporadiques en Tunisie
Trimeche, Mounir; Ziadi, Sonia; Hachana, Mohamed Ridha ULg et al

in Bulletin du Cancer (2008)

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See detailContribution de la biologie moléculaire au progrès de l'élevage.
Renaville, Robert ULg; Georges, Michel ULg; Smal, Caroline et al

Conference (2005, January 26)

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See detailContribution de la chimie clinique au diagnostic et au pronostic de l'infarctus du myocarde.
Heusghem, C.; Chapelle, Jean-Paul ULg; Kulbertus, Henri ULg

in Bulletin de l'Académie Nationale de Médecine (1985), 169(7), 1097-107

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See detailContribution de la chimie macromoléculaire à l'élaboration de matériaux colloïdaux et microparticulaires destinés à la vectorisation de médicaments
Grandfils, Christian ULg; Flandroy, P.; Jérôme, Robert ULg

in Innovation et Technologies en Biologie et en Médecine (1995), 16

Various colloidal and microparticular vector have been tailored during the last few years in order to promote the transport , the protection and the orientation of the drug towards its pharmacological ... [more ▼]

Various colloidal and microparticular vector have been tailored during the last few years in order to promote the transport , the protection and the orientation of the drug towards its pharmacological target. The aim of the paper is to give some insight about the contribution of the macromolecular engineering for the development of two vectors : microparticles of a control biodegradation rate designed for the chemoembolization of hepatocarcinoma , amphiphile copolymeric micelles able to transport drug within the targeted cells. Starting from a synthetic polymer : polylactide, degradation rate caracteristics , and functionalities can be tailored for the intended applications. One of the major problems , and largely underestimated in the past , for the successfull design of polymeric carrier is to take into account the interaction of proteins with polymer surfaces. [less ▲]

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See detailContribution de la télémétrie à l'investigation urodynamique de la fonction vésico-urétrale chez la chienne.
Noël, Stéphanie ULg

Doctoral thesis (2013)

Micturition disorders are common in veterinary medicine and can occur already in puppies. The congenital urethral sphincter mechanism incompetence represents the second cause of urinary incontinence in ... [more ▼]

Micturition disorders are common in veterinary medicine and can occur already in puppies. The congenital urethral sphincter mechanism incompetence represents the second cause of urinary incontinence in puppies but data on the development and the evolution of the continence mechanism are lacking in veterinary medicine. This study could be the first step in the understanding of the pathophysiology of congenital urethral sphincter mechanism incompetence which resolves spontaneously in half of the affected dogs after the first of the second oestral cycle. The lower urinary tract has been widely investigated in adult female dogs, particularly by urodynamics. Urodynamics is a useful technique providing informations on the vesico-urethral function but some limitations are described. The major limitation is the need for sedation or anaesthesia as it is not feasable to obtain interpretable data from an awake animal. A second limitation is associated with the technique of retrograde cystometry because the technique of bladder filling and the filling rate are not physiological. Therefore, techniques have been developed such as diuresis cystometry or ambulatory urodynamics to decrease the impact of these limitations. In urological research, telemetry allows the investigation of different urodynamic parameters without the need for physical or chemical restraint and during several micturition cycles. The objectives of this work were to study the development and the evolution of the continence mechanism during the prepubertal period and during the two first oestral cycles and to study the vesico-urethral function with telemetry. This technique will be standardized and afterwards will be used to study different current urological drugs commonly used in veterinary medicine. In the first study, we showed that the values of the urodynamic and morphometric parameters of the lower urogenital tract varied in function of the growth of the bitches and also in function of the different phases of the œstrus cycle. The end of the prepubertal period was characterized by an increase of the urethral pressures (maximal urethral pressure, MUP ; maximal urethral closure pressure, MUCP ; integrated pressure, IP) and functional urethral length (FPL) but also by an increase of the urethral (UL) and vaginal lengths (VL) measured by vagino-urethrography compared with values at earlier times. The bladder function was characterized by a non-linear increase of the bladder capacity, which was reached at 6 months of age and by an increase of the bladder threshold pressure observed from 7 months of age. During the oestrus cycle, the urethral pressures significantly decreased during the oestrus and the early dioestrus which are characterized by a decrease in oestrogen plasmatic concentration and by an increase in progesterone plasmatic concentration. The highest values of FPL were observed during the follicular phase (œstrus, prooestrus). Values of UL could not be determined during œstrus of the first cycle because urethras were not identifiable on vaginourethrograms obtained at that time. During the second œstrus cycle, UL was significantly higher during œstrus and early dioestrus compared to anoestrus. No significant variation in Pth was observed during the first cycle ; however during the second cycle, the lowest Pth values were observed during late anoestrus. Pth values were also lower during œstrus compared to proestrus. The luteal phase was associated with an increase in bladder capacity that reached the highest value during the dioestrus. The VL decreased progressively during the second cycle to reach the lowest value during anoestrus. The MUCP and UL were significantly higher during the anoestrus of both cycles compared to the values obtained when the dogs were 9 months old. The same observation was made for IP at the first anoestrus. The increase in values of these parameters during periods with low hormonal influence could suggest an impact of the growth but also a constant improvement of bladder function all along the study. It was interesting to observe that the position of the bladder was variable during the prepubertal period as she was either in an intrapelvic or in an intra-abdominal position. After the prepubertal period, the bladder was always in an intra-abdominal position. In the second study, we showed that a single administration of ephedrine or phenylpropanolamine (PPA) was able to significantly modify the urodynamic and the morphometric parameters. Using conventional urodynamics, both ephedrine or PPA increased the urethral pressures during 4 hours and the FPL during 2 hours. The integrated pressure was elevated during 6 hours with PPA and its value was higher than the value obtained with ephedrine. On the other hand, the FPL remained elevated during 18 hours with ephedrine. Using telemetry, ephedrine, and to a lesser extent PPA, modified bladder function. The administration of ephedrine was associated with an increase in bladder threshold volume and a decrease of the detrusor threshold pressure. An increase in bladder volume was observed after PPA administration. Both drugs modified significantly the hemodynamic parameters. Arterial pressures were significantly increased during 4 to 6 hours after the administration of both drugs and were associated with a decrease in heart rate during 12 hours. These results were in agreement with previous studies and confirmed the fact that sympathetic drugs must be used with caution in incontinent dogs suspected of cardio-vascular diseases. In the third study, we showed that interpretable values of urodynamic parameters were obtained with telemetry. Physiological data were obtained from telemetric recordings because no sedative or analgesic drugs were used during the recording and bladder filling was natural. The location of the implant inside a subcutaneous cavity in the left flank did not disturb the dogs and the quality of the signals were good when the receiver was placed on the lateral wall of the metabolic cage. Telemetry allows continuous recording of values of urodynamic parameters (abdominal pressure, bladder pressure, detrusor pressure and bladder threshold volume) and values of smooth muscle electrical activity parameters. In the first step of the study, conventional urodynamics was compared to telemetry. The values of bladder threshold volume obtained by telemetry was significantly lower than the values obtained by conventional urodynamics. No difference in values of threshold bladder pressure was observed between the two techniques. In the second step of the study, the repeatability of telemetric recordings was assessed between day and night. A good repeatability was obtained with the night recordings. Comparing day and night recordings, higher bladder threshold volumes and lower detrusor threshold pressures were obtained during the night. No variation of the urodynamic parameters was observed during the bladder filling phase. The smooth muscle urethral electrical activity did not vary during the bladder filling phase. The frequency of micturition was not different between day and night but the frequency of involuntary detrusor contractions was higher during the day. In the third step of the study, the effect of drugs currently used to treat different micturition disorders were studied. Oestriol and duloxetine increased the electrical activity at day 8 compared to days 0, 1 and 15. No significant effect of PPA, oestriol, oxybutynin, bethanechol and duloxetine was observed on the values of urodynamic parameters or on the frequency of involuntary detrusor contractions. The results obtained in this study suggest that circadian variations may influence urodynamic measurements and that long-term telemetric studies of the lower urinary tract should be conducted during the night to obtain repeatable recordings. Further pharmacokinetic and pharmacodynamics studies are needed to confirm the effects of the different drugs on vesico-urethral function. [less ▲]

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See detailContribution de la tomographie et du bruit sismique à la characterisation des dépôts alluviaux dans le bassin du Kou (Burkina Faso)
Sauret, Elie ULg; Beaujean, Jean ULg; Nguyen, Frédéric ULg et al

Conference (2012, November)

Abstract The alluvial plain of the Kou basin is located in the southwest of Burkina Faso. In this basin, the main surface water resource for agricultural needs is constituted by a small perennial river ... [more ▼]

Abstract The alluvial plain of the Kou basin is located in the southwest of Burkina Faso. In this basin, the main surface water resource for agricultural needs is constituted by a small perennial river, but in recent years this resource is insufficient to satisfy the uses in agriculture. The alluvial plain which extends from either side of this river banks is expected to have the potential for constituting an alternative water supply for agricultural needs. However, the characterisation of the alluvial plain is still superficial though the plain extension and the nature of the deposits are roughly known. The objective of this study is to improve the characterisation of the alluvial plain, in particular the heterogeneity and the thickness of the deposits, using geophysical methods, namely Electrical Resistivity Tomography (ERT) and Horizontal and Vertical Spectral Ratio (H/V SR). The ERT and H/V SR methods are non invasive geophysical techniques, simple, efficient, robust and easy-to-use geophysical tools in alluvial environment based respectively on the soil resistivity and the resonant frequency of superficial materials. In upstream of the alluvial plain, near the river, these methods were used to map the sandy to sandy-thin deposits (0-5m) and the unfractured bedrock. Downstream they highlight fractured and deconsolidated bedrock drawing a V-shaped geometry of deposits. This geometry is due to the faults and the magmatic intrusions. The bottom of the V-shaped would be filled mainly by fractured/deconsolidated bedrock materials and the edges by the clay and laterites deposits. The alluvial plain would be relatively thicker downstream of the study area (approximately 30 to 50m). A correlation is obtained between ERT images and resonance frequencies determined on the H/V profiles. From a hydrogeological point of view, downstream of the study area, the alluvial plain would constitute an important aquifer with a high porosity and thick deposits. This aquifer could be easily accessible with rudimentary structures (such as sumps) and could constitute a supplementary water source, for irrigation activities in this second region of Burkina Faso. [less ▲]

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See detailContribution des agricultrices au développement rural et à une agriculture durable
Turlot, Amélie; Duquesne, Brigitte ULg

Conference (2006)

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See detailContribution des macrophytes flottants dans l'épuration des eaux usées
Tangou Tabou, Thierry ULg

in Annales de la faculté des Sciences, Université de Kinshasa, Science et Discursivité et Presse universitaire de Kinshasa (N°spécial) (2008)

Detailed reference viewed: 10 (5 ULg)