Gestion péri opératoire d’un paragangliome rétro-péritonéal

Nous rapportons l'observation d'un patient âgé de 62 ans qui présente des douleurs abdominales avec une masse du flanc droit. Les explorations morphologiques ainsi que les données biologiques ont permis de faire le diagnostic d'un paragangliome secrétant. Les particularités diagnostiques ainsi que la gestion périopératoire sont envisagées

Basin tectonic history and paleo-physiography of the pelagian platform, northern Tunisia, using vitrinite reflectance data

Constraining the thermal, burial and uplift/exhumation history of sedimentary basins is crucial in the understanding of upper crustal strain evolution and also has implications for understanding the nature and timing of hydrocarbon maturation and migration. In this study, we use Vitrinite Reflectance (VR) data to elucidate the paleo‐physiography and thermal history of an inverted basin in the foreland of the Atlasic orogeny in Northern Tunisia. In doing so, it is the primary aim of this study to demonstrate how VR techniques may be applied to unravel basin subsidence/uplift history of structural domains and provide valuable insights into the kinematic evolution of sedimentary basins. VR measurements of both the onshore Pelagian Platform and the Tunisian Furrow in Northern Tunisia are used to impose constraints on the deformation history of a long‐lived structural feature in the studied region, namely the Zaghouan Fault. Previous work has shown that this fault was active as an extensional structure in Lower Jurassic to Aptian times, before subsequently being inverted during the Late Cretaceous Eocene Atlas I tectonic event and Upper Miocene Atlas II tectonic event. Quantifying and constraining this latter inversion stage, and shedding light on the roles of structural inheritance and the basin thermal history, are secondary aims of this study. The results of this study show that the Atlas II WNW‐ESE compressive event deformed both the Pelagian Platform and the Tunisian Furrow during Tortonian‐Messinian times. Maximum burial depth for the Pelagian Platform was reached during the Middle to Upper Miocene, i.e. prior to the Atlas II folding event. VR measurements indicate that the Cretaceous to Ypresian section of the Pelagian Platform was buried to a maximum burial depth of ~3 km, using a geothermal gradient of 30°C/km. Cretaceous rock samples VR values show that the hanging wall of the Zaghouan Fault was buried to a maximum depth of <2 km. This suggests that a vertical km‐scale throw along the Zaghouan Fault pre‐dated the Atlas II shortening, and also proves that the fault controlled the subsidence of the Pelagian Platform during the Oligo‐Miocene. Mean exhumation rates of the Pelagian Platform throughout the Messinian to Quaternary were in the order of 0.3 mm/year. However, when the additional effect of Tortonian‐Messinian folding is accounted for, exhumation rates could have reached 0.6-0.7 mm/year

Structural and optical modeling of electro deposited CuInSe2 thin films

The ternary semiconductor CuInSe2 is one of the most advantageous materials for the manufacturing of thin film solar cells. In this study, CuInSe2 thin films were prepared at room temperature using the electrodepositing method. The as-prepared films were found to be amorphous. The CuInSe2 films were crystallized in a tubular resistive furnace, and characterized by means of the the X-ray diffraction (XRD) and UV-VIS-NIR spectroscopy techniques. The parameters to optimize are the temperature and duration of the annealing time, and the Cu/In ratio in the precursors

Transplantation foie–rein combinée : indications et résultats. [Combined liver-kidney transplantation: Indications and results.]

PURPOSE: The purpose of this article is to report our experience concerning the indications and results for combined liver-kidney transplantation in our centre. MATERIAL AND METHOD: From July 1991 to October 2006, 26 patients underwent combined liver-kidney transplantation in our establishment. This group comprised 16 men and 10 women with a mean age of 50.1 years (range: 19 to 68 years). The main indications were as follows: hepatorenal polycystic disease, type I hyperoxaluria, cirrhosis associated with end-stage renal failure. RESULT: The median follow-up was 62.73 (+/-50.9) months. Only two patients of this series died, one at 70 months from gastric cancer, and the other at 89 months from cerebral metastases. Nine patients developed surgical complications (29%). Liver function was normal in the 24 surviving patients. Only one case of loss of renal graft was observed at 12 years and this patient is currently on dialysis. The mean creatinine level in these patients (apart from the dialysed patient) at the last follow-up visit was 120.3 (+/-30.43)mumol/l. CONCLUSION: Combined liver-kidney transplantation can be performed with acceptable morbidity and mortality and excellent long-term results

Reverse phenology and dry-season water uptake by Faidherbia albida (Del.) A. Chev. in an agroforestry parkland of Sudanese west Africa

International audienc

Fonctionnement hydrique et profondeur de prélèvement de l'eau de Faidherbia albida dans un parc agroforestier soudanien

International audienceinversée, qui soulève de nombreuses questions relatives à sa stratégie d'utilisation de l'eau. Le fonctionnement hydrique d'arbres adultes a été enregistré en parc agroforestier (Dossi, Burkina Faso, 924 mm de pluies). Les racines de F. albida plongeaient profondément, colonisaient les horizons les mieux alimentés en eau, et s'interrompaient au voisinage de la nappe (-7,5 m). Au plus fort de la saison sèche, le potentiel hydrique des horizons colonisés par les racines est modérément descendu, jusqu'à des valeurs de -0,4 MPa, ce qui concordait avec les valeurs minimales de potentiel hydrique foliaires de base (-0,5 MPa). Ceci indique que les arbres connaissaient des déficits hydriques relativement modérés au cours de la saison sèche. La comparaison de la composition isotopique en oxygène (delta 18O) du sol, de la sève et de la nappe, a montré que la nappe contribuait majoritairement à la consommation en eau des arbres au cours de la saison sèche. Toutefois, après le retour des pluies, les arbres ont pu prélever en surface. Ceci était cohérent avec la remontée simultanée des potentiels hydriques de base. Les F. albida ont montré de fortes transpirations en début de saison sèche, jusqu'à 400 litres par jour pour un arbre de 70 cm de diamètre de tronc. La surface foliaire a peu varié au cours de la saison sèche, mais le flux de sève rapporté à l'ETP (F/ETP) et la conductance hydraulique sol-feuilles (gL) ont chuté de 50%. En conséquence, les arbres ont fermé leurs stomates, en raison de leur sensibilité aux variations (modérées) de disponibilité en eau du sol, et/ou à l'augmentation du déficit de saturation de l'air (VPD). La croissance a ralenti, puis s'est interrompue en fin de saison sèche : elle a donc pu être affectée par la sécheresse... (D'après résumé d'auteur

Reduction of Oxidizable Pollutants in Waste Water from the Wadi El Bey River Basin Using Magnetic Nanoparticles as Removal Agents

Many of the current strategies for removing pollutants from water are based on nanomaterials and nanotechnology. Lower values of Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD) in water results in reduction in the amount of oxidizable pollutants. We present a study on the reduction of COD and BOD5 in water from Wadi El Bey River (Tunisia), using magnetite nanoparticles (MNPs) and magnetic fields. The COD and BOD5 removal reached values higher than 50% after 60 min, with optimum efficiency at pH values of ≈8 and for MNPs concentrations of 1 g/L. The use of a permanent magnetic field (0.33 T) showed an increase of COD and BOD5 removal from 61% to 76% and from 63% to 78%, respectively. This enhancement is discussed in terms of the MNPs coagulation induced by the magnetic field and the adsorption of ionic species onto the MNPs surface due to Fe3O4 affinity

Pilot-scale direct UV-C photodegradation of pesticides in groundwater and recycled wastewater for agricultural use

International audienc