Hématome post traumatique du muscle iléopsoas avec paralysie du nerf fémoral: à propos d’un cas et revue de la littérature

L'hématome compressif du muscle iliopsoas dans le petit bassin est une complication connue des traitements anticoagulants, mais reste rare enpost-traumatique. La présente observation illustre un cas de cet hématome chez un adolescent de 14 ans qui s'est présenté avec une douleur  posttraumatique de la cuisse et un déficit actif d'extension de la jambe évoluant depuis plus de 3 mois. Un examen clinique a montré l'existence d'une paralysie complète du quadriceps. Une IRM du petit bassin a retrouvé un volumineux hématome du muscle iliopsoas comprimant le nerf fémoral.Un drainage chirurgical de l'hématome a été réalisé. La récupération  musculaire était partielle après six mois de recul

Ab-initio and Critical behaviors of the perovskite CaMnO3_3 for solar cell applications

In this work, we used the density functional calculation (DFT) implemented in the Quantum Espresso software, using the approximations (GGA, GGA+U) to illustrate the electronic and magnetic properties of the perovskite CaMnO$_3$. It has been found that the CaMnO$_3$ perovskite is stable in the G-AFM phase. When expecting the total and partial DOSs, a strong contribution of the d-Mn states has been outlined. The Coulomb correction U and the site exchange interaction J have been implemented and then we compared the two approximations GGA and GGA+U. It is found that the GGA+U method leads to more accurate results since this correction takes into account the bonding effects between different atoms. To complete this study we performed the simulations under Monte Carlo code based on the Metropolis algorithm. In fact, we have simulated the physical quantities: magnetization, susceptibility, and specific heat of the studied CaMnO$_3$ material as a function of temperature

Elaboration and characterization of Co-Zn2 SiO4 pigments

In this communication, we reports results on the synthesis of Zn2-xCoxSiO4 (0≤x≤1) ceramic pigments by sol-gel method with the main aim of achieving high purity at lower temperatures. The second objective is to obtain a variety of colours (turquoise, purple, violet and blue) with a minimum quantity as possible as of cobalt. The materials were investigated by X-ray diffraction, infra-red spectroscopy, UV-visible spectroscopy, Lab-colour measurements and Scanning Electron Microscopy (SEM).In this communication, we reports results on the synthesis of Zn2-xCoxSiO4 (0≤x≤1) ceramic pigments by sol-gel method with the main aim of achieving high purity at lower temperatures. The second objective is to obtain a variety of colours (turquoise, purple, violet and blue) with a minimum quantity as possible as of cobalt. The materials were investigated by X-ray diffraction, infra-red spectroscopy, UV-visible spectroscopy, Lab-colour measurements and Scanning Electron Microscopy (SEM)

Preparation and characterization of a composite material based on a geopolymer binder and quartzite aggregates

We have developed a geopolymer material by alkaline reaction on thermally activated kaolin. Initially we characterized the geopolymer by different methods (rheology, DTA-TGA, etc.) and we mixed it with different amounts of natural sand to obtain a granular composite. The structural characterization of this material was undertaken by several techniques (XRF, XRD and microscopic observations). A rheological study was implemented to determine the influence of the aggregate rate on the setting kinetic. Three-point bending and compression tests were conducted for mechanical characterization. We also conducted microindentation tests to study the influence of quartzite rate on the hardness of the material. The results indicate that the integration of quartzite (up to 15 wt. %) did not alter the setting kinetic. We noted a small degradation of the mechanical behavior when the quartzite rate is increased; this effect is due to a higher density of microcracks. However, adding the aggregate has a beneficial effect on the hardness of the material. These attractive features make this material a plausible matrix whose reinforcement with plant fibers will provide a ternary composite suitable for multiple applications

Hémangiopéricytome de l’angle ponto-cérébelleux: cas clinique et revue de la littérature

Les hémangiopéricytomes primitifs du système nerveux central sont rares et représentent moins de 1% des tumeurs intracraniennes. La localisation au niveau de l'angle ponto-cerebelleux est très rare, pouvant simuler un neurinome de l'acoustique ou un méningiome. Le diagnostic de certitude est basé sur l'étude histologique et immunohistochimique. Notre but est d'illustrer avec une revue de la littérature les aspects clinicoradiologiques, anatomopathologiques et la prise en charge thérapeutique de ce type de lésion