Electrical and Optical Properties of In2O3 Thin Films Deposited on Sapphire Substrate.

In2O3 thin films were prepared on c-plane sapphire substrates using laser molecular beam epitaxy technique. The X-ray diffraction (XRD) patterns revealed that the In2O3 thin films were highly oriented along the (111) direction. The intensity of (222) diffraction peaks mainly depend on growth temperature, and the crystallite sizes mainly depend on oxygen pressure. The carrier concentrations exhibit a decrease with increasing growth temperature and oxygen pressure, meantime, the resistivity increase. The red shift of In2O3 thin films respect to that of bulk In2O3 can be explained by defect energy levels formation, the blue shift of In2O3 thin films depends on carrier concentration, can be explained by Burstein-Moss band-filling effect.

[Primary abscess of the psoas. A common disease in tropical countries. Apropos of 87 cases]. / Abcès primaires du psoas. Affection courante en milieu tropical. A propos de 87 cas.

Over a 4 years period, 87 cases of primary abscesses of the psoas were treated surgically at the Central Hospital in Yaoundé. The psoas muscle was involved in 10.17% of the cases with myositis. Most patients were in young male and the abscesses were in an advanced stage. Staphylococcus was the most frequently encountered germ (78.4%) and enterobacteria were only found in 3.07%. The diagnosis was based on clinical and echographic findings. There was 1 patient with acquired immunodeficiency syndrome (AIDS). Most cases were treated by extraperitoneal drainage. Morbidity and mortality were low and generally occurred in debilitated patients (AIDS, involvement of several muscle groups, diabetes).

[A rare complication of inguinal hernia. Evisceration by rupture of the scrotum secondary to blunt trauma of the abdomen]. / Une complication rare de hernie inguinale. Eviscération par rupture scrotale secondaire à un traumatisme appuyé de l'abdomen.

The authors present a case report of scrotal rupture with evisceration from abdominal contusion in a patient with a voluminous inguino-scrotal hernia. The mechanism and treatment of lesions are discussed.