This work focuses on improving the technical and economic performance of poultry farming sub-sector in Benin. We were specifically interested study design a grinder-grader for feed. Indeed, two different technologies controlling particle size are combined into one to form crusher-sizer. is fragmentation food particles, carried out by mobile hammer mill dimensional classification vibrating sieve...

A 69-year-old woman was admitted to hospital 4 times from November 2007 to June 2009. The patient had silicosis complicated by broncholithiasis, esophagobronchial fistula, and relapsed tuberculosis. She had worked as a stone crusher for 3 years and was exposed to a large amount of quartz dust. Barium esophagography, gastroesophageal endoscopy, and biopsy suggested esophageal-related chronic inf...