African cuisine encompasses within its fold several nations, including Morocco, Algeria, Libya, Tunisia, Egypt and Sudan. The roots of North African cuisine can be traced back to the ancient empires of North Africa, particularly in Egypt, where many of the country's dishes and culinary traditions date back to antiquity. Over several centuries traders, travelers, invaders, migrants and immigrants all have influenced the cuisine of North Africa. The Phoenicians of the 1st century brought sausages, while the Carthaginians introduced wheat and its by-product, semolina. The Berbers adapted semolina into couscous, one of the main staple foods. Olives and olive oil were introduced before
Birbeck granules periphery of the Langerhans cells and release their contents into the extracellular matrix. Another theory is that the Birbeck granule functions in receptor-mediated endocytosis, similar to clathrin-coated pits. Birbeck granules were discovered by Michael Stanley Clive Birbeck (1925–2005), a British scientist and electron microscopist who worked at the Chester Beatty Cancer Research Institute or Institute of Cancer Research, London from 1950 until 1981. Birbeck granules Birbeck granules, also known as Birbeck bodies, are rod shaped or "tennis-racket" cytoplasmic organelles with a central linear density and a striated appearance. First described in 1961 (where they were simply termed "characteristic granules"), they