The Khartoum-Omdurman conurbation : a growing megacity at the confluence of the Blue and White Nile Rivers

Khartoum is one of the largest cities in Africa, located immediately south of the junction of the Blue and White Nile rivers in central Sudan. The growth of the Greater Khartoum-Omdurman conurbation arose \uac\u2013 without a proper urban plan \u2013 from the agricultural wealth created through the completion of three major dams in 1925, 1937 and 1966, and mostly in the last three decades. Urban expansion was enabled by and helped to enhance the major agricultural expansion of the Gezira clay plains located to the south between the lower Blue and White Nile rivers. The confluence of the Blue and White Nile has been a focus of human settlement for at least 8,000 years, initially by semi-sedentary groups with a fishing-hunting-gathering lifestyle and later by Neolithic groups as shown by hundreds of archaeological sites. Today, Khartoum is a desert city and the hottest capital city on Earth, still very vulnerable to floods triggered by intense convectional storms. Such extreme events may become more common in future, representing a major geomorphological hazard in a city developed without urban plans. Moreover, uncontrolled urban and agricultural development is threatening most of the prehistoric cultural heritage of the region

7th Drug hypersensitivity meeting: part two

No abstract availabl

Investigations into the effects of petroleum hydrocarbons on the immunocompetence of Ostrea edulis and the potential application for biological monitoring (with preliminary investigations on the immunology of Crassostrea biological rhizophorae)

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN0166712 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Recent Archaeological Research in Southeastern Ethiopia. 1974 - 1975

Clark J. Desmond, Williams M.A.J. Recent Archaeological Research in Southeastern Ethiopia. 1974 - 1975. In: Annales d'Ethiopie. Volume 11, année 1978. pp. 19-44

Explicit solutions of a simplified model of capillary sprout growth during tumour angiogenesis

AbstractWe present a mathematical model describing the growth and development of capillary sprouts in response to the chemotactic stimulus of a tumour angiogenesis factor (TAF). Exact analytical solutions are then derived for a simplified model which retain the salient qualitative features of the full model