August 2019
A view of road transport in Africa
Transport sector is usually divided into four main modes: road, air, maritime and rail modes. In sub-Sahara Africa, road appears as the dominant mode. Railways were developed during the colonial period but almost abandoned since the independence in most countries. Air transport once seen as sign of economic prosperity and instrument of sovereignty is far from being competitive. Maritime transport is mainly on coastal...
August 2019
Assessment of radiological risk from the soils of artisanal mining areas of Anka, North West Nigeria
Assessment of radiological risk was carried out on twenty soil samples collected from agricultural, mining and mine processing areas in Anka, Zamfara State, North Western Nigeria. The measurement of activity concentration of 226Ra, 232Th and 40K was performed using the gamma-ray spectrometer equipped with a high purity germanium detector. The values of the activity concentration of 226Ra ranged from 24.69±4.26 to...
August 2019
Exergy consumption analysis of the transportation sector of Senegal
Exergy analysis has become widely recognized and adopted as a powerful tool for physical and engineering systems analysis. In this paper, it was applied to transportation modes. Transport is second after the residential sector in Senegal when it comes to energy consumption and relies on imported fossil fuels. In 2013, it consumed around 32 PJ which represented 30% of total energy consumed in the country. Exergy use...
August 2019
Effect of seed pre-treatment and its duration on germination of Detarium microcarpum (Guill. and Perr.)
Detarium microcarpum Guill and Perr is a multipurpose tree species indigenous to semi-arid regions of Sub-Saharan Africa. It is being exploited to local extinction due to high dependence for fuelwood and other uses. The present study explored different pre-treatment methods for enhancing seed germination and growth of D. microcarpum in the Guinea savanna zone of Ghana. The experiment employed a 4 × 4...
Advertisement
Advertisement
