A study of the origin of an indigenous community in central Nigeria: interrogating Akpoto-Igala phenomenon

The Igala lives in a deciduous forest belt to the south and open savannah vegetation to the north. They occupy a triangular tract of land located at the confluence of rivers Niger and Benue. The Igala, like many other ethnic groups in Nigeria, holds several myths and traditions concerning their probable place of origin. Various attempts at tracing the origin of the people have elicited as many traditions as are scholars who attempted to unravel the origin of the people. This paper is therefore, an attempt to examine the various arguments on the origin and the place of Akpoto in the traditions of the people

MEH-PPV film thickness influenced fluorescent quenching of tip-coated plastic optical fiber sensors

The performance of plastic optical fiber sensors in detecting nitro aromatic explosives 1,4-dinitrobenzene (DNB) have been investigated by fluorescence spectroscopy and analyzed by using fluorescence quenching technique. The plastic optical fiber utilized is 90 degrees cut tip and dip-coated with conjugated polymer MEH-PPV poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] thin films for detection conjugants. The thicknesses of the MEH-PPV coating were varied to improvise the sensitivity whilst slowly reducing the fluorescence intensity. It was shown that fluorescence intensity from thinner film decreased by (82% in 40 s) in the presence of DNB signifying an improvement of 28% reduction with time 13 s less than that of the thicker film