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Articles by M.O. Ojo
Total Records ( 2 ) for M.O. Ojo
  O.O. Alabi , F.O. Akinluyi , M.O. Ojo and B.A. Adebo
  Ten fresh rock samples were collected from three rivers in Osun State, namely Erin-Ijesha (EI), Osun-Osogbo river (OS) and Ishasha river in Edunabon near Ile-Ife (IS). The study area is underlain by the Precambrian Basement Complex of southwestern Nigeria. This is to determine their radioactive heat production and the contribution of each radionuclide content. The radiogenic heat production was determined by spectrometer which gives the area photopeak of the radionuclides contribution. These photo peaks were later converted to Bq Kg-1 and part per million (ppm) for radiogenic heat computation. The result shows that concentration and rate of heat production of 40K, 238U and 232Th in the samples varies significantly with geological location. The total heat production ranges from 8.21 to 235.82 pW kg-1. The highest concentration and heat production is recorded in Quatz of Osun-Osogbo rivers and the heat produced by 40k is highest in six samples. It is also noted that rock samples from Erin-Ijesha river are associated with high heat production of 232U.
  R.T. Akinnubi , B.F. Akinwale , M.O. Ojo , P.O. Ijila and O.O. Alabi
  Characteristic variation of relative humidity and solar radiation enhances the understanding of the significance of indicated trends of variability to everyday life and the factors that might be responsible for such variations. This study critically analyses the seasonal trends and the existing relationship between solar radiation and relative humidity of Ibadan, Nigeria. The data used for the study were extracted from a 48 months (1999-2001) daily radiation data estimated from Gunn-Bellani distillate and relative humidity obtained from International Institute for Tropical Agriculture (IITA) Ibadan (7.3N, 3.3E), Oyo State. Simple graphical methods were adopted to analyze the trends of variation, using average monthly values for each parameter. The monsoon depression usually occurs annually during the month of August. The minimum value of solar radiation and a high value of relative humidity of 10.3MJ/m2/day and 87.8%, respectively were recorded during this month. The curves on the mean relative humidity are inversely proportional to observed curves on solar radiations.
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