Browsing by Author "Jibiri, N. N."

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    Evaluation of radiation emissions, physico-chemical parameters and insect fauna around the environment of National Institute of Radiation Protection and Research (NIRPR), Ibadan, Nigeria
    (Maxwell Scientific Organization, 2013-06) Popoola, K. O. K.; Ibrahim, K. T.; Jibiri, N. N.; Oricha, A. K.; Badmus, H. A.
    Radiation emissions from the University of Ibadan National Institute of Radiation Protection and Research (NIRPR), physico-chemical properties measurement and insect’s fauna collection around the surrounding of the Institute were conducted for a period of six months (November, 2011-April, 2012). Radiation survey meter model (RDS-30) type was used to take readings along the immediate surroundings of the NIRPR surroundings. Soil samples were collected at five points in the study site at a distance of 50 m from the Institute and the football pitch with a distance of 250 m away from the Institute as control site. Heavy metals (Fe, Cu, Zn, Cr, and Pb) were analysed using MiniPal 4 energy-dispersive X-Ray fluorescence (EDXRF) bench top spectrometer. Pit falls and sweep net were used in collection of crawling and flying insects respectively, some other arthropods were also collected. Results showed that radiation emission values of 0.012-0.016 μSv/hr was recorded, which was higher than the control site with reading of 0.009 μSv/hr. Heavy metal readings showed that iron (Fe) was higher at the sites than other metals. Correlation between chromium and lead was high (0.797) at (p<0.01). Diversity indices (Margalef, Shannon Wiener and Evenness respectively) for control site (3.56, 0.54, and 0.52) were higher than at the study site (2.62, 0.15 and 0.17). There was no correlation between arthropods abundance and radiation. This result therefore suggests that radiation could not be implicated in abundance and distribution of these arthropods.
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    Occupational exposure due to RF leakages within GSM base station cabins in eastern Nigeria
    (2012-05) Ayinmode, B. O.; Jibiri, N. N.; Farai, I. P.
    The occupational exposure due to RF radiation leaks inside the base station cabin, when working on the Base station Transceiver (BTS) Radios and TX cables and during active radio communication was measured. A total of number 30 base stations Cabins were studied in the eastern part of Nigeria, using a Broad band TES-90 Electrosmog meter. The maximum instantaneous electric field strength obtained from GSM 1800 radio was 3.72 V/m, 16.56 V/m for GSM 900 radio and 11.29 V/m for the Tx cables. The maximum instantaneous indoor and out power density were 35.47 mW/m2 and 6.64 mW/m2 respectively. Also, the average values of the obtained electric field strength from all the cabins are 1.18 ± 1.07 V/m from GSM 1800 radio, 2.33 ± 3.82 V/m from GSM 900 radio and 1.77 ± 2.20 V/m from the Tx cables. The result of this study shows that the values were less than ICNIRP limits for occupational exposure.