Browsing by Author "Abdul Dimeji, ISHOLA"

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    Evaluation of Heavy Metals in Water, Sediment, Fish and Flora from Six Selected Dams in Osun State, South-Western, Nigeria
    (Lead City University, 2023-12) Abdul Dimeji, ISHOLA
    Heavy metals accumulation in consumables such as water, fish and plants are a threat to public health since their consumption is considered a primary route of human exposure to Potentially Toxic Elements (PTEs). This study investigated the physicochemical properties and concentrations of Cd, Cr, Cu, Fe, Ni, Pb Mn and Zn in a total of 204 samples comprising 60 Surface water, 60 sediments, 60 Tilapia (Oreochromis niloticus), 12 Okra (Abelmoschus esculentus) and 12 Bitter leaf (Vernonia amygdalina) samples collected from six dams in Osun State between October and November 2019. Values obtained were subjected to descriptive, bivariate and multivariate statistical analyses and also compared with WHO permissible standards. All physicochemical values for the surface water were below the WHO permissible limit except for BOD, COD and Turb which were above the WHO limit of 10, 4 and 5 mg L-1 respectively. Elemental concentrations in surface water were below the WHO limit except for Cd (0.006 mg L-1) at one site and Ni (0.03 - 0.04 mg L-1) for approximately 67% of the sites. Also, elemental concentrations in sediments were greater than the WHO limits except for Cu and Cr. Although the average concentrations of PTEs in plants were below WHO permissible limits, average concentrations of PTEs in fish exceeded the WHO maximum permissible levels of 0.7, 0.6, 0.3 and 0.3 mg kg-1 for Cr, Ni, Cd, and Pb respectively. Generally, PTEs concentrations in fish were in the decreasing order of Ni > Cd > Pb > Cr and the mean concentrations of Cr, Ni, Pb, and Cd ranged from 1.18 to 2.31, 3.15 to 3.92, 2.36 to 3.73 and 0.41 to 14.2 mg kg -1 respectively. Furthermore, human health risk assessment data revealed that the consumption of Tilapia, Okra and Bitter leaf from these dams are not safe for consumers. Keywords: Trace metals, Edible vegetables, Fish, Hazard quotient, Dams. Word Count: 299
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    Internal Control System and Performance of Listed Money Deposit Bank in Nigeria
    (Lead City University, 2023-12) Abdul Dimeji, ISHOLA
    The aim of the study is to investigate into the Internal Control System and Performance of Listed Money Deposit Banks in Nigeria, with a particular emphasis on the impact of COSO components of internal control on the performance metrics of bank efficiency, operational performance, and asset safety in Nigerian listed money deposit banks (MDBs). The study was guided by both control theory and agency theory, particularly anchored on agency theory. The study employed a descriptive survey research approach, with a population of 1,502 staff members from all head offices of the eight selected DMBs with international authorization. The sample size for this study was 316, determined using the Taro Yamane sampling size technique. The study focused on all staff members at the head offices of the eight selected DMBs with international authorization. Purposive sampling was utilized to target at least one branch of each of the eight DMBs in, Nigeria that have international permission. Simple percentages, correlation analysis, and regression analysis were used to examine the data gathered. Positive relationships are found between internal control system components and bank efficiency, operational performance, and asset safety (p 0.05). Risk assessment enhances bank efficiency and operational performance, but has little influence on asset safety. The internal control system has a substantial effect on bank efficiency (F(5, 305) = 36.880, p.001), operational performance (F(5, 305) = 29.361, p.001), and asset safety (F(5, 305) = 38.998, p.001). Finally, the internal control system has a significant impact on the performance of Nigerian deposit money banks (DMBs), with the Control Environment, Monitoring Activities, Risk Assessment, Control Activities, and Information and Communication variables all playing important roles in improving bank efficiency. It is advised that DMBs undertake frequent training and development programs, incorporate best and trending evaluation approaches, and create partnership with regulatory agencies to further improve their performance efficiency. Keywords: Internal Control System, Internal Control Components, Performance, Bank Efficiency, Operational Performance, Asset Safety Word Count: 300