Mfon Douglas | University of Uyo, Uyo, Nigeria (original) (raw)
Papers by Mfon Douglas
Kerta Cendekia Nursing Academy, Jul 15, 2019
he cultivation of edible plants in a contaminated environment and the processing of foods have co... more he cultivation of edible plants in a contaminated environment and the processing of foods have contributed significant level of toxic metals to the consumers. This study investigated the level of Pb, Zn, Cu, Cd, and Fe in Cucumis sativus, Solanum melongena, Arachis hypogaea, Capsicum annum, and Solanum lycopersicum from the northern and southern parts of Nigeria using atomic absorption spectrophotometer. Mean concentrations (mg/kg) of these metals obtained were as follow: Pb (0.009 ± 0.012), Zn (0.759 ± 0.394), Cu (0.015 ± 0.010), Cd (0.040 ± 0.022) and Fe (0.211 ± 0.030). The results revealed higher but insignificant levels of all the metals except Cd in vegetables from the northern part than those from the south at p < 0.05. The mean values of all the metals were within the acceptable limits by FAO/WHO. The principal component analysis (PCA) identified two major factors responsible for the accumulation of these metals in the studied vegetables. The correlation and cluster analyses showed variable correlations among the metals determined. The levels of metals determined in studied vegetables reveals that the studied vegetables from both parts of the country are safe for consumption however, bioaccumulation should be avoided. Keywords: Trace metals, Multivariate analysis, Vegetables, Atomic Absorption Spectrophotometer, Nigeria
Ecologica Montenegrina, 2019
The red deer is a main game species in Bulgaria, as well as in large parts of Europe. However, it... more The red deer is a main game species in Bulgaria, as well as in large parts of Europe. However, its behaviour has not been studied in depth on a local scale, especially on the Balkans. This study presents the first GPS telemetry data for red deer in Bulgaria –in the Central and Eastern Balkan Mountains, the Rhodopi Mountains and the lowlands of North-eastern Bulgaria. 18 individuals (2 subadult stags, 12 adult stags and 4 adult hinds) were tracked, accumulating a total of 1159 (for males) and 1464 (for females) GPS fixes. In spite of the pronounced individual differences, all stags were more mobile (average step length/12 h = 857 m) and had larger home ranges (average HR = 7393 ha) than hinds (average HR = 2085 ha, average step length/12 h = 448 m). Three of the individuals (1 hind and 2 stags) dispersed, forming two distinct home ranges. The results from this study outline the need for detailed studies on the behavior of the species, as a vital part of its management and conservation.
World Journal of Advanced Research and Reviews, 2020
Vegetables are consumed in both the developing and developed countries of the world due to their ... more Vegetables are consumed in both the developing and developed countries of the world due to their high nutritive values, however they also contain some high levels of toxic substances including metals. This research examined the variations in toxic metal loads between the vegetables from the southern and northern parts of Nigeria consumed in Akwa Ibom State. This study also assessed the sources of these toxic metals in the studied vegetables from both regions of the country. The cancer and non-cancer health risks related to the consumption of these vegetables by the adults and children populations were investigated. The results showed higher levels of As, Cd, and Ni in vegetables from the North than in the South; the levels of Cr were higher in vegetables from the South, whereas the levels of Pb varied between the vegetables from both regions. The difference in the variations in toxic metal levels was significant at p < 0.05 for As and Ni. The study identified two major separate factors responsible for the accumulation of toxic metals in the studied vegetables from both regions. The results also revealed that the consumers of these vegetables were not exposed to serious cancer and non-cancer health risks however, were exposed to more Cd via the consumption of Solanum lycopersicum. It was also observed that the consumers were more expose to the carcinogens through the consumption of vegetables from the north and the children were more susceptible.
Kerta Cendekia Nursing Academy, Jul 15, 2019
he cultivation of edible plants in a contaminated environment and the processing of foods have co... more he cultivation of edible plants in a contaminated environment and the processing of foods have contributed significant level of toxic metals to the consumers. This study investigated the level of Pb, Zn, Cu, Cd, and Fe in Cucumis sativus, Solanum melongena, Arachis hypogaea, Capsicum annum, and Solanum lycopersicum from the northern and southern parts of Nigeria using atomic absorption spectrophotometer. Mean concentrations (mg/kg) of these metals obtained were as follow: Pb (0.009 ± 0.012), Zn (0.759 ± 0.394), Cu (0.015 ± 0.010), Cd (0.040 ± 0.022) and Fe (0.211 ± 0.030). The results revealed higher but insignificant levels of all the metals except Cd in vegetables from the northern part than those from the south at p < 0.05. The mean values of all the metals were within the acceptable limits by FAO/WHO. The principal component analysis (PCA) identified two major factors responsible for the accumulation of these metals in the studied vegetables. The correlation and cluster analyses showed variable correlations among the metals determined. The levels of metals determined in studied vegetables reveals that the studied vegetables from both parts of the country are safe for consumption however, bioaccumulation should be avoided. Keywords: Trace metals, Multivariate analysis, Vegetables, Atomic Absorption Spectrophotometer, Nigeria
Ecologica Montenegrina, 2019
The red deer is a main game species in Bulgaria, as well as in large parts of Europe. However, it... more The red deer is a main game species in Bulgaria, as well as in large parts of Europe. However, its behaviour has not been studied in depth on a local scale, especially on the Balkans. This study presents the first GPS telemetry data for red deer in Bulgaria –in the Central and Eastern Balkan Mountains, the Rhodopi Mountains and the lowlands of North-eastern Bulgaria. 18 individuals (2 subadult stags, 12 adult stags and 4 adult hinds) were tracked, accumulating a total of 1159 (for males) and 1464 (for females) GPS fixes. In spite of the pronounced individual differences, all stags were more mobile (average step length/12 h = 857 m) and had larger home ranges (average HR = 7393 ha) than hinds (average HR = 2085 ha, average step length/12 h = 448 m). Three of the individuals (1 hind and 2 stags) dispersed, forming two distinct home ranges. The results from this study outline the need for detailed studies on the behavior of the species, as a vital part of its management and conservation.
World Journal of Advanced Research and Reviews, 2020
Vegetables are consumed in both the developing and developed countries of the world due to their ... more Vegetables are consumed in both the developing and developed countries of the world due to their high nutritive values, however they also contain some high levels of toxic substances including metals. This research examined the variations in toxic metal loads between the vegetables from the southern and northern parts of Nigeria consumed in Akwa Ibom State. This study also assessed the sources of these toxic metals in the studied vegetables from both regions of the country. The cancer and non-cancer health risks related to the consumption of these vegetables by the adults and children populations were investigated. The results showed higher levels of As, Cd, and Ni in vegetables from the North than in the South; the levels of Cr were higher in vegetables from the South, whereas the levels of Pb varied between the vegetables from both regions. The difference in the variations in toxic metal levels was significant at p < 0.05 for As and Ni. The study identified two major separate factors responsible for the accumulation of toxic metals in the studied vegetables from both regions. The results also revealed that the consumers of these vegetables were not exposed to serious cancer and non-cancer health risks however, were exposed to more Cd via the consumption of Solanum lycopersicum. It was also observed that the consumers were more expose to the carcinogens through the consumption of vegetables from the north and the children were more susceptible.