Browsing by Author "Ige, OO"

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    Hydrogeophysical Assessment of Groundwater in a Basement Complex of Southwestern Nigeria
    (Department of Geology School of Physical Sciences, Federal University of Technology, Minna, 2021) Ige, OO; Abubakar, HO; Olatunji, S
    Hydro-geophysical investigation of a fractured basement involving the Very Low-Frequency Electromagnetic (VLF-EM) and the electrical resistivity methods has been carried out within Oye Ekiti town, South-western Nigeria. This study demonstrates the effectiveness of integrated geophysical investigation in groundwater potential assessment in a typical basement complex environment. This was done to access the groundwater potential of the area. Fourteen (14) VLF-EM and Horizontal Profiling (HP) traverses were established. Thirty-one (31) Vertical Electrical Soundings (VES) were conducted at the investigated site. The VLF-EM data were presented as profiles and 2-D images. Horizontal Profiling data were also presented as profiles while the VES data were presented as geologic sections. The VLF-EM profiles and 2-D images identified conductive zones which were confirmed by the subsurface geologic sections developed from the investigation results of the VES. The geologic sections delineated Frye's subsurface geologic layers. These include the topsoil, laterites, sandy clay, weathered basement, and fresh basement. The weathered basement constitutes the main aquifer unit within the study area. The weathered layer is generally thin and clayey. The relatively low weathered basement resistivity could indicate enhanced permeability due to significantly fractured density and the tendency for moderate groundwater potential and yield through the groundwater potential map.
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    Hydrogeophysical Assessment of Groundwater in a Basement Complex of Southwestern Nigeria
    (Department of Geology School of Physical Sciences, Federal University of Technology, Minna, 2021) Ige, OO; Abubakar, HO; Olatunji, S
    Hydro-geophysical investigation of a fractured basement involving the Very Low-Frequency Electromagnetic (VLF-EM) and the electrical resistivity methods has been carried out within Oye Ekiti town, South-western Nigeria. This study demonstrates the effectiveness of integrated geophysical investigation in groundwater potential assessment in a typical basement complex environment. This was done to access the groundwater potential of the area. Fourteen (14) VLF-EM and Horizontal Profiling (HP) traverses were established. Thirty-one (31) Vertical Electrical Soundings (VES) were conducted at the investigated site. The VLF-EM data were presented as profiles and 2-D images. Horizontal Profiling data were also presented as profiles while the VES data were presented as geologic sections. The VLF-EM profiles and 2-D images identified conductive zones which were confirmed by the subsurface geologic sections developed from the investigation results of the VES. The geologic sections delineated Frye's subsurface geologic layers. These include the topsoil, laterites, sandy clay, weathered basement, and fresh basement. The weathered basement constitutes the main aquifer unit within the study area. The weathered layer is generally thin and clayey. The relatively low weathered basement resistivity could indicate enhanced permeability due to significantly fractured density and the tendency for moderate groundwater potential and yield through the groundwater potential map
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    Process Conditions Governing the Drying Rate of Tomato Powder Obtained from Foam-Mat Dried Tomato Paste
    (National University of Food Technologies (NUFT), Ukraine., 2015) Olaniyan, AM; Sunmonu, MO; Odewole, MM; Ige, OO
    Introduction. One of the most effective ways of reducing postharvest losses in food materials is drying. However, prolonged time of drying has the tendency of reducing the quality characteristics of highly perishable produce like tomato. Materials and methods. Fresh tomato (“dan UTC” variety), foaming agent (egg white), foam stabilizer (Carboxyl Methyl Cellulose), digital scale (OHAUS 3001), laboratory air-oven (model MINO50–10G039), blender (400 W, model number FPO12A). Vitamin C and protein content were determined using AOAC (2002) standard. Results and discussion. Increase in the quantity of foaming agent (from 5 – 10 %) caused a decrease in drying rate from 20.63 g/h to 18.57 g/h, however, a further increase in foaming agent (10-15 %) caused the drying rate to increase from 18.57g/h to 20.63g/h. Increase in the percentage of foaming agent (5 % to15 %) led to a slight increase in the values of protein content (from 24.65% to 24.7889 %).Increase in the quantity of foaming agent did not cause the vitamin C content of the dried tomato powder to fall below 1.3 %, however, as the foaming agent increased, the vitamin C content showed a reduction in its values. Increase in the percentage of foam stabilizer (0.15 – 0.75 %) caused an increase in drying rate from 19.33 g/h to 20.62 g/h. The trend in drying rate was also noticed for protein content only that no significant effect in the mean values was noticed at 0.15% (24.69 %) and 0.45% (24.72 %) of foam stabilizer. For vitamin C content, all the mean values were between 1.4 % - 1.49% as the foam stabilizer increased from 0.15 to 0.75 %. Increase in whipping time (3 min to 7 min) caused a progressive increase drying rate (18.9411 g/h to 20.67 g/h) and protein content (24.71 % to 24.72%). However, the vitamin C content did not reduce below 1.4% with increase in whipping time. Conclusions. Increase in foaming agent (egg white), foam stabilizer (carboxyl methyl cellulose) caused the drying rate and protein content of the foam-mat dried tomato powder to increase to values not below 20 g/h and 24 % respectively. However, the mean vitamin C content reduced but was not less than 1.3 %.