ABSTRACT A geochemical study of Nkalagu limestone of the Lower Benue Trough as exposed at Nigeria Cement Company (NIGERCEM) was carried out. The study aims at the determination of major oxides and trace elements of the limestone exposed in the quarry using X–Ray Fluorescence Spectrophotometer (XRF) and Atomic Absorption Spectrophotometer (AAS) respectively as well as reconstructing the depositional history of the deposit. Petrographic study was also done to enhance the determination of biog...
Abstract The quantity as well as the quantity of clean water supply is of vital significance to the welfare of mankind particularly in the developing countries. Therefore, knowing the concentration of heavy metals present in Dams can help us to ascertain the health safety of the populace using the water for drinking and domestic purposes. Ten Dams at Oyo State in the Southwestern Nigeria were studied for the heavy metals concentration contained in the sediments and water of the selected Dams....
ABSTRACT The effects of the liver tumour promoter, dicophane, with those of low protein intake (LPI) 2+ on the functional expression of rat liver microsomal Ca -ATPase were compared. The effects of dicophane and LPI on the activity of the microsomal enzyme after carcinogenic initiation by pretreatment with aflatoxin B (AFB ), a genotoxic liver carcinogen, were also 1 2+ compared. The Status of membrane - bound Ca -ATPase of erythrocytes of humans having primary liver cancer (PLC) and kwashior...
Abstract Metallothionein-1 (MT-1), cytochrome P450-2A (CYP2a) and other genes are involved in the detoxification of xenobiotics such as heavy metals and toxins. Changes in their expression precede overt toxic effects and can serve as a marker for exposure to pollutants. We used a mouse experimental system and quantitative reverse transcription polymerase chain reaction to determine changes in gene expression and the direction of change, in response to exposure to lead acetate (LA) and waste ...
ABSTRACT Use of open land as dump sites by the manufacturing industries in developing countries without appropriate prevention of environmental hazards has resulted in prominent levels of waste and disposal effluents. This has resulted in the contamination of soil and the exposure of human populations to environmental and health hazards. This study focused on the investigation of soil contamination by heavy metals via waste disposal of a lead battery factory in Lalupon, Oyo State, Nigeria. Co...
ABSTRACT Researches have shown that dried cassava varieties are relatively susceptible to Prostephanus truncatus (Horn) infestation. Laboratory studies were conducted to determine weight loss and nutritional status of dried cassava chips (TME-7) and P. truncatus emergence rate over an infestation period of 8 weeks. TME-7 mean weight loss (±SD) rose to 11.30% ± 4.01 (22.67%) with P. truncatus mean emergence rate (± SD) of 18.50 ± 8.25; 16.33 ± 6.85 and 9.93 ± 3.30 for larvae, pupae and a...
Abstract Possible control of Oryzaephilus surinamensis infestation on date palm (Phoenix dactyliferai using oil palm inflorescence ash and hermetic storage technique combined with Oil Palm Inflorescence Ash (OPIA) treatment were conducted in the Entomology Laboratory, Department of Zoology, University of Ibadan, Oyo state, Nigeria. Relative efficacy of oil palm inflorescence ash at 0.625 g 125 g and 1.25 g 125 g and 3 bags layer hermetic storage technique combined with oil palm inflorescence...
ABSTRACT The need for meat preservation cannot be overemphasised. However, existing methods of meat preservation including the use of artificial preservatives have toxic side effects. There is a dearth of information on the use of Lactic Acid Bacteria (LAB), which is known as good preservatives for food, in the preservation of meat. Hence, the aim of this study was to examine the use of Pediococcus acidilactici and low temperature in improving the quality of beef, chicken and turkey meat sam...
ABSTRACT The Bayesian approach conveys information not available in the data but on prior knowledge of the subject matter, which enables one to make probability statements about the parameters of interest, while the classical approaches deals solely with the data. Several researches on the classical approaches have shown them to be sensitive to multicollinearity, a violation of one of the assumptions of multi-equation models which often plagues economic variables. Studies on the performance ...
ABSTRACT This study involves the use of geophysical well logs to characterize four reservoir sand bodies contained in four wells offshore Western Niger Delta. The well logs include caliper, SP, gamma ray, resistivity, neutron (NPHI), density (RHOB) and sonic logs. The logs were obtained in digital data format and a Paradigm's petrophysical software, Geology was used to process the data into logim ages. This aided the visual identification of lithologies and potential reservoirs. The reservoir...
ABSTRACT Flow rate of salt-water and fresh-water through porous media depends on the hydraulic gradient, porosity and hydraulic conductivity of the sand materials and the properties of the fluids such as density and viscosity. This study examined flow rate of salt-water and fresh-water in porous media in a modeled laboratory experiment. Porous materials were filled into the conduit of two arms glass cylindrical tube with valve (control) at the middle. Salt-water and fresh-water were made to ...
Abstract Darcy's law is an essential equation in determining the permeability of porous media, which is vital tool in seepage and drainage control in soils. However, whenever the aggregate sizes of the porous media and hydraulic gradient are large, the flow in drains will be semi-turbulent to turbulent. This research aims at modifying the true Darcy's permeability determined under small hydraulic gradients that ensure laminar or nearly laminar flow to allow for reduced efficiency caused by t...
ABSTBACT This study evaluated the association of HXV-1 infection with some other sexually transmitted diseases (STDs) among femaIe commercial sex workers. BIood samples were collected from 250 female commercial sex workers in Ibadan Oyo State, Nigeria and tested for the presence of HEV antibodies using ELJSA and Western blot. Endocervical and high vaginal swab samples were also collected for microscopy and culture. The prevaIence of HIV-1 infection among CSWs in Ibadan, Nigeria was 25.6% wit...
ABSTRACT The presence and possible effect of heavy metal (such as cadmium, zinc, lead, e.t.c) concentration in the clay used in pot making were investigated. Clay samples were collected at three locations where they are used mostly in making pots and other kitchen utensils. The concentrations of heavy metals were determined using the Atomic Absorption Spectrometer (AAS). Results indicate that the concentration Cu, Zn, Cr, Pb, As, and Mn falls within the range of the maximum admissible concen...
ABSTRACT Macrophytes such as Eichhornia crassipes and Pistia stratiotes are known bioaccumulators found in the Ologe Lagoon which receives effluents mainly from Agbara Industrial Estate. However, the mechanism of heavy metal bioaccumulation by these macrophytes has not been fully understood. This study was designed to determine the mechanism of heavy metal bioaccumulation and model the phytoremediation capabilities of the macrophytes. Five sampling stations: Owo (before the point of dischar...