Abstract This study highlights the distribution of hydraulic conductivity (K) in the regional aquiferous Ajali Formation of SE-Nigeria on one hand and assesses the possible influences of textural and geochemical characteristics on the hydraulic conductivity on the other hand. The investigation approach involved field sampling and collection of 12 sandstone samples from different outcrop locations, followed by laboratory studies such as grain-size analysis (GSA), constant head permeameter test...
ABSTRACT Recent developments indicated increasing gene-pool depletion for most medicinal plants in Nigeria despite their pharmaceuticals and therapeutic potentials. Initial socio-economic study involving three countries (Nigeria, Ghana and Republic of Benin) identified ten most frequently used medicinal plants. This list was superimposed on a vegetation map of Nigeria for the production of a distribution map ahead of an eco-geographic survey for population and phenological studies. Sample sit...
ABSTRACT Eighty-eight divalent metal complexes derived from dihydrazides of oxalic, malonic, succinic, adipic, phthalic and :erephthalic acids, with manganese( 11), cobalt(ll), nickel(ll), copper(IJ), zinc(ll), cadmium(ll), mercury(ll) and magnesium tetrafluoroborates have been prepared. The effect of 1 :1 and 1:2 metal to ligand reactant ratios have been examined. The complexes have been characterized on the basis of their analytical data, magnetic susceptibility, electronic and IR spectral ...
Abstract A simulation study on the effect of the “bull’s eye” in ductile iron on stress concentrations was done in this work. Using the model of graphite nodules in a cavity, a two dimensional plate strip was subjected to plane stress conditions. The results were compared to the traditional theory of modeling the graphite as holes (cavity) in the iron matrix. In plane stress conditions, while the graphite in the hole model showed the hole as areas of stress concentration and therefore v...
ABSTRACT Osun River is important for domestic, recreational and other activities. It flows along a channel that may be polluted by inputs from industrial, agricultural and other anthropogenic activities thereby limiting its normal use for drinking, fishing, recreation and other purposes. Available literature on the river quality is limited in scope, frequency of sampling and duration of studies. Therefore, a study of the river and its tributaries was carried out to determine the spatial and t...
ABSTRACT Exposure to certain hexavalent chromate compounds (HCC) causes lung and colon cancers. Their mechanisms of cytotoxicity are unclear, but believed to be affected by ascorbate and particle size. However, their role is not clearly defined. Co-exposure with sodium arsenite (SA) is common, but its effect on HCC toxicity is unknown. Current therapy has side effects, necessitating the search for antidote from unexplored natural products such as Rauvolfia vomitora (RV). This study therefore ...
ABSTRACT This dissertation contains materials on numerical solutions to partial differential equations only appropriate for senior level undergraduate. The reader based on this dissertation should have had introductory courses in Calculus, linear algebra and general numerical analysis. A formal course in ordinary or partial differential equations would be useful. In our study, it should be understood that, there are many procedures that come under the name numerical methods. We shall see how...
ABSTRACT Attribute sampling plans on quality indices like AQL and MAPD gives the way for Sustainable Quality Region especially for the product at initial stage of production, where the exact quality of the product was not well designed. Optimum information on Acceptable quality level (AQL) and Maximum allowable percent defective would be better for protecting both consumer and producer in terms of SQR along with AQL or MAPD. New single sampling plans were developed by suggesting a unique mon...
ABSTRACT The objective of this study is to investigate the effects of chemical reaction on an unsteady hydro - magnetic natural convection heat and mass transfer flow of incompressible, viscous, rotating and radiating fluid past an infinite vertical porous flat plate in the presence of heat sink. The Rosseland approximation is used to describe the radiative heat flux for optically thick fluid in the energy equation. The system of non - dimensional partial differential equations governing the...
Abstract - Chemical analysis and nutritional assessment of defatted Garcinia mangostana seeds (DGMS) were undertaken to determine its suitability as an additive at 0.00g, 18.00g, 36.00g, 54.00g and 72.00g inclusion levels in diets and performance of Clarias gariepinus post juveniles. Proximate analysis of DGMS showed that the defatted seeds were high in carbohydrate (71.00 ± 0.79%) but low in protein content (8.10 ± 0.22%). The mineral element analysis detected different minerals with potas...
The environmental audit of the Tunu/Kanbo area of Niger Delta, Nigeria was carried out to assess the impact of logging and timber exploitation in the area. The audit showed a high loss of endangered, threatened and economic forest species in the area; e.g Terminalia superba. The unlawful logging and “forest abuse” common in the area is detrimental to conservation of biodiversity attempts and ideals. It is recommended that regeneration efforts be put in place and intensified so as to esche...
ABSTRACT Online Social Networks (OSN) provides active space for digital human interaction and are used daily. Human engagement is reflected by exploiting the dynamics of OSN, where the fundamental problem is to infer future interactions on the network, called link prediction. Most studies have employed classical algorithms which consider node similarity but neglected the link analysis algorithms which consider topological structure. This study focused on the comparative study of predicting r...
Accurate collection of wind speed records is significant for numerous wind power applications. The present investigation aims to highlight the use of the Marshall–Olkin Power Lomax (MOPLx) distribution for wind speed data. We examine the actual wind speed records gathered from three stations Bahawalpur, Gwadar, and Haripur. The dataset is demonstrated by using MOPLx distribution and compare its modeling performance with renowned probability distributions, for example, Weibull– Lomax, powe...