ABSTRACT Ionizing radiations resulting from either natural or artificial radioactivity are useful but associated with them are health risks which increase with exposure. The natural radioactivity levels in soils of some locations in Jos and Abeokuta are significantly higher than the world average. Enhanced internal and external radiation exposures to man may result from physical presence in, and ingestion of food items grown in these areas. Scientific data are sparse on the radionuclide conte...
ABSTRACT: Tuberculosis is a global burden with one –third of the world’s population infected with the pathogen Mycobacterium tuberculosis and an annual 2 million deaths from the disease. This high incidence of infection and the increased rate of resistant strains of the organism (MDR- and XDR- TB) have called for an urgent need to develop new anti-tuberculosis drugs from plants. The crude extract of Uvaria afzelli Scott Elliot (Annonaceae) root bark, and leaves and root bark of Tetracera ...
Abstract Thls artlcle introduces Monte Carlomethds which are duerent from conrentio~nl ~mieticanl lethods andshow bow some of the methods can be applled in Physlcs,ro simrclate or solve physical proble~its. thtwr~hco rrilvrrer ~vrgrrrr>rr' (wrltten In FORTRAN In thls ca.r@, by ruing a few cxnml~lrrt oltchinff ,n doi.11 arid c/ns.~l[:olI 'lr~!!:ricrsh r~t~.rrr~s ~g r~lrfihess. A functional approach to probab//ity and statisticscl is describeJJor the p,1rynre o/tbn work r*.st~nd of comp/eto tre...
Abstract Subsurface samples from the Akinside 1582 well, located within the eastern Dahomey Basin were evaluated to determine the lithofacies, depositional environment, and hydrocarbon potential of the basin. The sediments within the interval 138-197m consist of limestones, shales, mudstone and glauconite; thus representing sediments belonging to the Ewekoro and Akinbo Formations. The limestones are greyish, highly indurated, partly recrystallised and reveal six microfacies notably biosparite...
ABSTRACT A sequence of conglomerates, sandstones, slltstones, claystones carbonaceous shales and mudstones which rims the Oban Massif in the Calabar Flank, constitutes the Early Cretaceous (probably Aptian) Awi Formation In the southeastern Nigeria. Field studies and laboratory analyses were conducted on these sediments to determine their provenance and depositlonal environment. Field observations show that the sediments are grently dipping (.< 16°) in a southwesterly direction. They vary in...
ABSTRACT Clays have some properties which make them good adsorbents. The adsorption of heavy metal ions by clay usually affects its thermal properties and these properties have direct influence on seed germination and crop growth. In this study, the variation of thermophysical properties of clay with adsorption of some heavy metal ions at different concentrations was investigated. An Atomic Absorption Spectrophotometer (AAS) was used to determine the concentrations in the samples. A known mas...
ABSTRACT Cultivation of Jatropha curcas L. for production of biodiesel as an alternative source of energy is crucial for sustainable development in Nigeria. Pests and pathogens especially fungi have been reported to be a major constraint to commercial cultivation of J. curcas in Asia and some West African countries. However, this is yet to be fully investigated and documented in Nigeria. Fungal pathogens infecting J. curcas in southwestern Nigeria were therefore investigated. Two hundred plan...
ABSTRACT The major purpose of this study was to determine the teacher initiatives for utilizing ICTs in teaching and learning in Colleges of Education in Delta State. Four research questions were answered and four null hypotheses were tested at 0.05 level of significance. The population for the study consisted of 2035 made up of 610, 723 and 702 teaching staff from Federal College of Education (Technical), Asaba, College of Education, Agbor and College of Education, Warri respectively, the t...
ABSTRACT This study investigated the effect of exposure to crude oil on rats experimentally infected with Trypanosoma brucei brucei. Thirty (30) adult male albino rats weighing 165 ± 15.0g were used for the study. They were kept in metal cages in a fly-proof house and fed with proprietary rodent diet and given water ad libitum. The rats were divided into five groups (AE) of six rats each. Groups A and B represented the uninfected-unexposed and infectedunexposed controls respectively, wherea...
ABSTRACT This study assessed the dimensions of e-learning programmes of Technical and Vocational Education and Training (TVET) in South East Universities of Nigeria. The study adopted a survey research design. The population for the study is comprised of 112 TVET lecturers in all the Federal and State Universities in the South-East Zone of Nigeria that offer TVET programme. Eight research questions and four hypotheses formulated to guide the study. A structured questionnaire titled extent of...
Abstract This work reports on the Web-based undergraduate mathematics tutor developed by the author for use by the undergraduates of the Computer science department in higher educational institution. It briefly analyses the traditional method of teaching undergraduates mathematics and uses ideas so gathered to design a new one. The new method allows students to learn mathematics interactively, and at their own pace via technologically-based system. Their understanding in mathematics will inc...
Abstract Reliable estimates of petroleum reserves are invaluable in reservoir management decisions and economic evaluation. Classical decline curve analysis techniques have been routinely used and are generally accepted in the industry to reliably estimate developed reserves up to a predetermined economic limit qec in oil wells. However Decline curve analysis techniques are based on the assumption that past production trends and their controlling factors will continue in the future and theref...
ABSTRACT A transition length is normally observed when fluid flows through a conduit before laminar flow is accomplished. This work examined a situation whereby porous materials were filled into the conduit and fluid was made to flow through. An attempt was made to determine this transition length for flow of water through riverbed sand of varying porosities filled into a horizontal cylindrical pipe of diameter 0.345 x m with piezomefric water head, set at 0.06m. The transition length was obs...
ABSTRACT Heavy metal contamination in soil may be reflected in food crops due to plant uptake and such crops when consumed may cause adverse health effects. The assessment of toxic metal burden of soils and the capacity of food crops to accumulate these metals are essential. Such studies have not been reported in literature for Kogi State, a state noted for intense agricultural activity. The aim of this study was to determine heavy metals in soils, food crops, irrigation waters and sediments ...
ABSTRACT Austenitic stainless steels with excellent corrosion resistance and good weldability have wide applications in industry. These iron-based alloys contain a high level of chromium which form protective oxide film on the surface hence resisting corrosion. The oxide film regenerates when damaged, making the steel 'stainless'. However, carbide precipitation due to a welding process or heat treatment can cause the occurrence of chromium-depleted zones at the boundaries, leading to a phenom...