Abstract This study utilized combination of phase plots,time Steps distribution and adaptive time steps Runge-Kutta and fifth order algorithms to investigate a harmonically Duffing oscillator.The object is to visually compare fourth and fifth order Runge-Kutta algorithm performance as took for seeking the chaotic solutions of a harmonically excited Duffing oscillator.Though fifth order algorithms favours higher time steps and as such faster to execute than fourth order for all studied cases.T...
ABSTRACT Life threatening diseases like, cancer, diabetes, cardiovascular and neurodegenerative diseases have been linked to oxidative stress in the human body. Oxidative stress results from the uncontrolled generation of reactive oxygen species (ROS) in the body. Naturally, the normal body regulates ROS through in situ production of antioxidants. However, the human body is not capable of quenching ROS exceeding a certain level and this can result in oxidative stress. Hence the need of exogen...
ABSTRACT Testing for homogeneity of proportions in handling over-dispersion is employed in toxicology, teratology, consumers purchasing behavior, alcohol drinking behavior, in studies of dental caries in children and other similar fields. An important inference problem of interest is to compare proportions of certain characteristic in several groups. However, these proportions often exhibit variation greater than predicted by a simple binomial model. In real world applications, the binomial ...
ABSTRACT Maize is the main staple food crop in Kenya and is of vital concern to agricultural policy decisions, food security and overall development of the sector and the economy. It is also the dominant staple food crop in Kuria east sub-County. However, there has been a declining trend in maize production among farmers in the study area threatening household food security. This study was conducted in Kuria east sub-County using cross sectional survey research design and sought to achieve th...
ABSTRACT The study area is located in Nsukka Local Government Area of Enugu State Nigeria. It lies between latitudes 6° 49' N, and 6° 50' N, and longitudes 7° 15' E, and 7° 21' E respectively. The area is underlain by Nsukka Formation, which is capped by the laterites, and underlain by heterolithic Sandstone / Siltstone layers with some clays or shale at some deeper horizons. Geophysical investigation using Electrical Resistivity and IP methods with ABEM Terameter, SAS 1000, reveal...
ABSTRACT The Nsukka area is a sedimentary basin within the Anambra basin which is part of the lower Benue trough. The Nsukka sheet (covering the aeromagnetic data of Nsukka) lies between latitudes 6030΄ and 7000ʹNorth and longitudes 7000ʹ and 7030ʹEast. The IGRF corrected aeromagnetic data ofNsukka sheet, southeastern Nigeria has been interpreted using the standard Euler deconvolution, source parameter imaging,forward and inverse modelling methods with the objectives of determining the d...
ABSTRACT The syntheses of benzothiazinophenothiazine derivatives from simple heterocyclic compounds as precursors is described. Condensation of 2-aminothiophenol with 2,3-dichloro-1,4-naphthoquinone in an alkaline medium furnished a good yield of the intermediate, 6-chloro-5H-benzo[a]phenothiazin-5- one. Further condensation of the intermediate with 2,4-diamino-6-hydroxypyrimidine-5-thiol obtained by alkaline hydrolysis of 2,4-diamino-6-hydroxy-5-thiacyanatopyrimidine gave the benzothiazinop...
Abstract A discussion of somc burial and thermal history modelling techniques is given, together with the applicability of these to some sedimentary basins in Nigeria. The rilcchanisms of basin formation discussed follow the basic concept that basin subsidence is an isostatic response to thinning of the crust and cooling of a thermal anomaly. The rate of subsidence! is mainly a function of thc cooling rate, further modificd by additional load related to replaccrnent of sea water by accumulati...
ABSTRACT In this study, instant kunun zaki powders were produced from millet-cowpea malt and millet- soybean malt. The instant powders were packaged in polypropylene plastics and stored for 3 months. During this period, studies of the changes in physiochemical and functional properties of the packaged flour were carried out every 30 days for 3 months. Production of instant powders was by blending millet with malt of cowpea for millet cowpea malt (MCm) and millet with malt of soybean for mill...
ABSTRACT Amplitude variation with offset (AVO) attributes analysis, based on integration of geophysical and petrophysical data has become an important and innovative tool for the detection of hydrocarbons in many exploration provinces of the world, including the Niger Delta Basin. The method has been demonstrated to be effective when seismic data processing is carefully done with detailed petrophysical modeling from complete well log suites. However, routine application of the method has fro...
ABSTRACT Investigations were carried out for groundwater potentials and hydro-geochemical characteristics of the Nanka-Oko area and environs, southeastern, Nigeria. The areas are underlain by the Nanka Sands Formation. Data from 14 vertical electrical soundings were interpreted using computer aided techniques (IPI2win software). A total of 16 borehole groundwater samples, were also analyzed for their phys...
ABSTRACT The share prices of the stock market are volatile in nature. Investors are at risk without an indepth knowledge of the operations of the stock market. We used regression analysis to ascertain the relationship between the movement of share prices and economic growth. A regression model was developed to capture the effect of the movement of share prices in the Nigerian stock exchange market on economic growth. Markov chain was used to find effect of the share prices. The results show ...
ABSTRACT The purpose of the study was to evaluate the radioprotective effects of Gongronema latifolio (GL) leaf extract on a whole-body irradiated wistar albino rats. A prospective experimental and cross-sectional design was adopted for this study and it included a control group and experimental group. Part of the control group (normal control NC) was not irradiated neither was it administered with GL extract but the other part (experimental control EC) was only exposed to graded radiation ...
Soil transmitted helminths infections are a major public health challenge in developing countries especially those confined to the tropics. These infections include the three common intestinal parasites namely: Trichuris trichiura, Ascaris lumbricoides, and hookworm (Ancylostoma duodenale and Necator americanus). Soil transmitted helminths are among the neglected tropical diseases that infect the less privileged populations whose risk increases with poor hygiene and sanitation. Helminths...
The Tea Research Institute (TRI) developed TRFK 306 tea clone which is rich in anthocyanin as a strategy to diversify Kenyan teas. TRFK 6/8 was used as a control in the study being a standard clone used at the TRI. TRFK 306 can be utilized non-processed but there is no well researched, documented data on the best brewing conditions. Consumers add edible acids to its brew to improve the colour and taste but information on the acid effect is scanty. Information on the quality of products m...