ABSTRACT This study describes the validation of a sybr green-1 based in vitro test of susceptibility of Plasmodium falciparum to antimalarial drugs. The assay was evaluated by determining fluorescence development at various ranges of parasitaemia of 3D7 clones incubated with sybr green in the dark. The flourescence was measured with a fluorimeter after every 1hr time interval of incubation. The effect of haemoglobin on the sybr green fluorescence was also investigated with salmon sperm DNA. T...
ABSTRACT The relationship between five randomly selected isolates of Aspergillus niger from naturally infected bulbs of shallot and two shallot cultivars (Allium ascalonicum L.) was investigated. The two cultivars were “Pale-brown” and “Pink”- named for the colours of their scale leaves. A. niger causes bulb rot of shallots which have important uses in food and traditional medicine in Ghana The relationship showed by the cultivars were similar in some aspects and different in many oth...
Abstract We show that the normal Appell subgroup of the Riordan group is a pseudo ring under a multiplication given by the componentwise composition. We develop formulae for calculating the degree of the root in generating trees and we establish isomorphisms between the four groups : the hitting time, Bell, associated and the derivative which are all subgroups of the Riordan group. We have found the average number of trees with left branch length in the class of ordered trees and the Motzkin ...
ABSTRACT Desmodium adscendens is used as prophylaxis in asthma. Earlier work in this laboratory on the scientific basis for the therapeutic action of the plant indicated that both the aqueous and alcoholic extracts were anti-anaphylactic in vitro. Since extracts of the plant are taken orally by asthmatic patients, the present work was carried out to investigate the in vivo effects of both alcoholic and aqueous extracts of D. adscendens on anaphylaxis. The methods used were the contraction of ...
ABSTRACT Although Cryptosporidium spp. infections in acquired immunodeficiency syndrome patients (AIDS) and children with diarrhoea have been reported in several African countries, there is scanty information regarding cryptosporidial diarrhoea in Ghana. This study investigated occurrence of C. parvum in HIV/AIDS patients and children up to five years with diarrhoea in the Greater Accra Region. It was a cross sectional study, with Fevers Unit, Child Health Department in the Korle-Bu Teaching ...
ABSTRACT In recent years there has been an immense public outcry over the concern of the quality of water from the Densu River and the Weija reservoir. In an attempt to study the quality of water from the Densu River and the Weija reservoir, a 2 x 5 factorial experiment with two seasons (rainy and dry) and five sources of water (Akwadum, Asuboi, Nsawam, Manhia and the Weija Dam) as variables was performed. These water samples were analysed for various physical, chemical, nutritive and microbi...
ABSTRACT For stochastic time series modelling, an essential property is the underlying statistical model that is assumed to govern the number of defective parts of printed circuit boards in a production process in the manufacturing industries in Ghana. The data was for a period spanning from 2009 to 2014. Considering time series methodology, we specify differences in the data points as a stochastic process assumed to have Markov dependency with respective state transition probabilities matric...
ABSTRACT The study was carried out in the southwestern sector of the Keta lagoon, a closed coastal lagoon located in the southeastern part of Ghana. The study was aimed at studying the population parameters and the feeding habits of the major fish species (in terms of catch) in the lagoon in relation to the prevailing physicochemical parameters and the benthic macrofauna of the area. The water physicochemical parameters studied included the electrochemical and the optical properties of the wa...
ABSTRACT The study explores the modelling of asset returns in portfolio as a stochastic process which exhibits mean reversion towards the long-term stationary mean. This can be thought of as if an asset return is connected to its long-run mean with a spring which pulls the asset return towards the long-run mean. The study investigates the stochastic nature of two assets returns by use of autoregressive and Ornstein-Uhlenbeck (OU) processes to illustrate the features of the assets weekly retur...
Abstract Linear Quadratic Control Problems are control problems with a quadratic cost function and linear dynamic sytem and a linear terminal constraint. This work looks at linear quadratic control problems without terminal conditions. We will first look at the controllability and observability of linear dynamical systems and then establish the necessary conditons for the variation in the cost criterion to be nonnegative for strong perturbations in the control. These conditions are the first ...
ABSTRACT The study assessed the outgrower model as a tool for agricultural modernization in Ghana. It further attempts to examine the effects of agricultural modernization on output, and identify the livelihood outcomes of the model on the farmers involved in the scheme as well as their communities. Over the years, the impacts of the outgrower schemes on integrating smallholder farmers into the agro processing continuum has been a subject of argument between two main schools of thought. One s...
ABSTRACT In this work the potential of harnessing electricity from solar and wind sources in Ghana is evaluated both quantitatively and qualitatively. In this regard solar, wind and other relevant data were collected (over a period of one year) from various parts of Ghana. Detailed assessment of the capacity or potential of power production from hybrid solar-wind sources is done with the use of empirical mathematical formulae and the PRO VITUS model incorporated in the ‗ENERGY X‘ software...
ABSTRACT This research study was aimed at performing dosimetry intercomparison on different CT scanners in the diagnostic radiology departments of Korle-Bu Teaching Hospital (KBTH), Sweden Ghana Medical Center (SGMC) and Global Medical and Imaging Center (GMIC).Using the standard body phantom and integrated ion chamber technique volume computed tomography dose index (CTDIvol) and Dose-Length Product (DLPs) within the phantom were evaluated. The ion chamber technique was applied to two 16 slic...
ABSTRACT Ghana, like most developing countries is undergoing rapid urbanization. This rapid increase in the urban population has exerted severe pressure on most cities‟ limited infrastructure, the consequence of which includes the mushrooming of informal and slum communities. In the main, most dwellers in these settlements have become vulnerable to a wide range of disaster risks particularly fire hazards largely because of the poorly constructed makeshift dwellings. The study was concerned ...
ABSTRACT The development of unauthorized structures has become one of the threatening problems associated with urbanization in developing countries. Multiple factors including institutional, socio-economic, political, physical and cultural contribute to this situation. The most dominant factor to deal with is institutional challenges which included the undue delays in the issuing of building permits, inability of the mandated institutions to effectively monitor and control on-going projects...