ABSTRACT The Boltzmann kinetic equation was used to investigate and derived theoretically the current density characteristics of carbon nanotubes exposed simultaneously to both constant (dc) and high-frequency (ac) electromagnetic fields. Generation and amplification of terahertz radiation at room temperature was predicted. We demonstrated that this can suppress electric current instabilities while still preserving a broadband THz gain. We have further shown that THz gain in the conditions o...
Abstract Context: This study investigated the presence or absence of β-catenin and Patched1 (PTCH1) genes involved in the developmental pathway in ameloblastoma, in order to clarify the genetic etiology of this tumor. Aim: The aim of this study was to investigate whether PTCH1 and β-catenin genes are involved in the development of ameloblastoma. Subjects and Methods: Archived formalin-fixed paraffinembedded specimens of 89 ameloblastoma cases from the year 2000 to 2010 were genotyped by pol...
ABSTRACT The discovery of bioactive natural products is a basis for development of novel pharmaceuticals. Indigenous medicinal plants which are largely unexplored offer chemical diversity with structural complexity and biological potency. Despite their ethnomedicinal usage, there is little information on the bioactive components of Dioclea reflexa and Cussonia arborea. This study was designed to isolate and characterise the secondary metabolites from the roots of D. reflexa and C. arborea, an...
ABSTRACT Quality assurance (QA) in all aspects of radiotherapy reduces the number of instances of accidental dose misadministration. Reduction of such errors and uncertainties plays an important role in the outcome of radiotherapy. As part of the audit supported by the IAEA in Ghana this study was designed to review the whole chain of activities in 3D conformal radiotherapy (3D-CRT) workflow, from patient data acquisition to treatment planning and dose delivery.The study focused on dosimetry...
ABSTRACT A Large system is difficult to study globally. Its study requires some random procedure that can expose some of its properties to enable the identification of its typical behaviour. To this end, uniformly random regular graphs were generated due to their fascinating properties and applications. The Potts model was used to assign spin values to the vertices of the graph from a finite spin space. Errors do occur in large system rarely but when they do, their impact may cause some dest...
ABSTRACT The pathogenesis of severe complications of Plasmodium falciparum malaria is still poorly understood in spite of its potentially fatal consequences. This poses practical challenges for malaria control efforts, especially, in discriminating children who are really at risk of severe malaria from those with incidental malaria in moderate and high malaria transmission areas. The search for reliable diagnostic and prognostic biomarkers for severe malaria is yet to produce encouraging resu...
ABSTRACT THERMOBACTERIOLOGY OF SOME GHANAIAN CANNED FOODS F. ATO-AUSTIN Dept, of Nutrition and Food Science, University of Ghana, SUPERVISING COMMITTEE 1976. Dr. M„L. Woolfe Dr. R.J. Priest!^ Dr. So Grondin. The m i c r o b io lo g i c a l content and the therma l p r o c e s s e s in use fo r s ix l o c a l l y canned vegetables , Bambara Beans in sauce , Garden egg s in B r in e , Okro in b r in e , Whole Tomato in tomato juice and Pepper puree were studied to establish causes of spoi...
ABSTRACT The objective of this research is to ascertain if it is feasible to replicate tomotherapy treatment with telecobalt machine based on phantom studies. To replicate gantry motion around a patient during tomotherapy treatment, the phantom was placed on a fabricated turn-table capable of translational and rotational motions while the gantry of the telecobalt machine was kept constant. The treatment simulations were performed with Cirus cobalt 60 teletherapy machine at the Komfo Anokye T...
ABSTRACT Nsiho kenkey is a bland tasting stiff porridge produced from dehulled maize grains and consumed mainly in some parts of Southern and Eastern Regions of Ghana. This study was carried out to identify the microorganisms responsible for nsiho fermentation and to develop a starter culture for its controlled fermentation in order to improve the safety and quality of the product. A brief field study was carried out in two districts in the Eastern Region of Ghana to observe the processing o...
ABSTRACT As a developing countJy, Ghana is faced with the problem of management of her solid waste. Disposal ofsolid waste in open dumps and swampy areas in a bid to reclaim the land is the most common method used. This research was carried out at the Cape Coast Municipality to investigate the effect of disposed solid waste on the environment. The methodologies are purposive sampling for the solid waste evaluation, titrimetric and spectrophotometric for the analysis of the leachate from the ...
ABSTRACT The effect of composting substrates prepared from four agricultural wastes: corn cob, oil palm fruit fibre, rice husk and sawdust on growth, yield and nutrient content of oyster mushroom, Pleurotus ostreatus, (Jacq. ex Fr.) Kumer was investigated. One set of the substrates was decomposed and the other set was not. The mother spawn, obtained from oyster mushroom fruit body tissues and spores from two sources and a spawn from a third source, cultured on Potato Dextrose Agar medium grew...
ABSTRACT The objective of this study is to present empirical evidence obtained through household survey in order to understand which factors are associated with children who obtain a birth certificate, and thus realize their right to a name and legal identity. Discriminate analysis was used to determine the factors that explain the differences between households who register their children and those who do not. 13 independent variables were analyzed against two levels of the dependent variabl...
ABSTRACT Technology is now a compelling tool in teaching and learning, offering constructivism to education. Its use across all disciplines and Science education cannot be excluded. In view of this, using a descriptive research design, this study investigated Preservice teachers use of technology and constructivist events in colleges of education in the central region, Ghana. Data were collected through the use of questionnaire from a sample of 60 preservice teachers who were on their out pro...
ABSTRACT A three-dimensional (3D) laser imaging system based on digital holography has been used as a tool for testing digital holography (DH) in the infrared (IR) range in several configurations; transmission and reflection mode. The feasibility of digital holography in the infrared region was demonstrated using two beam interferometric technique for recording holograms both in reflection and transmission type geometry which employs a pyroelectric sensor array detector. The materials used ...
ABSTRACT Mitochondria are organelles present in the eukaryotic cell that produce about 90% of the energy required by the cell through oxidative phosphorylation. They also play vital roles in other metabolic processes in the cell. They have unique features that make them sensitive to a number of xenobiotics. Thus, they serve as primary or secondary targets for these xenobiotics. Medicinal plants contain a range of phytochemicals which also have the potential to interfere with mitochondrial fun...