College of Basic and Applied Sciences
Permanent URI for this communityhttp://197.255.125.131:4000/handle/123456789/27639
Browse
6 results
Search Results
Item Granular Cell Tumour Of The Larynx: A Case Report(Ghana Medical Journal, 2015-12) Appiah-Thompson, P.; Baidoo, K.K.Granular cell tumours (GCTs) are benign tumours rarely found in the larynx even though they are common in the head and neck region. The laryngeal tumour may be asymptomatic but typically patients present with hoarseness of voice, stridor, haemoptysis and dysphagia. The lesion can mimic squamous cell thus deep biopsy must be taken with adjacent normal tissue to confirm this pathology. Immunohistochemical staining is also used. Complete surgical resection of this tumour is the treatment of choice. We present a 25 year old woman with a laryngeal granular cell tumour involving the right vocal cord diagnosed after direct laryngoscopy and biopsy. She was treated by right cordectomy via a laryngofissure approach. We present the case due to the rarity of the laryngeal granular cell tumour and the need to highlight the importance of taking deep biopsies. If biopsies are superficial, an inexperienced pathologist would mistake it for well differentiated carcinoma.Item Ghana(Beyond Food Production: The Role of Agriculture in Poverty Reduction, 2007) Al-Hassan, R.M.; Jatoe, J.B.D.Item Issues in mobile learning in Ghana(Innovative Techniques in Instruction Technology, E-Learning, E-Assessment, and Education, 2008) Millham, R.Ghana, a sub-Saharan country, faces a crisis in trying to keep its population in step with a technologically-changing world. With limited funding, a dispersed population, and a shortage of lecturers, the ability to manage lifelong learning, as required by a rapidly-changing technological world, for its populace is difficult. In this research-in-progress paper, we propose distance education, notably mobile learning, as a solution to the need of lifelong learning and to the constraints of the existing educational institutions. We also examine some of the issues surrounding distance education. A survey of Ghanaians as to their preferences for curriculum and training in this area is briefly presented. © Springer Science+Business Media B.V. 2008.Item Hydrogeology and groundwater resources of Ghana: A review of the hydrogeology and hydrochemistry of Ghana(Potable Water and Sanitation, 2010-01) Banoeng-Yakubo, B.; Yidana, S.M.; Ajayi, J.O.; Loh, Y.; Asiedu, D.This paper surveys the aquifers and the groundwater resources landscape in Ghana to identify the critical resource issues constraining the development and management of groundwater throughout the country. The research is based on a collation of the recent data on the hydrogeological properties of the different geological terrains in the country. This study finds that there are five main hydrogeological provinces distinguished by their well yields, lithology, and groundwater quality. This latest hydrogeological zonation, which is an improvement over previous works consists of the Birimian Province, the Crystalline Basement Granitoid Complex Province, the Voltaian Province, the Pan African Province, and Coastal Sedimentary Province. The hydrogeological properties of each province are discussed. The most prolific aquifers in the country have been identified among the fractured and weathered zones within the Togo Series, Buem Formation, Birimian and Tarkwaian System rocks. Aquifers of these rock formations also offer groundwater of the best quality for most uses in the country. Hydrochemical data gathered from wells drilled through all the hydrogeological terrains in the country for this study suggest that groundwater hydrochemistry is controlled principally by the weathering of silicate minerals and cation exchange activity. These processes are pervasive throughout the country. In isolated areas, groundwater contamination due to domestic waste discharge and agricultural activities has been noted. Four groundwater types have been identified based on Q-mode hierarchical cluster analysis and conventional graphical methods. In the coastal areas such as the Keta basin, seawater intrusion has been identified as one of the major influences on hydrochemistry of groundwater in the shallow unconfined aquifers. On the basis of the hydrochemistry, groundwater suitability for irrigation purposes is copiously discussed. The aquifer management problems can be posed as follows. There is inadequate knowledge base of the aquifer geometry and safe yield characteristics of most of the aquifers in the country. There is also inadequate information to address the status and trends in groundwater quality for most areas of the country. The following emerging issues have been identified: anthropogenic effects on groundwater quality; salt-water intrusion in coastal aquifers, groundwater depletion or inadequate supplies from groundwater to meet human needs; uncertainties about recharge and sustainability due to increased abstraction; as well as lack of institutional capacity to respond adequately to sustainable groundwater use. Recommendations to ameliorate these problems include the strengthening of institutional capacity for comprehensive national evaluation of groundwater resources, including aquifer delineation and pro-active strategies to reduce groundwater abstraction to safe yield levels and adoption of aquifer protection strategies for overall protection of groundwater quality. © 2011 by Nova Science Publishers, Inc. All rights reserved.Item Meeting socioeconomic objectives in Ghana's sardinella fishery(Natural Resources in Ghana: Management, Policy and Economics, 2010-01) Bailey, M.; Quaatey, S.; Armah, A.K.; Jacquet, J.; Khan, A.; Alder, J.; Rashid Sumaila, U.It is frequently stated that there are explicit tradeoffs between biodiversity conservation and poverty reduction. This Chapter examines these tradeoffs through the interaction between Ghana's artisanal canoe fishery and the offshore trawler fishery. Ghana's marine biodiversity is threatened by a sizeable fishing industry partly because poverty is rife, and also because the coastal population has a high dependence on fish for their food security. The artisanal fishing fleet targets small pelagics, predominantly round sardinella (Sardinella aurita), with their catch used mainly for subsistence. By-catch in the trawler fleet, which includes round sardinella, is mainly consumed in urban areas within the country, while their target species are exported. Current artisanal sardinella catch is insufficient to meet subsistence needs, and therefore domestic reliance on trawlcaught sardinella for food security might be in conflict with the conservation of biodiversity. We develop a bioeconomic model, which illustrates that giving priority to the effective management of the artisanal fishery in Ghana could provide food and job security to the fishers of Ghana, without compromising biodiversity conservation, in contrast to the commercial trawl fishery. It appears that the sardinella fishery may be overcapitalized, as optimization results suggest effort could be cut in half while still providing catch levels of about 300,000 tonnes per year, or four times current artisanal catches. Limiting by-catch and spatial conflicts by the trawl fishery could yield economic benefits from the artisanal sector of over US$200 million over 20 years. © 2010 by Nova Science Publishers, Inc. All rights reserved.Item Can ENSO help in agricultural decision-making in Ghana?(Climate Prediction and Agriculture: Advances and Challenges, 2007-01) Adiku, S.G.K.; Mawunya, F.D.; Jones, J.W.; Yangyouru, M.Rainfall variability has become a major agricultural issue in sub-Saharan Africa, especially since crop production is mainly rainfed. Irrigation technologies are expensive and their implementation is slow. Many researchers now believe that some understanding of the causes of rainfall variability would lead to measures that could be used to investigate reduction in total rainfall and/or drought effects. © 2007 Springer-Verlag Berlin Heidelberg.