ABSTRACT An x-ray dose above the maximum permissible limit is harmful to human beings. A study of x-ray attenuation by materials is an important subject in protecting humans from harmful effects of radiation. Thus it is desirable to have knowledge about materials for effective x-ray shielding. Concrete is the most widely used construction material for this purpose and its composition plays an essential role in modifying the mechanical properties which affects significantly the shielding prope...
ABSTRACT In this study, the Monte Carlo N-particle simulation code MCNPX-2.6.0 was used to determine the shielding effectiveness of clay, wood and sandstone. This was done by determining the transmission of 60Co gamma and X-rays with energies 60 keV, 120 keV and 300 keV through wood, clay and sandstone. The transport computations were done for slab shield, computing half-value layers (HVLs), tenth-value layers (TVLs), buildup factors, and attenuation coefficients (both linear and mass attenua...
ABSTRACT Access to kindergarten education has increased in Ghana currently, however, due to poor monitoring and evaluation systems, standards are often compromised. This study sought to assess quality kindergarten education using one hundred and two (102) public (52) and private (63) kindergartens in the Tamale Metropolis, of Ghana. A crosssectional design with mixed method approach was used to sample one hundred and twenty (120) teachers and ten (10) head teachers from the sampled schools. T...
ABSTRACT Groundwater samples collected from 40 institutions and public boreholes within the Twifo Hemang Lower Denkyira (T), Assin North (AN) and Assin South (AS) districts of the Central Region of Ghana were assessed to determine their suitability for domestic and agricultural purposes, based primarily on recommended permissible limits for parameters stated by World Health Organisation. The area covers an area of about 4,199 km2 . The quality assessment was made through the estimation of Ca2...
Abstract Resistance to the cowpea aphid is important component of integrated pest management of cowpea cropping systems most especially at the vegetative stage. The objective of this study was to demonstrate the effectiveness of the aphid resistance locus identified in advanced breeding line SARC 1-57-2 in reducing damage from the cowpea aphid in Ghana. Using an F2 population developed from Apagbaala x SARC 1-57-2, the resistance locus was tagged with the SSR marker CP 171F/172R with a recom...
The study was conducted to determine the relationship between climatic variation and agricultural production as well as to identify their impact in Makurdi Local Government Area. The research went further to determine effective weather for livestock production in Fiidi, Wailomayo, Wadata, agan, Bar, Mbalagh, market Clark, modern market, NorthBank 1, Northbank II and Mission Wards which constitute the study area. The result shows that there is marked inter annual variations in the rainfal...
ABSTRACT Highly concentrated urban areas have experienced many floods over the last decades. There has been significant increase in the trend of extreme rainfall events, in the face of a lack of effective flood management systems. Though rainfall in Ghana has been decreasing since the 1970’s, and the government has initiated many disaster reduction interventions, incidences of flooding have ironically continued to increase. The study explores the post-flood disaster response mechanisms, ef...
ABSTRACT Cocoa is one of the most important cash crops in West Africa especially Ghana. It contributes 23% of the foreign export earnings from the agricultural sector in Ghana. Cocoa beans are fermented and dried before exporting. The fermentation period in Ghana is 6 to 7 days but some cocoa farmers under-ferment their cocoa beans leading to the development of purple cocoa beans. This study was carried out at CRIG and African Regional Postgraduate Programme in Insect Science (ARPPIS) at the ...
ABSTRACT The hydrogeochemical data of groundwater of southwestern coastal Districts of the Central Region of Ghana were examined to determine the main factors controlling the groundwater chemistry and study the resultant water type formed in order to determine the suitability of the water for different uses. Different geochemical interpretation methods were used to identify the geochemical characteristics. The pH values of groundwater samples showed that 36 samples had pH values below lower...
ABSTRACT Extracts of two indigenous Ghanaian medicinal plants Clausena anisata and Hyptis spicigera were bioassayed against housefly (Musca domestica L.) and cockroach (Periplaneta americana (L)) for various insect control activity. The extractives bioassayed were the petroleum ether and methanol extracts and essential oil of the plants. The lethal toxicity of the plant extractives were bioassayed using topical application and petri dish residual method against adult flies and cockroach nymph...
ABSTRACT A manual eight multi-leaf collimator (MLC) has been designed and fabricated for the Cirus cobalt-60 machine at the Komfo Anokye Teaching Hospital. The fabricated MLC is made up of a high carbon steel leaves. The leaf in each bank has a standard width of 7.5 cm projected at the isocentre at a thickness of 4.6 cm. The leaf transmission factor was determined to be 4.8%, which is within the acceptable standard of below 5%. The cobalt-60 beam characteristics such as beam profiles, output ...
ABSTRACT The temporal distribution of four important cocoa mirid species (Distantiella theobroma Dist, Sahlbergella singularis Hagl, Helopeltis bergothii and Bryocoropsis laticollis) was studied in three differently managed cocoa farming systems from May 2013 to April 2014. In addition, the incidence of Bathycoelia thalassina, Characoma stictigrapta, Anomis leona, Earias biplaga, Eulophonotus myrmeleon, Oecophylla longinoda and Crematogaster africana, were recorded. The three systems were: Or...
ABSTRACT Surveys were conducted to identify the natural enemies of the oil palm leafminer, Coelaenomenodera lameensis Berti and Mariau (Coleoptera: Chrysomelidae). Different developmental stages were recovered from infested leaflets and reared for the emergence of parasitoids. Four parasitoids all belonging to the order Hymenoptera and family Eulophidae were identified. They were Neochrysocharis species, Chrysocharis species, Pleurotroppopsis species and Apleurotropis species. Parasitism on C...
ABSTRACT Radio communication is an integral part of any military operation. This helps commanders at all levels to achieve command and control in their operational environment. The employment of these radios with their corresponding antennas has led to an increase in the concern of the potential health risks that may arise as a result of exposure to radio frequency (RF) radiations. The main objective of this research was to determine the levels of radio frequency field exposure to military pe...
ABSTRACT The climate of the Sawla Tuna Kalba District is the tropical continental type where only one rainy season in a year, occurs between early May and late October this makes surface water resources insufficient in the area. Groundwater is the main water supply in this region the utilization of groundwater for various purposes is common. In this part of northern Ghana, groundwater serves as a major source of freshwater for domestic and agricultural purposes. This study investigated the qu...