Environmental & Physical Sciences

Environmental & Physical Sciences Research Papers/Topics

EFFECTS OF EXTRACTS AND HYDRODISTILLATES OF Clausena Anisata (Wild.) Ex. Benth. AND Hyptis Spicigera Lam. ON Musca Domestica L. AND Periplaneta Americana (L

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...

DESIGN AND DOSIMETRY CONSIDERATION FOR THE FABRICATION OF MANUAL MULTILEAF COLLIMATOR FOR A CIRUS COBALT-60 TELETHERAPY MACHINE.

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 ...

Relative Abundance Of Mirids Of Cocoa In Differently Managed Systems In The Eastern Region Of Ghana

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...

Exploration Of Natual Enemies Of The Oil Palm Leafminer Coelaenomenodera Lam Eensis Berti And Mariau (Coleoptera: Chrysomelidae) In Oil Palm Plantations

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...

Determination Of Level Of Radio Frequency Field Exposure To Military Personnel From Tactical Field Expedient Antenna

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...

Hydrogeochemical Analysis Of Groundwater In The Sawla-Tuna-Kalba District Of The Northern Region Of Ghana

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...

Assessing Willingness To Reuse Treated Wastewater For Crops Irrigation, And The Consumption Of Crops Irrigated With Treated Wastewater: A Case Study Of Students From University Of Ghana And A

ABSTRACT All life forms including human need water resources in order to live healthy, promote sustainable development and ensure their well- being. The study assessed public willingness to accept and reuse treated wastewater as an alternative water resource to support the dwindling existing water resources for irrigation and the consumption wastewater irrigated crops. A social survey based on random sampling of 232 respondents in Ashaiman, capital of Ashaiman Municipality which has a well di...

Impacts Of Land Use/Cover Change On Water Quality In Lake Bosomtwi Basin Of Ghana..

ABSTRACT Land use/cover alteration within lake basins is occurring at accelerated rate most importantly in developing countries like Ghana. Anthropogenic activities (livelihood change, population growth, agricultural intensification and practices) and natural factors like seasonal variations are in most situations the major cause. To examine the effects of land use/cover on the physico-chemical and biological properties of Lake Bosomtwi, satellite images of the Lake’s watershed covering the...

Using Hydrochemical And Isotopic Tracers To Assess The Impact Of Anthropogenic Activities On Groundwater Quality In Bongo And Kassena Nankana West Districts In Upper East Region Of Ghana

ABSTRACT The population within Bongo and Kassena Nankana West Districts, in the Upper East Region of Ghana is estimated to be about 84,545 and 70,667, respectively. An estimate of about 80% of the population depends on groundwater for domestic and agricultural purposes. However, groundwater resources in the Districts is at risk due to anthropogenic activities such as rapid increase in irrigation activities and animals rearing, open defecation and uncontrolled disposal of animal droppings, imp...

Radiotracer Investigation Of An Aerobic Tank Of A Wastewater Treatment Plant

ABSTRACT Water is used in almost all human activities and large amounts of wastewater are produced every time. Wastewater need to be treated before it is discharged into the environment because it contains possible harmful substances which can pollute the environment and threaten life. Waste water treatment methods vary from industry to industry according to the process utilized. In most cases, the contaminants are not fully removed from waste water before discharge, due to certain malfunctio...

Assesment Of The Shielding Integrity Of Co – 60 Gamma- Ray Scanner At Aflao Border, Ghana.

ABSTRACT This study examines the current state of the shielding integrity of the 38.7 TBq Co-60 gamma ray scanner with an average energy of 1.25 MeV operated by NICK TC Scan Limited, which has been in use for destination inspection at Aflao Border of Ghana, for the past six years, (2010-2016). The facility uses a high energy ionizing radiation in its operation; therefore continuous adequacy of the installed biological shielding is critical to the protection and safety of the workers and the g...

Occurence of Antibiotic Resistant Bacteria in The Legon Sewage Treatment Plant And The Receiving Onyasia Stream; Implications For Wastewater Reuse

ABSTRACT  Although wastewater treatment plants efficiently reduce the loads of pathogens in wastewater, the conventional treatment processes do not show significant removal of antibiotics, antibiotic resistant bacteria and antibiotic resistant genes, resulting in the introduction of these contaminants into the environment. This has human health implications for wastewater reuse and the use of effluent receiving water bodies as irrigation sources. Humans may be exposed to resistant bacteria a...

Causes And Consequences Of Informal Settlement Planning In Ghana: A Case Study Of Aboabo, A Suburb Of Kumasi Metropolis

ABSTRACT Inadequate attention to urban land-use planning and practices could result in the proliferation of unauthorised structures which could destroy the health, beauty and convenience of cities. This thesis sought to investigate the causes and consequences of unauthorised structures at Aboabo, a suburb of Kumasi Metropolis. A total of 244 respondents comprising 119 house-owners, 119 household heads, and 6 key informants (the chief of Aboabo and five heads of Land Planning and Management In...

Laboratory Rearing Of The Cocoa Aphid Toxoptera Aurantii (Boy) And Screening Cocoa Genotypes For Their Resistance To The Aphid

ABSTRACT A study was conducted to develop a quick and efficient laboratory mass-rearing method for the cocoa aphid Toxoptera aurantii (Boy) and to screen cocoa genotypes for their resistance to the aphid. In a similar experiment, two cocoa genotypes were screened to determine their level of attractiveness to the cocoa capsid Sahlbergella singularis Hagl and the results compared with those from the aphid study. The study formed part of an on-going programme being conducted by the Cocoa Researc...

Simulating Spatial Growth Patterns Of Urban Areas In Ghana: An Agent Based Modeling Approach

ABSTRACT In Sub-Saharan Africa, rapid urban growth has outstripped the capacities of central and local government to control and regulate urban land development; hence people construct their homes on available lands most of which are liable to floods. This research set out to identify the driving forces of spatial growth and to simulate spatial growth patterns of structures in the Shama district of the Western Region of Ghana using an agent-based modeling approach. The study was conducted wit...


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