Faculty of Science ETDs: Recent submissions
Now showing items 61-80 of 257
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Accuracy assessment of MODIS fire products in African Savanna woodlands
(University of Zimbabwe, 2016-06)Fire poses a continuous threat to forest ecosystems and can dramatically reduce valuable timber species in forest woodland areas. The occurrence of fire in Baikiaea plurijuga woodlands warrants the need of an active and ... -
Assessment of the impacts of artisanal small scale gold mining on environmental governance within the Mazowe catchment
(2016-06)This study focused on assessing the impacts of artisanal small-scale gold activities on the environmental governance of the Mazowe catchment. A representative sample of 32 respondents was selected from three sites with the ... -
Speciation and persistence of tetracycline antibiotics in the aquatic environment: Characterization in terms of a linear rate model
(2017-08)The present work aimed at studying the degradation of tetracycline antibiotics in the aquatic environment with a view of arriving at a linear rate model taking into account microbial, photolytic and hydrolytic degradation, ... -
Adsorption of volatile n-Alkanes and polar organic solvents by water hyacinth (Eichhornia crassipes) root biomass: Thermodynamics, mechanism and effect of chemical treatment
(2017-07)The use of lignocellulosic materials as biosorbents has both environmental and economic benefits. They are biodegradable, safe to use and most importantly renewable and less costly. The objectives of this present study ... -
Diversity patterns and host shifts in ectomycorrhizal fungi across an agricultural disturbance gradient in the mid-Zambezi area, Zimbabwe
(2016-11)Fallowing creates land mosaics characterised by vegetation communities at different stages of succession. Such mosaics are expected to harbour mycorrhizal associations that reflect host species composition and diversity. ... -
Extraction and characterisation of phytochemicals from white seringa (kirkia acuminata) bark extracts
(2016-10)The intention of this study was to extract and characterise phytochemicals with analgesic effect from Kirkia Acuminata bark extracts. Soxhlet extraction and Steam distillation were used for the extraction of compounds. ... -
Adsorption of volatile n-alkanes and polar organic solvents by water hyacinth (Eichhornia crassipes) root biomass: Thermodynamics, mechanism and effect of chemical treatment
(2017-03)The use of lignocellulosic materials as biosorbents has both environmental and economic benefits. They are biodegradable, safe to use and most importantly renewable and less costly. The objectives of this present study ... -
Avocado seed starch and carboxymethyl cellulose superabsorbent polymer: Synthesis and characterisation
(2017-03)Superabsorbent polymers (SAPs) of crosslinked avocado seed starch and carboxymethyl cellulose were synthesized and their performance as fluid absorption materials was assessed by comparing them with those made from analytical ... -
In Vitro assessment of the probiotic properties of lactic acid bacteria isolated from sorghum mahewu
(2016-10)Fermentation of cereal grains is associated with beneficial microorganisms, referred to as probiotics. Probiotics are live microorganisms which confer health benefits to host organisms when consumed in adequate amounts. ... -
Application of a homogeneously sulphonated polystyrene membrane in the purification of waste water
(2016-11)The homogeneous sulphonation of waste polystyrene and its subsequent use in waste water purification was studied. The targeted waste was white food trays collected from roadsides, bins and waste dumps. They were shredded ... -
Magnetic nanopore composite beads for simultaneous removal of organic and inorganic pollutants in highly acidic water
(2016-10)A novel magnetic nanocomposite bead was synthesised for the simultaneous removal of cationic, anionic and organic pollutants removal in highly acidic water. Copper, chromium (III), phosphate and toluene were used as ... -
Distance measures in graphs
(2016-10)This thesis details the results of an investigation of bounds on four distances measures, namely, radius, diameter, the Gutman index and the edge-Wiener index, in terms of other graph parameters, namely, order, irregularity ... -
Preparation of activated carbon from tobacco stalks using microwave assisted chemical activation for water purification
(2016-11)Tobacco crop is an economically important crop. The remaining stalk after reaping the leaf however presents environmental pollution challenges. The carbonaceous nature of the stalk on the other hand makes it a promising ... -
Influence of inflammatory markers on HIV pathogenesis
(2016-10)HIV infection can now be treated effectively with combination antiretroviral medications, and mortalities due to AIDS have been greatly reduced. The increase in the number of deaths and incidences of heart and liver diseases ... -
In Vitro assessment of the probiotic properties of lactic acid bacteria isolated from sorghum mahewu
(2016-10)Fermentation of cereal grains is associated with beneficial microorganisms, referred to as probiotics. Probiotics are live microorganisms which confer health benefits to host organisms when consumed in adequate amounts. ... -
Evaluation of the role of ATP-binding cassette (ABC) transporters on chlorhexidine digluconate biocide activity in nosocomial pathogens
(2016-10)The use of biocides against bacterial infections over the years has brought numerous benefits to the health sector, but a disturbing prospect of biocide resistance to nosocomial pathogens is emergent. The evolution of ... -
The limnological status of the Gwebi river, Zimbabwe
(2016-10)The study aimed at assessing the limnological status of Gwebi River. Sampling was carried out from March to August 2015 on eight sites along Gwebi River. Five classes of land use/ land cover namely; woodland, grassland, ... -
Modelling the impact of climate variability and change on human health and diseases
(2016-11)Malaria is a life-threatening disease caused by parasites that are transmitted to humans through the bites of infected female mosquitoes. Almost half of the world’s population is at risk of malaria. Schistosomiasis is ... -
Synthesis and characterization of layered double hydroxides and their application in asprin intercalation
(2016-11)Aspirin delivery by layered double hydroxides (LDHs) was extensively studied due to the capacity of these solids to intercalate it and to control its release rate. In this work, LDH and LDH-aspirin hybrids were synthesized ... -
Assessment of levels of naturally occuring radionuclides at iron mining and processing sites in the Midlands Province of Zimbabwe.
(2016-11)Mining and mineral operations have been associated with exposures of Naturally occurring radioactive materials. A study was carried out to assess the activity concentration of naturally occurring radionuclides in iron ...
