Browsing Faculty of Science e-Theses Collection by Title
Now showing items 102-121 of 257
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Habitat fragmentation, tree species diversity and land cover dynamics in a resettlement area in Chimanimani district of Zimbabwe : a spatio-temporal approach
(2014-10-07)Agricultural expansion into forests leads to habitat fragmentation and the creation of habitat patches that can only support a limited amount of biodiversity. Adopting theoretical frameworks which seek to understand ... -
Heavy metal air pollution study, using a Moss Bio Monitoring technique
(2017-11-16)Air pollution is increasingly becoming a problem in developed and developing countries. As a corrective measure, constant air monitoring has been done using conventional techniques which are costly and time consuming hence ... -
Host Discrimination by the Green Peach Aphid (Myzus persicae Sulzer) Complex and Relative Importance of Non-Colonizing Aphid Species in the Transmission of Bushy-top and PVY in Tobacco
(2013-06-04)This study focused on host preference by the tobacco-adapted form of Myzus persicae, suitability of different host plants to settling and reproduction of the aphid (M. persicae) and on monitoring aphid flight patterns using ... -
HPLC determination of atrazine in water and sediment samples after liquid-liquid and solid phase extraction: A comparative study.
(2016)Atrazine is a selective herbicide for control of broadleaf and grassy weeds in corn, sorghum and sugarcane. The extraction efficiency was studied using distilled water, river water and sediment samples. A two-step procedure ... -
A Human Health Risk Assessment of Heavy Metal Bioaccumulation in Nile Tilapia Oreochromis niloticus from Lake Chivero, Zimbabwe
(2013-06-04)Lake Chivero’s catchment covers the urban areas of Harare and Chitungwiza, which contribute immensely to the pollution of the lake through urban runoff, sediments, sewage effluents, industrial effluents and leachate from ... -
Identification and differentiation of Fusarium species using selected molecular methods
(2012-08-28)The taxonomy of Fusarium at the species level is based on morphological characteristics which include hyphae, conidia and microconidia. These features require expertise in taxonomy for an accurate and reliable diagnosis ... -
Immuno-epidemiology of helicobacter pylori-associated autoimmune conditions in Zimbabwean patients.
(University of Zimbabwe, 2019-10)The bacterium Helicobacter pylori (H. pylori) colonizes the human gastric mucosa and is a recognized causative agent for peptic ulcer disease. The prevalence of H. pylori infection in Zimbabwe is unknown. Treatment requires ... -
Impact of agricultural intensification on biodiversity and secondary succession in the Mid-Zambezi Valley, Northern Zimbabwe
(2013-06-04)In this thesis, the impact of woodland clearing, cultivation intensity and fallowing on tree species diversity, physiognomy and dominance was tested in the semi-arid mid-Zambezi valley, northern Zimbabwe. This study ... -
Impact of climate change and biotic factors on avifauna diversity and spatial distribution in the mid-Zambezi Valley, Zimbabwe.
(University of Zimbabwe, 2021-06)Construction of Lake Kariba on the Zambezi River restructured the biodiversity of the Zambezi Valley. However, studies on how the avian community of Kariba has changed since construction of the lake are scant. This study ... -
The Impact Of Communal Land Use On Dambos In Lower Gweru, Zimbabwe
(2012-08-29)The study investigated how the exploitation of dambos changes their vegetation composition, soil properties and how that will in-turn affect the water quality. Species diversity and evenness ware higher in Madikane (H’ = ... -
Impact of cultivation on soil and species composition of the Monavale Vlei, Harare
(2012-08-29)The study assessed the impact of cultivation on soil properties, species richness (grass and herbaceous) and species composition on the Monavale vlei. The results revealed that cultivation had an impact on nitrogen levels, ... -
Impact of elephants (LOXONDONTA AFRICANA L.) on baobab trees (ADANSONIA DIGITATA L.) in Man Pools National Park Zambezi Valley Region
(2013)An assessment was made on elephant impact on a baobab population in Mana Pools National Park. Study sites were selected on the basis of their distance from the Zambezi River, a major source of perennial water in the park. ... -
Impact of Lantana Camara invasion on a cattle/wildlife ranch: A case of Imire Ranch, Wedza District, Zimbabwe
(2016-04)The impact of Lantana camara invasion in a mixed game/cattle ranch was assessed at Imire Ranch using remote sensing and ground truthing techniques. Vegetation communities of the ranch were classified and mapped as a way ... -
The Impact of Sewage Effluent and Natural Self-purification in the Upper Chinyika River Below Hatcliffe Sewage Works, Harare.
(2012-08-28)The impact of sewage effluent and natural self-purification in the upper Chinyika River was investigated during the period October 2004 to February 2005. The physico-chemical and river flow variables, and water samples, ... -
Impact of the invasive alien species, LANTANA CAMARA (L). on native vegetation in Northern Gonarezhou National Park, Zimbabwe
(2012-08-29)This study assessed the impact of Lantana camara invasion on native vegetation in Northern Gonarezhou National Park (GNP), Zimbabwe. Stratified random sampling was used with three categories; uninvaded, moderately invaded ... -
Impacts of hippodamia variegata (col.: coccinellidae) predation and aphidius colemani (hym.: braconidae) parasitism on myzus persicae nicotianae (hem.: aphididae)
(2016-04)The tobacco aphid (Myzus persicae nicotianae) is a cosmopolitan pest and one of the major pests of tobacco. Due to its damaging potential, particularly as a vector of virus diseases, management of M. persicae nicotianae ... -
In vitro antibacterial activity of selected plant extracts from Zimbabwe
(2016-04)Bacterial infections, if not properly treated, have the potential to become life-threatening in humans. The discovery of antibiotics in the 1940s made it possible for bacterial infections to be easily managed, thus, ... -
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. ... -
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. ... -
In Vitro interactionsof plant phenolic compounds and antiparasitic drugs with drug metabolising enzymes and transporters
(2012-07-11)Drug metabolising enzymes and transporters play a critical role in the pharmacokinetics and hence, absorption, distribution, metabolism, and excretion (ADME) of compounds and medicines. The objective of this thesis was to ...
