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Browsing Natural and Agricultural Sciences by Type "Dissertation"
Now showing items 1-20 of 2965
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(University of Pretoria, 2011-10-31)Fusarium verticillioides (= Fusarium moniliforme) a common fungal contaminant of maize throughout the world has been associated with diseases in both man and animals. The structure of the fumonisins, a family of structurally ...
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(University of Pretoria, 2018)The aim of this study was to create a genomic resource for a typical plant genome from Illumina short reads, using Psidium guajava as a case study. Here we present a bioinformatics approach to produce a de novo plant genome ...
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(University of Pretoria, 2018)This dissertation examines the market efficiency and arbitrage opportunities between 04 January 2000 and 31 December 2015 on selected JSE-listed stocks and equity indices. To assess market efficiency, four tests were ...
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(University of Pretoria, 2018)Gastrointestinal parasitism is a major problem to livestock productivity worldwide and small ruminant production is affected the most. Resistance of gastrointestinal nematodes (GIN) to anthelmintics is a widespread ...
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(University of Pretoria, 2018)This study investigated the effects of organic and inorganic Zinc (Zn) supplementation on heat stressed, male Ross broilers. Birds were randomly assigned to 12 treatment groups, consisting of 8 replications each. Each ...
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(University of Pretoria, 2017)This study was conducted to investigate three different litter materials, namely pine shavings (PS), bio-secure, fumigated pine shavings (BS) and sunflower hulls (SH) on their physical characteristics and how this influenced ...
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(University of Pretoria, 2018)The purpose of this study was to identify genomic regions associated with carcass traits using real-time ultrasound measurements in South African Nguni cattle. The dataset contained measurements from 200 Nguni steers ...
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(University of Pretoria, 2013)An assessment of the natural resources on Chapungu Ranch, Zimbabwe, was undertaken for the purpose of incorporating this ranch into the larger Sango Ranch. The geological description was based on literature, whilst the ...
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(University of Pretoria, 2018)Calcium and phosphorus are vitally important macro minerals and are the most abundant minerals found in the broiler, playing a vital role in bone development and mineralisation. Phosphorus also plays an important role in ...
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(University of Pretoria, 2017)Increased anthropogenic activities such as urbanisation and the bushmeat trade increase the degree of contact humans have with non-human primates. Zoonotic pathogens have increased the risk of disease emergence significantly. ...
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(University of Pretoria, 2017)In this study the nite mixture of multivariate Gaussian distributions is discussed in detail including the derivation of maximum likelihood estimators, a discussion on identi ability of mixture components as well as a ...
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(University of Pretoria, 2019)This study investigates the cryptocurrency called bitcoin. A cryptocurrency is a type of currency that depends on cryptography to issue new units instead of depending on government decree like fiat currencies. The study ...
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(University of Pretoria, 2019)Tropical weather systems are known to cause havoc due to heavy rain which leads to flooding. Continental Tropical Low pressures (CTLs) are one of such systems. Very little research has been dedicated to tropical weather ...
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(University of Pretoria, 2018)Fluorochemicals are valuable organic compounds manufactured by PELCHEM, the chemical manufacturing company of NECSA (The South African Nuclear Energy Corporation of South Africa). Fluorochemicals are manufactured through ...
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A three-dimensional model for the Leeuwpoort tin mine and its application to exploration prediction (University of Pretoria, 2017)Due to tighter financial margins, the need for better knowledge of grade data is required. Geological models allow the user to have a better understanding of the geological environment in which mining is taking place. Three ...
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(University of Pretoria, 2016)Recent advances in computational technology and algorithms have made it feasible to accurately model the electronic structures of solids by means of density functional theory. The development of hybrid functionals have ...
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(University of Pretoria, 2021-12-08)Alien invasions are a global concern, with impacts on native biodiversity. Invasive species may be introduced to new regions for many reasons, with ornamental horticulture being one of the major pathways for the entry of ...
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(University of Pretoria, 2011-02-09)Killer whales are the oceans’ apex predator and are known to have important effects on ecosystems. At Subantarctic Marion Island, southern Indian Ocean, they have only been studied opportunistically, resulting in limited ...
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(University of Pretoria, 2016)The event of a default for low-default portfolios, such as sovereign debt or banks, have received much attention as a result of the increasing instabilities in financial markets. The lack of sufficient default information ...
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The acceptability and use of convenience foods by black women employed by government in Mpumalanga (University of Pretoria, 2008)The recent increase in the number of black working women has meant that time has become an even more precious commodity in the majority of households with working women than before. Growth in women’s participation in the ...
Now showing items 1-20 of 2965