Browsing Natural and Agricultural Sciences by Title
Now showing items 1-20 of 1340
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A 3D geological model for the East Rand Basin, South Africa
(2015)The primary aim of this dissertation is to map the geology of the East Rand Basin accurately by creating a 3D model. This was done by using borehole data from the National Groundwater Archive Geodatabase, which the Department ... -
An ab initio approach to the heliospheric modulation of galactic cosmic rays
(North-West University, 2006)In the present study we aim to further our understanding of charged particle transport in a magnetized medium. To this end, we perform direct numerical simulations of particle transport in a turbulent magnetic field. From ... -
Absorption and Quantum Chemical studies on some DYES as Corrosion Inhibitors on Mild Steel in Acidic Medium
(2014)The corrosion inhibition of some selected dyes namely Sunset yellow (SS). Amaranth (AM). Allura red (AR). Tartrazine(TZ) and Fast green (FG) on mild steel in 0.5M HCI was studied at 30-60°C using weight loss, electrochernical ... -
The abundance, identity and population dynamics of Meloidogyne spp. associated with maize in South Africa
(North-West University (South Africa), Potchefstroom Campus, 2018)Maize, a staple food in sub-Saharan countries, is also an important livestock feed source in many parts of the world. Plant-parasitic nematodes cause estimated yield losses of 12 % upwards in local maize fields. Although ... -
Acceleration of cosmic rays in the outer heliosphere
(North-West University (South Africa) , Potchefstroom Campus, 2016)Shortly before the Voyager spacecraft crossed the heliospheric termination shock, they encountered narrow, peak-like enhancements in the intensities of low-energy electrons. These enhancements were associated at the time ... -
Adaptation of trees to the urban environment : Acacia karroo in Potchefstroom, South Africa
(North-West University, 2006)Urban open spaces are of strategic importance to the quality of life of our increasingly urbanized society. Trees and related vegetation are planted and managed within the communities and cities to create or add value ... -
Addressing critical water and waste issues in Environmental Impact Assessment (EIA): the case of coal mining in South Africa
(North-West University, 2018)Internationally, the assessment of mining related impacts has been a particular focus of environmental impact assessment (EIA) research and practice, with a wealth of literature on the subject. In light of the significant ... -
Addressing social issues in rural communities by planning for lively places and green spaces
(2014)The increase in social challenges especially with regards to safety and security experienced in rural communities, as well as the lack of efficient lively places and public green spaces, is predominantly increasing in ... -
Adolescents' perceptions of physical activity for the enhancement of health: a systematic review
(North-West University, 2012)Adolescents are usually considered to be in good health, but their wellbeing tend to decrease from primary school to high school. When youth participate in at least 60 min of physical activity every day several health ... -
Die adsorpsie van atrasien deur verskillende kleiminerale en die invloed daarvan op die mobiliteit van atrasien
(Potchefstroom University for Christian Higher Education, 1993)Atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine)is a pre-emergence herbicide used mainly on maize. The influence of various clay minerals, i.e. illite-vermiculite mixtures, montmorillonite, kaolinite, ... -
Adsorption, thermodynamic and density functional theory investigation of some sulphonamides as corrosion inhibitors for some selected metals in acidic medium
(2015)In this thesis, nine sulphonamides derivatives namely, sulphanilamide (SNA), sulphamethoxazole (SMX), sulphadimethoxine (SDM), sulphisoxazole (SSZ), sulphamethazine (SMT), sulphachloropyridazine (SCP), sulphabenzamide ... -
Advanced natural language processing for improved prosody in text–to–speech synthesis
(North-West University, 2014)Text-to-speech synthesis enables the speech-impeded user of an augmentative and alternative communication system to partake in any conversation on any topic, because it can produce dynamic content. Current synthetic voices ... -
Air movement on and around tailings storage facilities on the Highveld of South Africa
(North-West University (South Africa) , Potchefstroom Campus, 2017)Dust from gold tailings storage facilities (TSFs) is problematic in certain areas of the South African Highveld. Many of these localities around TSFs are densely populated, which often result in tailings dust being a ... -
Air quality assessment of the industrialized western Bushveld Igneous Complex
(North-West University, 2011)South Africa has the largest economy in Africa, with significant mining and metallurgical activities. A large fraction of the mineral assets is concentrated in the Bushveld Igneous Complex (BIC), with the western limb ... -
Air quality in the Johannesburg–Pretoria megacity: its regional influence and identification of parameters that could mitigate pollution
(North-West University, 2012)A megacity is generally defined as a city that, together with its suburbs or recognised metropolitan area, has a total population of more than 10 million people. Air pollution in megacities is a major concern due to large ... -
Airborne radiometric surveys through the usev of a handheld spectrometer fitted to a UAV
(North-West University, 2018)Matter is made up of small particles called atoms of which some are unstable due to an imbalance between protons and neutrons. This results in the particles being radioactive, which will over time undergo radioactive decay ... -
An algorithmic interpretation of historic cosmic ray recordings
(North-West University, 2018)The aim of this study is to make additional GLE (ground level enhancement) data recordings from the 1940s and 1950s available, as well as generating of a veri ed, accurate synthetic ground truth image of historic cosmic ... -
The alignment of social and labour plan (SLP) commitments with municipal integrated development plans (IDPs)
(2014)According to s 23, 24 & 25 of the MPRDA, mining companies must submit a Social and Labour Plan (SLP) when applying for mining rights, and the local economic development (LED) of the SLP must be aligned with the local and ... -
Alkeenmetatese met behulp van 'n reniumkatalisator
(Potchefstroom University for Christian Higher Education, 1996)From literature t is well known that the 3 % Re2O7/SiO2.Al2O3-catalyst system is very effective as a metathesis catalyst system for normal alkenes. The addition of a cocatalyst to this system not only makes the system ...
