Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 1087-1106 of 4818
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Determination of a safe distance for atomic hydrogen depositions in hot-wire chemical vapour deposition by means of CFD heat transfer simulations
(Tech Science Press, 2020)A heat transfer study was conducted, in the framework of Computational Fluid Dynamics (CFD), on a Hot-Wire Chemical Vapour Deposition (HWCVD) reactor chamber to determine a safe deposition distance for atomic hydrogen ... -
Determination of Corrosion Inhibition Efficiency Using HPHT Autoclave by Gingko biloba on Carbon Steels in 3.5% NaCl solution Saturated with CO2
(ESG, 2014)Leaves extract of Gingko biloba (GBE) was characterized using mass spectrometry (MS) and Fourier transform infrared spectroscopy (FTIR) methods. The influence of GBE on corrosion of carbon steels (J55,N80, P110SS and C110 ... -
Determination of factors that influence reproductive conditions in cows in the rural farms of the Ngaka Modiri Molema District of the North West Province
(Kamla-Raj, 2016)Reproductive disorders in communal farming remain answerable to economic losses and poor reproductive performance. The aim of this study was to identify factors that influence the prevalence of reproductive conditions in ... -
Determination of mineral matter and elemental composition of individual macerals in coals from Highveld mines
(SAIMM, 2016)A number of conventional and advanced analytical techniques (proximate and ultimate analysis, low-temperature oxygen-plasma ashing, X-ray diffraction, X-ray fluorescence spectrometry, coal petrography, and light-element ... -
Determination of the whole-genome consensus sequence of the prototype DS-1 rotavirus using sequence-independent genome amplification and 454® pyrosequencing
(Elsevier, 2011)The prototype DS-1 rotavirus strain, is characterised by a short electropherotype and G2P[4] serotype specificity. Following sequence-independent genome amplification and 454® pyrosequencing of genomic cDNA, differences ... -
Determining pitch-angle diffusion coefficients from test particle simulations
(IOP Publishing, 2016)The transport and acceleration of charged particles in turbulent media are topics of great interest in space physics and interstellar astrophysics. These processes are dominated by the scattering of particles off magnetic ... -
Determining the baking isotherm temperature of Söderberg electrodes and associated structural changes
(Elsevier, 2013)One of the most commonly employed electrode systems in industrial metal smelting applications is continuous self-baking electrodes, i.e. the Söderberg electrode system. In this system, the temperature at which transition ... -
Determining the most suitable method of otolith preparation for estimating the age of tigerfish, hydrocynus vittatus in the Pongolapoort Dam, South Africa
(Zoological Society of Southern Africa [SU LIS], 2013)The growth, morphology and relative age estimates of the lapillus and asteriscus otoliths were studied to gain a better understanding of the development and ageing of tigerfish otoliths. Asteriscus and lapillus growth ... -
Determining the motivating factors for the general use of social media amongst tourists to South Africa
(The Social Sciences Research Society, 2016)The remarkable growth in information technology has led businesses to appreciate the power and potential of online marketing, rather than merely focussing their promotional activities and goals on production and sales. ... -
Determining the potential sites of neural adaptation to cross-education: implications for the cross-education of muscle strength
(Springer, 2018)Cross-education describes the strength gain in the opposite, untrained limb following a unilateral strength training program. Since its discovery in 1894, several studies now confirm the existence of cross-education in ... -
Determining the waist circumference cut off which best predicts the metabolic syndrome components in urban Africans: the SABPA study
(Thieme Publishing, 2011)Various studies have shown that the relationship between waist circumference (WC) and abdominal obesity is age, gender as well as ethnicity-dependent. WC criteria for Sub Saharan Africans have not been defined by the ... -
Determining the waist circumference cut off which best predicts the metabolic syndrome components in urban Africans: the SABPA study
(Thieme Publications, 2011)Various studies have shown that the relationship between waist circumference (WC) and abdominal obesity is age, gender as well as ethnicity-dependent. WC criteria for Sub Saharan Africans have not been defined by the ... -
Developing a Basic Mathematics Questionnaire for Grades 4 to 7
(Elliot & Fitzpatrick, 2009) -
Developing a competency scale for sport coaches
(AFAHPER-SD, 2013)The importance of operational competencies of sport coaches is widely acknowledged in the literature, yet there appears to be a lack of research in this field. The purpose of this research study was to develop a competency ... -
Developing a competency scale for sport coaches
(LAM Publications; AJOL; Sabinet, 2013)The importance of operational competencies of sport coaches is widely acknowledged in the literature, yet there appears to be a lack of research in this field. The purpose of this research study was to develop a competency ... -
Developing a contamination susceptibility index for the Goreangab Dam in Namibia
(Elsevier, 2020)The convenience and quality of life provided by dams is highly dependent on the quality of the retained water. Human intervention plays an important role in defining the quality of the retained water as expanding human ... -
Developing a graphical tool for students to understand air resistance and free fall: when heavier objects do fall faster
(IOP Publishing, 2017)Abstract Many students find it difficult to apply certain physics concepts to their daily lives. This is especially true when they perceive a principle taught in physics class as being in conflict with their experience. ... -
Developing a neighbourhood sustainability assessment model: an approach to sustainable urban development
(Elsevier, 2019)In every neighbourhood urban development; attention is directed towards overcoming the spatial disparities, rapid urbanisation, socio-economic imbalances and transport system connectivity challenges that influence the urban ... -
Developing a site selection tool to assist reintroduction efforts for the Southern Ground– Hornbill Bucorvus leadbeateri
(Taylor & Francis. Co-published by NISC., 2013)The Southern Ground-Hornbill BucolVus leadbeateri (SGH) is regarded as Vulnerable globally and Endangered in South Africa as a result of losing close to 70% of its range and 50% of its historic population in the country. One ...