Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 500-519 of 4825
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Calibration and validation of optical chlorophyll-measuring devices for use in predicting crude protein concentration in tropical grass herbage
(Wiley, 2016)The objective of this experiment was to evaluate the Fieldscout CM 1000 NDVI and Yara N-Tester as easy-to-use and cost-effective tools for predicting foliar chlorophylls (a, b and total) and crude protein (CP) concentrations ... -
A calibration neutron monitor: energy response and instrumental temperature sensitivity
(American Geophysical Union, 2008)Neutron monitors are integral detectors of secondary cosmic rays. Since each of them has its own detection efficiency, energy spectra cannot readily be derived from their observations. To circumvent this problem, latitudinal ... -
A calibration neutron monitor: statistical accuracy and environmental sensitivity
(Elsevier, 2010)This paper is a follow-on of that of Krüger et al. [Krüger, H., Moraal, H., Bieber, J.W., Clem, J.M., Evenson, P.A., Pyle, K.R., Duldig, M.L., Humble, J.E. A calibration neutron monitor: energy response and instrumental ... -
Calibration of statistical methods used to constrain pulsar geometries via multiband light curve modelling
(SAIP, 2016)Since its launch in 2008, the Fermi Large Area Telescope (LAT) has detected over 200 γ-ray pulsars above 100 MeV. This population of pulsars is characterised by a rich diversity of light curve morphologies. Researchers ... -
A call for global action for rare diseases in Africa
(Springer Nature, 2020)The 11th International Conference on Rare Diseases and Orphan Drugs (ICORD), South Africa, included the Africa-Rare initiative launch and facilitated multi-stakeholder engagement in the challenges facing, and opportunities ... -
Calorimetric neutrino expectations from bright blazar flares
(Sissa Medialab, 2019)Blazar jets are extreme environments, in which relativistic proton interactions with an ultraviolet photon field could give rise to photopion production. High-confidence associations of individual high-energy neutrinos ... -
Calvyn en die natuurwetenskappe
(The Association for Christian Higher Education / Die Vereniging vir Christelike Hoër Onderwys, 2010) -
Can a metabolomics-based approach be used as alternative to analyse fatty acid methyl esters from soil microbial communities?
(Elsevier, 2016)Modern high-throughput approaches such as metabolomics, holds promise for investigating microbial communities. This study evaluated the quantitative and qualitative data generation potential of a metabolomics-based approach ... -
Can metabolomics improve tuberculosis diagnostics?
(Springer, 2014)With one third of the global human population suffering from tuberculosis (TB) in 2001, the disease was officially declared a worldwide emergency by the World Health Organization. Since then this disease has grown ... -
Can perceptual differences account for enigmatic information security behaviour in an organisation?
(Elsevier, 2016)Information security in organisations is often threatened by risky behaviour of users. Despite information security awareness and training programmes, the human aspect of information security remains a critical and ... -
Can the presence of curved forms of the diatom Aulacoseira ambigua in the Nile (Egypt) and Vaal (South Africa) Rivers be ascribed to similar water quality conditions?
(Taylor & Francis, 2018)Spiral colonies of the diatom Aulacoseira ambigua were assigned the rank of forma ( Aulacoseira ambigua f. japonica ). This spiral-shaped, colonial, centric diatom has limited geographical distribution ... -
Candidate gene analysis of the fibrinogen phenotype reveals the importance of polygenic co-regulation
(Elsevier, 2017)Fibrinogen and its functional aspects have been linked to cardiovascular disease. There is vast discrepancy between the heritability of fibrinogen concentrations observed in twin studies and the heritability uncovered by ... -
Cannabidiol rather than Cannabis sativa extracts inhibit cell growth and induce apoptosis in cervical cancer cells
(BioMed Central, 2016)BACKGROUND: Cervical cancer remains a global health related issue among females of Sub-Saharan Africa, with over half a million new cases reported each year. Different therapeutic regimens have been suggested in various ... -
Canonical form for H-symplectic matrices
(Springer, 2018)In this paper we consider pairs of matrices (A,H), with A and H either both real or both complex, H is invertible and skew-symmetric and A is H -symplectic, that is, ATH A = H. A canonical form for such pairs is derived ... -
A canonical form for H-unitary matrices
(Ele-Math, 2016)In this paper matrices A are considered that have the property that A∗HA = H ,where H = H∗ is invertible. A canonical form is given for the pair of matrices (A,H) under transformations (A,H) → ( S−1AS,S∗HS), ... -
The capacity of personnel in disaster risk management in South African municipalities
(AOSIS, 2017)Since 1994, fundamental transformation in South Africa in terms of disaster risk reduction taken place. The transformation process led to the promulgation of the Disaster Management Act (57/2002) (DMA) that introduced a ... -
Capsaicin and piperine as functional excipients for improved drug delivery across nasal epithelial models
(Thieme, 2019)The fruit from various pepper plants has been employed for the seasoning of food, as perfuming agents, and also as traditional medicines. Phytochemicals isolated from different pepper species have been found to modulate ... -
Carbon balance of a grazed savanna grassland ecosystem in South Africa
(EGU, 2017)Tropical savannas and grasslands are estimated to contribute significantly to the total primary production of all terrestrial vegetation. Large parts of African savannas and grasslands are used for agriculture and cattle ... -
The carbon dioxide gasification characteristics of biomass char samples and their effect on coal gasification reactivity during co-gasification
(Elsevier, 2018)The carbon dioxide gasification characteristics of three biomass char samples and bituminous coal char were investigated in a thermogravimetric analyser in the temperature range of 850–950 °C. Char SB exhibited higher ... -
Carbon dioxide pollution reduction through load shift projects
(IEEE, 2014)Significant advances have been made in automation technology allowing systems to shift electricity consumption from peak periods to off-peak periods. Load shift projects have been implemented throughout South Africa for ...