Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 865-884 of 4818
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Continuous adaptation through genetic communication: a putative role for cell-free DNA
(Taylor & Francis, 2012)Introduction: The virtosome fraction of cell-free DNA, being newly synthesised, capable of horizontal gene transfer (HGT) and subsequent genomic incorporation and expression, may play crucial roles in the biological functions ... -
The continuous depolymerization of filled polytetrafluoroethylene with a continuous process
(Wiley, 2008)A new method for beneficiating unfilled as well as filled polytetrafluoroethylene (PTFE) waste has been developed. This process does not use any carrier gas while forming the depolymerization products. It enables polymer ... -
Contraction intensity and sex differences in knee-extensor fatigability
(Elsevier, 2017)Females are less fatigable than males during isometric contractions across various muscles and intensities. However, sex differences in knee-extensor fatigability remain relatively unexplored. Purpose: To determine the sex ... -
Contrasting impacts of cultivated exotics on the functional diversity of domestic gardens in three regions with different aridity
(Springer, 2020)Cultivated exotic plants are often introduced for their aesthetic value and today comprise a substantial fraction of the flora of urban domestic gardens. Yet, their relative contribution to the functional diversity of ... -
Contrasting indoor and ambient particulate matter concentrations and thermal comfort in coal and non-coal burning households at South Africa Highveld
(Elsevier, 2020)One of the key challenges noted in the sustainable development goals for good health and wellbeing (SDGs 3) is both ambient and household air pollution. Household solid fuel combustion represents one of the biggest threat ... -
The contribution of geography to Environmental Assessment (EA) practice and research in South Africa
(Taylor & Francis, 2016)After 100 years of academic Geography in South Africa, the emerging field of Environmental Assessment (EA) has occupied an important position vis-a-vis Geography. In this paper the contribution of Geography to practice and ... -
The contribution of millisecond pulsars to the Galactic cosmic-ray lepton spectrum
(Elsevier, 2015)Pulsars are believed to be sources of relativistic electrons and positrons. The abundance of detections of γγ-ray millisecond pulsars by Fermi Large Area Telescope coupled with their light curve characteristics that imply ... -
The contribution of physical and chemical sediment characteristics to environmental risk from an irrigation scheme in South Africa
(Springer, 2015)Purpose: The physical and chemical characteristics of sediment from a South African irrigation scheme were used to determine the sediment stressors within the system and to determine whether or not stressors have the ... -
The contribution of the C-824T tyrosine hydroxylase polymorphism to the prevalence of hypertension in a South African cohort: the SABPA study
(Taylor & Francis, 2013)The C-824T single nucleotide polymorphism in the promoter region of the tyrosine hydroxylase gene has been associated with hypertension. It is well documented that African South Africans exhibit a higher prevalence of ... -
A contribution to the conceptualisation of quality in impact assessment
(Elsevier, 2018)Quality is much sought after in, and a basic foundation for, good impact assessment (IA). However, the term is rarely defined, has an uncertain relationship with IA effectiveness, and it means different things to different ... -
A contribution to the knowledge of cheyletid mites of Iran with redescription of Eucheyletia flabellifera (Michael, 1878) (Prostigmata: Cheyletidae)
(Acarologia, 2018)The cheyletid mites collected from Guilan province in Northern Iran were investigated. A total of 16 species were determined. Of these, Eucheyletia flabellifera (Michael, 1878) is a new record for the Iranian cheyletid ... -
Contribution to the knowledge of the oribatid mite family Nesozetidae (Acari, Oribatida)
(Magnolia Press, 2017)A new oribatid mite species of the genus Nesozetes (Oribatida, Nesozetidae) is described from moss (Sphagnum sp.) on the seepage area below a permanent spring in South Africa. Nesozetes membranus sp. nov. differs from its ... -
Contribution towards a metabolite profile of the detoxification of benzoic acid through glycine conjugation: an intervention study
(PLoS, 2016)Benzoic acid is widely used as a preservative in food products and is detoxified in humans through glycine conjugation. Different viewpoints prevail on the physiological significance of the glycine conjugation reaction ... -
Contributions from nearby pulsars to the local cosmic ray electron spectrum
(Elsevier, 2008)PSR J0437-4715 is one of the closest millisecond pulsars (MSPs) to Earth, lying at a distance of _140 pc. This pulsar has a characteristic age of 4.9 Gyr and a relatively low spindown power of _1034 ergs/s. During its ... -
Contributions from nearby pulsars to the local cosmic ray electron spectrum
(Elsevier, 2008)PSR J0437-4715 is one of the closest millisecond pulsars (MSPs) to Earth, lying at a distance of ∼140 pc. This pulsar has a characteristic age of 4.9 Gyr and a relatively low spindown power of ∼1034 ergs/s. During its ... -
Conversation laws for a variable coefficient variant boussinesq system
(Hindawi Publishing Corporation, 2014)We construct the conservation laws for a variable coefficient variant Boussinesq system, which is a third-order system of two partial differential equations. This system does not have a Lagrangian and so we transform it ... -
Convolution algebra for extended Feller convolution
(Springer, 2020)We apply the recently introduced framework of admissible homomorphisms in the form of a convolution algebra of C2-valued admissible homomorphisms to handle two-dimensional uni-directional homogeneous stochastic kernels. ... -
Coordination behaviours of new (bidentate N,O-chelating) Schiff bases towards copper(II) and nickel(II) metal ions: synthesis, characterization, antimicrobial, antioxidant, and DFT studies
(SpringerSpringer, 2017)Two Schiff bases, HL1 and HL2, were synthesized in two different reactions involving 2-hydroxynaphthaldehyde with 2-amino-6-methylbenzothiazole and 2-amino-6-florobenzothiazole respectively. Copper(II) and nickel(II) ...