Browsing Faculty of Natural Sciences by Title
Now showing items 257-276 of 2571
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Capacity to control oxidative stress-induced caspase-like activity determines the level of tolerance to salt stress in two contrasting maize genotypes
(Springer, 2013)The response of two maize (Zea mays L.) genotypes, named GR (salt-tolerant) and SK (salt-sensitive), to salt stress (150 mM NaCl) was investigated under controlled environmental growth conditions. Genotype SK experienced ... -
Capture zone simulation for boreholes located in fractured dykes using the linesink concept
(Water Research Commission, 2002)Delineation of capture zones for groundwater source protection is normally performed by using numerical codes which are based on the porous medium flow equation. However, boreholes are often sited in or along permeable ... -
Carbapenem resistance expressed by Gram-negative bacilli isolated from a cohort of Libyan patients
(BioMed Central, 2016)Background and objectives: Carbapenem-resistant Enterobacteriaceae (CRE) and other Gram-negative bacteria are among the most common pathogens responsible for both community and hospital acquired infection. The global spread ... -
Carbon futures trading and short-term price prediction: An analysis using the fractal market hypothesis and evolutionary computing
(MPDI, 2021)This paper presents trend prediction results based on backtesting of the European Union Emissions Trading Scheme futures market. This is based on the Intercontinental Exchange from 2005 to 2019. An alternative trend ... -
Carbon stock prediction in managed forest ecosystems using Bayesian and frequentist geostatistical techniques and new generation remote sensing metrics
(MDPI, 2023)The study compares the performance of a hierarchical Bayesian geostatistical methodology with a frequentist geostatistical approach, specifically, Kriging with External Drift (KED), for predicting C stock using prediction ... -
Carbonation of brine impacted fractionated coal fly ash: Implications for CO2 sequestration
(Elsevier, 2011)Coal combustion by-products such as fly ash (FA), brine and CO2 from coal fired power plants have the potential to impact negatively on the environment. FA and brine can contaminate the soil, surface and ground water through ... -
Carbonic anhydrase II based biosensing of carbon dioxide at high temperature: an analytical and MD simulation study
(OMICS International, 2018)Concentration of carbon dioxide (CO2) in the atmosphere has increased significantly due to anthropogenic activities and attributed as a major factor to global warming. Its detection by biosensing methods will provide ... -
Carcinoembryonic antigen immunosensor developed with organoclay nanogold composite film
(ESG, 2014)Organoclay nanogold composite were prepared using gold nanoparticles and the natural Cameroonian clay grafted with amino organosilane. The functionnalization of clay provided abundant amino group to assemble gold nanoparticles. ... -
Cardioprotective and anti-hypertensive effects of Prosopis glandulosa in rat models of pre-diabetes
(Clinics Cardive Publishing, 2013)AIM: Obesity and type 2 diabetes present with two debilitating complications, namely, hypertension and heart disease. The dried and ground pods of Prosopis glandulosa (commonly known as the Honey mesquite tree) which is ... -
Cardiovascular effects of the alkaloid hippadine on the isolated perfused rat heart
(Open Access Science Research Publisher, 2012)Crinum macowanii has been used extensively in traditional medicines for treatment of various illnesses such as oedema and ‘heart disease’. Previous studies of the crude bulb extracts on Langendorff perfused isolated rat ... -
Careful governance of African biobanks
(Elsevier, 2020)The Sydney Statement is one of the first framing documents on the principles for guiding global health security. Framing matters because the funding pool for development assistance for health is finite and has plateaued ... -
Carica papaya seed extract slows human sperm
(Elsevier, 2019)Ethnopharmacological relevance: Traditional healers use Carica papaya seeds as a remedy for diseases and as a contraceptive for men and abortion in women. Material and methods: Semen samples from 35 healthy men were allowed ... -
Carybdea branchi, sp. nov., a new box jellyfish (Cnidaria: Cubozoa) from South Africa.
(Magnolia Press, 2009)A common and conspicuous member of the medusan fauna of South Africa has been the subject of repeated taxonomic confusion. After having been mistakenly identified by earlier workers as either Carybdea alata or Tamoya ... -
CASA in invertebrates
(CSIRO Publishing, 2018)Sperm movement has been described in several phyla of invertebrates. Yet, sperm motility has only been quantified using computer-aided sperm analysis (CASA-Mot) in externally fertilising species (broadcast spawners) of ... -
Cashew nut testa tannin resin – preparation, characterization and adsorption studies
(Journal of Taibah University for Science, 2021-06)Adsorption of metal ions and dyes from water by cashew nut testa tannin resin (CATAR) was studied and the effects of temperature, initial pH, initial concentration and time were investigated. Scanning electron microscopy ... -
Castleman’s disease in the HIV-endemic setting
(Dovepress, 2018)Castleman’s disease (CD), first described by Benjamin Castleman in 1954, is a giant or angiofollicular lymph node hyperplasia, described as a rare monotypic polyclonal B-cell lymphoproliferative disorder with an incompletely ... -
Catalogue of South African mine tailings for geochemical carbon dioxide removal purposes
(Elsevier, 2023)South Africa has the potential to be a global leader in implementing strategies targeting geochemical carbon dioxide removal (CDR) using mine tailings, utilising methods for alkalinity production and mineral carbonation. This ... -
A catalogue with keys to the non-geniculate coralline algae (Corallinales, Rhodophyta) of South Africa
(Elsevier, 2008)Non-geniculate coralline red algae are common in all of the world’s oceans, where they often occupy close to 100% of the primary rocky substratum. The South African rocky subtidal and intertidal habitats in particular, ... -
Catalytic cracking of naphtha: The effect of Fe and Cr impregnated ZSM-5 on olefin selectivity
(Springer Nature, 2018)This study focuses on the modification of ZSM-5 in order to enhance the catalytic cracking of refinery naphtha to produce light olefins. ZSM-5 was metal modified using different loadings (0.5–5 wt%) of Fe and Cr via the ... -
Catalytic reduction of 4-nitrophenol and methylene blue by biogenic gold nanoparticles synthesized using Carpobrotus edulis fruit (sour fig) extract
(SAGE Publications, 2022)Along with the increasing requirement for efficient organic conversions using green chemistry, there is a need to develop highly efficient and eco-friendly catalytic reaction systems. Gold nanoparticles (AuNPs)-based ...