Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 2944-2963 of 4817
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'n Model van faktore wat die sukses van onderrigleer van tegnologie-gebaseerde modules beïnvloed
(LitNet, 2011)Dit wil voorkom asof daar groepe studente is wat meer probleme ondervind met die bemeestering van tegnologiegebaseerde modules as ander modules. Bestaande navorsing dui op spesifieke faktore wat sterk figureer in die sukses ... -
'n Model van faktore wat die sukses van onderrigleer van tegnologie–gebaseerde onderwerpe beinvloed
(Universiteit van Stellenbosch, 2011)There appear to be groups of students who experience more problems with the mastering of technology-based subjects (where technology is used, but is not the main subject of the study) than other (non-technology-based) ... -
'n Vergelyking van die Mollusca-diversiteit in die Mooirivier (Noordwes-Provinsie) soos gevind met opnames wat gemaak is in 1963 en weer 50 jaar later
(AOSIS, 2015)Die hoogste getal gedokumenteerde uitsterwings van enige belangrike taksonomiese groep word aan die Mollusca toegedig. Faktore wat hoofsaaklik hiervoor verantwoordelik is, sluit onder meer omgewingsveranderinge en ... -
N-gram based language identification of individual words
(PRASA, 2013)Various factors influence the accuracy with which the language of individual words can be classified using n-grams. We consider a South African text-based language identification (LID) task and experiment with two different ... -
N-Methyl-N,N,N-trioctylammonium chloride as a novel and green corrosion inhibitor for mild steel in an acid chloride medium: electrochemical, DFT and MD studies
(Royal Society of Chemistry, 2017)In the present work, N-methyl-N,N,N-trioctylammonium chloride (Aliquat 336) has been evaluated as a green and novel corrosion inhibitor for mild steel in a 1 M HCl solution using electrochemical impedance spectroscopy ... -
Nagumoea serrata, a new diatom species (Bacillariophyceae) found on seagrass from the south-eastern coast of Africa (Indian Ocean)
(Czech Phycological Society, 2020)A novel diatom species belonging to the genus Nagumoea is described based on detailed light and scanning electron microscopy observations. The new taxon was found abundantly in several samples collected from seagrass on ... -
The Namaqua rock mouse (Micaelamys namaquensis) as a potential reservoir and host of arthropod vectors of diseases of medical and veterinary importance in South Africa
(BioMed Central, 2014)Background The role of endemic murid rodents as hosts of arthropod vectors of diseases of medical and veterinary significance is well established in the northern hemisphere. In contrast, endemic murids are comparatively ... -
Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa
(Pensoft Publishers, 2014)The description of a new genus Nannodromus and a new species Nannodromus reveilleti (Acari: Anystides: Saxidromidae) from South Africa, based on adult males and females. -
Nanomaterials in the aquatic environment: a European Union United States perspective on the status of ecotoxicity testing, research priorities, and challenges ahead
(Wiley, 2016)The European Union–United States Communities of Research were established in 2012 to provide a platform for scientists to develop a “shared repertoire of protocols and methods to overcome nanotechnology environmental health ... -
Nanosecond laser irradiation synthesis of CdS nanoparticles in a PVA system
(Elsevier, 2014)We herein report a modified, in situ photolytic process for the nucleation and growth of cadmium sulphide nanoparticles in the presence of an optically transparent and semicrystalline polyvinyl alcohol (PVA) polymer ... -
Napier grass stunt disease in East Africa: farmers' perspectives on disease management
(Elsevier, 2015)Napier or Elephant grass (Pennisetum purpureum), the most important livestock fodder crop in East Africa, is under threat from Napier grass stunt (NGS) disease. This disease is caused by a phytoplasma, which is transmitted ... -
A national greenhouse gas inventory management system for South Africa
(NACA, 2017)South Africa has committed to reducing its contribution to the global GHG budget. It ratified the United Nations Framework Convention on Climate Change (UNFCCC) and the Kyoto Protocol. The UNFCCC stipulates that Non-Annex ... -
National Herbarium Plant Collecting Programme reveals new country and provincial distribution records from South African National Parks (Apocynaceae, Asteraceae & Xanthorrhoeaceae : Asphodeloideae)
(Magnolia Press, 2012)New country and provincial distribution records for South Africa of specimens collected mainly in various South African National Parks are reported on here. The taxa included in this contribution are of Orthanthera albida ... -
Natural antioxidant vitamins: a review of their beneficial roles in management of diabetes mellitus and its complications
(Pharmacotherapy Group, 2016)Diabetes mellitus is a complex and progressive metabolic disease which is associated with multiple complications. Chronic hyperglycaemia is the defining characteristic of diabetes mellitus. Hyperglycaemia leads to generation ... -
Natural compulsive‐like behaviour in the deer mouse (Peromyscus maniculatus bairdii) is associated with altered gut microbiota composition
(Wiley, 2020)Obsessive–compulsive disorder (OCD) is a psychiatric illness that significantly impacts affected patients and available treatments yield suboptimal therapeutic response. Recently, the role of the gut–brain axis (GBA) in ... -
Nature and origin of the protolith succession to the Paleoproterozoic Serra do Navio manganese deposit, Amapa Province, Brazil
(Elsevier, 2012)Until its closure in 1997, the Serra do Navio deposit, located in Amapá Province, Brazil, was one of the most important sources of high-grade manganese ore to the North American market. The high-grade manganese oxide ... -
Nature of intranight optical variability of BL Lacertae
(Oxford University Press, 2015)We present the results of extensive multiband intranight optical monitoring of BL Lacertae during 2010–2012. BL Lacertae was very active in this period and showed intense variability in almost all wavelengths. We extensively ... -
Nature of the molecular interaction between 1-ethyl-3-methylimidazolium methylsulfate ionic liquid with higher chain alcohol through binary mixtures containing thermophysical properties
(Elsevier, 2017)In this work, the sophisticated thermodynamic techniques: thermodynamic and thermophysical properties of binary mixtures of 1-ethyl-3-methylimidazolium [C2mim][MeSO4] with various organic solvents were determined at different ... -
Nature's enduring patterns: a path to systems literacy
(Wiley, 2020)The theme of this special issue, Nature's Enduring Patterns: A Path to Systems Literacy, was celebrated at the 63rd Meeting of the International Society for the Systems Sciences in Corvallis in July 2019. In a world dominated ... -
Nature, cause and effect of students' intuitive conceptions regarding changes in velocity
(Taylor & Francis, 2013)Perceptions of observed phenomena play an important role in information processing and are integral to learning. Unfortunately students’ perceptions based on their everyday-life observations often do not correlate with ...
