Browsing Natural and Agricultural Sciences by Title
Now showing items 670-689 of 2707
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The development of non-heme N4-tetradentate Manganese(II) complexes for alcohol oxidation
(North-West University (South Africa), 2019)A series of known and novel non-heme N₄-tetradentate ligands, R,R- and S,S-L5 - L12, of the BPMCN type (BPMCN = N,N'-dimethyl-N,N'-bis(2-pyridylmethyl)-(R,R/S,S)-1,2-diaminocyclo-hexane) containing different N-donors ... -
The development of novel copper-based catalysts for the oxidative transformation of organic substrates
(North-West University (South Africa), 2021)"Abstract not copied" -
Development of novel PBI-blended membranes for SO2 electrolysis
(North-West University (South Africa), 2019-05)In light of the increased applicability of hydrogen as a clean alternative fuel source, the demand for hydrogen and the subsequent production thereof is expected to grow significantly in the near future. From the hydrogen ... -
Development of NWU soil database as a precursor for a national soil database
(North-West University (South Africa), 2022)The availability of a high-quality database that captures the spatial variability of soil properties in South Africa, will promote the long-term sustainable use of soil in the country. In agriculture, data on the variability ... -
Development of quantitative 1H-NMR method for serum iron with application to infectious diseases
(North-West University (South Africa), 2021)Accurate quantification methods for biologically important elements are crucial for the diagnosis, treatment and monitoring of infectious diseases. Current methods are chemistry based, expensive, time consuming and are not ... -
Development of resistance by fall armyworm (Spodoptera frugiperda) to Cry proteins in Bt maize
(North-West University (South Africa), 2022)The fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) has become one of the most damaging agricultural pests since it was first recorded outside of its native area of the Americas in 2016. ... -
The development of the conceptual understanding of first-year chemistry university students in stoichiometry using thinking skills, visualization and metacognitive strategies
(North-West University, 2015)First-year chemistry was identified by the North West University Potchefstroom Campus as one of the modules with a low pass rate. It is clear that students often memorise definitions and formulae, without understanding the ... -
DFT model development of V2O5-TiO2 catalyst for oxidation of mercury pollutants
(North-West University (South Africa), 2019)Mercury pollution in South Africa is a growing problem due to the country’s dependency on coal combustion for generating electricity. During coal combustion, mercury can be emitted as elemental mercury (Hg0), in its oxidized ... -
Diagnostic mathematics assessment : the impact of the GIST model on learners with learning barriers in mathematics
(North-West University, 2011)Assessment, as an integral part of teaching and learning, gained unprecedented prominence in the curriculum in South Africa post 1994. When the new curriculum was introduced, it was assumed that teachers would effortlessly ... -
Diatom diversity and response to water quality within the Makuleke Wetlands and Lake Sibaya
(North-West University (South Africa), Potchefstroom Campus, 2017)All forms of life are dependent on water for survival. South Africa is a water scare country, due to seasonal rainfall and high temperatures, thus it is important to manage water resources in such a way that it benefits ... -
The diatom types of M. Giffen from Kidd’s Beach, Eastern Cape, South Africa
(North-West University (South Africa), 2022)Marine littoral diatoms are rarely studied and are important in the littoral zone ecosystem. Diatoms contribute to numerous aquatic ecosystem functions including: primary productivity, sediment binding, and stability. ... -
Diatoms as indicators of water quality change from drought to flood conditions in the Kruger National Park
(North-West University (South Africa), 2023)Water as a resource is important for all living organisms and forms the very basis of life. The transportation of water, around the globe, forms the hydrologic cycle. This cycle includes precipitation, evaporation, and ... -
Diatoms as water quality indicators in the upper reaches of the Great Fish River, Eastern Cape
(North-West University (South Africa), 2015)The Karoo has been exposed to some form of agricultural activity since the early 1900s. This has resulted in the modification of the rivers in this region. Modifications include weirs, dams and removal of riparian vegetation ... -
The diatoms of the Western Cape and their use in monitoring wetland water quality
(North-West University (South Africa), 2016)South Africa’s water resources are limited and, in global terms, scarce. The demand for water is, however, growing continuously due to population growth, a developing economy, global warming, the spreading of alien plant ... -
Die aanwending van toerisme, opelugontspanning en natuurbewaring as stimulus vir die ontwikkeling van 'n agtergeblewe gebied, met spesiale toepassing op Maputaland
(North-West University (South Africa), 1979)"No abstract" -
Die akarofauna op pynappelplante en hulle moontlike verband met die voorkoms van swartvlek
(North-West University (South Africa), 1977)Blackspot is a common pineapple disease in many countries. The fungi Penicillium funiculosum and Fusarium moniliforme, which occur in the blossom cavities on the old flower parts and are usually recovered from the rot, ... -
Die asimptotiese verdeling van kwadratiese vorme in onafhanklike stogastiese veranderlikes met toepassing op sekere passingstoetse
(North-West University (South Africa), 1972)In hierdie hoofstuk word daar eerstens 'n oorsig gegee van die stogastiese proses benadering tot die bepaling van die asimptotiese verdeling van sekere passingstoetsgroothede. (Sien bv. Anderson en Darling (1952); Kac, ... -
Die assimilering van chlorella spp. deur twee varswaterslakspesies
(North-West University (South Africa), 1979)The assimilation of the alga Chlorella by the freshwater snails Buli nus (Physopsis) africanus (Krauss) and Bulinus (Bulinus) tropicus (Krauss) was investigated. Algae, collected from the snails' habitat were cultured ... -
Die beheer van die kardiopulmonêre bloedvolume en slagvolume by normale en versakende harte van skape
(North-West University (South Africa), 1987)In this study use was made of volume expansion with dextran on sheep with normal hearts and with cardiac failure in order to examine the mechanisms which are important in the control of the relation of the cardiopulmonary ... -
Die beheer van hartspierkontraktiliteit deur die beweging van kalsiumione deur die sarkolemma
(North-West University (South Africa), 1978)In this study 45 Ca-fluxes and contractures were done. Characteristics of contractures at low extracellular K+-concentrations and low extracellular Na+-concentrations were evaluated by means of 45 Ca-fluxes. Experimental ...