Browsing Natural and Agricultural Sciences by Title
Now showing items 825-844 of 2708
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Ecosystem health of the Phongola floodplain, South Africa, based on fish diversity, community structure and health of selected species
(North-West University, 2015)Following the construction of the Pongolapoort Dam in 1974, the potential impacts on the lower Phongolo River and floodplain due to alterations in the natural flow regime have caused concerns. Fish communities and population ... -
Ecotourism potential of frogs in South Africa
(North-West University, 2018)Ecotourism is the fastest growing sector of the international travel industry, which in turn is one of the worlds’ largest and fastest growing industries. Ecotourism, defined as a visit to a fragile, unspoiled, and protected ... -
Ecotoxicity of CdTe and its functional groups on Enchytraeus albidus
(North-West University, 2018)Laboratory toxicity tests are used worldwide to assess the acute and chronic toxicity of specific pollutants to contribute towards the calculation of environmentally safe concentrations for nanomaterials (NMs). The field ... -
Ecotoxicological assessment of aflatoxin in soil under different temperature and moisture conditions utilising earthworms
(North-West University (South Africa), 2022)Aflatoxins are secondary metabolites produced by specific strains of fungi. These natural toxins are mainly found in soil, decaying vegetation, and food storage systems and are particularly abundant during drought stress. ... -
Ecotoxicological effect of CdTe quantum dots on Eisenia andrei
(North-West University (South Africa), 2020)Nanotechnology is a modern developing discipline producing a large quantity of consumer products, likely resulting in waste materials during the upcoming decades. Engineered nanoparticles with unique physicochemical ... -
The effect of a cabbage-carrot intercropping system on the incidence of cabbage pests
(North-West University, 2007)Cruciferous crops comprise one of the major crop divisions and contribute significantly to global crop production. Insect pests associated with cruciferous crops have the potential to destroy harvests. The diamondback ... -
The effect of a Fisk-Parker hybrid magnetic field on cosmic rays in the heliosphere
(North-West University, 2005)The existence of a Fisk-type heliospheric magnetic field (HMF) is one of the most debated questions in cosmic-ray modulation. Recently, Burger and Hitge [2004] developed a divergence-free Fisk-Parker hybrid magnetic field ... -
The effect of autohaemotherapy with different ozone concentrations on the oxidant/antioxidant status and DNA integrity of baboons
(North-West University, 2007)Ozone has unique biological properties that are applied in various medical fields. Ozone therapy is widely used to treat a number of medical conditions and although it has yielded very promising beneficial results, there ... -
The effect of Boophone disticha on the regulation of Brain Derived Neurotrophic Factor gene expression in BALB/c mouse model of depression
(North-West University (South Africa), 2022)The mental disorder of depression ranks high amongst heterogeneous and disabling conditions on earth. As a complex disease, depression can be characterized by combinations of genetic and environmental factors. The current ... -
Effect of Bradyrhizobium strains on the yield of accessions of Bambara groundnut ( Vigna subteraenea (L) Verdc)
(North-West University (South Africa), 2023)A sizeable component of human diets consists of underutilised legumes. These legumes fix atmospheric nitrogen, giving smaller growers an economic advantage. Utilising the legumes in the appropriate way can help increase ... -
The effect of C2-chlorohydrocarbons and their phytotoxic metabolites on photosynthesis of crop plants and natural vegetation
(North-West University (South Africa), 2002)The effect of C2-chlorohydrocarbons and their phytotoxic metabolites on photosynthesis of crop plants and natural vegetation: The emission of the highly volatile ~-chlorohydrocarbons tetrachloroethylene (TECE) and 1, ... -
The effect of cadmium on earthworms (Eisenia andrei) and their intestinal bacteria
(North-West University, 2018)Cadmium contamination, predominantly from anthropogenic activities such as mining, have a significant impact on soil organisms. It alters the abundance, diversity, community structure, ecological functions and the species ... -
The effect of combining reliability, availability and maintainability modelling and stochastic simulation modelling on production efficiency
(North-West University, 2019)Many world leaders in manufacturing are currently designing future facilities at various global locations. A Reliability, Availability and Maintainability (RAM) study is an important part of the basic engineering process. ... -
Effect of composted Phalaborwa ground phosphate rock on performance of grain sorghum grown on variable soil conditions
(North-West University (South Africa), 2020)Grain sorghum (Sorghum bicolor [L.] Moench), is a cereal crop that is indigenous to Africa. The desire to reduce the negative impact of industrial wastes on the environment through the use of inorganic fertilisers and ... -
Effect of cuticle surface and external structures of Lepidoptera larvae on entrapment of pesticide droplets
(North-West University (South Africa), 2022)An insect's defence mechanisms vary during its different development stages. Certain stages are more susceptible to insecticides than others, with the cuticle that varies in its composition. Insects can also develop ... -
Effect of dietary additives on growth performance, gut histology, blood parameters and tissue nutrient composition of the South African dusky kob, Argyrosomus japonicus
(North-West University (South Africa), 2018)The dusky kob, Argyrosomus japonicus, has been identified as a viable marine aquaculture species whose sustainable production can contribute to food and nutrition security in South Africa. For local dusky kob aquaculture ... -
Effect of dietary Moringa oleifera leaf meal on egg fertility and sperm quality of Potchefstroom koekoek indigenous chicken
(North-West University (South Africa), 2019)The current study was conducted to evaluate the effect of Moringa oleifera leaf meal (MOLM) inclusion in layer rations on growth performance, egg laying performance, egg quality parameters and hatchability performance of ... -
The effect of different magnetospheric structures on predictions of gamma-ray pulsar light curves
(North-West University (South Africa), 2015)The field of -ray pulsars has been revolutionised by the launch of the Fermi Large Area Telescope, increasing the population from 7 to 161 detected pulsars. The light curves of these y-ray pulsars exhibit a variety of ... -
The effect of different ozone concentrations on white blood cell energy homeostasis
(North-West University, 2006)Ozone therapy is an alternative form of therapy that has gained attention in the last couple of years. It is believed that O3 may exert a stimulatory effect on the antioxidant defence and immune systems and may therefore ... -
Effect of different plant substrates and growth hormones on the development characteristics and nutrient content of Pleurotus ostreatus in semi-arid conditions
(North-West University (South Africa), Mafikeng Campus, 2017)With the global and local need to identify low-cost sustainable sources of protein and essential minerals for human nutrition the study was undertaken to investigate effect of different plant growth substrates and hormones ...