Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 1380-1399 of 4825
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The effect of molar ratio and flow velocity on the surface area required for pertraction of a Zr/Hf mixture
(IOP, 2019)Zirconium (Zr) and hafnium (Hf) need to be separated before being used in nuclear applications. Equilibria data have shown that Hf can be selectively extracted over Zr from a sulphate medium using organophosphorus ... -
The effect of myalgic encephalomyelitis/ chronic fatigue syndrome (ME/CFS) severity on cellular bioenergetic function
(Public Library of Science, 2020)Myalgic encephalomyelitis/ Chronic fatigue syndrome (ME/CFS) has been associated with abnormalities in mitochondrial function. In this study we have analysed previous bioenergetics data in peripheral blood mononuclear cells ... -
Effect of nanoparticle metal composition: mono- and bimetallic gold/copper dendrimer stabilized nanoparticles as solvent-free styrene oxidation catalysts
(Springer, 2018)A range of mono- and bimetallic AumCun nanoparticles (NPs), with varying metal compositions, was prepared by using a third-generation diaminobutane poly(propylene imine) (G3 DAB-PPI) dendrimer, modified with alkyl chains, ... -
The effect of nest site orientation on the breeding success of blue swallows Hirundo atrocaerulea in South Africa
(Wiley, 2018)The globally threatened blue swallow Hirundo atrocaerulea, with <1500 pairs remaining, is an intra-African migrant, breeding in eight countries in East Africa and Southern Africa, with nonbreeding birds in four countries ... -
The effect of ozone and drought on the photosynthetic performance of canola
(Elsevier, 2018)Canola plants were fumigated in open-top chambers with ozone (O3) (120 ppb) under well-watered (WW) and water-stressed (WS) conditions for 4 weeks. Non-fumigated plants were also studied to facilitate comparison between ... -
Effect of ozone on photosynthesis and seed yield of sensitive (S156) and resistant (R123) Phaseolus VulgarisL. genotypes in open-top chambers
(Springer, 2013)Rising tropospheric ozone (O3) concentrations have been identified as a significant threat to crop production. In the present study two snap bean (Phaseolus vulgaris L.) genotypes with known difference in sensitivity to ... -
Effect of phosphorus and calcium supplementation on goat performance communally grazed in a semi-arid area of RSA
(WFL Publisher, 2017)This research was conducted at the Molelwane Farm, in the Department of Animal Health, North West University, Mafikeng Campus, North West Province, RSA. Mafikeng city is located at 25°52’S and 25°38’E. In this study, a ... -
Effect of pit-composting on root-knot nematode (Meloidogyne incognita and M. javanica) population densities and yield of tomato under field conditions
(Taylor & Francis, 2020)Soil amendments, constituting of various plant and animal sources, were evaluated in pits for their effects on Meloidogyne spp. infecting tomato in comparison to the synthetic nematicide fenamiphos and the untreated control. ... -
Effect of pre-treatment and preservation methods on the nutritional quality of bitter gourd leaves from two different sources
(Gaurav Society of Aric, 2017)The effects of pre-treatment and preservation methods on the mineral composition and nutritional quality of bitter gourd leaves harvested from the wild and around homestead were investigated. The pre-treatments consisted ... -
Effect of proline‐enriched abalone feed on selected metabolite levels of slow‐growing adult Haliotis midae
(Wiley, 2019)Abalone is currently considered South Africa's most successfully produced aquacul‐ ture export product, with a 76% share of the total value generated by the aquaculture sector. A major risk factor for this sector is slow ... -
The effect of rainfall amount and timing on annual transpiration in grazed savanna grassland
(EGU, 2020)The role of precipitation (P) variability on evapotranspiration (ET) and its two components transpiration (T) and evaporation (E) rates from savannas continues to draw significant research interest given its relevance to ... -
The effect of rapid thermal annealing on sputtered Pt and Pt3Pd2 thin film electrocatalysts for aqueous SO2 electro-oxidation
(Springer, 2016)Insight into the effect that rapid thermal annealing (RTA) has on the structural and electrochemical characteristics of sputtered Pt and Pt3Pd2 thin film electrocatalysts is communicated. The DC magnetron sputtered thin ... -
The effect of reseeding methods on secondary succession during cropland restoration in the Highveld region of South Africa
(Taylor & Francis/NICS, 2011)The Grassland biome is the most transformed biome in South Africa, with cultivation and other human impacts having the largest effect on pristine grasslands. Conversion of natural grassland to cropland agriculture destroys ... -
Effect of seaweed extract and bradirhizobium inoculation on growth, nodulation and yield attributes of Cowpea (Vigna Unguiculata L Walp) under tunnel house and field conditions
(EDP Open, 2017)A 3-factorial agronomic experiment was carried out under field and tunnel house conditions to investigate the effect of seaweed extract and Bradyrhizobium inoculation on cowpea growth and performance. In both trials, ... -
Effect of sodium compounds on the sintering propensity of coal-associated minerals
(Elsevier, 2015)This study focused on the chemistry involved in sintering of coal-associated minerals during combustion and inert conditions. Changes in mechanical strength were recorded with compressive strength measurements. This method ... -
Effect of some nitrogen donor ligands on the optical and structural properties of CdS nanoparticles
(RSC, 2013)The cadmium complex of N-ethyl-N-phenyl dithiocarbamate, 1, and its 2,20-bipyridine and 1,10-phenanthroline adducts, 2, and 3, respectively, have been used as single source precursors for the synthesis of CdS nanoparticles. ... -
The effect of sputtered Pt40Pd57Al3 thin film thickness on SO2(aq) electro-oxidation
(Springer, 2019)The influence of sputtered Pt40Pd57Al3 thin films of varying thickness, in the as-deposited (AD) and annealed (AN) state, was investigated for the electro-oxidation of aqueous SO2. From physical characterisation (scanning ... -
The effect of sputtered Pt40Pd57Al3 thin film thickness on SO2(aq) electro-oxidation
(Springer, 2019)The influence of sputtered Pt40Pd57Al3 thin films of varying thickness, in the as-deposited (AD) and annealed (AN) state, was investigated for the electro-oxidation of aqueous SO2. From physical characterisation (scanning ... -
The effect of sputtered Pt40Pd57Al3 thin film thickness on SO2(aq) electro-oxidation
(Springer, 2019)The influence of sputtered Pt40Pd57Al3 thin films of varying thickness, in the as-deposited (AD) and annealed (AN) state, was investigated for the electro-oxidation of aqueous SO2. From physical characterisation (scanning ... -
Effect of surface treatment on the bioactivity and electrochemical behavior of magnesium alloys in simulated body fluid
(Wiley, 2017)The effect of surface treatment using NaOH or H2O2 on the bioactivity and corrosion behavior of AZX310, AZ91D, AM50, and AZ31 Mg alloys in simulated body fluid (SBF) has been studied with the aid of surface morphological ...