Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 1667-1686 of 4825
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Experimental and theoretical studies of the adsorption and corrosion inhibition of 6-phenylpyridazine-3(2H)-thione on Carbon Steel in 2.0 M H3PO4 solution
(ESG, 2014)The corrosion inhibition efficiency of 6-phenylpyridazine-3(2H)-thione (PPT) for carbon steel in 2.0 M H?PO? has been studied using weight loss, polarization, electrochemical impedance spectroscopy and SEM techniques. The ... -
Experimental and theoretical studies on inhibition of mild steel corrosion by some synthesized polyurethane tri-block co-polymers
(Nature Publishing Group, 2016)Polyurethane based tri-block copolymers namely poly(N-vinylpyrrolidone)-b-polyurethane-b-poly(N-vinylpyrrolidone) (PNVP-PU) and poly(dimethylaminoethylmethacrylate)-b-polyurethane-b-poly(dimethylaminoethylmethacrylate) ... -
Experimental and theoretical studies on some selected ionic liquids with different cations/anions as corrosion inhibitors for mild steel in acidic medium
(Elsevier, 2016)Inhibition of mild steel corrosion in 1 M HCl solution by some alkylimidazolium-based ionic liquids (ILs) namely 1-ethyl-3-methylimidazolium ethylsulfate [EMIM]+[EtSO4]−, 1-ethyl-3-methylimidazolium acetate [EMIM]+[Ac]−, ... -
Experimental and theoretical studies on the corrosion inhibition of mild steel by some sulphonamides in aqueous HCl
(Royal Society of Chemistry, 2015)Corrosion inhibition studies of mild steel in aqueous HCl by some sulphonamides namely sulphamethazine (SMT), sulphachloropyridazine (SCP), sulphabenzamide (SBZ) and sulphaquinoxaline (SQX) has been investigated using ... -
Experimental climate warming enforces seed dormancy in South African Proteaceae but seedling drought resilience exceeds summer drought periods
(Springer, 2015)Two hypotheses—that elevated night-time temperatures due to climate warming would enforce post-fire dormancy of Proteaceae seed due to low moisture, and that periods without rain during summer would exceed desiccation ... -
Experimental comparison of the thermal performances of acetanilide, meso-erythritol and an In-Sn alloy in similar spherical capsules
(Elsevier, 2017)The thermal performances of acetanilide, meso-erythritol and an In-Sn alloy, as phase change materials (PCMs) for medium temperature applications, inside separate, spherical aluminum capsules are investigated. The average ... -
Experimental energy and exergy performance of a solar receiver for a domestic parabolic dish concentrator for teaching purposes
(ELSEVIER, 2014)An experimental setup to investigate the thermal performance of a cylindrical cavity receiver for an SK-14 parabolic dish concentrator is presented in this technical note. The thermal performance is evaluated using energy ... -
Experimental energy and exergy performance of a solar receiver for a domestic parabolic dish concentrator for teaching purposes
(ELSEVIER, 2014)An experimental setup to investigate the thermal performance of a cylindrical cavity receiver for an SK-14 parabolic dish concentrator is presented in this technical note. The thermal performance is evaluated using energy ... -
The experimental evaluation and molecular dynamics simulation of a heat-enhanced transdermal delivery system
(Springer, 2013)Transdermal delivery systems are useful in cases where preferred routes such as the oral route are not available. However, low overall extent of delivery is seen due to the permeation barrier posed by the skin. Chemical ... -
Experimental infection of small ruminants with bluetongue virus expressing Toggenburg Orbivirus proteins
(Elsevier, 2016)Bluetongue virus (BTV) is the prototype orbivirus (Reoviridae family, genus Orbivirus) consisting of more than 24 recognized serotypes or neutralization groups. Recently, new BTV serotypes in goats have been found; serotype ... -
Experimental rodent models of type 2 diabetes: a review
(Thomson Reuters, 2009)Due to the high prevalence of diabetes worldwide, extensive research is still being performed to develop new antidiabetic agents and determine their mechanisms of action. Consequently, a number of diabetic animal models ... -
Experimental, DFT and kinetic study of 1-octene metathesis with Hoveyda-Grubbs second generation precatalyst
(Elsevier, 2012)In this study we report the catalytic performance, reaction engineering kinetics and elucidation of the reaction mechanism using density functional theory (DFT) for the metathesis reaction of 1-octene in the presence of ... -
Experimental, quantum chemical and molecular dynamic simulations studies on the corrosion inhibition of mild steel by some carbazole derivatives
(Nature Publishing GroupNature Publishing Group, 2017)Five selected carbazole derivatives, namely carbazole, 3,6-dibromocarbazole, 2-hydroxycarbazole, 1,2,3,4-tetrahydrocarbazole and 9-(2-ethylhexyl)carbazole-3,6-dicarboxaldehyde were investigated for their inhibitive effects ... -
Experimental, quantum chemical and Monte Carlo simulation studies of 3,5-disubstituted-4-amino-1,2,4-triazoles as corrosion inhibitors on mild steel in acidic medium
(Elsevier, 2016)The inhibition properties of two 3,5-bis (disubstituted)-4-amino-1, 2,4-triazole derivatives, namely 3,5-bis(4-methoxyphenyl)-4-amino-1,2,4-triazole (T1) and 3,5-bis(4-chlorophenyl)-4-amino-1,2,4-triazole (T2) were ... -
Experimental, quantum chemical and Monte Carlo simulation studies on the corrosion inhibition of some alkyl imidazolium ionic liquids containing tetrafluoroborate anion on mild steel in acidic medium
(Elsevier Science Bv, 2015)The inhibition of mild steel corrosion in 1 M HCl solution by some imidazolium-based ionic liquids (ILs), namely 1-ethyl-3-methylimidazolium tetrafluoroborate [EMIM]?[BF?]?, 1-butyl-2,3-dimethylimidazolium tetrafluoroborate ... -
Experiments to improve forecasting accuracy of regression models with minimal assumptions
(ORLab Analytics, 2010)The forecasting accuracy of a regression model relies heavily on the applicability of the assumptions made by the model builder. In addition, the presence of outliers may also lead to models that are not reliable and thus ... -
Exploiting high-energy polarization in blazars
(Sissa Medialab, 2018)The spectral energy distributions (SEDs) and variability of astrophysical sources can be modeled in many different ways, in particular, the production of X-rays and γ-rays in the SEDs of blazars. High-energy polarimetry ... -
Exploiting morphological data from Pulsar Wind Nebulae via a spatiotemporal leptonic transport code
(Oxford Univ Press, 2020)The next era of ground-based Cherenkov telescope development will see a great increase in both quantity and quality of γ-ray morphological data. This initiated the development of a spatiotemporal leptonic transport code ... -
An exploration of cultural beliefs and practices across the Southern Ground-Hornbill’s range in Africa
(BioMed Central, 2014)Background This article explores cultural beliefs and practices related to the Southern Ground-Hornbill (SGH) (Bucorvus leadbeateri) in nine southern and east-African countries. Methods A qualitative, thematic ... -
An exploration of social systems as informative for urban regeneration in Potchefstroom Central Business District
(AJOL, 2015)The future of cities undoubtedly spells change on many levels due to urban growth. One of the mechanisms used in cities to cope with change is urban regeneration. Urban regeneration has mainly been addressed through ...