Author:Salehiyan, Reza; Malwela, Thomas; Ray, Suprakas SDate:May 2017Time-resolved mechanical spectroscopy (TRMS) was conducted to study the thermo-oxidative degradation of linear low density polyethylene (LLDPE) samples with different thermal histories and their blends with a polyamide (PA6) in the melt state. ...Read more
Author:Rossouw, CL; Chetty, A; Moolman, FS; Birkholtz, L-M; Hoppe, H; Mancama, Dalubuhle TDate:Aug 2012The thermo-responsive polymer poly(Nisopropylacrylamide) has received widespread attention for its in vitro application in the non-invasive, nondestructive release of adherent cells on two dimensional surfaces. In this study, 3D non-woven ...Read more
Author:Prins, SN; Cornish, LA; Stumpf, WE; Sundman, BDate:Mar 2003The CALPHAD technique was used to calculate the Al-Ru binary phase diagram. The RuAl (B2) phase was described with the sublattice model (SL), also designated Compound Energy Formalism (CEF), as well as the Modified Sublattice Formalism (MSL), ...Read more
Author:Nabarro, FRN; Cress, CM; Kotschy, PDate:Aug 1996Eshelby’s energy-momentum tensor is used to provide an analytical expression for the driving force for rafting in the elastic regime in a super alloy with a high volume fraction of gamma'. The structure is modeled as a simple cubic array of ...Read more
Author:Baloyi, J; Bello-Ochende, T; Meyer, JPDate:Jun 2014An analysis of irreversibilities generated due to combustion in an adiabatic combustor burning wood was conducted. This was done for a reactant mixture varying from a rich to a lean mixture. A non-adiabatic non-premixed combustion model of a ...Read more
Author:Fosso-Kankeu, E; Mittal, Hemant; Waanders, F; Ray, Suprakas SDate:Apr 2017This research paper reports on the utilization of the hydrogel of gelatine (GL) and its hybrid nanocomposite with clinoptilolite for the adsorption of Cd2+ ions from an aqueous solution and multi-metal ions from mine effluents. The hydrogel ...Read more
Author:Howden, MGDate:Apr 1993Thermogravimetry was determined on a series of alpha, omega-diaminoalkanes, in which the alkane chain contained from three to eight carbon atoms that were located in zeolite ZSM-5 during synthesis. Of the series, 1, 6-diaminohexane functions ...Read more
Author:Mahlangu, Thembisile P; Das, R; Abia, LK; Onyango, M; Ray, Suprakas S; Maity, ArjunDate:Jan 2019A magnetic nanocomposite (NC), Fe3O4@PPy-MAA, was synthesised via in situ oxidative polymerisation of the pyrrole monomer in a thioglycolic acid (mercaptoacetic acid) solution (as a dopant), in the presence of iron oxide (Fe3O4). The newly ...Read more
Author:Mabhali, Luyolo AB; Sacks, N; Pityana, Sisa LDate:Jun 2012Laser surface alloying of aluminium AA1200 was performed with a 4 kW Nd:YAG laser to improve the abrasion wear resistance. Aluminium surfaces reinforced with metal matrix composites and intermetallic phases were achieved. The phases present ...Read more
Author:Van Wilgen, BW; Richardson, DMDate:May 2012Alien conifers, mainly pines, have been planted in South Africa for a range of purposes for over 300 years. Formal plantations cover 660 000 ha of the country, and invasive stands of varying density occur on a further 2.9 million ha. These ...Read more
Author:Meyers, Bronwyn C; Snedden, Glen C; Meyer, JP; Roos, TH; Mahmood, GIDate:Nov 2012A stereoscopic particle image velocimetry (PIV) system was used to obtain the velocity field of a can-type combustor in the non-reacting condition. In order for these measurements to be taken, an optically accessible can-type forward flow ...Read more
Author:Fourie, CJS; Van Dam, CLDate:2008All electromagnetic geophysical methods, but the frequency domain methods in particular, depend on the skindepth as a guide to the depth of investigation or penetration from the surface. By definition the skindepth is the distance where the ...Read more
Author:Anochie-Boateng, Joseph; Komba, Julius J; Mvelase, Gculisile MDate:Jun 2013There is a need to improve the measurements of shape characteristics of aggregates and ballast materials used in the construction of road, airfield, and railway track infrastructures. The fundamental shape properties of aggregate and ballast, ...Read more
Author:Dabrowski, J; Oberholster, Paul J; Steyl, J; Osthoff, G; Hugo, A; Power, DM; Van Wyk, JHDate:Jul 2017Thyroid function and nutritional indicators were measured in obese, steatitis-affected Mozambique tilapia Oreochromis mossambicus from Loskop Reservoir (LR), South Africa. Plasma thyroid hormones (especially T3) and thyroid follicle histomorphology ...Read more
Author:Nabarro, FRNDate:15 Jul 2001Under certain conditions, the plastic extension of a sample subjected to a constant stress is to a good approximation proportional to the logarithm of the time. Similarly, if a sample is plastically strained and unloaded, there are changes ...Read more
Author:Malan, DFDate:Apr 1999Although hard rock is not usually associated with large creep deformation, significant time-dependent behaviour is observed in the tabular excavations of the South African gold mines. Time-dependent closure data was collected in stopes of the ...Read more
Author:Kabongo, GL; Mbule, PS; Mhlongo, Gugu H; Mothudi, BM; Dhlamini, MSDate:Jan 2020The fluorescence vibrational features of as-synthesized P3HT–ZnO:Ho3+ and P3HT–ZnO:Tm3+ thin films were investigated using Gaussian analysis. Relative to P3HT–ZnO:Tm3+ film, detailed Gaussian analysis of the fluorescence spectra revealed ...Read more
Author:Kanda, P; Burke, Michael G; Gupta, RDate:Sep 2018We analyse the dynamics of the causal interaction between the stock and foreign exchange markets for the United Kingdom using monthly data going as far back as 1791. First, we consider static causality tests, yielding mixed results. Given the ...Read more
Author:Kebede, Mesfin ADate:Jun 2020Tin oxide, SnO2, is a suitable anode for both lithium-ion and sodium-ion batteries (LIBs and SIBs) unlike graphite and silicon, which are only suitable anodes for LIB. SnO2 has garnered much attention because of its high theoretical capacities ...Read more