Author:Mhlongo, MI; Piater, LA; Steenkamp, Paul A; Madala, NE; Dubery, IADate:Jan 2015Previous studies suggest that only transisomers of chlorogenic acid (CGA) are naturally produced. Cis-isomers have been noted in some plant tissues exposed to different mechanical processes as well as untreated tobacco leaves exposed to ...Read more
Author:Zlobinsky, N; Johnson, D; Mishra, AK; Lysko, Albert ADate:Dec 2021Channel Assignment (CA) in wireless mesh networks (WMNs) has not been well studied in scenarios where the network uses Dynamic Spectrum Access (DSA). This work aims to fill some of this gap. We compare metaheuristic algorithms for optimising ...Read more
Author:Ozoemena, KI; Mamuru, SA; Fukuda, T; Kobayashi, N; Nyokong, TDate:Jun 2009Novel hexabutylsulphonyltribenzotetraazachlorin–fullerene (C60) complexes of iron (FeHBSTBTAC–C60) and cobalt (CoHBSTBTAC–C60) have been synthesized and their electrochemistry and oxygen reduction reaction (ORR) compared with their ...Read more
Author:Machaka, RonaldDate:Oct 2018While the metal injection moulding (MIM) of the precipitation-hardenable 17-4 PH stainless steel has found wide-ranging applications in a number of industries and popularity as a workhorse alloy, data on the as-sintered properties ‘that can ...Read more
Author:Mphahlele, N; Ozoemena, KI; Le Roux, Lukas J; Cele, LMDate:May 2011Dye solar cell (DSC) has become one of the attractive devices for the conversion of solar energy into electricity worldwide, because of their remarkable properties such as low cost, non-toxicity and easy to fabricate as compared to other ...Read more
Author:Mphahlele, NDate:Sep 2013This study reports the successful synthesis and integration of metallo-octacarboxyphthalocyanines-multi-walled carbon nanotubes (MOCPc-MWCNTs) (M = Zn, Ga(OH) and Si(OH)2) hybrid system for the application of dye solar cells. The metal ...Read more
Author:Mphahlele, NDate:Nov 2011This presentation investigates alternative photosensitisers used to enhance the performance and efficiency of dye solar cells. It looks at the synthesis, characterization and electrochemical evaluation of these dye solar cells.Read more
Author:Motaung, DE; Makgwane, Peter R; Ray, SSDate:Jul 2015We report the chemical synthesis of various ZnO nanostructures and TiO2 nanoparticles and their dispersion in a P3HT matrix. The photoluminescence studies revealed improved charge transport in the active layer of the optimized TiO2 nanoparticles ...Read more
Author:Kebede, Mesfin A; Palaniyandy, NithyadharseniDate:Dec 2019One of the main and crucial components of a lithium-ion battery (LIB) is the anode, a negative electrode as equally significant as the cathode positive electrode. Anodes are typically characterized by delivering a high capacity with low ...Read more
Author:Kebede, Mesfin A; Zheng, Haitao; Ozoemena, KIDate:Jul 2016Metal oxides such as TiO(sub2), Li(sub4)Ti(sub5)O(sub12), SnO(sub2), SnO, M(sub2)SnO(sub4) (M=ZnM=Zn, Co, Mn, Mg), TMO (TM=MnTM=Mn, Fe, Co, Ni, or Cu), TM(sub3)O(sub4) (TM=CoTM=Co, Fe, or Mn), and lithium alloys Li–Sn, Li–Si are among the ...Read more
Author:Maake, Popoti J; Bolokang, Amogelang S; Arendse, CJ; Vohra, V; Iwuoha, EI; Motaung, DEDate:Sep 2020The integration of noble metals nanostructures can be an effective method to improve the performance of organic solar cells by scattering the incident light that reaches the active layer. The resulting elongated active optical trail span of ...Read more
Author:Ozoemena, KI; Stefan-van Staden, RI; Nyokong, TDate:Jul 2009Novel electrochemical sensors based on carbon paste impregnated with metallopthalocyanine (MPc, M¼Co, Fe) complexes, have been constructed for the assay of anti-HIV drug 2’,3’-dideoxyinosine (didanosine, DDI). Both modified electrodes showed ...Read more
Author:Mathoho, Ipfi; Akinlabi, ET; Arthur, Nana KK; Tlotleng, Monnamme; Masina, Bathusile NDate:Mar 2019This study investigated the effect of laser peening on the surface integrity (surface roughness, microstructure and microhardness) of 17-4 PH stainless steel components which were built through the direct energy deposition (DED). Additive ...Read more
Author:Mutombo, KDate:Oct 2013Ti6Al4V laser manufactured samples were analysed using optical and scanning electron microscopy equipped with X-ray micro-analyser. The presence of a, a(sub2), ß, a', and a'' phases were determined using differential scanning calorimetry. The ...Read more
Author:Baisitse, TR; Botha, JR; Engelbrecht, JADate:Jul 2006Motivation for the research: Interest exists in III-V semiconducting materials (InAs, GaSb, InSb and related alloys) for the detection of infrared radiation; Such materials could be used as alternatives for future infrared detectors and various ...Read more
Author:Langmi, Henrietta W; Ren, Jianwei; Musyoka, Nicholas MDate:Aug 2015Over the past decade, hydrogen storage in metal-organic frameworks (MOFs) has received increasing attention worldwide because they possess versatile structures, high surface areas, large free volumes, ultrahigh porosities, and tunable pore ...Read more