Author:Maduray, K; Karsten, A; Odhav, B; Nyokong, TDate:Jun 2010Aluminium and zinc tetrasulfophthalocyanines were activated with a 672nm wavelength laser to investigate the photodynamic effects on melanoma cancer, dermal fibroblast and epidermal keratinocyte cells. Aluminium tetrasulfophthalocyanine was ...Read more
Author:Maduray, K; Karsten, A; Odhav, B; Nyokong, TDate:Jun 2010Photodynamic therapy (PDT) represents a novel treatment that uses a photosensitizer (PS), light source (laser) of an appropriate wavelength and oxygen to induce cell death in cancer cells. The aim of this study was to investigate the photodynamic ...Read more
Author:Ama, Monday O; Wilson, AW; Ray, Suprakas SDate:Aug 2019The present study reports the application of three electrodes, consisting of exfoliated graphite (EG), EG and zirconium oxide (EG-ZrO2), and EG and silver-doped zirconium oxide (EG/Ag-ZrO2) in a comparative photoelectrochemical degradation ...Read more
Author:Chamier, J; Crouch, AM; Leaner, J; Oberholster, Paul JDate:01 Sep 2010Toxic heavy metals in air, soil, and water are global problems that are a growing threat to the environment. Trace metal determination is currently done by expensive separation techniques which include inductively coupled plasma (ICP) and ...Read more
Author:Mphahlele, NDate:Apr 2013Significant attention is being paid to dye solar cells (DSCs) as the next generation in solar cell technology for their low cost alternative to the currently implemented solid state solar cells [1]. In these devices, photosensitisers are one ...Read more
Author:Sikhwivhilu, LM; Mpelane, S; Mwakikunga, Bonex W; Ray, Suprakas SDate:Mar 2012Titanium dioxide (TiO2) nanostructures were synthesized by microwave-assisted and conventionally heated hydrothermal treatment of TiO2 powder. The tubular structures were converted to a rodlike shape by sintering the samples at various ...Read more
Author:Kabongo, GL; Mbule, PS; Mhlongo, Gugu H; Mothudi, BM; Hillie, Kenneth T; Dhlamini, MSDate:Dec 2016In this article, we demonstrate the surface effect and optoelectronic properties of holmium (Ho(sup3+))-doped ZnO in P3HT polymer nanocomposite. We incorporated ZnO:Ho(sup3+) (0.5 mol% Ho) nanostructures in the pristine P3HT-conjugated polymer ...Read more
Author:Bollig, C; Forbes, A; Dlamini, TDate:Dec 2007This document gives an overview of the development of photonics in South Africa. The development of science, engineering and technology (SET) has been identified as one of the key elements for the long-term sustainability and competitiveness ...Read more
Author:Mthunzi-Kufa, Patience; Dholakia, K; Gunn-Moore, FDate:Jul 2010Recently, femtosecond laser pulses have been utilized for the targeted introduction of genetic matter into mammalian cells. This rapidly expanding and developing novel optical technique using a tightly focused laser light beam is called ...Read more
Author:Tazvinga, Henerica; Hove, TDate:Oct 2010Many rural areas of developing countries lack supply of electricity due to poor distribution of grid electricity and financial resources to aid grid extension. These countries usually have under capacity in electricity generation with the ...Read more
Author:Cummings, FDate:Sep 2009Photovoltaic (PV) is the direct conversion of sunlight into electrical energy through a solar cell. This presentation consists of an introduction to photovoltaics, the South African PV research roadmap, a look at the CSIR PV research and ...Read more
Author:Fatoki, OS; Bornman, M; Ravandhalala, L; Chimuka, L; Genthe, Bettina; Adeniyi, ADate:Jan 2010Phthalate ester plasticizers were determined in rivers and dams of the Venda region, South Africa. Liquid-liquid extraction, column chromatographic clean-up and capillary gas chromatography were the methods used for the quantitative analyses. ...Read more
Author:Oni, J; Ozoemena, KIDate:Aug 2012Numerous are the ways through which phthalocyanines have been put into very good use. The on-going search for new energy storage and conversion systems has made phthalocyanines even prettier as alternatives to metal and metal oxide catalysts ...Read more
Author:Moodie, BDate:1975There are two variations in every coal seam seam namely type and rank. Type is determined by the plant material from which the coal was formed and rank is the degree of maturation or metamorphism. Rank is the most important property of a ...Read more
Author:Berry, HDate:1949The No. 4 seam at this colliery, judging from the diagrammatic representations at the end of the report, appears to maintain a uniform structure and a fairly consistent thickness throughout the mine.Read more