List of Titles

Authors: Mkentane, Luyolo , Holmes, Mike
Language: English
Type: Article
Identifier: vital:7214 , http://hdl.handle.net/10962/d1006425
Description: A RHODES University research professor who is championing ground-breaking research into a new cancer diagnosIs and treatment methodology has received a prestigious award after being nominated one of 10 Women of Excellence in South Africa.
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Authors: National Research Foundation (NRF)
Language: English
Type: Article
Identifier: vital:7193 , http://hdl.handle.net/10962/d1006357
Description: Professor Tebello Nyokong holds the DST/NRF funded chair in Medicinal Chemistry and Nanotechnology at Rhodes University
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Authors: Agboola, Bolade Oyeyinka , Ozoemena, Kenneth I. , Nyokong, Tebello , Fukuda, Takamitsu , Kobayashi, Nagao
Language: English
Type: Article
Identifier: vital:7238 , http://hdl.handle.net/10962/d1019689
Description: The integration of phenylamine-functionalised SWCNTs (SWCNT-phenylamine) with a novel cobalt (II) octa[(3,5-biscarboxylate)-phenoxy] phthalocyanine (CoOBPPc) complex has been described. The physical and electrochemical properties of the CoOBPPc-SWCNT-phenylamine hybrid were evaluated using spectroscopy (IR and UV–vis), field emission scanning electron microscopy and electrochemistry (cyclic voltammetry and electrochemical impedance spectroscopy). Integration of SWCNT-phenylamine resulted in the physical transformation of the CoOBCPPc from the usually bluish colour of cobalt phthalocyanine complexes to a beautiful bright green colour. In addition, the heterogeneous electron transfer kinetics and electrocatalytic properties of the CoOBCPPc were greatly enhanced following the attachment of the SWCNT-phenylamine. The potential electrocatalytic application of the hybrid was tested using β-nicotinamide adenine dinucleotide (NADH) as a model biological analyte. Interestingly, the onset oxidation potential of this analyte was significantly reduced (300 mV) by this hybrid compared to the bare electrode. , Original publication is available at http://dx.doi.org/doi:10.1016/j.carbon.2009.10.023
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Authors: Rohwer, Egmont , Richter, Christoph , Heming, Nadine , Strauch, Kerstin , Litwinski, Christian , Nyokong, Tebello , Schlettwein, Derck , Schwoerer, Heinrich
Language: English
Type: Article
Identifier: vital:7326 , http://hdl.handle.net/10962/d1020576
Description: We investigate the ultrafast dynamics of the photoinduced electron transfer between surface-adsorbed indoline D149 dye and porous ZnO as used in the working electrodes of dye-sensitized solar cells. Transient absorption spectroscopy was conducted on the dye in solution, on solid state samples and for the latter in contact to a I−/I3− redox electrolyte typical for dye-sensitized solar cells to elucidate the effect of each component in the observed dynamics. D149 in a solution of 1:1 acetonitrile and tert-butyl alcohol shows excited-state lifetimes of 300±50 ps. This signature is severely quenched when D149 is adsorbed to ZnO, with the fastest component of the decay trace measured at 150±20 fs due to the charge-transfer mechanism. Absorption bands of the oxidized dye molecule were investigated to determine regeneration times which are in excess of 1 ns. The addition of the redox electrolyte to the system results in faster regeneration times, of the order of 1 ns. , Original publication is available at http://dx.doi.org/10.1002/cphc.201200715
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Authors: UIF
Subjects: UIF
Language: English
Type: text
Identifier: http://hdl.handle.net/10962/160982 , vital:40574
Description: U.I.F. (Unemployment Insurance Fund) is an insurance scheme. The scheme pays money to a worker who has contributed to the fund and who is temporarily unemployed. Money paid into the Fund is paid out to workers who have become unemployed and under certain other circumstances that we will set out below.
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Authors: Adegoke, Oluwasesan , Nyokong, Tebello
Language: English
Type: Article
Identifier: vital:7311 , http://hdl.handle.net/10962/d1020403
Description: We report on the design and application of fluorescent nanoprobes based on the covalent linking of L-glutathione-capped CdSe@ZnS quantum dots (QDs) to newly synthesized unsymmetrically substituted nickel mercaptosuccinic acid triazatetra-benzcorrole (3) and phthalocyanine (4) complexes. Fluorescence quenching of the QDs occurred on conjugation to complexes 3 or 4. The nanoprobes were selectively screened in the presence of different cations and Hg2+ showed excellent affinity in “turning ON” the fluorescence of the nanoprobes. Experimental results showed that the sensitivity of QDs-4 towards Hg2+ was much higher than that of QDs-3 nanoprobe. The mechanism of reaction has been elucidated based on the ability of Hg2+ to coordinate with the sulphur atom of the Ni complex ring and apparently “turn ON” the fluorescence of the linked QDs. , Original publication is available at http://dx.doi.org/10.1007/s10895-013-1317-4
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Authors: Co-ordinating Committee on VAT
Subjects: VAT
Language: English
Type: text
Identifier: http://hdl.handle.net/10962/168944 , vital:41663
Description: Although VAT is now part of daily life, it can be changed. Tax laws are changed all the time in the normal course of events. Public opinion and public action can change VAT. But the public must act. The government’s record of disastrous financial management is costing us all — remember Mossgas? remember Inkathagate? It cannot go on. It is our democratic right and duty to press for changes that will make VAT serve the country. VAT enters every home in the country — it should be debated and managed as a public issue. We have already seen the value of action. There is overwhelming support for our demands to change VAT. That's why the government was forced to amend the VAT system twice in the few weeks before implementation.
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Language: English
Type: Article
Identifier: vital:7169 , http://hdl.handle.net/10962/d1006071
Description: The highlight of 2004 was the award of both the Vice-Chancellor's Senior Research Award and the SABC2 Shoprite-Checkers Woman of the Year Award (Science and Technology) to Professor Tebello Nyokong, whose research on the development of photosensitisers for photodynamic cancer therapy has received considerable attention.
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Authors: Henderson, Derek Scott
Language: English
Type: Text
Identifier: vital:7570 , http://hdl.handle.net/10962/d1018447
Description: Unveiling of the Plaque on the occasion of the Chaepl of St. Mary and all the Angels being declared a national monument, 9 February 1982.
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