Top UN award for leading scientist
- National Research Foundation (NRF)
- 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
- Full Text:
- 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
- Full Text:
Toscana, the beautiful country where the jazz sounds
- Authors: Malagnini, Fabio
- Subjects: McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Blue Notes (Musical group : South Africa) , Jazz
- Language: Italian
- Type: Text
- Identifier: vital:13595 , http://hdl.handle.net/10962/d1012251 , McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Blue Notes (Musical group : South Africa) , Jazz
- Description: Photocopied article in Italian about jazz concerts in Toscana, Italy, by Chris McGregor and other jazz musicians.
- Full Text:
- Authors: Malagnini, Fabio
- Subjects: McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Blue Notes (Musical group : South Africa) , Jazz
- Language: Italian
- Type: Text
- Identifier: vital:13595 , http://hdl.handle.net/10962/d1012251 , McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Blue Notes (Musical group : South Africa) , Jazz
- Description: Photocopied article in Italian about jazz concerts in Toscana, Italy, by Chris McGregor and other jazz musicians.
- Full Text:
Total Music Meeting '80
- Unknown
- Authors: Unknown
- Subjects: McGregor, Chris -- 1936-1990 , Blue Notes (Musical group : South Africa) , Pukwana, Dudu , Moholo, Louis T.--1940- , Dyani, Johnny Mbizo
- Language: German
- Type: Text
- Identifier: vital:13792 , http://hdl.handle.net/10962/d1012825
- Description: Original program for the Berlin's music festival "Total Music Meeting '80", in Germany.
- Full Text:
- Authors: Unknown
- Subjects: McGregor, Chris -- 1936-1990 , Blue Notes (Musical group : South Africa) , Pukwana, Dudu , Moholo, Louis T.--1940- , Dyani, Johnny Mbizo
- Language: German
- Type: Text
- Identifier: vital:13792 , http://hdl.handle.net/10962/d1012825
- Description: Original program for the Berlin's music festival "Total Music Meeting '80", in Germany.
- Full Text:
Traveling without passport
- Authors: Nighthawk
- Language: French
- Type: Article
- Identifier: vital:13624 , http://hdl.handle.net/10962/d1012499
- Description: Photocopied article in French about 2 Piano solo performances of Chris McGregor at la Salle Bleue in Toulouse, France.
- Full Text:
- Authors: Nighthawk
- Language: French
- Type: Article
- Identifier: vital:13624 , http://hdl.handle.net/10962/d1012499
- Description: Photocopied article in French about 2 Piano solo performances of Chris McGregor at la Salle Bleue in Toulouse, France.
- Full Text:
Tribological characteristics of polymers under high force small oscillating angular contact
- Authors: Bradfield, Jarad Wade
- Subjects: Tribology , Polymers.
- Language: English
- Type: Thesis , Masters , MTech (Mechanical Engineering)
- Identifier: vital:9637 , http://hdl.handle.net/10948/d1020598
- Description: This study was intended to establish which polymer material is best suited as the material for bushes used in high force small oscillating angular contact applications as typically found in a large sugar mill coupling. A Tribometer as well as a designed and manufactured Bearing Testing Machine, which simulates and accelerates the wear caused in the intended application, was used to determine the wear rates and coefficients of friction for seven polymer materials. Materials were selected for their superior mechanical and thermal properties. The Tribometer was fitted with a linear reciprocating rig, so as to simulate the small oscillating movement prevalent in the intended application. Each Tribometer test ran for a duration of two hours with a frequency of 33.1 Herts and a normal loading of 40N. Bearing Testing Machine tests were done under similar constraints but with 30kN loading present on the surface of a bushes inner race. These tests had a longer duration of 24 or 48 hours or until intense wearing occurred. Initially both testing methods will be analysed independently of each other in order to try and identify a relationship between the wear rate and coefficient of friction for the different polymers. The different testing methods’ results will be compared to each other in order to establish if a correlation between the materials tested could be found.
- Full Text:
- Authors: Bradfield, Jarad Wade
- Subjects: Tribology , Polymers.
- Language: English
- Type: Thesis , Masters , MTech (Mechanical Engineering)
- Identifier: vital:9637 , http://hdl.handle.net/10948/d1020598
- Description: This study was intended to establish which polymer material is best suited as the material for bushes used in high force small oscillating angular contact applications as typically found in a large sugar mill coupling. A Tribometer as well as a designed and manufactured Bearing Testing Machine, which simulates and accelerates the wear caused in the intended application, was used to determine the wear rates and coefficients of friction for seven polymer materials. Materials were selected for their superior mechanical and thermal properties. The Tribometer was fitted with a linear reciprocating rig, so as to simulate the small oscillating movement prevalent in the intended application. Each Tribometer test ran for a duration of two hours with a frequency of 33.1 Herts and a normal loading of 40N. Bearing Testing Machine tests were done under similar constraints but with 30kN loading present on the surface of a bushes inner race. These tests had a longer duration of 24 or 48 hours or until intense wearing occurred. Initially both testing methods will be analysed independently of each other in order to try and identify a relationship between the wear rate and coefficient of friction for the different polymers. The different testing methods’ results will be compared to each other in order to establish if a correlation between the materials tested could be found.
- Full Text:
Tribute to Chris McGregor with South African Friends and Christine Wodrascka Trio
- Authors: Toulouse (de), Marine
- Subjects: McGregor, Chris--1936-1990 , Christine Wodrascka Trio , Mothle, Ernest , Matthews, Gilbert
- Language: French
- Identifier: vital:13576 , http://hdl.handle.net/10962/d1006538 , McGregor, Chris--1936-1990 , Christine Wodrascka Trio , Mothle, Ernest , Matthews, Gilbert
- Description: Original poster for a concert tribute to Chris McGregor at l'Espace Bonnefoy in Toulouse, France, by Christine Wodrascka Trio and South African Friends.
- Full Text:
- Authors: Toulouse (de), Marine
- Subjects: McGregor, Chris--1936-1990 , Christine Wodrascka Trio , Mothle, Ernest , Matthews, Gilbert
- Language: French
- Identifier: vital:13576 , http://hdl.handle.net/10962/d1006538 , McGregor, Chris--1936-1990 , Christine Wodrascka Trio , Mothle, Ernest , Matthews, Gilbert
- Description: Original poster for a concert tribute to Chris McGregor at l'Espace Bonnefoy in Toulouse, France, by Christine Wodrascka Trio and South African Friends.
- Full Text:
Tribute to Chris McGregor, the apostle of Liberty, in Saint-Pastour
- Authors: Petit, Claude
- Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Language: French
- Identifier: vital:13506 , http://hdl.handle.net/10962/d1005769 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Description: Photocopied article from the French newspaper Sud-Ouest about Chris McGregor's funerals. A photo of the funerals at the church is also with the article.
- Full Text:
- Authors: Petit, Claude
- Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Language: French
- Identifier: vital:13506 , http://hdl.handle.net/10962/d1005769 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Description: Photocopied article from the French newspaper Sud-Ouest about Chris McGregor's funerals. A photo of the funerals at the church is also with the article.
- Full Text:
Tribute to jazz pianist Chris McGregor
- Authors: Seale, Tyrone
- Language: English
- Type: Article
- Identifier: vital:13648 , http://hdl.handle.net/10962/d1012557
- Description: Photocopied tribute to jazz pianist Chris McGregor from the newspaper Argus. A photo untitled "Chris McGregor, who died in self-exile in France last year" is also with the article.
- Full Text:
- Authors: Seale, Tyrone
- Language: English
- Type: Article
- Identifier: vital:13648 , http://hdl.handle.net/10962/d1012557
- Description: Photocopied tribute to jazz pianist Chris McGregor from the newspaper Argus. A photo untitled "Chris McGregor, who died in self-exile in France last year" is also with the article.
- Full Text:
Troubadours' adventures
- Authors: Nighthawk
- Language: French
- Type: Article
- Identifier: vital:13625 , http://hdl.handle.net/10962/d1012501
- Description: Photocopied article in French about a meeting at a restaurant between Chris McGregor and Barry Altschul with his Trio. The Trio is touring Europe. There is a picture of Barry Altschul with this article.
- Full Text:
- Authors: Nighthawk
- Language: French
- Type: Article
- Identifier: vital:13625 , http://hdl.handle.net/10962/d1012501
- Description: Photocopied article in French about a meeting at a restaurant between Chris McGregor and Barry Altschul with his Trio. The Trio is touring Europe. There is a picture of Barry Altschul with this article.
- Full Text:
Tuning the physico-electrochemical properties of novel cobalt (II) octa[(3,5-biscarboxylate)-phenoxy] phthalocyanine complex using phenylamine-functionalised SWCNTs
- Agboola, Bolade Oyeyinka, Ozoemena, Kenneth I., Nyokong, Tebello, Fukuda, Takamitsu, Kobayashi, Nagao
- 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
- Full Text: false
- 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
- Full Text: false
Ultrafast Photodynamics of the Indoline Dye D149 Adsorbed to Porous ZnO in Dye-Sensitized Solar Cells
- Rohwer, Egmont, Richter, Christoph, Heming, Nadine, Strauch, Kerstin, Litwinski, Christian, Nyokong, Tebello, Schlettwein, Derck, Schwoerer, Heinrich
- 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
- Full Text: false
- 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
- Full Text: false
Unemployment Insurance Fund
- UIF
- 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.
- Full Text:
- 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.
- Full Text:
Unsymmetrically Substituted Nickel Triazatetra-Benzcorrole and Phthalocynanine Complexes: Conjugation to Quantum Dots and Applications as Fluorescent “Turn ON” Sensors
- Adegoke, Oluwasesan, Nyokong, Tebello
- 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
- Full Text: false
- 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
- Full Text: false
VAT is a public issue - Take a public stand
- Co-ordinating Committee on VAT
- 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.
- Full Text:
- 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.
- Full Text:
Very Urgent
- Authors: Cooke, Jack
- Subjects: McGregor, Chris--1936-1990 , Pukwana, Dudu , Moholo, Louis T.--1940- , Blue Notes (Musical group : South Africa) , Jazz , Jazz musicians
- Language: English
- Type: Article
- Identifier: vital:13520 , http://hdl.handle.net/10962/d1006097 , McGregor, Chris--1936-1990 , Pukwana, Dudu , Moholo, Louis T.--1940- , Blue Notes (Musical group : South Africa) , Jazz , Jazz musicians
- Description: Photocopied article from the magazine Jazz Monthly about Chris McGregor's Blue Notes recording "Very Urgent" (Polydor).
- Full Text:
- Authors: Cooke, Jack
- Subjects: McGregor, Chris--1936-1990 , Pukwana, Dudu , Moholo, Louis T.--1940- , Blue Notes (Musical group : South Africa) , Jazz , Jazz musicians
- Language: English
- Type: Article
- Identifier: vital:13520 , http://hdl.handle.net/10962/d1006097 , McGregor, Chris--1936-1990 , Pukwana, Dudu , Moholo, Louis T.--1940- , Blue Notes (Musical group : South Africa) , Jazz , Jazz musicians
- Description: Photocopied article from the magazine Jazz Monthly about Chris McGregor's Blue Notes recording "Very Urgent" (Polydor).
- Full Text:
Vice-Chancellor's address to new students 1976
- Authors: Henderson, Derek Scott
- Subjects: Rhodes University
- Language: English
- Type: Text
- Identifier: vital:7337 , http://hdl.handle.net/10962/d1017066
- Full Text:
- Authors: Henderson, Derek Scott
- Subjects: Rhodes University
- Language: English
- Type: Text
- Identifier: vital:7337 , http://hdl.handle.net/10962/d1017066
- Full Text:
Vice-Chancellor's Annual Review 2004
- 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.
- Full Text:
- 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.
- Full Text:
Vice-Chancellor's message to new students, 1977
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7356 , http://hdl.handle.net/10962/d1017085
- Full Text:
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7356 , http://hdl.handle.net/10962/d1017085
- Full Text:
Vice-chancellor's speech for plaque ceremony: Chapel of St. May and all the Angels
- 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.
- Full Text:
- 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.
- Full Text:
Vice-Chancellor's statement on campus press censorship 1977
- Authors: Henderson, Derek Scott
- Subjects: Censorship -- Rhodes University
- Language: English
- Type: Text
- Identifier: vital:7349 , http://hdl.handle.net/10962/d1017078
- Full Text:
- Authors: Henderson, Derek Scott
- Subjects: Censorship -- Rhodes University
- Language: English
- Type: Text
- Identifier: vital:7349 , http://hdl.handle.net/10962/d1017078
- Full Text: