The use of phthalocyanines in cancer therapy
- Nyokong, Tebello, Gledhill, Igle
- Authors: Nyokong, Tebello , Gledhill, Igle
- Language: English
- Type: Article
- Identifier: vital:7323 , http://hdl.handle.net/10962/d1020572
- Description: Phthalocyanines are synthetic analogues of porphyrins employed as photosensitizers in cancer therapy. We present the history of photodynamic therapy and developments in the use of phthalocyanines as photosensitizers. New efforts in the development of more cancer-specific phthalocyanines are presented. The combination of phthalocyanines with nanoparticles for "combination therapy" of cancer is also discussed. The nanoparticles employed are quantum dots, gold, and magnetic nanoparticles. , Original publication is available at http://dx.doi.org/10.10631.4794220
- Full Text: false
- Authors: Nyokong, Tebello , Gledhill, Igle
- Language: English
- Type: Article
- Identifier: vital:7323 , http://hdl.handle.net/10962/d1020572
- Description: Phthalocyanines are synthetic analogues of porphyrins employed as photosensitizers in cancer therapy. We present the history of photodynamic therapy and developments in the use of phthalocyanines as photosensitizers. New efforts in the development of more cancer-specific phthalocyanines are presented. The combination of phthalocyanines with nanoparticles for "combination therapy" of cancer is also discussed. The nanoparticles employed are quantum dots, gold, and magnetic nanoparticles. , Original publication is available at http://dx.doi.org/10.10631.4794220
- Full Text: false
The V-C's Awards
- Language: English
- Type: Article
- Identifier: vital:7170 , http://hdl.handle.net/10962/d1006074
- Description: Prof Tebello Nyokong, from the Department of Chemistry, receives the V-C' s Senior Distinguished Research Award in 2003 and 2004
- Full Text:
- Language: English
- Type: Article
- Identifier: vital:7170 , http://hdl.handle.net/10962/d1006074
- Description: Prof Tebello Nyokong, from the Department of Chemistry, receives the V-C' s Senior Distinguished Research Award in 2003 and 2004
- Full Text:
The veldt sound
- Authors: Chapman, Rod , Weaser, Garry
- Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group)
- Language: English
- Type: Article
- Identifier: vital:13512 , http://hdl.handle.net/10962/d1006089 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group)
- Description: Photocopied article from the English newspaper The Guardian about a European tour by Chris McGregor's Brotherhood of Breath. The tour starts with a concert at the Camden Jazz Festival. There is a photo of Chris McGregor playing the piano with this article.
- Full Text:
- Authors: Chapman, Rod , Weaser, Garry
- Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group)
- Language: English
- Type: Article
- Identifier: vital:13512 , http://hdl.handle.net/10962/d1006089 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group)
- Description: Photocopied article from the English newspaper The Guardian about a European tour by Chris McGregor's Brotherhood of Breath. The tour starts with a concert at the Camden Jazz Festival. There is a photo of Chris McGregor playing the piano with this article.
- Full Text:
The Water Sprite
- Authors: Tracey, Hugh
- Subjects: African story , Love story , Young man , Beautiful girl , Water Sprite , River
- Language: English
- Type: Sound , Story
- Identifier: vital:15471 , MOA35-01 , http://hdl.handle.net/10962/d1017829 , MOA35
- Description: Traditional African story of a young man who fell inlove with a beautiful girl not knowing she was a Water Sprite and lived in the river. , This recording is held at the International Library of African Music. For further information contact ilamlibrary@ru.ac.za , This recording was digitised by the International Library of African Music , Original format: 15ips reel , Equipment used in digitisation: Studer B 67 Tape Recorder; Nagra III , Software: Sound Forge V.6 , Sample rate: 44100Hz 16Bit Stereo
- Full Text: false
- Authors: Tracey, Hugh
- Subjects: African story , Love story , Young man , Beautiful girl , Water Sprite , River
- Language: English
- Type: Sound , Story
- Identifier: vital:15471 , MOA35-01 , http://hdl.handle.net/10962/d1017829 , MOA35
- Description: Traditional African story of a young man who fell inlove with a beautiful girl not knowing she was a Water Sprite and lived in the river. , This recording is held at the International Library of African Music. For further information contact ilamlibrary@ru.ac.za , This recording was digitised by the International Library of African Music , Original format: 15ips reel , Equipment used in digitisation: Studer B 67 Tape Recorder; Nagra III , Software: Sound Forge V.6 , Sample rate: 44100Hz 16Bit Stereo
- Full Text: false
The Woman and the Mouse
- Authors: Tracey, Hugh
- Subjects: African story , Woman , Pet mouse , housekeeping
- Language: English
- Type: Sound , Story
- Identifier: vital:15475 , MOA35-05 , http://hdl.handle.net/10962/d1017833 , MOA35
- Description: Traditional African story of the woman who kept a mouse as a pet and how he helped her to look after her house. , This recording is held at the International Library of African Music. For further information contact ilamlibrary@ru.ac.za , This recording was digitised by the International Library of African Music , Original format: 15ips reel , Equipment used in digitisation: Studer B 67 Tape Recorder; Nagra III , Software: Sound Forge V.6 , Sample rate: 44100Hz 16Bit Stereo
- Full Text: false
- Authors: Tracey, Hugh
- Subjects: African story , Woman , Pet mouse , housekeeping
- Language: English
- Type: Sound , Story
- Identifier: vital:15475 , MOA35-05 , http://hdl.handle.net/10962/d1017833 , MOA35
- Description: Traditional African story of the woman who kept a mouse as a pet and how he helped her to look after her house. , This recording is held at the International Library of African Music. For further information contact ilamlibrary@ru.ac.za , This recording was digitised by the International Library of African Music , Original format: 15ips reel , Equipment used in digitisation: Studer B 67 Tape Recorder; Nagra III , Software: Sound Forge V.6 , Sample rate: 44100Hz 16Bit Stereo
- Full Text: false
These we dig of yore
- Unknown
- Authors: Unknown
- Subjects: McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Blue Notes (Musical group : South Africa) , Pukwana, Dudu , Feza, Mongezi , Dyani, Johnny Mbizo , Moholo, Louis T.--1940-
- Language: English
- Type: Article
- Identifier: vital:13745 , http://hdl.handle.net/10962/d1012760
- Description: Short photocopied articles from The Wire Supplement on old musicians such as Chris McGregor and his Brotherhood of Breath, Kenny Wheeler, John Surman, etc.
- Full Text:
- Authors: Unknown
- Subjects: McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Blue Notes (Musical group : South Africa) , Pukwana, Dudu , Feza, Mongezi , Dyani, Johnny Mbizo , Moholo, Louis T.--1940-
- Language: English
- Type: Article
- Identifier: vital:13745 , http://hdl.handle.net/10962/d1012760
- Description: Short photocopied articles from The Wire Supplement on old musicians such as Chris McGregor and his Brotherhood of Breath, Kenny Wheeler, John Surman, etc.
- Full Text:
This is big - too good to miss
- Authors: Klaaste, Aggrey
- Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Language: English
- Type: Article
- Identifier: vital:13550 , http://hdl.handle.net/10962/d1006433 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Description: Photocopied article from the newspaper The Post about Chris McGregor leading his Big Band at a Jazz Festival in South Africa. A picture of Chris McGregor (right) and his band playing on stage is also accompanying this article.
- Full Text:
- Authors: Klaaste, Aggrey
- Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Language: English
- Type: Article
- Identifier: vital:13550 , http://hdl.handle.net/10962/d1006433 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians
- Description: Photocopied article from the newspaper The Post about Chris McGregor leading his Big Band at a Jazz Festival in South Africa. A picture of Chris McGregor (right) and his band playing on stage is also accompanying this article.
- Full Text:
Tina's lullaby: The man who turned into a hyena
- Authors: Tracey, Hugh
- Subjects: Karanga , Ngano , Rungano rgwe muno waikama maperi , Ndera , Concertina song , Singing , Dancing , Stamping , Poetry , Men , Women , Clapping performance , String instrument , Musical instrument , Khoikhoi music , South West Africa , African music , Story song
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15144 , http://hdl.handle.net/10962/d1012632 , Reel number: BC181
- Description: Selection of items possible for broadcast such as ‘Tina lullaby’, ‘The man who turned into a hyena’ and various songs from Africa to be broadcast by the South African Broadcasting Corporation , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
- Authors: Tracey, Hugh
- Subjects: Karanga , Ngano , Rungano rgwe muno waikama maperi , Ndera , Concertina song , Singing , Dancing , Stamping , Poetry , Men , Women , Clapping performance , String instrument , Musical instrument , Khoikhoi music , South West Africa , African music , Story song
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15144 , http://hdl.handle.net/10962/d1012632 , Reel number: BC181
- Description: Selection of items possible for broadcast such as ‘Tina lullaby’, ‘The man who turned into a hyena’ and various songs from Africa to be broadcast by the South African Broadcasting Corporation , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
Tina‘s lullaby
- Authors: Tracey, Hugh
- Subjects: Tina‘s African Lullaby , Slave , United States of America , South Carolina , Isebella Spencer , Augusta , Georgia , Lyrics , Lullaby , Pronounciation , Chimanyika , Southern Rhodesia , Zimbabwe , Mozambique , Carolina Coast , Zambezi Valley , Slave trade , Zanzibar Slave Market , Captain Blood , Briar Rabbit‘s Tales , Animal stories
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15107 , http://hdl.handle.net/10962/d1008535 , Reel number: BC170
- Description: Broadcast broadcasted by the South African Broadcasting Corporation regarding Tina‘s Lullaby - an African lullaby that had been handed down by succeeding generations of an American family originally learnt from their nanny Tina who was bought as a slave. The family approached Hugh Tracey to identify where in Africa it had originated. , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
- Authors: Tracey, Hugh
- Subjects: Tina‘s African Lullaby , Slave , United States of America , South Carolina , Isebella Spencer , Augusta , Georgia , Lyrics , Lullaby , Pronounciation , Chimanyika , Southern Rhodesia , Zimbabwe , Mozambique , Carolina Coast , Zambezi Valley , Slave trade , Zanzibar Slave Market , Captain Blood , Briar Rabbit‘s Tales , Animal stories
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15107 , http://hdl.handle.net/10962/d1008535 , Reel number: BC170
- Description: Broadcast broadcasted by the South African Broadcasting Corporation regarding Tina‘s Lullaby - an African lullaby that had been handed down by succeeding generations of an American family originally learnt from their nanny Tina who was bought as a slave. The family approached Hugh Tracey to identify where in Africa it had originated. , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
TLC Newsletter 1st Edition 2015
- Teaching and Learning Centre
- Authors: Teaching and Learning Centre
- Language: English
- Type: News bulletin
- Identifier: vital:12228 , http://hdl.handle.net/10353/d1018619
- Description: TEachng and Learning Centre Newsletter 1st Edition 2015
- Full Text:
- Authors: Teaching and Learning Centre
- Language: English
- Type: News bulletin
- Identifier: vital:12228 , http://hdl.handle.net/10353/d1018619
- Description: TEachng and Learning Centre Newsletter 1st Edition 2015
- Full Text:
Toast to honorary graduates 1979
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7398 , http://hdl.handle.net/10962/d1017287
- Full Text:
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7398 , http://hdl.handle.net/10962/d1017287
- Full Text:
Toast to honorary graduates at luncheon, Graduation 1978
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7366 , http://hdl.handle.net/10962/d1017246
- Full Text:
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7366 , http://hdl.handle.net/10962/d1017246
- Full Text:
Toast to honorary graduates at luncheon, graduation 1979
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7397 , http://hdl.handle.net/10962/d1017286
- Full Text:
- Authors: Henderson, Derek Scott
- Language: English
- Type: Text
- Identifier: vital:7397 , http://hdl.handle.net/10962/d1017286
- Full Text:
Tool wear monitoring in end milling of mould steel using acoustic emission
- Authors: Olufayo, Oluwole Ayodeji
- Subjects: Acoustic emission testing , Tool-steel
- Language: English
- Type: Thesis , Masters , MEngineering
- Identifier: vital:9651 , http://hdl.handle.net/10948/d1014688
- Description: Today’s production industry is faced with the challenge of maximising its resources and productivity. Tool condition monitoring (TCM) is an important diagnostic tool and if integrated in manufacturing, machining efficiency will increase as a result of reducing downtime resulting from tool failures by intensive wear. The research work presented in the study highlights the principles in tool condition monitoring and identifies acoustic emission (AE) as a reliable sensing technique for the detection of wear conditions. It reviews the importance of acoustic emission as an efficient technique and proposes a TCM model for the prediction of tool wear. The study presents a TCM framework to monitor an end-milling operation of H13 tool steel at different cutting speeds and feed rates. For this, three industrial acoustic sensors were positioned on the workpiece. The framework identifies a feature selection, extraction and conditioning process and classifies AE signals using an artificial neural network algorithm to create an autonomous system. It concludes by recognizing the mean and rms features as viable features in the identification of tool state and observes that chip coloration provides direct correlation to the temperature of machining as well as tool condition. This proposed model is aimed at creating a timing schedule for tool change in industries. This model ultimately links the rate of wear formation to characteristic AE features.
- Full Text:
- Authors: Olufayo, Oluwole Ayodeji
- Subjects: Acoustic emission testing , Tool-steel
- Language: English
- Type: Thesis , Masters , MEngineering
- Identifier: vital:9651 , http://hdl.handle.net/10948/d1014688
- Description: Today’s production industry is faced with the challenge of maximising its resources and productivity. Tool condition monitoring (TCM) is an important diagnostic tool and if integrated in manufacturing, machining efficiency will increase as a result of reducing downtime resulting from tool failures by intensive wear. The research work presented in the study highlights the principles in tool condition monitoring and identifies acoustic emission (AE) as a reliable sensing technique for the detection of wear conditions. It reviews the importance of acoustic emission as an efficient technique and proposes a TCM model for the prediction of tool wear. The study presents a TCM framework to monitor an end-milling operation of H13 tool steel at different cutting speeds and feed rates. For this, three industrial acoustic sensors were positioned on the workpiece. The framework identifies a feature selection, extraction and conditioning process and classifies AE signals using an artificial neural network algorithm to create an autonomous system. It concludes by recognizing the mean and rms features as viable features in the identification of tool state and observes that chip coloration provides direct correlation to the temperature of machining as well as tool condition. This proposed model is aimed at creating a timing schedule for tool change in industries. This model ultimately links the rate of wear formation to characteristic AE features.
- Full Text:
Top accolade for Rhodes scientist
- Mkentane, Luyolo, Holmes, Mike
- 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.
- Full Text:
- 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.
- Full Text:
Top jazz group visiting city
- Unknown
- Authors: Unknown
- Subjects: McGregor, Chris--1936-1990 , Blue Notes (Musical group : South Africa) , Moyake, Nikele , Jazz
- Language: English
- Type: Article
- Identifier: vital:13748 , http://hdl.handle.net/10962/d1012763
- Description: Photocopied article from the newspaper EP Herald Mail about Chris McGregor's Blue Notes coming to Port Elizabeth for a series of concerts. There is a picture of Nick Moyake playing Tenor saxophone with this article.
- Full Text:
- Authors: Unknown
- Subjects: McGregor, Chris--1936-1990 , Blue Notes (Musical group : South Africa) , Moyake, Nikele , Jazz
- Language: English
- Type: Article
- Identifier: vital:13748 , http://hdl.handle.net/10962/d1012763
- Description: Photocopied article from the newspaper EP Herald Mail about Chris McGregor's Blue Notes coming to Port Elizabeth for a series of concerts. There is a picture of Nick Moyake playing Tenor saxophone with this article.
- Full Text:
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:
Towards mineral beneficiation: from basic chemistry to applications
- Authors: Tshentu, Zenixole
- Subjects: Metallurgy , Ore-dressing , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/55783 , vital:53876
- Description: The role of mineral beneficiation in the survival, growth, development and sustainability of a developing economy cannot be overstated. Our development as a human species has always been involvedly linked with the use of mineral resources from the stone, bronze and iron ages through the early modern eras to the present. In the current modern era, characterized by highly technological equipment, fourth industrial revolution (4IR) and new energy technologies, the role of mineral beneficiation has been elevated. Precious metals find use in the fine chemicals and petrochemicals industry, fuel cells, electrical and electronic products, medical and dentistry applications, jewellery, autocatalysts, and glass and ceramics. The markets for precious metals keep growing and the supply does not meet demand. The development of methods for recovery of metal value from feeds of mineral ore solutions, solutions of spent secondary resources and from mining wastewaters remains of great importance. Further beneficiation strategies for utilization of mineral products in other “value-added” applications are also important for the growth of the mineral markets. The usage of platinum, palladium and rhodium in the autocatalyst industry has grown significantly and this has further elevated the importance of platinum group metals (PGMs), but other areas of application of the strategic metals need to be harnessed. The four stages of beneficiation, namely, primary, secondary, tertiary and final stage, provide an opportunity to beneficiate to greater value for domestic or export use. Our own research work is engaged in several of these stages, from hydrometallurgical recovery of base metals and platinum group metals from feeds of primary mining and solutions of waste secondary resources such as spent catalytic converters and e-waste to the use of metals in “value added” products such as metalbased catalysts for the fuel industry and in metallodrugs. Examples of “value added” products include rhodium as a promoter in molybdenum sulfide as a catalyst for hydrodesulfurization of fuel oil, vanadium as a catalyst in oxidative desulfurization of fuel oil, vanadium and palladium as therapeutic agents for diabetes and cancer, respectively. Current and future work involves (i) the development of metal-selective scavengers to recover lost metal value in mining wastewaters, and (ii) the design of metal-based catalytic materials for refinement of bio-based oils to biofuel as well as for production of green LPG through hydroprocessing. Our work centres around both basic and applied chemistry towards mineral beneficiation and with a bias towards greener production.
- Full Text:
- Authors: Tshentu, Zenixole
- Subjects: Metallurgy , Ore-dressing , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/55783 , vital:53876
- Description: The role of mineral beneficiation in the survival, growth, development and sustainability of a developing economy cannot be overstated. Our development as a human species has always been involvedly linked with the use of mineral resources from the stone, bronze and iron ages through the early modern eras to the present. In the current modern era, characterized by highly technological equipment, fourth industrial revolution (4IR) and new energy technologies, the role of mineral beneficiation has been elevated. Precious metals find use in the fine chemicals and petrochemicals industry, fuel cells, electrical and electronic products, medical and dentistry applications, jewellery, autocatalysts, and glass and ceramics. The markets for precious metals keep growing and the supply does not meet demand. The development of methods for recovery of metal value from feeds of mineral ore solutions, solutions of spent secondary resources and from mining wastewaters remains of great importance. Further beneficiation strategies for utilization of mineral products in other “value-added” applications are also important for the growth of the mineral markets. The usage of platinum, palladium and rhodium in the autocatalyst industry has grown significantly and this has further elevated the importance of platinum group metals (PGMs), but other areas of application of the strategic metals need to be harnessed. The four stages of beneficiation, namely, primary, secondary, tertiary and final stage, provide an opportunity to beneficiate to greater value for domestic or export use. Our own research work is engaged in several of these stages, from hydrometallurgical recovery of base metals and platinum group metals from feeds of primary mining and solutions of waste secondary resources such as spent catalytic converters and e-waste to the use of metals in “value added” products such as metalbased catalysts for the fuel industry and in metallodrugs. Examples of “value added” products include rhodium as a promoter in molybdenum sulfide as a catalyst for hydrodesulfurization of fuel oil, vanadium as a catalyst in oxidative desulfurization of fuel oil, vanadium and palladium as therapeutic agents for diabetes and cancer, respectively. Current and future work involves (i) the development of metal-selective scavengers to recover lost metal value in mining wastewaters, and (ii) the design of metal-based catalytic materials for refinement of bio-based oils to biofuel as well as for production of green LPG through hydroprocessing. Our work centres around both basic and applied chemistry towards mineral beneficiation and with a bias towards greener production.
- 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 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: