Eric Nomvete
- Authors: Nomvete, Eric
- Date: 19--?
- Subjects: uncatalogued
- Type: Image
- Identifier: http://hdl.handle.net/10962/126813 , vital:35925 , RHPC-094
- Description: Eric Nomvete. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 19--?
- Authors: Nomvete, Eric
- Date: 19--?
- Subjects: uncatalogued
- Type: Image
- Identifier: http://hdl.handle.net/10962/126813 , vital:35925 , RHPC-094
- Description: Eric Nomvete. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 19--?
Lundi (surname unidentified) and Eric Majola
- Authors: Lundi , Majola, Eric
- Date: 19--?
- Subjects: uncatalogued
- Type: Image
- Identifier: http://hdl.handle.net/10962/126295 , vital:35872 , RHPC-034
- Description: Lundi, guitarist for Afri Rhythm Crotchets and Eric Majola, Springbok rugby player. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 19--?
- Authors: Lundi , Majola, Eric
- Date: 19--?
- Subjects: uncatalogued
- Type: Image
- Identifier: http://hdl.handle.net/10962/126295 , vital:35872 , RHPC-034
- Description: Lundi, guitarist for Afri Rhythm Crotchets and Eric Majola, Springbok rugby player. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 19--?
Nani Bwabongo
- Priscilia Ngando (lead vocal), Mevio-Mayo, Dany Mouanga, Mouasso (rhythm guitars), Aubin Sandjo, Scorpionkabambay, Mouche Bass (bass guitar), Dany Mouanga, Eric Sefu (solo guitar), Aubin Sandjo, Paul Balong (keyboard), Abel Massock, Fabo Claude, Nono (chorus), Cyrille Baudoin Koudh (composer), Aubin Sandjo (drum, percussion, keyboard), Alhadji Mallam Issa (talking drum), Moussa Haissam
- Authors: Priscilia Ngando (lead vocal) , Mevio-Mayo, Dany Mouanga, Mouasso (rhythm guitars) , Aubin Sandjo, Scorpionkabambay, Mouche Bass (bass guitar) , Dany Mouanga, Eric Sefu (solo guitar) , Aubin Sandjo, Paul Balong (keyboard) , Abel Massock, Fabo Claude, Nono (chorus) , Cyrille Baudoin Koudh (composer) , Aubin Sandjo (drum, percussion, keyboard) , Alhadji Mallam Issa (talking drum) , Moussa Haissam
- Date: 2000
- Subjects: Popular music , Popular music--Africa, West , Africa Cameroon Yaounde f-cm
- Language: French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/130792 , vital:36479 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC47-02
- Description: Popular songs from Cameroon, featuring female vocal accompanied by keyboard, chorus, guitar, percussion and talking drum, playing West and Central African rhythms
- Full Text: false
- Date Issued: 2000
- Authors: Priscilia Ngando (lead vocal) , Mevio-Mayo, Dany Mouanga, Mouasso (rhythm guitars) , Aubin Sandjo, Scorpionkabambay, Mouche Bass (bass guitar) , Dany Mouanga, Eric Sefu (solo guitar) , Aubin Sandjo, Paul Balong (keyboard) , Abel Massock, Fabo Claude, Nono (chorus) , Cyrille Baudoin Koudh (composer) , Aubin Sandjo (drum, percussion, keyboard) , Alhadji Mallam Issa (talking drum) , Moussa Haissam
- Date: 2000
- Subjects: Popular music , Popular music--Africa, West , Africa Cameroon Yaounde f-cm
- Language: French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/130792 , vital:36479 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC47-02
- Description: Popular songs from Cameroon, featuring female vocal accompanied by keyboard, chorus, guitar, percussion and talking drum, playing West and Central African rhythms
- Full Text: false
- Date Issued: 2000
Dikalo
- Priscilia Ngando (lead vocal), Mevio-Mayo, Dany Mouanga, Mouasso (rhythm guitars), Aubin Sandjo, Scorpionkabambay, Mouche Bass (bass guitar), Dany Mouanga, Eric Sefu (solo guitar), Aubin Sandjo, Paul Balong (keyboard), Abel Massock, Fabo Claude, Nono (chorus), Priscilia Ngando (composer), Aubin Sandjo (drum, percussion, keyboard), Alhadji Mallam Issa (talking drum), Moussa Haissam
- Authors: Priscilia Ngando (lead vocal) , Mevio-Mayo, Dany Mouanga, Mouasso (rhythm guitars) , Aubin Sandjo, Scorpionkabambay, Mouche Bass (bass guitar) , Dany Mouanga, Eric Sefu (solo guitar) , Aubin Sandjo, Paul Balong (keyboard) , Abel Massock, Fabo Claude, Nono (chorus) , Priscilia Ngando (composer) , Aubin Sandjo (drum, percussion, keyboard) , Alhadji Mallam Issa (talking drum) , Moussa Haissam
- Date: 2000
- Subjects: Popular music , Popular music--Africa, West , Africa Cameroon Yaounde f-cm
- Language: French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/130836 , vital:36486 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC47-03
- Description: Popular songs from Cameroon, featuring female vocal accompanied by keyboard, chorus, guitar, percussion and talking drum, playing West and Central African rhythms
- Full Text: false
- Date Issued: 2000
- Authors: Priscilia Ngando (lead vocal) , Mevio-Mayo, Dany Mouanga, Mouasso (rhythm guitars) , Aubin Sandjo, Scorpionkabambay, Mouche Bass (bass guitar) , Dany Mouanga, Eric Sefu (solo guitar) , Aubin Sandjo, Paul Balong (keyboard) , Abel Massock, Fabo Claude, Nono (chorus) , Priscilia Ngando (composer) , Aubin Sandjo (drum, percussion, keyboard) , Alhadji Mallam Issa (talking drum) , Moussa Haissam
- Date: 2000
- Subjects: Popular music , Popular music--Africa, West , Africa Cameroon Yaounde f-cm
- Language: French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/130836 , vital:36486 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC47-03
- Description: Popular songs from Cameroon, featuring female vocal accompanied by keyboard, chorus, guitar, percussion and talking drum, playing West and Central African rhythms
- Full Text: false
- Date Issued: 2000
Dr Eric with Church Moderator Mr Gwali
- Dr Eric and Mr William Gwali
- Authors: Dr Eric and Mr William Gwali
- Date: 2016
- Subjects: UNCATALOGUED
- Type: Image
- Identifier: http://hdl.handle.net/10962/220175 , vital:48599 , KHP-200
- Description: After Church Service Interview of Church Commitee , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/) (NEVER CAHNGE THIS FIELD)
- Full Text: false
- Date Issued: 2016
- Authors: Dr Eric and Mr William Gwali
- Date: 2016
- Subjects: UNCATALOGUED
- Type: Image
- Identifier: http://hdl.handle.net/10962/220175 , vital:48599 , KHP-200
- Description: After Church Service Interview of Church Commitee , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/) (NEVER CAHNGE THIS FIELD)
- Full Text: false
- Date Issued: 2016
On the study of the performance of Photovoltaic power plants
- Authors: Serameng, Tshepo Joba
- Date: 2019
- Subjects: Photovoltaic power generation , Solar energy Power resources Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/43401 , vital:36873
- Description: Performance monitoring of different module technologies and system configurations of photovoltaic (PV) systems in South Africa is rare, resulting in-few reports being published based on field results of PV systems installed and operated in South Africa. The goal of this work was to analyse and report on the performance of PV systems by evaluating the energy output of various PV system configurations and module technologies in the central part of South African (southern hemisphere) climatic conditions. To achieve this, a 400 kWp PV Solar plant has been installed and monitored since January 2015 at the Eskom Research and Innovation Centre (ERIC) in Rosherville, Gauteng (26°5'5" South, 28°5 8'1" East and 1625 m above mean sea level). The ERIC plant consists of multi-crystalline silicon (mc-Si) and copper indium gallium selenide (CIGS) thin-film technologies. The plant comprises of two 25° fixed-tilt north facing arrays, two east-west single axis tracking arrays and two 10° fixed shed orientation (East and West) for both module technologies and one north-south single axis tracking for mc-Si. The evaluation was achieved by studying the operation of the PV plant under different weather conditions and the impact of different configurations and technologies by analysing mainly in terms of specific yields normalized per m2 (kWh/kWp/m2). The first part of the study investigates the impact on the overall performance of different PV technologies as a function of the module mounting configuration. The second part presents the PVSyst yield validation for the Eskom Research and Innovation Centre (ERIC) solar PV plant. Normalised yield production calculations were performed for a fair comparison of various configurations. Although CIGS technology has a higher specific yield throughout the year, the normalised yield production per m2 shows that mc-Si technology out-performs CIGS in both fixed north facing and east-west tracking configurations. This study provides an insight to identify the optimal configuration and will also give an indication of suitability of PV technology for deployment in the central part of South Africa, once all design parameters are considered. This information is also useful in evaluating the operational benefits of the plant based on the net energy output. The monitored data and operating experience of the reported PV system can be applied for future projects. It is common at the beginning of any project for photovoltaic (PV) simulation tools to be utilized for yield prediction in order to estimate performance that can be expected. The purpose for PVSyst yield validation in this study was to validate the accuracy of the original PVSyst simulation that were performed using the satellite derived data, PVGIS satellite database for the ERIC PV plant. The validation is done using the actual ground measured solar resource datasets on site by importing them into PVSyst. A brief analysis of the results suggests that the PVSyst model seems to overestimate the yield output relative to the measured values. This due to out-door conditions and environmental factors impacting the PV site. These factors include power outages, module degradation and were unknown during the development phases when original simulations were performed. However, based on the statistical criteria and assessment, it can be concluded that the original PVSyst simulation results are accurate enough as per the MBE and RMSE percentages, however it is noted as well that the modified PVSyst results are more correlated to the measured results in comparison.
- Full Text:
- Date Issued: 2019
- Authors: Serameng, Tshepo Joba
- Date: 2019
- Subjects: Photovoltaic power generation , Solar energy Power resources Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/43401 , vital:36873
- Description: Performance monitoring of different module technologies and system configurations of photovoltaic (PV) systems in South Africa is rare, resulting in-few reports being published based on field results of PV systems installed and operated in South Africa. The goal of this work was to analyse and report on the performance of PV systems by evaluating the energy output of various PV system configurations and module technologies in the central part of South African (southern hemisphere) climatic conditions. To achieve this, a 400 kWp PV Solar plant has been installed and monitored since January 2015 at the Eskom Research and Innovation Centre (ERIC) in Rosherville, Gauteng (26°5'5" South, 28°5 8'1" East and 1625 m above mean sea level). The ERIC plant consists of multi-crystalline silicon (mc-Si) and copper indium gallium selenide (CIGS) thin-film technologies. The plant comprises of two 25° fixed-tilt north facing arrays, two east-west single axis tracking arrays and two 10° fixed shed orientation (East and West) for both module technologies and one north-south single axis tracking for mc-Si. The evaluation was achieved by studying the operation of the PV plant under different weather conditions and the impact of different configurations and technologies by analysing mainly in terms of specific yields normalized per m2 (kWh/kWp/m2). The first part of the study investigates the impact on the overall performance of different PV technologies as a function of the module mounting configuration. The second part presents the PVSyst yield validation for the Eskom Research and Innovation Centre (ERIC) solar PV plant. Normalised yield production calculations were performed for a fair comparison of various configurations. Although CIGS technology has a higher specific yield throughout the year, the normalised yield production per m2 shows that mc-Si technology out-performs CIGS in both fixed north facing and east-west tracking configurations. This study provides an insight to identify the optimal configuration and will also give an indication of suitability of PV technology for deployment in the central part of South Africa, once all design parameters are considered. This information is also useful in evaluating the operational benefits of the plant based on the net energy output. The monitored data and operating experience of the reported PV system can be applied for future projects. It is common at the beginning of any project for photovoltaic (PV) simulation tools to be utilized for yield prediction in order to estimate performance that can be expected. The purpose for PVSyst yield validation in this study was to validate the accuracy of the original PVSyst simulation that were performed using the satellite derived data, PVGIS satellite database for the ERIC PV plant. The validation is done using the actual ground measured solar resource datasets on site by importing them into PVSyst. A brief analysis of the results suggests that the PVSyst model seems to overestimate the yield output relative to the measured values. This due to out-door conditions and environmental factors impacting the PV site. These factors include power outages, module degradation and were unknown during the development phases when original simulations were performed. However, based on the statistical criteria and assessment, it can be concluded that the original PVSyst simulation results are accurate enough as per the MBE and RMSE percentages, however it is noted as well that the modified PVSyst results are more correlated to the measured results in comparison.
- Full Text:
- Date Issued: 2019
The uses of transactional analysis in theatre practice : inaugural lecture delivered at Rhodes University
- Authors: James, Sydney
- Date: 1990
- Subjects: Transactional analysis , Theater -- Production and direction , Theater -- Psychological aspects
- Language: English
- Type: Text
- Identifier: vital:642 , http://hdl.handle.net/10962/d1020711 , ISBN 0868102067
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1990
- Authors: James, Sydney
- Date: 1990
- Subjects: Transactional analysis , Theater -- Production and direction , Theater -- Psychological aspects
- Language: English
- Type: Text
- Identifier: vital:642 , http://hdl.handle.net/10962/d1020711 , ISBN 0868102067
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1990
An exploration of the psychological significance of soap opera viewing
- Authors: Moodley, Prevan
- Date: 1998
- Subjects: Television -- Psychological aspects , Television soap operas -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3023 , http://hdl.handle.net/10962/d1002532 , Television -- Psychological aspects , Television soap operas -- Psychological aspects
- Description: In traditional research approaches, soap opera viewing has been studied quantitatively. Such studies ignore the subjectivities, the sociocultural contexts, and life contexts of individual viewers. To account for such shortcomings and to offer a qualitative research approach, an investigation was conducted into the engagement that viewers have with a particular soap opera, The bold and the beautiful. The collective case study research method was used. Three subjects were interviewed using in-depth phenomenological interviewing and the data obtained was subjected to.a hermeneutic method of investigation. This involved using a reading guide that extracted firstly, how pleasure is experienced in soap opera viewing, and secondly how the viewers' interpretations of the soap opera are linked to their everyday life contexts. Pleasure was found to be related to experiencing the soap opera world as real, the social context of the viewer, the openness of the text, selecting textual elements, identification and opening up the viewer's world. The viewers' interpretations were related to their life contexts in terms of the meanings that were constructed around emotions, identities, interpersonal relations and a cultural interface. Most notable for the South African context, is that viewing The bold and the beautiful provides a cultural interface because African identities are brought to this practice.
- Full Text:
- Date Issued: 1998
- Authors: Moodley, Prevan
- Date: 1998
- Subjects: Television -- Psychological aspects , Television soap operas -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3023 , http://hdl.handle.net/10962/d1002532 , Television -- Psychological aspects , Television soap operas -- Psychological aspects
- Description: In traditional research approaches, soap opera viewing has been studied quantitatively. Such studies ignore the subjectivities, the sociocultural contexts, and life contexts of individual viewers. To account for such shortcomings and to offer a qualitative research approach, an investigation was conducted into the engagement that viewers have with a particular soap opera, The bold and the beautiful. The collective case study research method was used. Three subjects were interviewed using in-depth phenomenological interviewing and the data obtained was subjected to.a hermeneutic method of investigation. This involved using a reading guide that extracted firstly, how pleasure is experienced in soap opera viewing, and secondly how the viewers' interpretations of the soap opera are linked to their everyday life contexts. Pleasure was found to be related to experiencing the soap opera world as real, the social context of the viewer, the openness of the text, selecting textual elements, identification and opening up the viewer's world. The viewers' interpretations were related to their life contexts in terms of the meanings that were constructed around emotions, identities, interpersonal relations and a cultural interface. Most notable for the South African context, is that viewing The bold and the beautiful provides a cultural interface because African identities are brought to this practice.
- Full Text:
- Date Issued: 1998
From Pringles of the Valleys
- Pringle, Eric, 1907-, Pringle, Mark Elliot, 1880-, Pringle, John Adams, 1910-
- Authors: Pringle, Eric, 1907- , Pringle, Mark Elliot, 1880- , Pringle, John Adams, 1910-
- Date: 1957
- Subjects: Acacia karroo -- South Africa , Trees -- South Africa
- Language: English
- Type: mixed material , essay
- Identifier: http://hdl.handle.net/10962/109198 , vital:33084
- Description: Transcript: "from PRINGLES OF THE VALLEYS ,1957, by Eric, Mark and John Pringle. p.29. (On the farm now known as Clifton). "The next day, July 2nd (1820) was our first Sunday on our own grounds. Feeling deeply the importance of maintaining the suitable observance of this day of sacred rest, it was unanimously resolved that we should strictly abstain from an secular employment not sanctioned by absolute necessity; and at the same time commence such a system of religious services as might be with propriety maintained in the absence of a clergyman or minister. The whole party were accordingly assembled after breakfast under a venerable acacia tree, on the margin of a little stream which murmured around our camp. It was, indeed, an affecting sight to look round on our little band of Scottish emigrants, thus congregated for the first time to worship God in the wild glen allotted for their future home and the heritage of their offspring". An inspection in 1956 established this spot with some certainty is just south of the present Craig Rennie homestead".
- Full Text:
- Date Issued: 1957
- Authors: Pringle, Eric, 1907- , Pringle, Mark Elliot, 1880- , Pringle, John Adams, 1910-
- Date: 1957
- Subjects: Acacia karroo -- South Africa , Trees -- South Africa
- Language: English
- Type: mixed material , essay
- Identifier: http://hdl.handle.net/10962/109198 , vital:33084
- Description: Transcript: "from PRINGLES OF THE VALLEYS ,1957, by Eric, Mark and John Pringle. p.29. (On the farm now known as Clifton). "The next day, July 2nd (1820) was our first Sunday on our own grounds. Feeling deeply the importance of maintaining the suitable observance of this day of sacred rest, it was unanimously resolved that we should strictly abstain from an secular employment not sanctioned by absolute necessity; and at the same time commence such a system of religious services as might be with propriety maintained in the absence of a clergyman or minister. The whole party were accordingly assembled after breakfast under a venerable acacia tree, on the margin of a little stream which murmured around our camp. It was, indeed, an affecting sight to look round on our little band of Scottish emigrants, thus congregated for the first time to worship God in the wild glen allotted for their future home and the heritage of their offspring". An inspection in 1956 established this spot with some certainty is just south of the present Craig Rennie homestead".
- Full Text:
- Date Issued: 1957
Bells and bell ringers in South Africa, 1835-2000. Part I
- Authors: Lewis, Colin A
- Date: 2001
- Language: English
- Type: Article
- Identifier: vital:6164 , http://hdl.handle.net/10962/d1012352 , http://www.ringingworld.co.uk/
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa. , The first ring of bells in Africa was installed in Grahamstown Cathedral in 1879 at the instigation of Frederick Henry Williams. Williams was Dean of Grahamstown from 1865 until his death in 1885. He was born in County Fermanagh, Ireland, not far from Enniskillen, where an octave was installed in the Cathedral when Williams was an impressionable 12-year old. Grahamstown's bells were also an octave, cast by John Warner and Sons of London. They were hung in the newly built tower, designed by the English architect, George Gilbert Scott.
- Full Text:
- Date Issued: 2001
- Authors: Lewis, Colin A
- Date: 2001
- Language: English
- Type: Article
- Identifier: vital:6164 , http://hdl.handle.net/10962/d1012352 , http://www.ringingworld.co.uk/
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa. , The first ring of bells in Africa was installed in Grahamstown Cathedral in 1879 at the instigation of Frederick Henry Williams. Williams was Dean of Grahamstown from 1865 until his death in 1885. He was born in County Fermanagh, Ireland, not far from Enniskillen, where an octave was installed in the Cathedral when Williams was an impressionable 12-year old. Grahamstown's bells were also an octave, cast by John Warner and Sons of London. They were hung in the newly built tower, designed by the English architect, George Gilbert Scott.
- Full Text:
- Date Issued: 2001
CdTe quantum dots functionalized with 4-amino-2, 2, 6, 6-tetramethylpiperidine-N-oxide as luminescent nanoprobe for the sensitive recognition of bromide ion
- Adegoke, Oluwasesan, Hosten, Eric, McCleland, Cedric, Nyokong, Tebello
- Authors: Adegoke, Oluwasesan , Hosten, Eric , McCleland, Cedric , Nyokong, Tebello
- Date: 2012
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/244393 , vital:51253 , xlink:href="https://doi.org/10.1016/j.aca.2012.01.040"
- Description: A novel bromide ion-selective modified nanoprobe sensor based on 4-amino-2,2,6,6-tetramethylpiperidine-N-oxide (4AT)-functionalized CdTe quantum dots (QDs-4AT) has been developed. Fluorescence quenching of the QDs by 4AT was observed. The functionalized QDs-4AT nanoprobe allowed a highly sensitive determination of bromide ion via analyte-induced change in the photoluminescence (fluorescence recovery) of the modified QDs. A detection limit of 0.6 nM of bromide ion was obtained, while the interfering effect of other inorganic cations and anions was investigated to examine the selectivity of the nanoprobe. The linear range was between 0.01 and 0.13 μM. Combined fluorescence lifetime and electron paramagnetic resonance measurements confirmed electron transfer processes between bromide ion and QDs-4AT.
- Full Text:
- Date Issued: 2012
- Authors: Adegoke, Oluwasesan , Hosten, Eric , McCleland, Cedric , Nyokong, Tebello
- Date: 2012
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/244393 , vital:51253 , xlink:href="https://doi.org/10.1016/j.aca.2012.01.040"
- Description: A novel bromide ion-selective modified nanoprobe sensor based on 4-amino-2,2,6,6-tetramethylpiperidine-N-oxide (4AT)-functionalized CdTe quantum dots (QDs-4AT) has been developed. Fluorescence quenching of the QDs by 4AT was observed. The functionalized QDs-4AT nanoprobe allowed a highly sensitive determination of bromide ion via analyte-induced change in the photoluminescence (fluorescence recovery) of the modified QDs. A detection limit of 0.6 nM of bromide ion was obtained, while the interfering effect of other inorganic cations and anions was investigated to examine the selectivity of the nanoprobe. The linear range was between 0.01 and 0.13 μM. Combined fluorescence lifetime and electron paramagnetic resonance measurements confirmed electron transfer processes between bromide ion and QDs-4AT.
- Full Text:
- Date Issued: 2012
Oxovanadium (IV)-containing poly (styrene-co-4′-ethenyl-2-hydroxyphenylimidazole) electrospun nanofibers for the catalytic oxidation of thioanisole
- Walmsley, Ryan S, Litwinski, Christian, Antunes, Edith M, Hlangothi, Percy, Hosten, Eric, McCleland, Cedric, Nyokong, Tebello, Torto, Nelson, Tshentu, Zenixole R
- Authors: Walmsley, Ryan S , Litwinski, Christian , Antunes, Edith M , Hlangothi, Percy , Hosten, Eric , McCleland, Cedric , Nyokong, Tebello , Torto, Nelson , Tshentu, Zenixole R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241665 , vital:50959 , xlink:href="https://doi.org/10.1016/j.molcata.2013.07.018"
- Description: The catalytic fibers have been fabricated by the electrospinning of a copolymer of styrene and 2-(2′-hydroxy-4′-ethenylphenyl)imidazole {p(ST-co-VPIM)} followed by a reaction with a methanolic vanadyl solution to afford the oxovanadium(IV)-containing poly(styrene-co-4′-ethenyl-2-hydroxyphenylimidazole) fibers {p(ST-co-VPIM)-VO fibers}. The relationship between polymer concentration and fiber diameter was investigated, and at high concentration (20 wt%) the fibers were quite large (average diameter of 3.8 μm) but as the concentration was reduced fibers of much lower diameter were produced (0.6 μm using 8 wt%). The BET surface area for p(ST-co-VPIM) fibers (0.6 μm diameter) was 47.9 m2 g−1 and functionalization of p(ST-co-VPIM) with vanadyl resulted in an increase in surface area to 60.7 m2 g−1 for p(ST-co-VPIM)-VO. The presence of vanadyl was confirmed by XPS and EPR. The EPR spectral analyses depicted complex speciation of vanadium within these polymer supports. These catalytic fibers were applied under batch and continuous flow conditions for the catalytic oxidation of thioanisole using hydrogen peroxide. The continuous flow method gave excellent and constant conversion throughout the 10 h period studied. The leaching of vanadium from the fiber support was 4% over the 10 h period indicating a significant stability of the material.
- Full Text:
- Date Issued: 2013
- Authors: Walmsley, Ryan S , Litwinski, Christian , Antunes, Edith M , Hlangothi, Percy , Hosten, Eric , McCleland, Cedric , Nyokong, Tebello , Torto, Nelson , Tshentu, Zenixole R
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241665 , vital:50959 , xlink:href="https://doi.org/10.1016/j.molcata.2013.07.018"
- Description: The catalytic fibers have been fabricated by the electrospinning of a copolymer of styrene and 2-(2′-hydroxy-4′-ethenylphenyl)imidazole {p(ST-co-VPIM)} followed by a reaction with a methanolic vanadyl solution to afford the oxovanadium(IV)-containing poly(styrene-co-4′-ethenyl-2-hydroxyphenylimidazole) fibers {p(ST-co-VPIM)-VO fibers}. The relationship between polymer concentration and fiber diameter was investigated, and at high concentration (20 wt%) the fibers were quite large (average diameter of 3.8 μm) but as the concentration was reduced fibers of much lower diameter were produced (0.6 μm using 8 wt%). The BET surface area for p(ST-co-VPIM) fibers (0.6 μm diameter) was 47.9 m2 g−1 and functionalization of p(ST-co-VPIM) with vanadyl resulted in an increase in surface area to 60.7 m2 g−1 for p(ST-co-VPIM)-VO. The presence of vanadyl was confirmed by XPS and EPR. The EPR spectral analyses depicted complex speciation of vanadium within these polymer supports. These catalytic fibers were applied under batch and continuous flow conditions for the catalytic oxidation of thioanisole using hydrogen peroxide. The continuous flow method gave excellent and constant conversion throughout the 10 h period studied. The leaching of vanadium from the fiber support was 4% over the 10 h period indicating a significant stability of the material.
- Full Text:
- Date Issued: 2013
Sensitivity of different areas of the flexor aspect of the human forearm to corticosteroid-induced skin blanching
- Meyer, Eric, Smith, Eric W, Haigh, John M
- Authors: Meyer, Eric , Smith, Eric W , Haigh, John M
- Date: 1992
- Language: English
- Type: Article
- Identifier: vital:6394 , http://hdl.handle.net/10962/d1006317
- Description: The intensity of corticosteroid-induced blanching has been found to vary at different areas of the flexor aspect of the human forearm. A retrospective analysis of 38,880 observations of skin blanching in 56 volunteers was conducted to assess the sensitivity of forearm skin to betamethasone 17-valerate. The mid-forearm appears to be more sensitive to the blanching response than do the areas close to the wrist or elbow. These results indicate that each preparation under evaluation should be applied to several sites along the forearm when using the human skin blanching assay in order to obtain an accurate comparative assessment of corticosteroid release from topical delivery vehicles.
- Full Text: false
- Date Issued: 1992
- Authors: Meyer, Eric , Smith, Eric W , Haigh, John M
- Date: 1992
- Language: English
- Type: Article
- Identifier: vital:6394 , http://hdl.handle.net/10962/d1006317
- Description: The intensity of corticosteroid-induced blanching has been found to vary at different areas of the flexor aspect of the human forearm. A retrospective analysis of 38,880 observations of skin blanching in 56 volunteers was conducted to assess the sensitivity of forearm skin to betamethasone 17-valerate. The mid-forearm appears to be more sensitive to the blanching response than do the areas close to the wrist or elbow. These results indicate that each preparation under evaluation should be applied to several sites along the forearm when using the human skin blanching assay in order to obtain an accurate comparative assessment of corticosteroid release from topical delivery vehicles.
- Full Text: false
- Date Issued: 1992
South African supratidal microbialites: prokaryote communities, metabolic capabilities, and biogeochemical processes
- Authors: Isemonger, Eric William
- Date: 2023-03-31
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/422641 , vital:71964
- Description: Access restricted. Embargoed until 2025. , Thesis (PhD) -- Faculty of Science, Biochemistry and Microbiology, 2023
- Full Text:
- Date Issued: 2023-03-31
- Authors: Isemonger, Eric William
- Date: 2023-03-31
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/422641 , vital:71964
- Description: Access restricted. Embargoed until 2025. , Thesis (PhD) -- Faculty of Science, Biochemistry and Microbiology, 2023
- Full Text:
- Date Issued: 2023-03-31
Nancy Jazz Pulsations
- Unknown
- Authors: Unknown
- Subjects: McGregor, Chris -- 1936-1990 , Brotherhood of Breath (Musical group) , Jazz
- Language: French
- Type: Text
- Identifier: vital:13784 , http://hdl.handle.net/10962/d1012816
- Description: Original flier for the 10th Nancy Jazz Pulsations festival (France).
- Full Text:
- Authors: Unknown
- Subjects: McGregor, Chris -- 1936-1990 , Brotherhood of Breath (Musical group) , Jazz
- Language: French
- Type: Text
- Identifier: vital:13784 , http://hdl.handle.net/10962/d1012816
- Description: Original flier for the 10th Nancy Jazz Pulsations festival (France).
- Full Text:
Article
- Authors: Bernard L. Ngota
- Date: 2019
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/11260/3765 , vital:43944
- Full Text:
- Authors: Bernard L. Ngota
- Date: 2019
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/11260/3765 , vital:43944
- Full Text:
African Immigrant Entrepreneurs in South Africa: Exploring Their Economic Contributions
- Bernard Lama Ngota, Sookdhev Rajkaran
- Authors: Bernard Lama Ngota , Sookdhev Rajkaran
- Date: 2019
- Language: English
- Identifier: http://hdl.handle.net/11260/1846 , vital:38835 , African immigrant entrepreneurs; entrepreneurial challenges; Small and Medium Enterprises; South Africa
- Full Text:
- Authors: Bernard Lama Ngota , Sookdhev Rajkaran
- Date: 2019
- Language: English
- Identifier: http://hdl.handle.net/11260/1846 , vital:38835 , African immigrant entrepreneurs; entrepreneurial challenges; Small and Medium Enterprises; South Africa
- Full Text:
In vitro release of propranolol hydrochloride from topical vehicles
- Smith, Eric W, Haigh, John M
- Authors: Smith, Eric W , Haigh, John M
- Date: 1994
- Language: English
- Type: text , Article
- Identifier: vital:6435 , http://hdl.handle.net/10962/d1006612
- Description: Transdermal drug delivery is becoming increasingly important and for this reason it is clear that academia must ensure that current graduates are knowledgeable in all facets of topical drug administration. An in vitro diffusion cell experiment was designed to demonstrate the rate of release of propranolol hydrochloride (PHC) from three different topical vehicles: (i) an oil-in-water cream; (ii) a gel; and (iii) anointment. This experiment was performed by final-year students enroled in an undergraduate course on percutaneous absorption. In vitro release of PHC from the three bases to an aqueous receptor phase through silicone membrane was monitored spectrophotometrically at a wavelength of 290 nm. By monitoring and attempting to explain the numerous possible reasons for the different rates of drug release from the three vehicles, it was hoped that the students would gain a better understanding of the complexities of transdermal drug administration. Overall, the experiment would appear to be a good model for student investigation into factors affecting the release of drugs from topical formulations.
- Full Text:
- Date Issued: 1994
- Authors: Smith, Eric W , Haigh, John M
- Date: 1994
- Language: English
- Type: text , Article
- Identifier: vital:6435 , http://hdl.handle.net/10962/d1006612
- Description: Transdermal drug delivery is becoming increasingly important and for this reason it is clear that academia must ensure that current graduates are knowledgeable in all facets of topical drug administration. An in vitro diffusion cell experiment was designed to demonstrate the rate of release of propranolol hydrochloride (PHC) from three different topical vehicles: (i) an oil-in-water cream; (ii) a gel; and (iii) anointment. This experiment was performed by final-year students enroled in an undergraduate course on percutaneous absorption. In vitro release of PHC from the three bases to an aqueous receptor phase through silicone membrane was monitored spectrophotometrically at a wavelength of 290 nm. By monitoring and attempting to explain the numerous possible reasons for the different rates of drug release from the three vehicles, it was hoped that the students would gain a better understanding of the complexities of transdermal drug administration. Overall, the experiment would appear to be a good model for student investigation into factors affecting the release of drugs from topical formulations.
- Full Text:
- Date Issued: 1994
Application of the Minolta chromameter to the assessment of corticosteroid-induced skin blanching
- Walker, Roderick B, Haigh, John M, Smith, Eric W
- Authors: Walker, Roderick B , Haigh, John M , Smith, Eric W
- Date: 2000
- Language: English
- Type: Book chapter , text
- Identifier: vital:6451 , http://hdl.handle.net/10962/d1006639
- Full Text:
- Date Issued: 2000
- Authors: Walker, Roderick B , Haigh, John M , Smith, Eric W
- Date: 2000
- Language: English
- Type: Book chapter , text
- Identifier: vital:6451 , http://hdl.handle.net/10962/d1006639
- Full Text:
- Date Issued: 2000
Ranking of topical corticosteroids: principles and results
- Smith, Eric W, Haigh, John M
- Authors: Smith, Eric W , Haigh, John M
- Date: 1993
- Language: English
- Type: text , Article
- Identifier: vital:6434 , http://hdl.handle.net/10962/d1006607
- Description: The increasing synthesis and use of topical corticosteroid products over the past 30 years has necessitated the development of suitable methods for evaluating the efficacy and potency of new drug entities. Several in vivo models have been developed in this regard using laboratory animals and human subjects. Generally, these tests measure the difference in the non-immunological inflammatory response to an exogenous inflammatory mediator in the presence and absence of the corticosteroid under test. There are also immunologically based assays and several tests which assess the anti proliferative effects of the drug. Several comparative disease model evaluations have also been developed using human subjects. Most of these assays are non-ideal from one point of view or another: most are invasive methods which require some form of trauma to be induced in the skin and therefore problematic to perform and monitor.
- Full Text:
- Date Issued: 1993
- Authors: Smith, Eric W , Haigh, John M
- Date: 1993
- Language: English
- Type: text , Article
- Identifier: vital:6434 , http://hdl.handle.net/10962/d1006607
- Description: The increasing synthesis and use of topical corticosteroid products over the past 30 years has necessitated the development of suitable methods for evaluating the efficacy and potency of new drug entities. Several in vivo models have been developed in this regard using laboratory animals and human subjects. Generally, these tests measure the difference in the non-immunological inflammatory response to an exogenous inflammatory mediator in the presence and absence of the corticosteroid under test. There are also immunologically based assays and several tests which assess the anti proliferative effects of the drug. Several comparative disease model evaluations have also been developed using human subjects. Most of these assays are non-ideal from one point of view or another: most are invasive methods which require some form of trauma to be induced in the skin and therefore problematic to perform and monitor.
- Full Text:
- Date Issued: 1993