Humanities colloquium address
- Authors: Badat, Saleem
- Date: 2011-11-11
- Language: English
- Type: Text
- Identifier: vital:7813 , http://hdl.handle.net/10962/d1016006
- Full Text:
- Date Issued: 2011-11-11
- Authors: Badat, Saleem
- Date: 2011-11-11
- Language: English
- Type: Text
- Identifier: vital:7813 , http://hdl.handle.net/10962/d1016006
- Full Text:
- Date Issued: 2011-11-11
Vice-Chancellor's report to Convocation
- Authors: Henderson, Derek Scott
- Date: 1981-05-15
- Language: English
- Type: Text
- Identifier: vital:7430 , http://hdl.handle.net/10962/d1018307
- Full Text:
- Date Issued: 1981-05-15
- Authors: Henderson, Derek Scott
- Date: 1981-05-15
- Language: English
- Type: Text
- Identifier: vital:7430 , http://hdl.handle.net/10962/d1018307
- Full Text:
- Date Issued: 1981-05-15
Polyamide nanofiber membranes functionalized with zinc phthalocyanines
- Goethals, Annelies, Mugadza, Tawanda, Arslanoglu, Yasin, Zugle, Ruphino, Antunes, Edith M, Hulle, Stijn W H Van, Nyokong, Tebello, Clerck, Karen De
- Authors: Goethals, Annelies , Mugadza, Tawanda , Arslanoglu, Yasin , Zugle, Ruphino , Antunes, Edith M , Hulle, Stijn W H Van , Nyokong, Tebello , Clerck, Karen De
- Language: English
- Type: Article
- Identifier: vital:7313 , http://hdl.handle.net/10962/d1020539
- Description: Electrospinning is an efficient method for the production of polyamide nanofiber membranes that are suitable for water filtration. Previous studies have shown that nanofiber membranes have high clean water permeability. The pathogen removal efficiency can be improved by functionalization with (organic) biocides. However, these membranes, like other membranes, are vulnerable to fouling which reduces the filtration efficiency. Therefore the present article investigates the potential of zinc phthalocyanines, which can produce singlet oxygen in the presence of visible light, as a functionalizing agent. The polyamide nanofiber membranes were functionalized with phthalocyanines using both a pre-functionalizing and post-functionalizing method. Only the post-functionalization method shows to result in nanofiber membranes capable of producing singlet oxygen. After 30 min 45% of 1,2-diphenylisobenzofuran (DPBF), used as an oxygen quencher, was removed by reaction with singlet oxygen. This resulted in a removal rate of 0.33 mol DBPF mol−1Zn min−1. During short term leaching tests, phthalocyanines could not be detected. , Original publication is available at http://dx.doi.org/10.1002/app.40486
- Full Text: false
- Authors: Goethals, Annelies , Mugadza, Tawanda , Arslanoglu, Yasin , Zugle, Ruphino , Antunes, Edith M , Hulle, Stijn W H Van , Nyokong, Tebello , Clerck, Karen De
- Language: English
- Type: Article
- Identifier: vital:7313 , http://hdl.handle.net/10962/d1020539
- Description: Electrospinning is an efficient method for the production of polyamide nanofiber membranes that are suitable for water filtration. Previous studies have shown that nanofiber membranes have high clean water permeability. The pathogen removal efficiency can be improved by functionalization with (organic) biocides. However, these membranes, like other membranes, are vulnerable to fouling which reduces the filtration efficiency. Therefore the present article investigates the potential of zinc phthalocyanines, which can produce singlet oxygen in the presence of visible light, as a functionalizing agent. The polyamide nanofiber membranes were functionalized with phthalocyanines using both a pre-functionalizing and post-functionalizing method. Only the post-functionalization method shows to result in nanofiber membranes capable of producing singlet oxygen. After 30 min 45% of 1,2-diphenylisobenzofuran (DPBF), used as an oxygen quencher, was removed by reaction with singlet oxygen. This resulted in a removal rate of 0.33 mol DBPF mol−1Zn min−1. During short term leaching tests, phthalocyanines could not be detected. , Original publication is available at http://dx.doi.org/10.1002/app.40486
- Full Text: false
Welcome and public declaration at the inauguration of the Bantu Stephen Biko Building
- Authors: Badat, Saleem
- Date: 2008-09-17
- Language: English
- Type: Text
- Identifier: vital:7679 , http://hdl.handle.net/10962/d1015824
- Full Text:
- Date Issued: 2008-09-17
- Authors: Badat, Saleem
- Date: 2008-09-17
- Language: English
- Type: Text
- Identifier: vital:7679 , http://hdl.handle.net/10962/d1015824
- Full Text:
- Date Issued: 2008-09-17
Carbon nanotube-enhanced photoelectrochemical properties of metallo-octacarboxyphthalocyanines
- Mphahlele, Nonhlanhla E., Roux, Lukas Le, Jafta, Charl J., Cele, Leskey, Mathe, Mkhulu K., Nyokong, Tebello, Kobayashi, Nagao, Ozoemena, Kenneth I.
- Authors: Mphahlele, Nonhlanhla E. , Roux, Lukas Le , Jafta, Charl J. , Cele, Leskey , Mathe, Mkhulu K. , Nyokong, Tebello , Kobayashi, Nagao , Ozoemena, Kenneth I.
- Language: English
- Type: Article
- Identifier: vital:7312 , http://hdl.handle.net/10962/d1020538
- Description: The photoelectrochemistry of metallo-octacarboxyphthalocyanines (MOCPc, where M = Zn or Si(OH)2) integrated with MWCNTs for the development of dye-sensitized solar cells (DSSCs) is reported. The DSSC performance (obtained from the photo-chronoamperometric and photo-impedimetric data) decreased as ZnOCPc > (OH)2SiOCPc. The incorporation of the MWCNTs on the surface of the TiO2 film (MOCPc–MWCNT systems) gave higher photocurrent density than the bare MOCPc complexes. Also, from the EIS results, the MOCPc–MWCNT hybrids gave faster charge transport kinetics (approximately three times faster) compared to the bare MOCPc complexes. The electron lifetime was slightly longer (ca. 6 ms) at the ZnOCPc systems than at the (OH)2SiOCPc system (ca. 4 ms) meaning that the presence of the MWCNTs on the surface of the TiO2 film did not show any significant improvement on preventing charge recombination process. , Original publication is available at http://dx.doi.org/10.1007/s10853-013-7710-1
- Full Text: false
- Authors: Mphahlele, Nonhlanhla E. , Roux, Lukas Le , Jafta, Charl J. , Cele, Leskey , Mathe, Mkhulu K. , Nyokong, Tebello , Kobayashi, Nagao , Ozoemena, Kenneth I.
- Language: English
- Type: Article
- Identifier: vital:7312 , http://hdl.handle.net/10962/d1020538
- Description: The photoelectrochemistry of metallo-octacarboxyphthalocyanines (MOCPc, where M = Zn or Si(OH)2) integrated with MWCNTs for the development of dye-sensitized solar cells (DSSCs) is reported. The DSSC performance (obtained from the photo-chronoamperometric and photo-impedimetric data) decreased as ZnOCPc > (OH)2SiOCPc. The incorporation of the MWCNTs on the surface of the TiO2 film (MOCPc–MWCNT systems) gave higher photocurrent density than the bare MOCPc complexes. Also, from the EIS results, the MOCPc–MWCNT hybrids gave faster charge transport kinetics (approximately three times faster) compared to the bare MOCPc complexes. The electron lifetime was slightly longer (ca. 6 ms) at the ZnOCPc systems than at the (OH)2SiOCPc system (ca. 4 ms) meaning that the presence of the MWCNTs on the surface of the TiO2 film did not show any significant improvement on preventing charge recombination process. , Original publication is available at http://dx.doi.org/10.1007/s10853-013-7710-1
- Full Text: false
Empire state college webinar in celebration of the Inauguration of Dr. Merodie A. Hancock as the fourth President of Empire state college
- Authors: Badat, Saleem
- Date: 2014-03-06
- Language: English
- Type: Text
- Identifier: vital:7867 , http://hdl.handle.net/10962/d1016416
- Full Text:
- Date Issued: 2014-03-06
- Authors: Badat, Saleem
- Date: 2014-03-06
- Language: English
- Type: Text
- Identifier: vital:7867 , http://hdl.handle.net/10962/d1016416
- Full Text:
- Date Issued: 2014-03-06
Enhanced nonlinear optical properties of octa-substituted lead and cadmium phthalocyanines when embedded in poly(bisphenol A carbonate) as thin films
- Mkhize, Colin, Britton, Jonathan, Nyokong, Tebello
- Authors: Mkhize, Colin , Britton, Jonathan , Nyokong, Tebello
- Language: English
- Type: Article
- Identifier: vital:7320 , http://hdl.handle.net/10962/d1020565
- Description: This work presents photophysical and nonlinear optical properties of a novel Cd 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (CdOtBPPc) and compare them with those of Pb 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (PbOtBPPc). For both the CdOtBPPc and PbOtBPPc, third order imaginary susceptibility and second order hyperpolarizability values were found to be within the limit set for good optical limiters. The Pcs were embedded in poly (methyl methacrylate) (PMMA) and poly(bisphenol A carbonate) (PBC) as thin films. The optical limiting values of the Pcs once embedded in film were found to be greatly improved and the limiting fluence of each film was well below the maximum threshold. Both PbOtBPPc and CdOtBPPc showed better optical limiting when embedded in PBC compared to PMMA. CdOtBPPc shows better nonlinear optical behavior than PbOtBPPc in solution and as thin films, even though the former is aggregated in solution. , Original publication is available at http://dx.doi.org/10.1016/j.poly.2014.07.025
- Full Text: false
- Authors: Mkhize, Colin , Britton, Jonathan , Nyokong, Tebello
- Language: English
- Type: Article
- Identifier: vital:7320 , http://hdl.handle.net/10962/d1020565
- Description: This work presents photophysical and nonlinear optical properties of a novel Cd 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (CdOtBPPc) and compare them with those of Pb 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (PbOtBPPc). For both the CdOtBPPc and PbOtBPPc, third order imaginary susceptibility and second order hyperpolarizability values were found to be within the limit set for good optical limiters. The Pcs were embedded in poly (methyl methacrylate) (PMMA) and poly(bisphenol A carbonate) (PBC) as thin films. The optical limiting values of the Pcs once embedded in film were found to be greatly improved and the limiting fluence of each film was well below the maximum threshold. Both PbOtBPPc and CdOtBPPc showed better optical limiting when embedded in PBC compared to PMMA. CdOtBPPc shows better nonlinear optical behavior than PbOtBPPc in solution and as thin films, even though the former is aggregated in solution. , Original publication is available at http://dx.doi.org/10.1016/j.poly.2014.07.025
- Full Text: false
Experience of Leadership, Management & Governance
- Authors: Badat, Saleem
- Date: 2010-04-22
- Language: English
- Type: Text
- Identifier: vital:7769 , http://hdl.handle.net/10962/d1015924
- Full Text:
- Date Issued: 2010-04-22
- Authors: Badat, Saleem
- Date: 2010-04-22
- Language: English
- Type: Text
- Identifier: vital:7769 , http://hdl.handle.net/10962/d1015924
- Full Text:
- Date Issued: 2010-04-22
Tracking political banishments: sojourns in the archives
- Authors: Badat, Saleem
- Date: 2011-02-16
- Language: English
- Type: Text
- Identifier: vital:7818 , http://hdl.handle.net/10962/d1016011
- Full Text:
- Date Issued: 2011-02-16
- Authors: Badat, Saleem
- Date: 2011-02-16
- Language: English
- Type: Text
- Identifier: vital:7818 , http://hdl.handle.net/10962/d1016011
- Full Text:
- Date Issued: 2011-02-16
Vice-Chancellor's speech at the Grahamstown Technical College reception for national secretarial course students
- Authors: Henderson, Derek Scott
- Date: 1986-10-06
- Language: English
- Type: Text
- Identifier: vital:7539 , http://hdl.handle.net/10962/d1018416
- Full Text:
- Date Issued: 1986-10-06
- Authors: Henderson, Derek Scott
- Date: 1986-10-06
- Language: English
- Type: Text
- Identifier: vital:7539 , http://hdl.handle.net/10962/d1018416
- Full Text:
- Date Issued: 1986-10-06
The current wage negotiations impasse
- Authors: Badat, Saleem
- Date: 2014-04-07
- Language: English
- Type: Text
- Identifier: vital:7891 , http://hdl.handle.net/10962/d1016440
- Full Text:
- Date Issued: 2014-04-07
- Authors: Badat, Saleem
- Date: 2014-04-07
- Language: English
- Type: Text
- Identifier: vital:7891 , http://hdl.handle.net/10962/d1016440
- Full Text:
- Date Issued: 2014-04-07
Address at the Student Volunteer programme awards
- Authors: Badat, Saleem
- Date: 2007-10-25
- Language: English
- Type: Text
- Identifier: vital:7663 , http://hdl.handle.net/10962/d1015808
- Full Text:
- Date Issued: 2007-10-25
- Authors: Badat, Saleem
- Date: 2007-10-25
- Language: English
- Type: Text
- Identifier: vital:7663 , http://hdl.handle.net/10962/d1015808
- Full Text:
- Date Issued: 2007-10-25
New staff welcome 2009
- Authors: Badat, Saleem
- Date: 2009-02-12
- Language: English
- Type: Text
- Identifier: vital:7748 , http://hdl.handle.net/10962/d1015896
- Full Text:
- Date Issued: 2009-02-12
- Authors: Badat, Saleem
- Date: 2009-02-12
- Language: English
- Type: Text
- Identifier: vital:7748 , http://hdl.handle.net/10962/d1015896
- Full Text:
- Date Issued: 2009-02-12
Opening address S.A.I.L.I.S. Conference, E.L.
- Authors: Henderson, Derek Scott
- Date: 1984-09-17
- Language: English
- Type: Text
- Identifier: vital:7470 , http://hdl.handle.net/10962/d1018347
- Full Text:
- Date Issued: 1984-09-17
- Authors: Henderson, Derek Scott
- Date: 1984-09-17
- Language: English
- Type: Text
- Identifier: vital:7470 , http://hdl.handle.net/10962/d1018347
- Full Text:
- Date Issued: 1984-09-17
Rhodeo, Vol. 27, No. 2
- Date: 1973-03-08
- Subjects: Grahamstown -- Newspapers , Journalism, Students -- South Africa , Rhodes University -- Activate , Rhodes University -- Students , Student newspapers and periodicals -- South Africa
- Language: English
- Type: Text
- Identifier: vital:14644 , http://hdl.handle.net/10962/d1019516
- Description: Rhodeo is the Independent Student Newspaper of Rhodes University. Located in Grahamstown, Rhodeo was established in 1947, and renamed in 1994 as Activate. During apartheid Rhodeo became an active part of the struggle for freedom of expression as part of the now defunct South African Student Press Union. Currently Activate is committed to informing Rhodes University students, staff and community members about relevant issues, mainly on campus. These issues range from hard news to more creative journalism. While Activate acts as a news source, one of its main objectives it to be accessible as a training ground for student journalists. The newspaper is run entirely by the students and is published twice a term. Activate is a free newspaper which receives an annual grant from the Rhodes University Student Representative Council, however, majority of its revenue is generated through advertising.
- Full Text:
- Date Issued: 1973-03-08
- Date: 1973-03-08
- Subjects: Grahamstown -- Newspapers , Journalism, Students -- South Africa , Rhodes University -- Activate , Rhodes University -- Students , Student newspapers and periodicals -- South Africa
- Language: English
- Type: Text
- Identifier: vital:14644 , http://hdl.handle.net/10962/d1019516
- Description: Rhodeo is the Independent Student Newspaper of Rhodes University. Located in Grahamstown, Rhodeo was established in 1947, and renamed in 1994 as Activate. During apartheid Rhodeo became an active part of the struggle for freedom of expression as part of the now defunct South African Student Press Union. Currently Activate is committed to informing Rhodes University students, staff and community members about relevant issues, mainly on campus. These issues range from hard news to more creative journalism. While Activate acts as a news source, one of its main objectives it to be accessible as a training ground for student journalists. The newspaper is run entirely by the students and is published twice a term. Activate is a free newspaper which receives an annual grant from the Rhodes University Student Representative Council, however, majority of its revenue is generated through advertising.
- Full Text:
- Date Issued: 1973-03-08
Enhanced triplet state yields in aqueous media of asymmetric zinc phthalocyanines when conjugated to silver nanoflowers
- D’Souza, Sarah, George, Reama, Göksel, Meltem, Atilla, Devrim, Durmuş, Mahmut, Nyokong, Tebello
- Authors: D’Souza, Sarah , George, Reama , Göksel, Meltem , Atilla, Devrim , Durmuş, Mahmut , Nyokong, Tebello
- Language: English
- Type: Article
- Identifier: vital:7279 , http://hdl.handle.net/10962/d1020315
- Description: Novel low symmetry water-soluble zinc phthalocyanines (ZnPcs, complexes 1 and 2) were synthesized and then mixed with silver nanoflowers. Photophysical and photochemical studies were performed in order to determine the efficiency of complexes 1 and 2 as photosensitizers when alone and when combined with the silver nanoflowers. The Pcs show low fluorescence quantum yields and excellent triplet quantum yields of 0.78 (for 1) and 0.66 (for 2) in aqueous media. The triplet quantum yield values increased to 0.80 and 0.89, respectively, in the presence of silver nanoflowers. Long triplet lifetimes ranging from 180 to 200 μs in DMSO were obtained for complexes 1, 2 and their conjugates with silver nanoflowers. , Original publication is available at http://dx.doi.org/10.1016/j.poly.2015.08.017
- Full Text: false
- Authors: D’Souza, Sarah , George, Reama , Göksel, Meltem , Atilla, Devrim , Durmuş, Mahmut , Nyokong, Tebello
- Language: English
- Type: Article
- Identifier: vital:7279 , http://hdl.handle.net/10962/d1020315
- Description: Novel low symmetry water-soluble zinc phthalocyanines (ZnPcs, complexes 1 and 2) were synthesized and then mixed with silver nanoflowers. Photophysical and photochemical studies were performed in order to determine the efficiency of complexes 1 and 2 as photosensitizers when alone and when combined with the silver nanoflowers. The Pcs show low fluorescence quantum yields and excellent triplet quantum yields of 0.78 (for 1) and 0.66 (for 2) in aqueous media. The triplet quantum yield values increased to 0.80 and 0.89, respectively, in the presence of silver nanoflowers. Long triplet lifetimes ranging from 180 to 200 μs in DMSO were obtained for complexes 1, 2 and their conjugates with silver nanoflowers. , Original publication is available at http://dx.doi.org/10.1016/j.poly.2015.08.017
- Full Text: false
Higher Education in South Africa: governance, leadership and management challenges
- Authors: Badat, Saleem
- Date: 2011-09-28
- Language: English
- Type: Text
- Identifier: vital:7810 , http://hdl.handle.net/10962/d1016003
- Full Text:
- Date Issued: 2011-09-28
- Authors: Badat, Saleem
- Date: 2011-09-28
- Language: English
- Type: Text
- Identifier: vital:7810 , http://hdl.handle.net/10962/d1016003
- Full Text:
- Date Issued: 2011-09-28
Thinking Africa
- Authors: Badat, Saleem
- Date: 2011-07-06
- Language: English
- Type: Text
- Identifier: vital:7858 , http://hdl.handle.net/10962/d1016051
- Full Text:
- Date Issued: 2011-07-06
- Authors: Badat, Saleem
- Date: 2011-07-06
- Language: English
- Type: Text
- Identifier: vital:7858 , http://hdl.handle.net/10962/d1016051
- Full Text:
- Date Issued: 2011-07-06
Advancing women postgraduates and academics at Rhodes
- Authors: Badat, Saleem
- Date: 2013-06-01
- Language: English
- Type: Text
- Identifier: vital:7940 , http://hdl.handle.net/10962/d1016491
- Full Text:
- Date Issued: 2013-06-01
- Authors: Badat, Saleem
- Date: 2013-06-01
- Language: English
- Type: Text
- Identifier: vital:7940 , http://hdl.handle.net/10962/d1016491
- Full Text:
- Date Issued: 2013-06-01
Planning the years and decade ahead
- Authors: Badat, Saleem
- Date: 2014-01-11
- Language: English
- Type: Text
- Identifier: vital:7854 , http://hdl.handle.net/10962/d1016047
- Full Text:
- Date Issued: 2014-01-11
- Authors: Badat, Saleem
- Date: 2014-01-11
- Language: English
- Type: Text
- Identifier: vital:7854 , http://hdl.handle.net/10962/d1016047
- Full Text:
- Date Issued: 2014-01-11