Curiosity first, applications later
- Berold, Robert, Limson, Janice L
- Authors: Berold, Robert , Limson, Janice L
- Date: 2009
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7188 , http://hdl.handle.net/10962/d1006281 , http://www.sajs.co.za/sites/default/files/publications/pdf/1-4-1-PB.pdf , Nyokong, Tebello
- Description: Tebello Nyokong speaks to Robert Berold and Janice Limson about her career as a chemist. Tebello Nyokong, who holds a research chair in medicinal chemistry and nanotechnology at Rhodes University, has become the first South African scientist to win the L’Oreal-UNESCO award for women in science, in the physical sciences. Only one laureate is selected from each of five world regions, and Nyokong is the 2009 laureate for Africa and the Arab states. She and the winners from the other four regions travel to Paris in March to each accept the award and a generous prize of close to R1 million. Nyokong now heads the new Nanotechnology Innovation Centre for medical sensors: the biggest single research investment in the history of Rhodes. Linked to other nanotechnology centres in the country, it is designed to bridge the gap between research and the market.
- Full Text:
- Date Issued: 2009
- Authors: Berold, Robert , Limson, Janice L
- Date: 2009
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7188 , http://hdl.handle.net/10962/d1006281 , http://www.sajs.co.za/sites/default/files/publications/pdf/1-4-1-PB.pdf , Nyokong, Tebello
- Description: Tebello Nyokong speaks to Robert Berold and Janice Limson about her career as a chemist. Tebello Nyokong, who holds a research chair in medicinal chemistry and nanotechnology at Rhodes University, has become the first South African scientist to win the L’Oreal-UNESCO award for women in science, in the physical sciences. Only one laureate is selected from each of five world regions, and Nyokong is the 2009 laureate for Africa and the Arab states. She and the winners from the other four regions travel to Paris in March to each accept the award and a generous prize of close to R1 million. Nyokong now heads the new Nanotechnology Innovation Centre for medical sensors: the biggest single research investment in the history of Rhodes. Linked to other nanotechnology centres in the country, it is designed to bridge the gap between research and the market.
- Full Text:
- Date Issued: 2009
SA scientist one of the top five female physical scientists
- Authors: Limson, Janice L
- Date: 2008
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7189 , http://hdl.handle.net/10962/d1006283 , http://www.scienceinafrica.co.za/2008/october/nyokong.htm
- Description: South African scientist Professor Tebello Nyokong scoops 2009 L’ORÉAL-UNESCO For Women in Science Award. Announced on November 10, South African scientist Professor Tebello Nyokong has become the first South African scientist to win the L’ORÉALUNESCO award for women in science for research in physical sciences.
- Full Text:
- Date Issued: 2008
- Authors: Limson, Janice L
- Date: 2008
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7189 , http://hdl.handle.net/10962/d1006283 , http://www.scienceinafrica.co.za/2008/october/nyokong.htm
- Description: South African scientist Professor Tebello Nyokong scoops 2009 L’ORÉAL-UNESCO For Women in Science Award. Announced on November 10, South African scientist Professor Tebello Nyokong has become the first South African scientist to win the L’ORÉALUNESCO award for women in science for research in physical sciences.
- Full Text:
- Date Issued: 2008
A novel biosensor for the detection and monitoring of -d-galactosidase of faecal origin in water
- Wutor, V C, Togo, C A, Limson, Janice L, Pletschke, Brett I
- Authors: Wutor, V C , Togo, C A , Limson, Janice L , Pletschke, Brett I
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6468 , http://hdl.handle.net/10962/d1005797 , http://dx.doi.org/10.1016/j.enzmictec.2006.10.039
- Description: A voltammetric sensor prepared by the immobilization of metallophthalocyanine complexes onto a glassy carbon electrode has been developed for the detection of β-d-galactosidase (B-GAL) of faecal origin in water. Electrooxidation of chlorophenol red, a breakdown product of the chromogenic substrate chlorophenol red β-d-galactopyranoside, was used as a measure of β-d-galactosidase activity. At metallophthalocyanine modified electrodes, in particular copper(II) phthalocyanine, a decrease in electrode fouling was observed. The sensor was sensitive to fluctuations in pH, not significantly affected by temperature variations and could detect one colony forming unit/100 mL in 15 min. Loss of 40% sensitivity was observed over a period of 30 days. A strong correlation between sensor sensitivity and colony forming units was observed. The sensor is capable of detecting viable but nonculturable bacteria, overcoming this drawback of the use of culture media for detection of coliforms.
- Full Text:
- Date Issued: 2007
- Authors: Wutor, V C , Togo, C A , Limson, Janice L , Pletschke, Brett I
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6468 , http://hdl.handle.net/10962/d1005797 , http://dx.doi.org/10.1016/j.enzmictec.2006.10.039
- Description: A voltammetric sensor prepared by the immobilization of metallophthalocyanine complexes onto a glassy carbon electrode has been developed for the detection of β-d-galactosidase (B-GAL) of faecal origin in water. Electrooxidation of chlorophenol red, a breakdown product of the chromogenic substrate chlorophenol red β-d-galactopyranoside, was used as a measure of β-d-galactosidase activity. At metallophthalocyanine modified electrodes, in particular copper(II) phthalocyanine, a decrease in electrode fouling was observed. The sensor was sensitive to fluctuations in pH, not significantly affected by temperature variations and could detect one colony forming unit/100 mL in 15 min. Loss of 40% sensitivity was observed over a period of 30 days. A strong correlation between sensor sensitivity and colony forming units was observed. The sensor is capable of detecting viable but nonculturable bacteria, overcoming this drawback of the use of culture media for detection of coliforms.
- Full Text:
- Date Issued: 2007
Rhodes University Chemistry Professor Tebello Nyokong Receives The 2009 L'oreal-Unesco Award For Women In Science
- Authors: Limson, Janice L
- Language: English
- Type: Article
- Identifier: vital:7200 , http://hdl.handle.net/10962/d1006365
- Description: Professor Tebella Nyokong has become the first South African scientist to win the L'OREAL-UNESCO award for women in science, for physical sciences. The awards honour exceptional women in science. Each year one laureate is selected from five world regions. Professor Nyokong is the laureate for Africa and the Arab states for 2009.
- Full Text:
- Authors: Limson, Janice L
- Language: English
- Type: Article
- Identifier: vital:7200 , http://hdl.handle.net/10962/d1006365
- Description: Professor Tebella Nyokong has become the first South African scientist to win the L'OREAL-UNESCO award for women in science, for physical sciences. The awards honour exceptional women in science. Each year one laureate is selected from five world regions. Professor Nyokong is the laureate for Africa and the Arab states for 2009.
- Full Text:
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