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Browsing by Author "Thwala, Melusi"

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Monitoring fate and behaviour of Nanoceria under relevant environmental conditions

Author: Tancu, Y ; Thwala, Melusi ; Musyoka, Nicholas M ; Musee, N Date: Nov 2014 The exponential use of engineered nanoparticles (ENPs) in commercial applications and of their resultant increasing release into the aquatic systems raises concerns as their potential impacts are unknown. According to the Organisation for ... Read more
Nano-enabled products in South Africa and the assessment of environmental exposure potential for engineered nanomaterials

Author: Moeta, Pheeha J ; Wesley-Smith, J ; Maity, Arjun ; Thwala, Melusi Date: Jun 2019 In order to address risks associated with nanotechnology, there needs to be improved understanding of potential sources of engineered nanomaterials (ENMs) into the environment. Nano-enabled products (NEPs) are amongst such sources, and the ... Read more
The oxidative toxicity of Ag and ZnO nanoparticles towards the aquatic plant Spirodela punctuta and the role of testing media parameters

Author: Thwala, Melusi ; Musee, N ; Sikhwivhilu, L ; Wepener, V Date: Sep 2013 The toxicity effects of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs) on the duckweed Spirodela punctuta were studied to investigate the potential risks posed by these ENPs towards higher aquatic plants. The influence of ... Read more
The oxidative toxicity of Ag and ZnO nanoparticles towards the aquatic plant Spirodela punctuta and the role of testing media parameters: Conference paper

Author: Thwala, Melusi ; Musee, N ; Sikhwivhilu, L ; Wepener, V Date: Aug 2013 The toxicity effects of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs) on the duckweed Spirodela punctuta were studied to investigate the potential risks posed by these ENPs towards higher aquatic plants. The influence of ... Read more
The stability of Ag and ZnO engineered nanoparticles in Hoagland's nutrient water: the role of particle size and morphology

Author: Radebe, N ; Thwala, Melusi ; Cele, LM ; Sikhwivhilu, L ; Musee, N ; Shumbula, P Date: Aug 2013 The current study seeks to investigate the dissolution dynamics of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs), and how this affects their uptake by aquatic higher plants. First, the influence of particle size and ... Read more
Stability of silver nanoparticles (nAg) in aqueous solution: the role of particle size and water ionic strength

Author: Radebe, N ; Cele, LM ; Sikhwivhilu, L ; Shumbula, P ; Musee, N ; Thwala, Melusi Date: 2014 Silver nanoparticles (nAg) are currently some of the widely produced and applied in commercial products. Their high usage translates to an increased potential to environmental release, and more concerning is their complex toxicity towards ... Read more
Toxicity effects of Fe2O3, TiO2, ZnO, and Ag engineered nanomaterials (ENMs) on the macrophyte Spirodela species

Author: Thwala, Melusi ; Musee, N ; Wepener, V ; Oberholster, Paul J Date: 01 Sep 2010 This study is according to current literature the first to investigate the toxicity effects of ENMs on higher aquatic plants. Such information is vital for aquatic ecosystem protection information from the relatively less understood ENMs. The ... Read more
Zinc oxide and silver nanoparticles influence the antioxidative status in a higher aquatic plant, Spirodela punctata

Author: Thwala, Melusi ; Musee, N ; Wepener, V Date: Sep 2012 The authors present evidence of free radical activity and resultant anti-oxidative defence in Spirodela plants after exposure to 0.01-1000 mg/L of ZnO and Ag nanoparticles (NPs) over 96-h and 14-d. The quantification of reactive nitrogen and ... Read more
Zinc oxide and silver nanoparticles influence the antioxidative status in a higher aquatic plant, Spirodela punctata

Author: Thwala, Melusi ; Musee, N ; Wepener, V Date: Sep 2012 The authors present evidence of free radical activity and resultant anti-oxidative defence in Spirodela plants after exposure to 0.01-1000 mg/L of ZnO and Ag nanoparticles (NPs) over 96-h and 14-d. The quantification of reactive nitrogen and ... Read more

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Browsing by Author "Thwala, Melusi"

Browsing by Author "Thwala, Melusi"

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Social Connect