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Browsing by Author "Musee, N"

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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
Post engineered nanomaterials lifespan: nanowastes classification, legislative development/implementation challenges, and proactive approaches

Author: Musee, N Date: May 2012 This presentation defines nanowastes, analyses its lifestyle, classifies it and states its management challenges. The classification looks at application hazards, exposure potency and risk of disposal. Read more
Potential risks of nanotechnology to humans and environment: implications and response mechanisms in Africa

Author: Musee, N ; Sikhwivhilu, L ; Nota, N ; Schaefer, Lisa M Date: Nov 2011 Historically, development of mankind has been closely intertwined with scientific and technological advancements. In the 21st century, nanotechnology has emerged as an enabling technology with enormous potential of revolutionizing social, ... Read more
Potential susceptibility inhibitory effect of Ag and ZnO engineered nanoparticles on bacterial strains: effect of pH and temperature

Author: Mboyi, A ; Musee, N ; Zvimba, JN ; Momba, MNB Date: Aug 2013 The economic and social benefits of metallic silver (n-Ag) and zinc oxide (n-ZnO) engineered nanoparticles (ENPs) applications in medical, technological, environmental remediation, consumer products, among other have widely been demonstrated. ... Read more
Qualitative and quantitative predictions of environmental exposure to nanomaterials from nanowaste streams

Author: Musee, N Date: Aug 2009 This presentation investigates the presence of evidence of increasing quantities of nanowaste streams into the environment, as well as the trends for nanowastes generation. The growth of nano-related patents is discussed, and the growth in ... Read more
Relevance of nanotechnology to Africa: synthesis, applications and safety

Author: Musee, N ; Sikhwivhilu, L ; Gulumian, M Date: Jul 2012 In this chapter, two nanotechnology-based applications relevant to Africa in promoting sustainability and achievement of the Millennium Development Goals (MDGs) are presented. The applications comprise the provision of therapeutic treatment ... Read more
Simple models for estimating nanomaterials accumulation in the environment: a case of JHB

Author: Musee, N ; Nota, N Date: Sep 2009 This presentation commences by briefly defining nanotechnology, as well as nanotechnology application and products. Examples of nanotechnology risks concerns are supplied, followed by a risk assessment of nanomaterials in product lifecycle. ... Read more
Simulated environmental risk estimation of engineered nanomaterials: a case of cosmetics in Johannesburg City

Author: Musee, N Date: Sep 2011 This paper attempts to quantify the potential risks posed by engineered nanomaterials (ENMs) to the aquatic and terrestrial ecosystems from cosmetic-based nanoproducts. The predicted environmental concentrations (PEC) were modelled for the ... Read more
South African research agenda to investigate the potential environmental, health and safety risks of nanotechnology

Author: Musee, N ; Brent, AC ; Ashton, PJ Date: Apr 2010 The South African perspective on nanotechnology, recently articulated through its national strategy, envisages nanotechnology to provide solutions to some of the country’s key development challenges, such as the provision of safe water and ... 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
Statistical modelling approach to derive quantitative nanowastes classification index; estimation of nanomaterials exposure

Author: Ntaka, L ; Musee, N ; Das, Sonali ; Muzenda, E Date: Aug 2013 The widespread use of engineered nanomaterials (ENMs) in consumer products and industrial applications has raised concerns because of their potential impacts in the environmental systems. These concerns are due to dramatically increasing ... Read more
Study on the interactions of Ag nanoparticles with low molecular weight organic matter using first principles calculations

Author: Nyangiwe, Nangamso N ; Ouma, CN ; Musee, N Date: Oct 2017 Experimental studies on environmental processes such as aggregation, disaggregation, dissolution, surface transformation, and adsorption of engineered nanoparticles (ENPs) in the aquatic systems are reported to be influenced by their interactions ... 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
The toxicity of oxidised DWCNTs to the aquatic organisms, and related causing mechanisms

Author: Lukhele, LP ; Musee, N ; Wepener, V ; Mamba, BB Date: Aug 2013 Carbon nanotubes (CNTs) find wide applications as their science and applicability are well understood. According to Lux Research Inc., the market for CNTs increased from $43 million in 2005 to $260 million by 2010. Whilst successful applications ... 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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