Browsing Journal Articles by Author "Walters, Chavon R"

Now showing items 1-14 of 14

Aggregation and dissolution of silver nanoparticles in a laboratory-based freshwater microcosm under simulated environmental conditions

Author: Walters, Chavon R ; Pool, E ; Somerset, V Date: Apr 2014 Silver nanoparticles (NP) are used in several applications, including their use as antimicrobial agents in textiles, personal care, and other domestic products. As such, there is a high potential for the release of silver nanoparticles (AgNP) ... Read more
Baseline monitoring of mercury levels in environmental matrices in the Limpopo Province

Author: Walters, Chavon R ; Couto, M ; McClurg, N ; Silwana, B ; Somerset, V Date: Feb 2017 Mercury (Hg) speciation and bioavailability were studied in surface water, surface sediment and freshwater fish samples collected upstream and downstream of the Medupi (currently under construction) and Matimba power stations in the Waterberg ... Read more
Bulk scale industrial effluent reuse potential in South Africa

Author: Steyn, Maronel ; Walters, Chavon R ; Mathye, Salamina M ; Thwala, Melusi ; Banoo, Ismail ; Ndlela, Luyanda L ; Tancu, Yolanda ; Genthe, Bettina Date: Nov 2021 Rationale: Water scarcity, increased pollution, unprecedented population growth and climate change are collectively driving the need to reuse water with the aim to enhance water security, sustainability, and resilience. It is clear that South ... Read more
Bulk scale industrial effluent reuse potential in South Africa

Author: Steyn, Maronel ; Walters, Chavon R Date: Nov 2021 Globally, responsible and efficient water management is fast becoming a pressing reality for domestic users, agriculture and industry alike. The challenge is therefore to capitalise on the limited water we currently have. Solution: Bulk-scale ... Read more
Combined silver nanoparticles and temperature effects in the Cape River crab Potamanautes perlatus - Interactions between chemical and climatic stressors

Author: Walters, Chavon R ; Cheng, Po-Hsun ; Pool, EJ ; Somerset, VS Date: Mar 2017 The influence of silver nanoparticles (AgNPs) and temperature variation on toxicity and oxidative stress responses were investigated in the tissues of the Cape River crab Potamanautes perlatus following a seven-day exposure period. Toxicity ... Read more
A decision support tool for industrial water reuse in South Africa

Author: Steyn, Maronel ; Genthe, Bettina ; Banoo, Ismail ; Thwala, Melusi ; Roos, Thomas H ; Walters, Chavon R ; Ramakhwatho, F Date: Aug 2020 Water scarcity, increased pollution, unprecedented population growth and climate change are all driving the need to reuse water to secure the future of the country. It is clear that South Africa’s already strained water resources will become ... Read more
The drugs we wash away: What happens to antiretrovirals in the aquatic environment?

Author: Walters, Chavon R Date: Jun 2017 With increasing frequency countries are faced with a new set of chemicals that are contaminating the environment. These so-called ‘emerging contaminants’ hold potential risk to humans and/or the environment. The challenge is that, generally, ... Read more
Ecotoxicity of silver nanomaterials in the aquatic environment: A review of literature and gaps in nano-toxicological research

Author: Walters, Chavon R ; Pool, EJ ; Somerset, VS Date: Aug 2014 There has been extensive growth in nanoscale technology in the last few decades to such a degree that nanomaterials (NMs) have become a constituent in a wide range of commercial and domestic products. With NMs already in use in several consumer ... Read more
Effect of temperature on oxidative stress parameters and enzyme activity in tissues of Cape river crab (Potamanautes perlatus) following exposure to silver nanoparticles (AgNPs)

Author: Walters, Chavon R ; Cheng, Po-Hsun ; Pool, E ; Somerset, V Date: Jan 2016 Biomarkers of oxidative stress have been widely used in environmental assessments to evaluate the effects of exposure of aquatic organisms to contaminants from various anthropogenic sources. Silver nanoparticles (AgNP), the most produced NP ... Read more
The effects of silver nanoparticles on RAW 264.7. Macrophages and human whole blood cell cultures

Author: Lategan, KL ; Walters, Chavon R ; Pool, EJ Date: Jan 2019 Silver nanoparticles (AgNPs) are commonly found in consumer products due to their antimicrobial properties. This study evaluated the effects of AgNPs on the murine macrophage cell line RAW 264.7 and human whole blood cell cultures (WBCs). ... Read more
Five-year records of mercury wet deposition flux at GMOS sites in the Northern and Southern hemispheres

Author: Sprovieri, F ; Pirrone, N ; Bencardino, M ; D'Amore, F ; Angot, H ; Walters, Chavon R Date: Feb 2017 The atmospheric deposition of mercury (Hg) occurs via several mechanisms, including dry and wet scavenging by precipitation events. In an effort to understand the atmospheric cycling and seasonal depositional characteristics of Hg, wet ... Read more
Intracellular ice and cell survival in cryo-exposed embryonic axes of recalcitrant seeds of Acer saccharinum: an ultrastructural study of factors affecting cell and ice structures

Author: Wesley-Smith, J ; Berjak, P ; Pammenter, NW ; Walters, Chavon R Date: Mar 2014 Cryopreservation is the only long-term conservation strategy available for germplasm of recalcitrant-seeded species. Efforts to cryopreserve this form of germplasm are hampered by potentially lethal intracellular freezing events; thus, it is ... Read more
Review of mercury pollution in South Africa: current status

Author: Walters, Chavon R ; Somerset, VS ; Leaner, JJ ; Nel, JM Date: Aug 2011 The present paper is a review on the status of mercury (Hg) as a pollutant in South African aquatic ecosystems. Spatial patterns of Hg distribution and bioaccumulation in water resources were investigated by collecting and analyzing multimedia ... Read more
Why is intracellular ice lethal? A microscopical study showing evidence of programmed cell death in cryo-exposed embryonic axes of recalcitrant seeds of Acer saccharinum

Author: Wesley-Smith, J ; Walters, Chavon R ; Pammenter, NW ; Berjak, P Date: Oct 2015 Background and Aims Conservation of the genetic diversity afforded by recalcitrant seeds is achieved by cryopreservation, in which excised embryonic axes (or, where possible, embryos) are treated and stored at temperatures lower than -180(sub0)C ... Read more

Now showing items 1-14 of 14

Browse

All of ResearchSpace
This Collection
- By Issue Date
- Authors
- Titles
- Subjects
- Publication Type
- Cluster
- Impact Area

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.

Browsing Journal Articles by Author "Walters, Chavon R"

Browsing Journal Articles by Author "Walters, Chavon R"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect