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Now showing items 21-40 of 151

Cellulose nanomaterials: New generation materials for solving global issues

Author: Mokhena, Teboho C ; John, Maya J Date: Feb 2020 This review describes the recent advances in the production and application of cellulose nanomaterials. Cellulose nanomaterials (CNMs), especially cellulose nanocrystals and cellulose nanofibers, can be produced using different preparation ... Read more
Characterisation of engineered nanomaterials in nano-enabled products exhibiting priority environmental exposure

Author: Lehutso, Raisibe F ; Tancu, Yolanda ; Maity, Arjun ; Thwala, Melusi Date: Mar 2021 Analytical limitations have constrained the determination of nanopollution character from real-world sources such as nano-enabled products (NEPs), thus hindering the development of environmental safety guidelines for engineered nanomaterials ... Read more
Characterisation of pulp and paper mill sludge for beneficiation

Author: Jele, TB ; Sithole, Bishop B ; Lekha, Prabashni ; Andrew, Jerome E Date: May 2022 In this study, three different pulp and paper mill sludge (PPMS) samples collected from different South African mills were chemically and physically characterised to investigate their suitability for various beneficiation pathways. The overall ... Read more
Chemical modification of sugarcane bagasse with chitosan for the removal of phosphates in aqueous solution

Author: Manyatshe, Alusani ; Balogun, Mohammed O ; Nkambule, TTI ; Cele, Zamani ED ; Msagati, TAM Date: Nov 2020 Sugarcane bagasse is the major solid waste product of the sugarcane industry. As a plant-derived biomass, it is an attractive environmentally friendly alternative to petroleum-based materials. Being a non-food agriculture product, its use as ... Read more
The Circular Economy as Development Opportunity: Exploring Circular Economy Opportunities across South Africa’s Economic Sectors

Author: Godfrey, Linda K ; Nahman, Anton ; Oelofse, Suzanna HH ; Trotter, Douglas ; Khan, Sumaya ; Nontso, Zintle ; Magweregwede, Fleckson ; Sereme, Busisiwe V ; Okole, Blessed N ; Gordon, Gregory ER ; Brown, Bernadette ; Pillay, Boyse ; Schoeman, Chanel ; Fazluddin, Shahed ; Ojijo, Vincent O ; Cooper, Antony K ; Kruger, Daniel M ; Napier, Mark ; Mokoena, Refiloe ; Steenkamp, Anton J ; Msimanga, Xolile P ; North, Brian C ; Seetal, Ashwin R ; Mathye, Salamina M Date: Dec 2021 The intention of this book is to present the CSIR’s position and interpretation of the circular economy, and to use it to drive discussions on where immediate circular economy opportunities are achievable in South Africa. Opportunities that ... Read more
Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage

Author: Bambalaza, Sonwabo E ; Langmi, HW ; Mokaya, R ; Musyoka, Nicholas M ; Khotseng, LE Date: Dec 2020 We report on a concept of co-pelletization using mechanically robust hydroxylated UiO-66 to develop a metal-organic framework (MOF) monolith that contains 5 wt% electrospun polymer nanofibers, and consists of an architecture with alternating ... Read more
Colour tuning from violet to blue emission stimulated by various nickel oxide nanostructures: Influence of bias voltage towards volatile organic compounds vapours

Author: Mokoena, Teboho P ; Swart, HC ; Hillie, Kenneth T ; Motaung, DE Date: Mar 2021 Propanol and benzene, toluene, ethylenebenzene and xylene (BTEX) vapours are within the volatile organic compounds (VOCs) family and are utilized in industrial and petroleum goods, are greatly toxic in human health and environment. Therefore, ... Read more
Comparative study of graphene-polypyrrole and borophene-polypyrrole composites: Molecular dynamics modeling approach

Author: Folorunso, Oladipo ; Hamam, Y ; Sadiku, R ; Ray, Suprakas S ; Adekoya, GJ Date: 2021 In the search for the solution to energy storage problems, this study investigates the interfacial energy interaction and temperature stability of the composites made of polypyrrole-graphene-borophene (PPy-Gr-Bon) by using molecular dynamics ... Read more
A comparative study of supercritical fluid extraction and accelerated solvent extraction of lipophilic compounds from lignocellulosic biomass

Author: Khanyile, AT ; Andrew, Jerome E ; Paul, V ; Sithole, Bishop B Date: May 2022 The Box-Behnken experimental design technique investigated a comparative study of supercritical fluid extraction (SFE) and accelerated solvent extraction (ASE) of lipophilic compounds from pinewood sawdust. A response surface methodology was ... Read more
A comprehensive comparison study on magnetic behaviour, defects-related emission and Ni substitution to clarify the origin of enhanced acetone detection capabilities

Author: Nemufulwi, Murendeni I ; Swart, HC ; Mhlongo, Gugu H Date: Jul 2021 In this work, nickel (Ni) substituted zinc ferrite nanoparticles (NPs) with formula NixZn1- xFe2O4 (x = 0, 0.1, 0.3, 0.4) were synthesized using a microwave-assisted hydrothermal method. We further evaluated the effects of Ni substitution on ... Read more
Creating value from acidogenic biohydrogen fermentation effluents: An innovative approach for a circular bioeconomy that is acquired via a microbial biorefinery-based framework

Author: Sekoai, Patrick T ; Chunilall, Viren ; Ezeokoli, O Date: Jun 2023 As a response to the environmental and societal issues that emanate from the high reliance on fossil fuels, the world is now transitioning toward a circular bioeconomy. Acidogenic biohydrogen production is envisaged as a clean fuel of the ... Read more
A Cytotoxic Bis(1,2,3-triazol-5-ylidene)carbazolide Gold(III) complex targets DNA by partial intercalation

Author: Van der Westhuizen, D ; Slabber, CA ; Fernandes, MA ; Joubert, DF ; Kleinhans, G ; Van der Westhuizen, Carl J ; Stander, A ; Munro, OQ ; Bezuidenhout, DI Date: Jun 2021 The syntheses of bis(triazolium)carbazole precursors and their corresponding coinage metal (Au, Ag) complexes are reported. For alkylated triazolium salts, di- or tetranuclear complexes with bridging ligands were isolated, while the bis(aryl) ... Read more
Dammarane-type triterpenoids with anti-cancer activity from the leaves of Cleome gynandra

Author: Mzondo, Buntubonke ; Dlamini, Nomusa ; Malan, FP ; Labuschagne, Philip W ; Bovilla, VR ; Madhunapantula, SV ; Maharaj, V Date: Jun 2021 Three dammarane-type triterpernoids including two new ones, cleogynones A and B (1 and 2), were isolated from the leaves of Cleome gynandra. The structures of the new triterpenoids were elucidated by spectroscopic data analysis and confirmed ... Read more
Design and development of cellulosic bionanocomposites from forestry waste residues for 3D printing applications

Author: Mathew, Maya J ; Dyanti, Nokuzola ; Mokhena, Teboho C ; Agbakoba, Victor ; Sithole, Bishop B Date: Jun 2021 This paper deals with the development of cellulose nanofibres (CNFs) reinforced biopolymers for use in packaging applications. Cellulose nanofibres were extracted from sawdust by a combination of chemical and mechanical treatments. The extracted ... Read more
Design and testing of an ozonolysis reactor module with on-the-fly ozone degassing under flow conditions

Author: Neyt, Nicole C ; Van der Westhuizen, Johan C ; Panayides, Jenny-Lee ; Riley, DL Date: Mar 2022 Ozonolysis is an attractive, efficient, and green means of introducing oxygen containing functionalities using only oxygen and electricity. Unfortunately, safety issues associated with the accumulation of dissolved ozone and potentially ... Read more
Development of a multiplex HIV/TB diagnostic assay based on the microarray technology

Author: Malatji, Kanyane ; Singh, Advaita A ; Thobakgale, C ; Alexandre, Kabamba Date: Sep 2023 Currently there are diagnostic tests available for human immunodeficiency virus (HIV) and tuberculosis (TB); however, they are still diagnosed separately, which can delay treatment in cases of co-infection. Here we report on a multiplex ... Read more
Development of Bacillus spp. consortium for one-step “Aerobic Nitrification-Denitrification” in a fluidized-bed reactor

Author: Roets-Dlamini, Yrielle ; Lalloo, Rajesh ; Moonsamy, Ghaneshree ; Kumari, S ; Nasr, M ; Ramchuran, Santosh O ; Bux, F Date: Feb 2022 Application of two-step “Autotrophic Nitrification and Anoxic Denitrification” for nutrients removal has found several limitations. This study aimed at isolating indigenous heterotrophic Bacillus strains for chemical oxygen demand (COD), ... Read more
Development of sustainable biobased polymer and bio-nanocomposite materials using nanocellulose obtained from agricultural biomass

Author: Mtibe, Asanda ; Muniyasamy, Sudhakar ; Motaung, TE Date: Jul 2020 Biobased polymer and bio-nanocomposites have provided significant improvement in material science, moving towards the development of green materials to replace petro-based materials. The present study investigated the value-added utilisation ... Read more
Discovery of novel Acetylcholinesterase inhibitors by virtual screening, in vitro screening, and molecular dynamics simulations

Author: Van van der Westhuizen, Johan C ; Stander, A ; Riley, DL ; Panayides, Jenny-Lee Date: Mar 2022 Alzheimer's disease is the most common neurodegenerative disease and currently poses a significant socioeconomic problem. This study describes the uses of computer-aided drug discovery techniques to identify novel inhibitors of acetylcholinesterase, ... Read more
Dissolving wood pulp production: a review

Author: Balkissoon, Simiksha ; Andrew, Jerome E ; Sithole, Bishop B Date: Mar 2022 Studies have elucidated that the trends in dissolving pulp markets worldwide are growing consistently and rapidly. In 2018, the global revenue generated from dissolving pulp amounted to $9.3 billion, this being a 6.50% increase from the ... Read more

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