Author:Debba, Pravesh; Carranza, EJM; Stein, A; Van der Meer, FDDate:Aug 2009This research discusses a novice method for sampling geochemicals to characterize mine tailings. Researchers model the spatial relationships between a multi-element signature and abundance estimates of secondary iron-bearing minerals in mine ...Read more
Author:Gopal, Ajith K; Adali, S; Verijenko, VEDate:Jan 2000Manufacturing of polymer composites using a curing process requires the specification of the temperature as a function of time, i.e., the temperature profile. It is of utmost importance that the selected profile satisfies a number of criteria ...Read more
Author:Botha, JDM; Dala, L; Schaber, SDate:Sep 2014A novel concept (referred to as the flap extension) is implemented on the leading edge of the flap of a three element high lift device. The concept is optimised using two optimisation approaches based on Genetic Algorithm optimisations. A ...Read more
Author:Botha, JDM; Dala, L; Schaber, SDate:2015This study aimed to observe the effect of a novel concept (referred to as the flap extension) implemented on the leading edge of the flap of a three element high lift device. The high lift device, consisting of a flap, main element and slat ...Read more
Author:Mema, V; Hlabela, Simon P; Marx, S; Rust, CDate:Aug 2015Energy intensive technology, such as activated sludge plants, is fast becoming a high-cost item of municipal budgets amidst the rising electricity tariffs and vulnerable demand-supply dynamics in South Africa. The introduction of anaerobic ...Read more
Author:Bergh, J; Snedden, Glen C; Meyer, CDate:Jun 2012Non-axisymmetric end wall contouring has become an established method for the reduction of the losses associated with secondary flow. To date, the majority of designs have been produced by the aeroengine manufacturing community and as a result ...Read more
Author:Tile, N; Roro, Kittessa T; Forbes, ADate:May 2011The demand for low cost, efficient and environmental friendly energy is increasing rapidly. Solar thermal energy is being widely investigated as a solution. Efficient thermal solar collectors require a spectrally selective material capable ...Read more
Author:Barnard, A; Kotzé-Jacobs, L; Moolman, SDate:May 2011The use of biodegradable polymers in temporary surgical and pharmacological applications has become a prominent part of polymer research. Poly(e-caprolactone) (PCL) is widely studied for tissue engineering applications due to its relatively ...Read more
Author:Steenkamp, Lucia H; Brady, DDate:Dec 2008Although the enantioselective kinetic resolution of ester racemates of the non-steroidal antiinflammatory drug naproxen ([2-(6-methoxy-2-naphthyl) propionic acid]) is a common demonstration for biocatalysis, the enantiomeric excess of the ...Read more
Author:Tesfaye, T; Sithole, Bishop B; Ramjugernath, D; Ndlela, Luyanda LDate:Feb 2018Commercially processed, untreated chicken feathers are biologically hazardous due to the presence of blood-borne pathogens. Prior to valorisation, it is crucial that they are decontaminated to remove the microbial contamination. The present ...Read more
Author:Yeates, CA; Smit, MS; Botes, AL; Breytenbach, JC; Krieg, HMDate:Jan 2007Various studies have described the optimisation of the hydrolysis of epoxides through epoxide hydrolase, however, far fewer have investigated the specific application of whole cells containing the enzyme. For this reason the enantioselective ...Read more
Author:Brady, D; Steenkamp, Lucia H; Skein, E; Chaplin, JA; Reddy, SDate:04 Mar 2004In a biocatalytic reaction the immobilized lipase ChiroCLEC-CR enantioselectively hydrolysed a naproxen ethyl ester racemate, yielding (S)-naproxen with an enantiomeric excess of more than 98%, an enantiomeric ratio (E) of more than 100, and ...Read more
Author:Broughton, BA; Heise, RDate:Oct 2008A variable stability, blended-wing-body research mini-UAV was developed at the CSIR in South Africa. The purpose of the UAV was to study some of the aerodynamic design and control issues associated with flying wing geometries and to develop ...Read more
Author:Masuku, EP; Moller, H; Knutsen, R; Ivanchev, L; Govender, GDate:Jun 2009The traditional solution treatment cycles that are currently applied to rheo-processed A201 are mostly those that are used for conventional castings. These solution treatments are not necessarily the optimum solution treatments for rheo-processing. ...Read more
Author:Moller, H; Govender, G; Stumpf, WEDate:Nov 2007The heat treatment cycles that are currently applied to processed components are mostly those that are in use for traditional dendritic alloys. These heat treatments are not necessarily the optimum heat treatments for SSM processing. The T6 ...Read more
Author:Masina, Bathusile N; Lafane, S; Wu, Lorinda; Abdelli-Messaci, S; Kerdja, T; Forbes, ADate:Feb 2014Fast imaging plasma plume study have been carried out on vanadium-oxygen plasma generated using 248 nm, 25 ns pulses from an excimer KrF laser under oxygen atmosphere. The plume expansion dynamics of an ablated VO(sub2) target was investigated ...Read more
Author:Maweni, Thabisa; Setati, Tiro; Botha, NatashaDate:Nov 2023Inventory management in warehouses is a crucial task in the logistics industry. Manual stocktaking in larger-scale warehouses can be time-consuming and labour-intensive. To automate this process, unmanned aerial vehicles (UAVs) have gained ...Read more
Author:Szewczuk, S; Roux, SP; Lindeque, M; Germanis, JDate:01 Sep 2010Municipal waste water, or sewage, is a combination of domestic and industrial effluent. The increasing volume of sewage due to urbanisation and economic growth places pressure on the treatment performance of existing waste treatment systems. ...Read more
Author:Gamedze, NF; Zwane, PE; Hunter, LawranceDate:Apr 2018The increasing global awareness of ecofriendly and sustainable production and products has encouraged the use of natural fibres and dyes. Although research has been undertaken on the sources and applications of natural dyes, only a few such ...Read more
Author:Duvenhage, DF; Brent, AC; Stafford, William HL; Van Den Heever, DDate:Jun 2020Renewable Energy Technologies are rapidly gaining uptake in South Africa, already having more than 3900 MW operational wind, solar PV, Concentrating Solar Power (CSP) and biogas capacity. CSP has the potential to become a leading Renewable ...Read more