Author:Lotter, J; Botes, AL; Dyk, MS; Breytenbach, JCDate:Aug 2004Kinetic resolution of the enantiomers of trans-1-phenylpropene oxide and (2,3-epoxypropyl)benzene was achieved by yeasts from the genus Rhodotorula. The resolution of trans-1-phenylpropene oxide by Rhodotorula glutinis UOFS Y-0123 yielded ...Read more
Author:Jonker Klunne, WDate:Oct 2012Hydropower is currently the most common source of renewable energy, accounting for more than 3,400 terawatts, or about 16 percent of global electricity production, in 2010. As hydropower uses a fuel—water from the hydrologic cycle—that is not ...Read more
Author:Barrass, GDate:1978A method utilising the "hot-rod" reactor has been employed to study the hydropyrolysis characteristics of a selection of South African coals. The effects of various operating parameters involved in this process have been investigated such as ...Read more
Author:Gitari, MW; Petrik, LF; Musyoka, Nicholas MDate:Aug 2016South African coal combustion power utilities generate huge amounts of coal fly ash that can be beneficiated into zeolitic products. This chapter reports on the optimization of the presynthesis and synthesis conditions for a pure-phase zeolite ...Read more
Author:Sikhwivhilu, LM; Mpelane, S; Moloto, N; Ray, Suprakas SDate:Jan 2010The influence of the method of synthesis in the properties of the tubular structures derived from TiO2 was investigated using XRD, SEM and BET analysis. The use of microwave irradiation resulted in the formation of TiO2 tubes comprising anatase ...Read more
Author:Barrass, G; Davidtz, JC; Gray, D; Jezko, J; Kershaw, JR; Meinjes, AADate:1977The +300 degrees Celsius boiling fraction of a coal-derived liquid produced by direct dry non-catalytic hydrogenation of Sigma coal was hydrotreated in the presence of a tailored Ni/W oxide on a synthetic layered silicate catalyst.Read more
Author:Makgwane, Peter R; Ray, SSDate:Mar 2015A highly active and magnetically recyclable nanostructured copper–iron oxide (CuFe) catalyst has been synthesized for hydroxylation of benzene to phenol under mild reaction conditions. The obtained catalytic results were correlated with the ...Read more
Author:Berman, Robert J; Rosman, Benjamin S; Van Niekerk, B; Nordengen, Paul ADate:Oct 2018The ever increasing global freight task brings with it a number of challenges for road freight transportation. The combination of high-capacity vehicles and Performance-based Standards (PBS) is proving to be a viable and sustainable option ...Read more
Author:Berman, Robert J; Benade, R; Rosman, Benjamin S; Nordengen, Paul ADate:Nov 2016This paper presents a data driven approach to develop a prediction model for the PBS performance of heavy vehicles. A gap exists between trailer manufacturers who create PBS vehicle designs and the PBS assessors who evaluate the performance ...Read more
Author:Cho, Moses A; Skidmore, AKDate:Jan 2009The research objective was to determine robust hyperspectral predictors for monitoring grass/herbs biomass production on a yearly basis in the Majella National Park, italy. Hymap images were over the study area on 15 July 2004 and 4 July 2005. ...Read more
Author:Newete, SW; Erasmus, BFN; Weiersbye, IM; Cho, Moses A; Byrne, MJDate:2014Spectral signatures of water hyacinth grown with biocontrol agents (Neochetina eichornia and N. bruchi) and various heavy metal pollutants were collected at the plant canopy level using a hand-held spectrometer to detect biocontrol agent and ...Read more
Author:Landman, WA; Engelbrecht, F; Landman, SDate:Oct 2010In order to produce a weather forecast, the initial state of the atmosphere needs to be entered into the forecast model taking into account factors such as temperature, wind and moisture. However, the scale of some atmospheric motions is far ...Read more
Author:MacPhail, C; Campbell, CDate:Jun 2001Levels of heterosexually transmitted HIV infection are high amongst South African youth, with one recent survey reporting levels of 18.9% amongst 17-20 year olds and 43.1% amongst 21-25 year olds. In these groups levels of knowledge about HIV ...Read more
Author:Manus, N; Wall, K; Moodley, KDate:Aug 2008This paper describes the steady progress that the South African department of Water Affairs and Forestry (DWAF) has been making with formulating a national water services infrastructure asset management (IAM) strategy. A "scan" of the state ...Read more