Author:Langmi, Henrietta WDate:Aug 2018The lack of safe, reliable and efficient hydrogen storage systems remains one of the key obstacles to the hydrogen economy. Amide-hydride systems are a promising class of hydrogen storage materials particularly for vehicular applications. ...Read more
Author:Schep, RADate:1974Low rank coals are hydrogenated and solubilized more effectively and more rapidly by a mixture of carbon monoxide and water than hydrogen. The purpose of this memorandum is to present the information presently available on the aforementioned process.Read more
Author:Van Wyk, I; Roychoudhury, AN; Maherry, A; Genthe, BettinaDate:2012Kamiesberg, located in the semi-arid regions of South Africa, depends primarily on subsurface water resources for domestic, agricultural and industrial use. In order to assess geochemical evolution of groundwater and to identify salinization, ...Read more
Author:Hobbs, PJ; Cobbing, JEDate:Aug 2007The comparatively short history of acid mine drainage (AMD) in the West Rand Basin (WRB) via mine water decant on the Randfontein Operations property (formerly Randfontein Estates Ltd) of Harmony Gold Mining Company west of Krugersdorp (Figure ...Read more
Author:Hobbs, Philip J; De Meillon, NDate:Sep 2017A water level rise of almost 3 m in the space of two years in the Sterkfontein Cave system since late-2009 necessitated the re-routing of the tourist path through the cave to successively higher elevations on three occasions. It also raisedconcern ...Read more
Author:Xu, Y; Titus, R; Holness, SD; Zhang, J; Van Tonder, GJDate:Oct 2002In South Africa, the flow requirements for maintaining the normal functioning of aquatic ecosystems is termed the “ecological reserve” and these should be determined when a licence application for water allocation is processed. Determination ...Read more
Author:Mwenge Kahinda, Jean-Marc; Kapangaziwiri, EvisonDate:Oct 2012Hydrological modelling of the Zambezi River
Basin will inform the development and formulation of appropriate management
strategies to ensure and maintain
environmental flow requirements.Read more
Author:Scott, DFDate:Oct 1993Stream flow and its storm-flow elements in four catchments were analyzed by the paired catchment method for a response to fire. Prior to burning two of the catchments were vegetated with over-mature fynbos (the indigenous scrub vegetation of ...Read more
Author:Rebelo, AJ; Le Maitre, David C; Esler, KJ; Cowling, RMDate:Nov 2015Valley-bottom wetlands are valuable assets as they provide many ecosystem services to mankind. Despite their value, valley-bottom wetlands are often exploited and land-use/land-cover (LULC) change results in trade-offs in ecosystem services. ...Read more
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