Author:Maree, JP; Greben, HA; De Beer, MorrisDate:Apr 2004A novel chemical/biological process is described in which sulphate and sulphide are removed simultaneously during biological treatment. Partial sulphate removal is achieved during chemical pre-treatment. In the biological stage sulphate is ...Read more
Author:Turner, P; Murphy, RJDate:Aug 1995Several factors which influence the treatment of timber products with vapour phase preservatives such as borate esters are considered. Gas flow rate through the substrate was found to be a significant factor limiting both preservative penetration ...Read more
Author:Turner, P; Murphy, RJDate:Mar 1998This paper forms a continuation of the work on treatment of timber products with gaseous borate esters. Turner and Murphy (1995) in an earlier paper indicated that gas flow rate into the wood substrate was the principle factor limiting the ...Read more
Author:Malise, TTA; Nweke, EE; Takundwa, Mutsa M; Fru, PF; Thimiri Govindaraj, Deepak BDate:May 2023In the past few years, development of approved drug candidates has improved the disease management of multiple myeloma (MM). However, due to drug resistance, some of the patients do not respond positively, while some of the patients acquire ...Read more
Author:Schoeman, JJ; Steyn, A; Scurr, PJDate:Sep 1996Reverse osmosis (RO) and physical/chemical technology were evaluated for treatment of neutralized spent acid effluent (seepage) containing high concentration levels of TDS (7500mg/l), Ca (400 mg/l), Cr-V1 (42 mg/l), nitrate-nitrogen (827 ...Read more
Author:Staver, AC; Archibald, S; Levin, SDate:2011Savannas are known as ecosystems with tree cover below climate-defined equilibrium values. However, a predictive framework for understanding constraints on tree cover is lacking. The authors present a) a spatially extensive analysis of tree ...Read more
Author:Gondwe, MFK; Geldenhuys, CJ; Chirwa, PWC; Assédé, ESP; Cho, Moses ADate:Nov 2020Comparative information on the composition and diversity in tree species associations in Miombo woodland is limited. This study assessed how tree species associations across forest reserves of Miombo woodland in Malawi varied in composition ...Read more
Author:Scholes, RJ; Archer, SRDate:1997Savannas occur where trees and grasses interact to create a biome that is neither grassland nor forest. Woody and gramineous plants interact by many mechanisms, some negative (competition) and some positive (facilitation). The strength and ...Read more
Author:Masekoameng, KE; Leaner, J; Dabrowski, James MDate:Aug 2010Recent studies suggest an increase in mercury (Hg) emissions to the global environment, particularly as a result of anthropogenic activities. This has prompted many countries to complete Hg emission inventories, based on country-specific Hg ...Read more
Author:Scholes, RJ; Dowty, PR; Caylor, K; Parsons, DAB; Frost, PGH; Shugart, HHDate:Jun 2002The Kalahari sand sheet occupies 2.5 million ha in southern Africa. It is an area with relatively similar deep Aeolian soils, and a strong south to north gradient in rainfall, from 200 to 1000 mm mean annual precipitation (MAP) in the region ...Read more
Author:Eckhardt, HC; Van Wilgen, BW; Biggs, HDate:Jun 2000South Africa’s Kruger National Park is one of the largest conservation areas in Africa. In 1940, 1974 and 1998 changes in the cover and density of shrubs and trees were assessed from aerial photographs, and in 1984 and 1996 fixed-point ...Read more
Author:Hattingh, J; Maree, GA; Ashton, PJ; Leaner, JJ; Turton, ARDate:2007The International Symposium on Ecosystem Governance held in South Africa during 2005 enabled scientists from several disciplines to debate issues relating to governance. The symposium provided an opportunity to explore the concept of governance, ...Read more
Author:Nzuza, P; Ramoelo, Abel; Odindi, J; Mwenge Kahinda, Jean-Marc; Lindeque, LDate:Nov 2021Land degradation is a complex environmental problem that requires robust decision-making processes that embrace diversity of local indigenous knowledge. Participatory approaches are essential in capturing the complexity in land degradation ...Read more
Author:Nzuza, P; Ramoelo, Abel; Odindi, J; Mwenge Kahinda, Jean-Marc; Lindeque, LDate:Nov 2021Land degradation is a complex environmental problem that requires robust decision-making processes that embrace diversity of local indigenous knowledge. Participatory approaches are essential in capturing the complexity in land degradation ...Read more
Author:Malatji, N; Popoola, API; Lengopeng, T; Pityana, Sisa LDate:Feb 2020High entropy alloys (HEAs) are new class of materials with a high potential to find use in structural applications where high corrosion and wear resistance are required. Their high configurational entropy, sluggish diffusion, cocktail effect ...Read more
Author:Malherbe, Johan; Engelbrecht, FA; Landman, WA; Engelbrecht, CJDate:Mar 2011The study provides perspective on the contribution of landfalling tropical systems (cyclones, depressions, storms and lows) from the southwest Indian Ocean (SWIO) towards rainfall over the eastern interior of southern Africa, over the period ...Read more
Author:Sivakumar, V; Bencherif, H; Begue, N; Thompson, AMDate:Jul 2011In this paper, tropopause characteristics observed from tropical to subtropical Southern Hemisphere stations using Southern Hemisphere Additional Ozonesonde (SHADOZ) data are presented for the 11-yr period of 1998–2008. Three different ...Read more
Author:Ntshabele, K; Isong, B; Gasela, N; Abu-Mahfouz, Adnan MIDate:Sep 2022The traditional Long-Range Wide-Area Network (LoRaWAN) uses an Advanced Encryption Standard (AES) 128 bit symmetric key to secure entities and data against several attacks. However, due to the existence of heterogeneous applications, designing ...Read more