Author:Van Rensburg, NJJDate:Jun 1975Some factors affecting the shrinkresist treatment of wool by chlorination followed by a treatment with a polyamide epichlorohydrin (PAE)-polyacrylate dispersion were studied.Read more
Author:Mokoena, Refiloe; Mvelase, Gculisile MDate:Oct 2019The study presented in this paper aims to promote the use of coal ash in railway infrastructure as a more economical and sustainable material. The study serves as a preliminary investigation on using coal ash as one of the structural layers ...Read more
Author:Deadman, AJ; Behnert, ID; Fox, NP; Griffith, DDate:Jul 2011This paper presents the results of the laboratory and field based reflectance panel and radiometer comparisons that took place as part of the CEOS 2010 Key comparison of “techniques and instruments used for the vicarious calibration of Land ...Read more
Author:George, Theresa B; Anochie-Boateng, Joseph; Jenkins, KJDate:Sep 2020In South Africa research is currently under way to determine the suitability of using locally available recycled crushed glass as a partial fine aggregate substitute in the production of asphalt mixes. This paper characterises the laboratory ...Read more
Author:Du Plessis, JAKDate:1965During the long history of research on methane and coal dust explosions in the coal mining countries, test procedures and equipment for evaluating the explosibility of dusts were developed that can be regarded as "standard" today.Read more
Author:Botha, C; Roberts, MBDate:Aug 1975A relatively simple technique has been devised whereby wool may be satisfactorily dyed with reactive dyes from an aqueous charged perchloroethylene system.Read more
Author:Mozes, TE; Van Rensburg, NJJ; Turpie, DWFDate:Dec 1981A laboratory study of the use of twenty nonionic detergents for scouring of raw wool showed that scouring efficiency decreased with an increase in the detergent partition coefficient obtained by centrifuging of artificial creams prepared with ...Read more
Author:Paige-Green, P; Leyland, R; Maharaj, ADate:Aug 2010The development of stiffness of stabilized materials with time is critical to the construction process, particularly in the case of recycling, where traffic is often required to return to the recycled road soon after construction. However, ...Read more
Author:Theron, BertusDate:Apr 2013The purpose of the workshop was for participants to interactively discuss (with regard to optical imaging or optical imaging systems): Local end-user needs; What those needs imply for associated new & existing laboratory testing & measurement ...Read more
Author:Paige-Green, P; Hongve, J; Sampson, L; Cassiem, IDate:Sep 2004The primary objective of the study discussed in this paper was to assess the different alternatives to the provision and maintenance of a good gravel wearing course, in financial and economic terms as well as suitability for labour-based ...Read more
Author:Dlamini, N; Mapiravana, JosephDate:Sep 2011For this workshop, members of the Regional research alliance (RRA) and delegates from the construction industry were invited to present ideas and contribute towards the implementation of Ultrathin Concrete road pavements. Dr. Joe Mapiravana ...Read more
Author:Wellington, Kevin W; Kolesnikova, NIDate:May 2012Nuclear monoamination of a 1,4-naphthohydroquinone with primary aromatic amines was catalysed by the commercial laccase, Novozym 51003, from Novozymes to afford aminonaphthoquinones. The synthesis was accomplished by reacting a mixture of the ...Read more
Author:Wellington, Kevin W; Govindjee, Varsha P; Steenkamp, PaulDate:Dec 2018A commercial laccase, Suberase from Novozymes, catalyses the synthesis of triaminated cyclohexa-2,4-dienones and a methylbenzene-1,2-diol derivative. The primary amine (analine) and the catechol was reacted under mild conditions (40C) in a ...Read more
Author:Wellington, Kevin W; Gordon, GER; Ndlovu, LA; Steenkamp, PDate:Jun 2013Oxidative C-S and C-C bond formation with aryl and alkyl thiols was catalyzed under mild conditions in a reaction vessel open to air at pH 4.5 in the presence of a commercial laccase (Novozym 51003 or Suberase) and a cosolvent (DMF) to afford ...Read more
Author:Trichili, A; Mhlanga, T; Naidoo, Darryl; Dudely, A; Zghal, M; Forbes, ADate:17 Aug 2014We analyze the effect of atmospheric turbulence on the propagation of multiplexed Laguerre Gaussian modes. We present a method to multiplex Laguerre Gaussian modes using digital holograms and decompose the resulting field after encountering ...Read more
Author:Sibisi, TH; Shongwe, MB; Tshabalala, Lerato C; Mathoho, IpfiDate:Aug 2023A cutting-edge manufacturing technology that uses powder or wire as the feeding material and a high-energy heating source is known as metal additive manufacturing (AM). High-performance components for automotive, aerospace, medical, and energy ...Read more
Author:Audouin, Michelle ADate:Jan 2007Unsustainable agricultural practices have had a role to play in the degradation of land on which agriculture depends. South Africa has an international obligation to develop a National Action Programme (NAP), the purpose of which is to identify ...Read more
Author:Von Maltitz, Graham P; Van der Merwe, Martina RDate:Apr 2017The Southern African region, from a purely biophysical perspective, has huge potential for biofuel production, especially in Mozambique and Zambia. Although many of the soils are sandy and acidic, with careful management and correct fertilization, ...Read more
Author:Napier, MarkDate:Oct 2013Most people living in cities in Africa live outside of the legal system, without clear rights to the land they occupy. These pieces of land make up the so-called slums which surround and permeate most growing cities, and which are home to ...Read more