Author:Rashamuse, KJ; Burton, SG; Cowan, DADate:Nov 2007Isolation and identification of bacterial isolates with specific ferulic acid (FA) esterase activity and cloning of a gene encoding activity. A micro-organism with ethyl ferulate hydrolysing (EFH) activity was isolated by culture enrichment ...Read more
Author:Wen, L; Wang, X; Liu, GQ; Luo, H; Liang, J; Dou, SXDate:Mar 2018With the advancement of electrode materials for lithium-ion batteries (LIBs), it has been recognized that their surface/interface structures are essential to their electrochemical performance. Therefore, the engineering of their surface by ...Read more
Author:Seid, R; Majozi, TDate:Jan 2012This paper presents a mathematical technique for prediction of the optimal number of time points in short-term scheduling of multipurpose batch plants. The mathematical formulation is based on state sequence network (SSN) representation. The ...Read more
Author:Masindi, VhahangweleDate:Apr 2016The present study was developed with the aim of beneficiating two waste materials by converting them into a resource. Magnesite tailings, which is the by-product of magnesite mining, was used to remediate acid mine drainage (AMD) which is the ...Read more
Author:Nabarro, FRN; Wilsdorf, DKDate:Dec 1996The internal stresses induced by the strain gradients in an array of lattice cells delineated by low-angle dislocation boundaries are partially relieved by the creation of new low-angle boundaries. This is shown to be a first-order transition, ...Read more
Author:Loveday, Philip WDate:Mar 2006Guided wave ultrasonic inspection is becoming an important method of non-destructive testing for long, slender structures such as pipes and rails. Often it is desirable to use transducers that can strongly excite a specific mode of wave ...Read more
Author:Van de Steen, B; Vervoort, A; Napier, JALDate:Mar 2001A two-dimensional boundary element code, based on the displacement discontinuity method is used to simulate a confined compression test. The method takes account of the granular nature of the rock and of the presence of pre-existing defects. ...Read more
Author:Van den Heever, SC; D'Abreton, PC; Tyson, PDDate:Aug 1997Tropical-temperate troughs and their associated cloud bands have been modelled over southern Africa using the Regional Atmospheric Modelling System (RAMS). The correspondence between simulated fields and observational data for both the dry, ...Read more
Author:Haarhoff, LJ; Kok, S; Wilke, DNDate:Apr 2013Kriging is used extensively as a metamodel in multidisciplinary design optimization. The correlation matrix used in Kriging metamodeling frequently becomes ill-conditioned. Therefore different numerical methods used to solve the Kriging ...Read more
Author:Lysko, Albert A; Johnson, DDate:Jul 2008The present layout of the indoor wireless mesh network test-bed build at the Meraka Institute is introduced. This is followed by a description of a numerical electromagnetic model for the complete test-bed, including the coupling and diffraction ...Read more
Author:Long, Craig S; Loveday, Philip W; Ramatlo, Dineo AM; Andhavarapu, EVDate:Sep 2018Numerical verification of a method to simulate piezoelectric transducers exciting infinite elastic waveguides is presented. The method, referred to as SAFE-3D, combines a 3D finite element (FE) model of a transducer with a 2D semi-analytical ...Read more
Author:Scogings, PF; Hjalten, J; Skarpe, C; Hattas, D; Zobolo, A; Dziba, L; Rooke, TDate:Jan 2014Carbon-based secondary metabolites (CBSMs) such as tannins are assumed to function as plant defences against herbivores. CBSMs are thought to be inversely related to growth rate and nutrient concentrations because a physiological trade-off ...Read more
Author:Lemley, DA; Taljaard, Susan; Adams, JB; Strydom, NDate:Oct 2014This study provides an overview of the nutrient status of river inflow into the estuaries within the Gouritz Water Management Area (WMA) of South Africa. Riverine inputs are a major source of macronutrients to estuaries and the adjacent coastal ...Read more
Author:Wehmeyer, ASDate:17 Dec 1966The nutrient content of 9 species of wild fruits growing in the Transvaal was determined in the laboratory were the research was conducted. In order to simplify the removal of the flesh from the stones, the fruits were in most cases freeze-dried ...Read more
Author:Adams, JB; Taljaard, Susan; Van Niekerk, Lara; Lemley, DADate:Feb 2020Nutrient pollution in South African estuaries is described using a Driver-Pressure-State-Impact-Response framework. The root cause (‘driver’) of deteriorating water quality is rapid population growth that leads to increasing inputs from ...Read more
Author:Symes, CT; McKechnie, AE; Nicolson, SW; Woodborne, SMDate:2010The winter-flowering succulent Aloe marlothii provides nectar for many opportunisticavian nectarivores in southern African savannas. We assessed the importance of A. marlothii nectar sugar for opportunistic nectarivores by analysing temporal ...Read more
Author:Dreyer, JJ; Wehmeyer, ASDate:Jan 1982The use of the caterpillar of the Mopanie moth (Conimbrasia belina) as a food by the Pedi nation has been described in detail by Quin, who also recorded data on the average weight and moisture, protein and fat contents of the fresh caterpillars. ...Read more