Author:Moodley, Sanchia S; Dlamini, Nomusa R; Steenkamp, Lucia H; Buys, Elna MDate:Nov 2019Spontaneous fermentation of motoho, a southern African non-alcoholic sorghum beverage, results in products with inconsistent microbiological and sensory quality. We aimed to identify the microorganisms involved in the fermentation of motoho ...Read more
Author:Ndlela, Luyanda L; Oberholster, Paul J; Van Wyk, JH; Cheng, Po Hsun HDate:Dec 2018Biological control of cyanobacteria is a well-researched area with a central focus on laboratory-scale studies. Numerous reports have been made on algicidal isolates, with bacteria as a major component of the antagonists. The research in this ...Read more
Author:Bumunang, EW; Babalola, OO; Barros, EDate:2013This study examined the impact of genetically modified corn on bacterial functional community in the rhizosphere. Rhizospheric soil samples from GM and non-GM corn were collected at 30 days after sowing (DAS) and at post-harvest from two ...Read more
Author:Chhiba, Varsha P; Van der Westhuyzen, Christiaan W; Bode, M; Brady, DDate:Jun 2019Commercially, nitrilases are valuable biocatalysts capable of converting a diverse range of nitriles to carboxylic acids for the greener synthesis of chemicals and pharmaceuticals. Nitrilases are widespread in nature and are both important ...Read more
Author:Meth-Cohn, O; Horak, RM; Fouché, GerdaDate:07 Jun 1994Alpha beta-Epoxy ketones on treatment with baker's yeast yield different types of products depending on their substitution. Small groups such as H or Me attached at the epoxy end protect that end from attack. Thus, 1-acyl epoxides with H, ...Read more
Author:Bolokang, AS; Phasha, MJ; Motaung, DEDate:Apr 2013Broadening and height reduction of X-ray diffraction peaks were observed after cold-pressing of unmilled Co-W pow- der mixture. It seems the effect of cold pressing has slightly reduced the lattice parameter of W from 3.165 to 3.143 Å. ...Read more
Author:Strydom, Wilma FDate:Sep 2018A small percentage of South Africans regularly recycle most of their recyclables, which was only 4% and 7.2% in 2010 and 2015, respectively. This empirical quantitative study, the first study on this scale in South Africa, aimed to ascertain ...Read more
Author:Walters, Chavon R; Couto, M; McClurg, N; Silwana, B; Somerset, VDate:Feb 2017Mercury (Hg) speciation and bioavailability were studied in surface water, surface sediment and freshwater fish samples collected upstream and downstream of the Medupi (currently under construction) and Matimba power stations in the Waterberg ...Read more
Author:Parmaliana, A; Frusteri, F; Mezzapica, A; Miceli, D; Scurrell, MS; Giordano, NDate:Sep 1993The partial oxidation of methane to formaldehyde by molecular oxygen on silica and silica-supported oxide catalysts has been investigated at a pressure of 1.7 bars in the temperature range 520-650°C by using a batch reactor with external ...Read more
Author:Rosman, Benjamin S; Hawasly, M; Ramamoorthy, SDate:Feb 2016A long-lived autonomous agent should be able to respond online to novel instances of tasks from a familiar domain. Acting online requires `fast' responses, in terms of rapid convergence, especially when the task instance has a short duration ...Read morecb
Author:Kim, S; Das, Sonali; Chen, M-H; Warren, NDate:Mar 2008Motivated by a large multilevel survey conducted by the US Veterans Health Administration (VHA), we propose a structural equations model which involves a set of latent variables to capture dependence between different responses, a set of ...Read more
Author:Kim, S; Das, Sonali; Chen, M-H; Warren, NDate:Jan 2009Structural equations models (SEMs) have been extensively used to model survey data arising in the fields of sociology, psychology, health, and economics with increasing applications where self assessment questionnaires are the means to collect ...Read more
Author:Mokilane, P.M.; Debba, Pravesh; Venkata, Y.S.S.; Sigauke, CDate:Mar 2019The paper presents an application of Bayesian structural time-series model to forecast long-term electricity demand. Accurate trend specification in long-term forecasting is important; otherwise erroneous forecasts could be obtained especially ...Read more
Author:Litvin, Igor A; King, Gary R; Strauss, Hencharl JDate:Jun 2017We propose a novel intra-cavity laser beam shaping technique based on the manipulation of the transverse gain profile in the laser crystal. The method allows controllable reshaping of a laser output beam into a desired beam profile. Two laser ...Read more
Author:Schulze, C; Flamm, D; Duparré, M; Forbes, ADate:Nov 2012We present a fast and easy technique for measuring the beam propagation ratio, M2, of laser beams using a spatial light modulator. Our technique is based on digitally simulating the free-space propagation of light, thus eliminating the need ...Read more
Author:Berger, DK; Oelofse, D; Arendse, MS; Du Plessis, E; Dubery, IADate:Jul 2000Stenocarpella maydis, a fungal pathogen of maize, produced polygalacturonases (PGs) when grown on pectin or maize cell walls. An extract from bean (Phaseolus vulgaris L.) which contained an active inhibitor of Aspergillus niger PG, also ...Read more
Author:Dickens, J; Swart, HDate:Nov 2015Mobile robotics has a wide range of applications resulting in a diverse array of designs including a variety of sensors and manipulators. The task of integrating the variety of components that make up a typical robotic system takes significant ...Read more
Author:Litvin, IADate:Jun 2012In this work we investigate the behavior of the instantaneous Poynting vector of symmetrical paraxial laser beams, namely the modification of the instantaneous Poynting vector and the radiation pattern during propagation in free space for a ...Read more