Author:Tarboton, WRDate:Sep 1977A provisional avifaunal checklist based on observations made during the period September 1974 to July 1976 is presented. Of 325 species recorded, 197 are classified as resident, 64 as migrant, 14 as sporadic, 13 as vagrant while 37 are of ...Read more
Author:Bello, A; Makgopa, K; Fabiane, M; Dodoo-Ahrin, D; Ozoemena, KI; Manyala, NDate:Oct 2013Few-layer graphene was synthesized on a nickel foam template by chemical vapor deposition. The resulting three-dimensional (3D) graphene was loaded with nickel oxide nanostructures using the successive ionic layer adsorption and reaction ...Read more
Author:Maharaj, ADate:Jun 2012The dispersivity of clay soils in water and its influence on the stability of engineered structures has been a topic of serious concern in civil projects for many years. One of the main problems is the difficulty in positively identifying ...Read more
Author:Pretorius, PJ; Linder, PW; Slabbert, JL; Wade, PWDate:Sep 2001Observed mortalities of Daphnia pulex exposed to a single concentration of zinc in different test waters are explained in terms of the chemical behaviour of zinc in solution, as predicted by chemical speciation modelling. Multivariate correlation ...Read more
Author:Nabarro, FRNDate:15 Aug 1997The author provides a brief overview of the chemical driving forces for rafting in superalloys. Until recently, all theories of the driving force for rafting have considered the compositions of the two phases to be fixed, although accepting ...Read more
Author:Musee, NDate:Jan 2012Nanotechnology is envisaged to address present human needs and secure living comforts of future generations cheaply, faster and more cleanly. To date, nanotechnology's impact on the economy and on our daily lives has been enormous.Read more
Author:Nonjola, Patrick NT; Mathe, Mahlanyane K; Hietkamp, SDate:Dec 2008Synthesis and characterization of anion-exchange membranes (AEMs) using polysulfones is described. The modification process of polysulfones involves two steps: Firstly, by introducing chloromethyl groups followed by quaternization reaction ...Read more
Author:Weideman, E; Van der Walt, LTDate:Jan 1978The relative importance of various parameters such as temperature, concentration and treatment time on the chemical softening and bleaching of phormium fibre, has been investigated on a pilot scale.Read more
Author:Weidman, E; Robinson, GADate:Nov 1981Phormium fibre was softened under different conditions and then spun with the aid of two different core yarns on the DREF system.Read more
Author:Weidmann, E; Grabherr, HDate:Aug 1977Phormium tenax fibres have so far only used for the manufacturing of grain bags and affiliated products.Read more
Author:John, Maya J; Anandjiwala, RDDate:Apr 2009This paper presents an experimental study on the static and dynamic mechanical properties of nonwoven based flax fibre reinforced polypropylene composites. The effect of zein modification on flax fibres is also reported. Flax nonwovens were ...Read more
Author:Nonjola, Patrick NT; Mathe, Mahlanyane K; Modibedi, Remegia MDate:Apr 2013Synthesis of quaternary polysulfone/Titanium dioxide (QPSf/TiO2) nanocomposite membranes by the recasting procedure as suitable electrolyte in alkaline fuel cells is described. The composite membranes were characterized by ionic conductivity ...Read more
Author:Manyatshe, Alusani; Balogun, Mohammed O; Nkambule, TTI; Cele, Zamani ED; Msagati, TAMDate:Nov 2020Sugarcane bagasse is the major solid waste product of the sugarcane industry. As a plant-derived biomass, it is an attractive environmentally friendly alternative to petroleum-based materials. Being a non-food agriculture product, its use as ...Read more
Author:van Vuuren, DSDate:Jan 2011This presentation looks at routes to produce titanium, its basic physical properties and main process routes. It concludes that basic physical properties of the relevant chemicals have major effects on the selection of the chemical route to ...Read more
Author:Faleschini, MT; Myer, MS; Harding, N; Fouché, GerdaDate:Mar 2013Sutherlandia frutescens, one of the medicinal plants of southern Africa, has been widely used to boost the immune system by various ethnic groups. This study aims to provide scientific evidence for in vitro immune modulating activities of ...Read more
Author:Thobakgale, Setumo L; Ombinda-Lemboumba, Saturnin; Mthunzi-Kufa, PatienceDate:Aug 2022The increase in demand for pharmaceutical treatments due to pandemic-related illnesses has created a need for improved quality control in drug manufacturing. Understanding the physical, biological, and chemical properties of APIs is an important ...Read more
Author:Motlatle, Abesach M; Kesavan Pillai, Sreejarani; Scriba, Manfred R; Ray, Suprakas SDate:Oct 2016Cu nanoparticles were synthesized using low-temperature aqueous reduction method at pH 3, 5, 7, 9 and 11 in presence of ascorbic acid and polyvinylpyrrolidone. The nanoparticles were characterized using transmission electron microscopy, ...Read more
Author:Arendse, CJ; Malgas, GF; Cummings, FR; Cele, NPDate:Feb 2006Carbon nanotubes (CNTs) have proven to show great promise in a wide variety of applications such as fabrication of strong composites, nano-scale electronic devices, electrochemical devices, power devices, to name a few. This is largely due ...Read more
Author:Mtshali, Thato NDate:Nov 2012Iron is a limiting nutrient in many parts of the oceans, including the unproductive regions of the Southern Ocean. Although the dominant fraction of the marine iron pool occurs in the form of solid-phase particles, its chemical speciation and ...Read more
Author:Mutombo, K; Rossouw, P; Govender, GDate:Jun 2011The as cast Ti6Al4V, obtained after investment casting with yttria stabilized zirconia face-coat, was chemically milled using a mixture of hydrofluoric acid and nitric acid. This process removed completely the alpha-case layer. Lower hardness ...Read more