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Browsing by UP Author "Focke, Walter Wilhelm"
Now showing items 21-40 of 140
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Atanasova, Maria T.; Vyalikh, Anastasia; Scheler, Ulrich; Focke, Walter Wilhelm (Elsevier, 2016-06)Three rectorite samples from the Beatrix Gold Mine, South Africa were characterized. Scanning electron microscopy revealed a layered morphology. High resolution transmission microscopy showed well distinguished light and ...
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Muiambo, Herminio Francisco; Focke, Walter Wilhelm; Atanasova, Maria Todorova; Benhamida, Aida (Elsevier, 2015-03)Replacing the exchangeable interlayer ions in Palabora vermiculite with magnesium, aluminumor iron (III) ions does not affect the exfoliation onset temperature (456± 11 °C). However, co-intercalation of minor amounts ...
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Merckel, Ryan David; Focke, Walter Wilhelm; Sibanda, Mthokozisi Mayibongwe; Massinga, Pedro Horacio; Crowther, N.A.S. (Nicolaas Andries Sadie), 1944- (Routledge, 2012-02)WHO-approved insecticides were co-intercalated with hexadecyl-trimethylammonium (HDTMA) chloride in bentonite in an attempt to improve their persistence. XRD and FTIR confirmed successful co-intercalation of the insecticides. ...
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Jiba, Zetu; Focke, Walter Wilhelm; Kalombo, Lonji; Madito, M.J. (Moshawe) (KeAi Communications, 2020-04)This research aims to contribute to the safe methodology for additive manufacturing (AM) of energetic materials. Coating formulation processes were investigated and evaluated to find a suitable method that may enable ...
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Badenhorst, Heinrich; Focke, Walter Wilhelm (Elsevier, 2013-11)Two unidentified powdered graphite samples, from a natural and a synthetic origin respectively, were examined. These materials are intended for use in nuclear applications, but have an unknown treatment history since ...
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Tichapondwa, Shepherd Masimba; Focke, Walter Wilhelm; Gisby, John; Del Fabbro, Olinto; Kelly, Cheryl (Taylor and Francis, 2016-07)Slow burning Si-BaSO4 pyrotechnic delay compositions are employed commercially for intermediate to long time delays. However, there is very little information on this composition available in open literature. The reactivity ...
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Joseph, Susan; Focke, Walter Wilhelm; Thomas, Sabu (Brill, 2010)The morphology of blends of poly(acrylonitrile-co-butadiene-co-styrene) (ABS) and poly(ethylene terephthalate glycol) (PET-G) has been investigated with special reference to the effect of blend ratio and compatibilization. ...
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Sungkapreechaa, Chanita; Focke, Walter Wilhelm; Androsch, Rene (Springer, 2020-02)Liquid-liquid (L-L) de-mixing and vitrification of solutions of either crystallizable poly(L-lactic acid) (PLLA) or non-crystallizable poly(D/L-lactic acid) (PDLLA) with 50 m% N, N-diethyl-3-methylbenzamide (DEET) were ...
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Kruger, Hermanus Joachim; Focke, Walter Wilhelm; Mhike, Washington; Taute, A.T. (Albertus); Roberson, Albert; Ofosu, Osei (Sage, 2014-06)Polyethylene was flame retarded with two intumescent-type additives, 3,5-diaminobenzoic acid phosphate and ethylenediamine phosphate, which differ with respect to their decomposition onset temperatures, along with varying ...
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Pretorius, Franco; Dzingai, Pethile; Du Toit, Elizabeth Louisa; Focke, Walter Wilhelm (Elsevier, 2024-03)Physical property data obtained for binary mixtures are conventionally fitted in excess form using the Redlich-Kister equation. The ternary data is then estimated using projections of the binary behaviour on the basis of ...
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Dzingai, Pethile; Pretorius, Franco; Focke, Walter Wilhelm (Elsevier, 2024-02)Please read abstract in the article.
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Moyo, Lumbidzani; Nhlapo, N.S. (Nontete Suzan); Focke, Walter Wilhelm (Springer, 2008-08)Anionic surfactant intercalated layered double hydroxides (LDH) of high purity are easily prepared via direct coprecipitation and also by the ion exchange method provided that the precursor contains a monovalent anion, ...
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Atanasova, Maria Todorova; Strydom, Andre M.; Schutte, Casper Jan Hendrik; Prinsloo, Linda Charlotta; Focke, Walter Wilhelm (Springer, 2014-05)The crystal structure of a copper antimonite (CuSb2O4) was determined from X-ray powder diffraction data. The structure was solved by simulated annealing in direct space using the Rietveld method. The compound crystallizes ...
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Jariyavidyanont, Katalee; Patanair, Bindu; Focke, Walter Wilhelm; Androsch, René (Springer, 2016-07)The crystallization kinetics of polyamide 11 (PA 11) in presence of sepiolite and organomodified montmorillonite nanofillers has been studied in a wide range of temperatures and cooling rates by conventional differential ...
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Mollova, Ayret; Kolesov, Igor; Androsch, Rene; Labuschagne, F.J.W.J. (Frederick Johannes Willem Jacobus); Focke, Walter Wilhelm; Funari, Sergio S. (Springer, 2013-11)The effect of the presence of a layered double hydroxide (LDH) nanofiller on the crystallization behavior of a random isotactic butene-1/ethylene copolymer was investigated. Addition of LDH enhanced heterogeneous nucleation ...
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Jariyavidyanont, Katalee; Williams, Jason L.; Rhoades, Alicyn M.; Kuehnert, Ines; Focke, Walter Wilhelm; Androsch, Rene (Wiley, 2018-07)The semicrystalline morphology of injection moldings of polyamide 11 (PA 11) prepared using mold temperatures of 25, 50, and 80°C was investigated. Regardless of the mold temperature, position‐resolved X‐ray diffraction ...
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Phillips, Justin; Focke, Walter Wilhelm; Du Toit, Elizabeth Louisa; Wesley‑Smith, James (Nature Publishing Group, 2020-11-26)Deep eutectic solvents aid the formulation of solid pesticide dosage forms for water-insoluble actives. This was demonstrated by encapsulating Amitraz powder in a low-melting matrix based on the eutectic mixture of urea ...
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Sibanda, Mthokozisi Mayibongwe; Focke, Walter Wilhelm; Labuschagne, F.J.W.J. (Frederick Johannes Willem Jacobus); Moyo, Lumbidzani; Nhlapo, N.S. (Nontete Suzan); Maity, Arjun; Muiambo, H.F. (Herminio Francisco); Massinga, Pedro Horacio; Crowther, N.A.S. (Nicolaas Andries Sadie), 1944-; Coetzee, Maureen; Brindley, Gordon W.A. (BioMed Central, 2011-10-18)BACKGROUND: The insecticide dichloro-diphenyl-trichloroethane (DDT) is widely used in indoor residual spraying (IRS) for malaria control owing to its longer residual efficacy in the field compared to other World ...
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Kaci, Mustapha; Dehouche, Nadjet; Focke, Walter Wilhelm; Van der Merwe, E.M. (Elizabet Margaretha) (Wiley, 2019-12)Accelerated photooxidation under ultraviolet (UV) test of polyamide 11 (PA11) films filled with unmodified vermiculite clay at 5 wt% was investigated up to 600 h. Film samples of ~60‐μm thick were prepared by melt compounding ...
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Sibanda, Mthokozisi Mayibongwe; Focke, Walter Wilhelm (BioMed Central, 2014-09-22)This study explored the effectiveness of inexpensive monofilament mesh linings produced by extruding insecticide impregnated polyethylene and poly(ethyleneco-vinyl acetate) (EVA) directly into a net format.
Now showing items 21-40 of 140