Search Results - "Dyk, J. C."

Identification of a subgroup of black South Africans with type 1 diabetes who are older at diagnosis but have lower levels of glutamic acid decarboxylase and islet antigen 2 autoantibodies by Padoa, C. J., Rheeder, P., Pirie, F. J., Motala, A. A., Dyk, J. C., Crowther, N. J.

“…Aims To compare the age at diagnosis and prevalence of islet autoantibody [glutamic acid decarboxylase (65 kDa) 65 and islet antigen 2] positivity in black and…”
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Liver histopathology of the sharptooth catfish Clarias gariepinus as a biomarker of aquatic pollution by van Dyk, J.C., Cochrane, M.J., Wagenaar, G.M.

“…► The liver histopathology reflected the pollution status of the freshwater systems. ► Fish from polluted sites had a higher prevalence of histopathological…”
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DDT contamination from indoor residual spraying for malaria control by Van Dyk, J.C., Bouwman, H., Barnhoorn, I.E.J., Bornman, M.S.

“…The insecticide DDT is still used in specific areas of South Africa for indoor residual spray (IRS) to control malaria vectors. Local residents could be…”
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Coal and coal ash characteristics to understand mineral transformations and slag formation by Van Dyk, J.C., Benson, S.A., Laumb, M.L., Waanders, B.

“…A knowledge of the composition and structure of minerals in coal is necessary in order to understand the mineral transformations and agglomerate or slag…”
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Histological changes in the liver of Oreochromis mossambicus (Cichlidae) after exposure to cadmium and zinc by van Dyk, J.C., Pieterse, G.M., van Vuren, J.H.J.

“…The toxic effects, of two heavy metals, cadmium (Cd) and zinc (Zn), on the histology of the liver of the southern African freshwater fish Oreochromis…”
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Organochlorine pesticide levels in Clarias gariepinus from polluted freshwater impoundments in South Africa and associated human health risks by Barnhoorn, I.E.J., van Dyk, J.C., Genthe, B., Harding, W.R., Wagenaar, G.M., Bornman, M.S.

“…•Clarias gariepinus muscle tissue bio-accumulated organochlorine pesticides.•Predicted risk of developing cancer is higher than the recommended safe value of…”
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Viscosity predictions of the slag composition of gasified coal, utilizing FactSage equilibrium modelling by van Dyk, J.C., Waanders, F.B., Benson, S.A., Laumb, M.L., Hack, K.

“…Agglomeration of ash particles provides the desired porosity of the ash bed for adequate agent (steam and oxygen) flow and distribution, whereas excessive…”
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Cholangioma in the Mozambique tilapia, Oreochromis mossambicus (Peters) by van Dyk, J C

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Manipulation of gasification coal feed in order to increase the ash fusion temperature of the coal enabling the gasifiers to operate at higher temperatures by van Dyk, J.C., Waanders, F.B.

“…Coal is a crucial feedstock for South Africa’s unique synfuels and petrochemicals industry and used by Sasol as a feedstock to produce synthesis gas via the…”
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Histopathological alterations in the liver of the sharptooth catfish Clarias gariepinus from polluted aquatic systems in South Africa by Marchand, M.J, van Dyk, J.C, Pieterse, G.M, Barnhoorn, I.E.J, Bornman, M.S

“…There is a need for sensitive bio-monitoring tools in toxicant impact assessment to indicate the effect of toxicants on fish health in polluted aquatic…”
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A proposed liver needle core biopsy technique for the sharptooth catfish Clarias gariepinus (Burchell) for use in fish health research by Tresise, M M, Mokae, M L L, Wagenaar, G M, Van Dyk, J C

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First report of nephrocalcinosis in a wild population of Mugil cephalus L. and Myxus capensis (Valenciennes) by McHugh, K J, Van Dyk, J C, Weyl, O L F, Smit, N J

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Intersex in feral indigenous freshwater Oreochromis mossambicus, from various parts in the Luvuvhu River, Limpopo Province, South Africa by Barnhoorn, I.E.J., van Dyk, J.C., Pieterse, G.M., Bornman, M.S.

“…This study reports on intersex in Oreochromis mossambicus, an indigenous fish species inhabiting most aquatic systems throughout South Africa (SA). Male fish…”
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Behaviour of calcium-containing minerals in the mechanism towards in situ CO2 capture during gasification by VAN DYK, J. C, WAANDERS, F. B, HACK, K

“…Mineral matter transformation and the behavior of mineral matter in the coal during gasification, provide more information on the suitability of a specific…”
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Effect of coal particle size distribution on packed bed pressure drop and gas flow distribution by Keyser, M.J., Conradie, M., Coertzen, M., Van Dyk, J.C.

“…This paper focuses on the role of coal particle size distribution on pressure drop and gas flow distribution through packed coal beds. This fundamental…”
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Online Analysis of Coal on A Conveyor Belt by use of Machine Vision and Kernel Methods by Aldrich, C., Jemwa, G. T., van Dyk, J. C., Keyser, M. J., van Heerden, J. H. P.

“…The application of machine vision systems to measure particle size distributions has among other things been driven by sophisticated control systems used to…”
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Influence of discard mineral matter on slag―liquid formation and ash melting properties of coal ― A FACTSAGE™ simulation study by VAN DYK, J. C, KEYSER, M. J

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Chemical fractionation tests on South African coal sources to obtain species-specific information on ash fusion temperatures (AFT) by van Dyk, J.C., Baxter, L.L., van Heerden, J.H.P., Coetzer, R.L.J.

“…Coals from the different sources used by Sasol vary substantially in terms of chemical and physical properties and directly relates to gasifier behavior. Due…”
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Quantification of oxygen capture in mineral matter during gasification by van Dyk, J.C., Waanders, F.B., van Heerden, J.H.P.

“…It has been observed that during the transformation of minerals at higher temperatures (>1000 °C), mineral species are formed containing a high number of…”
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Health effects in fish from the polluted Orlando Dam and Klipspruit wetland system, Soweto, South Africa by Bengu, TS, du Plessis, J, Modley, LS, van Dyk, JC

“…Pollution of aquatic ecosystems often results in adverse environmental disturbances, including physiological and/ or histomorphological changes in fish. The…”
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