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Concentration, accumulation and uptake rate of Cu, Fe, Mn and Zn by wheat under irrigation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.C. du Preez --- Department of Soil Science, Republic of South Africa A. T.P. Bennie --- Department of Soil Science, Republic of South AfricaThe objective of this study was to obtain information on the Cu, Fe, Mn and Zn uptake patterns of wheat (Triticum aestivum L.) grown under normal irrigation farming conditions. Except for irrigation scheduling, the 13 farmers on whose farms the... -
Effect of zinc carrier on mobilisation of foliar-applied zinc above and below the point of application in ‘Kakamas’ peach seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa C. Schutte --- , Republic of South AfricaIn a pot trial using coarse sand as a potting medium and modified (low zinc) Hoagland solution as a nutrient source, single mid-shoot leaves of mildly zinc deficient ‘Kakamas’ peach seedlings were periodically dipped into aqueous solutions, prepared at 20... -
Effect of early-season zinc sprays on ‘Golden Delicious’ apple
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa C. Schutte --- , Republic of South AfricaA factorial field trial was carried out in a ‘Golden Delicious’ apple orchard in the Elgin area to test the hypothesis that early- season zinc (Zn) sprays exacerbate russet, and to determine the stage of development at which Zn sprays... -
Anew optimum value for zinc in the main maize producing sandy soils of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Van Biljon --- , Republic of South Africa C.A. Wright --- , Republic of South Africa D.S. Fouche --- , Republic of South Africa A.D.P. Botha --- , Republic of South AfricaSouth African farmers commenced applying zinc (Zn) during the 1960s at a rate of approximately 2 kg Zn ha−1. Although good yields were produced and Zn levels increased in South African maize fields, a recent survey revealed that maize meal... -
The sublethal effects of zinc at different water temperatures on selected haematological variables in Oreochromis mossambicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PP Buthelezi V Wepener DP CyrusTrace metals such as zinc play an important role in the normal metabolic functioning of all organisms. However, metals can become toxic if background concentrations are exceeded in the environment. This study investigated the sublethal effects of zinc on the... -
The toxicity of zinc to a selected macroinvertebrate, Adenophlebia auriculata (Ephemeroptera, Leptophlebiidae): method development
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: V Everitt --- Centre for Aquatic Toxicology, South Africa P-A Scherman --- Centre for Aquatic Toxicology, South Africa MH Villet --- Department of Zoology and Entomology, South AfricaThe South African water quality guidelines for the protection of the aquatic environment are constantly being updated. The Centre for Aquatic Toxicology of the Institute for Water Research, Rhodes University, uses artificial streams and toxicological methods to contribute to the... -
The effect of copper and zinc at neutral and acidic pH on the blood coagulation of Oreochromis mossambicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Nussey --- Department of Zoology, South Africa J HJ van Vuren --- Department of Zoology, South Africa HH du Preez --- Department of Zoology, South AfricaThe effect of copper and zinc on fish blood coagulation under alkaline and acidic conditions and the possible occurrence of disseminated intravascular clotting under these conditions have been poorly studied to date. -
The effect of copper and zinc at neutral and acidic pH on the general haematology and osmoregulation of Oreochromis mossambicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Nussey --- Department of Zoology, South Africa J HJ van Vuren --- Department of Zoology, South Africa HH du Preez --- Department of Zoology, South AfricaThe objective of this study was to determine the effect of sublethal copper and zinc concentrations at a neutral and an acidic pH, on selected haematological parameters as well as on the total osmolality and electrolyte concentrations of Oreochromis mossambicus... -
Copper, zinc and iron concentrations in water, sediment and Cynothrissa mento (Regan 1917) from Ologe Lagoon, Lagos, Nigeria: a preliminary survey
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CA Kumolu-Johnson --- Department of Fisheries, Faculty of Science, Nigeria PE Ndimele --- Department of Fisheries, Faculty of Science, Nigeria SL Akintola --- Department of Fisheries, Faculty of Science, Nigeria CC Jibuike --- Department of Microbiology and Botany, Faculty of Science, NigeriaThe levels of Cu, Fe and Zn in water, sediment and Cynothrissa mento, a commercially important fish species, were investigated from April 2007 to March 2008 at three sites in Ologe Lagoon. Metal levels in the water column and C... -
Exfoliative liver cytology in Oreochromis mossambicus as a bio-assessment tool for aquatic pollution
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ML Mokae --- Centre for Aquatic Research, Department of Zoology, South Africa JHJ van Vuren --- Centre for Aquatic Research, Department of Zoology, South Africa GM Pieterse --- Centre for Aquatic Research, Department of Zoology, South AfricaThe use of exfoliative cytology as a bio-assessment tool was evaluated to (1) identify and describe different cell types of normal liver cytology of Oreochromis mossambicus, (2) identify and describe changes in the cell types after exposure to cadmium and... -
Effects of heavy metals on the development and survival of abalone Haliotis midae larvae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RL Stofberg --- Department of Conservation Ecology and Entomology, South Africa CA Simon --- Department of Botany and Zoology, South Africa RG Snyman --- Department of Biodiversity and Conservation, Faculty of Applied Sciences, South AfricaDespite a growing abalone Haliotis midae industry in South Africa, few studies have measured the effects of heavy metals on larval survival and growth in the face of recent increases in marine pollution. The aim of this study was to... -
Laboratory evaluation of germinated and non-germinated bait base for the management of the house rat, Rattus rattus
Item type: Journal Article • Journal: African Zoology • Authors: Palaniyandi Sakthivel --- Research Department of Zoology, India Periyasamy Neelanarayanan --- Research Department of Zoology, IndiaGerminated and non-germinated cereals (paddy, Oryza sativa; pearl millet, Pennisetum typhoides; and ragi, Eleusine coracana) and pulses (green gram, Phaseolus aureus; black gram, Phaseolus mungo; and Bengal gram, Cicer arietinum) were evaluated to determine their suitability as a bait base... -
Comparative study of double-chamber microbial fuel cells (DC-MFCs) using Mfensi clay as ion-exchange-partition: Effect of electrodes
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: R.Y. Tamakloe --- Department of Physics, Ghana T. Opoku-Donkor --- Department of Physics, Ghana M.K.E. Donkor --- Department of Physics, Ghana H. Agamasu --- Department of Physics, GhanaAn alternative answer to the vital issues of electricity production and wastewater treatment leads to the application of microbial fuel cells. This study has developed a low-cost double-chambered microbial fuel cell (MFC) for electricity generation, which can also be used... -
Spatial variability of selected soil micronutrients under smallholder crop production in Zanyokwe, Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Alen Manyevere --- Department of Agronomy, South Africa Pardon Muchaonyerwa --- Discipline of Soil Science, School of Agriculture, Earth and Environmental Sciences, South Africa Pearson NS Mnkeni --- Department of Agronomy, South Africa Inos Dhau --- Department of Geography and Environmental Sciences, South AfricaUnderstanding spatial variability of soil nutrients, including that of micronutrients, is important for establishing best management practices in smallholder crop production. The objective of this study was to determine the status and spatial variability of potentially available zinc (Zn), copper... -
Necrotising migratory erythema leading to the diagnosis of a metastatic glucagonoma without diabetes
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Rahm Makan --- , South Africa Cloete Van Vuuren --- , South AfricaA case of necrotising migratory erythema (NME), which is one of the distinctive paraneoplastic skin manifestations associated with the glucagonoma syndrome, is described and discussed. In 80% of all patients with glucagonoma, NME is the first clinical sign. The glucagonoma... -
A comparison of zinc sources and extraction methods on sandy soils suitable for maize cropping
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CF Wessels --- , South Africa LF van Straaten --- , South Africa CC du Preez --- , South Africa GM Ceronio --- , South AfricaMaize is the most important crop produced for human and animal nourishment in South Africa. The crop is susceptible to zinc (Zn) deficiencies, which result in lower grain yields with poorer nutritional value. Knowledge of the nature and behaviour of... -
Risk of zinc deficiency among children aged 0–59 months in sub-Saharan Africa: a narrative review
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Mavis P Dembedza --- University of Zimbabwe, Zimbabwe Prosper Chopera --- University of Zimbabwe, Zimbabwe Tonderayi M Matsungo --- University of Zimbabwe, Zimbabwe