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Effect of nitrogen on the oxalate and calcium content of Kikuyu grass (Pennisetum clandestinum Hochst)
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.P. Marais --- , Republic of South AfricaThe effect of the nitrogen content of Kikuyu grass (Pennisetum clandestinum) on the oxalate and calcium content of leaf and stem material was investigated. The grass contained equal portions of soluble and insoluble oxalate. Leaf material contained more than three... -
Atrazine metabolism in field-grown maize and the effect of atrazine phototoxicity on yield
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Malan --- , Republic of South Africa J.H. Visser --- Department of Botany, Republic of South Africa H.A. van de Venter --- Department of Botany, Republic of South AfricaMaize was grown under field conditions, applying conventional farming practices. Atrazine was sprayed pre- emergence at concentrations of 1,25 I ha−1ai. and 5 I ha−1ai. Severe phytotoxicity symptoms were visible from the first- to about the sixth-leaf stage i.e. 25–30... -
UTILIZATION OF PLANT MATERIALS BY JUVENILE AFRICAN CATFISH (CLARIAS GARIEPINUS) AND ITS IMPORTANCE IN FISH CULTURE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Douglas Clay --- Department of Agriculture, ZimbabweJuvenile African catfish Clarias gariepinus between 100 and 200 mm total length from Lake McIlwaine, Zimbabwe are able to digest plant proteins. The digestibility of three major plant proteins (maize, sunflower seed and soya meal) was 30,0, 65,4 and 84,3%... -
Predicting the extent of succulent thicket under current and future climate scenarios
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MP Robertson AR PalmerUsing data from the distribution records of the facultative CAM succulent shrub Portulacaria afra, and high resolution climate response surfaces, we developed a spatially explicit model of the potential distribution of the species in the Thicket Biome of the eastern... -
Can the End Products of Anaerobic Metabolism, Tauropine and D-lactate, Be Used As Metabolic Stress Indicators During Transport of Live South African Abalone Haliotis Midae?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S. O'Omolo G. Gäde P. A. Cook A. C. BrownThis study was undertaken to investigate whether the accumulation of end products of anaerobic metabolism can be used as an early indicator of deteriorating conditions during transport of live abalone Haliotis midae. A first series of experiments revealed that the... -
Metabolic adaptations and reduced respiration of the copepod Calanoides carinatus during diapause at depth in the Angola-Benguela Front and northern Benguela upwelling regions
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Auel W Hagen W Ekau HM VerheyeStage C5 copepodids and adult females of the herbivorous copepod Calanoides carinatus were sampled in the Angola-Benguela frontal region and northern Benguela upwelling area off Namibia in February–March 2002, using a multiple opening/closing net system. Respiration rates of C5s collected... -
Statin therapy for the octogenarian?
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: DJ Blom --- Division of Lipidology, Department of Medicine,Cardiovascular risk increases progressively with age. Statins in octogenarians may therefore potentially bring about large reductions in absolute risk. Epidemiological studies, however, show that statin prescription declines with age and is lowest in the oldest patients with the highest cardiovascular... -
Perioperative care of an infant with pyruvate dehydrogenase deficiency
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: E Dewhirst --- Research Fellow, Department of Anaesthesiology and Pain Medicine, S Rehman --- Department of Anaesthesiology and Pain Medicine, JD Tobias --- Chairman, Department of Anaesthesiology and Pain Medicine,The authors present the anaesthetic management of two infants with pyruvate dehydrogenase complex deficiency (PDCD), a rare genetic disorder of carbohydrate metabolism leading to lactic acidosis and neurological impairment. In the first case, a seven-month-old infant, undergoing closed reduction of... -
Diurnal and water salinity-dependent metabolic activity of juvenile white steenbras Lithognathus lithognathus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Kandjou --- Department of Ichthyology and Fisheries Science, South Africa H Kaiser --- Department of Ichthyology and Fisheries Science, South AfricaThe euryhaline white steenbras Lithognathus lithognathus is an important estuarine-dependent fish species in the South African marine and estuarine environment. Its tolerance to water quality fluctuations, in particular its metabolic rate responses to salinity changes, has not been studied. In... -
The effect of temperature and salinity on oxygen consumption in the brachyuran crab Cyclograpsus punctatus (Crustacea: Decapoda: Grapsidae)
Item type: Journal Article • Journal: African Zoology • Authors: James J. W. W. Winch --- Department of Zoology and Entomology, South Africa Alan N. Hodgson --- Department of Zoology and Entomology, South AfricaThe aquatic oxygen consumption of the estuarine brachyuran crab, Cyclograpsus punctatus, was investigated after a 24-hour acclimation period at different temperature (12.5, 20, 30°C) and salinity (9, 17.5, 35, and 44°) combinations . Salinity had no significant effect on oxygen... -
Metabolic disturbance and hepatic tissue damage induced by Eimeria papillata infection
Item type: Journal Article • Journal: African Zoology • Authors: Mohamed A. Dkhil --- Department of Zoology, College of Science, Saudi Arabia Saleh Al-Quraishy --- Department of Zoology, College of Science, Saudi ArabiaCoccidiosis is a parasitic disease, prevalent all over the world and has a significant impact on poultry production. The current study aimed to investigate the metabolic change as well as the hepatic inflammatory response caused by Eimeria papillata infection. Female... -
The half-yellow man
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: BJ Merwitz --- Faculty of Health Sciences, Carbohydrate and Lipid Metabolism Research Unit, South Africa FJ Raal --- Faculty of Health Sciences, Carbohydrate and Lipid Metabolism Research Unit, South Africa -
The metabolic profiles of HIV-infected and non-infected women in Mangaung, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Z. Hattingh --- Department of Nutrition and Dietetics, C. Walsh --- Department of Nutrition and Dietetics, Fj Veldman --- Fibrinogen Unit, Cj Bester --- Department of Biostatistics,Objective: To determine the biochemical nutritional status of HIV-infected women in Mangaung. -
Lipid emulsions in parenteral nutrition: does one size fits all?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: A. Laviano --- Department of Clinical Medicine, F. Rossi Fanelli --- Department of Clinical Medicine,Dietary lipids significantly contribute to preserve the efficiency of human metabolism and restore it during disease. Therefore, in the absence of absolute contraindications, it would not appear reasonable to exclude lipid emulsions when prescribing parenteral nutrition (PN). The metabolic role... -
Alcohol metabolism and health hazards associated with alcohol abuse in a South African context: a review
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Pt Pisa --- Centre of Excellence for Nutrition, T Loots Du --- Centre of Excellence for Nutrition, C Nienaber --- Centre for Human Metabonomics,The World Health Organization recently stated that alcohol consumption is the fifth leading cause of death worldwide and that intakes are increasing, especially in developing countries. Alcohol-related effects are major threats to global public health. There is growing recognition of... -
Metabolic activity throughout early development of dusky kob Argyrosomus japonicus (Sciaenidae)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Edworthy --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa B Erasmus --- Department of Ichthyology and Fisheries Science, South Africa JOG Kemp --- Department of Ichthyology and Fisheries Science, South Africa H Kaiser --- Department of Ichthyology and Fisheries Science, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe physiology of fishes in the early stages of development remains poorly assessed despite the importance of identifying energy bottlenecks in organisms faced with changing environmental conditions. This study describes the metabolic activity of dusky kob Argyrosomus japonicus throughout its... -
Interactive effects of pH and temperature on native and alien mussels from the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MP Emanuel --- Marine Research Institute, Department of Biological Sciences, South Africa D Pillay --- Marine Research Institute, Department of Biological Sciences, South Africa M van der Merwe --- Centre for Higher Education Development, South Africa GM Branch --- Marine Research Institute, Department of Biological Sciences, South AfricaGlobal warming and ocean acidification influence marine calcifying organisms, particularly those with external shells. Among these, mussels may compensate for environmental changes by phenotypic plasticity, but this may entail trade-offs between shell deposition, growth and reproduction. We assessed main and...